I'd like to drop some of the older 4.4 versions, so please stabilize sys-devel/gcc-4.4.6-r1. You will almost certainly run into runtime issues with packages linked against libstdc++ due to symbol versioning (see bug #297685). The error will look something like /usr/lib/gcc/x86_64-pc-linux-gnu/4.4.6/libstdc++.so.6: version `GLIBCXX_3.4.15' not found. You'll need to rebuild these packages with 4.4. The dependency chains between packages can sometimes be difficult to figure out so expect that it may take some effort.
>>> Jobs: 13 of 13 complete >>> Installing (2 of 17) sys-apps/which-2.20 >>> Jobs: 17 of 17 complete. Managed fine with gcc-4.4.6-r1. Not certain how to check for cited issue.
amd64 ok, rebuilded @system without problems @Ian: for example with eix before recompiling it
x86 very good ( emerge @system )
amd64: archtester / # emerge @system -pv Total: 45 packages (4 new, 41 reinstalls), Size of downloads: 8,649 kB Yep, emerged system fine
amd64 stable
ppc done
ppc64 done
x86 stable, thanks Zlogene
arm stable
alpha/ia64/s390/sh/sparc stable