[llvm] [LLVM]Fix symbol visibility macros not being define for AIX (PR #107705)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-support

Author: Thomas Fransham (fsfod)

<details>
<summary>Changes</summary>

This is to try and fix buildbot failure on [clang-ppc64-aix](https://lab.llvm.org/buildbot/#/builders/64/builds/881) from my changes in #<!-- -->96630.  I don't really know much about AIX so it would be good to have someone more knowledgeable to say if visibility macros on extern templates is needed on AIX similar to ELF.  @<!-- -->compnerd @<!-- -->tstellar 

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Full diff: https://github.com/llvm/llvm-project/pull/107705.diff


1 Files Affected:

- (modified) llvm/include/llvm/Support/Compiler.h (+1-1) 


``````````diff
diff --git a/llvm/include/llvm/Support/Compiler.h b/llvm/include/llvm/Support/Compiler.h
index 140ff611af79fb..1d2d751d4dc11a 100644
--- a/llvm/include/llvm/Support/Compiler.h
+++ b/llvm/include/llvm/Support/Compiler.h
@@ -189,7 +189,7 @@
 #define LLVM_TEMPLATE_ABI __declspec(dllimport)
 #define LLVM_EXPORT_TEMPLATE
 #endif
-#elif defined(__ELF__) || defined(__MINGW32__)
+#elif defined(__ELF__) || defined(__MINGW32__) || defined(_AIX)
 #define LLVM_ABI LLVM_ATTRIBUTE_VISIBILITY_DEFAULT
 #define LLVM_TEMPLATE_ABI LLVM_ATTRIBUTE_VISIBILITY_DEFAULT
 #define LLVM_EXPORT_TEMPLATE

``````````

</details>


https://github.com/llvm/llvm-project/pull/107705