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compiler-builtins: Emit rustc-check-cfg earlier

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The `build.rs` entrypoint returns early for some targets, so emscripten
and OpenBSD were not getting check-cfg set. Emit these earlier to avoid
the `unexpected_cfgs` lint.
This commit is contained in:
Trevor Gross 2025-06-09 04:10:24 +00:00
parent f131c2fa47
commit fc71544932
1 changed files with 3 additions and 2 deletions
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5
library/compiler-builtins/compiler-builtins/build.rs
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@ -22,6 +22,9 @@ fn main() {
println!("cargo:compiler-rt={}", cwd.join("compiler-rt").display());
println!("cargo::rustc-check-cfg=cfg(kernel_user_helpers)");
println!("cargo::rustc-check-cfg=cfg(feature, values(\"mem-unaligned\"))");
// Emscripten's runtime includes all the builtins
if target.os == "emscripten" {
return;
@ -47,7 +50,6 @@ fn main() {
}
// These targets have hardware unaligned access support.
println!("cargo::rustc-check-cfg=cfg(feature, values(\"mem-unaligned\"))");
if target.arch.contains("x86_64")
|| target.arch.contains("x86")
|| target.arch.contains("aarch64")
@ -78,7 +80,6 @@ fn main() {
// Only emit the ARM Linux atomic emulation on pre-ARMv6 architectures. This
// includes the old androideabi. It is deprecated but it is available as a
// rustc target (arm-linux-androideabi).
println!("cargo::rustc-check-cfg=cfg(kernel_user_helpers)");
if llvm_target[0] == "armv4t"
|| llvm_target[0] == "armv5te"
|| target.triple == "arm-linux-androideabi"