GNU bug report logs - #15094
Fix for posix_memalign on Cygwin

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ken Brown <kbrown <at> cornell.edu>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#15094: closed (Fix for posix_memalign on Cygwin)
Date: Wed, 14 Aug 2013 19:12:02 +0000

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Your message dated Wed, 14 Aug 2013 15:11:09 -0400
with message-id <520BD64D.2000906 <at> cornell.edu>
and subject line Re: bug#15094: Fix for posix_memalign on Cygwin
has caused the debbugs.gnu.org bug report #15094,
regarding Fix for posix_memalign on Cygwin
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: Ken Brown <kbrown <at> cornell.edu>
To: emacs-bug <bug-gnu-emacs <at> gnu.org>
Subject: Fix for posix_memalign on Cygwin
Date: Wed, 14 Aug 2013 12:22:18 -0400

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Cygwin allows applications to supply their own malloc but not, until 
today, their own posix_memalign.  This has caused problems with the GTK 
build of Emacs on Cygwin.  The problem became worse with the latest Glib 
update.  Anyone who wants the gory details can find them starting here:

  http://cygwin.com/ml/cygwin-xfree/2013-08/msg00018.html

Cygwin was just patched today to allow applications to supply their own 
posix_memalign (but not their own memalign), which solves the Glib 
problem.  But posix_memalign in gmalloc.c calls memalign, so I need to 
make sure that it calls Emacs's memalign.  The attached patch does this. 
 Is this a reasonable way to handle the problem?  (I plan to also add 
an explanatory comment.)

Thanks.

Ken

[memalign.patch (text/plain, attachment)]

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From: Ken Brown <kbrown <at> cornell.edu>
To: 15094-done <at> debbugs.gnu.org
Subject: Re: bug#15094: Fix for posix_memalign on Cygwin
Date: Wed, 14 Aug 2013 15:11:09 -0400

On 8/14/2013 12:22 PM, Ken Brown wrote:
> Cygwin allows applications to supply their own malloc but not, until
> today, their own posix_memalign.  This has caused problems with the GTK
> build of Emacs on Cygwin.  The problem became worse with the latest Glib
> update.  Anyone who wants the gory details can find them starting here:
>
>    http://cygwin.com/ml/cygwin-xfree/2013-08/msg00018.html
>
> Cygwin was just patched today to allow applications to supply their own
> posix_memalign (but not their own memalign), which solves the Glib
> problem.  But posix_memalign in gmalloc.c calls memalign, so I need to
> make sure that it calls Emacs's memalign.  The attached patch does this.
>   Is this a reasonable way to handle the problem?  (I plan to also add
> an explanatory comment.)

I made this more complicated than necessary.  I've installed a simpler 
version as bzr revision 113880, and I'm closing the bug.

Ken

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