--- include/libiberty.h.orig	2007-02-09 15:29:21.000000000 +0000
+++ include/libiberty.h	2008-07-25 21:17:25.000000000 +0000
@@ -554,8 +554,11 @@
 /* Like sprintf but provides a pointer to malloc'd storage, which must
    be freed by the caller.  */
 
+/* asprintf may be declared as a macro by glibc with __USE_FORTIFY_LEVEL.  */
+#ifndef asprintf
 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
 #endif
+#endif
 
 #if !HAVE_DECL_VASPRINTF
 /* Like vsprintf but provides a pointer to malloc'd storage, which