https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99277
--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Thiago Macieira from comment #19) > (In reply to Jonathan Wakely from comment #18) > > We have not committed to a stable ABI for C++20 yet. > > That was my argument when creating this bug report two years ago: if it's > available in the standard headers to be used without explicit, opt-in > actions by the users, it's committed. N.B. explicit opt-in is required: -std=c++20 or similar. The default mode does not provide std::barrier etc.
