https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67956
--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- There has been some discussion recently of adding -Wformat-pedantic (see bug 67479), which would seem reasonable to me. A syslog format also seems reasonable (but we already have bug 15338 tracking that idea). A special-case option for only this single case of non-portable formats seems more dubious to me.