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We use cargo vendor to generate a .cargo/config file and the vendor directory. Vendoring allows us to lock our dependencies and to modify them easily from the top level Cargo.toml. We vendor all dependencies, including the crates.io ones, which allows for network isolated builds. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> |
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.. | ||
examples | ||
src | ||
.cargo-checksum.json | ||
Cargo.toml | ||
LICENSE-APACHE | ||
LICENSE-MIT | ||
README.md |
autocfg
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
:
[build-dependencies]
autocfg = "0.1"
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:
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(file!());
}
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
-
0.1.4 (2019-05-22)
- Relax
std
/no_std
probing to a warning instead of an error. - Improve
rustc
bootstrap compatibility.
- Relax
-
0.1.3 (2019-05-21)
- Auto-detects if
#![no_std]
is needed for the$TARGET
- Auto-detects if
-
0.1.2 (2018-01-16)
- Add
rerun_env(ENV)
to printcargo:rerun-if-env-changed=ENV
- Add
rerun_path(PATH)
to printcargo:rerun-if-changed=PATH
- Add
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 or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.