Hey, I'm working my way through a book about learning C and I'm trying to compile code with nested functions. I understand that these have been disabled for a security reason since the switch to Intel, but apparently they can be re-enabled. Everything I've found tells me to "use -fnested-functions" and change something with CFLAGS to enable the nested functions in GCC. I don't know how I go about doing this. What can I do in Terminal to enable nested functions?