mpich/3.2.1			stable		gcc/5.5.0
mpich/3.2.1			stable		gcc/6.4.0
mpich/3.2.1			stable		gcc/7.3.0
mpich/3.2.1_merlin		unstable	gcc/7.3.0 b:binutils/2.29 b:mxm/3.6.3104
mpich/3.2.1			stable		intel/17.4