# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1250087116 -7200
# Node ID 0d28b7568243fbc9ded4f6c9224ae2d111b6adc2
# Parent  6f25212efacd3dfd305aafbe7214b23ba6b9f7b6
Disable multithread support by default on Cygwin 1.5.x.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-08-12  Bruno Haible  <bruno@clisp.org>
+
+	Disable multithread support by default on Cygwin 1.5.x.
+	* m4/threadlib.m4 (gl_THREADLIB_EARLY_BODY): On Cygwin 1.5.x and older,
+	set gl_use_threads=no if not specified otherwise.
+
 2009-08-11  Bruno Haible  <bruno@clisp.org>
 
 	Avoid compilation error on NetBSD 5.0.
diff --git a/m4/threadlib.m4 b/m4/threadlib.m4
--- a/m4/threadlib.m4
+++ b/m4/threadlib.m4
@@ -1,4 +1,4 @@
-# threadlib.m4 serial 3 (gettext-0.18)
+# threadlib.m4 serial 4 (gettext-0.18)
 dnl Copyright (C) 2005-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -56,7 +56,16 @@
          dnl Disable multithreading by default on OSF/1, because it interferes
          dnl with fork()/exec(): When msgexec is linked with -lpthread, its
          dnl child process gets an endless segmentation fault inside execvp().
+         dnl Disable multithreading by default on Cygwin 1.5.x, because it has
+         dnl bugs that lead to endless loops or crashes. See
+         dnl <http://cygwin.com/ml/cygwin/2009-08/msg00283.html>.
          osf*) gl_use_threads=no ;;
+         cygwin*)
+               case `uname -r` in
+                 1.[0-5].*) gl_use_threads=no ;;
+                 *)         gl_use_threads=yes ;;
+               esac
+               ;;
          *)    gl_use_threads=yes ;;
        esac
      fi