ppdc and predefined variables

[Smith Kennedy]

Hello,

I was wondering whether ppdc had any "predefined" macros or  
definitions, the same way that the C preprocessor has a number of  
predefined macros:

	http://en.wikipedia.org/wiki/C_preprocessor#Compiler-specific_predefined_macros

If so, they don't appear to be documented in the man page or the other  
HTML documentation, found here (Leopard):

	http://localhost:631/help/ref-ppdcfile.html?TOPIC=References&QUERY=

or here (Snow Leopard):

	http://localhost:631/help/ppd-compiler.html?TOPIC=Programming&QUERY=

In particular, having a predefined macro for CUPS_VERSION for telling  
the version of CUPS would be nice.  I am sure there are some others  
that might be useful as well but none come to mind right now.

Thanks for any help!
Smith