include/stddef.h: define NULL only if undefined

2015-10-25 00:19:12 +03:00 · 2015-10-25 00:19:12 +03:00 · 12f94f2770
parent f3ce1be333
commit 12f94f2770
1 changed files with 3 additions and 0 deletions
--- a/include/stddef.h
+++ b/include/stddef.h
@ -20,7 +20,10 @@ typedef unsigned int uint32_t;
 typedef unsigned long long int uint64_t;
 #endif

+#ifndef NULL
 #define NULL ((void*)0)
+#endif
+
 #define offsetof(type, field) ((size_t)&((type *)0)->field)

 void *alloca(size_t size);