Link collectd-tg with -lpthread if available

otherwise linking fails with undefined refs to pthread_mutex_* functions

diff --git a/src/Makefile.am b/src/Makefile.am
index 5c6adfe..faec7b0 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -68,6 +68,9 @@ endif
 if BUILD_AIX
 collectd_tg_LDADD += -lm
 endif
+if BUILD_WITH_LIBPTHREAD
+collectd_tg_LDADD += -lpthread
+endif
 collectd_tg_LDADD += libcollectdclient/libcollectdclient.la
 collectd_tg_DEPENDENCIES = libcollectdclient/libcollectdclient.la