File tls-no-direct.diff of Package gcc47

Index: gcc/config/i386/gnu-user.h
===================================================================
--- gcc/config/i386/gnu-user.h.orig	2011-05-09 17:58:22.000000000 +0200
+++ gcc/config/i386/gnu-user.h	2011-11-03 17:12:38.000000000 +0100
@@ -30,8 +30,12 @@ along with GCC; see the file COPYING3.
 #define DEFAULT_PCC_STRUCT_RETURN 1
 
 /* We arrange for the whole %gs segment to map the tls area.  */
+/* This slows down Xen, so take a very small general performance hit
+   for not accessing the %gs segment with negative offsets by making
+   GCC not emit direct accesses to %gs at all.
 #undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
 #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS
+ */
 
 #undef ASM_COMMENT_START
 #define ASM_COMMENT_START "#"