dnl Functions used for noise-gathering.
AC_CHECK_FUNCS([setgroups])
AC_CHECK_HEADERS([linux/random.h])
+mdw_ORIG_LIBS=$LIBS LIBS=$CATACOMB_LIBS
+AC_SEARCH_LIBS([clock_gettime], [rt])
+CATACOMB_LIBS=$LIBS LIBS=$mdw_ORIG_LIBS
+if test "$ac_cv_search_clock_gettime" != no; then
+ AC_DEFINE([HAVE_CLOCK_GETTIME], [1],
+ [Define if you have the \`clock_gettime' function.])
+fi
AC_CHECK_FUNCS([getentropy])
AC_CACHE_CHECK([whether the freewheel noise generator will work],
[catacomb_cv_freewheel],