--- binutils-2.9.1/libiberty/argv.c	1998-05-01 17:47:48.000000000 +0200
+++ binutils-2.9.1/libiberty/argv.c	2012-08-04 12:43:35.000000000 +0200
@@ -35,12 +35,13 @@
 #ifdef __STDC__
 
 #include <stddef.h>
+#ifndef __APPLE__
 extern void *memcpy (void *s1, const void *s2, size_t n);	/* 4.11.2.1 */
 extern size_t strlen (const char *s);				/* 4.11.6.3 */
 extern void *malloc (size_t size);				/* 4.10.3.3 */
 extern void *realloc (void *ptr, size_t size);			/* 4.10.3.4 */
 extern void free (void *ptr);					/* 4.10.3.2 */
-extern char *strdup (const char *s);				/* Non-ANSI */
+#endif
 
 #else	/* !__STDC__ */