Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!uxc.cso.uiuc.edu!tank!mimsy!chris
From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.ultrix
Subject: C compiler (and lint) bug on DS3100
Message-ID: <18740@mimsy.UUCP>
Date: 25 Jul 89 23:00:34 GMT
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 24

The DS3100 C compiler (derived from the MIPS compilers) does not
believe in expressions of the form

	integral_expr ? void_expr : void_expr

such as this [useless] example:

	main() { 1 ? (void) 1 : (void) 0; return 0; }

This is particularly a problem in void-valued macros built out of 
other void-valued macros, e.g.,

	#define	putone(x) ((void) writeit(x, EXIT_ON_ERROR))
	#define putalternative(a, b) (thisway ? putone(a) : putone(b))

For now, the solutions available are

	#define void int

(or equivalent) or rewriting the code to use if/then/else or to avoid
void-valued expressions in ?: statements.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris