Hello! media-libs/t1lib doesn't compile on cross-compilation between two different arches, because the compiler is simply 'gcc', and not '${CHOST}-gcc'. To fix it, is only needed to export CC into the ebuild with tc-export. With the attached patch works to me well between i686, ppc and amd64.
Created attachment 85829 [details, diff] t1lib-5.0.2.ebuild.patch
Fixed in CVS, thanks!