[Bug c/119950] __builtin_constant_p warning with -Wdeprecated-non-prototype inconsistent

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119950

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-15 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:3913d958e203dbf3c4a0527e7bc03c684e3f05a4

commit r15-10187-g3913d958e203dbf3c4a0527e7bc03c684e3f05a4
Author: Florian Weimer <fweimer@redhat.com>
Date:   Thu May 1 19:06:45 2025 +0200

    c: Suppress -Wdeprecated-non-prototype warnings for builtins

    Builtins defined with BT_FN_INT_VAR etc. show as functions without
    a prototype and trigger the warning.

    gcc/c/

            PR c/119950
            * c-typeck.cc (convert_arguments): Check for built-in
            function declaration before warning.

    gcc/testsuite/

            * gcc.dg/Wdeprecated-non-prototype-5.c: New test.

    (cherry picked from commit b6d37ec1dd2a228d94e7b5b438f3aa53684316bc)