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cmake: kconfig: Add APP_DIR to kconfig environment

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Add APP_DIR as a kconfig environment variable.

This is useful in cases where you want to set a config path relative to
the directory of the application.

An example of this is how many sysbuild.cmake files sets the source
directory like this:

ExternalZephyrProject_Add(
  APPLICATION remote
  SOURCE_DIR ${APP_DIR}/remote
  BOARD ${SB_CONFIG_REMOTE_BOARD}
)

The same however cannot be done in Kconfig.sysbuild:

config NETCORE_IMAGE_PATH
    default "${APP_DIR}/<image_path>" if NETCORE_ABC

Instead they must use ZEPHYR_MY_MODULE_MODULE_DIR, however not all
applications are part of a zephyr module.

Signed-off-by: Joakim Andersson <joerchan@gmail.com>
This commit is contained in:
Joakim Andersson 2025-07-04 09:57:07 +02:00 committed by Daniel DeGrasse
parent 112cd172c1
commit 12fdde6694
1 changed files with 4 additions and 0 deletions
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4
cmake/modules/kconfig.cmake
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@ -135,6 +135,9 @@ else()
set(_local_TOOLCHAIN_HAS_PICOLIBC n)
endif()
# APP_DIR: Path to the main image (sysbuild) or synonym for APPLICATION_SOURCE_DIR (non-sysbuild)
zephyr_get(APP_DIR VAR APP_DIR APPLICATION_SOURCE_DIR)
set(COMMON_KCONFIG_ENV_SETTINGS
PYTHON_EXECUTABLE=${PYTHON_EXECUTABLE}
srctree=${ZEPHYR_BASE}
@ -142,6 +145,7 @@ set(COMMON_KCONFIG_ENV_SETTINGS
APPVERSION=${APP_VERSION_STRING}
APP_VERSION_EXTENDED_STRING=${APP_VERSION_EXTENDED_STRING}
APP_VERSION_TWEAK_STRING=${APP_VERSION_TWEAK_STRING}
APP_DIR=${APP_DIR}
CONFIG_=${KCONFIG_NAMESPACE}_
KCONFIG_CONFIG=${DOTCONFIG}
KCONFIG_BOARD_DIR=${KCONFIG_BOARD_DIR}