[Bug fortran/124690] gfortran preprocessor recurses where the C standard precludes recursion

[damian at archaeologic dot codes]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124690

--- Comment #6 from Damian Rouson <damian at archaeologic dot codes> ---
Is there a flag that switches from the default traditional macro expansion  to
standard expansion?  Specifically, is there a flag that enables compiling the
code submitted in this issue?