path: root/Makefile
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authorAndi Kleen <andi@firstfloor.org>2009-09-18 12:49:37 -0700
committerSam Ravnborg <sam@ravnborg.org>2009-09-20 12:27:44 +0200
commit8f7f5c9fc2966704579ff93f459ffa458bca6fc2 (patch)
tree63d6ecdac2e10828c45205f2c7d4a5e558c5767a /Makefile
parentc3c63b6bec3135e814fa07d30d57a253f41d53de (diff)
kbuild: set -fconserve-stack option for gcc 4.5
The upcomming gcc 4.5 has a new -fconserve-stack option that tells the inliner to take stack frame size in account. Set it if the compiler supports it. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'Makefile')
1 files changed, 3 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index a3b7770b2cd..5e1e74c9976 100644
--- a/Makefile
+++ b/Makefile
@@ -615,6 +615,9 @@ KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
# revert to pre-gcc-4.4 behaviour of .eh_frame
KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
+# conserve stack if available
+KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
# But warn user when we do so
warn-assign = \