bitbake: doc: bitbake-user-manual-ref-variables: document BB_CURRENT_MC

Document the BB_CURRENT_MC variable, which holds the name of the current
multiconfig build a task is being run under.

(Bitbake rev: 178e09ea5ea39e60452077fa2ab90b90478ada6e)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/bitbake/doc/bitbake-user-manual/bitbake-user-manual-ref-variables.rst b/bitbake/doc/bitbake-user-manual/bitbake-user-manual-ref-variables.rst
index ad219b531f..858de63477 100644
--- a/bitbake/doc/bitbake-user-manual/bitbake-user-manual-ref-variables.rst
+++ b/bitbake/doc/bitbake-user-manual/bitbake-user-manual-ref-variables.rst
@@ -127,6 +127,11 @@ overview of their function and contents.
       Contains the name of the currently running task. The name does not
       include the ``do_`` prefix.
 
+   :term:`BB_CURRENT_MC`
+      Contains the name of the current multiconfig a task is being run under.
+      The name is taken from the multiconfig configuration file (a file
+      ``mc1.conf`` would make this variable equal to ``mc1``).
+
    :term:`BB_DEFAULT_TASK`
       The default task to use when none is specified (e.g. with the ``-c``
       command line option). The task name specified should not include the