compilation failed due to argument unused during compilation: '-ffixed-line-length-132' (-ffixed-line-length-132 vs. -Mextend)

[flang-compiler]

compilation failed due to argument unused during compilation: '-ffixed-line-length-132' (-ffixed-line-length-132 vs. -Mextend)

[janusw]

This is the more general issue on how much Flang should be able to act as a drop-in replacement for gfortran and therefore accept its command-line syntax.

In that context I would argue that it is much less important for flang to replicate gfortran's command-line syntax than it is to replicate gfortran's feature set.

Talking about line length: It seems that flang is still missing an option that is equivalent to gfortran's -ffree-line-length-none (see https://gcc.gnu.org/onlinedocs/gfortran/Fortran-Dialect-Options.html), allowing arbitrary-length lines.

Regarding identical syntax: Any Fortran project that supports more than just one compiler has to define compiler-specific flags anyway, which is really not hard to do (using proper build tools like cmake). The options of gfortran/ifort/pgi/sun differ an awful lot.

Cheers,
Janus