The development sources are available through CVS at Savannah:
If you are getting the sources from CVS (or change configure.ac), you’ll need to have Automake, Autoconf and Gettext installed to (re)build. You’ll also need help2man. All of these programs are available from https://ftp.gnu.org/gnu/.
After getting the CVS sources, and installing the tools above, you can
./bootstrap to do a fresh build. After that first time,
make should suffice. See file INSTALL.
When modifying the sources, or making a distribution, more is needed, as follows:
gettextize -fin this hierarchy to update the po/ infrastructure. After doing so, rerun
gnulib-tool --importsince otherwise older files will have been imported. See Gnulib Manual, for more information.