Re: Building with -msse
Russ Allbery <firstname.lastname@example.org> writes:
> Faidon Liambotis <email@example.com> writes:
>> Russ Allbery wrote:
>>> However, a user mentioned that he thinks all chips that fall into the
>>> amd64 architecture have SSE and hence adding -msse would be safe for the
>>> amd64 build. Is that correct? And in general are there any guidelines
>>> about things like this? I assume that using -msse for the i386 build is
>>> still out since we still support 486 chips.
>> AFAIK, the amd64 gcc enables those extension by default.
> Yeah, that was one of the things that was confusing me. It looks like
> gnubg also has some custom code that's enabled based on a configure
> argument as well.
You should talk to upstream and have it default to on for amd64.
And check if there is any sse3 support. That one needs cpu suport on
> Also, it looks like it probes at runtime for SSE, so I may be able to
> build with that on i386 as well.