https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100005
--- Comment #12 from Thiago Macieira <thiago at kde dot org> --- (In reply to Richard Biener from comment #11) > Invalid. Note we can't really diagnose GNU extern inline address-taking > since > by definition that's allowed (just the definition needs to come from > elsewhere). Understood. Thanks for looking into the report. Out of curiosity, how does one provide an extern inline's out-of-line copy in C++?