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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/107221] [13 Regression] libstdc++ EH no matching
 function __gnu_cxx::__scoped_lock::__scoped_lock
Date: Tue, 11 Oct 2022 19:36:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107221

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

https://gcc.gnu.org/g:23c3cbaed36f6d2f3a7a64f6ebda69329723514b

commit r13-3237-g23c3cbaed36f6d2f3a7a64f6ebda69329723514b
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Oct 11 20:19:08 2022 +0100

    libstdc++: Fix bootstrap for --disable-threads build [PR107221]

    The __scoped_lock type should be used unqualified so that we always
    refer to pool::__scoped_lock, which might be the dummy fallback
    implementation.

    The __mutex and __scoped_lock types in <ext/concurrence.h> already work
    fine without __GTHREADS being defined, but that header isn't included at
    all unless _GLIBCXX_HOSTED !=3D 0. The fallback implementation should be
    used for ! _GLIBCXX_HOSTED instead of for !defined __GTHREADS.

    libstdc++-v3/ChangeLog:

            PR bootstrap/107221
            * libsupc++/eh_alloc.cc (pool): Change preprocessor condition
            for using __mutex from __GTHREADS to _GLIBCXX_HOSTED.
            (pool::allocate): Remove namespace qualification to use
            pool::__scoped_lock instead of __gnu_cxx::__scoped_lock.=