[libc-commits] [libc] 60d4a10 - [libc] Guard common macro names

[Alex Brachet via libc-commits]

Author: Alex Brachet
Date: 2022-06-14T15:05:16Z
New Revision: 60d4a10710693d9562fa2c01307d2acddbe104bb

URL: https://github.com/llvm/llvm-project/commit/60d4a10710693d9562fa2c01307d2acddbe104bb
DIFF: https://github.com/llvm/llvm-project/commit/60d4a10710693d9562fa2c01307d2acddbe104bb.diff

LOG: [libc] Guard common macro names

Differential revision: https://reviews.llvm.org/D127692

Added: 
    

Modified: 
    libc/src/__support/common.h

Removed: 
    


################################################################################
diff  --git a/libc/src/__support/common.h b/libc/src/__support/common.h
index 2660e7f682c5b..9e28be0ea5f75 100644
--- a/libc/src/__support/common.h
+++ b/libc/src/__support/common.h
@@ -11,9 +11,15 @@
 
 #define LIBC_INLINE_ASM __asm__ __volatile__
 
+#ifndef likely
 #define likely(x) __builtin_expect(!!(x), 1)
+#endif
+#ifndef unlikely
 #define unlikely(x) __builtin_expect(x, 0)
+#endif
+#ifndef UNUSED
 #define UNUSED __attribute__((unused))
+#endif
 
 #ifndef LLVM_LIBC_FUNCTION_ATTR
 #define LLVM_LIBC_FUNCTION_ATTR