Fix m4 to compile with Intel (#5728)
Fix m4 to compile with Intel (#5728)

Fixes #5705.
iulian787/spack,matthiasdiener/spack,skosukhin/spack,tmerrick1/spack,mfherbst/spack,skosukhin/spack,krafczyk/spack,mfherbst/spack,tmerrick1/spack,skosukhin/spack,mfherbst/spack,krafczyk/spack,lgarren/spack,EmreAtes/spack,skosukhin/spack,krafczyk/spack,EmreAtes/spack,LLNL/spack,matthiasdiener/spack,lgarren/spack,lgarren/spack,EmreAtes/spack,EmreAtes/spack,mfherbst/spack,tmerrick1/spack,lgarren/spack,matthiasdiener/spack,LLNL/spack,tmerrick1/spack,LLNL/spack,LLNL/spack,iulian787/spack,lgarren/spack,skosukhin/spack,iulian787/spack,mfherbst/spack,tmerrick1/spack,EmreAtes/spack,krafczyk/spack,matthiasdiener/spack,LLNL/spack,krafczyk/spack,iulian787/spack,iulian787/spack,matthiasdiener/spack