Fix for Intel Macs.
diff --git a/configure.ac b/configure.ac
index ea10d35..c232c0a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -97,6 +97,7 @@ case $target in
;;
*-*-darwin*)
OPENCL_LIBS="-framework OpenCL"
+ PTHREAD_FLAGS=""
;;
esac