[clang] [Clang] Don't use crtbegin/crtend when building for musl. (PR #85089)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Alastair Houghton (al45tair)

<details>
<summary>Changes</summary>

musl doesn't supply crtbegin/crtend objects, so we don't want to try to link them there.

rdar://123436174

---
Full diff: https://github.com/llvm/llvm-project/pull/85089.diff


1 Files Affected:

- (modified) clang/lib/Driver/ToolChains/Gnu.cpp (+4-2) 


``````````diff
diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index a9c9d2475809d7..7b7d9194a773ec 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -371,13 +371,15 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   const llvm::Triple::ArchType Arch = ToolChain.getArch();
   const bool isOHOSFamily = ToolChain.getTriple().isOHOSFamily();
   const bool isAndroid = ToolChain.getTriple().isAndroid();
+  const bool isMusl = ToolChain.getTriple().isMusl();
   const bool IsIAMCU = ToolChain.getTriple().isOSIAMCU();
   const bool IsVE = ToolChain.getTriple().isVE();
   const bool IsStaticPIE = getStaticPIE(Args, ToolChain);
   const bool IsStatic = getStatic(Args);
   const bool HasCRTBeginEndFiles =
-      ToolChain.getTriple().hasEnvironment() ||
-      (ToolChain.getTriple().getVendor() != llvm::Triple::MipsTechnologies);
+    !isMusl && (ToolChain.getTriple().hasEnvironment() ||
+                (ToolChain.getTriple().getVendor()
+                 != llvm::Triple::MipsTechnologies));
 
   ArgStringList CmdArgs;
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/85089