From owner-freebsd-ports@FreeBSD.ORG  Wed Apr 13 18:59:09 2011
Return-Path: <owner-freebsd-ports@FreeBSD.ORG>
Delivered-To: freebsd-ports@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id E234F1065676
	for <freebsd-ports@FreeBSD.org>; Wed, 13 Apr 2011 18:59:09 +0000 (UTC)
	(envelope-from bf1783@googlemail.com)
Received: from mail-pv0-f182.google.com (mail-pv0-f182.google.com
	[74.125.83.182])
	by mx1.freebsd.org (Postfix) with ESMTP id B93AB8FC15
	for <freebsd-ports@FreeBSD.org>; Wed, 13 Apr 2011 18:59:09 +0000 (UTC)
Received: by pvg11 with SMTP id 11so421507pvg.13
	for <freebsd-ports@FreeBSD.org>; Wed, 13 Apr 2011 11:59:09 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=googlemail.com; s=gamma;
	h=domainkey-signature:mime-version:reply-to:date:message-id:subject
	:from:to:cc:content-type;
	bh=3FZeWLNFz0DVmYDhsRzztBZD2fzcPiBLKA+aTnrY+ow=;
	b=L5JT59jgYVcn6oecnL5ytm0BXIcUP+m1DOXtujOCXimhDDdjhcM3aPb9qrBhJvVJIN
	VgwKjyMUJY//Hka6KzfOJDWHGfSreaRLLeW+pgTtKdX7rdHfXoATa1fqlDMQIDfNrGxl
	+YRe2RT3oqk4+sYJT+e0cGPiC3g6XCKrPWWLc=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma;
	h=mime-version:reply-to:date:message-id:subject:from:to:cc
	:content-type;
	b=KTwjLk3Ouk4NTZ+jVvwNJZIhJGLlSgpwCqON1mOnSD3EFpRKNHbKliwt2rJTr6knnV
	X6Fq0n5ygVmOz9W0jNxWlNfpkL2px/PZm6Mawz+UnfTRS+sFMRazeZxzbrAaxZH1F8bO
	CvFz96dfqmIz2i2AgTZjvm9OZ4sdKGGjHgCPo=
MIME-Version: 1.0
Received: by 10.143.84.9 with SMTP id m9mr7733207wfl.54.1302721149170; Wed, 13
	Apr 2011 11:59:09 -0700 (PDT)
Received: by 10.68.41.129 with HTTP; Wed, 13 Apr 2011 11:59:09 -0700 (PDT)
Date: Wed, 13 Apr 2011 18:59:09 +0000
Message-ID: <BANLkTimPw=7_3bmtXzPKoyJ2w7ihaszLaQ@mail.gmail.com>
From: "b. f." <bf1783@googlemail.com>
To: "O. Hartmann" <ohartman@zedat.fu-berlin.de>
Content-Type: text/plain; charset=ISO-8859-1
Cc: freebsd-ports@FreeBSD.org
Subject: Re: Does USE_GCC= 4.5+ also set C++ and Fortran to g++45/46 and
	gfortran45/46?
X-BeenThere: freebsd-ports@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: bf1783@gmail.com
List-Id: Porting software to FreeBSD <freebsd-ports.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-ports>,
	<mailto:freebsd-ports-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-ports>
List-Post: <mailto:freebsd-ports@freebsd.org>
List-Help: <mailto:freebsd-ports-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-ports>,
	<mailto:freebsd-ports-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 13 Apr 2011 18:59:10 -0000

> Using a self brewn port of a scientific software package which is
> intended to use gcc 4.5 or higher, I use "USE_GCC= 4.5+" in the top
> level Makefile. But I get an error when starting the application:
>
> /libexec/ld-elf.so.1: /usr/lib/libstdc++.so.6: version GLIBCXX_3.4.11
> required by /usr/local/isis/3.2.1/bin/qview not found
>
> Building the software without the ports-framework but with explicitely
> set GCC/G++/GFORTRAN results in a working binary.
>
> My question: is USE_GCC setting C++ and Fortran compilers as desired as
> well as the C compiler?

You should be using USE_FORTRAN if a Fortran compiler is needed (this
also enforces USE_GCC=4.5), and USE_GCC if only C and/or C++ compilers
are needed.  This should set the right variables in your build
environment (see ports/Mk/bsd.gcc.mk), but a build can still fail if
your local, port, or distribution Makefiles do not respect CC, CXX,
CFLAGS, CXXFLAGS, F77, FC, FFLAGS, or LDFLAGS.  It sounds as if this
is the case, and the Wl,-rpath=... component of the flags added in
bsd.gcc.mk is not being used.

b.