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authorbors <bors@rust-lang.org>2024-04-12 18:16:47 +0000
committerbors <bors@rust-lang.org>2024-04-12 18:16:47 +0000
commit22a2425c106c06a87f4b087e86153629b1da0d1c (patch)
treee639329e941be33a581c8b6c3d59997bf387c004
parent322e92bdaee73946b8b78d1fb6d9c808ce1436e9 (diff)
parentf1548ec94dcc32634a607389765f76f51cd94eee (diff)
downloadrust-22a2425c106c06a87f4b087e86153629b1da0d1c.tar.gz
rust-22a2425c106c06a87f4b087e86153629b1da0d1c.zip
Auto merge of #121426 - madsmtm:remove-cc-syslibroot, r=pnkfelix
Remove redundant `-Wl,-syslibroot`

Since `-isysroot` is set, [Clang already passes this when invoking the linker](https://github.com/llvm/llvm-project/blob/llvmorg-17.0.6/clang/lib/Driver/ToolChains/Darwin.cpp#L439-L442).

See https://github.com/rust-lang/rust/pull/56833 for when the `-isysroot` was originally added, but didn't remove the unnecessary linker flag.

CC `@BlackHoleFox`
r? shepmaster
-rw-r--r--compiler/rustc_codegen_ssa/src/back/link.rs8
1 files changed, 7 insertions, 1 deletions
diff --git a/compiler/rustc_codegen_ssa/src/back/link.rs b/compiler/rustc_codegen_ssa/src/back/link.rs
index f4374392b9b..894afc25ef2 100644
--- a/compiler/rustc_codegen_ssa/src/back/link.rs
+++ b/compiler/rustc_codegen_ssa/src/back/link.rs
@@ -2987,7 +2987,13 @@ fn add_apple_sdk(cmd: &mut dyn Linker, sess: &Session, flavor: LinkerFlavor) {
 
     match flavor {
         LinkerFlavor::Darwin(Cc::Yes, _) => {
-            cmd.args(&["-isysroot", &sdk_root, "-Wl,-syslibroot", &sdk_root]);
+            // Use `-isysroot` instead of `--sysroot`, as only the former
+            // makes Clang treat it as a platform SDK.
+            //
+            // This is admittedly a bit strange, as on most targets
+            // `-isysroot` only applies to include header files, but on Apple
+            // targets this also applies to libraries and frameworks.
+            cmd.args(&["-isysroot", &sdk_root]);
         }
         LinkerFlavor::Darwin(Cc::No, _) => {
             cmd.args(&["-syslibroot", &sdk_root]);