XBT_PUBLIC(void) coll_help(const char *category,
s_mpi_coll_description_t * table);
XBT_PUBLIC(int) find_coll_description(s_mpi_coll_description_t * table,
XBT_PUBLIC(void) coll_help(const char *category,
s_mpi_coll_description_t * table);
XBT_PUBLIC(int) find_coll_description(s_mpi_coll_description_t * table,