C++ Debug Messages

Hi everybody. I was wondering if there is a way in C++ to have debug messages, and the ability to turn them off. For example, lets say I would like my program to have two modes. One mode is the mode where all the debug messages are printed, and another where they are not. Is it possible to do through the compiler? Ie to choose whether to compile the program with the debug info? I looked some stuff on google, and found some strange way in Visual C++. How about g++? Example would be great too. Thanks in advance.

re: C++ Debug Messages

Here's the G++ man page, I'm sure you can figure it out from there ;)

re: C++ Debug Messages

Have a look at log4C. It's a clone of the famous log4J package.

kind regards,

Jos