Function mpi_sys::PMPI_Allgatherv

pub unsafe extern "C" fn PMPI_Allgatherv(
    sendbuf: *const c_void, 
    sendcount: c_int, 
    sendtype: MPI_Datatype, 
    recvbuf: *mut c_void, 
    recvcounts: *const c_int, 
    displs: *const c_int, 
    recvtype: MPI_Datatype, 
    comm: MPI_Comm
) -> c_int