openharmony/third_party_rust_rustix
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Optimize the build.rs program.

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Avoid doing feature tests for features that won't be needed. This
significantly speeds up the speed of the build script.
This commit is contained in:
Dan Gohman
2022-01-27 12:56:30 -08:00
parent 1665ae9140
commit dedc85afc1
1 changed files with 10 additions and 8 deletions
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build.rs
+10 -8
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@@ -11,12 +11,17 @@ fn main() {
// the rustc version.
println!("cargo:rerun-if-changed=build.rs");
use_feature_or_nothing("vec_into_raw_parts");
use_feature_or_nothing("toowned_clone_into");
use_feature_or_nothing("rustc_attrs");
use_feature_or_nothing("specialization");
use_feature_or_nothing("slice_internals");
use_feature_or_nothing("const_raw_ptr_deref");
// Features only used in no-std configurations.
#[cfg(not(feature = "std"))]
{
use_feature_or_nothing("vec_into_raw_parts");
use_feature_or_nothing("toowned_clone_into");
use_feature_or_nothing("specialization");
use_feature_or_nothing("slice_internals");
use_feature_or_nothing("const_raw_ptr_deref");
}
let arch = var("CARGO_CFG_TARGET_ARCH").unwrap();
let asm_name = format!("{}/{}.s", OUTLINE_PATH, arch);
@@ -34,10 +39,7 @@ fn main() {
use_feature("libc");
} else {
use_feature("linux_raw");
use_feature_or_nothing("core_intrinsics");
use_feature_or_nothing("doc_cfg");
use_feature_or_else("asm", || {
link_in_librustix_outline(&arch, &asm_name);
});