In the past with 3.3 and 3.4 gcc could be build as a 64 bit binary on ppc64. gentoo-ppc64 as a distro is a full 64 bit environment.
I've been doing some early explorations on gcc 4.x for our next release of gentoo-ppc64 and found that gcc no longer is able to bootstrap or even build in a pure 64 bit environment.
As a request could we get this functionality back?
As an added bonus I would appreciate if we could bootstrap a bi-arch (aka multilib) 32/64 compiler from a pure 64 bit environment as well. This is also not possible today.
For a pure 64bit PPC GNU/Linux, you need --disable-multilib (and maybe --with-cpu=default64) as you don't have a 32bit glibc.
Unless I am misunderstanding what you mean by a pure 64bit PPC GNU/Linux distro.
--with-cpu=default64 will do what you think it does and builds a 64 bit compiler that is a 64bits binary.
I'll give that whirl... I think I was mistakenly using --disable-biarch! :-/
fresh subversion code + right param seems to fix it ... least for the pure 64 bit case. I'll get to the multilib from 64 bit case in a few days.