https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99832
--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> --- Created attachment 61536 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61536&action=edit Add abi tag to system_clock::to_time_t Here's a new patch, which includes a test to verify that the abi_tag is present when it should be.