X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:message-id:subject:mime-version
	:content-type:content-transfer-encoding; q=dns; s=default; b=JUs
	SpH8EsQLp9Uu1mvPhxVFVC+HLPwzgBY5y/nQyqMn1D7G1pEiu2TUc5SMg+LH0CgS
	c8VcJxK7HNKELTTkabTdmcXsFZ73e+D6hD6T7YaWhdVzD8fCTzXpVzjhIgB3sTyT
	XzEk5yLssNTYXSvq7ip/a39lX1B0bOVac4jm3WBI=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:message-id:subject:mime-version
	:content-type:content-transfer-encoding; s=default; bh=c7R3DFgRE
	JGCQQiJ9khggGE7udo=; b=hLOpsoqm18r1yhZRjp8/rjTPdec8oATPEbv4OBsny
	Krua9h8fSyp5Jex8akJku8PysehQnVmO5UWVmE0l5AetBiTbPw/uZdh2AM90WNls
	P5gNUaMIwF1NyC9daSyaWGbkl/GHSk7p6I3xCzyqAL2u1VzcFaptzxShLcqiAu03
	fo=
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
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=1.0 required=5.0 tests=BAYES_20,KAM_LAZY_DOMAIN_SECURITY,RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=no version=3.3.2 spammy=H*MI:zimbra, H*x:Win, H*MI:JavaMail, Best
X-HELO:	smtp-o-1.desy.de
X-Clacks-Overhead:	GNU Terry Pratchett
Date:	Sun, 6 Mar 2016 23:27:13 +0100 (CET)
From:	"Azatyan, Anushavan" <anushavan DOT azatyan AT desy DOT de>
To:	cygwin AT cygwin DOT com
Message-ID:	<1129585202.10528386.1457303233509.JavaMail.zimbra@desy.de>
Subject:	library compilation undefined reference to extern function
MIME-Version:	1.0

Hi,

I am compiling a huge library, which is written and compiled under Ubuntu, I have fixed some problems to get it compiled in cygwin.
The main() function is inside library. I stopped in some point which goes different in cygwin.
I have some functions which are declared as - extern void func(void);   Linker gives error - undefined reference to `func()'

then I tried with this to compare differences.. 

#include <iostream>
using namespace std;
extern void foo(void);
int main()
{
        cout<<" Print ";
        foo();
        return 0;
}

a very simple example I can compile in linux (Ubuntu) without any problem, but in cygwin it goes with linker errors - undefined reference, in both systems I use  

$ gcc -c -Wall -fpic filename.cc
$ gcc -shared -o libfoo.so filename.o

commands.
I could not find solution of this anywhere.

Thank you, 
Best regards, Anushavan

--
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 -