From owner-freebsd-ports  Mon Jul  6 15:49:50 1998
Return-Path: <owner-freebsd-ports@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id PAA06468
          for freebsd-ports-outgoing; Mon, 6 Jul 1998 15:49:50 -0700 (PDT)
          (envelope-from owner-freebsd-ports@FreeBSD.ORG)
Received: from alpo.whistle.com (alpo.whistle.com [207.76.204.38])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA06462;
          Mon, 6 Jul 1998 15:49:44 -0700 (PDT)
          (envelope-from terry@whistle.com)
Received: (from daemon@localhost)
	by alpo.whistle.com (8.8.5/8.8.5) id PAA05814;
	Mon, 6 Jul 1998 15:39:10 -0700 (PDT)
Received: from tlambert.whistle.com(207.76.205.208)
 via SMTP by alpo.whistle.com, id smtpd005812; Mon Jul  6 22:39:09 1998
Message-ID: <35A1519D.60D4@whistle.com>
Date: Mon, 06 Jul 1998 15:37:18 -0700
From: Terry Lambert <terry@whistle.com>
Organization: Whistle Communications
X-Mailer: Mozilla 3.01Gold (Win95; I)
MIME-Version: 1.0
To: obrien@FreeBSD.ORG, jdp@FreeBSD.ORG, freebsd-ports@FreeBSD.ORG
Subject: gcc/g++ 2.8.1 port maintainers/modifiers
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-ports@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

There appears to be a problem with the non-installation of the
include files in the port.

Specifically, the include file "typeinfo" is not installed,
and it seems that there is not a sperate installation of a
"include/g++28/" directory, in general, and that an installed
"/usr/local/bin/g++28" therefore uses the previous "g++"
includes, which are for g++ 2.7.2.

This results in failures when attempting to use runtime type
information (RTTI).  This is just the most obvious failure;
I am sure there are other compiler/include file mismatches...


Specifically, things like:

#include <typeinfo>

// pseudocode... too lazy, too obvious, takes too much space...
class foo {
    ...
};

class fee : public foo {
    ...
};

class fum : public foo {
   ...
};

// real code follows...
void
gettype( char *s, foo *obj)
{
    if( typeid(foo) == typeid(*obj))
	printf( "object named '%s' is of type foo\n", s);
    else if( typeid(fee) == typeid(*obj))
	printf( "object named '%s' is of type fee\n", s);
    else
	printf( "object named '%s' is an unknown subclass (%s), s,
		typeid(*obj).name);
}

main()
{
    foo *foo1;
    fee *foo2;
    fum *foo3;

    foo1 = new foo;
    foo2 = new fee;
    foo3 = new fum;

    gettype( "foo1", foo1);
    gettype( "foo2", foo2);
    gettype( "foo3", foo3);
}

Fail because the wrong <typeinfo> gets included.

This works correctly when you use the gnu configure based install.


I recommend making the compiler reference an ./include/g++28/
directory, and installing the correct include hierarchy there,
wherever that is (probably /usr/local/) to resolve the problem.

Sorry, I don't have patches; I don't quite follow the way the
ports are supposed to actually work, and am too buried to be
able to pitch in on fixing the port.  8-(.

-- Regards,
-- Terry Lambert
-- Whistle Communications, Inc.

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-ports" in the body of the message