http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53266
--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> 2012-09-25 11:44:42 UTC --- > I haven't built GCC on the AIX 4.3 (PowerPC 604) system lately, but my scripts > are set up to do so using > > --with-cpu=powerpc --disable-aix64 --disable-powercpu > > in order to avoid this issue. Should I be able to drop any of these, at this > point? You can remove the --with-cpu; the default on AIX4.3 is 604e, which should work fine. I don't think you can yet remove the --disable-powercpu since I didn't touch the multilib code (I completely missed it, and wow it's a nice little maze all of itself). I have no idea about --disable-aix64. Try and see :-)