(gettext.info)Installers

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14 The Installer’s and Distributor’s View
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   By default, packages fully using GNU ‘gettext’, internally, are
installed in such a way as to allow translation of messages.  At
_configuration_ time, those packages should automatically detect whether
the underlying host system already provides the GNU ‘gettext’ functions.
If not, the GNU ‘gettext’ library should be automatically prepared and
used.  Installers may use special options at configuration time for
changing this behavior.  The command ‘./configure
--with-included-gettext’ bypasses system ‘gettext’ to use the included
GNU ‘gettext’ instead, while ‘./configure --disable-nls’ produces
programs totally unable to translate messages.

   Internationalized packages have usually many ‘LL.po’ files.  Unless
translations are disabled, all those available are installed together
with the package.  However, the environment variable ‘LINGUAS’ may be
set, prior to configuration, to limit the installed set.  ‘LINGUAS’
should then contain a space separated list of two-letter codes, stating
which languages are allowed.