Open MPI keeps references to GCC, GFortran, etc.

[Ludovic Courtès]

Hello,

Open MPI retains references to GCC, GFortran, etc., which significantly
increases its closure size.

The references come from cpp macros such as OMPI_FC_ABSOLUTE (absolute
file name of the Fortran compiler), defined in opal_config.h and
returned by command-line tools ‘ompi_info’ and ‘oshmem_info’.

What would be the impact of changing these OMPI_*_ABSOLUTE uses to just
the basename of the compiler?  Are there tools or practices that rely on
the info provided by these two commands?

Thanks,
Ludo’.