ref-manual/classes,variables: document the CCACHE_DISABLE variable

Can be used in recipes that want to explicitly skip Ccache support when
the ccache class is enabled.

Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
(From yocto-docs rev: cc6e7a2d80ca03ee49a94af2eda74e83b1a33552)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
(cherry picked from commit b1b4adc8d4d9d23ff6fd91bca632bb0f5277e72b)
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 69d75af558..ec40b3e6fc 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -1097,6 +1097,11 @@ system and gives an overview of their function and contents.
    :term:`CC`
       The minimal command and arguments used to run the C compiler.
 
+   :term:`CCACHE_DISABLE`
+      When inheriting the :ref:`ref-classes-ccache` class, the
+      :term:`CCACHE_DISABLE` variable can be set to "1" in a recipe to disable
+      `Ccache` support. This is useful when the recipe is known to not support it.
+
    :term:`CFLAGS`
       Specifies the flags to pass to the C compiler. This variable is
       exported to an environment variable and thus made visible to the