https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84749
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2018-03-08 CC| |msebor at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- I recently noticed this too. For instance, here -w suppresses -Wreturn-type but doesn't suppress the warning about -Wmudflap being no longer supported: $ grep -B1 "Warn(" /src/gcc/svn/gcc/c-family/c.opt | head -n2 Wmudflap C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported) $ echo "f() { }" | gcc -S -Wall -Wextra -Wmudflap -Wreturn-type -w -xc - xgcc: warning: switch ‘-Wmudflap’ is no longer supported