[Bug fortran/125902] -fc-prototypes incorrect for allocatable arrays and allocatable and assumed length character strings

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125902

--- Comment #15 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Harald Anlauf <anlauf@gcc.gnu.org>:

https://gcc.gnu.org/g:fdffb66e398d4440116a7d7834aae11053973ffe

commit r17-1924-gfdffb66e398d4440116a7d7834aae11053973ffe
Author: Harald Anlauf <anlauf@gmx.de>
Date:   Thu Jun 25 22:55:47 2026 +0200

    Fortran: -fc-prototypes, deferred shape and deferred length dummies
[PR125902]

    Commit r17-1785 fixed the C prototypes emitted by -fc-prototypes for
    procedure interfaces with deferred shape and deferred length dummies, but
    did not consistently detect when "#include <ISO_Fortran_binding.h>" was
    needed.  Use common helper function to handle this.

            PR fortran/125902

    gcc/fortran/ChangeLog:

            * dump-parse-tree.cc (needs_CFI_cdesc): New helper function to
            determine when struct CFI_cdesc_t is used.
            (has_cfi_cdesc): Use it here...
            (get_c_type_name): ... and here.

    gcc/testsuite/ChangeLog:

            * gfortran.dg/c-prototypes_2.F90: New test.