[Bug libgomp/107041] [13/14 Regression] C '-Wenum-int-mismatch' diagnostic for OpenACC 'acc_on_device'

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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107041

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:f8646b8dcb18721e776c39117f62aee7ee571f21

commit r13-7246-gf8646b8dcb18721e776c39117f62aee7ee571f21
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Apr 20 19:26:17 2023 +0200

    c: Avoid -Wenum-int-mismatch warning for redeclaration of builtin
acc_on_device [PR107041]

    The new -Wenum-int-mismatch warning triggers with -Wsystem-headers in
    <openacc.h>, for obvious reasons the builtin acc_on_device uses int
    type argument rather than enum which isn't defined yet when the builtin
    is created, while the OpenACC spec requires it to have acc_device_t
    enum argument.  The header makes sure it has int underlying type by using
    negative and __INT_MAX__ enumerators.

    I've tried to make the builtin typegeneric or just varargs, but that
    changes behavior e.g. when one calls it with some C++ class which has
    cast operator to acc_device_t, so the following patch instead disables
    the warning for this builtin.

    2023-04-20  Jakub Jelinek  <jakub@redhat.com>

            PR c/107041
            * c-decl.cc (diagnose_mismatched_decls): Avoid -Wenum-int-mismatch
            warning on acc_on_device declaration.

            * gcc.dg/goacc/pr107041.c: New test.

    (cherry picked from commit 3d7ab53d6c59499624aa41c8dea0664976820b3b)