On 25 November 2013 19:13, dellair jie wrote: > Folks, > > I am compiling GCC 4.4.5 on AIX 6.1 with xlc 10.1. > > GMP, MPFR, MPC are compiled because we have no root control over the server. Then you should probably build then in-tree, not install them separately. See http://gcc.gnu.org/wiki/InstallingGCC > configure:2627: error: in `/gcc/powerpc-ibm-aix6.1.0.0/ppc64/libgcc': > configure:2629: error: cannot compute suffix of object files: cannot compile > See `config.log' for more details. Have you read http://gcc.gnu.org/wiki/FAQ#configure_suffix ? If you follow the instructions at http://gcc.gnu.org/wiki/InstallingGCC it will probably solve your problem.