+dnl We provide our own lib/glthread/lock.h, so let other Gnulib modules
+dnl know that we have it. This allows them to be compiled with adequate
+dnl locking support. See <http://bugs.gnu.org/14404>.
+AC_DEFINE([GNULIB_LOCK], [1],
+ [Define to allow Gnulib modules to use Guile's locks.])
+
+