--- gcc-4.7.2/libitm/configure	2012-09-20 10:23:55.000000000 +0300
+++ gcc-4.7.2-avx/libitm/configure	2013-02-24 01:24:07.572471010 +0300
@@ -775,6 +775,7 @@
 enable_linux_futex
 enable_tls
 enable_symvers
+enable_avx
 '
       ac_precious_vars='build_alias
 host_alias
@@ -17309,7 +17310,8 @@
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libitm_cv_as_avx" >&5
 $as_echo "$libitm_cv_as_avx" >&6; }
-  if test x$libitm_cv_as_avx = xyes; then
+  if test "${enable_avx+set}" = set; then
+  #if test x$libitm_cv_as_avx = xyes; then
 
 $as_echo "#define HAVE_AS_AVX 1" >>confdefs.h