configure.ac: check for -lrt

Needed when pgqd is built against libevent (--with-libevent)

diff --git a/configure.ac b/configure.ac
index 2b0698d96a905f67c3b91df191989b956d237508..fbc36fe7add1cc4a90ba69cfa24cb8c5445c5ffa 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -145,6 +145,7 @@ dnl Postres headers on Solaris define incompat unsetenv without that
 AC_CHECK_FUNCS(unsetenv)
 
 dnl Optional use of libevent
+AC_SEARCH_LIBS(clock_gettime, rt)
 AC_USUAL_LIBEVENT_OPT
 
 dnl Needed on SmartOS (Solaris)