llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: None (kkent030315)

<details>
<summary>Changes</summary>

Fixes #<!-- -->152083 - duplicate symbols in `c-index-test`

- Eliminated the use of `CLANG_EXPORTS` for Clang component libraries.
- Removed unnecessary dllimport attributes from `Compiler.h`. They aren't 
strictly required (the linker will resolve them).

---
Full diff: https://github.com/llvm/llvm-project/pull/171054.diff


2 Files Affected:

- (modified) clang/cmake/modules/AddClang.cmake (-3) 
- (modified) clang/include/clang/Support/Compiler.h (+2-2) 


``````````diff
diff --git a/clang/cmake/modules/AddClang.cmake 
b/clang/cmake/modules/AddClang.cmake
index 4059fc3e986c7..9dcc77d5a5184 100644
--- a/clang/cmake/modules/AddClang.cmake
+++ b/clang/cmake/modules/AddClang.cmake
@@ -115,9 +115,6 @@ macro(add_clang_library name)
     if(TARGET "obj.${name}")
       target_compile_definitions("obj.${name}" PUBLIC CLANG_BUILD_STATIC)
     endif()
-  elseif(TARGET "obj.${name}" AND NOT ARG_SHARED AND NOT ARG_STATIC)
-    # Clang component libraries linked to clang-cpp are declared without 
SHARED or STATIC
-    target_compile_definitions("obj.${name}" PUBLIC CLANG_EXPORTS)
   endif()
 
   set(libs ${name})
diff --git a/clang/include/clang/Support/Compiler.h 
b/clang/include/clang/Support/Compiler.h
index e1ae3eda4ccc2..1aab64e11521c 100644
--- a/clang/include/clang/Support/Compiler.h
+++ b/clang/include/clang/Support/Compiler.h
@@ -45,8 +45,8 @@
 #define CLANG_TEMPLATE_ABI
 #define CLANG_EXPORT_TEMPLATE __declspec(dllexport)
 #else
-#define CLANG_ABI __declspec(dllimport)
-#define CLANG_TEMPLATE_ABI __declspec(dllimport)
+#define CLANG_ABI
+#define CLANG_TEMPLATE_ABI
 #define CLANG_EXPORT_TEMPLATE
 #endif
 #elif defined(__ELF__) || defined(__MINGW32__) || defined(_AIX) ||             
\

``````````

</details>


https://github.com/llvm/llvm-project/pull/171054
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