macOS GCC: Enabling nested functions

[Hexatron]

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?

 

[autorelease]

You pass -fnested-functions as an argument to gcc. It's not a part of gcc you 'enable,' it's an option you specify when compiling your program.

$ gcc -fnested-functions -o prog prog.c

If you're using Xcode, add -fnested-functions to 'Other C Flags' in the Build tab of Project Info.

 

[pstoehr]

Hi,

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?

gcc -fnested-functions <yourfile>

might be the solution.

Best regards
Peter