ref-manual/classes.rst: gettext: extend the documentation of the class

Mention the use of USE_NLS, INHIBIT_DEFAULT_DEPS and the cross-canadian
class.

Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
(From yocto-docs rev: b16f19e8004d571e7a6eadfa34983781ba6a7634)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
(cherry picked from commit d877e54f1c85cefc00dd674d60f2db81446bd95a)
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index d5d59cdc99..63c756e78e 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -913,6 +913,14 @@ software that uses the GNU ``gettext`` internationalization and localization
 system. All recipes building software that use ``gettext`` should inherit this
 class.
 
+This class will configure recipes to build translations *unless*:
+
+-  the :term:`USE_NLS` variable is set to ``no``, or
+
+-  the :term:`INHIBIT_DEFAULT_DEPS` variable is set and the recipe inheriting
+   the :ref:`ref-classes-gettext` class does not also inherit the
+   :ref:`ref-classes-cross-canadian` class.
+
 .. _ref-classes-github-releases:
 
 ``github-releases``