vapier at gentoo.org
Sat Jan 9 00:38:53 CET 2010
i was reviewing Gentoo gmp patches again after the new release and figured
it's high time to get s390x stuff integrated upstream. searching the mailing
list resulted in these old threads:
while i can understand wanting the best performance out of the box, i dont
think that optimizations should be used to prevent even basic support for a
target. which is to say, can we at least get the configure check merged ?
every distro that supports s390x is carrying some variant of that patch
as for the multilib question, yes s390x can do s390 multilib. you simply need
to add -m31 when compiling/linking. some people call s390 a "31bit" arch
because it is limited to 31bits for addressing, but that can be ignored for
the purposes of gmp i think.
s390 gcc targets define __s390__ while s390x gcc targets define __s390__ and
__s390x__. i'm pretty sure the i370/mvs defines are non-gcc compiler defines.
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