X-Recipient:	archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status:	No, hits=-2.9 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,SPF_PASS
X-Spam-Check-By:	sourceware.org
To:	cygwin AT cygwin DOT com
From:	Vin Shelton <acs AT xemacs DOT org>
Subject:	New gcc-4 compile error w/getc and isspace
Date:	Sun, 08 Nov 2009 23:43:41 -0500
Lines:	48
Message-ID:	<hd86m0$73i$1@ger.gmane.org>
Mime-Version:	1.0
User-Agent:	Thunderbird 2.0.0.23 (Windows/20090812)
X-IsSubscribed:	yes
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com

Consider this module:

#include <stdio.h>
#include <ctype.h>

void
tst(FILE *fp)
{
   int c;

   while ( isspace(c = getc(fp)) )
     ;

   return;
}

gcc-4 -c t2.c
t2.c: In function ‘tst’:
t2.c:9: error: lvalue required as left operand of assignment

I'm pretty sure this module used to compile successfully under gcc-4, 
but I recently rebuilt my machine, so something may have changed in the 
configuration.

gcc-3 compiles the module without complaint.

gcc-4 will compile this version:

#include <stdio.h>
#include <ctype.h>

void
tst(FILE *fp)
{
   int c;

   //while ( isspace(c = getc(fp)) )
   while ( c = getc(fp) && isspace(c) )
     ;

   return;
}

Did something recently change in the ctype.h or stdio.h header files to 
cause this?

Regards,
   Vin


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -