On Wednesday 09 November 2011 16:42:51 Graeme Russ wrote: > On Thu, Nov 10, 2011 at 4:12 AM, Mike Frysinger wrote: > > On Wednesday 09 November 2011 05:32:59 Graeme Russ wrote: > >> --- a/arch/x86/config.mk > >> +++ b/arch/x86/config.mk > >> > >> -PLATFORM_CPPFLAGS += -mregparm=3 > >> -PLATFORM_CPPFLAGS += -fomit-frame-pointer > > > > this sounds like you're throwing the baby out with the bath water. > > doesn't this severely affect the generated code ? > > No - omit-frame-pointer is enabled by -O2 and also: > > http://gcc.gnu.org/gcc-4.6/changes.html > > "The default setting (when not optimizing for size) for 32-bit > GNU/Linux and Darwin x86 targets has been changed to > -fomit-frame-pointer. The default can be reverted to > -fno-omit-frame-pointer by configuring GCC with the > --enable-frame-pointer configure option." > > So the flag is a do-nothing
ok, except: - we build u-boot with -Os and not -O2 - i'd say most people aren't using gcc-4.6 i was referring also to throwing away -mregparm=3 ... -mike
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