Hi massimiliano, > where can I find a list of these predefined macros, to find out if > there are others that can be useful for me? You can see which predefined macros are "live" by doing this: echo '' | g++ -E -dM -x c++ - | sort I'm not sure where you can find an exhaustive list of all possible predefined macros, and which flags control them. HTH, --Eljay
