--- gcc/configure.orig	2014-12-08 11:29:43 UTC
+++ gcc/configure
@@ -6408,7 +6408,7 @@ fi
 
 loose_warn=
 save_CFLAGS="$CFLAGS"
-for real_option in -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual; do
+for real_option in -W -Wall -Wno-increment-bool -Wno-narrowing -Wno-register -Wwrite-strings -Wcast-qual; do
   # Do the check with the no- prefix removed since gcc silently
   # accepts any -Wno-* option on purpose
   case $real_option in