mpich Wizards, Trying our first build of mpich-3.0.4, and seeing Assembler messages at build time: (there are clearly a lot of config options to become familiar with; but, as a first pass): Configure is: ./configure --prefix=/usr/local/mpi32 \ CFLAGFS="-m32" FFLAGS="-m32" \ | tee c.txt $ make ... CC src/mpi/attr/attrutil.lo CC src/mpi/attr/dup_fn.lo CC src/mpi/coll/allred_group.lo CC src/mpi/coll/barrier_group.lo CC src/mpi/coll/helper_fns.lo /var/tmp//ccf4aaqC.s: Assembler messages: /var/tmp//ccf4aaqC.s:851: Error: number of operands mismatch for `mov' /var/tmp//ccf4aaqC.s:859: Error: number of operands mismatch for `mov' make[2]: *** [src/mpi/coll/helper_fns.lo] Error 1 make[2]: Leaving directory `<build_path>/mpich-3.0.4' make[1]: *** [all-recursive] Error 1 gcc 4.7.3 Platform is i86 OpenIndiana (Illumos, Solaris-ish) Can anyone point me in the right direction? Lou