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Re: Using __sync_* builtins within libgcc code
On Tue, Jun 10, 2008 at 7:42 AM, Joseph S. Myers
<joseph@codesourcery.com> wrote:
> On Tue, 10 Jun 2008, H.J. Lu wrote:
>
>> On Tue, Jun 10, 2008 at 02:27:17PM +0200, Paolo Carlini wrote:
>> > Joseph S. Myers wrote:
>> >> I hold that it is a bug that i686-* tools default to -march=i386 instead
>> >> of -march=i686 (whereas e.g. sparcv9-* tools default to -mcpu=sparcv9, and
>> >> -mcpu means -march for SPARC).
>> > Seconded.
>> >
>>
>> What arch should be used for -m32 on x86-64? Personally, I think
>> it should be at least i686, if not SSE2.
>
> -march=x86-64, I'd say, if you're configuring as x86_64-* (so assuming
> those 32-bit features present on all 64-bit processors). Obviously,
> subject to override from --with-arch-32 or --with-arch.
>
Works for me.
Thanks.
--
H.J.