ref-manual: document UBOOT_MAKE_OPTS

This variable was added by commit 3338330e0c46 ("u-boot: Add specifying
make options as part the config looping") in OE-Core. Document how to
use the option in UBOOT_CONFIG.

Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
(From yocto-docs rev: 0fc14dca55d3760491cc40ac8c136c9dbdd23dbb)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 12 insertions, 2 deletions

diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index 2a69d2d59b..a56a2f7198 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -3241,8 +3241,8 @@ There are two ways to configure the recipe for your machine:
 -  Using :term:`UBOOT_CONFIG` variable. For example::
 
       UBOOT_CONFIG ??= "foo bar"
-      UBOOT_CONFIG[foo] = "config,images,binary"
-      UBOOT_CONFIG[bar] = "config2,images2,binary2"
+      UBOOT_CONFIG[foo] = "config,images,binary,makeopts"
+      UBOOT_CONFIG[bar] = "config2,images2,binary2,makeopts2"
 
    In this example, all possible configurations are selected (``foo`` and
    ``bar``), but it is also possible to build only ``foo`` or ``bar`` by
@@ -3280,6 +3280,10 @@ There are two ways to configure the recipe for your machine:
 
       This option defaults to :term:`UBOOT_BINARY` if unset.
 
+   -  ``makeopts``: the additional options passed to ``make`` when configuring
+      and compiling U-Boot for this configuration entry. The options in this
+      entry are added before the options in :term:`UBOOT_MAKE_OPTS`.
+
 -  Or, using the :term:`UBOOT_MACHINE` variable (and its companion variable
    :term:`UBOOT_BINARY`). For example::
 
diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index e80c5a6e92..a80ef364ed 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -10906,6 +10906,12 @@ system and gives an overview of their function and contents.
       Please see the "Selection of Processor Architecture and Board Type"
       section in the U-Boot README for valid values for this variable.
 
+   :term:`UBOOT_MAKE_OPTS`
+      The :term:`UBOOT_MAKE_OPTS` variable can be used to pass extra options to
+      ``make`` when U-Boot is configured and compiled.
+
+      See the :ref:`ref-classes-uboot-config` class for more information.
+
    :term:`UBOOT_MAKE_TARGET`
       Specifies the target called in the ``Makefile``. The default target
       is "all".