How do you create a debug only function that takes a variable argument list? Like printf()

Question

I\'d like to make a debug logging function with the same parameters as printf. But one that can be removed by the pre-processor during optimized builds.

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Answer 1

What platforms are they not available on? stdarg is part of the standard library:

http://www.opengroup.org/onlinepubs/009695399/basedefs/stdarg.h.html

Any platform not providing it is not a standard C implementation (or very, very old). For those, you will have to use varargs:

http://opengroup.org/onlinepubs/007908775/xsh/varargs.h.html