[Bug fortran/71839] undefined reference to `_gfortran_caf_stop_str'

[mexas at bristol dot ac.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71839

--- Comment #2 from Anton Shterenlikht <mexas at bristol dot ac.uk> ---
https://sourceforge.net/p/cgpack/code/HEAD/tree/head/tests/testAAF.f90

One would need to build the library first:

https://sourceforge.net/p/cgpack/code/HEAD/tree/head/

I'll try to reduce the problem case.