sys-libs/libstdc++-v3 fails to compile using distcc+cross compile, because the configure script does not set CC correctly (default to "gcc", instead of ${CHOST}-gcc}. I propose a little working patch, but feel free to resolve the issue in a more elegant way ;-)
Created attachment 139909 [details, diff] libstdc++-v3-3.3.6.ebuild.diff
that change is no good ... the ebuild should be converted to use econf and things should work magically after that
should be fixed now ... the ebuild has been rewritten