Build: Refine Kconfig system and doc
Kconfig choice supports 'optional' key word to allow
the whole choice to be toggled off to select none of the
symbols.
It is necessary to abort the kconfig tool when platform
path doesn't exist.
Add usages of Kconfig tool in the documents.
Signed-off-by: Jianliang Shen <jianliang.shen@arm.com>
Change-Id: I6c38b0bde6a5a6d099d8ea606be5e9b359216efa
diff --git a/docs/getting_started/tfm_getting_started.rst b/docs/getting_started/tfm_getting_started.rst
index dad3dc6..bd2934d 100644
--- a/docs/getting_started/tfm_getting_started.rst
+++ b/docs/getting_started/tfm_getting_started.rst
@@ -448,6 +448,7 @@
cbor2 --> python
click --> python
imgtool --> python
+ kconfiglib --> python
@enduml
.. rubric:: Next steps