[Bug c++/100879] [10/11/12 Regression] gcc is complaining of a signed compare when comparing enums of different types (same underlying type)

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100879

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jason Merrill
<ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:4f2819223873266b4cdfa7af54752a37d1ebd665

commit r11-8628-g4f2819223873266b4cdfa7af54752a37d1ebd665
Author: Jason Merrill <ja...@redhat.com>
Date:   Tue Jun 8 17:48:49 2021 -0400

    c++: remove redundant warning [PR100879]

    Before my r277864, build_new_op promoted enums to int before passing them
on
    to cp_build_binary_op; after that commit, it doesn't, so
    warn_for_sign_compare sees the enum operands and gives a redundant warning.
    This warning dates back to 1995, and seems to have been dead code for a
long
    time--likely since build_new_op was added in 1997--so let's just remove it.

            PR c++/100879

    gcc/c-family/ChangeLog:

            * c-warn.c (warn_for_sign_compare): Remove C++ enum mismatch
            warning.

    gcc/testsuite/ChangeLog:

            * g++.dg/diagnostic/enum3.C: New test.