You would have been much better off nowadays, because the legacy vendor-specific features have mostly landed into gfortran (recently) behind flags. This is spec

You would have been much better off nowadays, because the legacy vendor-specific features have mostly landed into gfortran (recently) behind flags. This is specifically to aid porting off old compilers onto GCC/Clang. https://github.com/CodethinkLabs/fortrantools/blob/master/README.md https://github.com/CodethinkLabs/fortrantools/blob/master/RE... (And related repos...)