Deleted vendor folder

23 files changed, 0 insertions, 7746 deletions

diff --git a/vendor/cc/.cargo-checksum.json b/vendor/cc/.cargo-checksum.json
deleted file mode 100644
index b68f5a3..0000000
--- a/vendor/cc/.cargo-checksum.json
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/vendor/cc/Cargo.lock b/vendor/cc/Cargo.lock
deleted file mode 100644
index 0c9b73e..0000000
--- a/vendor/cc/Cargo.lock
+++ /dev/null
@@ -1,111 +0,0 @@
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diff --git a/vendor/cc/Cargo.toml b/vendor/cc/Cargo.toml
deleted file mode 100644
index e597edc..0000000
--- a/vendor/cc/Cargo.toml
+++ /dev/null
@@ -1,43 +0,0 @@
-# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
-#
-# When uploading crates to the registry Cargo will automatically
-# "normalize" Cargo.toml files for maximal compatibility
-# with all versions of Cargo and also rewrite `path` dependencies
-# to registry (e.g., crates.io) dependencies.
-#
-# If you are reading this file be aware that the original Cargo.toml
-# will likely look very different (and much more reasonable).
-# See Cargo.toml.orig for the original contents.
-
-[package]
-edition = "2018"
-name = "cc"
-version = "1.0.83"
-authors = ["Alex Crichton <alex@alexcrichton.com>"]
-exclude = ["/.github"]
-description = """
-A build-time dependency for Cargo build scripts to assist in invoking the native
-C compiler to compile native C code into a static archive to be linked into Rust
-code.
-"""
-homepage = "https://github.com/rust-lang/cc-rs"
-documentation = "https://docs.rs/cc"
-readme = "README.md"
-keywords = ["build-dependencies"]
-categories = ["development-tools::build-utils"]
-license = "MIT OR Apache-2.0"
-repository = "https://github.com/rust-lang/cc-rs"
-
-[dependencies.jobserver]
-version = "0.1.16"
-optional = true
-
-[dev-dependencies.tempfile]
-version = "3"
-
-[features]
-parallel = ["jobserver"]
-
-[target."cfg(unix)".dependencies.libc]
-version = "0.2.62"
-default-features = false
diff --git a/vendor/cc/LICENSE-APACHE b/vendor/cc/LICENSE-APACHE
deleted file mode 100644
index 16fe87b..0000000
--- a/vendor/cc/LICENSE-APACHE
+++ /dev/null
@@ -1,201 +0,0 @@
-                              Apache License
-                        Version 2.0, January 2004
-                     http://www.apache.org/licenses/
-
-TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-1. Definitions.
-
-   "License" shall mean the terms and conditions for use, reproduction,
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-   "Legal Entity" shall mean the union of the acting entity and all
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-       notices within Derivative Works that You distribute, alongside
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-   reproduction, and distribution of the Work otherwise complies with
-   the conditions stated in this License.
-
-5. Submission of Contributions. Unless You explicitly state otherwise,
-   any Contribution intentionally submitted for inclusion in the Work
-   by You to the Licensor shall be under the terms and conditions of
-   this License, without any additional terms or conditions.
-   Notwithstanding the above, nothing herein shall supersede or modify
-   the terms of any separate license agreement you may have executed
-   with Licensor regarding such Contributions.
-
-6. Trademarks. This License does not grant permission to use the trade
-   names, trademarks, service marks, or product names of the Licensor,
-   except as required for reasonable and customary use in describing the
-   origin of the Work and reproducing the content of the NOTICE file.
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-7. Disclaimer of Warranty. Unless required by applicable law or
-   agreed to in writing, Licensor provides the Work (and each
-   Contributor provides its Contributions) on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-   implied, including, without limitation, any warranties or conditions
-   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
-   PARTICULAR PURPOSE. You are solely responsible for determining the
-   appropriateness of using or redistributing the Work and assume any
-   risks associated with Your exercise of permissions under this License.
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-8. Limitation of Liability. In no event and under no legal theory,
-   whether in tort (including negligence), contract, or otherwise,
-   unless required by applicable law (such as deliberate and grossly
-   negligent acts) or agreed to in writing, shall any Contributor be
-   liable to You for damages, including any direct, indirect, special,
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-   incurred by, or claims asserted against, such Contributor by reason
-   of your accepting any such warranty or additional liability.
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-END OF TERMS AND CONDITIONS
-
-APPENDIX: How to apply the Apache License to your work.
-
-   To apply the Apache License to your work, attach the following
-   boilerplate notice, with the fields enclosed by brackets "[]"
-   replaced with your own identifying information. (Don't include
-   the brackets!)  The text should be enclosed in the appropriate
-   comment syntax for the file format. We also recommend that a
-   file or class name and description of purpose be included on the
-   same "printed page" as the copyright notice for easier
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-Copyright [yyyy] [name of copyright owner]
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-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
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-	http://www.apache.org/licenses/LICENSE-2.0
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-Unless required by applicable law or agreed to in writing, software
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-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
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diff --git a/vendor/cc/LICENSE-MIT b/vendor/cc/LICENSE-MIT
deleted file mode 100644
index 39e0ed6..0000000
--- a/vendor/cc/LICENSE-MIT
+++ /dev/null
@@ -1,25 +0,0 @@
-Copyright (c) 2014 Alex Crichton
-
-Permission is hereby granted, free of charge, to any
-person obtaining a copy of this software and associated
-documentation files (the "Software"), to deal in the
-Software without restriction, including without
-limitation the rights to use, copy, modify, merge,
-publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software
-is furnished to do so, subject to the following
-conditions:
-
-The above copyright notice and this permission notice
-shall be included in all copies or substantial portions
-of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
-ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
-TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
-PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
-SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
-IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-DEALINGS IN THE SOFTWARE.
diff --git a/vendor/cc/README.md b/vendor/cc/README.md
deleted file mode 100644
index a58dc68..0000000
--- a/vendor/cc/README.md
+++ /dev/null
@@ -1,233 +0,0 @@
-# cc-rs
-
-A library to compile C/C++/assembly into a Rust library/application.
-
-[Documentation](https://docs.rs/cc)
-
-A simple library meant to be used as a build dependency with Cargo packages in
-order to build a set of C/C++ files into a static archive. This crate calls out
-to the most relevant compiler for a platform, for example using `cl` on MSVC.
-
-## Using cc-rs
-
-First, you'll want to both add a build script for your crate (`build.rs`) and
-also add this crate to your `Cargo.toml` via:
-
-```toml
-[build-dependencies]
-cc = "1.0"
-```
-
-Next up, you'll want to write a build script like so:
-
-```rust,no_run
-// build.rs
-
-fn main() {
-    cc::Build::new()
-        .file("foo.c")
-        .file("bar.c")
-        .compile("foo");
-}
-```
-
-And that's it! Running `cargo build` should take care of the rest and your Rust
-application will now have the C files `foo.c` and `bar.c` compiled into a file
-named `libfoo.a`. If the C files contain
-
-```c
-void foo_function(void) { ... }
-```
-
-and
-
-```c
-int32_t bar_function(int32_t x) { ... }
-```
-
-you can call them from Rust by declaring them in
-your Rust code like so:
-
-```rust,no_run
-extern "C" {
-    fn foo_function();
-    fn bar_function(x: i32) -> i32;
-}
-
-pub fn call() {
-    unsafe {
-        foo_function();
-        bar_function(42);
-    }
-}
-
-fn main() {
-    // ...
-}
-```
-
-See [the Rustonomicon](https://doc.rust-lang.org/nomicon/ffi.html) for more details.
-
-## External configuration via environment variables
-
-To control the programs and flags used for building, the builder can set a
-number of different environment variables.
-
-* `CFLAGS` - a series of space separated flags passed to compilers. Note that
-             individual flags cannot currently contain spaces, so doing
-             something like: `-L=foo\ bar` is not possible.
-* `CC` - the actual C compiler used. Note that this is used as an exact
-         executable name, so (for example) no extra flags can be passed inside
-         this variable, and the builder must ensure that there aren't any
-         trailing spaces. This compiler must understand the `-c` flag. For
-         certain `TARGET`s, it also is assumed to know about other flags (most
-         common is `-fPIC`).
-* `AR` - the `ar` (archiver) executable to use to build the static library.
-* `CRATE_CC_NO_DEFAULTS` - the default compiler flags may cause conflicts in
-                           some cross compiling scenarios. Setting this variable
-                           will disable the generation of default compiler
-                           flags.
-* `CXX...` - see [C++ Support](#c-support).
-
-Furthermore, projects using this crate may specify custom environment variables
-to be inspected, for example via the `Build::try_flags_from_environment`
-function. Consult the project’s own documentation or its use of the `cc` crate
-for any additional variables it may use.
-
-Each of these variables can also be supplied with certain prefixes and suffixes,
-in the following prioritized order:
-
-1. `<var>_<target>` - for example, `CC_x86_64-unknown-linux-gnu`
-2. `<var>_<target_with_underscores>` - for example, `CC_x86_64_unknown_linux_gnu`
-3. `<build-kind>_<var>` - for example, `HOST_CC` or `TARGET_CFLAGS`
-4. `<var>` - a plain `CC`, `AR` as above.
-
-If none of these variables exist, cc-rs uses built-in defaults.
-
-In addition to the above optional environment variables, `cc-rs` has some
-functions with hard requirements on some variables supplied by [cargo's
-build-script driver][cargo] that it has the `TARGET`, `OUT_DIR`, `OPT_LEVEL`,
-and `HOST` variables.
-
-[cargo]: https://doc.rust-lang.org/cargo/reference/build-scripts.html#inputs-to-the-build-script
-
-## Optional features
-
-### Parallel
-
-Currently cc-rs supports parallel compilation (think `make -jN`) but this
-feature is turned off by default. To enable cc-rs to compile C/C++ in parallel,
-you can change your dependency to:
-
-```toml
-[build-dependencies]
-cc = { version = "1.0", features = ["parallel"] }
-```
-
-By default cc-rs will limit parallelism to `$NUM_JOBS`, or if not present it
-will limit it to the number of cpus on the machine. If you are using cargo,
-use `-jN` option of `build`, `test` and `run` commands as `$NUM_JOBS`
-is supplied by cargo.
-
-## Compile-time Requirements
-
-To work properly this crate needs access to a C compiler when the build script
-is being run. This crate does not ship a C compiler with it. The compiler
-required varies per platform, but there are three broad categories:
-
-* Unix platforms require `cc` to be the C compiler. This can be found by
-  installing cc/clang on Linux distributions and Xcode on macOS, for example.
-* Windows platforms targeting MSVC (e.g. your target triple ends in `-msvc`)
-  require Visual Studio to be installed. `cc-rs` attempts to locate it, and
-  if it fails, `cl.exe` is expected to be available in `PATH`. This can be
-  set up by running the appropriate developer tools shell.
-* Windows platforms targeting MinGW (e.g. your target triple ends in `-gnu`)
-  require `cc` to be available in `PATH`. We recommend the
-  [MinGW-w64](https://www.mingw-w64.org/) distribution, which is using the
-  [Win-builds](http://win-builds.org/) installation system.
-  You may also acquire it via
-  [MSYS2](https://www.msys2.org/), as explained [here][msys2-help].  Make sure
-  to install the appropriate architecture corresponding to your installation of
-  rustc. GCC from older [MinGW](http://www.mingw.org/) project is compatible
-  only with 32-bit rust compiler.
-
-[msys2-help]: https://github.com/rust-lang/rust#building-on-windows
-
-## C++ support
-
-`cc-rs` supports C++ libraries compilation by using the `cpp` method on
-`Build`:
-
-```rust,no_run
-fn main() {
-    cc::Build::new()
-        .cpp(true) // Switch to C++ library compilation.
-        .file("foo.cpp")
-        .compile("foo");
-}
-```
-
-For C++ libraries, the `CXX` and `CXXFLAGS` environment variables are used instead of `CC` and `CFLAGS`.
-
-The C++ standard library may be linked to the crate target. By default it's `libc++` for macOS, FreeBSD, and OpenBSD, `libc++_shared` for Android, nothing for MSVC, and `libstdc++` for anything else. It can be changed in one of two ways:
-
-1. by using the `cpp_link_stdlib` method on `Build`:
-    ```rust,no-run
-    fn main() {
-        cc::Build::new()
-            .cpp(true)
-            .file("foo.cpp")
-            .cpp_link_stdlib("stdc++") // use libstdc++
-            .compile("foo");
-    }
-    ```
-2. by setting the `CXXSTDLIB` environment variable.
-
-In particular, for Android you may want to [use `c++_static` if you have at most one shared library](https://developer.android.com/ndk/guides/cpp-support).
-
-Remember that C++ does name mangling so `extern "C"` might be required to enable Rust linker to find your functions.
-
-## CUDA C++ support
-
-`cc-rs` also supports compiling CUDA C++ libraries by using the `cuda` method
-on `Build`:
-
-```rust,no_run
-fn main() {
-    cc::Build::new()
-        // Switch to CUDA C++ library compilation using NVCC.
-        .cuda(true)
-        .cudart("static")
-        // Generate code for Maxwell (GTX 970, 980, 980 Ti, Titan X).
-        .flag("-gencode").flag("arch=compute_52,code=sm_52")
-        // Generate code for Maxwell (Jetson TX1).
-        .flag("-gencode").flag("arch=compute_53,code=sm_53")
-        // Generate code for Pascal (GTX 1070, 1080, 1080 Ti, Titan Xp).
-        .flag("-gencode").flag("arch=compute_61,code=sm_61")
-        // Generate code for Pascal (Tesla P100).
-        .flag("-gencode").flag("arch=compute_60,code=sm_60")
-        // Generate code for Pascal (Jetson TX2).
-        .flag("-gencode").flag("arch=compute_62,code=sm_62")
-        // Generate code in parallel
-        .flag("-t0")
-        .file("bar.cu")
-        .compile("bar");
-}
-```
-
-## License
-
-This project is licensed under either of
-
- * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
-   https://www.apache.org/licenses/LICENSE-2.0)
- * MIT license ([LICENSE-MIT](LICENSE-MIT) or
-   https://opensource.org/licenses/MIT)
-
-at your option.
-
-### Contribution
-
-Unless you explicitly state otherwise, any contribution intentionally submitted
-for inclusion in cc-rs by you, as defined in the Apache-2.0 license, shall be
-dual licensed as above, without any additional terms or conditions.
diff --git a/vendor/cc/src/bin/gcc-shim.rs b/vendor/cc/src/bin/gcc-shim.rs
deleted file mode 100644
index e5b5372..0000000
--- a/vendor/cc/src/bin/gcc-shim.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-#![cfg_attr(test, allow(dead_code))]
-
-use std::env;
-use std::fs::File;
-use std::io::{self, prelude::*};
-use std::path::PathBuf;
-
-fn main() {
-    let mut args = env::args();
-    let program = args.next().expect("Unexpected empty args");
-
-    let out_dir = PathBuf::from(
-        env::var_os("GCCTEST_OUT_DIR")
-            .unwrap_or_else(|| panic!("{}: GCCTEST_OUT_DIR not found", program)),
-    );
-
-    // Find the first nonexistent candidate file to which the program's args can be written.
-    let candidate = (0..).find_map(|i| {
-        let candidate = out_dir.join(format!("out{}", i));
-
-        if candidate.exists() {
-            // If the file exists, commands have already run. Try again.
-            None
-        } else {
-            Some(candidate)
-        }
-    }).unwrap_or_else(|| panic!("Cannot find the first nonexistent candidate file to which the program's args can be written under out_dir '{}'", out_dir.display()));
-
-    // Create a file and record the args passed to the command.
-    let f = File::create(&candidate).unwrap_or_else(|e| {
-        panic!(
-            "{}: can't create candidate: {}, error: {}",
-            program,
-            candidate.display(),
-            e
-        )
-    });
-    let mut f = io::BufWriter::new(f);
-
-    (|| {
-        for arg in args {
-            writeln!(f, "{}", arg)?;
-        }
-
-        f.flush()?;
-
-        let mut f = f.into_inner()?;
-        f.flush()?;
-        f.sync_all()
-    })()
-    .unwrap_or_else(|e| {
-        panic!(
-            "{}: can't write to candidate: {}, error: {}",
-            program,
-            candidate.display(),
-            e
-        )
-    });
-
-    // Create a file used by some tests.
-    let path = &out_dir.join("libfoo.a");
-    File::create(path).unwrap_or_else(|e| {
-        panic!(
-            "{}: can't create libfoo.a: {}, error: {}",
-            program,
-            path.display(),
-            e
-        )
-    });
-}
diff --git a/vendor/cc/src/com.rs b/vendor/cc/src/com.rs
deleted file mode 100644
index cd22844..0000000
--- a/vendor/cc/src/com.rs
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright © 2017 winapi-rs developers
-// Licensed under the Apache License, Version 2.0
-// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
-// All files in the project carrying such notice may not be copied, modified, or distributed
-// except according to those terms.
-
-#![allow(unused)]
-
-use crate::{
-    winapi::{IUnknown, Interface},
-    windows_sys::{
-        CoInitializeEx, SysFreeString, SysStringLen, BSTR, COINIT_MULTITHREADED, HRESULT, S_FALSE,
-        S_OK,
-    },
-};
-use std::{
-    ffi::{OsStr, OsString},
-    mem::ManuallyDrop,
-    ops::Deref,
-    os::windows::ffi::{OsStrExt, OsStringExt},
-    ptr::{null, null_mut},
-    slice::from_raw_parts,
-};
-
-pub fn initialize() -> Result<(), HRESULT> {
-    let err = unsafe { CoInitializeEx(null(), COINIT_MULTITHREADED) };
-    if err != S_OK && err != S_FALSE {
-        // S_FALSE just means COM is already initialized
-        Err(err)
-    } else {
-        Ok(())
-    }
-}
-
-pub struct ComPtr<T>(*mut T)
-where
-    T: Interface;
-impl<T> ComPtr<T>
-where
-    T: Interface,
-{
-    /// Creates a `ComPtr` to wrap a raw pointer.
-    /// It takes ownership over the pointer which means it does __not__ call `AddRef`.
-    /// `T` __must__ be a COM interface that inherits from `IUnknown`.
-    pub unsafe fn from_raw(ptr: *mut T) -> ComPtr<T> {
-        assert!(!ptr.is_null());
-        ComPtr(ptr)
-    }
-    /// Casts up the inheritance chain
-    pub fn up<U>(self) -> ComPtr<U>
-    where
-        T: Deref<Target = U>,
-        U: Interface,
-    {
-        ComPtr(self.into_raw() as *mut U)
-    }
-    /// Extracts the raw pointer.
-    /// You are now responsible for releasing it yourself.
-    pub fn into_raw(self) -> *mut T {
-        ManuallyDrop::new(self).0
-    }
-    /// For internal use only.
-    fn as_unknown(&self) -> &IUnknown {
-        unsafe { &*(self.0 as *mut IUnknown) }
-    }
-    /// Performs QueryInterface fun.
-    pub fn cast<U>(&self) -> Result<ComPtr<U>, i32>
-    where
-        U: Interface,
-    {
-        let mut obj = null_mut();
-        let err = unsafe { self.as_unknown().QueryInterface(&U::uuidof(), &mut obj) };
-        if err < 0 {
-            return Err(err);
-        }
-        Ok(unsafe { ComPtr::from_raw(obj as *mut U) })
-    }
-}
-impl<T> Deref for ComPtr<T>
-where
-    T: Interface,
-{
-    type Target = T;
-    fn deref(&self) -> &T {
-        unsafe { &*self.0 }
-    }
-}
-impl<T> Clone for ComPtr<T>
-where
-    T: Interface,
-{
-    fn clone(&self) -> Self {
-        unsafe {
-            self.as_unknown().AddRef();
-            ComPtr::from_raw(self.0)
-        }
-    }
-}
-impl<T> Drop for ComPtr<T>
-where
-    T: Interface,
-{
-    fn drop(&mut self) {
-        unsafe {
-            self.as_unknown().Release();
-        }
-    }
-}
-pub struct BStr(BSTR);
-impl BStr {
-    pub unsafe fn from_raw(s: BSTR) -> BStr {
-        BStr(s)
-    }
-    pub fn to_osstring(&self) -> OsString {
-        let len = unsafe { SysStringLen(self.0) };
-        let slice = unsafe { from_raw_parts(self.0, len as usize) };
-        OsStringExt::from_wide(slice)
-    }
-}
-impl Drop for BStr {
-    fn drop(&mut self) {
-        unsafe { SysFreeString(self.0) };
-    }
-}
-
-pub trait ToWide {
-    fn to_wide(&self) -> Vec<u16>;
-    fn to_wide_null(&self) -> Vec<u16>;
-}
-impl<T> ToWide for T
-where
-    T: AsRef<OsStr>,
-{
-    fn to_wide(&self) -> Vec<u16> {
-        self.as_ref().encode_wide().collect()
-    }
-    fn to_wide_null(&self) -> Vec<u16> {
-        self.as_ref().encode_wide().chain(Some(0)).collect()
-    }
-}
-pub trait FromWide
-where
-    Self: Sized,
-{
-    fn from_wide(wide: &[u16]) -> Self;
-    fn from_wide_null(wide: &[u16]) -> Self {
-        let len = wide.iter().take_while(|&&c| c != 0).count();
-        Self::from_wide(&wide[..len])
-    }
-}
-impl FromWide for OsString {
-    fn from_wide(wide: &[u16]) -> OsString {
-        OsStringExt::from_wide(wide)
-    }
-}
diff --git a/vendor/cc/src/lib.rs b/vendor/cc/src/lib.rs
deleted file mode 100644
index 2fe30b9..0000000
--- a/vendor/cc/src/lib.rs
+++ /dev/null
@@ -1,4024 +0,0 @@
-//! A library for build scripts to compile custom C code
-//!
-//! This library is intended to be used as a `build-dependencies` entry in
-//! `Cargo.toml`:
-//!
-//! ```toml
-//! [build-dependencies]
-//! cc = "1.0"
-//! ```
-//!
-//! The purpose of this crate is to provide the utility functions necessary to
-//! compile C code into a static archive which is then linked into a Rust crate.
-//! Configuration is available through the `Build` struct.
-//!
-//! This crate will automatically detect situations such as cross compilation or
-//! other environment variables set by Cargo and will build code appropriately.
-//!
-//! The crate is not limited to C code, it can accept any source code that can
-//! be passed to a C or C++ compiler. As such, assembly files with extensions
-//! `.s` (gcc/clang) and `.asm` (MSVC) can also be compiled.
-//!
-//! [`Build`]: struct.Build.html
-//!
-//! # Parallelism
-//!
-//! To parallelize computation, enable the `parallel` feature for the crate.
-//!
-//! ```toml
-//! [build-dependencies]
-//! cc = { version = "1.0", features = ["parallel"] }
-//! ```
-//! To specify the max number of concurrent compilation jobs, set the `NUM_JOBS`
-//! environment variable to the desired amount.
-//!
-//! Cargo will also set this environment variable when executed with the `-jN` flag.
-//!
-//! # Examples
-//!
-//! Use the `Build` struct to compile `src/foo.c`:
-//!
-//! ```no_run
-//! fn main() {
-//!     cc::Build::new()
-//!         .file("src/foo.c")
-//!         .define("FOO", Some("bar"))
-//!         .include("src")
-//!         .compile("foo");
-//! }
-//! ```
-
-#![doc(html_root_url = "https://docs.rs/cc/1.0")]
-#![cfg_attr(test, deny(warnings))]
-#![allow(deprecated)]
-#![deny(missing_docs)]
-
-use std::borrow::Cow;
-use std::collections::{hash_map, HashMap};
-use std::env;
-use std::ffi::{OsStr, OsString};
-use std::fmt::{self, Display, Formatter};
-use std::fs::{self, File};
-use std::hash::Hasher;
-use std::io::{self, BufRead, BufReader, Read, Write};
-use std::path::{Component, Path, PathBuf};
-use std::process::{Child, Command, Stdio};
-use std::sync::{Arc, Mutex};
-use std::thread::{self, JoinHandle};
-
-mod os_pipe;
-
-// These modules are all glue to support reading the MSVC version from
-// the registry and from COM interfaces
-#[cfg(windows)]
-mod registry;
-#[cfg(windows)]
-#[macro_use]
-mod winapi;
-#[cfg(windows)]
-mod com;
-#[cfg(windows)]
-mod setup_config;
-#[cfg(windows)]
-mod vs_instances;
-#[cfg(windows)]
-mod windows_sys;
-
-pub mod windows_registry;
-
-/// A builder for compilation of a native library.
-///
-/// A `Build` is the main type of the `cc` crate and is used to control all the
-/// various configuration options and such of a compile. You'll find more
-/// documentation on each method itself.
-#[derive(Clone, Debug)]
-pub struct Build {
-    include_directories: Vec<Arc<Path>>,
-    definitions: Vec<(Arc<str>, Option<Arc<str>>)>,
-    objects: Vec<Arc<Path>>,
-    flags: Vec<Arc<str>>,
-    flags_supported: Vec<Arc<str>>,
-    known_flag_support_status: Arc<Mutex<HashMap<String, bool>>>,
-    ar_flags: Vec<Arc<str>>,
-    asm_flags: Vec<Arc<str>>,
-    no_default_flags: bool,
-    files: Vec<Arc<Path>>,
-    cpp: bool,
-    cpp_link_stdlib: Option<Option<Arc<str>>>,
-    cpp_set_stdlib: Option<Arc<str>>,
-    cuda: bool,
-    cudart: Option<Arc<str>>,
-    std: Option<Arc<str>>,
-    target: Option<Arc<str>>,
-    host: Option<Arc<str>>,
-    out_dir: Option<Arc<Path>>,
-    opt_level: Option<Arc<str>>,
-    debug: Option<bool>,
-    force_frame_pointer: Option<bool>,
-    env: Vec<(Arc<OsStr>, Arc<OsStr>)>,
-    compiler: Option<Arc<Path>>,
-    archiver: Option<Arc<Path>>,
-    ranlib: Option<Arc<Path>>,
-    cargo_metadata: bool,
-    link_lib_modifiers: Vec<Arc<str>>,
-    pic: Option<bool>,
-    use_plt: Option<bool>,
-    static_crt: Option<bool>,
-    shared_flag: Option<bool>,
-    static_flag: Option<bool>,
-    warnings_into_errors: bool,
-    warnings: Option<bool>,
-    extra_warnings: Option<bool>,
-    env_cache: Arc<Mutex<HashMap<String, Option<Arc<str>>>>>,
-    apple_sdk_root_cache: Arc<Mutex<HashMap<String, OsString>>>,
-    emit_rerun_if_env_changed: bool,
-}
-
-/// Represents the types of errors that may occur while using cc-rs.
-#[derive(Clone, Debug)]
-enum ErrorKind {
-    /// Error occurred while performing I/O.
-    IOError,
-    /// Invalid architecture supplied.
-    ArchitectureInvalid,
-    /// Environment variable not found, with the var in question as extra info.
-    EnvVarNotFound,
-    /// Error occurred while using external tools (ie: invocation of compiler).
-    ToolExecError,
-    /// Error occurred due to missing external tools.
-    ToolNotFound,
-    /// One of the function arguments failed validation.
-    InvalidArgument,
-}
-
-/// Represents an internal error that occurred, with an explanation.
-#[derive(Clone, Debug)]
-pub struct Error {
-    /// Describes the kind of error that occurred.
-    kind: ErrorKind,
-    /// More explanation of error that occurred.
-    message: Cow<'static, str>,
-}
-
-impl Error {
-    fn new(kind: ErrorKind, message: impl Into<Cow<'static, str>>) -> Error {
-        Error {
-            kind,
-            message: message.into(),
-        }
-    }
-}
-
-impl From<io::Error> for Error {
-    fn from(e: io::Error) -> Error {
-        Error::new(ErrorKind::IOError, format!("{}", e))
-    }
-}
-
-impl Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{:?}: {}", self.kind, self.message)
-    }
-}
-
-impl std::error::Error for Error {}
-
-/// Configuration used to represent an invocation of a C compiler.
-///
-/// This can be used to figure out what compiler is in use, what the arguments
-/// to it are, and what the environment variables look like for the compiler.
-/// This can be used to further configure other build systems (e.g. forward
-/// along CC and/or CFLAGS) or the `to_command` method can be used to run the
-/// compiler itself.
-#[derive(Clone, Debug)]
-pub struct Tool {
-    path: PathBuf,
-    cc_wrapper_path: Option<PathBuf>,
-    cc_wrapper_args: Vec<OsString>,
-    args: Vec<OsString>,
-    env: Vec<(OsString, OsString)>,
-    family: ToolFamily,
-    cuda: bool,
-    removed_args: Vec<OsString>,
-}
-
-/// Represents the family of tools this tool belongs to.
-///
-/// Each family of tools differs in how and what arguments they accept.
-///
-/// Detection of a family is done on best-effort basis and may not accurately reflect the tool.
-#[derive(Copy, Clone, Debug, PartialEq)]
-enum ToolFamily {
-    /// Tool is GNU Compiler Collection-like.
-    Gnu,
-    /// Tool is Clang-like. It differs from the GCC in a sense that it accepts superset of flags
-    /// and its cross-compilation approach is different.
-    Clang,
-    /// Tool is the MSVC cl.exe.
-    Msvc { clang_cl: bool },
-}
-
-impl ToolFamily {
-    /// What the flag to request debug info for this family of tools look like
-    fn add_debug_flags(&self, cmd: &mut Tool, dwarf_version: Option<u32>) {
-        match *self {
-            ToolFamily::Msvc { .. } => {
-                cmd.push_cc_arg("-Z7".into());
-            }
-            ToolFamily::Gnu | ToolFamily::Clang => {
-                cmd.push_cc_arg(
-                    dwarf_version
-                        .map_or_else(|| "-g".into(), |v| format!("-gdwarf-{}", v))
-                        .into(),
-                );
-            }
-        }
-    }
-
-    /// What the flag to force frame pointers.
-    fn add_force_frame_pointer(&self, cmd: &mut Tool) {
-        match *self {
-            ToolFamily::Gnu | ToolFamily::Clang => {
-                cmd.push_cc_arg("-fno-omit-frame-pointer".into());
-            }
-            _ => (),
-        }
-    }
-
-    /// What the flags to enable all warnings
-    fn warnings_flags(&self) -> &'static str {
-        match *self {
-            ToolFamily::Msvc { .. } => "-W4",
-            ToolFamily::Gnu | ToolFamily::Clang => "-Wall",
-        }
-    }
-
-    /// What the flags to enable extra warnings
-    fn extra_warnings_flags(&self) -> Option<&'static str> {
-        match *self {
-            ToolFamily::Msvc { .. } => None,
-            ToolFamily::Gnu | ToolFamily::Clang => Some("-Wextra"),
-        }
-    }
-
-    /// What the flag to turn warning into errors
-    fn warnings_to_errors_flag(&self) -> &'static str {
-        match *self {
-            ToolFamily::Msvc { .. } => "-WX",
-            ToolFamily::Gnu | ToolFamily::Clang => "-Werror",
-        }
-    }
-
-    fn verbose_stderr(&self) -> bool {
-        *self == ToolFamily::Clang
-    }
-}
-
-/// Represents an object.
-///
-/// This is a source file -> object file pair.
-#[derive(Clone, Debug)]
-struct Object {
-    src: PathBuf,
-    dst: PathBuf,
-}
-
-impl Object {
-    /// Create a new source file -> object file pair.
-    fn new(src: PathBuf, dst: PathBuf) -> Object {
-        Object { src: src, dst: dst }
-    }
-}
-
-impl Build {
-    /// Construct a new instance of a blank set of configuration.
-    ///
-    /// This builder is finished with the [`compile`] function.
-    ///
-    /// [`compile`]: struct.Build.html#method.compile
-    pub fn new() -> Build {
-        Build {
-            include_directories: Vec::new(),
-            definitions: Vec::new(),
-            objects: Vec::new(),
-            flags: Vec::new(),
-            flags_supported: Vec::new(),
-            known_flag_support_status: Arc::new(Mutex::new(HashMap::new())),
-            ar_flags: Vec::new(),
-            asm_flags: Vec::new(),
-            no_default_flags: false,
-            files: Vec::new(),
-            shared_flag: None,
-            static_flag: None,
-            cpp: false,
-            cpp_link_stdlib: None,
-            cpp_set_stdlib: None,
-            cuda: false,
-            cudart: None,
-            std: None,
-            target: None,
-            host: None,
-            out_dir: None,
-            opt_level: None,
-            debug: None,
-            force_frame_pointer: None,
-            env: Vec::new(),
-            compiler: None,
-            archiver: None,
-            ranlib: None,
-            cargo_metadata: true,
-            link_lib_modifiers: Vec::new(),
-            pic: None,
-            use_plt: None,
-            static_crt: None,
-            warnings: None,
-            extra_warnings: None,
-            warnings_into_errors: false,
-            env_cache: Arc::new(Mutex::new(HashMap::new())),
-            apple_sdk_root_cache: Arc::new(Mutex::new(HashMap::new())),
-            emit_rerun_if_env_changed: true,
-        }
-    }
-
-    /// Add a directory to the `-I` or include path for headers
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// use std::path::Path;
-    ///
-    /// let library_path = Path::new("/path/to/library");
-    ///
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .include(library_path)
-    ///     .include("src")
-    ///     .compile("foo");
-    /// ```
-    pub fn include<P: AsRef<Path>>(&mut self, dir: P) -> &mut Build {
-        self.include_directories.push(dir.as_ref().into());
-        self
-    }
-
-    /// Add multiple directories to the `-I` include path.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// # use std::path::Path;
-    /// # let condition = true;
-    /// #
-    /// let mut extra_dir = None;
-    /// if condition {
-    ///     extra_dir = Some(Path::new("/path/to"));
-    /// }
-    ///
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .includes(extra_dir)
-    ///     .compile("foo");
-    /// ```
-    pub fn includes<P>(&mut self, dirs: P) -> &mut Build
-    where
-        P: IntoIterator,
-        P::Item: AsRef<Path>,
-    {
-        for dir in dirs {
-            self.include(dir);
-        }
-        self
-    }
-
-    /// Specify a `-D` variable with an optional value.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .define("FOO", "BAR")
-    ///     .define("BAZ", None)
-    ///     .compile("foo");
-    /// ```
-    pub fn define<'a, V: Into<Option<&'a str>>>(&mut self, var: &str, val: V) -> &mut Build {
-        self.definitions
-            .push((var.into(), val.into().map(Into::into)));
-        self
-    }
-
-    /// Add an arbitrary object file to link in
-    pub fn object<P: AsRef<Path>>(&mut self, obj: P) -> &mut Build {
-        self.objects.push(obj.as_ref().into());
-        self
-    }
-
-    /// Add an arbitrary flag to the invocation of the compiler
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .flag("-ffunction-sections")
-    ///     .compile("foo");
-    /// ```
-    pub fn flag(&mut self, flag: &str) -> &mut Build {
-        self.flags.push(flag.into());
-        self
-    }
-
-    /// Add a flag to the invocation of the ar
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .file("src/bar.c")
-    ///     .ar_flag("/NODEFAULTLIB:libc.dll")
-    ///     .compile("foo");
-    /// ```
-    pub fn ar_flag(&mut self, flag: &str) -> &mut Build {
-        self.ar_flags.push(flag.into());
-        self
-    }
-
-    /// Add a flag that will only be used with assembly files.
-    ///
-    /// The flag will be applied to input files with either a `.s` or
-    /// `.asm` extension (case insensitive).
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .asm_flag("-Wa,-defsym,abc=1")
-    ///     .file("src/foo.S")  // The asm flag will be applied here
-    ///     .file("src/bar.c")  // The asm flag will not be applied here
-    ///     .compile("foo");
-    /// ```
-    pub fn asm_flag(&mut self, flag: &str) -> &mut Build {
-        self.asm_flags.push(flag.into());
-        self
-    }
-
-    fn ensure_check_file(&self) -> Result<PathBuf, Error> {
-        let out_dir = self.get_out_dir()?;
-        let src = if self.cuda {
-            assert!(self.cpp);
-            out_dir.join("flag_check.cu")
-        } else if self.cpp {
-            out_dir.join("flag_check.cpp")
-        } else {
-            out_dir.join("flag_check.c")
-        };
-
-        if !src.exists() {
-            let mut f = fs::File::create(&src)?;
-            write!(f, "int main(void) {{ return 0; }}")?;
-        }
-
-        Ok(src)
-    }
-
-    /// Run the compiler to test if it accepts the given flag.
-    ///
-    /// For a convenience method for setting flags conditionally,
-    /// see `flag_if_supported()`.
-    ///
-    /// It may return error if it's unable to run the compiler with a test file
-    /// (e.g. the compiler is missing or a write to the `out_dir` failed).
-    ///
-    /// Note: Once computed, the result of this call is stored in the
-    /// `known_flag_support` field. If `is_flag_supported(flag)`
-    /// is called again, the result will be read from the hash table.
-    pub fn is_flag_supported(&self, flag: &str) -> Result<bool, Error> {
-        let mut known_status = self.known_flag_support_status.lock().unwrap();
-        if let Some(is_supported) = known_status.get(flag).cloned() {
-            return Ok(is_supported);
-        }
-
-        let out_dir = self.get_out_dir()?;
-        let src = self.ensure_check_file()?;
-        let obj = out_dir.join("flag_check");
-        let target = self.get_target()?;
-        let host = self.get_host()?;
-        let mut cfg = Build::new();
-        cfg.flag(flag)
-            .target(&target)
-            .opt_level(0)
-            .host(&host)
-            .debug(false)
-            .cpp(self.cpp)
-            .cuda(self.cuda);
-        if let Some(ref c) = self.compiler {
-            cfg.compiler(c.clone());
-        }
-        let mut compiler = cfg.try_get_compiler()?;
-
-        // Clang uses stderr for verbose output, which yields a false positive
-        // result if the CFLAGS/CXXFLAGS include -v to aid in debugging.
-        if compiler.family.verbose_stderr() {
-            compiler.remove_arg("-v".into());
-        }
-
-        let mut cmd = compiler.to_command();
-        let is_arm = target.contains("aarch64") || target.contains("arm");
-        let clang = compiler.family == ToolFamily::Clang;
-        let gnu = compiler.family == ToolFamily::Gnu;
-        command_add_output_file(
-            &mut cmd,
-            &obj,
-            self.cuda,
-            target.contains("msvc"),
-            clang,
-            gnu,
-            false,
-            is_arm,
-        );
-
-        // We need to explicitly tell msvc not to link and create an exe
-        // in the root directory of the crate
-        if target.contains("msvc") && !self.cuda {
-            cmd.arg("-c");
-        }
-
-        cmd.arg(&src);
-
-        let output = cmd.output()?;
-        let is_supported = output.status.success() && output.stderr.is_empty();
-
-        known_status.insert(flag.to_owned(), is_supported);
-        Ok(is_supported)
-    }
-
-    /// Add an arbitrary flag to the invocation of the compiler if it supports it
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .flag_if_supported("-Wlogical-op") // only supported by GCC
-    ///     .flag_if_supported("-Wunreachable-code") // only supported by clang
-    ///     .compile("foo");
-    /// ```
-    pub fn flag_if_supported(&mut self, flag: &str) -> &mut Build {
-        self.flags_supported.push(flag.into());
-        self
-    }
-
-    /// Add flags from the specified environment variable.
-    ///
-    /// Normally the `cc` crate will consult with the standard set of environment
-    /// variables (such as `CFLAGS` and `CXXFLAGS`) to construct the compiler invocation. Use of
-    /// this method provides additional levers for the end user to use when configuring the build
-    /// process.
-    ///
-    /// Just like the standard variables, this method will search for an environment variable with
-    /// appropriate target prefixes, when appropriate.
-    ///
-    /// # Examples
-    ///
-    /// This method is particularly beneficial in introducing the ability to specify crate-specific
-    /// flags.
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .try_flags_from_environment(concat!(env!("CARGO_PKG_NAME"), "_CFLAGS"))
-    ///     .expect("the environment variable must be specified and UTF-8")
-    ///     .compile("foo");
-    /// ```
-    ///
-    pub fn try_flags_from_environment(&mut self, environ_key: &str) -> Result<&mut Build, Error> {
-        let flags = self.envflags(environ_key)?;
-        self.flags.extend(flags.into_iter().map(Into::into));
-        Ok(self)
-    }
-
-    /// Set the `-shared` flag.
-    ///
-    /// When enabled, the compiler will produce a shared object which can
-    /// then be linked with other objects to form an executable.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .shared_flag(true)
-    ///     .compile("libfoo.so");
-    /// ```
-    pub fn shared_flag(&mut self, shared_flag: bool) -> &mut Build {
-        self.shared_flag = Some(shared_flag);
-        self
-    }
-
-    /// Set the `-static` flag.
-    ///
-    /// When enabled on systems that support dynamic linking, this prevents
-    /// linking with the shared libraries.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .shared_flag(true)
-    ///     .static_flag(true)
-    ///     .compile("foo");
-    /// ```
-    pub fn static_flag(&mut self, static_flag: bool) -> &mut Build {
-        self.static_flag = Some(static_flag);
-        self
-    }
-
-    /// Disables the generation of default compiler flags. The default compiler
-    /// flags may cause conflicts in some cross compiling scenarios.
-    ///
-    /// Setting the `CRATE_CC_NO_DEFAULTS` environment variable has the same
-    /// effect as setting this to `true`. The presence of the environment
-    /// variable and the value of `no_default_flags` will be OR'd together.
-    pub fn no_default_flags(&mut self, no_default_flags: bool) -> &mut Build {
-        self.no_default_flags = no_default_flags;
-        self
-    }
-
-    /// Add a file which will be compiled
-    pub fn file<P: AsRef<Path>>(&mut self, p: P) -> &mut Build {
-        self.files.push(p.as_ref().into());
-        self
-    }
-
-    /// Add files which will be compiled
-    pub fn files<P>(&mut self, p: P) -> &mut Build
-    where
-        P: IntoIterator,
-        P::Item: AsRef<Path>,
-    {
-        for file in p.into_iter() {
-            self.file(file);
-        }
-        self
-    }
-
-    /// Set C++ support.
-    ///
-    /// The other `cpp_*` options will only become active if this is set to
-    /// `true`.
-    ///
-    /// The name of the C++ standard library to link is decided by:
-    /// 1. If [cpp_link_stdlib](Build::cpp_link_stdlib) is set, use its value.
-    /// 2. Else if the `CXXSTDLIB` environment variable is set, use its value.
-    /// 3. Else the default is `libc++` for OS X and BSDs, `libc++_shared` for Android,
-    /// `None` for MSVC and `libstdc++` for anything else.
-    pub fn cpp(&mut self, cpp: bool) -> &mut Build {
-        self.cpp = cpp;
-        self
-    }
-
-    /// Set CUDA C++ support.
-    ///
-    /// Enabling CUDA will invoke the CUDA compiler, NVCC. While NVCC accepts
-    /// the most common compiler flags, e.g. `-std=c++17`, some project-specific
-    /// flags might have to be prefixed with "-Xcompiler" flag, for example as
-    /// `.flag("-Xcompiler").flag("-fpermissive")`. See the documentation for
-    /// `nvcc`, the CUDA compiler driver, at https://docs.nvidia.com/cuda/cuda-compiler-driver-nvcc/
-    /// for more information.
-    ///
-    /// If enabled, this also implicitly enables C++ support.
-    pub fn cuda(&mut self, cuda: bool) -> &mut Build {
-        self.cuda = cuda;
-        if cuda {
-            self.cpp = true;
-            self.cudart = Some("static".into());
-        }
-        self
-    }
-
-    /// Link CUDA run-time.
-    ///
-    /// This option mimics the `--cudart` NVCC command-line option. Just like
-    /// the original it accepts `{none|shared|static}`, with default being
-    /// `static`. The method has to be invoked after `.cuda(true)`, or not
-    /// at all, if the default is right for the project.
-    pub fn cudart(&mut self, cudart: &str) -> &mut Build {
-        if self.cuda {
-            self.cudart = Some(cudart.into());
-        }
-        self
-    }
-
-    /// Specify the C or C++ language standard version.
-    ///
-    /// These values are common to modern versions of GCC, Clang and MSVC:
-    /// - `c11` for ISO/IEC 9899:2011
-    /// - `c17` for ISO/IEC 9899:2018
-    /// - `c++14` for ISO/IEC 14882:2014
-    /// - `c++17` for ISO/IEC 14882:2017
-    /// - `c++20` for ISO/IEC 14882:2020
-    ///
-    /// Other values have less broad support, e.g. MSVC does not support `c++11`
-    /// (`c++14` is the minimum), `c89` (omit the flag instead) or `c99`.
-    ///
-    /// For compiling C++ code, you should also set `.cpp(true)`.
-    ///
-    /// The default is that no standard flag is passed to the compiler, so the
-    /// language version will be the compiler's default.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/modern.cpp")
-    ///     .cpp(true)
-    ///     .std("c++17")
-    ///     .compile("modern");
-    /// ```
-    pub fn std(&mut self, std: &str) -> &mut Build {
-        self.std = Some(std.into());
-        self
-    }
-
-    /// Set warnings into errors flag.
-    ///
-    /// Disabled by default.
-    ///
-    /// Warning: turning warnings into errors only make sense
-    /// if you are a developer of the crate using cc-rs.
-    /// Some warnings only appear on some architecture or
-    /// specific version of the compiler. Any user of this crate,
-    /// or any other crate depending on it, could fail during
-    /// compile time.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .warnings_into_errors(true)
-    ///     .compile("libfoo.a");
-    /// ```
-    pub fn warnings_into_errors(&mut self, warnings_into_errors: bool) -> &mut Build {
-        self.warnings_into_errors = warnings_into_errors;
-        self
-    }
-
-    /// Set warnings flags.
-    ///
-    /// Adds some flags:
-    /// - "-Wall" for MSVC.
-    /// - "-Wall", "-Wextra" for GNU and Clang.
-    ///
-    /// Enabled by default.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .warnings(false)
-    ///     .compile("libfoo.a");
-    /// ```
-    pub fn warnings(&mut self, warnings: bool) -> &mut Build {
-        self.warnings = Some(warnings);
-        self.extra_warnings = Some(warnings);
-        self
-    }
-
-    /// Set extra warnings flags.
-    ///
-    /// Adds some flags:
-    /// - nothing for MSVC.
-    /// - "-Wextra" for GNU and Clang.
-    ///
-    /// Enabled by default.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// // Disables -Wextra, -Wall remains enabled:
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .extra_warnings(false)
-    ///     .compile("libfoo.a");
-    /// ```
-    pub fn extra_warnings(&mut self, warnings: bool) -> &mut Build {
-        self.extra_warnings = Some(warnings);
-        self
-    }
-
-    /// Set the standard library to link against when compiling with C++
-    /// support.
-    ///
-    /// If the `CXXSTDLIB` environment variable is set, its value will
-    /// override the default value, but not the value explicitly set by calling
-    /// this function.
-    ///
-    /// A value of `None` indicates that no automatic linking should happen,
-    /// otherwise cargo will link against the specified library.
-    ///
-    /// The given library name must not contain the `lib` prefix.
-    ///
-    /// Common values:
-    /// - `stdc++` for GNU
-    /// - `c++` for Clang
-    /// - `c++_shared` or `c++_static` for Android
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .shared_flag(true)
-    ///     .cpp_link_stdlib("stdc++")
-    ///     .compile("libfoo.so");
-    /// ```
-    pub fn cpp_link_stdlib<'a, V: Into<Option<&'a str>>>(
-        &mut self,
-        cpp_link_stdlib: V,
-    ) -> &mut Build {
-        self.cpp_link_stdlib = Some(cpp_link_stdlib.into().map(|s| s.into()));
-        self
-    }
-
-    /// Force the C++ compiler to use the specified standard library.
-    ///
-    /// Setting this option will automatically set `cpp_link_stdlib` to the same
-    /// value.
-    ///
-    /// The default value of this option is always `None`.
-    ///
-    /// This option has no effect when compiling for a Visual Studio based
-    /// target.
-    ///
-    /// This option sets the `-stdlib` flag, which is only supported by some
-    /// compilers (clang, icc) but not by others (gcc). The library will not
-    /// detect which compiler is used, as such it is the responsibility of the
-    /// caller to ensure that this option is only used in conjunction with a
-    /// compiler which supports the `-stdlib` flag.
-    ///
-    /// A value of `None` indicates that no specific C++ standard library should
-    /// be used, otherwise `-stdlib` is added to the compile invocation.
-    ///
-    /// The given library name must not contain the `lib` prefix.
-    ///
-    /// Common values:
-    /// - `stdc++` for GNU
-    /// - `c++` for Clang
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .cpp_set_stdlib("c++")
-    ///     .compile("libfoo.a");
-    /// ```
-    pub fn cpp_set_stdlib<'a, V: Into<Option<&'a str>>>(
-        &mut self,
-        cpp_set_stdlib: V,
-    ) -> &mut Build {
-        let cpp_set_stdlib = cpp_set_stdlib.into();
-        self.cpp_set_stdlib = cpp_set_stdlib.map(|s| s.into());
-        self.cpp_link_stdlib(cpp_set_stdlib);
-        self
-    }
-
-    /// Configures the target this configuration will be compiling for.
-    ///
-    /// This option is automatically scraped from the `TARGET` environment
-    /// variable by build scripts, so it's not required to call this function.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .target("aarch64-linux-android")
-    ///     .compile("foo");
-    /// ```
-    pub fn target(&mut self, target: &str) -> &mut Build {
-        self.target = Some(target.into());
-        self
-    }
-
-    /// Configures the host assumed by this configuration.
-    ///
-    /// This option is automatically scraped from the `HOST` environment
-    /// variable by build scripts, so it's not required to call this function.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// cc::Build::new()
-    ///     .file("src/foo.c")
-    ///     .host("arm-linux-gnueabihf")
-    ///     .compile("foo");
-    /// ```
-    pub fn host(&mut self, host: &str) -> &mut Build {
-        self.host = Some(host.into());
-        self
-    }
-
-    /// Configures the optimization level of the generated object files.
-    ///
-    /// This option is automatically scraped from the `OPT_LEVEL` environment
-    /// variable by build scripts, so it's not required to call this function.
-    pub fn opt_level(&mut self, opt_level: u32) -> &mut Build {
-        self.opt_level = Some(opt_level.to_string().into());
-        self
-    }
-
-    /// Configures the optimization level of the generated object files.
-    ///
-    /// This option is automatically scraped from the `OPT_LEVEL` environment
-    /// variable by build scripts, so it's not required to call this function.
-    pub fn opt_level_str(&mut self, opt_level: &str) -> &mut Build {
-        self.opt_level = Some(opt_level.into());
-        self
-    }
-
-    /// Configures whether the compiler will emit debug information when
-    /// generating object files.
-    ///
-    /// This option is automatically scraped from the `DEBUG` environment
-    /// variable by build scripts, so it's not required to call this function.
-    pub fn debug(&mut self, debug: bool) -> &mut Build {
-        self.debug = Some(debug);
-        self
-    }
-
-    /// Configures whether the compiler will emit instructions to store
-    /// frame pointers during codegen.
-    ///
-    /// This option is automatically enabled when debug information is emitted.
-    /// Otherwise the target platform compiler's default will be used.
-    /// You can use this option to force a specific setting.
-    pub fn force_frame_pointer(&mut self, force: bool) -> &mut Build {
-        self.force_frame_pointer = Some(force);
-        self
-    }
-
-    /// Configures the output directory where all object files and static
-    /// libraries will be located.
-    ///
-    /// This option is automatically scraped from the `OUT_DIR` environment
-    /// variable by build scripts, so it's not required to call this function.
-    pub fn out_dir<P: AsRef<Path>>(&mut self, out_dir: P) -> &mut Build {
-        self.out_dir = Some(out_dir.as_ref().into());
-        self
-    }
-
-    /// Configures the compiler to be used to produce output.
-    ///
-    /// This option is automatically determined from the target platform or a
-    /// number of environment variables, so it's not required to call this
-    /// function.
-    pub fn compiler<P: AsRef<Path>>(&mut self, compiler: P) -> &mut Build {
-        self.compiler = Some(compiler.as_ref().into());
-        self
-    }
-
-    /// Configures the tool used to assemble archives.
-    ///
-    /// This option is automatically determined from the target platform or a
-    /// number of environment variables, so it's not required to call this
-    /// function.
-    pub fn archiver<P: AsRef<Path>>(&mut self, archiver: P) -> &mut Build {
-        self.archiver = Some(archiver.as_ref().into());
-        self
-    }
-
-    /// Configures the tool used to index archives.
-    ///
-    /// This option is automatically determined from the target platform or a
-    /// number of environment variables, so it's not required to call this
-    /// function.
-    pub fn ranlib<P: AsRef<Path>>(&mut self, ranlib: P) -> &mut Build {
-        self.ranlib = Some(ranlib.as_ref().into());
-        self
-    }
-
-    /// Define whether metadata should be emitted for cargo allowing it to
-    /// automatically link the binary. Defaults to `true`.
-    ///
-    /// The emitted metadata is:
-    ///
-    ///  - `rustc-link-lib=static=`*compiled lib*
-    ///  - `rustc-link-search=native=`*target folder*
-    ///  - When target is MSVC, the ATL-MFC libs are added via `rustc-link-search=native=`
-    ///  - When C++ is enabled, the C++ stdlib is added via `rustc-link-lib`
-    ///  - If `emit_rerun_if_env_changed` is not `false`, `rerun-if-env-changed=`*env*
-    ///
-    pub fn cargo_metadata(&mut self, cargo_metadata: bool) -> &mut Build {
-        self.cargo_metadata = cargo_metadata;
-        self
-    }
-
-    /// Adds a native library modifier that will be added to the
-    /// `rustc-link-lib=static:MODIFIERS=LIBRARY_NAME` metadata line
-    /// emitted for cargo if `cargo_metadata` is enabled.
-    /// See https://doc.rust-lang.org/rustc/command-line-arguments.html#-l-link-the-generated-crate-to-a-native-library
-    /// for the list of modifiers accepted by rustc.
-    pub fn link_lib_modifier(&mut self, link_lib_modifier: &str) -> &mut Build {
-        self.link_lib_modifiers.push(link_lib_modifier.into());
-        self
-    }
-
-    /// Configures whether the compiler will emit position independent code.
-    ///
-    /// This option defaults to `false` for `windows-gnu` and bare metal targets and
-    /// to `true` for all other targets.
-    pub fn pic(&mut self, pic: bool) -> &mut Build {
-        self.pic = Some(pic);
-        self
-    }
-
-    /// Configures whether the Procedure Linkage Table is used for indirect
-    /// calls into shared libraries.
-    ///
-    /// The PLT is used to provide features like lazy binding, but introduces
-    /// a small performance loss due to extra pointer indirection. Setting
-    /// `use_plt` to `false` can provide a small performance increase.
-    ///
-    /// Note that skipping the PLT requires a recent version of GCC/Clang.
-    ///
-    /// This only applies to ELF targets. It has no effect on other platforms.
-    pub fn use_plt(&mut self, use_plt: bool) -> &mut Build {
-        self.use_plt = Some(use_plt);
-        self
-    }
-
-    /// Define whether metadata should be emitted for cargo to detect environment
-    /// changes that should trigger a rebuild.
-    ///
-    /// This has no effect if the `cargo_metadata` option is `false`.
-    ///
-    /// This option defaults to `true`.
-    pub fn emit_rerun_if_env_changed(&mut self, emit_rerun_if_env_changed: bool) -> &mut Build {
-        self.emit_rerun_if_env_changed = emit_rerun_if_env_changed;
-        self
-    }
-
-    /// Configures whether the /MT flag or the /MD flag will be passed to msvc build tools.
-    ///
-    /// This option defaults to `false`, and affect only msvc targets.
-    pub fn static_crt(&mut self, static_crt: bool) -> &mut Build {
-        self.static_crt = Some(static_crt);
-        self
-    }
-
-    #[doc(hidden)]
-    pub fn __set_env<A, B>(&mut self, a: A, b: B) -> &mut Build
-    where
-        A: AsRef<OsStr>,
-        B: AsRef<OsStr>,
-    {
-        self.env.push((a.as_ref().into(), b.as_ref().into()));
-        self
-    }
-
-    /// Run the compiler, generating the file `output`
-    ///
-    /// This will return a result instead of panicing; see compile() for the complete description.
-    pub fn try_compile(&self, output: &str) -> Result<(), Error> {
-        let mut output_components = Path::new(output).components();
-        match (output_components.next(), output_components.next()) {
-            (Some(Component::Normal(_)), None) => {}
-            _ => {
-                return Err(Error::new(
-                    ErrorKind::InvalidArgument,
-                    "argument of `compile` must be a single normal path component",
-                ));
-            }
-        }
-
-        let (lib_name, gnu_lib_name) = if output.starts_with("lib") && output.ends_with(".a") {
-            (&output[3..output.len() - 2], output.to_owned())
-        } else {
-            let mut gnu = String::with_capacity(5 + output.len());
-            gnu.push_str("lib");
-            gnu.push_str(&output);
-            gnu.push_str(".a");
-            (output, gnu)
-        };
-        let dst = self.get_out_dir()?;
-
-        let mut objects = Vec::new();
-        for file in self.files.iter() {
-            let obj = if file.has_root() || file.components().any(|x| x == Component::ParentDir) {
-                // If `file` is an absolute path or might not be usable directly as a suffix due to
-                // using "..", use the `basename` prefixed with the `dirname`'s hash to ensure name
-                // uniqueness.
-                let basename = file
-                    .file_name()
-                    .ok_or_else(|| Error::new(ErrorKind::InvalidArgument, "file_name() failure"))?
-                    .to_string_lossy();
-                let dirname = file
-                    .parent()
-                    .ok_or_else(|| Error::new(ErrorKind::InvalidArgument, "parent() failure"))?
-                    .to_string_lossy();
-                let mut hasher = hash_map::DefaultHasher::new();
-                hasher.write(dirname.to_string().as_bytes());
-                dst.join(format!("{:016x}-{}", hasher.finish(), basename))
-                    .with_extension("o")
-            } else {
-                dst.join(file).with_extension("o")
-            };
-            let obj = if !obj.starts_with(&dst) {
-                dst.join(obj.file_name().ok_or_else(|| {
-                    Error::new(ErrorKind::IOError, "Getting object file details failed.")
-                })?)
-            } else {
-                obj
-            };
-
-            match obj.parent() {
-                Some(s) => fs::create_dir_all(s)?,
-                None => {
-                    return Err(Error::new(
-                        ErrorKind::IOError,
-                        "Getting object file details failed.",
-                    ));
-                }
-            };
-
-            objects.push(Object::new(file.to_path_buf(), obj));
-        }
-
-        let print = PrintThread::new()?;
-
-        self.compile_objects(&objects, &print)?;
-        self.assemble(lib_name, &dst.join(gnu_lib_name), &objects, &print)?;
-
-        if self.get_target()?.contains("msvc") {
-            let compiler = self.get_base_compiler()?;
-            let atlmfc_lib = compiler
-                .env()
-                .iter()
-                .find(|&&(ref var, _)| var.as_os_str() == OsStr::new("LIB"))
-                .and_then(|&(_, ref lib_paths)| {
-                    env::split_paths(lib_paths).find(|path| {
-                        let sub = Path::new("atlmfc/lib");
-                        path.ends_with(sub) || path.parent().map_or(false, |p| p.ends_with(sub))
-                    })
-                });
-
-            if let Some(atlmfc_lib) = atlmfc_lib {
-                self.print(&format_args!(
-                    "cargo:rustc-link-search=native={}",
-                    atlmfc_lib.display()
-                ));
-            }
-        }
-
-        if self.link_lib_modifiers.is_empty() {
-            self.print(&format_args!("cargo:rustc-link-lib=static={}", lib_name));
-        } else {
-            let m = self.link_lib_modifiers.join(",");
-            self.print(&format_args!(
-                "cargo:rustc-link-lib=static:{}={}",
-                m, lib_name
-            ));
-        }
-        self.print(&format_args!(
-            "cargo:rustc-link-search=native={}",
-            dst.display()
-        ));
-
-        // Add specific C++ libraries, if enabled.
-        if self.cpp {
-            if let Some(stdlib) = self.get_cpp_link_stdlib()? {
-                self.print(&format_args!("cargo:rustc-link-lib={}", stdlib));
-            }
-        }
-
-        let cudart = match &self.cudart {
-            Some(opt) => &*opt, // {none|shared|static}
-            None => "none",
-        };
-        if cudart != "none" {
-            if let Some(nvcc) = which(&self.get_compiler().path, None) {
-                // Try to figure out the -L search path. If it fails,
-                // it's on user to specify one by passing it through
-                // RUSTFLAGS environment variable.
-                let mut libtst = false;
-                let mut libdir = nvcc;
-                libdir.pop(); // remove 'nvcc'
-                libdir.push("..");
-                let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
-                if cfg!(target_os = "linux") {
-                    libdir.push("targets");
-                    libdir.push(target_arch.to_owned() + "-linux");
-                    libdir.push("lib");
-                    libtst = true;
-                } else if cfg!(target_env = "msvc") {
-                    libdir.push("lib");
-                    match target_arch.as_str() {
-                        "x86_64" => {
-                            libdir.push("x64");
-                            libtst = true;
-                        }
-                        "x86" => {
-                            libdir.push("Win32");
-                            libtst = true;
-                        }
-                        _ => libtst = false,
-                    }
-                }
-                if libtst && libdir.is_dir() {
-                    println!(
-                        "cargo:rustc-link-search=native={}",
-                        libdir.to_str().unwrap()
-                    );
-                }
-
-                // And now the -l flag.
-                let lib = match cudart {
-                    "shared" => "cudart",
-                    "static" => "cudart_static",
-                    bad => panic!("unsupported cudart option: {}", bad),
-                };
-                println!("cargo:rustc-link-lib={}", lib);
-            }
-        }
-
-        Ok(())
-    }
-
-    /// Run the compiler, generating the file `output`
-    ///
-    /// # Library name
-    ///
-    /// The `output` string argument determines the file name for the compiled
-    /// library. The Rust compiler will create an assembly named "lib"+output+".a".
-    /// MSVC will create a file named output+".lib".
-    ///
-    /// The choice of `output` is close to arbitrary, but:
-    ///
-    /// - must be nonempty,
-    /// - must not contain a path separator (`/`),
-    /// - must be unique across all `compile` invocations made by the same build
-    ///   script.
-    ///
-    /// If your build script compiles a single source file, the base name of
-    /// that source file would usually be reasonable:
-    ///
-    /// ```no_run
-    /// cc::Build::new().file("blobstore.c").compile("blobstore");
-    /// ```
-    ///
-    /// Compiling multiple source files, some people use their crate's name, or
-    /// their crate's name + "-cc".
-    ///
-    /// Otherwise, please use your imagination.
-    ///
-    /// For backwards compatibility, if `output` starts with "lib" *and* ends
-    /// with ".a", a second "lib" prefix and ".a" suffix do not get added on,
-    /// but this usage is deprecated; please omit `lib` and `.a` in the argument
-    /// that you pass.
-    ///
-    /// # Panics
-    ///
-    /// Panics if `output` is not formatted correctly or if one of the underlying
-    /// compiler commands fails. It can also panic if it fails reading file names
-    /// or creating directories.
-    pub fn compile(&self, output: &str) {
-        if let Err(e) = self.try_compile(output) {
-            fail(&e.message);
-        }
-    }
-
-    #[cfg(feature = "parallel")]
-    fn compile_objects(&self, objs: &[Object], print: &PrintThread) -> Result<(), Error> {
-        use std::sync::{mpsc, Once};
-
-        if objs.len() <= 1 {
-            for obj in objs {
-                let (mut cmd, name) = self.create_compile_object_cmd(obj)?;
-                run(&mut cmd, &name, print)?;
-            }
-
-            return Ok(());
-        }
-
-        // Limit our parallelism globally with a jobserver. Start off by
-        // releasing our own token for this process so we can have a bit of an
-        // easier to write loop below. If this fails, though, then we're likely
-        // on Windows with the main implicit token, so we just have a bit extra
-        // parallelism for a bit and don't reacquire later.
-        let server = jobserver();
-        // Reacquire our process's token on drop
-        let _reacquire = server.release_raw().ok().map(|_| JobserverToken(server));
-
-        // When compiling objects in parallel we do a few dirty tricks to speed
-        // things up:
-        //
-        // * First is that we use the `jobserver` crate to limit the parallelism
-        //   of this build script. The `jobserver` crate will use a jobserver
-        //   configured by Cargo for build scripts to ensure that parallelism is
-        //   coordinated across C compilations and Rust compilations. Before we
-        //   compile anything we make sure to wait until we acquire a token.
-        //
-        //   Note that this jobserver is cached globally so we only used one per
-        //   process and only worry about creating it once.
-        //
-        // * Next we use spawn the process to actually compile objects in
-        //   parallel after we've acquired a token to perform some work
-        //
-        // With all that in mind we compile all objects in a loop here, after we
-        // acquire the appropriate tokens, Once all objects have been compiled
-        // we wait on all the processes and propagate the results of compilation.
-
-        let (tx, rx) = mpsc::channel::<(_, String, KillOnDrop, _)>();
-
-        // Since jobserver::Client::acquire can block, waiting
-        // must be done in parallel so that acquire won't block forever.
-        let wait_thread = thread::Builder::new().spawn(move || {
-            let mut error = None;
-            let mut pendings = Vec::new();
-            // Buffer the stdout
-            let mut stdout = io::BufWriter::with_capacity(128, io::stdout());
-            let mut backoff_cnt = 0;
-
-            loop {
-                let mut has_made_progress = false;
-
-                // Reading new pending tasks
-                loop {
-                    match rx.try_recv() {
-                        Ok(pending) => {
-                            has_made_progress = true;
-                            pendings.push(pending)
-                        }
-                        Err(mpsc::TryRecvError::Disconnected) if pendings.is_empty() => {
-                            let _ = stdout.flush();
-                            return if let Some(err) = error {
-                                Err(err)
-                            } else {
-                                Ok(())
-                            };
-                        }
-                        _ => break,
-                    }
-                }
-
-                // Try waiting on them.
-                pendings.retain_mut(|(cmd, program, child, _)| {
-                    match try_wait_on_child(cmd, program, &mut child.0, &mut stdout) {
-                        Ok(Some(())) => {
-                            // Task done, remove the entry
-                            has_made_progress = true;
-                            false
-                        }
-                        Ok(None) => true, // Task still not finished, keep the entry
-                        Err(err) => {
-                            // Task fail, remove the entry.
-                            has_made_progress = true;
-
-                            // Since we can only return one error, log the error to make
-                            // sure users always see all the compilation failures.
-                            let _ = writeln!(stdout, "cargo:warning={}", err);
-                            error = Some(err);
-
-                            false
-                        }
-                    }
-                });
-
-                if !has_made_progress {
-                    if backoff_cnt > 3 {
-                        // We have yielded at least three times without making'
-                        // any progress, so we will sleep for a while.
-                        let duration =
-                            std::time::Duration::from_millis(100 * (backoff_cnt - 3).min(10));
-                        thread::sleep(duration);
-                    } else {
-                        // Given that we spawned a lot of compilation tasks, it is unlikely
-                        // that OS cannot find other ready task to execute.
-                        //
-                        // If all of them are done, then we will yield them and spawn more,
-                        // or simply returns.
-                        //
-                        // Thus this will not be turned into a busy-wait loop and it will not
-                        // waste CPU resource.
-                        thread::yield_now();
-                    }
-                }
-
-                backoff_cnt = if has_made_progress {
-                    0
-                } else {
-                    backoff_cnt + 1
-                };
-            }
-        })?;
-
-        for obj in objs {
-            let (mut cmd, program) = self.create_compile_object_cmd(obj)?;
-            let token = server.acquire()?;
-
-            let child = spawn(&mut cmd, &program, print.pipe_writer_cloned()?.unwrap())?;
-
-            tx.send((cmd, program, KillOnDrop(child), token))
-                .expect("Wait thread must be alive until all compilation jobs are done, otherwise we risk deadlock");
-        }
-        // Drop tx so that the wait_thread could return
-        drop(tx);
-
-        return wait_thread.join().expect("wait_thread panics");
-
-        /// Returns a suitable `jobserver::Client` used to coordinate
-        /// parallelism between build scripts.
-        fn jobserver() -> &'static jobserver::Client {
-            static INIT: Once = Once::new();
-            static mut JOBSERVER: Option<jobserver::Client> = None;
-
-            fn _assert_sync<T: Sync>() {}
-            _assert_sync::<jobserver::Client>();
-
-            unsafe {
-                INIT.call_once(|| {
-                    let server = default_jobserver();
-                    JOBSERVER = Some(server);
-                });
-                JOBSERVER.as_ref().unwrap()
-            }
-        }
-
-        unsafe fn default_jobserver() -> jobserver::Client {
-            // Try to use the environmental jobserver which Cargo typically
-            // initializes for us...
-            if let Some(client) = jobserver::Client::from_env() {
-                return client;
-            }
-
-            // ... but if that fails for whatever reason select something
-            // reasonable and crate a new jobserver. Use `NUM_JOBS` if set (it's
-            // configured by Cargo) and otherwise just fall back to a
-            // semi-reasonable number. Note that we could use `num_cpus` here
-            // but it's an extra dependency that will almost never be used, so
-            // it's generally not too worth it.
-            let mut parallelism = 4;
-            if let Ok(amt) = env::var("NUM_JOBS") {
-                if let Ok(amt) = amt.parse() {
-                    parallelism = amt;
-                }
-            }
-
-            // If we create our own jobserver then be sure to reserve one token
-            // for ourselves.
-            let client = jobserver::Client::new(parallelism).expect("failed to create jobserver");
-            client.acquire_raw().expect("failed to acquire initial");
-            return client;
-        }
-
-        struct KillOnDrop(Child);
-
-        impl Drop for KillOnDrop {
-            fn drop(&mut self) {
-                let child = &mut self.0;
-
-                child.kill().ok();
-            }
-        }
-
-        struct JobserverToken(&'static jobserver::Client);
-        impl Drop for JobserverToken {
-            fn drop(&mut self) {
-                let _ = self.0.acquire_raw();
-            }
-        }
-    }
-
-    #[cfg(not(feature = "parallel"))]
-    fn compile_objects(&self, objs: &[Object], print: &PrintThread) -> Result<(), Error> {
-        for obj in objs {
-            let (mut cmd, name) = self.create_compile_object_cmd(obj)?;
-            run(&mut cmd, &name, print)?;
-        }
-
-        Ok(())
-    }
-
-    fn create_compile_object_cmd(&self, obj: &Object) -> Result<(Command, String), Error> {
-        let asm_ext = AsmFileExt::from_path(&obj.src);
-        let is_asm = asm_ext.is_some();
-        let target = self.get_target()?;
-        let msvc = target.contains("msvc");
-        let compiler = self.try_get_compiler()?;
-        let clang = compiler.family == ToolFamily::Clang;
-        let gnu = compiler.family == ToolFamily::Gnu;
-
-        let (mut cmd, name) = if msvc && asm_ext == Some(AsmFileExt::DotAsm) {
-            self.msvc_macro_assembler()?
-        } else {
-            let mut cmd = compiler.to_command();
-            for &(ref a, ref b) in self.env.iter() {
-                cmd.env(a, b);
-            }
-            (
-                cmd,
-                compiler
-                    .path
-                    .file_name()
-                    .ok_or_else(|| Error::new(ErrorKind::IOError, "Failed to get compiler path."))?
-                    .to_string_lossy()
-                    .into_owned(),
-            )
-        };
-        let is_arm = target.contains("aarch64") || target.contains("arm");
-        command_add_output_file(
-            &mut cmd, &obj.dst, self.cuda, msvc, clang, gnu, is_asm, is_arm,
-        );
-        // armasm and armasm64 don't requrie -c option
-        if !msvc || !is_asm || !is_arm {
-            cmd.arg("-c");
-        }
-        if self.cuda && self.cuda_file_count() > 1 {
-            cmd.arg("--device-c");
-        }
-        if is_asm {
-            cmd.args(self.asm_flags.iter().map(std::ops::Deref::deref));
-        }
-        if compiler.family == (ToolFamily::Msvc { clang_cl: true }) && !is_asm {
-            // #513: For `clang-cl`, separate flags/options from the input file.
-            // When cross-compiling macOS -> Windows, this avoids interpreting
-            // common `/Users/...` paths as the `/U` flag and triggering
-            // `-Wslash-u-filename` warning.
-            cmd.arg("--");
-        }
-        cmd.arg(&obj.src);
-        if cfg!(target_os = "macos") {
-            self.fix_env_for_apple_os(&mut cmd)?;
-        }
-
-        Ok((cmd, name))
-    }
-
-    /// This will return a result instead of panicing; see expand() for the complete description.
-    pub fn try_expand(&self) -> Result<Vec<u8>, Error> {
-        let compiler = self.try_get_compiler()?;
-        let mut cmd = compiler.to_command();
-        for &(ref a, ref b) in self.env.iter() {
-            cmd.env(a, b);
-        }
-        cmd.arg("-E");
-
-        assert!(
-            self.files.len() <= 1,
-            "Expand may only be called for a single file"
-        );
-
-        cmd.args(self.files.iter().map(std::ops::Deref::deref));
-
-        let name = compiler
-            .path
-            .file_name()
-            .ok_or_else(|| Error::new(ErrorKind::IOError, "Failed to get compiler path."))?
-            .to_string_lossy()
-            .into_owned();
-
-        Ok(run_output(&mut cmd, &name)?)
-    }
-
-    /// Run the compiler, returning the macro-expanded version of the input files.
-    ///
-    /// This is only relevant for C and C++ files.
-    ///
-    /// # Panics
-    /// Panics if more than one file is present in the config, or if compiler
-    /// path has an invalid file name.
-    ///
-    /// # Example
-    /// ```no_run
-    /// let out = cc::Build::new().file("src/foo.c").expand();
-    /// ```
-    pub fn expand(&self) -> Vec<u8> {
-        match self.try_expand() {
-            Err(e) => fail(&e.message),
-            Ok(v) => v,
-        }
-    }
-
-    /// Get the compiler that's in use for this configuration.
-    ///
-    /// This function will return a `Tool` which represents the culmination
-    /// of this configuration at a snapshot in time. The returned compiler can
-    /// be inspected (e.g. the path, arguments, environment) to forward along to
-    /// other tools, or the `to_command` method can be used to invoke the
-    /// compiler itself.
-    ///
-    /// This method will take into account all configuration such as debug
-    /// information, optimization level, include directories, defines, etc.
-    /// Additionally, the compiler binary in use follows the standard
-    /// conventions for this path, e.g. looking at the explicitly set compiler,
-    /// environment variables (a number of which are inspected here), and then
-    /// falling back to the default configuration.
-    ///
-    /// # Panics
-    ///
-    /// Panics if an error occurred while determining the architecture.
-    pub fn get_compiler(&self) -> Tool {
-        match self.try_get_compiler() {
-            Ok(tool) => tool,
-            Err(e) => fail(&e.message),
-        }
-    }
-
-    /// Get the compiler that's in use for this configuration.
-    ///
-    /// This will return a result instead of panicing; see get_compiler() for the complete description.
-    pub fn try_get_compiler(&self) -> Result<Tool, Error> {
-        let opt_level = self.get_opt_level()?;
-        let target = self.get_target()?;
-
-        let mut cmd = self.get_base_compiler()?;
-
-        // Disable default flag generation via `no_default_flags` or environment variable
-        let no_defaults = self.no_default_flags || self.getenv("CRATE_CC_NO_DEFAULTS").is_some();
-
-        if !no_defaults {
-            self.add_default_flags(&mut cmd, &target, &opt_level)?;
-        } else {
-            println!("Info: default compiler flags are disabled");
-        }
-
-        if let Some(ref std) = self.std {
-            let separator = match cmd.family {
-                ToolFamily::Msvc { .. } => ':',
-                ToolFamily::Gnu | ToolFamily::Clang => '=',
-            };
-            cmd.push_cc_arg(format!("-std{}{}", separator, std).into());
-        }
-
-        if let Ok(flags) = self.envflags(if self.cpp { "CXXFLAGS" } else { "CFLAGS" }) {
-            for arg in flags {
-                cmd.push_cc_arg(arg.into());
-            }
-        }
-
-        for directory in self.include_directories.iter() {
-            cmd.args.push("-I".into());
-            cmd.args.push((**directory).into());
-        }
-
-        // If warnings and/or extra_warnings haven't been explicitly set,
-        // then we set them only if the environment doesn't already have
-        // CFLAGS/CXXFLAGS, since those variables presumably already contain
-        // the desired set of warnings flags.
-
-        if self
-            .warnings
-            .unwrap_or(if self.has_flags() { false } else { true })
-        {
-            let wflags = cmd.family.warnings_flags().into();
-            cmd.push_cc_arg(wflags);
-        }
-
-        if self
-            .extra_warnings
-            .unwrap_or(if self.has_flags() { false } else { true })
-        {
-            if let Some(wflags) = cmd.family.extra_warnings_flags() {
-                cmd.push_cc_arg(wflags.into());
-            }
-        }
-
-        for flag in self.flags.iter() {
-            cmd.args.push((**flag).into());
-        }
-
-        for flag in self.flags_supported.iter() {
-            if self.is_flag_supported(flag).unwrap_or(false) {
-                cmd.push_cc_arg((**flag).into());
-            }
-        }
-
-        for &(ref key, ref value) in self.definitions.iter() {
-            if let Some(ref value) = *value {
-                cmd.args.push(format!("-D{}={}", key, value).into());
-            } else {
-                cmd.args.push(format!("-D{}", key).into());
-            }
-        }
-
-        if self.warnings_into_errors {
-            let warnings_to_errors_flag = cmd.family.warnings_to_errors_flag().into();
-            cmd.push_cc_arg(warnings_to_errors_flag);
-        }
-
-        Ok(cmd)
-    }
-
-    fn add_default_flags(
-        &self,
-        cmd: &mut Tool,
-        target: &str,
-        opt_level: &str,
-    ) -> Result<(), Error> {
-        // Non-target flags
-        // If the flag is not conditioned on target variable, it belongs here :)
-        match cmd.family {
-            ToolFamily::Msvc { .. } => {
-                cmd.push_cc_arg("-nologo".into());
-
-                let crt_flag = match self.static_crt {
-                    Some(true) => "-MT",
-                    Some(false) => "-MD",
-                    None => {
-                        let features = self.getenv("CARGO_CFG_TARGET_FEATURE");
-                        let features = features.as_deref().unwrap_or_default();
-                        if features.contains("crt-static") {
-                            "-MT"
-                        } else {
-                            "-MD"
-                        }
-                    }
-                };
-                cmd.push_cc_arg(crt_flag.into());
-
-                match &opt_level[..] {
-                    // Msvc uses /O1 to enable all optimizations that minimize code size.
-                    "z" | "s" | "1" => cmd.push_opt_unless_duplicate("-O1".into()),
-                    // -O3 is a valid value for gcc and clang compilers, but not msvc. Cap to /O2.
-                    "2" | "3" => cmd.push_opt_unless_duplicate("-O2".into()),
-                    _ => {}
-                }
-            }
-            ToolFamily::Gnu | ToolFamily::Clang => {
-                // arm-linux-androideabi-gcc 4.8 shipped with Android NDK does
-                // not support '-Oz'
-                if opt_level == "z" && cmd.family != ToolFamily::Clang {
-                    cmd.push_opt_unless_duplicate("-Os".into());
-                } else {
-                    cmd.push_opt_unless_duplicate(format!("-O{}", opt_level).into());
-                }
-
-                if cmd.family == ToolFamily::Clang && target.contains("windows") {
-                    // Disambiguate mingw and msvc on Windows. Problem is that
-                    // depending on the origin clang can default to a mismatchig
-                    // run-time.
-                    cmd.push_cc_arg(format!("--target={}", target).into());
-                }
-
-                if cmd.family == ToolFamily::Clang && target.contains("android") {
-                    // For compatibility with code that doesn't use pre-defined `__ANDROID__` macro.
-                    // If compiler used via ndk-build or cmake (officially supported build methods)
-                    // this macros is defined.
-                    // See https://android.googlesource.com/platform/ndk/+/refs/heads/ndk-release-r21/build/cmake/android.toolchain.cmake#456
-                    // https://android.googlesource.com/platform/ndk/+/refs/heads/ndk-release-r21/build/core/build-binary.mk#141
-                    cmd.push_opt_unless_duplicate("-DANDROID".into());
-                }
-
-                if !target.contains("apple-ios") && !target.contains("apple-watchos") {
-                    cmd.push_cc_arg("-ffunction-sections".into());
-                    cmd.push_cc_arg("-fdata-sections".into());
-                }
-                // Disable generation of PIC on bare-metal for now: rust-lld doesn't support this yet
-                if self.pic.unwrap_or(
-                    !target.contains("windows")
-                        && !target.contains("-none-")
-                        && !target.contains("uefi"),
-                ) {
-                    cmd.push_cc_arg("-fPIC".into());
-                    // PLT only applies if code is compiled with PIC support,
-                    // and only for ELF targets.
-                    if target.contains("linux") && !self.use_plt.unwrap_or(true) {
-                        cmd.push_cc_arg("-fno-plt".into());
-                    }
-                }
-            }
-        }
-
-        if self.get_debug() {
-            if self.cuda {
-                // NVCC debug flag
-                cmd.args.push("-G".into());
-            }
-            let family = cmd.family;
-            family.add_debug_flags(cmd, self.get_dwarf_version());
-        }
-
-        if self.get_force_frame_pointer() {
-            let family = cmd.family;
-            family.add_force_frame_pointer(cmd);
-        }
-
-        // Target flags
-        match cmd.family {
-            ToolFamily::Clang => {
-                if !(target.contains("android")
-                    && android_clang_compiler_uses_target_arg_internally(&cmd.path))
-                {
-                    if target.contains("darwin") {
-                        if let Some(arch) =
-                            map_darwin_target_from_rust_to_compiler_architecture(target)
-                        {
-                            cmd.args
-                                .push(format!("--target={}-apple-darwin", arch).into());
-                        }
-                    } else if target.contains("macabi") {
-                        if let Some(arch) =
-                            map_darwin_target_from_rust_to_compiler_architecture(target)
-                        {
-                            cmd.args
-                                .push(format!("--target={}-apple-ios-macabi", arch).into());
-                        }
-                    } else if target.contains("ios-sim") {
-                        if let Some(arch) =
-                            map_darwin_target_from_rust_to_compiler_architecture(target)
-                        {
-                            let deployment_target = env::var("IPHONEOS_DEPLOYMENT_TARGET")
-                                .unwrap_or_else(|_| "7.0".into());
-                            cmd.args.push(
-                                format!(
-                                    "--target={}-apple-ios{}-simulator",
-                                    arch, deployment_target
-                                )
-                                .into(),
-                            );
-                        }
-                    } else if target.contains("watchos-sim") {
-                        if let Some(arch) =
-                            map_darwin_target_from_rust_to_compiler_architecture(target)
-                        {
-                            let deployment_target = env::var("WATCHOS_DEPLOYMENT_TARGET")
-                                .unwrap_or_else(|_| "5.0".into());
-                            cmd.args.push(
-                                format!(
-                                    "--target={}-apple-watchos{}-simulator",
-                                    arch, deployment_target
-                                )
-                                .into(),
-                            );
-                        }
-                    } else if target.starts_with("riscv64gc-") {
-                        cmd.args.push(
-                            format!("--target={}", target.replace("riscv64gc", "riscv64")).into(),
-                        );
-                    } else if target.starts_with("riscv32gc-") {
-                        cmd.args.push(
-                            format!("--target={}", target.replace("riscv32gc", "riscv32")).into(),
-                        );
-                    } else if target.contains("uefi") {
-                        if target.contains("x86_64") {
-                            cmd.args.push("--target=x86_64-unknown-windows-gnu".into());
-                        } else if target.contains("i686") {
-                            cmd.args.push("--target=i686-unknown-windows-gnu".into())
-                        } else if target.contains("aarch64") {
-                            cmd.args.push("--target=aarch64-unknown-windows-gnu".into())
-                        }
-                    } else if target.ends_with("-freebsd") {
-                        // FreeBSD only supports C++11 and above when compiling against libc++
-                        // (available from FreeBSD 10 onwards). Under FreeBSD, clang uses libc++ by
-                        // default on FreeBSD 10 and newer unless `--target` is manually passed to
-                        // the compiler, in which case its default behavior differs:
-                        // * If --target=xxx-unknown-freebsdX(.Y) is specified and X is greater than
-                        //   or equal to 10, clang++ uses libc++
-                        // * If --target=xxx-unknown-freebsd is specified (without a version),
-                        //   clang++ cannot assume libc++ is available and reverts to a default of
-                        //   libstdc++ (this behavior was changed in llvm 14).
-                        //
-                        // This breaks C++11 (or greater) builds if targeting FreeBSD with the
-                        // generic xxx-unknown-freebsd triple on clang 13 or below *without*
-                        // explicitly specifying that libc++ should be used.
-                        // When cross-compiling, we can't infer from the rust/cargo target triple
-                        // which major version of FreeBSD we are targeting, so we need to make sure
-                        // that libc++ is used (unless the user has explicitly specified otherwise).
-                        // There's no compelling reason to use a different approach when compiling
-                        // natively.
-                        if self.cpp && self.cpp_set_stdlib.is_none() {
-                            cmd.push_cc_arg("-stdlib=libc++".into());
-                        }
-
-                        cmd.push_cc_arg(format!("--target={}", target).into());
-                    } else {
-                        cmd.push_cc_arg(format!("--target={}", target).into());
-                    }
-                }
-            }
-            ToolFamily::Msvc { clang_cl } => {
-                // This is an undocumented flag from MSVC but helps with making
-                // builds more reproducible by avoiding putting timestamps into
-                // files.
-                cmd.push_cc_arg("-Brepro".into());
-
-                if clang_cl {
-                    if target.contains("x86_64") {
-                        cmd.push_cc_arg("-m64".into());
-                    } else if target.contains("86") {
-                        cmd.push_cc_arg("-m32".into());
-                        cmd.push_cc_arg("-arch:IA32".into());
-                    } else {
-                        cmd.push_cc_arg(format!("--target={}", target).into());
-                    }
-                } else {
-                    if target.contains("i586") {
-                        cmd.push_cc_arg("-arch:IA32".into());
-                    }
-                }
-
-                // There is a check in corecrt.h that will generate a
-                // compilation error if
-                // _ARM_WINAPI_PARTITION_DESKTOP_SDK_AVAILABLE is
-                // not defined to 1. The check was added in Windows
-                // 8 days because only store apps were allowed on ARM.
-                // This changed with the release of Windows 10 IoT Core.
-                // The check will be going away in future versions of
-                // the SDK, but for all released versions of the
-                // Windows SDK it is required.
-                if target.contains("arm") || target.contains("thumb") {
-                    cmd.args
-                        .push("-D_ARM_WINAPI_PARTITION_DESKTOP_SDK_AVAILABLE=1".into());
-                }
-            }
-            ToolFamily::Gnu => {
-                if target.contains("i686") || target.contains("i586") {
-                    cmd.args.push("-m32".into());
-                } else if target == "x86_64-unknown-linux-gnux32" {
-                    cmd.args.push("-mx32".into());
-                } else if target.contains("x86_64") || target.contains("powerpc64") {
-                    cmd.args.push("-m64".into());
-                }
-
-                if target.contains("darwin") {
-                    if let Some(arch) = map_darwin_target_from_rust_to_compiler_architecture(target)
-                    {
-                        cmd.args.push("-arch".into());
-                        cmd.args.push(arch.into());
-                    }
-                }
-
-                if target.contains("-kmc-solid_") {
-                    cmd.args.push("-finput-charset=utf-8".into());
-                }
-
-                if self.static_flag.is_none() {
-                    let features = self.getenv("CARGO_CFG_TARGET_FEATURE");
-                    let features = features.as_deref().unwrap_or_default();
-                    if features.contains("crt-static") {
-                        cmd.args.push("-static".into());
-                    }
-                }
-
-                // armv7 targets get to use armv7 instructions
-                if (target.starts_with("armv7") || target.starts_with("thumbv7"))
-                    && (target.contains("-linux-") || target.contains("-kmc-solid_"))
-                {
-                    cmd.args.push("-march=armv7-a".into());
-
-                    if target.ends_with("eabihf") {
-                        // lowest common denominator FPU
-                        cmd.args.push("-mfpu=vfpv3-d16".into());
-                    }
-                }
-
-                // (x86 Android doesn't say "eabi")
-                if target.contains("-androideabi") && target.contains("v7") {
-                    // -march=armv7-a handled above
-                    cmd.args.push("-mthumb".into());
-                    if !target.contains("neon") {
-                        // On android we can guarantee some extra float instructions
-                        // (specified in the android spec online)
-                        // NEON guarantees even more; see below.
-                        cmd.args.push("-mfpu=vfpv3-d16".into());
-                    }
-                    cmd.args.push("-mfloat-abi=softfp".into());
-                }
-
-                if target.contains("neon") {
-                    cmd.args.push("-mfpu=neon-vfpv4".into());
-                }
-
-                if target.starts_with("armv4t-unknown-linux-") {
-                    cmd.args.push("-march=armv4t".into());
-                    cmd.args.push("-marm".into());
-                    cmd.args.push("-mfloat-abi=soft".into());
-                }
-
-                if target.starts_with("armv5te-unknown-linux-") {
-                    cmd.args.push("-march=armv5te".into());
-                    cmd.args.push("-marm".into());
-                    cmd.args.push("-mfloat-abi=soft".into());
-                }
-
-                // For us arm == armv6 by default
-                if target.starts_with("arm-unknown-linux-") {
-                    cmd.args.push("-march=armv6".into());
-                    cmd.args.push("-marm".into());
-                    if target.ends_with("hf") {
-                        cmd.args.push("-mfpu=vfp".into());
-                    } else {
-                        cmd.args.push("-mfloat-abi=soft".into());
-                    }
-                }
-
-                // We can guarantee some settings for FRC
-                if target.starts_with("arm-frc-") {
-                    cmd.args.push("-march=armv7-a".into());
-                    cmd.args.push("-mcpu=cortex-a9".into());
-                    cmd.args.push("-mfpu=vfpv3".into());
-                    cmd.args.push("-mfloat-abi=softfp".into());
-                    cmd.args.push("-marm".into());
-                }
-
-                // Turn codegen down on i586 to avoid some instructions.
-                if target.starts_with("i586-unknown-linux-") {
-                    cmd.args.push("-march=pentium".into());
-                }
-
-                // Set codegen level for i686 correctly
-                if target.starts_with("i686-unknown-linux-") {
-                    cmd.args.push("-march=i686".into());
-                }
-
-                // Looks like `musl-gcc` makes it hard for `-m32` to make its way
-                // all the way to the linker, so we need to actually instruct the
-                // linker that we're generating 32-bit executables as well. This'll
-                // typically only be used for build scripts which transitively use
-                // these flags that try to compile executables.
-                if target == "i686-unknown-linux-musl" || target == "i586-unknown-linux-musl" {
-                    cmd.args.push("-Wl,-melf_i386".into());
-                }
-
-                if target.starts_with("thumb") {
-                    cmd.args.push("-mthumb".into());
-
-                    if target.ends_with("eabihf") {
-                        cmd.args.push("-mfloat-abi=hard".into())
-                    }
-                }
-                if target.starts_with("thumbv6m") {
-                    cmd.args.push("-march=armv6s-m".into());
-                }
-                if target.starts_with("thumbv7em") {
-                    cmd.args.push("-march=armv7e-m".into());
-
-                    if target.ends_with("eabihf") {
-                        cmd.args.push("-mfpu=fpv4-sp-d16".into())
-                    }
-                }
-                if target.starts_with("thumbv7m") {
-                    cmd.args.push("-march=armv7-m".into());
-                }
-                if target.starts_with("thumbv8m.base") {
-                    cmd.args.push("-march=armv8-m.base".into());
-                }
-                if target.starts_with("thumbv8m.main") {
-                    cmd.args.push("-march=armv8-m.main".into());
-
-                    if target.ends_with("eabihf") {
-                        cmd.args.push("-mfpu=fpv5-sp-d16".into())
-                    }
-                }
-                if target.starts_with("armebv7r") | target.starts_with("armv7r") {
-                    if target.starts_with("armeb") {
-                        cmd.args.push("-mbig-endian".into());
-                    } else {
-                        cmd.args.push("-mlittle-endian".into());
-                    }
-
-                    // ARM mode
-                    cmd.args.push("-marm".into());
-
-                    // R Profile
-                    cmd.args.push("-march=armv7-r".into());
-
-                    if target.ends_with("eabihf") {
-                        // Calling convention
-                        cmd.args.push("-mfloat-abi=hard".into());
-
-                        // lowest common denominator FPU
-                        // (see Cortex-R4 technical reference manual)
-                        cmd.args.push("-mfpu=vfpv3-d16".into())
-                    } else {
-                        // Calling convention
-                        cmd.args.push("-mfloat-abi=soft".into());
-                    }
-                }
-                if target.starts_with("armv7a") {
-                    cmd.args.push("-march=armv7-a".into());
-
-                    if target.ends_with("eabihf") {
-                        // lowest common denominator FPU
-                        cmd.args.push("-mfpu=vfpv3-d16".into());
-                    }
-                }
-                if target.starts_with("riscv32") || target.starts_with("riscv64") {
-                    // get the 32i/32imac/32imc/64gc/64imac/... part
-                    let mut parts = target.split('-');
-                    if let Some(arch) = parts.next() {
-                        let arch = &arch[5..];
-                        if target.contains("linux") && arch.starts_with("64") {
-                            cmd.args.push(("-march=rv64gc").into());
-                            cmd.args.push("-mabi=lp64d".into());
-                        } else if target.contains("freebsd") && arch.starts_with("64") {
-                            cmd.args.push(("-march=rv64gc").into());
-                            cmd.args.push("-mabi=lp64d".into());
-                        } else if target.contains("netbsd") && arch.starts_with("64") {
-                            cmd.args.push(("-march=rv64gc").into());
-                            cmd.args.push("-mabi=lp64d".into());
-                        } else if target.contains("openbsd") && arch.starts_with("64") {
-                            cmd.args.push(("-march=rv64gc").into());
-                            cmd.args.push("-mabi=lp64d".into());
-                        } else if target.contains("linux") && arch.starts_with("32") {
-                            cmd.args.push(("-march=rv32gc").into());
-                            cmd.args.push("-mabi=ilp32d".into());
-                        } else if arch.starts_with("64") {
-                            cmd.args.push(("-march=rv".to_owned() + arch).into());
-                            cmd.args.push("-mabi=lp64".into());
-                        } else {
-                            cmd.args.push(("-march=rv".to_owned() + arch).into());
-                            cmd.args.push("-mabi=ilp32".into());
-                        }
-                        cmd.args.push("-mcmodel=medany".into());
-                    }
-                }
-            }
-        }
-
-        if target.contains("apple-ios") || target.contains("apple-watchos") {
-            self.ios_watchos_flags(cmd)?;
-        }
-
-        if self.static_flag.unwrap_or(false) {
-            cmd.args.push("-static".into());
-        }
-        if self.shared_flag.unwrap_or(false) {
-            cmd.args.push("-shared".into());
-        }
-
-        if self.cpp {
-            match (self.cpp_set_stdlib.as_ref(), cmd.family) {
-                (None, _) => {}
-                (Some(stdlib), ToolFamily::Gnu) | (Some(stdlib), ToolFamily::Clang) => {
-                    cmd.push_cc_arg(format!("-stdlib=lib{}", stdlib).into());
-                }
-                _ => {
-                    println!(
-                        "cargo:warning=cpp_set_stdlib is specified, but the {:?} compiler \
-                         does not support this option, ignored",
-                        cmd.family
-                    );
-                }
-            }
-        }
-
-        Ok(())
-    }
-
-    fn has_flags(&self) -> bool {
-        let flags_env_var_name = if self.cpp { "CXXFLAGS" } else { "CFLAGS" };
-        let flags_env_var_value = self.getenv_with_target_prefixes(flags_env_var_name);
-        if let Ok(_) = flags_env_var_value {
-            true
-        } else {
-            false
-        }
-    }
-
-    fn msvc_macro_assembler(&self) -> Result<(Command, String), Error> {
-        let target = self.get_target()?;
-        let tool = if target.contains("x86_64") {
-            "ml64.exe"
-        } else if target.contains("arm") {
-            "armasm.exe"
-        } else if target.contains("aarch64") {
-            "armasm64.exe"
-        } else {
-            "ml.exe"
-        };
-        let mut cmd = windows_registry::find(&target, tool).unwrap_or_else(|| self.cmd(tool));
-        cmd.arg("-nologo"); // undocumented, yet working with armasm[64]
-        for directory in self.include_directories.iter() {
-            cmd.arg("-I").arg(&**directory);
-        }
-        if target.contains("aarch64") || target.contains("arm") {
-            if self.get_debug() {
-                cmd.arg("-g");
-            }
-
-            println!("cargo:warning=The MSVC ARM assemblers do not support -D flags");
-        } else {
-            if self.get_debug() {
-                cmd.arg("-Zi");
-            }
-
-            for &(ref key, ref value) in self.definitions.iter() {
-                if let Some(ref value) = *value {
-                    cmd.arg(&format!("-D{}={}", key, value));
-                } else {
-                    cmd.arg(&format!("-D{}", key));
-                }
-            }
-        }
-
-        if target.contains("i686") || target.contains("i586") {
-            cmd.arg("-safeseh");
-        }
-        for flag in self.flags.iter() {
-            cmd.arg(&**flag);
-        }
-
-        Ok((cmd, tool.to_string()))
-    }
-
-    fn assemble(
-        &self,
-        lib_name: &str,
-        dst: &Path,
-        objs: &[Object],
-        print: &PrintThread,
-    ) -> Result<(), Error> {
-        // Delete the destination if it exists as we want to
-        // create on the first iteration instead of appending.
-        let _ = fs::remove_file(dst);
-
-        // Add objects to the archive in limited-length batches. This helps keep
-        // the length of the command line within a reasonable length to avoid
-        // blowing system limits on limiting platforms like Windows.
-        let objs: Vec<_> = objs
-            .iter()
-            .map(|o| o.dst.as_path())
-            .chain(self.objects.iter().map(std::ops::Deref::deref))
-            .collect();
-        for chunk in objs.chunks(100) {
-            self.assemble_progressive(dst, chunk, print)?;
-        }
-
-        if self.cuda && self.cuda_file_count() > 0 {
-            // Link the device-side code and add it to the target library,
-            // so that non-CUDA linker can link the final binary.
-
-            let out_dir = self.get_out_dir()?;
-            let dlink = out_dir.join(lib_name.to_owned() + "_dlink.o");
-            let mut nvcc = self.get_compiler().to_command();
-            nvcc.arg("--device-link").arg("-o").arg(&dlink).arg(dst);
-            run(&mut nvcc, "nvcc", print)?;
-            self.assemble_progressive(dst, &[dlink.as_path()], print)?;
-        }
-
-        let target = self.get_target()?;
-        if target.contains("msvc") {
-            // The Rust compiler will look for libfoo.a and foo.lib, but the
-            // MSVC linker will also be passed foo.lib, so be sure that both
-            // exist for now.
-
-            let lib_dst = dst.with_file_name(format!("{}.lib", lib_name));
-            let _ = fs::remove_file(&lib_dst);
-            match fs::hard_link(&dst, &lib_dst).or_else(|_| {
-                // if hard-link fails, just copy (ignoring the number of bytes written)
-                fs::copy(&dst, &lib_dst).map(|_| ())
-            }) {
-                Ok(_) => (),
-                Err(_) => {
-                    return Err(Error::new(
-                        ErrorKind::IOError,
-                        "Could not copy or create a hard-link to the generated lib file.",
-                    ));
-                }
-            };
-        } else {
-            // Non-msvc targets (those using `ar`) need a separate step to add
-            // the symbol table to archives since our construction command of
-            // `cq` doesn't add it for us.
-            let (mut ar, cmd, _any_flags) = self.get_ar()?;
-
-            // NOTE: We add `s` even if flags were passed using $ARFLAGS/ar_flag, because `s`
-            // here represents a _mode_, not an arbitrary flag. Further discussion of this choice
-            // can be seen in https://github.com/rust-lang/cc-rs/pull/763.
-            run(ar.arg("s").arg(dst), &cmd, print)?;
-        }
-
-        Ok(())
-    }
-
-    fn assemble_progressive(
-        &self,
-        dst: &Path,
-        objs: &[&Path],
-        print: &PrintThread,
-    ) -> Result<(), Error> {
-        let target = self.get_target()?;
-
-        if target.contains("msvc") {
-            let (mut cmd, program, any_flags) = self.get_ar()?;
-            // NOTE: -out: here is an I/O flag, and so must be included even if $ARFLAGS/ar_flag is
-            // in use. -nologo on the other hand is just a regular flag, and one that we'll skip if
-            // the caller has explicitly dictated the flags they want. See
-            // https://github.com/rust-lang/cc-rs/pull/763 for further discussion.
-            let mut out = OsString::from("-out:");
-            out.push(dst);
-            cmd.arg(out);
-            if !any_flags {
-                cmd.arg("-nologo");
-            }
-            // If the library file already exists, add the library name
-            // as an argument to let lib.exe know we are appending the objs.
-            if dst.exists() {
-                cmd.arg(dst);
-            }
-            cmd.args(objs);
-            run(&mut cmd, &program, print)?;
-        } else {
-            let (mut ar, cmd, _any_flags) = self.get_ar()?;
-
-            // Set an environment variable to tell the OSX archiver to ensure
-            // that all dates listed in the archive are zero, improving
-            // determinism of builds. AFAIK there's not really official
-            // documentation of this but there's a lot of references to it if
-            // you search google.
-            //
-            // You can reproduce this locally on a mac with:
-            //
-            //      $ touch foo.c
-            //      $ cc -c foo.c -o foo.o
-            //
-            //      # Notice that these two checksums are different
-            //      $ ar crus libfoo1.a foo.o && sleep 2 && ar crus libfoo2.a foo.o
-            //      $ md5sum libfoo*.a
-            //
-            //      # Notice that these two checksums are the same
-            //      $ export ZERO_AR_DATE=1
-            //      $ ar crus libfoo1.a foo.o && sleep 2 && touch foo.o && ar crus libfoo2.a foo.o
-            //      $ md5sum libfoo*.a
-            //
-            // In any case if this doesn't end up getting read, it shouldn't
-            // cause that many issues!
-            ar.env("ZERO_AR_DATE", "1");
-
-            // NOTE: We add cq here regardless of whether $ARFLAGS/ar_flag have been used because
-            // it dictates the _mode_ ar runs in, which the setter of $ARFLAGS/ar_flag can't
-            // dictate. See https://github.com/rust-lang/cc-rs/pull/763 for further discussion.
-            run(ar.arg("cq").arg(dst).args(objs), &cmd, print)?;
-        }
-
-        Ok(())
-    }
-
-    fn ios_watchos_flags(&self, cmd: &mut Tool) -> Result<(), Error> {
-        enum ArchSpec {
-            Device(&'static str),
-            Simulator(&'static str),
-            Catalyst(&'static str),
-        }
-
-        enum Os {
-            Ios,
-            WatchOs,
-        }
-        impl Display for Os {
-            fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-                match self {
-                    Os::Ios => f.write_str("iOS"),
-                    Os::WatchOs => f.write_str("WatchOS"),
-                }
-            }
-        }
-
-        let target = self.get_target()?;
-        let os = if target.contains("-watchos") {
-            Os::WatchOs
-        } else {
-            Os::Ios
-        };
-
-        let arch = target.split('-').nth(0).ok_or_else(|| {
-            Error::new(
-                ErrorKind::ArchitectureInvalid,
-                format!("Unknown architecture for {} target.", os),
-            )
-        })?;
-
-        let is_catalyst = match target.split('-').nth(3) {
-            Some(v) => v == "macabi",
-            None => false,
-        };
-
-        let is_sim = match target.split('-').nth(3) {
-            Some(v) => v == "sim",
-            None => false,
-        };
-
-        let arch = if is_catalyst {
-            match arch {
-                "arm64e" => ArchSpec::Catalyst("arm64e"),
-                "arm64" | "aarch64" => ArchSpec::Catalyst("arm64"),
-                "x86_64" => ArchSpec::Catalyst("-m64"),
-                _ => {
-                    return Err(Error::new(
-                        ErrorKind::ArchitectureInvalid,
-                        "Unknown architecture for iOS target.",
-                    ));
-                }
-            }
-        } else if is_sim {
-            match arch {
-                "arm64" | "aarch64" => ArchSpec::Simulator("arm64"),
-                "x86_64" => ArchSpec::Simulator("-m64"),
-                _ => {
-                    return Err(Error::new(
-                        ErrorKind::ArchitectureInvalid,
-                        "Unknown architecture for iOS simulator target.",
-                    ));
-                }
-            }
-        } else {
-            match arch {
-                "arm" | "armv7" | "thumbv7" => ArchSpec::Device("armv7"),
-                "armv7k" => ArchSpec::Device("armv7k"),
-                "armv7s" | "thumbv7s" => ArchSpec::Device("armv7s"),
-                "arm64e" => ArchSpec::Device("arm64e"),
-                "arm64" | "aarch64" => ArchSpec::Device("arm64"),
-                "arm64_32" => ArchSpec::Device("arm64_32"),
-                "i386" | "i686" => ArchSpec::Simulator("-m32"),
-                "x86_64" => ArchSpec::Simulator("-m64"),
-                _ => {
-                    return Err(Error::new(
-                        ErrorKind::ArchitectureInvalid,
-                        format!("Unknown architecture for {} target.", os),
-                    ));
-                }
-            }
-        };
-
-        let (sdk_prefix, sim_prefix, min_version) = match os {
-            Os::Ios => (
-                "iphone",
-                "ios-",
-                std::env::var("IPHONEOS_DEPLOYMENT_TARGET").unwrap_or_else(|_| "7.0".into()),
-            ),
-            Os::WatchOs => (
-                "watch",
-                "watch",
-                std::env::var("WATCHOS_DEPLOYMENT_TARGET").unwrap_or_else(|_| "2.0".into()),
-            ),
-        };
-
-        let sdk = match arch {
-            ArchSpec::Device(arch) => {
-                cmd.args.push("-arch".into());
-                cmd.args.push(arch.into());
-                cmd.args
-                    .push(format!("-m{}os-version-min={}", sdk_prefix, min_version).into());
-                format!("{}os", sdk_prefix)
-            }
-            ArchSpec::Simulator(arch) => {
-                if arch.starts_with('-') {
-                    // -m32 or -m64
-                    cmd.args.push(arch.into());
-                } else {
-                    cmd.args.push("-arch".into());
-                    cmd.args.push(arch.into());
-                }
-                cmd.args
-                    .push(format!("-m{}simulator-version-min={}", sim_prefix, min_version).into());
-                format!("{}simulator", sdk_prefix)
-            }
-            ArchSpec::Catalyst(_) => "macosx".to_owned(),
-        };
-
-        self.print(&format_args!("Detecting {} SDK path for {}", os, sdk));
-        let sdk_path = if let Some(sdkroot) = env::var_os("SDKROOT") {
-            sdkroot
-        } else {
-            self.apple_sdk_root(sdk.as_str())?
-        };
-
-        cmd.args.push("-isysroot".into());
-        cmd.args.push(sdk_path);
-        // TODO: Remove this once Apple stops accepting apps built with Xcode 13
-        cmd.args.push("-fembed-bitcode".into());
-
-        Ok(())
-    }
-
-    fn cmd<P: AsRef<OsStr>>(&self, prog: P) -> Command {
-        let mut cmd = Command::new(prog);
-        for &(ref a, ref b) in self.env.iter() {
-            cmd.env(a, b);
-        }
-        cmd
-    }
-
-    fn get_base_compiler(&self) -> Result<Tool, Error> {
-        if let Some(c) = &self.compiler {
-            return Ok(Tool::new((**c).to_owned()));
-        }
-        let host = self.get_host()?;
-        let target = self.get_target()?;
-        let target = &*target;
-        let (env, msvc, gnu, traditional, clang) = if self.cpp {
-            ("CXX", "cl.exe", "g++", "c++", "clang++")
-        } else {
-            ("CC", "cl.exe", "gcc", "cc", "clang")
-        };
-
-        // On historical Solaris systems, "cc" may have been Sun Studio, which
-        // is not flag-compatible with "gcc".  This history casts a long shadow,
-        // and many modern illumos distributions today ship GCC as "gcc" without
-        // also making it available as "cc".
-        let default = if host.contains("solaris") || host.contains("illumos") {
-            gnu
-        } else {
-            traditional
-        };
-
-        let cl_exe = windows_registry::find_tool(&target, "cl.exe");
-
-        let tool_opt: Option<Tool> = self
-            .env_tool(env)
-            .map(|(tool, wrapper, args)| {
-                // find the driver mode, if any
-                const DRIVER_MODE: &str = "--driver-mode=";
-                let driver_mode = args
-                    .iter()
-                    .find(|a| a.starts_with(DRIVER_MODE))
-                    .map(|a| &a[DRIVER_MODE.len()..]);
-                // Chop off leading/trailing whitespace to work around
-                // semi-buggy build scripts which are shared in
-                // makefiles/configure scripts (where spaces are far more
-                // lenient)
-                let mut t = Tool::with_clang_driver(tool, driver_mode);
-                if let Some(cc_wrapper) = wrapper {
-                    t.cc_wrapper_path = Some(PathBuf::from(cc_wrapper));
-                }
-                for arg in args {
-                    t.cc_wrapper_args.push(arg.into());
-                }
-                t
-            })
-            .or_else(|| {
-                if target.contains("emscripten") {
-                    let tool = if self.cpp { "em++" } else { "emcc" };
-                    // Windows uses bat file so we have to be a bit more specific
-                    if cfg!(windows) {
-                        let mut t = Tool::new(PathBuf::from("cmd"));
-                        t.args.push("/c".into());
-                        t.args.push(format!("{}.bat", tool).into());
-                        Some(t)
-                    } else {
-                        Some(Tool::new(PathBuf::from(tool)))
-                    }
-                } else {
-                    None
-                }
-            })
-            .or_else(|| cl_exe.clone());
-
-        let tool = match tool_opt {
-            Some(t) => t,
-            None => {
-                let compiler = if host.contains("windows") && target.contains("windows") {
-                    if target.contains("msvc") {
-                        msvc.to_string()
-                    } else {
-                        let cc = if target.contains("llvm") { clang } else { gnu };
-                        format!("{}.exe", cc)
-                    }
-                } else if target.contains("apple-ios") {
-                    clang.to_string()
-                } else if target.contains("apple-watchos") {
-                    clang.to_string()
-                } else if target.contains("android") {
-                    autodetect_android_compiler(&target, &host, gnu, clang)
-                } else if target.contains("cloudabi") {
-                    format!("{}-{}", target, traditional)
-                } else if target == "wasm32-wasi"
-                    || target == "wasm32-unknown-wasi"
-                    || target == "wasm32-unknown-unknown"
-                {
-                    "clang".to_string()
-                } else if target.contains("vxworks") {
-                    if self.cpp {
-                        "wr-c++".to_string()
-                    } else {
-                        "wr-cc".to_string()
-                    }
-                } else if target.starts_with("armv7a-kmc-solid_") {
-                    format!("arm-kmc-eabi-{}", gnu)
-                } else if target.starts_with("aarch64-kmc-solid_") {
-                    format!("aarch64-kmc-elf-{}", gnu)
-                } else if &*self.get_host()? != target {
-                    let prefix = self.prefix_for_target(&target);
-                    match prefix {
-                        Some(prefix) => {
-                            let cc = if target.contains("llvm") { clang } else { gnu };
-                            format!("{}-{}", prefix, cc)
-                        }
-                        None => default.to_string(),
-                    }
-                } else {
-                    default.to_string()
-                };
-
-                let mut t = Tool::new(PathBuf::from(compiler));
-                if let Some(cc_wrapper) = Self::rustc_wrapper_fallback() {
-                    t.cc_wrapper_path = Some(PathBuf::from(cc_wrapper));
-                }
-                t
-            }
-        };
-
-        let mut tool = if self.cuda {
-            assert!(
-                tool.args.is_empty(),
-                "CUDA compilation currently assumes empty pre-existing args"
-            );
-            let nvcc = match self.getenv_with_target_prefixes("NVCC") {
-                Err(_) => PathBuf::from("nvcc"),
-                Ok(nvcc) => PathBuf::from(&*nvcc),
-            };
-            let mut nvcc_tool = Tool::with_features(nvcc, None, self.cuda);
-            nvcc_tool
-                .args
-                .push(format!("-ccbin={}", tool.path.display()).into());
-            nvcc_tool.family = tool.family;
-            nvcc_tool
-        } else {
-            tool
-        };
-
-        // New "standalone" C/C++ cross-compiler executables from recent Android NDK
-        // are just shell scripts that call main clang binary (from Android NDK) with
-        // proper `--target` argument.
-        //
-        // For example, armv7a-linux-androideabi16-clang passes
-        // `--target=armv7a-linux-androideabi16` to clang.
-        //
-        // As the shell script calls the main clang binary, the command line limit length
-        // on Windows is restricted to around 8k characters instead of around 32k characters.
-        // To remove this limit, we call the main clang binary directly and construct the
-        // `--target=` ourselves.
-        if host.contains("windows") && android_clang_compiler_uses_target_arg_internally(&tool.path)
-        {
-            if let Some(path) = tool.path.file_name() {
-                let file_name = path.to_str().unwrap().to_owned();
-                let (target, clang) = file_name.split_at(file_name.rfind("-").unwrap());
-
-                tool.path.set_file_name(clang.trim_start_matches("-"));
-                tool.path.set_extension("exe");
-                tool.args.push(format!("--target={}", target).into());
-
-                // Additionally, shell scripts for target i686-linux-android versions 16 to 24
-                // pass the `mstackrealign` option so we do that here as well.
-                if target.contains("i686-linux-android") {
-                    let (_, version) = target.split_at(target.rfind("d").unwrap() + 1);
-                    if let Ok(version) = version.parse::<u32>() {
-                        if version > 15 && version < 25 {
-                            tool.args.push("-mstackrealign".into());
-                        }
-                    }
-                }
-            };
-        }
-
-        // If we found `cl.exe` in our environment, the tool we're returning is
-        // an MSVC-like tool, *and* no env vars were set then set env vars for
-        // the tool that we're returning.
-        //
-        // Env vars are needed for things like `link.exe` being put into PATH as
-        // well as header include paths sometimes. These paths are automatically
-        // included by default but if the `CC` or `CXX` env vars are set these
-        // won't be used. This'll ensure that when the env vars are used to
-        // configure for invocations like `clang-cl` we still get a "works out
-        // of the box" experience.
-        if let Some(cl_exe) = cl_exe {
-            if tool.family == (ToolFamily::Msvc { clang_cl: true })
-                && tool.env.len() == 0
-                && target.contains("msvc")
-            {
-                for &(ref k, ref v) in cl_exe.env.iter() {
-                    tool.env.push((k.to_owned(), v.to_owned()));
-                }
-            }
-        }
-
-        if target.contains("msvc") && tool.family == ToolFamily::Gnu {
-            println!("cargo:warning=GNU compiler is not supported for this target");
-        }
-
-        Ok(tool)
-    }
-
-    /// Returns a fallback `cc_compiler_wrapper` by introspecting `RUSTC_WRAPPER`
-    fn rustc_wrapper_fallback() -> Option<String> {
-        // No explicit CC wrapper was detected, but check if RUSTC_WRAPPER
-        // is defined and is a build accelerator that is compatible with
-        // C/C++ compilers (e.g. sccache)
-        const VALID_WRAPPERS: &[&'static str] = &["sccache", "cachepot"];
-
-        let rustc_wrapper = std::env::var_os("RUSTC_WRAPPER")?;
-        let wrapper_path = Path::new(&rustc_wrapper);
-        let wrapper_stem = wrapper_path.file_stem()?;
-
-        if VALID_WRAPPERS.contains(&wrapper_stem.to_str()?) {
-            Some(rustc_wrapper.to_str()?.to_owned())
-        } else {
-            None
-        }
-    }
-
-    /// Returns compiler path, optional modifier name from whitelist, and arguments vec
-    fn env_tool(&self, name: &str) -> Option<(PathBuf, Option<String>, Vec<String>)> {
-        let tool = match self.getenv_with_target_prefixes(name) {
-            Ok(tool) => tool,
-            Err(_) => return None,
-        };
-
-        // If this is an exact path on the filesystem we don't want to do any
-        // interpretation at all, just pass it on through. This'll hopefully get
-        // us to support spaces-in-paths.
-        if Path::new(&*tool).exists() {
-            return Some((PathBuf::from(&*tool), None, Vec::new()));
-        }
-
-        // Ok now we want to handle a couple of scenarios. We'll assume from
-        // here on out that spaces are splitting separate arguments. Two major
-        // features we want to support are:
-        //
-        //      CC='sccache cc'
-        //
-        // aka using `sccache` or any other wrapper/caching-like-thing for
-        // compilations. We want to know what the actual compiler is still,
-        // though, because our `Tool` API support introspection of it to see
-        // what compiler is in use.
-        //
-        // additionally we want to support
-        //
-        //      CC='cc -flag'
-        //
-        // where the CC env var is used to also pass default flags to the C
-        // compiler.
-        //
-        // It's true that everything here is a bit of a pain, but apparently if
-        // you're not literally make or bash then you get a lot of bug reports.
-        let known_wrappers = ["ccache", "distcc", "sccache", "icecc", "cachepot"];
-
-        let mut parts = tool.split_whitespace();
-        let maybe_wrapper = match parts.next() {
-            Some(s) => s,
-            None => return None,
-        };
-
-        let file_stem = Path::new(maybe_wrapper)
-            .file_stem()
-            .unwrap()
-            .to_str()
-            .unwrap();
-        if known_wrappers.contains(&file_stem) {
-            if let Some(compiler) = parts.next() {
-                return Some((
-                    compiler.into(),
-                    Some(maybe_wrapper.to_string()),
-                    parts.map(|s| s.to_string()).collect(),
-                ));
-            }
-        }
-
-        Some((
-            maybe_wrapper.into(),
-            Self::rustc_wrapper_fallback(),
-            parts.map(|s| s.to_string()).collect(),
-        ))
-    }
-
-    /// Returns the C++ standard library:
-    /// 1. If [cpp_link_stdlib](cc::Build::cpp_link_stdlib) is set, uses its value.
-    /// 2. Else if the `CXXSTDLIB` environment variable is set, uses its value.
-    /// 3. Else the default is `libc++` for OS X and BSDs, `libc++_shared` for Android,
-    /// `None` for MSVC and `libstdc++` for anything else.
-    fn get_cpp_link_stdlib(&self) -> Result<Option<String>, Error> {
-        match &self.cpp_link_stdlib {
-            Some(s) => Ok(s.as_ref().map(|s| (*s).to_string())),
-            None => {
-                if let Ok(stdlib) = self.getenv_with_target_prefixes("CXXSTDLIB") {
-                    if stdlib.is_empty() {
-                        Ok(None)
-                    } else {
-                        Ok(Some(stdlib.to_string()))
-                    }
-                } else {
-                    let target = self.get_target()?;
-                    if target.contains("msvc") {
-                        Ok(None)
-                    } else if target.contains("apple") {
-                        Ok(Some("c++".to_string()))
-                    } else if target.contains("freebsd") {
-                        Ok(Some("c++".to_string()))
-                    } else if target.contains("openbsd") {
-                        Ok(Some("c++".to_string()))
-                    } else if target.contains("aix") {
-                        Ok(Some("c++".to_string()))
-                    } else if target.contains("android") {
-                        Ok(Some("c++_shared".to_string()))
-                    } else {
-                        Ok(Some("stdc++".to_string()))
-                    }
-                }
-            }
-        }
-    }
-
-    fn get_ar(&self) -> Result<(Command, String, bool), Error> {
-        self.try_get_archiver_and_flags()
-    }
-
-    /// Get the archiver (ar) that's in use for this configuration.
-    ///
-    /// You can use [`Command::get_program`] to get just the path to the command.
-    ///
-    /// This method will take into account all configuration such as debug
-    /// information, optimization level, include directories, defines, etc.
-    /// Additionally, the compiler binary in use follows the standard
-    /// conventions for this path, e.g. looking at the explicitly set compiler,
-    /// environment variables (a number of which are inspected here), and then
-    /// falling back to the default configuration.
-    ///
-    /// # Panics
-    ///
-    /// Panics if an error occurred while determining the architecture.
-    pub fn get_archiver(&self) -> Command {
-        match self.try_get_archiver() {
-            Ok(tool) => tool,
-            Err(e) => fail(&e.message),
-        }
-    }
-
-    /// Get the archiver that's in use for this configuration.
-    ///
-    /// This will return a result instead of panicing;
-    /// see [`get_archiver()`] for the complete description.
-    pub fn try_get_archiver(&self) -> Result<Command, Error> {
-        Ok(self.try_get_archiver_and_flags()?.0)
-    }
-
-    fn try_get_archiver_and_flags(&self) -> Result<(Command, String, bool), Error> {
-        let (mut cmd, name) = self.get_base_archiver()?;
-        let mut any_flags = false;
-        if let Ok(flags) = self.envflags("ARFLAGS") {
-            any_flags = any_flags | !flags.is_empty();
-            cmd.args(flags);
-        }
-        for flag in &self.ar_flags {
-            any_flags = true;
-            cmd.arg(&**flag);
-        }
-        Ok((cmd, name, any_flags))
-    }
-
-    fn get_base_archiver(&self) -> Result<(Command, String), Error> {
-        if let Some(ref a) = self.archiver {
-            return Ok((self.cmd(&**a), a.to_string_lossy().into_owned()));
-        }
-
-        self.get_base_archiver_variant("AR", "ar")
-    }
-
-    /// Get the ranlib that's in use for this configuration.
-    ///
-    /// You can use [`Command::get_program`] to get just the path to the command.
-    ///
-    /// This method will take into account all configuration such as debug
-    /// information, optimization level, include directories, defines, etc.
-    /// Additionally, the compiler binary in use follows the standard
-    /// conventions for this path, e.g. looking at the explicitly set compiler,
-    /// environment variables (a number of which are inspected here), and then
-    /// falling back to the default configuration.
-    ///
-    /// # Panics
-    ///
-    /// Panics if an error occurred while determining the architecture.
-    pub fn get_ranlib(&self) -> Command {
-        match self.try_get_ranlib() {
-            Ok(tool) => tool,
-            Err(e) => fail(&e.message),
-        }
-    }
-
-    /// Get the ranlib that's in use for this configuration.
-    ///
-    /// This will return a result instead of panicing;
-    /// see [`get_ranlib()`] for the complete description.
-    pub fn try_get_ranlib(&self) -> Result<Command, Error> {
-        let mut cmd = self.get_base_ranlib()?;
-        if let Ok(flags) = self.envflags("RANLIBFLAGS") {
-            cmd.args(flags);
-        }
-        Ok(cmd)
-    }
-
-    fn get_base_ranlib(&self) -> Result<Command, Error> {
-        if let Some(ref r) = self.ranlib {
-            return Ok(self.cmd(&**r));
-        }
-
-        Ok(self.get_base_archiver_variant("RANLIB", "ranlib")?.0)
-    }
-
-    fn get_base_archiver_variant(&self, env: &str, tool: &str) -> Result<(Command, String), Error> {
-        let target = self.get_target()?;
-        let mut name = String::new();
-        let tool_opt: Option<Command> = self
-            .env_tool(env)
-            .map(|(tool, _wrapper, args)| {
-                let mut cmd = self.cmd(tool);
-                cmd.args(args);
-                cmd
-            })
-            .or_else(|| {
-                if target.contains("emscripten") {
-                    // Windows use bat files so we have to be a bit more specific
-                    if cfg!(windows) {
-                        let mut cmd = self.cmd("cmd");
-                        name = format!("em{}.bat", tool);
-                        cmd.arg("/c").arg(&name);
-                        Some(cmd)
-                    } else {
-                        name = format!("em{}", tool);
-                        Some(self.cmd(&name))
-                    }
-                } else if target.starts_with("wasm32") {
-                    // Formally speaking one should be able to use this approach,
-                    // parsing -print-search-dirs output, to cover all clang targets,
-                    // including Android SDKs and other cross-compilation scenarios...
-                    // And even extend it to gcc targets by seaching for "ar" instead
-                    // of "llvm-ar"...
-                    let compiler = self.get_base_compiler().ok()?;
-                    if compiler.family == ToolFamily::Clang {
-                        name = format!("llvm-{}", tool);
-                        search_programs(&mut self.cmd(&compiler.path), &name)
-                            .map(|name| self.cmd(&name))
-                    } else {
-                        None
-                    }
-                } else {
-                    None
-                }
-            });
-
-        let default = tool.to_string();
-        let tool = match tool_opt {
-            Some(t) => t,
-            None => {
-                if target.contains("android") {
-                    name = format!("{}-{}", target.replace("armv7", "arm"), tool);
-                    self.cmd(&name)
-                } else if target.contains("msvc") {
-                    // NOTE: There isn't really a ranlib on msvc, so arguably we should return
-                    // `None` somehow here. But in general, callers will already have to be aware
-                    // of not running ranlib on Windows anyway, so it feels okay to return lib.exe
-                    // here.
-
-                    let compiler = self.get_base_compiler()?;
-                    let mut lib = String::new();
-                    if compiler.family == (ToolFamily::Msvc { clang_cl: true }) {
-                        // See if there is 'llvm-lib' next to 'clang-cl'
-                        // Another possibility could be to see if there is 'clang'
-                        // next to 'clang-cl' and use 'search_programs()' to locate
-                        // 'llvm-lib'. This is because 'clang-cl' doesn't support
-                        // the -print-search-dirs option.
-                        if let Some(mut cmd) = which(&compiler.path, None) {
-                            cmd.pop();
-                            cmd.push("llvm-lib.exe");
-                            if let Some(llvm_lib) = which(&cmd, None) {
-                                lib = llvm_lib.to_str().unwrap().to_owned();
-                            }
-                        }
-                    }
-
-                    if lib.is_empty() {
-                        name = String::from("lib.exe");
-                        match windows_registry::find(&target, "lib.exe") {
-                            Some(t) => t,
-                            None => self.cmd("lib.exe"),
-                        }
-                    } else {
-                        name = lib;
-                        self.cmd(&name)
-                    }
-                } else if target.contains("illumos") {
-                    // The default 'ar' on illumos uses a non-standard flags,
-                    // but the OS comes bundled with a GNU-compatible variant.
-                    //
-                    // Use the GNU-variant to match other Unix systems.
-                    name = format!("g{}", tool);
-                    self.cmd(&name)
-                } else if self.get_host()? != target {
-                    match self.prefix_for_target(&target) {
-                        Some(p) => {
-                            // GCC uses $target-gcc-ar, whereas binutils uses $target-ar -- try both.
-                            // Prefer -ar if it exists, as builds of `-gcc-ar` have been observed to be
-                            // outright broken (such as when targetting freebsd with `--disable-lto`
-                            // toolchain where the archiver attempts to load the LTO plugin anyway but
-                            // fails to find one).
-                            //
-                            // The same applies to ranlib.
-                            let mut chosen = default;
-                            for &infix in &["", "-gcc"] {
-                                let target_p = format!("{}{}-{}", p, infix, tool);
-                                if Command::new(&target_p).output().is_ok() {
-                                    chosen = target_p;
-                                    break;
-                                }
-                            }
-                            name = chosen;
-                            self.cmd(&name)
-                        }
-                        None => {
-                            name = default;
-                            self.cmd(&name)
-                        }
-                    }
-                } else {
-                    name = default;
-                    self.cmd(&name)
-                }
-            }
-        };
-
-        Ok((tool, name))
-    }
-
-    fn prefix_for_target(&self, target: &str) -> Option<String> {
-        // Put aside RUSTC_LINKER's prefix to be used as second choice, after CROSS_COMPILE
-        let linker_prefix = self
-            .getenv("RUSTC_LINKER")
-            .and_then(|var| var.strip_suffix("-gcc").map(str::to_string));
-        // CROSS_COMPILE is of the form: "arm-linux-gnueabi-"
-        let cc_env = self.getenv("CROSS_COMPILE");
-        let cross_compile = cc_env.as_ref().map(|s| s.trim_end_matches('-').to_owned());
-        cross_compile.or(linker_prefix).or(match &target[..] {
-            // Note: there is no `aarch64-pc-windows-gnu` target, only `-gnullvm`
-            "aarch64-pc-windows-gnullvm" => Some("aarch64-w64-mingw32"),
-            "aarch64-uwp-windows-gnu" => Some("aarch64-w64-mingw32"),
-            "aarch64-unknown-linux-gnu" => Some("aarch64-linux-gnu"),
-            "aarch64-unknown-linux-musl" => Some("aarch64-linux-musl"),
-            "aarch64-unknown-netbsd" => Some("aarch64--netbsd"),
-            "arm-unknown-linux-gnueabi" => Some("arm-linux-gnueabi"),
-            "armv4t-unknown-linux-gnueabi" => Some("arm-linux-gnueabi"),
-            "armv5te-unknown-linux-gnueabi" => Some("arm-linux-gnueabi"),
-            "armv5te-unknown-linux-musleabi" => Some("arm-linux-gnueabi"),
-            "arm-frc-linux-gnueabi" => Some("arm-frc-linux-gnueabi"),
-            "arm-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"),
-            "arm-unknown-linux-musleabi" => Some("arm-linux-musleabi"),
-            "arm-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"),
-            "arm-unknown-netbsd-eabi" => Some("arm--netbsdelf-eabi"),
-            "armv6-unknown-netbsd-eabihf" => Some("armv6--netbsdelf-eabihf"),
-            "armv7-unknown-linux-gnueabi" => Some("arm-linux-gnueabi"),
-            "armv7-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"),
-            "armv7-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"),
-            "armv7neon-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"),
-            "armv7neon-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"),
-            "thumbv7-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"),
-            "thumbv7-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"),
-            "thumbv7neon-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"),
-            "thumbv7neon-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"),
-            "armv7-unknown-netbsd-eabihf" => Some("armv7--netbsdelf-eabihf"),
-            "hexagon-unknown-linux-musl" => Some("hexagon-linux-musl"),
-            "i586-unknown-linux-musl" => Some("musl"),
-            "i686-pc-windows-gnu" => Some("i686-w64-mingw32"),
-            "i686-uwp-windows-gnu" => Some("i686-w64-mingw32"),
-            "i686-unknown-linux-gnu" => self.find_working_gnu_prefix(&[
-                "i686-linux-gnu",
-                "x86_64-linux-gnu", // transparently support gcc-multilib
-            ]), // explicit None if not found, so caller knows to fall back
-            "i686-unknown-linux-musl" => Some("musl"),
-            "i686-unknown-netbsd" => Some("i486--netbsdelf"),
-            "loongarch64-unknown-linux-gnu" => Some("loongarch64-linux-gnu"),
-            "mips-unknown-linux-gnu" => Some("mips-linux-gnu"),
-            "mips-unknown-linux-musl" => Some("mips-linux-musl"),
-            "mipsel-unknown-linux-gnu" => Some("mipsel-linux-gnu"),
-            "mipsel-unknown-linux-musl" => Some("mipsel-linux-musl"),
-            "mips64-unknown-linux-gnuabi64" => Some("mips64-linux-gnuabi64"),
-            "mips64el-unknown-linux-gnuabi64" => Some("mips64el-linux-gnuabi64"),
-            "mipsisa32r6-unknown-linux-gnu" => Some("mipsisa32r6-linux-gnu"),
-            "mipsisa32r6el-unknown-linux-gnu" => Some("mipsisa32r6el-linux-gnu"),
-            "mipsisa64r6-unknown-linux-gnuabi64" => Some("mipsisa64r6-linux-gnuabi64"),
-            "mipsisa64r6el-unknown-linux-gnuabi64" => Some("mipsisa64r6el-linux-gnuabi64"),
-            "powerpc-unknown-linux-gnu" => Some("powerpc-linux-gnu"),
-            "powerpc-unknown-linux-gnuspe" => Some("powerpc-linux-gnuspe"),
-            "powerpc-unknown-netbsd" => Some("powerpc--netbsd"),
-            "powerpc64-unknown-linux-gnu" => Some("powerpc-linux-gnu"),
-            "powerpc64le-unknown-linux-gnu" => Some("powerpc64le-linux-gnu"),
-            "riscv32i-unknown-none-elf" => self.find_working_gnu_prefix(&[
-                "riscv32-unknown-elf",
-                "riscv64-unknown-elf",
-                "riscv-none-embed",
-            ]),
-            "riscv32imac-unknown-none-elf" => self.find_working_gnu_prefix(&[
-                "riscv32-unknown-elf",
-                "riscv64-unknown-elf",
-                "riscv-none-embed",
-            ]),
-            "riscv32imac-unknown-xous-elf" => self.find_working_gnu_prefix(&[
-                "riscv32-unknown-elf",
-                "riscv64-unknown-elf",
-                "riscv-none-embed",
-            ]),
-            "riscv32imc-esp-espidf" => Some("riscv32-esp-elf"),
-            "riscv32imc-unknown-none-elf" => self.find_working_gnu_prefix(&[
-                "riscv32-unknown-elf",
-                "riscv64-unknown-elf",
-                "riscv-none-embed",
-            ]),
-            "riscv64gc-unknown-none-elf" => self.find_working_gnu_prefix(&[
-                "riscv64-unknown-elf",
-                "riscv32-unknown-elf",
-                "riscv-none-embed",
-            ]),
-            "riscv64imac-unknown-none-elf" => self.find_working_gnu_prefix(&[
-                "riscv64-unknown-elf",
-                "riscv32-unknown-elf",
-                "riscv-none-embed",
-            ]),
-            "riscv64gc-unknown-linux-gnu" => Some("riscv64-linux-gnu"),
-            "riscv32gc-unknown-linux-gnu" => Some("riscv32-linux-gnu"),
-            "riscv64gc-unknown-linux-musl" => Some("riscv64-linux-musl"),
-            "riscv32gc-unknown-linux-musl" => Some("riscv32-linux-musl"),
-            "riscv64gc-unknown-netbsd" => Some("riscv64--netbsd"),
-            "s390x-unknown-linux-gnu" => Some("s390x-linux-gnu"),
-            "sparc-unknown-linux-gnu" => Some("sparc-linux-gnu"),
-            "sparc64-unknown-linux-gnu" => Some("sparc64-linux-gnu"),
-            "sparc64-unknown-netbsd" => Some("sparc64--netbsd"),
-            "sparcv9-sun-solaris" => Some("sparcv9-sun-solaris"),
-            "armv7a-none-eabi" => Some("arm-none-eabi"),
-            "armv7a-none-eabihf" => Some("arm-none-eabi"),
-            "armebv7r-none-eabi" => Some("arm-none-eabi"),
-            "armebv7r-none-eabihf" => Some("arm-none-eabi"),
-            "armv7r-none-eabi" => Some("arm-none-eabi"),
-            "armv7r-none-eabihf" => Some("arm-none-eabi"),
-            "thumbv6m-none-eabi" => Some("arm-none-eabi"),
-            "thumbv7em-none-eabi" => Some("arm-none-eabi"),
-            "thumbv7em-none-eabihf" => Some("arm-none-eabi"),
-            "thumbv7m-none-eabi" => Some("arm-none-eabi"),
-            "thumbv8m.base-none-eabi" => Some("arm-none-eabi"),
-            "thumbv8m.main-none-eabi" => Some("arm-none-eabi"),
-            "thumbv8m.main-none-eabihf" => Some("arm-none-eabi"),
-            "x86_64-pc-windows-gnu" => Some("x86_64-w64-mingw32"),
-            "x86_64-pc-windows-gnullvm" => Some("x86_64-w64-mingw32"),
-            "x86_64-uwp-windows-gnu" => Some("x86_64-w64-mingw32"),
-            "x86_64-rumprun-netbsd" => Some("x86_64-rumprun-netbsd"),
-            "x86_64-unknown-linux-gnu" => self.find_working_gnu_prefix(&[
-                "x86_64-linux-gnu", // rustfmt wrap
-            ]), // explicit None if not found, so caller knows to fall back
-            "x86_64-unknown-linux-musl" => Some("musl"),
-            "x86_64-unknown-netbsd" => Some("x86_64--netbsd"),
-            _ => None,
-        }
-        .map(|x| x.to_owned()))
-    }
-
-    /// Some platforms have multiple, compatible, canonical prefixes. Look through
-    /// each possible prefix for a compiler that exists and return it. The prefixes
-    /// should be ordered from most-likely to least-likely.
-    fn find_working_gnu_prefix(&self, prefixes: &[&'static str]) -> Option<&'static str> {
-        let suffix = if self.cpp { "-g++" } else { "-gcc" };
-        let extension = std::env::consts::EXE_SUFFIX;
-
-        // Loop through PATH entries searching for each toolchain. This ensures that we
-        // are more likely to discover the toolchain early on, because chances are good
-        // that the desired toolchain is in one of the higher-priority paths.
-        env::var_os("PATH")
-            .as_ref()
-            .and_then(|path_entries| {
-                env::split_paths(path_entries).find_map(|path_entry| {
-                    for prefix in prefixes {
-                        let target_compiler = format!("{}{}{}", prefix, suffix, extension);
-                        if path_entry.join(&target_compiler).exists() {
-                            return Some(prefix);
-                        }
-                    }
-                    None
-                })
-            })
-            .map(|prefix| *prefix)
-            .or_else(||
-            // If no toolchain was found, provide the first toolchain that was passed in.
-            // This toolchain has been shown not to exist, however it will appear in the
-            // error that is shown to the user which should make it easier to search for
-            // where it should be obtained.
-            prefixes.first().map(|prefix| *prefix))
-    }
-
-    fn get_target(&self) -> Result<Arc<str>, Error> {
-        match &self.target {
-            Some(t) => Ok(t.clone()),
-            None => self.getenv_unwrap("TARGET"),
-        }
-    }
-
-    fn get_host(&self) -> Result<Arc<str>, Error> {
-        match &self.host {
-            Some(h) => Ok(h.clone()),
-            None => self.getenv_unwrap("HOST"),
-        }
-    }
-
-    fn get_opt_level(&self) -> Result<Arc<str>, Error> {
-        match &self.opt_level {
-            Some(ol) => Ok(ol.clone()),
-            None => self.getenv_unwrap("OPT_LEVEL"),
-        }
-    }
-
-    fn get_debug(&self) -> bool {
-        self.debug.unwrap_or_else(|| match self.getenv("DEBUG") {
-            Some(s) => &*s != "false",
-            None => false,
-        })
-    }
-
-    fn get_dwarf_version(&self) -> Option<u32> {
-        // Tentatively matches the DWARF version defaults as of rustc 1.62.
-        let target = self.get_target().ok()?;
-        if target.contains("android")
-            || target.contains("apple")
-            || target.contains("dragonfly")
-            || target.contains("freebsd")
-            || target.contains("netbsd")
-            || target.contains("openbsd")
-            || target.contains("windows-gnu")
-        {
-            Some(2)
-        } else if target.contains("linux") {
-            Some(4)
-        } else {
-            None
-        }
-    }
-
-    fn get_force_frame_pointer(&self) -> bool {
-        self.force_frame_pointer.unwrap_or_else(|| self.get_debug())
-    }
-
-    fn get_out_dir(&self) -> Result<Cow<'_, Path>, Error> {
-        match &self.out_dir {
-            Some(p) => Ok(Cow::Borrowed(&**p)),
-            None => env::var_os("OUT_DIR")
-                .map(PathBuf::from)
-                .map(Cow::Owned)
-                .ok_or_else(|| {
-                    Error::new(
-                        ErrorKind::EnvVarNotFound,
-                        "Environment variable OUT_DIR not defined.",
-                    )
-                }),
-        }
-    }
-
-    fn getenv(&self, v: &str) -> Option<Arc<str>> {
-        // Returns true for environment variables cargo sets for build scripts:
-        // https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-build-scripts
-        //
-        // This handles more of the vars than we actually use (it tries to check
-        // complete-ish set), just to avoid needing maintenance if/when new
-        // calls to `getenv`/`getenv_unwrap` are added.
-        fn provided_by_cargo(envvar: &str) -> bool {
-            match envvar {
-                v if v.starts_with("CARGO") || v.starts_with("RUSTC") => true,
-                "HOST" | "TARGET" | "RUSTDOC" | "OUT_DIR" | "OPT_LEVEL" | "DEBUG" | "PROFILE"
-                | "NUM_JOBS" | "RUSTFLAGS" => true,
-                _ => false,
-            }
-        }
-        let mut cache = self.env_cache.lock().unwrap();
-        if let Some(val) = cache.get(v) {
-            return val.clone();
-        }
-        if self.emit_rerun_if_env_changed && !provided_by_cargo(v) {
-            self.print(&format_args!("cargo:rerun-if-env-changed={}", v));
-        }
-        let r = env::var(v).ok().map(Arc::from);
-        self.print(&format_args!("{} = {:?}", v, r));
-        cache.insert(v.to_string(), r.clone());
-        r
-    }
-
-    fn getenv_unwrap(&self, v: &str) -> Result<Arc<str>, Error> {
-        match self.getenv(v) {
-            Some(s) => Ok(s),
-            None => Err(Error::new(
-                ErrorKind::EnvVarNotFound,
-                format!("Environment variable {} not defined.", v),
-            )),
-        }
-    }
-
-    fn getenv_with_target_prefixes(&self, var_base: &str) -> Result<Arc<str>, Error> {
-        let target = self.get_target()?;
-        let host = self.get_host()?;
-        let kind = if host == target { "HOST" } else { "TARGET" };
-        let target_u = target.replace("-", "_");
-        let res = self
-            .getenv(&format!("{}_{}", var_base, target))
-            .or_else(|| self.getenv(&format!("{}_{}", var_base, target_u)))
-            .or_else(|| self.getenv(&format!("{}_{}", kind, var_base)))
-            .or_else(|| self.getenv(var_base));
-
-        match res {
-            Some(res) => Ok(res),
-            None => Err(Error::new(
-                ErrorKind::EnvVarNotFound,
-                format!("Could not find environment variable {}.", var_base),
-            )),
-        }
-    }
-
-    fn envflags(&self, name: &str) -> Result<Vec<String>, Error> {
-        Ok(self
-            .getenv_with_target_prefixes(name)?
-            .split_ascii_whitespace()
-            .map(|slice| slice.to_string())
-            .collect())
-    }
-
-    fn print(&self, s: &dyn Display) {
-        if self.cargo_metadata {
-            println!("{}", s);
-        }
-    }
-
-    fn fix_env_for_apple_os(&self, cmd: &mut Command) -> Result<(), Error> {
-        let target = self.get_target()?;
-        let host = self.get_host()?;
-        if host.contains("apple-darwin") && target.contains("apple-darwin") {
-            // If, for example, `cargo` runs during the build of an XCode project, then `SDKROOT` environment variable
-            // would represent the current target, and this is the problem for us, if we want to compile something
-            // for the host, when host != target.
-            // We can not just remove `SDKROOT`, because, again, for example, XCode add to PATH
-            // /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
-            // and `cc` from this path can not find system include files, like `pthread.h`, if `SDKROOT`
-            // is not set
-            if let Ok(sdkroot) = env::var("SDKROOT") {
-                if !sdkroot.contains("MacOSX") {
-                    let macos_sdk = self.apple_sdk_root("macosx")?;
-                    cmd.env("SDKROOT", macos_sdk);
-                }
-            }
-            // Additionally, `IPHONEOS_DEPLOYMENT_TARGET` must not be set when using the Xcode linker at
-            // "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld",
-            // although this is apparently ignored when using the linker at "/usr/bin/ld".
-            cmd.env_remove("IPHONEOS_DEPLOYMENT_TARGET");
-        }
-        Ok(())
-    }
-
-    fn apple_sdk_root(&self, sdk: &str) -> Result<OsString, Error> {
-        let mut cache = self
-            .apple_sdk_root_cache
-            .lock()
-            .expect("apple_sdk_root_cache lock failed");
-        if let Some(ret) = cache.get(sdk) {
-            return Ok(ret.clone());
-        }
-
-        let sdk_path = run_output(
-            self.cmd("xcrun")
-                .arg("--show-sdk-path")
-                .arg("--sdk")
-                .arg(sdk),
-            "xcrun",
-        )?;
-
-        let sdk_path = match String::from_utf8(sdk_path) {
-            Ok(p) => p,
-            Err(_) => {
-                return Err(Error::new(
-                    ErrorKind::IOError,
-                    "Unable to determine Apple SDK path.",
-                ));
-            }
-        };
-        let ret: OsString = sdk_path.trim().into();
-        cache.insert(sdk.into(), ret.clone());
-        Ok(ret)
-    }
-
-    fn cuda_file_count(&self) -> usize {
-        self.files
-            .iter()
-            .filter(|file| file.extension() == Some(OsStr::new("cu")))
-            .count()
-    }
-}
-
-impl Default for Build {
-    fn default() -> Build {
-        Build::new()
-    }
-}
-
-impl Tool {
-    fn new(path: PathBuf) -> Self {
-        Tool::with_features(path, None, false)
-    }
-
-    fn with_clang_driver(path: PathBuf, clang_driver: Option<&str>) -> Self {
-        Self::with_features(path, clang_driver, false)
-    }
-
-    #[cfg(windows)]
-    /// Explicitly set the `ToolFamily`, skipping name-based detection.
-    fn with_family(path: PathBuf, family: ToolFamily) -> Self {
-        Self {
-            path: path,
-            cc_wrapper_path: None,
-            cc_wrapper_args: Vec::new(),
-            args: Vec::new(),
-            env: Vec::new(),
-            family: family,
-            cuda: false,
-            removed_args: Vec::new(),
-        }
-    }
-
-    fn with_features(path: PathBuf, clang_driver: Option<&str>, cuda: bool) -> Self {
-        // Try to detect family of the tool from its name, falling back to Gnu.
-        let family = if let Some(fname) = path.file_name().and_then(|p| p.to_str()) {
-            if fname.contains("clang-cl") {
-                ToolFamily::Msvc { clang_cl: true }
-            } else if fname.ends_with("cl") || fname == "cl.exe" {
-                ToolFamily::Msvc { clang_cl: false }
-            } else if fname.contains("clang") {
-                match clang_driver {
-                    Some("cl") => ToolFamily::Msvc { clang_cl: true },
-                    _ => ToolFamily::Clang,
-                }
-            } else {
-                ToolFamily::Gnu
-            }
-        } else {
-            ToolFamily::Gnu
-        };
-
-        Tool {
-            path: path,
-            cc_wrapper_path: None,
-            cc_wrapper_args: Vec::new(),
-            args: Vec::new(),
-            env: Vec::new(),
-            family: family,
-            cuda: cuda,
-            removed_args: Vec::new(),
-        }
-    }
-
-    /// Add an argument to be stripped from the final command arguments.
-    fn remove_arg(&mut self, flag: OsString) {
-        self.removed_args.push(flag);
-    }
-
-    /// Push an "exotic" flag to the end of the compiler's arguments list.
-    ///
-    /// Nvidia compiler accepts only the most common compiler flags like `-D`,
-    /// `-I`, `-c`, etc. Options meant specifically for the underlying
-    /// host C++ compiler have to be prefixed with '-Xcompiler`.
-    /// [Another possible future application for this function is passing
-    /// clang-specific flags to clang-cl, which otherwise accepts only
-    /// MSVC-specific options.]
-    fn push_cc_arg(&mut self, flag: OsString) {
-        if self.cuda {
-            self.args.push("-Xcompiler".into());
-        }
-        self.args.push(flag);
-    }
-
-    /// Checks if an argument or flag has already been specified or conflicts.
-    ///
-    /// Currently only checks optimization flags.
-    fn is_duplicate_opt_arg(&self, flag: &OsString) -> bool {
-        let flag = flag.to_str().unwrap();
-        let mut chars = flag.chars();
-
-        // Only duplicate check compiler flags
-        if self.is_like_msvc() {
-            if chars.next() != Some('/') {
-                return false;
-            }
-        } else if self.is_like_gnu() || self.is_like_clang() {
-            if chars.next() != Some('-') {
-                return false;
-            }
-        }
-
-        // Check for existing optimization flags (-O, /O)
-        if chars.next() == Some('O') {
-            return self
-                .args()
-                .iter()
-                .any(|ref a| a.to_str().unwrap_or("").chars().nth(1) == Some('O'));
-        }
-
-        // TODO Check for existing -m..., -m...=..., /arch:... flags
-        return false;
-    }
-
-    /// Don't push optimization arg if it conflicts with existing args.
-    fn push_opt_unless_duplicate(&mut self, flag: OsString) {
-        if self.is_duplicate_opt_arg(&flag) {
-            println!("Info: Ignoring duplicate arg {:?}", &flag);
-        } else {
-            self.push_cc_arg(flag);
-        }
-    }
-
-    /// Converts this compiler into a `Command` that's ready to be run.
-    ///
-    /// This is useful for when the compiler needs to be executed and the
-    /// command returned will already have the initial arguments and environment
-    /// variables configured.
-    pub fn to_command(&self) -> Command {
-        let mut cmd = match self.cc_wrapper_path {
-            Some(ref cc_wrapper_path) => {
-                let mut cmd = Command::new(&cc_wrapper_path);
-                cmd.arg(&self.path);
-                cmd
-            }
-            None => Command::new(&self.path),
-        };
-        cmd.args(&self.cc_wrapper_args);
-
-        let value = self
-            .args
-            .iter()
-            .filter(|a| !self.removed_args.contains(a))
-            .collect::<Vec<_>>();
-        cmd.args(&value);
-
-        for &(ref k, ref v) in self.env.iter() {
-            cmd.env(k, v);
-        }
-        cmd
-    }
-
-    /// Returns the path for this compiler.
-    ///
-    /// Note that this may not be a path to a file on the filesystem, e.g. "cc",
-    /// but rather something which will be resolved when a process is spawned.
-    pub fn path(&self) -> &Path {
-        &self.path
-    }
-
-    /// Returns the default set of arguments to the compiler needed to produce
-    /// executables for the target this compiler generates.
-    pub fn args(&self) -> &[OsString] {
-        &self.args
-    }
-
-    /// Returns the set of environment variables needed for this compiler to
-    /// operate.
-    ///
-    /// This is typically only used for MSVC compilers currently.
-    pub fn env(&self) -> &[(OsString, OsString)] {
-        &self.env
-    }
-
-    /// Returns the compiler command in format of CC environment variable.
-    /// Or empty string if CC env was not present
-    ///
-    /// This is typically used by configure script
-    pub fn cc_env(&self) -> OsString {
-        match self.cc_wrapper_path {
-            Some(ref cc_wrapper_path) => {
-                let mut cc_env = cc_wrapper_path.as_os_str().to_owned();
-                cc_env.push(" ");
-                cc_env.push(self.path.to_path_buf().into_os_string());
-                for arg in self.cc_wrapper_args.iter() {
-                    cc_env.push(" ");
-                    cc_env.push(arg);
-                }
-                cc_env
-            }
-            None => OsString::from(""),
-        }
-    }
-
-    /// Returns the compiler flags in format of CFLAGS environment variable.
-    /// Important here - this will not be CFLAGS from env, its internal gcc's flags to use as CFLAGS
-    /// This is typically used by configure script
-    pub fn cflags_env(&self) -> OsString {
-        let mut flags = OsString::new();
-        for (i, arg) in self.args.iter().enumerate() {
-            if i > 0 {
-                flags.push(" ");
-            }
-            flags.push(arg);
-        }
-        flags
-    }
-
-    /// Whether the tool is GNU Compiler Collection-like.
-    pub fn is_like_gnu(&self) -> bool {
-        self.family == ToolFamily::Gnu
-    }
-
-    /// Whether the tool is Clang-like.
-    pub fn is_like_clang(&self) -> bool {
-        self.family == ToolFamily::Clang
-    }
-
-    /// Whether the tool is MSVC-like.
-    pub fn is_like_msvc(&self) -> bool {
-        match self.family {
-            ToolFamily::Msvc { .. } => true,
-            _ => false,
-        }
-    }
-}
-
-fn wait_on_child(cmd: &Command, program: &str, child: &mut Child) -> Result<(), Error> {
-    let status = match child.wait() {
-        Ok(s) => s,
-        Err(e) => {
-            return Err(Error::new(
-                ErrorKind::ToolExecError,
-                format!(
-                    "Failed to wait on spawned child process, command {:?} with args {:?}: {}.",
-                    cmd, program, e
-                ),
-            ));
-        }
-    };
-    println!("{}", status);
-
-    if status.success() {
-        Ok(())
-    } else {
-        Err(Error::new(
-            ErrorKind::ToolExecError,
-            format!(
-                "Command {:?} with args {:?} did not execute successfully (status code {}).",
-                cmd, program, status
-            ),
-        ))
-    }
-}
-
-#[cfg(feature = "parallel")]
-fn try_wait_on_child(
-    cmd: &Command,
-    program: &str,
-    child: &mut Child,
-    stdout: &mut dyn io::Write,
-) -> Result<Option<()>, Error> {
-    match child.try_wait() {
-        Ok(Some(status)) => {
-            let _ = writeln!(stdout, "{}", status);
-
-            if status.success() {
-                Ok(Some(()))
-            } else {
-                Err(Error::new(
-                    ErrorKind::ToolExecError,
-                    format!(
-                        "Command {:?} with args {:?} did not execute successfully (status code {}).",
-                        cmd, program, status
-                    ),
-                ))
-            }
-        }
-        Ok(None) => Ok(None),
-        Err(e) => Err(Error::new(
-            ErrorKind::ToolExecError,
-            format!(
-                "Failed to wait on spawned child process, command {:?} with args {:?}: {}.",
-                cmd, program, e
-            ),
-        )),
-    }
-}
-
-fn run_inner(cmd: &mut Command, program: &str, pipe_writer: File) -> Result<(), Error> {
-    let mut child = spawn(cmd, program, pipe_writer)?;
-    wait_on_child(cmd, program, &mut child)
-}
-
-fn run(cmd: &mut Command, program: &str, print: &PrintThread) -> Result<(), Error> {
-    run_inner(cmd, program, print.pipe_writer_cloned()?.unwrap())?;
-
-    Ok(())
-}
-
-fn run_output(cmd: &mut Command, program: &str) -> Result<Vec<u8>, Error> {
-    cmd.stdout(Stdio::piped());
-
-    let mut print = PrintThread::new()?;
-    let mut child = spawn(cmd, program, print.pipe_writer().take().unwrap())?;
-
-    let mut stdout = vec![];
-    child
-        .stdout
-        .take()
-        .unwrap()
-        .read_to_end(&mut stdout)
-        .unwrap();
-
-    wait_on_child(cmd, program, &mut child)?;
-
-    Ok(stdout)
-}
-
-fn spawn(cmd: &mut Command, program: &str, pipe_writer: File) -> Result<Child, Error> {
-    struct ResetStderr<'cmd>(&'cmd mut Command);
-
-    impl Drop for ResetStderr<'_> {
-        fn drop(&mut self) {
-            // Reset stderr to default to release pipe_writer so that print thread will
-            // not block forever.
-            self.0.stderr(Stdio::inherit());
-        }
-    }
-
-    println!("running: {:?}", cmd);
-
-    let cmd = ResetStderr(cmd);
-
-    match cmd.0.stderr(pipe_writer).spawn() {
-        Ok(child) => Ok(child),
-        Err(ref e) if e.kind() == io::ErrorKind::NotFound => {
-            let extra = if cfg!(windows) {
-                " (see https://github.com/rust-lang/cc-rs#compile-time-requirements \
-                 for help)"
-            } else {
-                ""
-            };
-            Err(Error::new(
-                ErrorKind::ToolNotFound,
-                format!("Failed to find tool. Is `{}` installed?{}", program, extra),
-            ))
-        }
-        Err(e) => Err(Error::new(
-            ErrorKind::ToolExecError,
-            format!(
-                "Command {:?} with args {:?} failed to start: {:?}",
-                cmd.0, program, e
-            ),
-        )),
-    }
-}
-
-fn fail(s: &str) -> ! {
-    eprintln!("\n\nerror occurred: {}\n\n", s);
-    std::process::exit(1);
-}
-
-fn command_add_output_file(
-    cmd: &mut Command,
-    dst: &Path,
-    cuda: bool,
-    msvc: bool,
-    clang: bool,
-    gnu: bool,
-    is_asm: bool,
-    is_arm: bool,
-) {
-    if msvc && !clang && !gnu && !cuda && !(is_asm && is_arm) {
-        let mut s = OsString::from("-Fo");
-        s.push(&dst);
-        cmd.arg(s);
-    } else {
-        cmd.arg("-o").arg(&dst);
-    }
-}
-
-// Use by default minimum available API level
-// See note about naming here
-// https://android.googlesource.com/platform/ndk/+/refs/heads/ndk-release-r21/docs/BuildSystemMaintainers.md#Clang
-static NEW_STANDALONE_ANDROID_COMPILERS: [&str; 4] = [
-    "aarch64-linux-android21-clang",
-    "armv7a-linux-androideabi16-clang",
-    "i686-linux-android16-clang",
-    "x86_64-linux-android21-clang",
-];
-
-// New "standalone" C/C++ cross-compiler executables from recent Android NDK
-// are just shell scripts that call main clang binary (from Android NDK) with
-// proper `--target` argument.
-//
-// For example, armv7a-linux-androideabi16-clang passes
-// `--target=armv7a-linux-androideabi16` to clang.
-// So to construct proper command line check if
-// `--target` argument would be passed or not to clang
-fn android_clang_compiler_uses_target_arg_internally(clang_path: &Path) -> bool {
-    if let Some(filename) = clang_path.file_name() {
-        if let Some(filename_str) = filename.to_str() {
-            if let Some(idx) = filename_str.rfind("-") {
-                return filename_str.split_at(idx).0.contains("android");
-            }
-        }
-    }
-    false
-}
-
-#[test]
-fn test_android_clang_compiler_uses_target_arg_internally() {
-    for version in 16..21 {
-        assert!(android_clang_compiler_uses_target_arg_internally(
-            &PathBuf::from(format!("armv7a-linux-androideabi{}-clang", version))
-        ));
-        assert!(android_clang_compiler_uses_target_arg_internally(
-            &PathBuf::from(format!("armv7a-linux-androideabi{}-clang++", version))
-        ));
-    }
-    assert!(!android_clang_compiler_uses_target_arg_internally(
-        &PathBuf::from("clang-i686-linux-android")
-    ));
-    assert!(!android_clang_compiler_uses_target_arg_internally(
-        &PathBuf::from("clang")
-    ));
-    assert!(!android_clang_compiler_uses_target_arg_internally(
-        &PathBuf::from("clang++")
-    ));
-}
-
-fn autodetect_android_compiler(target: &str, host: &str, gnu: &str, clang: &str) -> String {
-    let new_clang_key = match target {
-        "aarch64-linux-android" => Some("aarch64"),
-        "armv7-linux-androideabi" => Some("armv7a"),
-        "i686-linux-android" => Some("i686"),
-        "x86_64-linux-android" => Some("x86_64"),
-        _ => None,
-    };
-
-    let new_clang = new_clang_key
-        .map(|key| {
-            NEW_STANDALONE_ANDROID_COMPILERS
-                .iter()
-                .find(|x| x.starts_with(key))
-        })
-        .unwrap_or(None);
-
-    if let Some(new_clang) = new_clang {
-        if Command::new(new_clang).output().is_ok() {
-            return (*new_clang).into();
-        }
-    }
-
-    let target = target
-        .replace("armv7neon", "arm")
-        .replace("armv7", "arm")
-        .replace("thumbv7neon", "arm")
-        .replace("thumbv7", "arm");
-    let gnu_compiler = format!("{}-{}", target, gnu);
-    let clang_compiler = format!("{}-{}", target, clang);
-
-    // On Windows, the Android clang compiler is provided as a `.cmd` file instead
-    // of a `.exe` file. `std::process::Command` won't run `.cmd` files unless the
-    // `.cmd` is explicitly appended to the command name, so we do that here.
-    let clang_compiler_cmd = format!("{}-{}.cmd", target, clang);
-
-    // Check if gnu compiler is present
-    // if not, use clang
-    if Command::new(&gnu_compiler).output().is_ok() {
-        gnu_compiler
-    } else if host.contains("windows") && Command::new(&clang_compiler_cmd).output().is_ok() {
-        clang_compiler_cmd
-    } else {
-        clang_compiler
-    }
-}
-
-// Rust and clang/cc don't agree on how to name the target.
-fn map_darwin_target_from_rust_to_compiler_architecture(target: &str) -> Option<&'static str> {
-    if target.contains("x86_64h") {
-        Some("x86_64h")
-    } else if target.contains("x86_64") {
-        Some("x86_64")
-    } else if target.contains("arm64e") {
-        Some("arm64e")
-    } else if target.contains("aarch64") {
-        Some("arm64")
-    } else if target.contains("i686") {
-        Some("i386")
-    } else if target.contains("powerpc") {
-        Some("ppc")
-    } else if target.contains("powerpc64") {
-        Some("ppc64")
-    } else {
-        None
-    }
-}
-
-fn which(tool: &Path, path_entries: Option<OsString>) -> Option<PathBuf> {
-    fn check_exe(exe: &mut PathBuf) -> bool {
-        let exe_ext = std::env::consts::EXE_EXTENSION;
-        exe.exists() || (!exe_ext.is_empty() && exe.set_extension(exe_ext) && exe.exists())
-    }
-
-    // If |tool| is not just one "word," assume it's an actual path...
-    if tool.components().count() > 1 {
-        let mut exe = PathBuf::from(tool);
-        return if check_exe(&mut exe) { Some(exe) } else { None };
-    }
-
-    // Loop through PATH entries searching for the |tool|.
-    let path_entries = path_entries.or(env::var_os("PATH"))?;
-    env::split_paths(&path_entries).find_map(|path_entry| {
-        let mut exe = path_entry.join(tool);
-        return if check_exe(&mut exe) { Some(exe) } else { None };
-    })
-}
-
-// search for |prog| on 'programs' path in '|cc| -print-search-dirs' output
-fn search_programs(cc: &mut Command, prog: &str) -> Option<PathBuf> {
-    let search_dirs = run_output(cc.arg("-print-search-dirs"), "cc").ok()?;
-    // clang driver appears to be forcing UTF-8 output even on Windows,
-    // hence from_utf8 is assumed to be usable in all cases.
-    let search_dirs = std::str::from_utf8(&search_dirs).ok()?;
-    for dirs in search_dirs.split(|c| c == '\r' || c == '\n') {
-        if let Some(path) = dirs.strip_prefix("programs: =") {
-            return which(Path::new(prog), Some(OsString::from(path)));
-        }
-    }
-    None
-}
-
-#[derive(Clone, Copy, PartialEq)]
-enum AsmFileExt {
-    /// `.asm` files. On MSVC targets, we assume these should be passed to MASM
-    /// (`ml{,64}.exe`).
-    DotAsm,
-    /// `.s` or `.S` files, which do not have the special handling on MSVC targets.
-    DotS,
-}
-
-impl AsmFileExt {
-    fn from_path(file: &Path) -> Option<Self> {
-        if let Some(ext) = file.extension() {
-            if let Some(ext) = ext.to_str() {
-                let ext = ext.to_lowercase();
-                match &*ext {
-                    "asm" => return Some(AsmFileExt::DotAsm),
-                    "s" => return Some(AsmFileExt::DotS),
-                    _ => return None,
-                }
-            }
-        }
-        None
-    }
-}
-
-struct PrintThread {
-    handle: Option<JoinHandle<()>>,
-    pipe_writer: Option<File>,
-}
-
-impl PrintThread {
-    fn new() -> Result<Self, Error> {
-        let (pipe_reader, pipe_writer) = os_pipe::pipe()?;
-
-        // Capture the standard error coming from compilation, and write it out
-        // with cargo:warning= prefixes. Note that this is a bit wonky to avoid
-        // requiring the output to be UTF-8, we instead just ship bytes from one
-        // location to another.
-        let print = thread::spawn(move || {
-            let mut stderr = BufReader::with_capacity(4096, pipe_reader);
-            let mut line = Vec::with_capacity(20);
-            let stdout = io::stdout();
-
-            // read_until returns 0 on Eof
-            while stderr.read_until(b'\n', &mut line).unwrap() != 0 {
-                {
-                    let mut stdout = stdout.lock();
-
-                    stdout.write_all(b"cargo:warning=").unwrap();
-                    stdout.write_all(&line).unwrap();
-                    stdout.write_all(b"\n").unwrap();
-                }
-
-                // read_until does not clear the buffer
-                line.clear();
-            }
-        });
-
-        Ok(Self {
-            handle: Some(print),
-            pipe_writer: Some(pipe_writer),
-        })
-    }
-
-    fn pipe_writer(&mut self) -> &mut Option<File> {
-        &mut self.pipe_writer
-    }
-
-    fn pipe_writer_cloned(&self) -> Result<Option<File>, Error> {
-        self.pipe_writer
-            .as_ref()
-            .map(File::try_clone)
-            .transpose()
-            .map_err(From::from)
-    }
-}
-
-impl Drop for PrintThread {
-    fn drop(&mut self) {
-        // Drop pipe_writer first to avoid deadlock
-        self.pipe_writer.take();
-
-        self.handle.take().unwrap().join().unwrap();
-    }
-}
diff --git a/vendor/cc/src/os_pipe.rs b/vendor/cc/src/os_pipe.rs
deleted file mode 100644
index 218c9bc..0000000
--- a/vendor/cc/src/os_pipe.rs
+++ /dev/null
@@ -1,28 +0,0 @@
-//! Adapted from:
-//!  - https://doc.rust-lang.org/src/std/sys/unix/pipe.rs.html
-//!  - https://doc.rust-lang.org/src/std/sys/unix/fd.rs.html#385
-//!  - https://github.com/rust-lang/rust/blob/master/library/std/src/sys/mod.rs#L57
-//!  - https://github.com/oconnor663/os_pipe.rs
-use std::fs::File;
-
-/// Open a new pipe and return a pair of [`File`] objects for the reader and writer.
-///
-/// This corresponds to the `pipe2` library call on Posix and the
-/// `CreatePipe` library call on Windows (though these implementation
-/// details might change). These pipes are non-inheritable, so new child
-/// processes won't receive a copy of them unless they're explicitly
-/// passed as stdin/stdout/stderr.
-pub fn pipe() -> std::io::Result<(File, File)> {
-    sys::pipe()
-}
-
-#[cfg(unix)]
-#[path = "os_pipe/unix.rs"]
-mod sys;
-
-#[cfg(windows)]
-#[path = "os_pipe/windows.rs"]
-mod sys;
-
-#[cfg(all(not(unix), not(windows)))]
-compile_error!("Only unix and windows support os_pipe!");
diff --git a/vendor/cc/src/os_pipe/unix.rs b/vendor/cc/src/os_pipe/unix.rs
deleted file mode 100644
index ec4e547..0000000
--- a/vendor/cc/src/os_pipe/unix.rs
+++ /dev/null
@@ -1,121 +0,0 @@
-use std::{
-    fs::File,
-    io,
-    os::{raw::c_int, unix::io::FromRawFd},
-};
-
-pub(super) fn pipe() -> io::Result<(File, File)> {
-    let mut fds = [0; 2];
-
-    // The only known way right now to create atomically set the CLOEXEC flag is
-    // to use the `pipe2` syscall. This was added to Linux in 2.6.27, glibc 2.9
-    // and musl 0.9.3, and some other targets also have it.
-    #[cfg(any(
-        target_os = "dragonfly",
-        target_os = "freebsd",
-        target_os = "linux",
-        target_os = "netbsd",
-        target_os = "openbsd",
-        target_os = "redox"
-    ))]
-    {
-        unsafe {
-            cvt(libc::pipe2(fds.as_mut_ptr(), libc::O_CLOEXEC))?;
-        }
-    }
-
-    #[cfg(not(any(
-        target_os = "dragonfly",
-        target_os = "freebsd",
-        target_os = "linux",
-        target_os = "netbsd",
-        target_os = "openbsd",
-        target_os = "redox"
-    )))]
-    {
-        unsafe {
-            cvt(libc::pipe(fds.as_mut_ptr()))?;
-        }
-
-        cloexec::set_cloexec(fds[0])?;
-        cloexec::set_cloexec(fds[1])?;
-    }
-
-    unsafe { Ok((File::from_raw_fd(fds[0]), File::from_raw_fd(fds[1]))) }
-}
-
-fn cvt(t: c_int) -> io::Result<c_int> {
-    if t == -1 {
-        Err(io::Error::last_os_error())
-    } else {
-        Ok(t)
-    }
-}
-
-#[cfg(not(any(
-    target_os = "dragonfly",
-    target_os = "freebsd",
-    target_os = "linux",
-    target_os = "netbsd",
-    target_os = "openbsd",
-    target_os = "redox"
-)))]
-mod cloexec {
-    use super::{c_int, cvt, io};
-
-    #[cfg(not(any(
-        target_env = "newlib",
-        target_os = "solaris",
-        target_os = "illumos",
-        target_os = "emscripten",
-        target_os = "fuchsia",
-        target_os = "l4re",
-        target_os = "linux",
-        target_os = "haiku",
-        target_os = "redox",
-        target_os = "vxworks",
-        target_os = "nto",
-    )))]
-    pub(super) fn set_cloexec(fd: c_int) -> io::Result<()> {
-        unsafe {
-            cvt(libc::ioctl(fd, libc::FIOCLEX))?;
-        }
-
-        Ok(())
-    }
-
-    #[cfg(any(
-        all(
-            target_env = "newlib",
-            not(any(target_os = "espidf", target_os = "horizon"))
-        ),
-        target_os = "solaris",
-        target_os = "illumos",
-        target_os = "emscripten",
-        target_os = "fuchsia",
-        target_os = "l4re",
-        target_os = "linux",
-        target_os = "haiku",
-        target_os = "redox",
-        target_os = "vxworks",
-        target_os = "nto",
-    ))]
-    pub(super) fn set_cloexec(fd: c_int) -> io::Result<()> {
-        unsafe {
-            let previous = cvt(libc::fcntl(fd, libc::F_GETFD))?;
-            let new = previous | libc::FD_CLOEXEC;
-            if new != previous {
-                cvt(libc::fcntl(fd, libc::F_SETFD, new))?;
-            }
-        }
-
-        Ok(())
-    }
-
-    // FD_CLOEXEC is not supported in ESP-IDF and Horizon OS but there's no need to,
-    // because neither supports spawning processes.
-    #[cfg(any(target_os = "espidf", target_os = "horizon"))]
-    pub(super) fn set_cloexec(_fd: c_int) -> io::Result<()> {
-        Ok(())
-    }
-}
diff --git a/vendor/cc/src/os_pipe/windows.rs b/vendor/cc/src/os_pipe/windows.rs
deleted file mode 100644
index 212632e..0000000
--- a/vendor/cc/src/os_pipe/windows.rs
+++ /dev/null
@@ -1,24 +0,0 @@
-use crate::windows_sys::{CreatePipe, INVALID_HANDLE_VALUE};
-use std::{fs::File, io, os::windows::prelude::*, ptr};
-
-/// NOTE: These pipes do not support IOCP.
-///
-/// If IOCP is needed, then you might want to emulate
-/// anonymous pipes with CreateNamedPipe, as Rust's stdlib does.
-pub(super) fn pipe() -> io::Result<(File, File)> {
-    let mut read_pipe = INVALID_HANDLE_VALUE;
-    let mut write_pipe = INVALID_HANDLE_VALUE;
-
-    let ret = unsafe { CreatePipe(&mut read_pipe, &mut write_pipe, ptr::null_mut(), 0) };
-
-    if ret == 0 {
-        Err(io::Error::last_os_error())
-    } else {
-        unsafe {
-            Ok((
-                File::from_raw_handle(read_pipe as RawHandle),
-                File::from_raw_handle(write_pipe as RawHandle),
-            ))
-        }
-    }
-}
diff --git a/vendor/cc/src/registry.rs b/vendor/cc/src/registry.rs
deleted file mode 100644
index 7c1c2dd..0000000
--- a/vendor/cc/src/registry.rs
+++ /dev/null
@@ -1,190 +0,0 @@
-// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use crate::windows_sys::{
-    RegCloseKey, RegEnumKeyExW, RegOpenKeyExW, RegQueryValueExW, ERROR_NO_MORE_ITEMS,
-    ERROR_SUCCESS, HKEY, HKEY_LOCAL_MACHINE, KEY_READ, KEY_WOW64_32KEY, REG_SZ,
-};
-use std::{
-    ffi::{OsStr, OsString},
-    io,
-    ops::RangeFrom,
-    os::windows::prelude::*,
-    ptr::null_mut,
-};
-
-/// Must never be `HKEY_PERFORMANCE_DATA`.
-pub(crate) struct RegistryKey(Repr);
-
-type DWORD = u32;
-
-struct OwnedKey(HKEY);
-
-/// Note: must not encode `HKEY_PERFORMANCE_DATA` or one of its subkeys.
-enum Repr {
-    /// `HKEY_LOCAL_MACHINE`.
-    LocalMachine,
-    /// A subkey of `HKEY_LOCAL_MACHINE`.
-    Owned(OwnedKey),
-}
-
-pub struct Iter<'a> {
-    idx: RangeFrom<DWORD>,
-    key: &'a RegistryKey,
-}
-
-unsafe impl Sync for Repr {}
-unsafe impl Send for Repr {}
-
-pub(crate) const LOCAL_MACHINE: RegistryKey = RegistryKey(Repr::LocalMachine);
-
-impl RegistryKey {
-    fn raw(&self) -> HKEY {
-        match self.0 {
-            Repr::LocalMachine => HKEY_LOCAL_MACHINE,
-            Repr::Owned(ref val) => val.0,
-        }
-    }
-
-    /// Open a sub-key of `self`.
-    pub fn open(&self, key: &OsStr) -> io::Result<RegistryKey> {
-        let key = key.encode_wide().chain(Some(0)).collect::<Vec<_>>();
-        let mut ret = null_mut();
-        let err = unsafe {
-            RegOpenKeyExW(
-                self.raw(),
-                key.as_ptr(),
-                0,
-                KEY_READ | KEY_WOW64_32KEY,
-                &mut ret,
-            )
-        };
-        if err == ERROR_SUCCESS {
-            Ok(RegistryKey(Repr::Owned(OwnedKey(ret))))
-        } else {
-            Err(io::Error::from_raw_os_error(err as i32))
-        }
-    }
-
-    pub fn iter(&self) -> Iter {
-        Iter {
-            idx: 0..,
-            key: self,
-        }
-    }
-
-    pub fn query_str(&self, name: &str) -> io::Result<OsString> {
-        let name: &OsStr = name.as_ref();
-        let name = name.encode_wide().chain(Some(0)).collect::<Vec<_>>();
-        let mut len = 0;
-        let mut kind = 0;
-        unsafe {
-            let err = RegQueryValueExW(
-                self.raw(),
-                name.as_ptr(),
-                null_mut(),
-                &mut kind,
-                null_mut(),
-                &mut len,
-            );
-            if err != ERROR_SUCCESS {
-                return Err(io::Error::from_raw_os_error(err as i32));
-            }
-            if kind != REG_SZ {
-                return Err(io::Error::new(
-                    io::ErrorKind::Other,
-                    "registry key wasn't a string",
-                ));
-            }
-
-            // The length here is the length in bytes, but we're using wide
-            // characters so we need to be sure to halve it for the length
-            // passed in.
-            assert!(len % 2 == 0, "impossible wide string size: {} bytes", len);
-            let vlen = len as usize / 2;
-            // Defensively initialized, see comment about
-            // `HKEY_PERFORMANCE_DATA` below.
-            let mut v = vec![0u16; vlen];
-            let err = RegQueryValueExW(
-                self.raw(),
-                name.as_ptr(),
-                null_mut(),
-                null_mut(),
-                v.as_mut_ptr() as *mut _,
-                &mut len,
-            );
-            // We don't check for `ERROR_MORE_DATA` (which would if the value
-            // grew between the first and second call to `RegQueryValueExW`),
-            // both because it's extremely unlikely, and this is a bit more
-            // defensive more defensive against weird types of registry keys.
-            if err != ERROR_SUCCESS {
-                return Err(io::Error::from_raw_os_error(err as i32));
-            }
-            // The length is allowed to change, but should still be even, as
-            // well as smaller.
-            assert!(len % 2 == 0, "impossible wide string size: {} bytes", len);
-            // If the length grew but returned a success code, it *probably*
-            // indicates we're `HKEY_PERFORMANCE_DATA` or a subkey(?). We
-            // consider this UB, since those keys write "undefined" or
-            // "unpredictable" values to len, and need to use a completely
-            // different loop structure. This should be impossible (and enforce
-            // it in the API to the best of our ability), but to mitigate the
-            // damage we do some smoke-checks on the len, and ensure `v` has
-            // been fully initialized (rather than trusting the result of
-            // `RegQueryValueExW`).
-            let actual_len = len as usize / 2;
-            assert!(actual_len <= v.len());
-            v.truncate(actual_len);
-            // Some registry keys may have a terminating nul character, but
-            // we're not interested in that, so chop it off if it's there.
-            if !v.is_empty() && v[v.len() - 1] == 0 {
-                v.pop();
-            }
-            return Ok(OsString::from_wide(&v));
-        }
-    }
-}
-
-impl Drop for OwnedKey {
-    fn drop(&mut self) {
-        unsafe {
-            RegCloseKey(self.0);
-        }
-    }
-}
-
-impl<'a> Iterator for Iter<'a> {
-    type Item = io::Result<OsString>;
-
-    fn next(&mut self) -> Option<io::Result<OsString>> {
-        self.idx.next().and_then(|i| unsafe {
-            let mut v = Vec::with_capacity(256);
-            let mut len = v.capacity() as DWORD;
-            let ret = RegEnumKeyExW(
-                self.key.raw(),
-                i,
-                v.as_mut_ptr(),
-                &mut len,
-                null_mut(),
-                null_mut(),
-                null_mut(),
-                null_mut(),
-            );
-            if ret == ERROR_NO_MORE_ITEMS {
-                None
-            } else if ret != ERROR_SUCCESS {
-                Some(Err(io::Error::from_raw_os_error(ret as i32)))
-            } else {
-                v.set_len(len as usize);
-                Some(Ok(OsString::from_wide(&v)))
-            }
-        })
-    }
-}
diff --git a/vendor/cc/src/setup_config.rs b/vendor/cc/src/setup_config.rs
deleted file mode 100644
index fe2c030..0000000
--- a/vendor/cc/src/setup_config.rs
+++ /dev/null
@@ -1,283 +0,0 @@
-// Copyright © 2017 winapi-rs developers
-// Licensed under the Apache License, Version 2.0
-// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
-// All files in the project carrying such notice may not be copied, modified, or distributed
-// except according to those terms.
-
-#![allow(bad_style)]
-#![allow(unused)]
-
-use crate::{
-    com::{BStr, ComPtr},
-    winapi::{
-        IUnknown, IUnknownVtbl, Interface, LCID, LPCOLESTR, LPCWSTR, LPFILETIME, LPSAFEARRAY,
-        PULONGLONG, ULONG,
-    },
-    windows_sys::{CoCreateInstance, BSTR, CLSCTX_ALL, HRESULT, S_FALSE},
-};
-
-use std::{
-    ffi::OsString,
-    ptr::{null, null_mut},
-};
-
-// Bindings to the Setup.Configuration stuff
-pub type InstanceState = u32;
-
-pub const eNone: InstanceState = 0;
-pub const eLocal: InstanceState = 1;
-pub const eRegistered: InstanceState = 2;
-pub const eNoRebootRequired: InstanceState = 4;
-pub const eComplete: InstanceState = -1i32 as u32;
-
-RIDL! {#[uuid(0xb41463c3, 0x8866, 0x43b5, 0xbc, 0x33, 0x2b, 0x06, 0x76, 0xf7, 0xf4, 0x2e)]
-interface ISetupInstance(ISetupInstanceVtbl): IUnknown(IUnknownVtbl) {
-    fn GetInstanceId(
-        pbstrInstanceId: *mut BSTR,
-    ) -> HRESULT,
-    fn GetInstallDate(
-        pInstallDate: LPFILETIME,
-    ) -> HRESULT,
-    fn GetInstallationName(
-        pbstrInstallationName: *mut BSTR,
-    ) -> HRESULT,
-    fn GetInstallationPath(
-        pbstrInstallationPath: *mut BSTR,
-    ) -> HRESULT,
-    fn GetInstallationVersion(
-        pbstrInstallationVersion: *mut BSTR,
-    ) -> HRESULT,
-    fn GetDisplayName(
-        lcid: LCID,
-        pbstrDisplayName: *mut BSTR,
-    ) -> HRESULT,
-    fn GetDescription(
-        lcid: LCID,
-        pbstrDescription: *mut BSTR,
-    ) -> HRESULT,
-    fn ResolvePath(
-        pwszRelativePath: LPCOLESTR,
-        pbstrAbsolutePath: *mut BSTR,
-    ) -> HRESULT,
-}}
-
-RIDL! {#[uuid(0x89143c9a, 0x05af, 0x49b0, 0xb7, 0x17, 0x72, 0xe2, 0x18, 0xa2, 0x18, 0x5c)]
-interface ISetupInstance2(ISetupInstance2Vtbl): ISetupInstance(ISetupInstanceVtbl) {
-    fn GetState(
-        pState: *mut InstanceState,
-    ) -> HRESULT,
-    fn GetPackages(
-        ppsaPackages: *mut LPSAFEARRAY,
-    ) -> HRESULT,
-    fn GetProduct(
-        ppPackage: *mut *mut ISetupPackageReference,
-    ) -> HRESULT,
-    fn GetProductPath(
-        pbstrProductPath: *mut BSTR,
-    ) -> HRESULT,
-}}
-
-RIDL! {#[uuid(0x6380bcff, 0x41d3, 0x4b2e, 0x8b, 0x2e, 0xbf, 0x8a, 0x68, 0x10, 0xc8, 0x48)]
-interface IEnumSetupInstances(IEnumSetupInstancesVtbl): IUnknown(IUnknownVtbl) {
-    fn Next(
-        celt: ULONG,
-        rgelt: *mut *mut ISetupInstance,
-        pceltFetched: *mut ULONG,
-    ) -> HRESULT,
-    fn Skip(
-        celt: ULONG,
-    ) -> HRESULT,
-    fn Reset() -> HRESULT,
-    fn Clone(
-        ppenum: *mut *mut IEnumSetupInstances,
-    ) -> HRESULT,
-}}
-
-RIDL! {#[uuid(0x42843719, 0xdb4c, 0x46c2, 0x8e, 0x7c, 0x64, 0xf1, 0x81, 0x6e, 0xfd, 0x5b)]
-interface ISetupConfiguration(ISetupConfigurationVtbl): IUnknown(IUnknownVtbl) {
-    fn EnumInstances(
-        ppEnumInstances: *mut *mut IEnumSetupInstances,
-    ) -> HRESULT,
-    fn GetInstanceForCurrentProcess(
-        ppInstance: *mut *mut ISetupInstance,
-    ) -> HRESULT,
-    fn GetInstanceForPath(
-        wzPath: LPCWSTR,
-        ppInstance: *mut *mut ISetupInstance,
-    ) -> HRESULT,
-}}
-
-RIDL! {#[uuid(0x26aab78c, 0x4a60, 0x49d6, 0xaf, 0x3b, 0x3c, 0x35, 0xbc, 0x93, 0x36, 0x5d)]
-interface ISetupConfiguration2(ISetupConfiguration2Vtbl):
-    ISetupConfiguration(ISetupConfigurationVtbl) {
-    fn EnumAllInstances(
-        ppEnumInstances: *mut *mut IEnumSetupInstances,
-    ) -> HRESULT,
-}}
-
-RIDL! {#[uuid(0xda8d8a16, 0xb2b6, 0x4487, 0xa2, 0xf1, 0x59, 0x4c, 0xcc, 0xcd, 0x6b, 0xf5)]
-interface ISetupPackageReference(ISetupPackageReferenceVtbl): IUnknown(IUnknownVtbl) {
-    fn GetId(
-        pbstrId: *mut BSTR,
-    ) -> HRESULT,
-    fn GetVersion(
-        pbstrVersion: *mut BSTR,
-    ) -> HRESULT,
-    fn GetChip(
-        pbstrChip: *mut BSTR,
-    ) -> HRESULT,
-    fn GetLanguage(
-        pbstrLanguage: *mut BSTR,
-    ) -> HRESULT,
-    fn GetBranch(
-        pbstrBranch: *mut BSTR,
-    ) -> HRESULT,
-    fn GetType(
-        pbstrType: *mut BSTR,
-    ) -> HRESULT,
-    fn GetUniqueId(
-        pbstrUniqueId: *mut BSTR,
-    ) -> HRESULT,
-}}
-
-RIDL! {#[uuid(0x42b21b78, 0x6192, 0x463e, 0x87, 0xbf, 0xd5, 0x77, 0x83, 0x8f, 0x1d, 0x5c)]
-interface ISetupHelper(ISetupHelperVtbl): IUnknown(IUnknownVtbl) {
-    fn ParseVersion(
-        pwszVersion: LPCOLESTR,
-        pullVersion: PULONGLONG,
-    ) -> HRESULT,
-    fn ParseVersionRange(
-        pwszVersionRange: LPCOLESTR,
-        pullMinVersion: PULONGLONG,
-        pullMaxVersion: PULONGLONG,
-    ) -> HRESULT,
-}}
-
-DEFINE_GUID! {CLSID_SetupConfiguration,
-0x177f0c4a, 0x1cd3, 0x4de7, 0xa3, 0x2c, 0x71, 0xdb, 0xbb, 0x9f, 0xa3, 0x6d}
-
-// Safe wrapper around the COM interfaces
-pub struct SetupConfiguration(ComPtr<ISetupConfiguration>);
-
-impl SetupConfiguration {
-    pub fn new() -> Result<SetupConfiguration, i32> {
-        let mut obj = null_mut();
-        let err = unsafe {
-            CoCreateInstance(
-                &CLSID_SetupConfiguration,
-                null_mut(),
-                CLSCTX_ALL,
-                &ISetupConfiguration::uuidof(),
-                &mut obj,
-            )
-        };
-        if err < 0 {
-            return Err(err);
-        }
-        let obj = unsafe { ComPtr::from_raw(obj as *mut ISetupConfiguration) };
-        Ok(SetupConfiguration(obj))
-    }
-    pub fn get_instance_for_current_process(&self) -> Result<SetupInstance, i32> {
-        let mut obj = null_mut();
-        let err = unsafe { self.0.GetInstanceForCurrentProcess(&mut obj) };
-        if err < 0 {
-            return Err(err);
-        }
-        Ok(unsafe { SetupInstance::from_raw(obj) })
-    }
-    pub fn enum_instances(&self) -> Result<EnumSetupInstances, i32> {
-        let mut obj = null_mut();
-        let err = unsafe { self.0.EnumInstances(&mut obj) };
-        if err < 0 {
-            return Err(err);
-        }
-        Ok(unsafe { EnumSetupInstances::from_raw(obj) })
-    }
-    pub fn enum_all_instances(&self) -> Result<EnumSetupInstances, i32> {
-        let mut obj = null_mut();
-        let this = self.0.cast::<ISetupConfiguration2>()?;
-        let err = unsafe { this.EnumAllInstances(&mut obj) };
-        if err < 0 {
-            return Err(err);
-        }
-        Ok(unsafe { EnumSetupInstances::from_raw(obj) })
-    }
-}
-
-pub struct SetupInstance(ComPtr<ISetupInstance>);
-
-impl SetupInstance {
-    pub unsafe fn from_raw(obj: *mut ISetupInstance) -> SetupInstance {
-        SetupInstance(ComPtr::from_raw(obj))
-    }
-    pub fn instance_id(&self) -> Result<OsString, i32> {
-        let mut s = null();
-        let err = unsafe { self.0.GetInstanceId(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 {
-            return Err(err);
-        }
-        Ok(bstr.to_osstring())
-    }
-    pub fn installation_name(&self) -> Result<OsString, i32> {
-        let mut s = null();
-        let err = unsafe { self.0.GetInstallationName(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 {
-            return Err(err);
-        }
-        Ok(bstr.to_osstring())
-    }
-    pub fn installation_path(&self) -> Result<OsString, i32> {
-        let mut s = null();
-        let err = unsafe { self.0.GetInstallationPath(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 {
-            return Err(err);
-        }
-        Ok(bstr.to_osstring())
-    }
-    pub fn installation_version(&self) -> Result<OsString, i32> {
-        let mut s = null();
-        let err = unsafe { self.0.GetInstallationVersion(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 {
-            return Err(err);
-        }
-        Ok(bstr.to_osstring())
-    }
-    pub fn product_path(&self) -> Result<OsString, i32> {
-        let mut s = null();
-        let this = self.0.cast::<ISetupInstance2>()?;
-        let err = unsafe { this.GetProductPath(&mut s) };
-        let bstr = unsafe { BStr::from_raw(s) };
-        if err < 0 {
-            return Err(err);
-        }
-        Ok(bstr.to_osstring())
-    }
-}
-
-pub struct EnumSetupInstances(ComPtr<IEnumSetupInstances>);
-
-impl EnumSetupInstances {
-    pub unsafe fn from_raw(obj: *mut IEnumSetupInstances) -> EnumSetupInstances {
-        EnumSetupInstances(ComPtr::from_raw(obj))
-    }
-}
-
-impl Iterator for EnumSetupInstances {
-    type Item = Result<SetupInstance, i32>;
-    fn next(&mut self) -> Option<Result<SetupInstance, i32>> {
-        let mut obj = null_mut();
-        let err = unsafe { self.0.Next(1, &mut obj, null_mut()) };
-        if err < 0 {
-            return Some(Err(err));
-        }
-        if err == S_FALSE {
-            return None;
-        }
-        Some(Ok(unsafe { SetupInstance::from_raw(obj) }))
-    }
-}
diff --git a/vendor/cc/src/vs_instances.rs b/vendor/cc/src/vs_instances.rs
deleted file mode 100644
index 31d3dd1..0000000
--- a/vendor/cc/src/vs_instances.rs
+++ /dev/null
@@ -1,199 +0,0 @@
-use std::borrow::Cow;
-use std::collections::HashMap;
-use std::convert::TryFrom;
-use std::io::BufRead;
-use std::path::PathBuf;
-
-use crate::setup_config::{EnumSetupInstances, SetupInstance};
-
-pub enum VsInstance {
-    Com(SetupInstance),
-    Vswhere(VswhereInstance),
-}
-
-impl VsInstance {
-    pub fn installation_name(&self) -> Option<Cow<str>> {
-        match self {
-            VsInstance::Com(s) => s
-                .installation_name()
-                .ok()
-                .and_then(|s| s.into_string().ok())
-                .map(Cow::from),
-            VsInstance::Vswhere(v) => v.map.get("installationName").map(Cow::from),
-        }
-    }
-
-    pub fn installation_path(&self) -> Option<PathBuf> {
-        match self {
-            VsInstance::Com(s) => s.installation_path().ok().map(PathBuf::from),
-            VsInstance::Vswhere(v) => v.map.get("installationPath").map(PathBuf::from),
-        }
-    }
-
-    pub fn installation_version(&self) -> Option<Cow<str>> {
-        match self {
-            VsInstance::Com(s) => s
-                .installation_version()
-                .ok()
-                .and_then(|s| s.into_string().ok())
-                .map(Cow::from),
-            VsInstance::Vswhere(v) => v.map.get("installationVersion").map(Cow::from),
-        }
-    }
-}
-
-pub enum VsInstances {
-    ComBased(EnumSetupInstances),
-    VswhereBased(VswhereInstance),
-}
-
-impl IntoIterator for VsInstances {
-    type Item = VsInstance;
-    #[allow(bare_trait_objects)]
-    type IntoIter = Box<Iterator<Item = Self::Item>>;
-
-    fn into_iter(self) -> Self::IntoIter {
-        match self {
-            VsInstances::ComBased(e) => {
-                Box::new(e.into_iter().filter_map(Result::ok).map(VsInstance::Com))
-            }
-            VsInstances::VswhereBased(v) => Box::new(std::iter::once(VsInstance::Vswhere(v))),
-        }
-    }
-}
-
-#[derive(Debug)]
-pub struct VswhereInstance {
-    map: HashMap<String, String>,
-}
-
-impl TryFrom<&Vec<u8>> for VswhereInstance {
-    type Error = &'static str;
-
-    fn try_from(output: &Vec<u8>) -> Result<Self, Self::Error> {
-        let map: HashMap<_, _> = output
-            .lines()
-            .filter_map(Result::ok)
-            .filter_map(|s| {
-                let mut splitn = s.splitn(2, ": ");
-                Some((splitn.next()?.to_owned(), splitn.next()?.to_owned()))
-            })
-            .collect();
-
-        if !map.contains_key("installationName")
-            || !map.contains_key("installationPath")
-            || !map.contains_key("installationVersion")
-        {
-            return Err("required properties not found");
-        }
-
-        Ok(Self { map })
-    }
-}
-
-#[cfg(test)]
-mod tests_ {
-    use std::borrow::Cow;
-    use std::convert::TryFrom;
-    use std::path::PathBuf;
-
-    #[test]
-    fn it_parses_vswhere_output_correctly() {
-        let output = br"instanceId: 58104422
-installDate: 21/02/2021 21:50:33
-installationName: VisualStudio/16.9.2+31112.23
-installationPath: C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools
-installationVersion: 16.9.31112.23
-productId: Microsoft.VisualStudio.Product.BuildTools
-productPath: C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\Common7\Tools\LaunchDevCmd.bat
-state: 4294967295
-isComplete: 1
-isLaunchable: 1
-isPrerelease: 0
-isRebootRequired: 0
-displayName: Visual Studio Build Tools 2019
-description: The Visual Studio Build Tools allows you to build native and managed MSBuild-based applications without requiring the Visual Studio IDE. There are options to install the Visual C++ compilers and libraries, MFC, ATL, and C++/CLI support.
-channelId: VisualStudio.16.Release
-channelUri: https://aka.ms/vs/16/release/channel
-enginePath: C:\Program Files (x86)\Microsoft Visual Studio\Installer\resources\app\ServiceHub\Services\Microsoft.VisualStudio.Setup.Service
-releaseNotes: https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes-v16.9#16.9.2
-thirdPartyNotices: https://go.microsoft.com/fwlink/?LinkId=660909
-updateDate: 2021-03-17T21:16:46.5963702Z
-catalog_buildBranch: d16.9
-catalog_buildVersion: 16.9.31112.23
-catalog_id: VisualStudio/16.9.2+31112.23
-catalog_localBuild: build-lab
-catalog_manifestName: VisualStudio
-catalog_manifestType: installer
-catalog_productDisplayVersion: 16.9.2
-catalog_productLine: Dev16
-catalog_productLineVersion: 2019
-catalog_productMilestone: RTW
-catalog_productMilestoneIsPreRelease: False
-catalog_productName: Visual Studio
-catalog_productPatchVersion: 2
-catalog_productPreReleaseMilestoneSuffix: 1.0
-catalog_productSemanticVersion: 16.9.2+31112.23
-catalog_requiredEngineVersion: 2.9.3365.38425
-properties_campaignId: 156063665.1613940062
-properties_channelManifestId: VisualStudio.16.Release/16.9.2+31112.23
-properties_nickname: 
-properties_setupEngineFilePath: C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installershell.exe
-"
-        .to_vec();
-
-        let vswhere_instance = super::VswhereInstance::try_from(&output);
-        assert!(vswhere_instance.is_ok());
-
-        let vs_instance = super::VsInstance::Vswhere(vswhere_instance.unwrap());
-        assert_eq!(
-            vs_instance.installation_name(),
-            Some(Cow::from("VisualStudio/16.9.2+31112.23"))
-        );
-        assert_eq!(
-            vs_instance.installation_path(),
-            Some(PathBuf::from(
-                r"C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools"
-            ))
-        );
-        assert_eq!(
-            vs_instance.installation_version(),
-            Some(Cow::from("16.9.31112.23"))
-        );
-    }
-
-    #[test]
-    fn it_returns_an_error_for_empty_output() {
-        let output = b"".to_vec();
-
-        let vswhere_instance = super::VswhereInstance::try_from(&output);
-
-        assert!(vswhere_instance.is_err());
-    }
-
-    #[test]
-    fn it_returns_an_error_for_output_consisting_of_empty_lines() {
-        let output = br"
-
-"
-        .to_vec();
-
-        let vswhere_instance = super::VswhereInstance::try_from(&output);
-
-        assert!(vswhere_instance.is_err());
-    }
-
-    #[test]
-    fn it_returns_an_error_for_output_without_required_properties() {
-        let output = br"instanceId: 58104422
-installDate: 21/02/2021 21:50:33
-productId: Microsoft.VisualStudio.Product.BuildTools
-productPath: C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\Common7\Tools\LaunchDevCmd.bat
-"
-        .to_vec();
-
-        let vswhere_instance = super::VswhereInstance::try_from(&output);
-
-        assert!(vswhere_instance.is_err());
-    }
-}
diff --git a/vendor/cc/src/winapi.rs b/vendor/cc/src/winapi.rs
deleted file mode 100644
index 223599f..0000000
--- a/vendor/cc/src/winapi.rs
+++ /dev/null
@@ -1,146 +0,0 @@
-// Copyright © 2015-2017 winapi-rs developers
-// Licensed under the Apache License, Version 2.0
-// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
-// All files in the project carrying such notice may not be copied, modified, or distributed
-// except according to those terms.
-
-#![allow(bad_style)]
-
-use std::os::raw;
-
-pub type wchar_t = u16;
-
-pub use crate::windows_sys::{FILETIME, GUID, HRESULT, SAFEARRAY, SAFEARRAYBOUND};
-
-pub type REFIID = *const IID;
-pub type IID = GUID;
-pub type ULONG = raw::c_ulong;
-pub type DWORD = u32;
-pub type LPFILETIME = *mut FILETIME;
-pub type OLECHAR = WCHAR;
-pub type WCHAR = wchar_t;
-pub type LPCOLESTR = *const OLECHAR;
-pub type LCID = DWORD;
-pub type LPCWSTR = *const WCHAR;
-pub type PULONGLONG = *mut ULONGLONG;
-pub type ULONGLONG = u64;
-
-pub trait Interface {
-    fn uuidof() -> GUID;
-}
-
-pub type LPSAFEARRAY = *mut SAFEARRAY;
-
-macro_rules! DEFINE_GUID {
-    (
-        $name:ident, $l:expr, $w1:expr, $w2:expr,
-        $b1:expr, $b2:expr, $b3:expr, $b4:expr, $b5:expr, $b6:expr, $b7:expr, $b8:expr
-    ) => {
-        pub const $name: $crate::winapi::GUID = $crate::winapi::GUID {
-            data1: $l,
-            data2: $w1,
-            data3: $w2,
-            data4: [$b1, $b2, $b3, $b4, $b5, $b6, $b7, $b8],
-        };
-    };
-}
-
-macro_rules! RIDL {
-    (#[uuid($($uuid:expr),+)]
-    interface $interface:ident ($vtbl:ident) {$(
-        fn $method:ident($($p:ident : $t:ty,)*) -> $rtr:ty,
-    )+}) => (
-        #[repr(C)]
-        pub struct $vtbl {
-            $(pub $method: unsafe extern "system" fn(
-                This: *mut $interface,
-                $($p: $t),*
-            ) -> $rtr,)+
-        }
-        #[repr(C)]
-        pub struct $interface {
-            pub lpVtbl: *const $vtbl,
-        }
-        RIDL!{@impl $interface {$(fn $method($($p: $t,)*) -> $rtr,)+}}
-        RIDL!{@uuid $interface $($uuid),+}
-    );
-    (#[uuid($($uuid:expr),+)]
-    interface $interface:ident ($vtbl:ident) : $pinterface:ident ($pvtbl:ident) {
-    }) => (
-        #[repr(C)]
-        pub struct $vtbl {
-            pub parent: $pvtbl,
-        }
-        #[repr(C)]
-        pub struct $interface {
-            pub lpVtbl: *const $vtbl,
-        }
-        RIDL!{@deref $interface $pinterface}
-        RIDL!{@uuid $interface $($uuid),+}
-    );
-    (#[uuid($($uuid:expr),+)]
-    interface $interface:ident ($vtbl:ident) : $pinterface:ident ($pvtbl:ident) {$(
-        fn $method:ident($($p:ident : $t:ty,)*) -> $rtr:ty,
-    )+}) => (
-        #[repr(C)]
-        pub struct $vtbl {
-            pub parent: $pvtbl,
-            $(pub $method: unsafe extern "system" fn(
-                This: *mut $interface,
-                $($p: $t,)*
-            ) -> $rtr,)+
-        }
-        #[repr(C)]
-        pub struct $interface {
-            pub lpVtbl: *const $vtbl,
-        }
-        RIDL!{@impl $interface {$(fn $method($($p: $t,)*) -> $rtr,)+}}
-        RIDL!{@deref $interface $pinterface}
-        RIDL!{@uuid $interface $($uuid),+}
-    );
-    (@deref $interface:ident $pinterface:ident) => (
-        impl ::std::ops::Deref for $interface {
-            type Target = $pinterface;
-            #[inline]
-            fn deref(&self) -> &$pinterface {
-                unsafe { &*(self as *const $interface as *const $pinterface) }
-            }
-        }
-    );
-    (@impl $interface:ident {$(
-        fn $method:ident($($p:ident : $t:ty,)*) -> $rtr:ty,
-    )+}) => (
-        impl $interface {
-            $(#[inline] pub unsafe fn $method(&self, $($p: $t,)*) -> $rtr {
-                ((*self.lpVtbl).$method)(self as *const _ as *mut _, $($p,)*)
-            })+
-        }
-    );
-    (@uuid $interface:ident
-        $l:expr, $w1:expr, $w2:expr,
-        $b1:expr, $b2:expr, $b3:expr, $b4:expr, $b5:expr, $b6:expr, $b7:expr, $b8:expr
-    ) => (
-        impl $crate::winapi::Interface for $interface {
-            #[inline]
-            fn uuidof() -> $crate::winapi::GUID {
-                $crate::winapi::GUID {
-                    data1: $l,
-                    data2: $w1,
-                    data3: $w2,
-                    data4: [$b1, $b2, $b3, $b4, $b5, $b6, $b7, $b8],
-                }
-            }
-        }
-    );
-}
-
-RIDL! {#[uuid(0x00000000, 0x0000, 0x0000, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46)]
-interface IUnknown(IUnknownVtbl) {
-    fn QueryInterface(
-        riid: REFIID,
-        ppvObject: *mut *mut raw::c_void,
-    ) -> HRESULT,
-    fn AddRef() -> ULONG,
-    fn Release() -> ULONG,
-}}
diff --git a/vendor/cc/src/windows_registry.rs b/vendor/cc/src/windows_registry.rs
deleted file mode 100644
index 07a9c4d..0000000
--- a/vendor/cc/src/windows_registry.rs
+++ /dev/null
@@ -1,896 +0,0 @@
-// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! A helper module to probe the Windows Registry when looking for
-//! windows-specific tools.
-
-use std::process::Command;
-
-use crate::Tool;
-#[cfg(windows)]
-use crate::ToolFamily;
-
-#[cfg(windows)]
-const MSVC_FAMILY: ToolFamily = ToolFamily::Msvc { clang_cl: false };
-
-/// Attempts to find a tool within an MSVC installation using the Windows
-/// registry as a point to search from.
-///
-/// The `target` argument is the target that the tool should work for (e.g.
-/// compile or link for) and the `tool` argument is the tool to find (e.g.
-/// `cl.exe` or `link.exe`).
-///
-/// This function will return `None` if the tool could not be found, or it will
-/// return `Some(cmd)` which represents a command that's ready to execute the
-/// tool with the appropriate environment variables set.
-///
-/// Note that this function always returns `None` for non-MSVC targets.
-pub fn find(target: &str, tool: &str) -> Option<Command> {
-    find_tool(target, tool).map(|c| c.to_command())
-}
-
-/// Similar to the `find` function above, this function will attempt the same
-/// operation (finding a MSVC tool in a local install) but instead returns a
-/// `Tool` which may be introspected.
-#[cfg(not(windows))]
-pub fn find_tool(_target: &str, _tool: &str) -> Option<Tool> {
-    None
-}
-
-/// Documented above.
-#[cfg(windows)]
-pub fn find_tool(target: &str, tool: &str) -> Option<Tool> {
-    // This logic is all tailored for MSVC, if we're not that then bail out
-    // early.
-    if !target.contains("msvc") {
-        return None;
-    }
-
-    // Looks like msbuild isn't located in the same location as other tools like
-    // cl.exe and lib.exe. To handle this we probe for it manually with
-    // dedicated registry keys.
-    if tool.contains("msbuild") {
-        return impl_::find_msbuild(target);
-    }
-
-    if tool.contains("devenv") {
-        return impl_::find_devenv(target);
-    }
-
-    // Ok, if we're here, now comes the fun part of the probing. Default shells
-    // or shells like MSYS aren't really configured to execute `cl.exe` and the
-    // various compiler tools shipped as part of Visual Studio. Here we try to
-    // first find the relevant tool, then we also have to be sure to fill in
-    // environment variables like `LIB`, `INCLUDE`, and `PATH` to ensure that
-    // the tool is actually usable.
-
-    return impl_::find_msvc_environment(tool, target)
-        .or_else(|| impl_::find_msvc_15plus(tool, target))
-        .or_else(|| impl_::find_msvc_14(tool, target))
-        .or_else(|| impl_::find_msvc_12(tool, target))
-        .or_else(|| impl_::find_msvc_11(tool, target));
-}
-
-/// A version of Visual Studio
-#[derive(Debug, PartialEq, Eq, Copy, Clone)]
-#[non_exhaustive]
-pub enum VsVers {
-    /// Visual Studio 12 (2013)
-    Vs12,
-    /// Visual Studio 14 (2015)
-    Vs14,
-    /// Visual Studio 15 (2017)
-    Vs15,
-    /// Visual Studio 16 (2019)
-    Vs16,
-    /// Visual Studio 17 (2022)
-    Vs17,
-}
-
-/// Find the most recent installed version of Visual Studio
-///
-/// This is used by the cmake crate to figure out the correct
-/// generator.
-#[cfg(not(windows))]
-pub fn find_vs_version() -> Result<VsVers, String> {
-    Err("not windows".to_string())
-}
-
-/// Documented above
-#[cfg(windows)]
-pub fn find_vs_version() -> Result<VsVers, String> {
-    use std::env;
-
-    match env::var("VisualStudioVersion") {
-        Ok(version) => match &version[..] {
-            "17.0" => Ok(VsVers::Vs17),
-            "16.0" => Ok(VsVers::Vs16),
-            "15.0" => Ok(VsVers::Vs15),
-            "14.0" => Ok(VsVers::Vs14),
-            "12.0" => Ok(VsVers::Vs12),
-            vers => Err(format!(
-                "\n\n\
-                 unsupported or unknown VisualStudio version: {}\n\
-                 if another version is installed consider running \
-                 the appropriate vcvars script before building this \
-                 crate\n\
-                 ",
-                vers
-            )),
-        },
-        _ => {
-            // Check for the presence of a specific registry key
-            // that indicates visual studio is installed.
-            if impl_::has_msbuild_version("17.0") {
-                Ok(VsVers::Vs17)
-            } else if impl_::has_msbuild_version("16.0") {
-                Ok(VsVers::Vs16)
-            } else if impl_::has_msbuild_version("15.0") {
-                Ok(VsVers::Vs15)
-            } else if impl_::has_msbuild_version("14.0") {
-                Ok(VsVers::Vs14)
-            } else if impl_::has_msbuild_version("12.0") {
-                Ok(VsVers::Vs12)
-            } else {
-                Err(format!(
-                    "\n\n\
-                     couldn't determine visual studio generator\n\
-                     if VisualStudio is installed, however, consider \
-                     running the appropriate vcvars script before building \
-                     this crate\n\
-                     "
-                ))
-            }
-        }
-    }
-}
-
-#[cfg(windows)]
-mod impl_ {
-    use crate::com;
-    use crate::registry::{RegistryKey, LOCAL_MACHINE};
-    use crate::setup_config::SetupConfiguration;
-    use crate::vs_instances::{VsInstances, VswhereInstance};
-    use std::convert::TryFrom;
-    use std::env;
-    use std::ffi::OsString;
-    use std::fs::File;
-    use std::io::Read;
-    use std::iter;
-    use std::mem;
-    use std::path::{Path, PathBuf};
-    use std::process::Command;
-    use std::str::FromStr;
-
-    use super::MSVC_FAMILY;
-    use crate::Tool;
-
-    struct MsvcTool {
-        tool: PathBuf,
-        libs: Vec<PathBuf>,
-        path: Vec<PathBuf>,
-        include: Vec<PathBuf>,
-    }
-
-    impl MsvcTool {
-        fn new(tool: PathBuf) -> MsvcTool {
-            MsvcTool {
-                tool: tool,
-                libs: Vec::new(),
-                path: Vec::new(),
-                include: Vec::new(),
-            }
-        }
-
-        fn into_tool(self) -> Tool {
-            let MsvcTool {
-                tool,
-                libs,
-                path,
-                include,
-            } = self;
-            let mut tool = Tool::with_family(tool.into(), MSVC_FAMILY);
-            add_env(&mut tool, "LIB", libs);
-            add_env(&mut tool, "PATH", path);
-            add_env(&mut tool, "INCLUDE", include);
-            tool
-        }
-    }
-
-    /// Checks to see if the `VSCMD_ARG_TGT_ARCH` environment variable matches the
-    /// given target's arch. Returns `None` if the variable does not exist.
-    #[cfg(windows)]
-    fn is_vscmd_target(target: &str) -> Option<bool> {
-        let vscmd_arch = env::var("VSCMD_ARG_TGT_ARCH").ok()?;
-        // Convert the Rust target arch to its VS arch equivalent.
-        let arch = match target.split("-").next() {
-            Some("x86_64") => "x64",
-            Some("aarch64") => "arm64",
-            Some("i686") | Some("i586") => "x86",
-            Some("thumbv7a") => "arm",
-            // An unrecognized arch.
-            _ => return Some(false),
-        };
-        Some(vscmd_arch == arch)
-    }
-
-    /// Attempt to find the tool using environment variables set by vcvars.
-    pub fn find_msvc_environment(tool: &str, target: &str) -> Option<Tool> {
-        // Early return if the environment doesn't contain a VC install.
-        if env::var_os("VCINSTALLDIR").is_none() {
-            return None;
-        }
-        let vs_install_dir = env::var_os("VSINSTALLDIR")?.into();
-
-        // If the vscmd target differs from the requested target then
-        // attempt to get the tool using the VS install directory.
-        if is_vscmd_target(target) == Some(false) {
-            // We will only get here with versions 15+.
-            tool_from_vs15plus_instance(tool, target, &vs_install_dir)
-        } else {
-            // Fallback to simply using the current environment.
-            env::var_os("PATH")
-                .and_then(|path| {
-                    env::split_paths(&path)
-                        .map(|p| p.join(tool))
-                        .find(|p| p.exists())
-                })
-                .map(|path| Tool::with_family(path.into(), MSVC_FAMILY))
-        }
-    }
-
-    fn find_msbuild_vs17(target: &str) -> Option<Tool> {
-        find_tool_in_vs16plus_path(r"MSBuild\Current\Bin\MSBuild.exe", target, "17")
-    }
-
-    #[allow(bare_trait_objects)]
-    fn vs16plus_instances(target: &str, version: &'static str) -> Box<Iterator<Item = PathBuf>> {
-        let instances = if let Some(instances) = vs15plus_instances(target) {
-            instances
-        } else {
-            return Box::new(iter::empty());
-        };
-        Box::new(instances.into_iter().filter_map(move |instance| {
-            let installation_name = instance.installation_name()?;
-            if installation_name.starts_with(&format!("VisualStudio/{}.", version)) {
-                Some(instance.installation_path()?)
-            } else if installation_name.starts_with(&format!("VisualStudioPreview/{}.", version)) {
-                Some(instance.installation_path()?)
-            } else {
-                None
-            }
-        }))
-    }
-
-    fn find_tool_in_vs16plus_path(tool: &str, target: &str, version: &'static str) -> Option<Tool> {
-        vs16plus_instances(target, version)
-            .filter_map(|path| {
-                let path = path.join(tool);
-                if !path.is_file() {
-                    return None;
-                }
-                let mut tool = Tool::with_family(path, MSVC_FAMILY);
-                if target.contains("x86_64") {
-                    tool.env.push(("Platform".into(), "X64".into()));
-                }
-                if target.contains("aarch64") {
-                    tool.env.push(("Platform".into(), "ARM64".into()));
-                }
-                Some(tool)
-            })
-            .next()
-    }
-
-    fn find_msbuild_vs16(target: &str) -> Option<Tool> {
-        find_tool_in_vs16plus_path(r"MSBuild\Current\Bin\MSBuild.exe", target, "16")
-    }
-
-    // In MSVC 15 (2017) MS once again changed the scheme for locating
-    // the tooling.  Now we must go through some COM interfaces, which
-    // is super fun for Rust.
-    //
-    // Note that much of this logic can be found [online] wrt paths, COM, etc.
-    //
-    // [online]: https://blogs.msdn.microsoft.com/vcblog/2017/03/06/finding-the-visual-c-compiler-tools-in-visual-studio-2017/
-    //
-    // Returns MSVC 15+ instances (15, 16 right now), the order should be consider undefined.
-    //
-    // However, on ARM64 this method doesn't work because VS Installer fails to register COM component on ARM64.
-    // Hence, as the last resort we try to use vswhere.exe to list available instances.
-    fn vs15plus_instances(target: &str) -> Option<VsInstances> {
-        vs15plus_instances_using_com().or_else(|| vs15plus_instances_using_vswhere(target))
-    }
-
-    fn vs15plus_instances_using_com() -> Option<VsInstances> {
-        com::initialize().ok()?;
-
-        let config = SetupConfiguration::new().ok()?;
-        let enum_setup_instances = config.enum_all_instances().ok()?;
-
-        Some(VsInstances::ComBased(enum_setup_instances))
-    }
-
-    fn vs15plus_instances_using_vswhere(target: &str) -> Option<VsInstances> {
-        let program_files_path: PathBuf = env::var("ProgramFiles(x86)")
-            .or_else(|_| env::var("ProgramFiles"))
-            .ok()?
-            .into();
-
-        let vswhere_path =
-            program_files_path.join(r"Microsoft Visual Studio\Installer\vswhere.exe");
-
-        if !vswhere_path.exists() {
-            return None;
-        }
-
-        let arch = target.split('-').next().unwrap();
-        let tools_arch = match arch {
-            "i586" | "i686" | "x86_64" => Some("x86.x64"),
-            "arm" | "thumbv7a" => Some("ARM"),
-            "aarch64" => Some("ARM64"),
-            _ => None,
-        };
-
-        let vswhere_output = Command::new(vswhere_path)
-            .args(&[
-                "-latest",
-                "-products",
-                "*",
-                "-requires",
-                &format!("Microsoft.VisualStudio.Component.VC.Tools.{}", tools_arch?),
-                "-format",
-                "text",
-                "-nologo",
-            ])
-            .stderr(std::process::Stdio::inherit())
-            .output()
-            .ok()?;
-
-        let vs_instances =
-            VsInstances::VswhereBased(VswhereInstance::try_from(&vswhere_output.stdout).ok()?);
-
-        Some(vs_instances)
-    }
-
-    // Inspired from official microsoft/vswhere ParseVersionString
-    // i.e. at most four u16 numbers separated by '.'
-    fn parse_version(version: &str) -> Option<Vec<u16>> {
-        version
-            .split('.')
-            .map(|chunk| u16::from_str(chunk).ok())
-            .collect()
-    }
-
-    pub fn find_msvc_15plus(tool: &str, target: &str) -> Option<Tool> {
-        let iter = vs15plus_instances(target)?;
-        iter.into_iter()
-            .filter_map(|instance| {
-                let version = parse_version(&instance.installation_version()?)?;
-                let instance_path = instance.installation_path()?;
-                let tool = tool_from_vs15plus_instance(tool, target, &instance_path)?;
-                Some((version, tool))
-            })
-            .max_by(|(a_version, _), (b_version, _)| a_version.cmp(b_version))
-            .map(|(_version, tool)| tool)
-    }
-
-    // While the paths to Visual Studio 2017's devenv and MSBuild could
-    // potentially be retrieved from the registry, finding them via
-    // SetupConfiguration has shown to be [more reliable], and is preferred
-    // according to Microsoft. To help head off potential regressions though,
-    // we keep the registry method as a fallback option.
-    //
-    // [more reliable]: https://github.com/rust-lang/cc-rs/pull/331
-    fn find_tool_in_vs15_path(tool: &str, target: &str) -> Option<Tool> {
-        let mut path = match vs15plus_instances(target) {
-            Some(instances) => instances
-                .into_iter()
-                .filter_map(|instance| instance.installation_path())
-                .map(|path| path.join(tool))
-                .find(|ref path| path.is_file()),
-            None => None,
-        };
-
-        if path.is_none() {
-            let key = r"SOFTWARE\WOW6432Node\Microsoft\VisualStudio\SxS\VS7";
-            path = LOCAL_MACHINE
-                .open(key.as_ref())
-                .ok()
-                .and_then(|key| key.query_str("15.0").ok())
-                .map(|path| PathBuf::from(path).join(tool))
-                .and_then(|path| if path.is_file() { Some(path) } else { None });
-        }
-
-        path.map(|path| {
-            let mut tool = Tool::with_family(path, MSVC_FAMILY);
-            if target.contains("x86_64") {
-                tool.env.push(("Platform".into(), "X64".into()));
-            }
-            if target.contains("aarch64") {
-                tool.env.push(("Platform".into(), "ARM64".into()));
-            }
-            tool
-        })
-    }
-
-    fn tool_from_vs15plus_instance(
-        tool: &str,
-        target: &str,
-        instance_path: &PathBuf,
-    ) -> Option<Tool> {
-        let (root_path, bin_path, host_dylib_path, lib_path, include_path) =
-            vs15plus_vc_paths(target, instance_path)?;
-        let tool_path = bin_path.join(tool);
-        if !tool_path.exists() {
-            return None;
-        };
-
-        let mut tool = MsvcTool::new(tool_path);
-        tool.path.push(bin_path.clone());
-        tool.path.push(host_dylib_path);
-        tool.libs.push(lib_path);
-        tool.include.push(include_path);
-
-        if let Some((atl_lib_path, atl_include_path)) = atl_paths(target, &root_path) {
-            tool.libs.push(atl_lib_path);
-            tool.include.push(atl_include_path);
-        }
-
-        add_sdks(&mut tool, target)?;
-
-        Some(tool.into_tool())
-    }
-
-    fn vs15plus_vc_paths(
-        target: &str,
-        instance_path: &PathBuf,
-    ) -> Option<(PathBuf, PathBuf, PathBuf, PathBuf, PathBuf)> {
-        let version_path =
-            instance_path.join(r"VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt");
-        let mut version_file = File::open(version_path).ok()?;
-        let mut version = String::new();
-        version_file.read_to_string(&mut version).ok()?;
-        let version = version.trim();
-        let host = match host_arch() {
-            X86 => "X86",
-            X86_64 => "X64",
-            // There is no natively hosted compiler on ARM64.
-            // Instead, use the x86 toolchain under emulation (there is no x64 emulation).
-            AARCH64 => "X86",
-            _ => return None,
-        };
-        let target = lib_subdir(target)?;
-        // The directory layout here is MSVC/bin/Host$host/$target/
-        let path = instance_path.join(r"VC\Tools\MSVC").join(version);
-        // This is the path to the toolchain for a particular target, running
-        // on a given host
-        let bin_path = path
-            .join("bin")
-            .join(&format!("Host{}", host))
-            .join(&target);
-        // But! we also need PATH to contain the target directory for the host
-        // architecture, because it contains dlls like mspdb140.dll compiled for
-        // the host architecture.
-        let host_dylib_path = path
-            .join("bin")
-            .join(&format!("Host{}", host))
-            .join(&host.to_lowercase());
-        let lib_path = path.join("lib").join(&target);
-        let include_path = path.join("include");
-        Some((path, bin_path, host_dylib_path, lib_path, include_path))
-    }
-
-    fn atl_paths(target: &str, path: &Path) -> Option<(PathBuf, PathBuf)> {
-        let atl_path = path.join("atlmfc");
-        let sub = lib_subdir(target)?;
-        if atl_path.exists() {
-            Some((atl_path.join("lib").join(sub), atl_path.join("include")))
-        } else {
-            None
-        }
-    }
-
-    // For MSVC 14 we need to find the Universal CRT as well as either
-    // the Windows 10 SDK or Windows 8.1 SDK.
-    pub fn find_msvc_14(tool: &str, target: &str) -> Option<Tool> {
-        let vcdir = get_vc_dir("14.0")?;
-        let mut tool = get_tool(tool, &vcdir, target)?;
-        add_sdks(&mut tool, target)?;
-        Some(tool.into_tool())
-    }
-
-    fn add_sdks(tool: &mut MsvcTool, target: &str) -> Option<()> {
-        let sub = lib_subdir(target)?;
-        let (ucrt, ucrt_version) = get_ucrt_dir()?;
-
-        let host = match host_arch() {
-            X86 => "x86",
-            X86_64 => "x64",
-            AARCH64 => "arm64",
-            _ => return None,
-        };
-
-        tool.path
-            .push(ucrt.join("bin").join(&ucrt_version).join(host));
-
-        let ucrt_include = ucrt.join("include").join(&ucrt_version);
-        tool.include.push(ucrt_include.join("ucrt"));
-
-        let ucrt_lib = ucrt.join("lib").join(&ucrt_version);
-        tool.libs.push(ucrt_lib.join("ucrt").join(sub));
-
-        if let Some((sdk, version)) = get_sdk10_dir() {
-            tool.path.push(sdk.join("bin").join(host));
-            let sdk_lib = sdk.join("lib").join(&version);
-            tool.libs.push(sdk_lib.join("um").join(sub));
-            let sdk_include = sdk.join("include").join(&version);
-            tool.include.push(sdk_include.join("um"));
-            tool.include.push(sdk_include.join("cppwinrt"));
-            tool.include.push(sdk_include.join("winrt"));
-            tool.include.push(sdk_include.join("shared"));
-        } else if let Some(sdk) = get_sdk81_dir() {
-            tool.path.push(sdk.join("bin").join(host));
-            let sdk_lib = sdk.join("lib").join("winv6.3");
-            tool.libs.push(sdk_lib.join("um").join(sub));
-            let sdk_include = sdk.join("include");
-            tool.include.push(sdk_include.join("um"));
-            tool.include.push(sdk_include.join("winrt"));
-            tool.include.push(sdk_include.join("shared"));
-        }
-
-        Some(())
-    }
-
-    // For MSVC 12 we need to find the Windows 8.1 SDK.
-    pub fn find_msvc_12(tool: &str, target: &str) -> Option<Tool> {
-        let vcdir = get_vc_dir("12.0")?;
-        let mut tool = get_tool(tool, &vcdir, target)?;
-        let sub = lib_subdir(target)?;
-        let sdk81 = get_sdk81_dir()?;
-        tool.path.push(sdk81.join("bin").join(sub));
-        let sdk_lib = sdk81.join("lib").join("winv6.3");
-        tool.libs.push(sdk_lib.join("um").join(sub));
-        let sdk_include = sdk81.join("include");
-        tool.include.push(sdk_include.join("shared"));
-        tool.include.push(sdk_include.join("um"));
-        tool.include.push(sdk_include.join("winrt"));
-        Some(tool.into_tool())
-    }
-
-    // For MSVC 11 we need to find the Windows 8 SDK.
-    pub fn find_msvc_11(tool: &str, target: &str) -> Option<Tool> {
-        let vcdir = get_vc_dir("11.0")?;
-        let mut tool = get_tool(tool, &vcdir, target)?;
-        let sub = lib_subdir(target)?;
-        let sdk8 = get_sdk8_dir()?;
-        tool.path.push(sdk8.join("bin").join(sub));
-        let sdk_lib = sdk8.join("lib").join("win8");
-        tool.libs.push(sdk_lib.join("um").join(sub));
-        let sdk_include = sdk8.join("include");
-        tool.include.push(sdk_include.join("shared"));
-        tool.include.push(sdk_include.join("um"));
-        tool.include.push(sdk_include.join("winrt"));
-        Some(tool.into_tool())
-    }
-
-    fn add_env(tool: &mut Tool, env: &str, paths: Vec<PathBuf>) {
-        let prev = env::var_os(env).unwrap_or(OsString::new());
-        let prev = env::split_paths(&prev);
-        let new = paths.into_iter().chain(prev);
-        tool.env
-            .push((env.to_string().into(), env::join_paths(new).unwrap()));
-    }
-
-    // Given a possible MSVC installation directory, we look for the linker and
-    // then add the MSVC library path.
-    fn get_tool(tool: &str, path: &Path, target: &str) -> Option<MsvcTool> {
-        bin_subdir(target)
-            .into_iter()
-            .map(|(sub, host)| {
-                (
-                    path.join("bin").join(sub).join(tool),
-                    path.join("bin").join(host),
-                )
-            })
-            .filter(|&(ref path, _)| path.is_file())
-            .map(|(path, host)| {
-                let mut tool = MsvcTool::new(path);
-                tool.path.push(host);
-                tool
-            })
-            .filter_map(|mut tool| {
-                let sub = vc_lib_subdir(target)?;
-                tool.libs.push(path.join("lib").join(sub));
-                tool.include.push(path.join("include"));
-                let atlmfc_path = path.join("atlmfc");
-                if atlmfc_path.exists() {
-                    tool.libs.push(atlmfc_path.join("lib").join(sub));
-                    tool.include.push(atlmfc_path.join("include"));
-                }
-                Some(tool)
-            })
-            .next()
-    }
-
-    // To find MSVC we look in a specific registry key for the version we are
-    // trying to find.
-    fn get_vc_dir(ver: &str) -> Option<PathBuf> {
-        let key = r"SOFTWARE\Microsoft\VisualStudio\SxS\VC7";
-        let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
-        let path = key.query_str(ver).ok()?;
-        Some(path.into())
-    }
-
-    // To find the Universal CRT we look in a specific registry key for where
-    // all the Universal CRTs are located and then sort them asciibetically to
-    // find the newest version. While this sort of sorting isn't ideal,  it is
-    // what vcvars does so that's good enough for us.
-    //
-    // Returns a pair of (root, version) for the ucrt dir if found
-    fn get_ucrt_dir() -> Option<(PathBuf, String)> {
-        let key = r"SOFTWARE\Microsoft\Windows Kits\Installed Roots";
-        let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
-        let root = key.query_str("KitsRoot10").ok()?;
-        let readdir = Path::new(&root).join("lib").read_dir().ok()?;
-        let max_libdir = readdir
-            .filter_map(|dir| dir.ok())
-            .map(|dir| dir.path())
-            .filter(|dir| {
-                dir.components()
-                    .last()
-                    .and_then(|c| c.as_os_str().to_str())
-                    .map(|c| c.starts_with("10.") && dir.join("ucrt").is_dir())
-                    .unwrap_or(false)
-            })
-            .max()?;
-        let version = max_libdir.components().last().unwrap();
-        let version = version.as_os_str().to_str().unwrap().to_string();
-        Some((root.into(), version))
-    }
-
-    // Vcvars finds the correct version of the Windows 10 SDK by looking
-    // for the include `um\Windows.h` because sometimes a given version will
-    // only have UCRT bits without the rest of the SDK. Since we only care about
-    // libraries and not includes, we instead look for `um\x64\kernel32.lib`.
-    // Since the 32-bit and 64-bit libraries are always installed together we
-    // only need to bother checking x64, making this code a tiny bit simpler.
-    // Like we do for the Universal CRT, we sort the possibilities
-    // asciibetically to find the newest one as that is what vcvars does.
-    // Before doing that, we check the "WindowsSdkDir" and "WindowsSDKVersion"
-    // environment variables set by vcvars to use the environment sdk version
-    // if one is already configured.
-    fn get_sdk10_dir() -> Option<(PathBuf, String)> {
-        if let (Ok(root), Ok(version)) = (env::var("WindowsSdkDir"), env::var("WindowsSDKVersion"))
-        {
-            return Some((root.into(), version.trim_end_matches('\\').to_string()));
-        }
-
-        let key = r"SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0";
-        let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
-        let root = key.query_str("InstallationFolder").ok()?;
-        let readdir = Path::new(&root).join("lib").read_dir().ok()?;
-        let mut dirs = readdir
-            .filter_map(|dir| dir.ok())
-            .map(|dir| dir.path())
-            .collect::<Vec<_>>();
-        dirs.sort();
-        let dir = dirs
-            .into_iter()
-            .rev()
-            .filter(|dir| dir.join("um").join("x64").join("kernel32.lib").is_file())
-            .next()?;
-        let version = dir.components().last().unwrap();
-        let version = version.as_os_str().to_str().unwrap().to_string();
-        Some((root.into(), version))
-    }
-
-    // Interestingly there are several subdirectories, `win7` `win8` and
-    // `winv6.3`. Vcvars seems to only care about `winv6.3` though, so the same
-    // applies to us. Note that if we were targeting kernel mode drivers
-    // instead of user mode applications, we would care.
-    fn get_sdk81_dir() -> Option<PathBuf> {
-        let key = r"SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.1";
-        let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
-        let root = key.query_str("InstallationFolder").ok()?;
-        Some(root.into())
-    }
-
-    fn get_sdk8_dir() -> Option<PathBuf> {
-        let key = r"SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.0";
-        let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
-        let root = key.query_str("InstallationFolder").ok()?;
-        Some(root.into())
-    }
-
-    const PROCESSOR_ARCHITECTURE_INTEL: u16 = 0;
-    const PROCESSOR_ARCHITECTURE_AMD64: u16 = 9;
-    const PROCESSOR_ARCHITECTURE_ARM64: u16 = 12;
-    const X86: u16 = PROCESSOR_ARCHITECTURE_INTEL;
-    const X86_64: u16 = PROCESSOR_ARCHITECTURE_AMD64;
-    const AARCH64: u16 = PROCESSOR_ARCHITECTURE_ARM64;
-
-    // When choosing the tool to use, we have to choose the one which matches
-    // the target architecture. Otherwise we end up in situations where someone
-    // on 32-bit Windows is trying to cross compile to 64-bit and it tries to
-    // invoke the native 64-bit compiler which won't work.
-    //
-    // For the return value of this function, the first member of the tuple is
-    // the folder of the tool we will be invoking, while the second member is
-    // the folder of the host toolchain for that tool which is essential when
-    // using a cross linker. We return a Vec since on x64 there are often two
-    // linkers that can target the architecture we desire. The 64-bit host
-    // linker is preferred, and hence first, due to 64-bit allowing it more
-    // address space to work with and potentially being faster.
-    fn bin_subdir(target: &str) -> Vec<(&'static str, &'static str)> {
-        let arch = target.split('-').next().unwrap();
-        match (arch, host_arch()) {
-            ("i586", X86) | ("i686", X86) => vec![("", "")],
-            ("i586", X86_64) | ("i686", X86_64) => vec![("amd64_x86", "amd64"), ("", "")],
-            ("x86_64", X86) => vec![("x86_amd64", "")],
-            ("x86_64", X86_64) => vec![("amd64", "amd64"), ("x86_amd64", "")],
-            ("arm", X86) | ("thumbv7a", X86) => vec![("x86_arm", "")],
-            ("arm", X86_64) | ("thumbv7a", X86_64) => vec![("amd64_arm", "amd64"), ("x86_arm", "")],
-            _ => vec![],
-        }
-    }
-
-    fn lib_subdir(target: &str) -> Option<&'static str> {
-        let arch = target.split('-').next().unwrap();
-        match arch {
-            "i586" | "i686" => Some("x86"),
-            "x86_64" => Some("x64"),
-            "arm" | "thumbv7a" => Some("arm"),
-            "aarch64" => Some("arm64"),
-            _ => None,
-        }
-    }
-
-    // MSVC's x86 libraries are not in a subfolder
-    fn vc_lib_subdir(target: &str) -> Option<&'static str> {
-        let arch = target.split('-').next().unwrap();
-        match arch {
-            "i586" | "i686" => Some(""),
-            "x86_64" => Some("amd64"),
-            "arm" | "thumbv7a" => Some("arm"),
-            "aarch64" => Some("arm64"),
-            _ => None,
-        }
-    }
-
-    #[allow(bad_style)]
-    fn host_arch() -> u16 {
-        type DWORD = u32;
-        type WORD = u16;
-        type LPVOID = *mut u8;
-        type DWORD_PTR = usize;
-
-        #[repr(C)]
-        struct SYSTEM_INFO {
-            wProcessorArchitecture: WORD,
-            _wReserved: WORD,
-            _dwPageSize: DWORD,
-            _lpMinimumApplicationAddress: LPVOID,
-            _lpMaximumApplicationAddress: LPVOID,
-            _dwActiveProcessorMask: DWORD_PTR,
-            _dwNumberOfProcessors: DWORD,
-            _dwProcessorType: DWORD,
-            _dwAllocationGranularity: DWORD,
-            _wProcessorLevel: WORD,
-            _wProcessorRevision: WORD,
-        }
-
-        extern "system" {
-            fn GetNativeSystemInfo(lpSystemInfo: *mut SYSTEM_INFO);
-        }
-
-        unsafe {
-            let mut info = mem::zeroed();
-            GetNativeSystemInfo(&mut info);
-            info.wProcessorArchitecture
-        }
-    }
-
-    // Given a registry key, look at all the sub keys and find the one which has
-    // the maximal numeric value.
-    //
-    // Returns the name of the maximal key as well as the opened maximal key.
-    fn max_version(key: &RegistryKey) -> Option<(OsString, RegistryKey)> {
-        let mut max_vers = 0;
-        let mut max_key = None;
-        for subkey in key.iter().filter_map(|k| k.ok()) {
-            let val = subkey
-                .to_str()
-                .and_then(|s| s.trim_left_matches("v").replace(".", "").parse().ok());
-            let val = match val {
-                Some(s) => s,
-                None => continue,
-            };
-            if val > max_vers {
-                if let Ok(k) = key.open(&subkey) {
-                    max_vers = val;
-                    max_key = Some((subkey, k));
-                }
-            }
-        }
-        max_key
-    }
-
-    pub fn has_msbuild_version(version: &str) -> bool {
-        match version {
-            "17.0" => {
-                find_msbuild_vs17("x86_64-pc-windows-msvc").is_some()
-                    || find_msbuild_vs17("i686-pc-windows-msvc").is_some()
-                    || find_msbuild_vs17("aarch64-pc-windows-msvc").is_some()
-            }
-            "16.0" => {
-                find_msbuild_vs16("x86_64-pc-windows-msvc").is_some()
-                    || find_msbuild_vs16("i686-pc-windows-msvc").is_some()
-                    || find_msbuild_vs16("aarch64-pc-windows-msvc").is_some()
-            }
-            "15.0" => {
-                find_msbuild_vs15("x86_64-pc-windows-msvc").is_some()
-                    || find_msbuild_vs15("i686-pc-windows-msvc").is_some()
-                    || find_msbuild_vs15("aarch64-pc-windows-msvc").is_some()
-            }
-            "12.0" | "14.0" => LOCAL_MACHINE
-                .open(&OsString::from(format!(
-                    "SOFTWARE\\Microsoft\\MSBuild\\ToolsVersions\\{}",
-                    version
-                )))
-                .is_ok(),
-            _ => false,
-        }
-    }
-
-    pub fn find_devenv(target: &str) -> Option<Tool> {
-        find_devenv_vs15(&target)
-    }
-
-    fn find_devenv_vs15(target: &str) -> Option<Tool> {
-        find_tool_in_vs15_path(r"Common7\IDE\devenv.exe", target)
-    }
-
-    // see http://stackoverflow.com/questions/328017/path-to-msbuild
-    pub fn find_msbuild(target: &str) -> Option<Tool> {
-        // VS 15 (2017) changed how to locate msbuild
-        if let Some(r) = find_msbuild_vs17(target) {
-            return Some(r);
-        } else if let Some(r) = find_msbuild_vs16(target) {
-            return Some(r);
-        } else if let Some(r) = find_msbuild_vs15(target) {
-            return Some(r);
-        } else {
-            find_old_msbuild(target)
-        }
-    }
-
-    fn find_msbuild_vs15(target: &str) -> Option<Tool> {
-        find_tool_in_vs15_path(r"MSBuild\15.0\Bin\MSBuild.exe", target)
-    }
-
-    fn find_old_msbuild(target: &str) -> Option<Tool> {
-        let key = r"SOFTWARE\Microsoft\MSBuild\ToolsVersions";
-        LOCAL_MACHINE
-            .open(key.as_ref())
-            .ok()
-            .and_then(|key| {
-                max_version(&key).and_then(|(_vers, key)| key.query_str("MSBuildToolsPath").ok())
-            })
-            .map(|path| {
-                let mut path = PathBuf::from(path);
-                path.push("MSBuild.exe");
-                let mut tool = Tool::with_family(path, MSVC_FAMILY);
-                if target.contains("x86_64") {
-                    tool.env.push(("Platform".into(), "X64".into()));
-                }
-                tool
-            })
-    }
-}
diff --git a/vendor/cc/src/windows_sys.rs b/vendor/cc/src/windows_sys.rs
deleted file mode 100644
index ee4704d..0000000
--- a/vendor/cc/src/windows_sys.rs
+++ /dev/null
@@ -1,198 +0,0 @@
-// This file is autogenerated.
-//
-// To add bindings, edit windows_sys.lst then run:
-//
-// ```
-// cd generate-windows-sys/
-// cargo run
-// ```
-// Bindings generated by `windows-bindgen` 0.49.0
-
-#![allow(
-    non_snake_case,
-    non_upper_case_globals,
-    non_camel_case_types,
-    dead_code,
-    clippy::all
-)]
-#[link(name = "advapi32")]
-extern "system" {
-    pub fn RegCloseKey(hkey: HKEY) -> WIN32_ERROR;
-}
-#[link(name = "advapi32")]
-extern "system" {
-    pub fn RegEnumKeyExW(
-        hkey: HKEY,
-        dwindex: u32,
-        lpname: PWSTR,
-        lpcchname: *mut u32,
-        lpreserved: *const u32,
-        lpclass: PWSTR,
-        lpcchclass: *mut u32,
-        lpftlastwritetime: *mut FILETIME,
-    ) -> WIN32_ERROR;
-}
-#[link(name = "advapi32")]
-extern "system" {
-    pub fn RegOpenKeyExW(
-        hkey: HKEY,
-        lpsubkey: PCWSTR,
-        uloptions: u32,
-        samdesired: REG_SAM_FLAGS,
-        phkresult: *mut HKEY,
-    ) -> WIN32_ERROR;
-}
-#[link(name = "advapi32")]
-extern "system" {
-    pub fn RegQueryValueExW(
-        hkey: HKEY,
-        lpvaluename: PCWSTR,
-        lpreserved: *const u32,
-        lptype: *mut REG_VALUE_TYPE,
-        lpdata: *mut u8,
-        lpcbdata: *mut u32,
-    ) -> WIN32_ERROR;
-}
-#[link(name = "kernel32")]
-extern "system" {
-    pub fn CreatePipe(
-        hreadpipe: *mut HANDLE,
-        hwritepipe: *mut HANDLE,
-        lppipeattributes: *const SECURITY_ATTRIBUTES,
-        nsize: u32,
-    ) -> BOOL;
-}
-#[link(name = "ole32")]
-extern "system" {
-    pub fn CoCreateInstance(
-        rclsid: *const GUID,
-        punkouter: IUnknown,
-        dwclscontext: CLSCTX,
-        riid: *const GUID,
-        ppv: *mut *mut ::core::ffi::c_void,
-    ) -> HRESULT;
-}
-#[link(name = "ole32")]
-extern "system" {
-    pub fn CoInitializeEx(pvreserved: *const ::core::ffi::c_void, dwcoinit: COINIT) -> HRESULT;
-}
-#[link(name = "oleaut32")]
-extern "system" {
-    pub fn SysFreeString(bstrstring: BSTR) -> ();
-}
-#[link(name = "oleaut32")]
-extern "system" {
-    pub fn SysStringLen(pbstr: BSTR) -> u32;
-}
-pub type ADVANCED_FEATURE_FLAGS = u16;
-pub type BOOL = i32;
-pub type BSTR = *const u16;
-pub type CLSCTX = u32;
-pub const CLSCTX_ALL: CLSCTX = 23u32;
-pub type COINIT = i32;
-pub const COINIT_MULTITHREADED: COINIT = 0i32;
-pub const ERROR_NO_MORE_ITEMS: WIN32_ERROR = 259u32;
-pub const ERROR_SUCCESS: WIN32_ERROR = 0u32;
-#[repr(C)]
-pub struct FILETIME {
-    pub dwLowDateTime: u32,
-    pub dwHighDateTime: u32,
-}
-impl ::core::marker::Copy for FILETIME {}
-impl ::core::clone::Clone for FILETIME {
-    fn clone(&self) -> Self {
-        *self
-    }
-}
-#[repr(C)]
-pub struct GUID {
-    pub data1: u32,
-    pub data2: u16,
-    pub data3: u16,
-    pub data4: [u8; 8],
-}
-impl GUID {
-    pub const fn from_u128(uuid: u128) -> Self {
-        Self {
-            data1: (uuid >> 96) as u32,
-            data2: (uuid >> 80 & 0xffff) as u16,
-            data3: (uuid >> 64 & 0xffff) as u16,
-            data4: (uuid as u64).to_be_bytes(),
-        }
-    }
-}
-impl ::core::marker::Copy for GUID {}
-impl ::core::clone::Clone for GUID {
-    fn clone(&self) -> Self {
-        *self
-    }
-}
-pub type HANDLE = *mut ::core::ffi::c_void;
-pub type HKEY = *mut ::core::ffi::c_void;
-pub const HKEY_LOCAL_MACHINE: HKEY = invalid_mut(-2147483646i32 as _);
-pub type HRESULT = i32;
-pub const INVALID_HANDLE_VALUE: HANDLE = invalid_mut(-1i32 as _);
-pub type IUnknown = *mut ::core::ffi::c_void;
-pub const KEY_READ: REG_SAM_FLAGS = 131097u32;
-pub const KEY_WOW64_32KEY: REG_SAM_FLAGS = 512u32;
-pub type PCWSTR = *const u16;
-pub type PWSTR = *mut u16;
-pub type REG_SAM_FLAGS = u32;
-pub const REG_SZ: REG_VALUE_TYPE = 1u32;
-pub type REG_VALUE_TYPE = u32;
-#[repr(C)]
-pub struct SAFEARRAY {
-    pub cDims: u16,
-    pub fFeatures: ADVANCED_FEATURE_FLAGS,
-    pub cbElements: u32,
-    pub cLocks: u32,
-    pub pvData: *mut ::core::ffi::c_void,
-    pub rgsabound: [SAFEARRAYBOUND; 1],
-}
-impl ::core::marker::Copy for SAFEARRAY {}
-impl ::core::clone::Clone for SAFEARRAY {
-    fn clone(&self) -> Self {
-        *self
-    }
-}
-#[repr(C)]
-pub struct SAFEARRAYBOUND {
-    pub cElements: u32,
-    pub lLbound: i32,
-}
-impl ::core::marker::Copy for SAFEARRAYBOUND {}
-impl ::core::clone::Clone for SAFEARRAYBOUND {
-    fn clone(&self) -> Self {
-        *self
-    }
-}
-#[repr(C)]
-pub struct SECURITY_ATTRIBUTES {
-    pub nLength: u32,
-    pub lpSecurityDescriptor: *mut ::core::ffi::c_void,
-    pub bInheritHandle: BOOL,
-}
-impl ::core::marker::Copy for SECURITY_ATTRIBUTES {}
-impl ::core::clone::Clone for SECURITY_ATTRIBUTES {
-    fn clone(&self) -> Self {
-        *self
-    }
-}
-pub const S_FALSE: HRESULT = 1i32;
-pub const S_OK: HRESULT = 0i32;
-pub type WIN32_ERROR = u32;
-
-/// Adapted from
-/// [`core::ptr::invalid_mut()`](https://doc.rust-lang.org/src/core/ptr/mod.rs.html#600-607).
-///
-/// This function should actually use `core::mem::transmute` but due to msrv
-/// we use `as` casting instead.
-///
-/// Once msrv is bumped to 1.56, replace this with `core::mem::transmute` since
-/// it is const stablised in 1.56
-///
-/// NOTE that once supports `strict_provenance` we would also have to update
-/// this.
-const fn invalid_mut<T>(addr: usize) -> *mut T {
-    addr as *mut T
-}
diff --git a/vendor/cc/tests/cc_env.rs b/vendor/cc/tests/cc_env.rs
deleted file mode 100644
index 43eb689..0000000
--- a/vendor/cc/tests/cc_env.rs
+++ /dev/null
@@ -1,118 +0,0 @@
-use std::env;
-use std::ffi::OsString;
-use std::path::Path;
-
-mod support;
-use crate::support::Test;
-
-#[test]
-fn main() {
-    ccache();
-    distcc();
-    ccache_spaces();
-    ccache_env_flags();
-    leading_spaces();
-    extra_flags();
-    path_to_ccache();
-    more_spaces();
-}
-
-fn ccache() {
-    let test = Test::gnu();
-
-    env::set_var("CC", "ccache cc");
-    let compiler = test.gcc().file("foo.c").get_compiler();
-
-    assert_eq!(compiler.path(), Path::new("cc"));
-}
-
-fn ccache_spaces() {
-    let test = Test::gnu();
-    test.shim("ccache");
-
-    env::set_var("CC", "ccache        cc");
-    let compiler = test.gcc().file("foo.c").get_compiler();
-    assert_eq!(compiler.path(), Path::new("cc"));
-}
-
-fn distcc() {
-    let test = Test::gnu();
-    test.shim("distcc");
-
-    env::set_var("CC", "distcc cc");
-    let compiler = test.gcc().file("foo.c").get_compiler();
-    assert_eq!(compiler.path(), Path::new("cc"));
-}
-
-fn ccache_env_flags() {
-    let test = Test::gnu();
-    test.shim("ccache");
-
-    env::set_var("CC", "ccache lol-this-is-not-a-compiler");
-    let compiler = test.gcc().file("foo.c").get_compiler();
-    assert_eq!(compiler.path(), Path::new("lol-this-is-not-a-compiler"));
-    assert_eq!(
-        compiler.cc_env(),
-        OsString::from("ccache lol-this-is-not-a-compiler")
-    );
-    assert!(
-        compiler
-            .cflags_env()
-            .into_string()
-            .unwrap()
-            .contains("ccache")
-            == false
-    );
-    assert!(
-        compiler
-            .cflags_env()
-            .into_string()
-            .unwrap()
-            .contains(" lol-this-is-not-a-compiler")
-            == false
-    );
-
-    env::set_var("CC", "");
-}
-
-fn leading_spaces() {
-    let test = Test::gnu();
-    test.shim("ccache");
-
-    env::set_var("CC", " test ");
-    let compiler = test.gcc().file("foo.c").get_compiler();
-    assert_eq!(compiler.path(), Path::new("test"));
-
-    env::set_var("CC", "");
-}
-
-fn extra_flags() {
-    let test = Test::gnu();
-    test.shim("ccache");
-
-    env::set_var("CC", "ccache cc -m32");
-    let compiler = test.gcc().file("foo.c").get_compiler();
-    assert_eq!(compiler.path(), Path::new("cc"));
-}
-
-fn path_to_ccache() {
-    let test = Test::gnu();
-    test.shim("ccache");
-
-    env::set_var("CC", "/path/to/ccache.exe cc -m32");
-    let compiler = test.gcc().file("foo.c").get_compiler();
-    assert_eq!(compiler.path(), Path::new("cc"));
-    assert_eq!(
-        compiler.cc_env(),
-        OsString::from("/path/to/ccache.exe cc -m32"),
-    );
-}
-
-fn more_spaces() {
-    let test = Test::gnu();
-    test.shim("ccache");
-
-    env::set_var("CC", "cc -m32");
-    let compiler = test.gcc().file("foo.c").get_compiler();
-    assert_eq!(compiler.path(), Path::new("cc"));
-}
diff --git a/vendor/cc/tests/cflags.rs b/vendor/cc/tests/cflags.rs
deleted file mode 100644
index caec6ea..0000000
--- a/vendor/cc/tests/cflags.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-mod support;
-
-use crate::support::Test;
-use std::env;
-
-/// This test is in its own module because it modifies the environment and would affect other tests
-/// when run in parallel with them.
-#[test]
-fn gnu_no_warnings_if_cflags() {
-    env::set_var("CFLAGS", "-arbitrary");
-    let test = Test::gnu();
-    test.gcc().file("foo.c").compile("foo");
-
-    test.cmd(0).must_not_have("-Wall").must_not_have("-Wextra");
-}
diff --git a/vendor/cc/tests/cxxflags.rs b/vendor/cc/tests/cxxflags.rs
deleted file mode 100644
index c524c7d..0000000
--- a/vendor/cc/tests/cxxflags.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-mod support;
-
-use crate::support::Test;
-use std::env;
-
-/// This test is in its own module because it modifies the environment and would affect other tests
-/// when run in parallel with them.
-#[test]
-fn gnu_no_warnings_if_cxxflags() {
-    env::set_var("CXXFLAGS", "-arbitrary");
-    let test = Test::gnu();
-    test.gcc().file("foo.cpp").cpp(true).compile("foo");
-
-    test.cmd(0).must_not_have("-Wall").must_not_have("-Wextra");
-}
diff --git a/vendor/cc/tests/support/mod.rs b/vendor/cc/tests/support/mod.rs
deleted file mode 100644
index f3c0440..0000000
--- a/vendor/cc/tests/support/mod.rs
+++ /dev/null
@@ -1,172 +0,0 @@
-#![allow(dead_code)]
-
-use std::env;
-use std::ffi::{OsStr, OsString};
-use std::fs::{self, File};
-use std::io;
-use std::io::prelude::*;
-use std::path::{Path, PathBuf};
-
-use cc;
-use tempfile::{Builder, TempDir};
-
-pub struct Test {
-    pub td: TempDir,
-    pub gcc: PathBuf,
-    pub msvc: bool,
-}
-
-pub struct Execution {
-    args: Vec<String>,
-}
-
-impl Test {
-    pub fn new() -> Test {
-        // This is ugly: `sccache` needs to introspect the compiler it is
-        // executing, as it adjusts its behavior depending on the
-        // language/compiler. This crate's test driver uses mock compilers that
-        // are obviously not supported by sccache, so the tests fail if
-        // RUSTC_WRAPPER is set. rust doesn't build test dependencies with
-        // the `test` feature enabled, so we can't conditionally disable the
-        // usage of `sccache` if running in a test environment, at least not
-        // without setting an environment variable here and testing for it
-        // there. Explicitly deasserting RUSTC_WRAPPER here seems to be the
-        // lesser of the two evils.
-        env::remove_var("RUSTC_WRAPPER");
-
-        let mut gcc = PathBuf::from(env::current_exe().unwrap());
-        gcc.pop();
-        if gcc.ends_with("deps") {
-            gcc.pop();
-        }
-        let td = Builder::new().prefix("gcc-test").tempdir_in(&gcc).unwrap();
-        gcc.push(format!("gcc-shim{}", env::consts::EXE_SUFFIX));
-        Test {
-            td: td,
-            gcc: gcc,
-            msvc: false,
-        }
-    }
-
-    pub fn gnu() -> Test {
-        let t = Test::new();
-        t.shim("cc").shim("c++").shim("ar");
-        t
-    }
-
-    pub fn msvc() -> Test {
-        let mut t = Test::new();
-        t.shim("cl").shim("lib.exe");
-        t.msvc = true;
-        t
-    }
-
-    pub fn shim(&self, name: &str) -> &Test {
-        let name = if name.ends_with(env::consts::EXE_SUFFIX) {
-            name.to_string()
-        } else {
-            format!("{}{}", name, env::consts::EXE_SUFFIX)
-        };
-        link_or_copy(&self.gcc, self.td.path().join(name)).unwrap();
-        self
-    }
-
-    pub fn gcc(&self) -> cc::Build {
-        let mut cfg = cc::Build::new();
-        let target = if self.msvc {
-            "x86_64-pc-windows-msvc"
-        } else {
-            "x86_64-unknown-linux-gnu"
-        };
-
-        cfg.target(target)
-            .host(target)
-            .opt_level(2)
-            .debug(false)
-            .out_dir(self.td.path())
-            .__set_env("PATH", self.path())
-            .__set_env("GCCTEST_OUT_DIR", self.td.path());
-        if self.msvc {
-            cfg.compiler(self.td.path().join("cl"));
-            cfg.archiver(self.td.path().join("lib.exe"));
-        }
-        cfg
-    }
-
-    fn path(&self) -> OsString {
-        let mut path = env::split_paths(&env::var_os("PATH").unwrap()).collect::<Vec<_>>();
-        path.insert(0, self.td.path().to_owned());
-        env::join_paths(path).unwrap()
-    }
-
-    pub fn cmd(&self, i: u32) -> Execution {
-        let mut s = String::new();
-        File::open(self.td.path().join(format!("out{}", i)))
-            .unwrap()
-            .read_to_string(&mut s)
-            .unwrap();
-        Execution {
-            args: s.lines().map(|s| s.to_string()).collect(),
-        }
-    }
-}
-
-impl Execution {
-    pub fn must_have<P: AsRef<OsStr>>(&self, p: P) -> &Execution {
-        if !self.has(p.as_ref()) {
-            panic!("didn't find {:?} in {:?}", p.as_ref(), self.args);
-        } else {
-            self
-        }
-    }
-
-    pub fn must_not_have<P: AsRef<OsStr>>(&self, p: P) -> &Execution {
-        if self.has(p.as_ref()) {
-            panic!("found {:?}", p.as_ref());
-        } else {
-            self
-        }
-    }
-
-    pub fn has(&self, p: &OsStr) -> bool {
-        self.args.iter().any(|arg| OsStr::new(arg) == p)
-    }
-
-    pub fn must_have_in_order(&self, before: &str, after: &str) -> &Execution {
-        let before_position = self
-            .args
-            .iter()
-            .rposition(|x| OsStr::new(x) == OsStr::new(before));
-        let after_position = self
-            .args
-            .iter()
-            .rposition(|x| OsStr::new(x) == OsStr::new(after));
-        match (before_position, after_position) {
-            (Some(b), Some(a)) if b < a => {}
-            (b, a) => panic!(
-                "{:?} (last position: {:?}) did not appear before {:?} (last position: {:?})",
-                before, b, after, a
-            ),
-        };
-        self
-    }
-}
-
-/// Hard link an executable or copy it if that fails.
-///
-/// We first try to hard link an executable to save space. If that fails (as on Windows with
-/// different mount points, issue #60), we copy.
-#[cfg(not(target_os = "macos"))]
-fn link_or_copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<()> {
-    let from = from.as_ref();
-    let to = to.as_ref();
-    fs::hard_link(from, to).or_else(|_| fs::copy(from, to).map(|_| ()))
-}
-
-/// Copy an executable.
-///
-/// On macOS, hard linking the executable leads to strange failures (issue #419), so we just copy.
-#[cfg(target_os = "macos")]
-fn link_or_copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<()> {
-    fs::copy(from, to).map(|_| ())
-}
diff --git a/vendor/cc/tests/test.rs b/vendor/cc/tests/test.rs
deleted file mode 100644
index 7f1ddb2..0000000
--- a/vendor/cc/tests/test.rs
+++ /dev/null
@@ -1,477 +0,0 @@
-use crate::support::Test;
-
-mod support;
-
-// Some tests check that a flag is *not* present.  These tests might fail if the flag is set in the
-// CFLAGS or CXXFLAGS environment variables.  This function clears the CFLAGS and CXXFLAGS
-// variables to make sure that the tests can run correctly.
-fn reset_env() {
-    std::env::set_var("CFLAGS", "");
-    std::env::set_var("CXXFLAGS", "");
-}
-
-#[test]
-fn gnu_smoke() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc().file("foo.c").compile("foo");
-
-    test.cmd(0)
-        .must_have("-O2")
-        .must_have("foo.c")
-        .must_not_have("-gdwarf-4")
-        .must_have("-c")
-        .must_have("-ffunction-sections")
-        .must_have("-fdata-sections");
-    test.cmd(1).must_have(test.td.path().join("foo.o"));
-}
-
-#[test]
-fn gnu_opt_level_1() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc().opt_level(1).file("foo.c").compile("foo");
-
-    test.cmd(0).must_have("-O1").must_not_have("-O2");
-}
-
-#[test]
-fn gnu_opt_level_s() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc().opt_level_str("s").file("foo.c").compile("foo");
-
-    test.cmd(0)
-        .must_have("-Os")
-        .must_not_have("-O1")
-        .must_not_have("-O2")
-        .must_not_have("-O3")
-        .must_not_have("-Oz");
-}
-
-#[test]
-fn gnu_debug() {
-    let test = Test::gnu();
-    test.gcc().debug(true).file("foo.c").compile("foo");
-    test.cmd(0).must_have("-gdwarf-4");
-
-    let test = Test::gnu();
-    test.gcc()
-        .target("x86_64-apple-darwin")
-        .debug(true)
-        .file("foo.c")
-        .compile("foo");
-    test.cmd(0).must_have("-gdwarf-2");
-}
-
-#[test]
-fn gnu_debug_fp_auto() {
-    let test = Test::gnu();
-    test.gcc().debug(true).file("foo.c").compile("foo");
-    test.cmd(0).must_have("-gdwarf-4");
-    test.cmd(0).must_have("-fno-omit-frame-pointer");
-}
-
-#[test]
-fn gnu_debug_fp() {
-    let test = Test::gnu();
-    test.gcc().debug(true).file("foo.c").compile("foo");
-    test.cmd(0).must_have("-gdwarf-4");
-    test.cmd(0).must_have("-fno-omit-frame-pointer");
-}
-
-#[test]
-fn gnu_debug_nofp() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc()
-        .debug(true)
-        .force_frame_pointer(false)
-        .file("foo.c")
-        .compile("foo");
-    test.cmd(0).must_have("-gdwarf-4");
-    test.cmd(0).must_not_have("-fno-omit-frame-pointer");
-
-    let test = Test::gnu();
-    test.gcc()
-        .force_frame_pointer(false)
-        .debug(true)
-        .file("foo.c")
-        .compile("foo");
-    test.cmd(0).must_have("-gdwarf-4");
-    test.cmd(0).must_not_have("-fno-omit-frame-pointer");
-}
-
-#[test]
-fn gnu_warnings_into_errors() {
-    let test = Test::gnu();
-    test.gcc()
-        .warnings_into_errors(true)
-        .file("foo.c")
-        .compile("foo");
-
-    test.cmd(0).must_have("-Werror");
-}
-
-#[test]
-fn gnu_warnings() {
-    let test = Test::gnu();
-    test.gcc()
-        .warnings(true)
-        .flag("-Wno-missing-field-initializers")
-        .file("foo.c")
-        .compile("foo");
-
-    test.cmd(0).must_have("-Wall").must_have("-Wextra");
-}
-
-#[test]
-fn gnu_extra_warnings0() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc()
-        .warnings(true)
-        .extra_warnings(false)
-        .flag("-Wno-missing-field-initializers")
-        .file("foo.c")
-        .compile("foo");
-
-    test.cmd(0).must_have("-Wall").must_not_have("-Wextra");
-}
-
-#[test]
-fn gnu_extra_warnings1() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc()
-        .warnings(false)
-        .extra_warnings(true)
-        .flag("-Wno-missing-field-initializers")
-        .file("foo.c")
-        .compile("foo");
-
-    test.cmd(0).must_not_have("-Wall").must_have("-Wextra");
-}
-
-#[test]
-fn gnu_warnings_overridable() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc()
-        .warnings(true)
-        .flag("-Wno-missing-field-initializers")
-        .file("foo.c")
-        .compile("foo");
-
-    test.cmd(0)
-        .must_have_in_order("-Wall", "-Wno-missing-field-initializers");
-}
-
-#[test]
-fn gnu_x86_64() {
-    for vendor in &["unknown-linux-gnu", "apple-darwin"] {
-        let target = format!("x86_64-{}", vendor);
-        let test = Test::gnu();
-        test.gcc()
-            .target(&target)
-            .host(&target)
-            .file("foo.c")
-            .compile("foo");
-
-        test.cmd(0).must_have("-fPIC").must_have("-m64");
-    }
-}
-
-#[test]
-fn gnu_x86_64_no_pic() {
-    reset_env();
-
-    for vendor in &["unknown-linux-gnu", "apple-darwin"] {
-        let target = format!("x86_64-{}", vendor);
-        let test = Test::gnu();
-        test.gcc()
-            .pic(false)
-            .target(&target)
-            .host(&target)
-            .file("foo.c")
-            .compile("foo");
-
-        test.cmd(0).must_not_have("-fPIC");
-    }
-}
-
-#[test]
-fn gnu_i686() {
-    for vendor in &["unknown-linux-gnu", "apple-darwin"] {
-        let target = format!("i686-{}", vendor);
-        let test = Test::gnu();
-        test.gcc()
-            .target(&target)
-            .host(&target)
-            .file("foo.c")
-            .compile("foo");
-
-        test.cmd(0).must_have("-m32");
-    }
-}
-
-#[test]
-fn gnu_i686_pic() {
-    for vendor in &["unknown-linux-gnu", "apple-darwin"] {
-        let target = format!("i686-{}", vendor);
-        let test = Test::gnu();
-        test.gcc()
-            .pic(true)
-            .target(&target)
-            .host(&target)
-            .file("foo.c")
-            .compile("foo");
-
-        test.cmd(0).must_have("-fPIC");
-    }
-}
-
-#[test]
-fn gnu_x86_64_no_plt() {
-    let target = "x86_64-unknown-linux-gnu";
-    let test = Test::gnu();
-    test.gcc()
-        .pic(true)
-        .use_plt(false)
-        .target(&target)
-        .host(&target)
-        .file("foo.c")
-        .compile("foo");
-    test.cmd(0).must_have("-fno-plt");
-}
-
-#[test]
-fn gnu_set_stdlib() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc()
-        .cpp_set_stdlib(Some("foo"))
-        .file("foo.c")
-        .compile("foo");
-
-    test.cmd(0).must_not_have("-stdlib=foo");
-}
-
-#[test]
-fn gnu_include() {
-    let test = Test::gnu();
-    test.gcc().include("foo/bar").file("foo.c").compile("foo");
-
-    test.cmd(0).must_have("-I").must_have("foo/bar");
-}
-
-#[test]
-fn gnu_define() {
-    let test = Test::gnu();
-    test.gcc()
-        .define("FOO", "bar")
-        .define("BAR", None)
-        .file("foo.c")
-        .compile("foo");
-
-    test.cmd(0).must_have("-DFOO=bar").must_have("-DBAR");
-}
-
-#[test]
-fn gnu_compile_assembly() {
-    let test = Test::gnu();
-    test.gcc().file("foo.S").compile("foo");
-    test.cmd(0).must_have("foo.S");
-}
-
-#[test]
-fn gnu_shared() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc()
-        .file("foo.c")
-        .shared_flag(true)
-        .static_flag(false)
-        .compile("foo");
-
-    test.cmd(0).must_have("-shared").must_not_have("-static");
-}
-
-#[test]
-fn gnu_flag_if_supported() {
-    reset_env();
-
-    if cfg!(windows) {
-        return;
-    }
-    let test = Test::gnu();
-    test.gcc()
-        .file("foo.c")
-        .flag("-v")
-        .flag_if_supported("-Wall")
-        .flag_if_supported("-Wflag-does-not-exist")
-        .flag_if_supported("-std=c++11")
-        .compile("foo");
-
-    test.cmd(0)
-        .must_have("-v")
-        .must_have("-Wall")
-        .must_not_have("-Wflag-does-not-exist")
-        .must_not_have("-std=c++11");
-}
-
-#[test]
-fn gnu_flag_if_supported_cpp() {
-    if cfg!(windows) {
-        return;
-    }
-    let test = Test::gnu();
-    test.gcc()
-        .cpp(true)
-        .file("foo.cpp")
-        .flag_if_supported("-std=c++11")
-        .compile("foo");
-
-    test.cmd(0).must_have("-std=c++11");
-}
-
-#[test]
-fn gnu_static() {
-    reset_env();
-
-    let test = Test::gnu();
-    test.gcc()
-        .file("foo.c")
-        .shared_flag(false)
-        .static_flag(true)
-        .compile("foo");
-
-    test.cmd(0).must_have("-static").must_not_have("-shared");
-}
-
-#[test]
-fn gnu_no_dash_dash() {
-    let test = Test::gnu();
-    test.gcc().file("foo.c").compile("foo");
-
-    test.cmd(0).must_not_have("--");
-}
-
-#[test]
-fn gnu_std_c() {
-    let test = Test::gnu();
-    test.gcc().file("foo.c").std("c11").compile("foo");
-
-    test.cmd(0).must_have("-std=c11");
-}
-
-#[test]
-fn msvc_smoke() {
-    reset_env();
-
-    let test = Test::msvc();
-    test.gcc().file("foo.c").compile("foo");
-
-    test.cmd(0)
-        .must_have("-O2")
-        .must_have("foo.c")
-        .must_not_have("-Z7")
-        .must_have("-c")
-        .must_have("-MD");
-    test.cmd(1).must_have(test.td.path().join("foo.o"));
-}
-
-#[test]
-fn msvc_opt_level_0() {
-    reset_env();
-
-    let test = Test::msvc();
-    test.gcc().opt_level(0).file("foo.c").compile("foo");
-
-    test.cmd(0).must_not_have("-O2");
-}
-
-#[test]
-fn msvc_debug() {
-    let test = Test::msvc();
-    test.gcc().debug(true).file("foo.c").compile("foo");
-    test.cmd(0).must_have("-Z7");
-}
-
-#[test]
-fn msvc_include() {
-    let test = Test::msvc();
-    test.gcc().include("foo/bar").file("foo.c").compile("foo");
-
-    test.cmd(0).must_have("-I").must_have("foo/bar");
-}
-
-#[test]
-fn msvc_define() {
-    let test = Test::msvc();
-    test.gcc()
-        .define("FOO", "bar")
-        .define("BAR", None)
-        .file("foo.c")
-        .compile("foo");
-
-    test.cmd(0).must_have("-DFOO=bar").must_have("-DBAR");
-}
-
-#[test]
-fn msvc_static_crt() {
-    let test = Test::msvc();
-    test.gcc().static_crt(true).file("foo.c").compile("foo");
-
-    test.cmd(0).must_have("-MT");
-}
-
-#[test]
-fn msvc_no_static_crt() {
-    let test = Test::msvc();
-    test.gcc().static_crt(false).file("foo.c").compile("foo");
-
-    test.cmd(0).must_have("-MD");
-}
-
-#[test]
-fn msvc_no_dash_dash() {
-    let test = Test::msvc();
-    test.gcc().file("foo.c").compile("foo");
-
-    test.cmd(0).must_not_have("--");
-}
-
-#[test]
-fn msvc_std_c() {
-    let test = Test::msvc();
-    test.gcc().file("foo.c").std("c11").compile("foo");
-
-    test.cmd(0).must_have("-std:c11");
-}
-
-// Disable this test with the parallel feature because the execution
-// order is not deterministic.
-#[cfg(not(feature = "parallel"))]
-#[test]
-fn asm_flags() {
-    let test = Test::gnu();
-    test.gcc()
-        .file("foo.c")
-        .file("x86_64.asm")
-        .file("x86_64.S")
-        .asm_flag("--abc")
-        .compile("foo");
-    test.cmd(0).must_not_have("--abc");
-    test.cmd(1).must_have("--abc");
-    test.cmd(2).must_have("--abc");
-}