llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

<details>
<summary>Changes</summary>

Similar to the Gnu toolchain, ignore uses of '-stdlib=libc++' when linking C 
code. CMake insists on adding it to the command line when linking C, and a 
bunch of other build systems to similarly.

---
Full diff: https://github.com/llvm/llvm-project/pull/68011.diff


1 Files Affected:

- (modified) clang/lib/Driver/ToolChains/FreeBSD.cpp (+3) 


``````````diff
diff --git a/clang/lib/Driver/ToolChains/FreeBSD.cpp 
b/clang/lib/Driver/ToolChains/FreeBSD.cpp
index ff4d94c56f0d0ff..4d998e884f8ad42 100644
--- a/clang/lib/Driver/ToolChains/FreeBSD.cpp
+++ b/clang/lib/Driver/ToolChains/FreeBSD.cpp
@@ -356,6 +356,9 @@ void freebsd::Linker::ConstructJob(Compilation &C, const 
JobAction &JA,
 
   ToolChain.addProfileRTLibs(Args, CmdArgs);
 
+  // Silence warnings when linking C code with a C++ '-stdlib' argument.
+  Args.ClaimAllArgs(options::OPT_stdlib_EQ);
+
   const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
   C.addCommand(std::make_unique<Command>(JA, *this,
                                          ResponseFileSupport::AtFileCurCP(),

``````````

</details>


https://github.com/llvm/llvm-project/pull/68011
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