diff -Nrup a/configure b/configure
--- a/configure	2016-06-10 19:03:21.000000000 -0400
+++ b/configure	2017-06-08 22:26:52.452908851 -0400
@@ -9026,7 +9026,7 @@ return clock_gettime ();
   return 0;
 }
 _ACEOF
-for ac_lib in '' rt posix4; do
+for ac_lib in '' posix4; do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else