Hi, After compiling 3.0.3 from source using gcc 4.7: ./configure --prefix=/panfs/scratch/vol1/certik/h/bld/mpich/webn36mjzfb3 --enable-shared (Full log is here: https://gist.github.com/certik/9041130) It fails with: [mpich] CC src/mpi/topo/nhb_allgather.lo [mpich] CC src/mpi/topo/nhb_allgatherv.lo [mpich] CC src/mpi/topo/nhb_alltoall.lo [mpich] CC src/mpi/topo/nhb_alltoallv.lo [mpich] CC src/mpi/topo/nhb_alltoallw.lo [mpich] CC src/binding/f90/create_f90_int.lo [mpich] CC src/binding/f90/create_f90_real.lo [mpich] src/binding/f90/create_f90_real.c: In function 'PMPI_Type_create_f90_real': [mpich] src/binding/f90/create_f90_real.c:73:23: error: expected expression before ',' token [mpich] src/binding/f90/create_f90_real.c:74:25: error: expected expression before ',' token [mpich] make[2]: *** [src/binding/f90/create_f90_real.lo] Error 1 [mpich] make[2]: Leaving directory `/panfs/scratch/vol1/certik/h/tmp/mpich-webn36mjzfb3-1' [mpich] make[1]: *** [all-recursive] Error 1 [mpich] make[1]: Leaving directory `/panfs/scratch/vol1/certik/h/tmp/mpich-webn36mjzfb3-1' [mpich] make: *** [all] Error 2 It compiles fine with gcc 4.4. Ondrej