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add comment why preferred stack boundary is 4 on i386
author
Denis Vlasenko
<vda.linux@googlemail.com>
Mon, 23 Jul 2007 21:05:06 +0000
(21:05 -0000)
committer
Denis Vlasenko
<vda.linux@googlemail.com>
Mon, 23 Jul 2007 21:05:06 +0000
(21:05 -0000)
arch/i386/Makefile
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diff --git
a/arch/i386/Makefile
b/arch/i386/Makefile
index
385dd52
..
e6c99c6
100644
(file)
--- a/
arch/i386/Makefile
+++ b/
arch/i386/Makefile
@@
-2,4
+2,6
@@
# Build system
# ==========================================================================
+# -mpreferred-stack-boundary=2 is essential in preventing gcc 4.2.x
+# from aligning stack to 16 bytes. (Which is gcc's way of supporting SSE).
CFLAGS += $(call cc-option,-march=i386 -mpreferred-stack-boundary=2,)