https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94268
--- Comment #2 from fdlbxtqi <euloanty at live dot com> --- The hacking code is here. https://bitbucket.org/ejsvifq_mabmip/fast_io/src/reserver_test/include/fast_io_legacy_impl/cpp/libstdc%2B%2B_libc%2B%2B.h https://bitbucket.org/ejsvifq_mabmip/fast_io/src/reserver_test/include/fast_io_legacy_impl/cpp/general.h https://bitbucket.org/ejsvifq_mabmip/fast_io/src/reserver_test/include/fast_io_legacy_impl/cpp/streambuf_io_observer.h