configure: hide errors when systemd is not present

diff --git a/configure.ac b/configure.ac
index f6a575e58caeccc583dbf210db96d5ce032c33d5..968c3c8418226a48e7353f423f179b33b1648196 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -219,7 +219,7 @@ AM_CONDITIONAL(HAVE_LAUNCHDDAEMONSDIR,
 
 # Systemd
 lldp_ARG_WITH([systemdsystemunitdir], [Directory for systemd service files],
-              [$($PKG_CONFIG --variable=systemdsystemunitdir systemd)])
+              [$($PKG_CONFIG --variable=systemdsystemunitdir systemd 2> /dev/null)])
 AC_SUBST([systemdsystemunitdir], [$with_systemdsystemunitdir])
 AM_CONDITIONAL(HAVE_SYSTEMDSYSTEMUNITDIR,
     [test -n "$with_systemdsystemunitdir" -a "x$with_systemdsystemunitdir" != xno ])