Fix Autotools build error due to missing m4 and MPICC/MPICXX (#5319)
Fix Autotools build error due to missing m4 and MPICC/MPICXX (#5319)


EmreAtes/spack,LLNL/spack,lgarren/spack,matthiasdiener/spack,skosukhin/spack,tmerrick1/spack,LLNL/spack,iulian787/spack,skosukhin/spack,mfherbst/spack,TheTimmy/spack,TheTimmy/spack,LLNL/spack,lgarren/spack,lgarren/spack,iulian787/spack,krafczyk/spack,skosukhin/spack,matthiasdiener/spack,TheTimmy/spack,EmreAtes/spack,matthiasdiener/spack,iulian787/spack,skosukhin/spack,mfherbst/spack,krafczyk/spack,EmreAtes/spack,krafczyk/spack,TheTimmy/spack,EmreAtes/spack,matthiasdiener/spack,krafczyk/spack,mfherbst/spack,LLNL/spack,tmerrick1/spack,skosukhin/spack,tmerrick1/spack,mfherbst/spack,krafczyk/spack,LLNL/spack,lgarren/spack,EmreAtes/spack,lgarren/spack,tmerrick1/spack,TheTimmy/spack,tmerrick1/spack,mfherbst/spack,iulian787/spack,matthiasdiener/spack,iulian787/spack