https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99277
--- Comment #19 from Thiago Macieira <thiago at kde dot org> --- (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. The change may not break the ABI inside of libstdc++.so.6, but so long as it breaks ABI of some library, it's an ABI break. I understand that's not what your current policy says, but it doesn't change reality. So please don't do it.
