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Date:      Fri, 30 Apr 1999 20:15:56 +0100 (BST)
From:      Doug Rabson <dfr@nlsystems.com>
To:        obrien@NUXI.com
Cc:        John Polstra <jdp@polstra.com>, sprice@hiwaay.net, current@freebsd.org
Subject:   Re: (FWD) Re: Progs linked against libstdc++ dead...
Message-ID:  <Pine.BSF.4.05.9904302012430.59263-100000@herring.nlsystems.com>
In-Reply-To: <19990430114829.B95710@nuxi.com>

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On Fri, 30 Apr 1999, David O'Brien wrote:

> > These are good questions, and I don't know enough yet about the issues
> > surrounding vtable thunks to answer them.  
> 
> I haven't had time to really dig into this yet.  Hopefully Saturday.  I'm
> about to revert the change until I can see what the problem is and what
> the upgrade issues will be.  EGCS 1.2 *should* be out in the July/Aug
> time frame.  Of course I will try to upgrade us to it (well 1.2.1 which I
> figure will quickly follow).  The EGCS maintainers are pushing to get
> vtable thunks working properly for 1.2.
> 
> Since the Linux config files specify DEFALUT_VTABLE_THUNKS=1, no one has
> posted a bug report related to them, there is an option to turn them off,
> and this *is* -CURRENT. I may just leave them turned on by default.
> 
> Opinions?

I would prefer to keep vtable thunks turned on. The alternative produces
wretched code for multiple inheritance. Personally, I want -fnew-abi too;
gcc does some disgusting things with multiple zero-sized base classes
without it...

--
Doug Rabson				Mail:  dfr@nlsystems.com
Nonlinear Systems Ltd.			Phone: +44 181 442 9037




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