dnl Check support for 64 bit file offsets.
AC_SYS_LARGEFILE
+dnl C functions which may be missing on older systems.
+AC_CHECK_FUNCS([inotify_init1 clock_gettime])
+
dnl Check for required packages using pkg-config.
-PKG_CHECK_MODULES([HOSTINFOD],[apr-1 >= 1.3])
+PKG_CHECK_MODULES([HOSTINFOD],[apr-1 >= 1.3 libvirt >= 0.2.1])
dnl Check for Perl and POD.
AC_CHECK_PROG([PERL],[perl],[perl],[no])