Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com X-Sent: 18 Mar 2002 05:48:11 GMT Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 7bit MIME-Version: 1.0 To: tprince AT computer DOT org Cc: cygwin AT cygwin DOT com From: "Christopher Currie" Subject: Re: C++ link errors using gcc from cvs X-Sent-From: christopher AT currie DOT com Date: Sun, 17 Mar 2002 21:48:10 -0800 (PST) X-Mailer: Web Mail 5.0.6-5 Message-Id: <20020317214811.9904.c000-h010.c000.wm@mail.currie.com.criticalpath.net> On Sun, 17 March 2002, Tim Prince wrote > I thought everyone recognized that mixing c++ libraries between gcc-3.1 and > gcc-2.95 was even less likely to work than between gcc-3.0x and 2.95. Even > the use of 2.95 with non-default stack alignment is enough to break the > libraries which come with it, and commercial compilers which aim at a degree > of gcc compatibility don't try to mix libraries. Yes, it's easy to break the > cygwin g++/g77 installation by a parallel installation of gcc-3.1, even with > the best of intentions, but each compiler should default to its own copy of > libstdc++, if you install them normally in separate directories. That was my understanding as well, and I allowed gcc the default installation directory of /usr/local. But what seems to be happening (confirmed by using -Wl,-M to trigger a link map from the linker) is that the g++ in /usr/bin is attempting to link to /usr/local/lib/libstdc++.a, and the g++-3.1 in /usr/local/bin is attempting to link to /usr/lib/libstdc++.a, and I'm not sure why. It's probably an installation SNAFU on my part, but I'm having a hard time tracking it down. Christopher ------------------------------------------------------- With reasonable men I will reason; with humane men I will plead; but to tyrants I will give no quarter. -- William Lloyd Garrison -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/