see http://www.mail-archive.com/devel@lists.laptop.org/msg10626.html
--- a/arch/i386/Makefile 2008-09-09 12:15:51.000000000 +0200
+++ b/arch/i386/Makefile 2008-09-09 12:16:26.000000000 +0200
-@@ -34,7 +34,11 @@ CHECKFLAGS += -D__i386__
+@@ -34,7 +34,9 @@ CHECKFLAGS += -D__i386__
CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return
# prevent gcc from keeping the stack 16 byte aligned
-CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
-+#CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
+CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2,)
-+
+CFLAGS += $(call cc-option,-fno-tree-scev-cprop,)
+