Basically, Autotools is really stable software that has a ton of bugfixes in it.  You can&#x27;t just throw that knowledge away.  The overhead of unnecessary tests is negligible compared to compilation costs for anything but the most trivial project.  And, I&#x27;m pretty sure if you ask the mailing list, there&#x27;s a way to turn off unnecessary checks for a Fortran compiler, probably by specifying the languages to support with AC_LANG or something.<p>Yeah, it&#x27;s clunky and obtuse, but it works to give you portability to just about every system, POSIX or not.  And the free support is first class if you ever have a problem.