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Use an allow-list of platforms that support std.

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Use a fall-through for no_std targets.
This commit is contained in:
Eric Huss 2020-07-06 20:31:12 -07:00
parent cee9f05c2d
commit 0eb293ddb7
3 changed files with 62 additions and 20 deletions
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26
src/libstd/build.rs
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@ -62,9 +62,29 @@ fn main() {
}
println!("cargo:rustc-link-lib=c");
println!("cargo:rustc-link-lib=compiler_rt");
}
println!("cargo:rustc-env=STD_ENV_ARCH={}", env::var("CARGO_CFG_TARGET_ARCH").unwrap());
if target.contains("-none") || target.contains("nvptx") {
} else if (target.contains("sgx") && target.contains("fortanix"))
|| target.contains("hermit")
|| target.contains("l4re")
|| target.contains("redox")
|| target.contains("haiku")
|| target.contains("vxworks")
|| target.contains("wasm32")
|| target.contains("asmjs")
{
// These platforms don't have any special requirements.
} else {
// This is for Cargo's build-std support, to mark std as unstable for
// typically no_std platforms.
// This covers:
// - os=none ("bare metal" targets)
// - mipsel-sony-psp
// - nvptx64-nvidia-cuda
// - avr-unknown-unknown
// - tvos (aarch64-apple-tvos, x86_64-apple-tvos)
// - uefi (x86_64-unknown-uefi, i686-unknown-uefi)
// - JSON targets
// - Any new targets that have not been explicitly added above.
println!("cargo:rustc-cfg=feature=\"restricted-std\"");
}
println!("cargo:rustc-env=STD_ENV_ARCH={}", env::var("CARGO_CFG_TARGET_ARCH").unwrap());
}