[llvm] [llvm] annotate interfaces in llvm/Support for DLL export (PR #136014)

[Andrew Rogers via llvm-commits]

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@@ -16,34 +16,41 @@
 #define LLVM_SUPPORT_TARGETSELECT_H
 
 #include "llvm/Config/llvm-config.h"
+#include "llvm/Support/Compiler.h"
 
 extern "C" {
   // Declare all of the target-initialization functions that are available.
-#define LLVM_TARGET(TargetName) void LLVMInitialize##TargetName##TargetInfo();
+#define LLVM_TARGET(TargetName)                                                \
+  LLVM_ABI void LLVMInitialize##TargetName##TargetInfo();
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andrurogerz wrote:

I don't see any value in keeping `LLVM_C_ABI` around. More annotation variations will just lead to confusion. It is currently defined as `LLVM_ABI`. I can put up a change to remove it.

https://github.com/llvm/llvm-project/pull/136014