https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78133
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> --- This is still on my list of things to take care of before the release but I haven't had a chance to work on it yet. Sorry about that. I think the minimum safe solution is to xfail the tests for the target. Ultimately, if it doesn't yet, GCC should probably be enhanced to warn on %a with -Wformat, and -Wformat-length should treat %a the same as newlib (as an ordinary string perhaps?)
