Not sure what the op has in mind precisely, but Makefiles for modern Fortran with modules is annoying. Do a search for "makefile fortran modules" or similar an

Not sure what the op has in mind precisely, but Makefiles for modern Fortran with modules is annoying. Do a search for "makefile fortran modules" or similar and you'll find a bunch of articles, including https://stackoverflow.com/questions/35234003/how-to-create-a-makefile-for-a-fortran-program-using-modules https://stackoverflow.com/questions/35234003/how-to-create-a... I tried helping a friend with some Fortran but eventually gave up due to this issue and GNU Fortran's insistence on using the standard % instead of "." for structure syntax.