[llvm] use __attribute__ for export visibility macros

Author: andrurogerz

llvm/include/llvm/Support/Compiler.h

@@ -199,15 +199,15 @@
 #define LLVM_ABI_EXPORT __declspec(dllexport)
 #elif defined(__ELF__) || defined(__MINGW32__) || defined(_AIX) ||             \
     defined(__MVS__)
-#define LLVM_ABI LLVM_ATTRIBUTE_VISIBILITY_DEFAULT
-#define LLVM_TEMPLATE_ABI LLVM_ATTRIBUTE_VISIBILITY_DEFAULT
+#define LLVM_ABI __attribute__((visibility("default")))
+#define LLVM_TEMPLATE_ABI __attribute__((visibility("default")))
 #define LLVM_EXPORT_TEMPLATE
-#define LLVM_ABI_EXPORT LLVM_ATTRIBUTE_VISIBILITY_DEFAULT
+#define LLVM_ABI_EXPORT __attribute__((visibility("default")))
 #elif defined(__MACH__) || defined(__WASM__) || defined(__EMSCRIPTEN__)
-#define LLVM_ABI LLVM_ATTRIBUTE_VISIBILITY_DEFAULT
+#define LLVM_ABI __attribute__((visibility("default")))
 #define LLVM_TEMPLATE_ABI
 #define LLVM_EXPORT_TEMPLATE
-#define LLVM_ABI_EXPORT LLVM_ATTRIBUTE_VISIBILITY_DEFAULT
+#define LLVM_ABI_EXPORT __attribute__((visibility("default")))
 #endif
 #else
 #define LLVM_ABI