[Bug build/29966] Cannot build anymore for win32 thread model of gdb

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29966

--- Comment #31 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tom Tromey <tromey@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=2124b2de4bba05063218501dcccfc4cffe648cda

commit 2124b2de4bba05063218501dcccfc4cffe648cda
Author: Tom Tromey <tromey@adacore.com>
Date:   Mon Jan 9 07:43:29 2023 -0700

    Set _WIN32_WINNT in common.m4 configure check

    GCC recently added support for the Windows thread model, enabling
    libstdc++ to support Windows natively.  However, this supporrt
    requires a version of Windows later than the minimum version that is
    supported by GDB.

    PR build/29966 points out that the GDB configure test for std::thread
    does not work in this situation, because _WIN32_WINNT is not defined
    in test program, and so <thread> seems to be fine.

    This patch is an attempt to fix the problem, by using the same setting
    for _WIN32_WINNT at configure time as is used at build time.

    I don't have access to one of the older systems so I don't think I can
    truly test this.  I did do a mingw cross build, though.  I'm going to
    ask the bug reporter to test it.

    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29966

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