$OpenBSD: patch-src_Makefile_in,v 1.12 2013/11/05 17:49:01 sthen Exp $
--- src/Makefile.in.orig	Thu Jun 13 21:49:12 2013
+++ src/Makefile.in	Thu Jun 13 21:50:01 2013
@@ -466,7 +466,7 @@ include_HEADERS = rrd.h rrd_format.h rrd_client.h
 rrdcgi_SOURCES = rrd_cgi.c
 rrdcgi_LDADD = librrd.la
 rrdupdate_SOURCES = rrdupdate.c
-rrdupdate_LDADD = librrdupd.la
+rrdupdate_LDADD = librrdupd.la -lpthread
 rrdtool_SOURCES = rrd_tool.c
 rrdtool_DEPENDENCIES = librrd.la
 rrdtool_LDADD = librrd.la
