How can I find out cc or cpp symbols?

[Felix Lee]

Here's an extraordinarily silly idea for <default.h>.  Since the list
of predefined symbols can vary due to environment and compilation
flags such as -U, <default.h> should look something like
	#ifdef unix
	#define unix 1
	#endif
except that this would break with "-Uunix -Dunix=bsd", so you have
	#ifdef unix
	/* #define unix 1 */
	#endif

I'd complain if the compiler documentation didn't list predefined
symbols or tell you a method of finding predefined symbols.

Now, being able to say something like #pragma dumpdefines at an
arbitrary point would be interesting.
--
Felix Lee	flee at shire.cs.psu.edu	*!psuvax1!shire!flee