This specific assembly file in libgcc; config/i386/avx_savms64.S, is causing build failures in m32 mode on amd64 (AKA i386)
Please always include the full logs. Anyway, looks like a dupe of bug 933772. *** This bug has been marked as a duplicate of bug 933772 ***
Created attachment 896317 [details] emerge --info
Created attachment 896318 [details] Build log
Oh yeah, this bug **is** a dupe of bug 933772! Thanks for telling me.