$NetBSD: patch-OpenCL.pc.in,v 1.1 2021/07/09 18:30:29 nia Exp $

Link with libpthread in order to unbreak pocl on NetBSD.

--- OpenCL.pc.in.orig	2021-03-30 16:10:38.000000000 +0000
+++ OpenCL.pc.in
@@ -6,5 +6,5 @@ includedir=@includedir@
 Name: OpenCL
 Description: Open Computing Language generic Installable Client Driver Loader
 Version: @OPENCL_VERSION@
-Libs: -L${libdir} -lOpenCL
+Libs: -L${libdir} -lOpenCL -pthread
 Cflags: -I${includedir}