void mpi_ssend_(void* buf, int* count, int* datatype, int* dest, int* tag, int* comm, int* ierr);
void mpi_ssend_init_(void* buf, int* count, int* datatype, int* dest, int* tag, int* comm, int* request, int* ierr);
void mpi_intercomm_create_(int* local_comm, int* local_leader, int* peer_comm, int* remote_leader, int* tag,
void mpi_ssend_(void* buf, int* count, int* datatype, int* dest, int* tag, int* comm, int* ierr);
void mpi_ssend_init_(void* buf, int* count, int* datatype, int* dest, int* tag, int* comm, int* request, int* ierr);
void mpi_intercomm_create_(int* local_comm, int* local_leader, int* peer_comm, int* remote_leader, int* tag,