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bug#14569: 24.3.50; bootstrap fails on Cygwin

From: Ken Brown
Subject: bug#14569: 24.3.50; bootstrap fails on Cygwin
Date: Mon, 24 Jun 2013 13:16:37 -0400
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2

On 6/24/2013 12:55 PM, Paul Eggert wrote:
On 06/24/13 08:51, Ken Brown wrote:
The Cygwin port uses Emacs's allocator.

I just looked at Emacs's allocator, and I was wrong:
it tries to be thread-safe, if HAVE_PTHREAD is defined.
Is it defined on Cygwin?  If not, that's a bug; if so,
possibly there is still an incompatibility between
Cygwin threading and Emacs's allocator, but it'll
require some Cygwin expertise to debug.

Yes, HAVE_PTHREAD is defined on Cygwin.

At any rate *this* bug is now fixed, so I'm marking it
as done.  If the Cygwin port has strange memory-related
problems in the future, you might try the following patch (not
that it's necessarily the right thing...).

=== modified file 'configure.ac'
--- configure.ac        2013-06-24 14:27:25 +0000
+++ configure.ac        2013-06-24 16:53:54 +0000
@@ -1805,7 +1805,7 @@ dnl See comments in aix4-2.h about maybe
  case "$opsys" in
    ## darwin ld insists on the use of malloc routines in the System framework.
-  darwin|sol2-10) system_malloc=yes ;;
+  cygwin|darwin|sol2-10) system_malloc=yes ;;

  if test "${system_malloc}" = "yes"; then

I've tried this, but it doesn't work. I would be glad to switch to Cygwin's malloc if I could, but I haven't been able to figure out how. See



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