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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
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-autocfg
-=======
-
-[![autocfg crate](https://img.shields.io/crates/v/autocfg.svg)](https://crates.io/crates/autocfg)
-[![autocfg documentation](https://docs.rs/autocfg/badge.svg)](https://docs.rs/autocfg)
-![minimum rustc 1.0](https://img.shields.io/badge/rustc-1.0+-red.svg)
-![build status](https://github.com/cuviper/autocfg/workflows/master/badge.svg)
-
-A Rust library for build scripts to automatically configure code based on
-compiler support. Code snippets are dynamically tested to see if the `rustc`
-will accept them, rather than hard-coding specific version support.
-
-
-## Usage
-
-Add this to your `Cargo.toml`:
-
-```toml
-[build-dependencies]
-autocfg = "1"
-```
-
-Then use it in your `build.rs` script to detect compiler features. For
-example, to test for 128-bit integer support, it might look like:
-
-```rust
-extern crate autocfg;
-
-fn main() {
- let ac = autocfg::new();
- ac.emit_has_type("i128");
-
- // (optional) We don't need to rerun for anything external.
- autocfg::rerun_path("build.rs");
-}
-```
-
-If the type test succeeds, this will write a `cargo:rustc-cfg=has_i128` line
-for Cargo, which translates to Rust arguments `--cfg has_i128`. Then in the
-rest of your Rust code, you can add `#[cfg(has_i128)]` conditions on code that
-should only be used when the compiler supports it.
-
-
-## Release Notes
-
-- 1.1.0 (2022-02-07)
- - Use `CARGO_ENCODED_RUSTFLAGS` when it is set.
-
-- 1.0.1 (2020-08-20)
- - Apply `RUSTFLAGS` for more `--target` scenarios, by @adamreichold.
-
-- 1.0.0 (2020-01-08)
- - 🎉 Release 1.0! 🎉 (no breaking changes)
- - Add `probe_expression` and `emit_expression_cfg` to test arbitrary expressions.
- - Add `probe_constant` and `emit_constant_cfg` to test arbitrary constant expressions.
-
-- 0.1.7 (2019-10-20)
- - Apply `RUSTFLAGS` when probing `$TARGET != $HOST`, mainly for sysroot, by @roblabla.
-
-- 0.1.6 (2019-08-19)
- - Add `probe`/`emit_sysroot_crate`, by @leo60228.
-
-- 0.1.5 (2019-07-16)
- - Mask some warnings from newer rustc.
-
-- 0.1.4 (2019-05-22)
- - Relax `std`/`no_std` probing to a warning instead of an error.
- - Improve `rustc` bootstrap compatibility.
-
-- 0.1.3 (2019-05-21)
- - Auto-detects if `#![no_std]` is needed for the `$TARGET`.
-
-- 0.1.2 (2019-01-16)
- - Add `rerun_env(ENV)` to print `cargo:rerun-if-env-changed=ENV`.
- - Add `rerun_path(PATH)` to print `cargo:rerun-if-changed=PATH`.
-
-
-## Minimum Rust version policy
-
-This crate's minimum supported `rustc` version is `1.0.0`. Compatibility is
-its entire reason for existence, so this crate will be extremely conservative
-about raising this requirement. If this is ever deemed necessary, it will be
-treated as a major breaking change for semver purposes.
-
-
-## License
-
-This project is licensed under either of
-
- * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
- http://www.apache.org/licenses/LICENSE-2.0)
- * MIT license ([LICENSE-MIT](LICENSE-MIT) or
- http://opensource.org/licenses/MIT)
-
-at your option.