[clang] [Cygwin] Cygwin basic support (PR #76943)

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=?utf-8?b?5b6Q5oyB5oGS?= Xu Chiheng,=?utf-8?b?5b6Q5oyB5oGS?= Xu Chiheng
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/76943 at github.com>


llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: 徐持恒 Xu Chiheng (xu-chiheng)

<details>
<summary>Changes</summary>

Enable TLS, and set VaListKind to CharPtrBuiltinVaList.
This fix bootstrap failure on Cygwin.

---
Full diff: https://github.com/llvm/llvm-project/pull/76943.diff


1 Files Affected:

- (modified) clang/lib/Basic/Targets/X86.h (+4-1) 


``````````diff
diff --git a/clang/lib/Basic/Targets/X86.h b/clang/lib/Basic/Targets/X86.h
index 0ab1c10833db26..e77e1e690cfc0c 100644
--- a/clang/lib/Basic/Targets/X86.h
+++ b/clang/lib/Basic/Targets/X86.h
@@ -905,7 +905,6 @@ class LLVM_LIBRARY_VISIBILITY CygwinX86_64TargetInfo : public X86_64TargetInfo {
   CygwinX86_64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
       : X86_64TargetInfo(Triple, Opts) {
     this->WCharType = TargetInfo::UnsignedShort;
-    TLSSupported = false;
   }
 
   void getTargetDefines(const LangOptions &Opts,
@@ -919,6 +918,10 @@ class LLVM_LIBRARY_VISIBILITY CygwinX86_64TargetInfo : public X86_64TargetInfo {
     if (Opts.CPlusPlus)
       Builder.defineMacro("_GNU_SOURCE");
   }
+
+  BuiltinVaListKind getBuiltinVaListKind() const override {
+    return TargetInfo::CharPtrBuiltinVaList;
+  }
 };
 
 class LLVM_LIBRARY_VISIBILITY DarwinX86_64TargetInfo

``````````

</details>


https://github.com/llvm/llvm-project/pull/76943