[Bug libfortran/108056] [12/13 Regression] backward compatibility issue between 11 and 12

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108056

--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tobias Burnus <burnus@gcc.gnu.org>:

https://gcc.gnu.org/g:e205ec03f0794aeac3e8a89e947c12624d5a274e

commit r13-4716-ge205ec03f0794aeac3e8a89e947c12624d5a274e
Author: Tobias Burnus <tobias@codesourcery.com>
Date:   Thu Dec 15 12:25:07 2022 +0100

    libgfortran's ISO_Fortran_binding.c: Use GCC11 version for backward-only
code [PR108056]

    Since GCC 12, the conversion between the array descriptors formats - the
    internal (GFC) and the C binding one (CFI) - moved to the compiler itself
    such that the cfi_desc_to_gfc_desc/gfc_desc_to_cfi_desc functions are only
    used with older code (GCC 9 to 11).  The newly added checks caused asserts
    as older code did not pass the proper values (e.g. real(4) as effective
    argument arrived as BT_ASSUME type as the effective type got lost
inbetween).

    As proposed in the PR, revert to the GCC 11 version - known bugs is better
    than some fixes and new issues. Still, GCC 12 is much better in terms of
    TS29113 support and should really be used.

    This patch uses the current libgomp version of the GCC 11 branch, except
    it fixes the GFC version number (which is 0), uses calloc instead of
malloc,
    and sets the lower bound to 1 instead of keeping it as is for
    CFI_attribute_other.

    libgfortran/ChangeLog:

            PR libfortran/108056
            * runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc,
            gfc_desc_to_cfi_desc): Mostly revert to GCC 11 version for
            those backward-compatiblity-only functions.