diff -Nrup a/misc/sys/cdefs.h b/misc/sys/cdefs.h
--- a/misc/sys/cdefs.h	2012-06-05 07:42:49.000000000 -0600
+++ b/misc/sys/cdefs.h	2012-06-07 12:15:21.808318708 -0600
@@ -142,7 +142,10 @@
 #define __bos0(ptr) __builtin_object_size (ptr, 0)
 #define __fortify_function __extern_always_inline __attribute_artificial__
 
-#if __GNUC_PREREQ (4,3)
+#if __GNUC_PREREQ (4,3) \
+    || (defined __GNUC_RH_RELEASE__ && __GNUC__ == 4 \
+	&& __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 2 \
+	&& __GNUC_RH_RELEASE__ >= 31)
 # define __warndecl(name, msg) \
   extern void name (void) __attribute__((__warning__ (msg)))
 # define __warnattr(msg) __attribute__((__warning__ (msg)))
@@ -320,7 +323,10 @@
 
 /* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
    inline semantics, unless -fgnu89-inline is used.  */
-#if !defined __cplusplus || __GNUC_PREREQ (4,3)
+#if !defined __cplusplus || __GNUC_PREREQ (4,3) \
+    || (defined __GNUC_RH_RELEASE__ && __GNUC__ == 4 \
+       && __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 2 \
+       && __GNUC_RH_RELEASE__ >= 31)
 # if defined __GNUC_STDC_INLINE__ || defined __cplusplus
 #  define __extern_inline extern __inline __attribute__ ((__gnu_inline__))
 #  define __extern_always_inline \
@@ -333,7 +339,10 @@
 
 /* GCC 4.3 and above allow passing all anonymous arguments of an
    __extern_always_inline function to some other vararg function.  */
-#if __GNUC_PREREQ (4,3)
+#if __GNUC_PREREQ (4,3) \
+    || (defined __GNUC_RH_RELEASE__ && __GNUC__ == 4 \
+	&& __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 2 \
+	&& __GNUC_RH_RELEASE__ >= 31)
 # define __va_arg_pack() __builtin_va_arg_pack ()
 # define __va_arg_pack_len() __builtin_va_arg_pack_len ()
 #endif