J.3.1 gettext

If AM_GNU_GETTEXT is seen in configure.ac, then Automake turns on support for GNU gettext, a message catalog system for internationalization (see Introduction in GNU gettext utilities).

The gettext support in Automake requires the addition of one or two subdirectories to the package: po and possibly also intl. The latter is needed if AM_GNU_GETTEXT is not invoked with the ‘external’ argument, or if AM_GNU_GETTEXT_INTL_SUBDIR is used. Automake ensures that these directories exist and are mentioned in SUBDIRS.