Only define NULL when not defined yet

1991-10-15 09:25:44 +00:00 · 1991-10-15 09:25:44 +00:00 · 77fd6f2b37
commit 77fd6f2b37
parent cbe82179fb
1 changed files with 2 additions and 0 deletions
--- a/lib/minix/include/string.h
+++ b/lib/minix/include/string.h
@ -5,7 +5,9 @@
 #ifndef _STRING_H
 #define _STRING_H

+#ifndef NULL
 #define NULL    ((void *)0)
+#endif

 #ifndef _SIZE_T
 #define _SIZE_T