Description: define __private_extern__
 For some reason, autoconf doesn't define this properly. This is a quick
 fix to get the build working.
Author: Mark Heily <mark@heily.com>

Index: libdispatch-0.1/configure.ac
===================================================================
--- libdispatch-0.1.orig/configure.ac	2010-07-01 23:32:36.000000000 -0400
+++ libdispatch-0.1/configure.ac	2010-07-01 23:34:15.000000000 -0400
@@ -174,6 +174,7 @@
 AM_CONDITIONAL(USE_MIG, $have_mach)
 
 AC_DEFINE(HAVE_PTHREAD_WORKQUEUES, 1,Define if pthread work queues are present)
+AC_DEFINE([__private_extern__], [__attribute__ ((visibility("hidden")))], "workaround")
 
 #
 # Find functions and declarations we care about.
