llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang

@llvm/pr-subscribers-clang-driver

Author: hw-1 (hw-1)

<details>
<summary>Changes</summary>

fix error: .gch' was ignored because it is not a clang PCH file   
https://github.com/llvm/llvm-project/issues/76923

---
Full diff: https://github.com/llvm/llvm-project/pull/77882.diff


1 Files Affected:

- (modified) clang/lib/Driver/ToolChains/Clang.cpp (+1-1) 


``````````diff
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp 
b/clang/lib/Driver/ToolChains/Clang.cpp
index 1ee7ae602f3ce5..2c35b9b84ac959 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -951,7 +951,7 @@ static void handleAMDGPUCodeObjectVersionOptions(const 
Driver &D,
 static bool hasClangPchSignature(const Driver &D, StringRef Path) {
   if (llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> MemBuf =
           D.getVFS().getBufferForFile(Path))
-    return (*MemBuf)->getBuffer().starts_with("CPCH");
+    return (*MemBuf)->getBuffer().contains("CPCH");
   return false;
 }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/77882
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