On Wed, Jun 17, 2009 at 12:16:30AM +0400, Anton Vorontsov wrote: > According to Segher Boessenkool and GCC manual, -fomit-frame-pointer > is only the default when optimising on archs/ABIs where it doesn't > hinder debugging and -pg. So, we do not get it by default on x86, > not at any optimisation level. > > On the other hand, *using* -fno-omit-frame-pointer causes gcc to > produce buggy code on PowerPC targets. > > If Segher and GCC manual are right, this patch should be a no-op > for all arches except PowerPC, where the patch fixes gcc issues. > > Signed-off-by: Anton Vorontsov <avoront...@ru.mvista.com> > --- > > See this thread for more discussion: > http://osdir.com/ml/linux-kernel/2009-05/msg01754.html > > p.s. > Obviously, I didn't test this patch on anything else but PPC32. ;-) > > Segher, do you know if all GCC versions that we support for > building Linux are behaving the way that GCC manual describe?
No news is good news... Ingo, can we merge this into -tip for testing? Thanks, > Makefile | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/Makefile b/Makefile > index ea63667..70ad1ff 100644 > --- a/Makefile > +++ b/Makefile > @@ -535,7 +535,7 @@ KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) > endif > > ifdef CONFIG_FRAME_POINTER > -KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls > +KBUILD_CFLAGS += -fno-optimize-sibling-calls > else > KBUILD_CFLAGS += -fomit-frame-pointer > endif > -- > 1.6.3.1 > > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@lists.ozlabs.org > https://lists.ozlabs.org/listinfo/linuxppc-dev -- Anton Vorontsov email: cbouatmai...@gmail.com irc://irc.freenode.net/bd2 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
