void mpi_group_excl_(int* group, int* n, int* ranks, int* newgroup, int* ierr);
void mpi_group_range_incl_(int* group, int* n, int ranges[][3], int* newgroup, int* ierr);
void mpi_group_range_excl_(int* group, int* n, int ranges[][3], int* newgroup, int* ierr);
void mpi_group_excl_(int* group, int* n, int* ranks, int* newgroup, int* ierr);
void mpi_group_range_incl_(int* group, int* n, int ranges[][3], int* newgroup, int* ierr);
void mpi_group_range_excl_(int* group, int* n, int ranges[][3], int* newgroup, int* ierr);