[libc-commits] [libc] 1c602c5 - [libc] Define away __restrict in C++ without GNU extensions (#114655)

[via libc-commits]

Author: Roland McGrath
Date: 2024-11-04T11:23:27-08:00
New Revision: 1c602c5fe5d0a22e9accc08fda4ea50f49938476

URL: https://github.com/llvm/llvm-project/commit/1c602c5fe5d0a22e9accc08fda4ea50f49938476
DIFF: https://github.com/llvm/llvm-project/commit/1c602c5fe5d0a22e9accc08fda4ea50f49938476.diff

LOG: [libc] Define away __restrict in C++ without GNU extensions (#114655)

The C99 restrict keyword is spelled __restrict in the libc
headers so it can be parsed by C++ compilers with GNU extensions
that recognize it.  When GNU extensions are not available in C++

Added: 
    

Modified: 
    libc/include/__llvm-libc-common.h

Removed: 
    


################################################################################
diff  --git a/libc/include/__llvm-libc-common.h b/libc/include/__llvm-libc-common.h
index 3af0b08e9e8668..e0e29bbbd5f87c 100644
--- a/libc/include/__llvm-libc-common.h
+++ b/libc/include/__llvm-libc-common.h
@@ -17,6 +17,12 @@
 #undef __END_C_DECLS
 #define __END_C_DECLS }
 
+// Standard C++ doesn't have C99 restrict but GNU C++ has it with __ spelling.
+#undef __restrict
+#ifndef __GNUC__
+#define __restrict
+#endif
+
 #undef _Noreturn
 #define _Noreturn [[noreturn]]