* Gettext 0.14.5 (or later).
+ * GNU M4 1.4.9 (or later).
+
+ * pkg-config 0.21 (or later).
+
* Gnulib, from CVS (see http://savannah.gnu.org/cvs/?group=gnulib).
Note that Gnulib does not require any form of installation:
simply checking it out into a directory is sufficient.