_sys_* etc.

[Doug Gwyn]

In article <1258 at ho95e.UUCP> wcs at ho95e.UUCP (Bill Stewart 1-201-949-0705 ihnp4!ho95c!wcs HO 2G202) writes:
>... why not let
>_sys_ and _machine_ be preprocessor variables, leading to
>	#define	_sys_	SysVR2
>	#define	_machine_	u3b2
>and
>	#if _machine_ = vax

Because the last line has no meaning unless the symbol `vax' is
also macro defined to something like an integer constant (further, all
possible system symbols would have to be assigned different constant
values).  (The `=' is not a string compare as in Bourne shell scripts.)

Nice try, though.