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Date: Mon, 29 Jul 2013 21:26:58 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: cyglsa-config not working properly in cygwin 1.7.22
Message-ID: <20130729192658.GH4166@calimero.vinschen.de>
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References: <2B53C7C1-54F1-4477-91B4-F23CD4A55F0F AT basissw DOT com> <20130729165818 DOT GE4166 AT calimero DOT vinschen DOT de> <6A02E3C2-3208-4526-A066-C76AF86AA372 AT basissw DOT com> <20130729190814 DOT GF4166 AT calimero DOT vinschen DOT de>
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On Jul 29 21:08, Corinna Vinschen wrote:
> On Jul 29 13:21, J. P. Abelanet wrote:
> > On Jul 29, 2013, at 11:58 AM, Corinna Vinschen wrote:
> > 
> > > 
> > > No.  I can confirm that this happens, and it seems the cyglsa.dll
> > > doesn't get loaded at all.  But as for the reason, I have no idea.
> > > It's the same source code we're using for ages.  We switched the
> > > compiler to build it, but that's it.  So, for some reason, when
> > > building the stuff with mingw-w64-gcc, the result is not runnable.
> > > 
> > > Sorry, but I'm at a loss right now.
> > > 
> > Thanks for the quick reply.  If in the future you have any ideas,
> > I'll be happy to test them out.
> 
> I think I found the problem.  The older compiler didn't reorder
> functions for optimization purposes, but the new one does.  The entry
> point for the cyglsa DLL was not explicitely mentioned, but it was based
> on the fact that it is the first function in the source code.
> 
> However, the new compiler reorders function by default with -O2
> optimization.  So the entry point was not at the start of the executable
> anymore and the LSA failed to load the cyglsa DLL.  I changed the
> Makefile to specify the entry point of the DLL explicitely to make sure
> the right function is called at load time.
> 
> This seems to work again in my testing on 32 and 64 bit, but more
> testing never hurts.  So I'd like to ask you to check the today's
> developer snapshot from http://cygwin.com/snapshots/ and copy the cyglsa
> DLL from the snapshot into /bin/cyglsa.  Given that the DLL there isn't
> loaded, you should be able to overwrite it, like this:
> 
> On a 32 bit OS:
> 
>   cp /bin/cyglsa.dll /bin/cyglsa/
> 
> On a 64 bit OS:
> 
>   cp /bin/cyglsa64.dll /bin/cyglsa/
> 
> Kep in mind that the x86 snapshots contains both DLLs, while the x86_64
> snapshot only contains the 64 bit DLL.
> 
> > Thanks for a great product overall -
> 
> Thanks to you for the report!  The today's 32 and 64 bit snapshots
> should be uploaded in an hour at the latest.

Snapshots are up.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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