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eng: Document use of BSP family for defaults

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Update #4468.
This commit is contained in:
Sebastian Huber 2021-08-18 11:27:56 +02:00
parent bd4dedc192
commit d223ec99ae
2 changed files with 8 additions and 4 deletions
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4
eng/build-system.rst
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@ -355,8 +355,8 @@ Add a Base BSP to a BSP Family
items ``spec:/build/bsps/arch/family/bsprst``,
``spec:/build/bsps/arch/family/bspuvw``, and
``spec:/build/bsps/arch/family/bspxyz`` just define the name of the base
BSP and set a link to the group item. The base BSP names can be used for
example in the ``default-by-variant`` attribute of
BSP and set a link to the group item. The base BSP and BSP family names
can be used for example in the ``default-by-variant`` attribute of
:ref:`SpecTypeBuildOptionItemType` items. The items linked by the BSP
items are shown using relative UIDs.

8
eng/req/items.rst
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@ -719,8 +719,11 @@ default
default-by-variant
The attribute value shall be a list. Each list element shall be a
:ref:`SpecTypeBuildOptionDefaultByVariant`. The list is processed from top
to bottom. If a matching variant is found, then the processing stops.
:ref:`SpecTypeBuildOptionDefaultByVariant`. The list is checked two times
and processed from top to bottom. Firstly, the base BSP name is used to
match with a variant. Secondly, the BSP family name prefixed by ``bsps/``
is used to match with a variant. If a matching variant is found, then the
processing stops.
description
The attribute value shall be an optional string. It shall be the
@ -750,6 +753,7 @@ Please have a look at the following example:
default-by-variant:
- value: 9600
variants:
- bsps/powerpc/motorola_powerpc
- m68k/m5484FireEngine
- powerpc/hsc_cm01
- value: 19200