Messages in this thread | | | Date | Tue, 31 May 2011 17:30:26 +0100 | From | Catalin Marinas <> | Subject | Re: [PATCH] Disable -fconserve-stack on ARM |
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On Sat, May 28, 2011 at 04:34:17PM +0100, Andi Kleen wrote: > Disable -fconserve-stack on ARM > > There are reports that -fconserve-stack misaligns variables on the stack. > Disable it for ARM to work around this gcc bug. > > Signed-off-by: Andi Kleen <ak@linux.intel.com> > > diff --git a/arch/arm/Makefile b/arch/arm/Makefile > index 25750bc..0883cff 100644 > --- a/arch/arm/Makefile > +++ b/arch/arm/Makefile > @@ -41,6 +41,10 @@ ifeq ($(CONFIG_CC_STACKPROTECTOR),y) > KBUILD_CFLAGS +=-fstack-protector > endif > > +# ARM gcc developers unfortunately broke -fconserve-stack. It misaligns > +# variables on the stack > +KBUILD_CFLAGS += $(call cc-option,-fno-conserve-stack)
Didn't work, on the gcc command line we get -fno-conserve-stack followed by -fconserve-stack from the top makefile and it seems that the latter takes priority.
-- Catalin
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