Re: gcc/g++-warning.spec: remove -Wswitch-enum?

[Paul Eggert]

For what it's worth, Emacs configure.ac disables -Wswitch-default (too many 
warnings) and -Wswitch (since -Wall implies -Wswitch, and the Emacs folks want 
to shorten the command line).  Coreutils configure.ac disables both 
-Wswitch-enum (unnecessary, since Gnulib also disables it) and -Wswitch-default.

With this and your comment in mind, how about if we add -Wswitch-default to 
build-aux/gcc-warning.spec? It doesn't seem to be of much use in practice.