2007-05-10  Ulrich Drepper  <drepper@redhat.com>

	* include/sys/cdefs.h: Redefine __nonnull so that test for
	incorrect parameters in the libc code itself are not omitted.

--- libc/include/sys/cdefs.h	18 Oct 2004 04:17:15 -0000	1.2
+++ libc/include/sys/cdefs.h	10 May 2007 20:15:11 -0000	1.3
@@ -2,6 +2,12 @@
 
 #include <misc/sys/cdefs.h>
 
+/* The compiler will optimize based on the knowledge the parameter is
+   not NULL.  This will omit tests.  A robust implementation cannot allow
+   this so when compiling glibc itself we ignore this attribute.  */
+#undef __nonnull
+#define __nonnull(params)
+
 extern void __chk_fail (void) __attribute__ ((__noreturn__));
 libc_hidden_proto (__chk_fail)
 rtld_hidden_proto (__chk_fail)