https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107221
--- 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:23c3cbaed36f6d2f3a7a64f6ebda69329723514b commit r13-3237-g23c3cbaed36f6d2f3a7a64f6ebda69329723514b Author: Jonathan Wakely <jwak...@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 != 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.
