How can I tell gcc to warn (or fail) on switch/case statements without a break?

Question

I have a complicated switch statement, and I forgot to put a break at the end of one of the cases. This is quite legal, and as a resu

Answer 1

GCC 7 has a warning enabled with -Wextra or -Wimplicit-fallthrough(=[1-5])?: https://developers.redhat.com/blog/2017/03/10/wimplicit-fallthrough-in-gcc-7/