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-rw-r--r--compiler/rustc_llvm/build.rs17
1 files changed, 15 insertions, 2 deletions
diff --git a/compiler/rustc_llvm/build.rs b/compiler/rustc_llvm/build.rs
index 9a6549379d3..d01f79dcade 100644
--- a/compiler/rustc_llvm/build.rs
+++ b/compiler/rustc_llvm/build.rs
@@ -106,6 +106,10 @@ fn output(cmd: &mut Command) -> String {
 }
 
 fn main() {
+    if cfg!(feature = "check_only") {
+        return;
+    }
+
     for component in REQUIRED_COMPONENTS.iter().chain(OPTIONAL_COMPONENTS.iter()) {
         println!("cargo:rustc-check-cfg=cfg(llvm_component,values(\"{component}\"))");
     }
@@ -167,6 +171,16 @@ fn main() {
     let cxxflags = output(&mut cmd);
     let mut cfg = cc::Build::new();
     cfg.warnings(false);
+
+    // Prevent critical warnings when we're compiling from rust-lang/rust CI,
+    // except on MSVC, as the compiler throws warnings that are only reported
+    // for this platform. See https://github.com/rust-lang/rust/pull/145031#issuecomment-3162677202
+    // FIXME(llvm22): It looks like the specific problem code has been removed
+    // in https://github.com/llvm/llvm-project/commit/e8fc808bf8e78a3c80d1f8e293a92677b92366dd,
+    // retry msvc once we bump our LLVM version.
+    if std::env::var_os("CI").is_some() && !target.contains("msvc") {
+        cfg.warnings_into_errors(true);
+    }
     for flag in cxxflags.split_whitespace() {
         // Ignore flags like `-m64` when we're doing a cross build
         if is_crossed && flag.starts_with("-m") {
@@ -212,7 +226,6 @@ fn main() {
     rerun_if_changed_anything_in_dir(Path::new("llvm-wrapper"));
     cfg.file("llvm-wrapper/PassWrapper.cpp")
         .file("llvm-wrapper/RustWrapper.cpp")
-        .file("llvm-wrapper/ArchiveWrapper.cpp")
         .file("llvm-wrapper/CoverageMappingWrapper.cpp")
         .file("llvm-wrapper/SymbolWrapper.cpp")
         .file("llvm-wrapper/Linker.cpp")
@@ -241,7 +254,7 @@ fn main() {
         println!("cargo:rustc-link-lib=kstat");
     }
 
-    if (target.starts_with("arm") && !target.contains("freebsd")) && !target.contains("ohos")
+    if (target.starts_with("arm") && !target.contains("freebsd") && !target.contains("ohos"))
         || target.starts_with("mips-")
         || target.starts_with("mipsel-")
         || target.starts_with("powerpc-")