[Bug libstdc++/107511] [13 Regression] gcc-13-20221030 failure to build on Cygwin due to lack of secure_getenv

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107511

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>:

https://gcc.gnu.org/g:f505f37a8e5a7646af4038b5c46f72d8a05dc7f0

commit r13-3684-gf505f37a8e5a7646af4038b5c46f72d8a05dc7f0
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Thu Nov 3 11:44:47 2022 +0000

    libstdc++: Define _GNU_SOURCE for secure_getenv on Cygwin [PR107511]

    As in r12-6867-ge20486d508afdf we need to define _GNU_SOURCE explicitly
    for Cygwin, because configure finds it in libc but it isn't declared
    unless we request it.

    libstdc++-v3/ChangeLog:

            PR libstdc++/107511
            * libsupc++/eh_alloc.cc (_GNU_SOURCE): Define.