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Date: Tue, 7 Apr 2009 09:45:51 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: All clear [was Re: [1.7]: For the love of god, don't update!]
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On Apr  7 00:12, Dave Korn wrote:
> Christopher Faylor wrote:
> > On Mon, Apr 06, 2009 at 08:08:33PM +0200, Corinna Vinschen wrote:
> >> On Apr  6 13:33, Christopher Faylor wrote:
> >>> On Mon, Apr 06, 2009 at 06:29:43PM +0200, Corinna Vinschen wrote:
> >>>> Wouldn't it help if libc.a, libm.a etc. wouldn't export any symbols at
> >>>> all?  I mean, eventually there's libcygwin.a linked in which satisfies
> >>>> all of the requested symbols.  What would break if the secondary libs
> >>>> pointing to cygwin1.dll would be stubs?
> >>> We rehashed all of this years ago.  IIRC, some configuration scripts
> >>> actually look for symbols explicitly in the libraries.
> >> Hmm, too bad.  So it was a naive thought.
> > 
> > I think I had the same thought while resisting the whole concept of
> > speclib.
> > 
> > Maybe I should have resisted harder.
> 
>   I think there's a strong argument that those configuation scripts are doing
> a very wrong thing in that they're trying to second-guess internal
> implementation details of the operating environment.  If you remember, was
> there a good reason why they couldn't answer the same questions solely using
> link tests?  Grepping through library symbols seems quite fragile when so many
> standard C library functions are permitted to be implemented as macros.

I assume they use nm rather than grep.

But maybe we should give up on such broken configure scripts?


Corinna

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

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