X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: No, hits=-2.5 required=5.0 	tests=AWL,BAYES_00,SPF_PASS
X-Spam-Check-By: sourceware.org
Message-ID: <49CAC59C.4080306@users.sourceforge.net>
Date: Wed, 25 Mar 2009 19:00:28 -0500
From: "Yaakov (Cygwin/X)" <yselkowitz AT users DOT sourceforge DOT net>
User-Agent: Thunderbird 2.0.0.21 (Windows/20090302)
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: gcc4: extern inline vs. c99
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
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

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Dave,

gcc-4 -std=c99 appears to be treating extern inline functions as if they
were marked dllexport, leading to all sorts of linking problems.  STC:

$ cat > test-ntohs1.c <<EOF
#include <netinet/in.h>

extern void foo (uint32_t);

int main(void) {
    uint32_t a = 10;
    htonl(a);
    foo(a);
    return 0;
}
EOF

$ cat > test-ntohs2.c <<EOF
#include <netinet/in.h>

void foo(uint32_t i) {
        htonl(i);
}
EOF

$ gcc-4 -o test-ntohs.exe test-ntohs1.c test-ntohs2.c

$ gcc-4 -std=c99 -o test-ntohs.exe test-ntohs1.c test-ntohs2.c
/var/tmp/ccUwNnD4.o:test-ntohs2.c:(.text+0x0): multiple definition of
`___ntohl'
/var/tmp/ccise4Pi.o:test-ntohs1.c:(.text+0x0): first defined here
/var/tmp/ccUwNnD4.o:test-ntohs2.c:(.text+0x15): multiple definition of
`___ntohs'
/var/tmp/ccise4Pi.o:test-ntohs1.c:(.text+0x15): first defined here
collect2: ld returned 1 exit status


Yaakov
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (Cygwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEAREIAAYFAknKxZwACgkQpiWmPGlmQSNL+wCgua1JV2lEwh9wCy1IzKztaBjL
uEwAnioFrNpd0IpIKa/MhnMPcNyUgzmQ
=drUK
-----END PGP SIGNATURE-----

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