https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95623
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- Your compiler is configured with "Thread model: win32" and that doesn't support std::thread, so the <thread> header doesn't define anything.