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Date:	Thu, 22 Dec 2011 16:39:43 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: 16 byte pthread stack alignments
Message-ID:	<20111222153943.GI31936@calimero.vinschen.de>
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On Dec 22 16:31, Corinna Vinschen wrote:
> On Dec 22 09:20, Brian Ford wrote:
> > On Thu, 22 Dec 2011, Corinna Vinschen wrote:
> > 
> > > On Dec 21 15:25, Brian Ford wrote:
> > > > On Wed, 21 Dec 2011, Brian Ford wrote:
> > > >
> > > > Thanks for the fix Christopher, but I must be using the wrong compiler or
> > > > something.  Here's my next issue:
> > > >
> > > > src/winsup/cygwin/child_info.h:
> > > > In static member function static cygheap_exec_info*
> > > > cygheap_exec_info::alloc():
> > > > src/winsup/cygwin/child_info.h:115:
> > > > error: invalid use of member cygheap_exec_info::children in static member
> > > > function
> > > > src/winsup/cygwin/sigproc.cc:914:
> > > > error: from this location
> > >
> > > Did you try to drop the -Werror from the command line, for testing sake?
> > 
> > No, because in this case it actually is an error, not one converted from a
> > warning.  Am I missing something, or shouldn't the cygwin sources compile
> > without this kind of difficulty?  Is this really just a difference between
> > the Cygwin gcc-4 and the one you guys use to cross compile?
> 
> Should be basically the same compiler:
> 
>   i686-pc-cygwin-gcc (GCC) 4.5.3 20110428 (Fedora Cygwin 4.5.3-4)
> 
> The error message is kind of nonsense anyway.  The expression in question
> is
> 
>   sizeof (cygheap_exec_info) + (nprocs * sizeof (children[0]))
> 
> so it's just a `sizeof', not an actual usage of the member.  Try this
> for now:

Btw., you are apparently not running the latest gcc-4.  I just tried to
compile this file (without my patch) on Cygwin and it works fine without
any warning or error:

  $ gcc --version
  gcc (GCC) 4.5.3
  $ cygcheck -c gcc4
  Cygwin Package Information
  Package              Version        Status
  gcc4                 4.5.3-3        OK


Corinna

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

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