--- include/config.h.in.orig	2014-06-03 20:09:07 UTC
+++ include/config.h.in
@@ -39,6 +39,9 @@
 /* Define to build dynamic libraries with only API symbols exposed. */
 #undef GC_DLL
 
+/* Define to support BSDSUniX pthreads. */
+#undef GC_BSDSUNIX_THREADS
+
 /* Define to support FreeBSD pthreads. */
 #undef GC_FREEBSD_THREADS