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From: coleman@twinsun.com (Mike Coleman)
Newsgroups: gnu.gcc.bug
Subject: suggested improvement to assert.h
Message-ID: <9001200425.AA02377@spot.twinsun.com>
Date: 20 Jan 90 04:25:50 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 19

calls to the GNU assert macro cause the error message

file.c:2059: warning: ANSI C forbids conditional expr with only one void side

when compiled with -ansi -pedantic.  This can be prevented by changing

#define assert(expression)  \
  ((expression) ? 0 : __assert (#expression, __FILE__, __LINE__))

to

#define assert(expression)  \
  ((expression) ? (void) 0 : __assert (#expression, __FILE__, __LINE__))

in assert.h.  The only penalty I can see is the miniscule cost of compiling
the extra cast.

Mike Coleman
coleman@twinsun.com