--- a/common/autoconf/basics.m4	Sat Mar 25 01:43:39 2017 +0000
+++ b/common/autoconf/basics.m4	Thu Mar 30 21:23:07 2017 +0200
@@ -1098,6 +1098,7 @@
   BASIC_PATH_PROGS(HG, hg)
   BASIC_PATH_PROGS(STAT, stat)
   BASIC_PATH_PROGS(TIME, time)
+  BASIC_PATH_PROGS(FLOCK, flock)
   # Dtrace is usually found in /usr/sbin on Solaris, but that directory may not
   # be in the user path.
   BASIC_PATH_PROGS(DTRACE, dtrace, $PATH:/usr/sbin)