113 lines
4.6 KiB
CMake
113 lines
4.6 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
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#
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# Copyright (c) 2021, Nordic Semiconductor ASA
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# Zephyr build system configuration files.
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#
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# Locate the Kconfig and DT config files that are to be used.
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# Also, locate the appropriate application config directory.
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#
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# Outcome:
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# The following variables will be defined when this CMake module completes:
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#
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# - CONF_FILE: List of Kconfig fragments
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# - DTC_OVERLAY_FILE: List of devicetree overlay files
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# - APPLICATION_CONFIG_DIR: Root folder for application configuration
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#
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# If any of the above variables are already set when this CMake module is
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# loaded, then no changes to the variable will happen.
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#
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# Variables set by this module and not mentioned above are considered internal
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# use only and may be removed, renamed, or re-purposed without prior notice.
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include_guard(GLOBAL)
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include(extensions)
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if(DEFINED APPLICATION_CONFIG_DIR)
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string(CONFIGURE ${APPLICATION_CONFIG_DIR} APPLICATION_CONFIG_DIR)
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if(NOT IS_ABSOLUTE ${APPLICATION_CONFIG_DIR})
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get_filename_component(APPLICATION_CONFIG_DIR ${APPLICATION_CONFIG_DIR} ABSOLUTE)
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endif()
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else()
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# Application config dir is not set, so we default to the application
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# source directory as configuration directory.
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set(APPLICATION_CONFIG_DIR ${APPLICATION_SOURCE_DIR})
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endif()
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if(DEFINED CONF_FILE)
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# This ensures that CACHE{CONF_FILE} will be set correctly to current scope
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# variable CONF_FILE. An already current scope variable will stay the same.
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set(CONF_FILE ${CONF_FILE})
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# CONF_FILE has either been specified on the cmake CLI or is already
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# in the CMakeCache.txt. This has precedence over the environment
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# variable CONF_FILE and the default prj.conf
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# In order to support a `prj_<name>.conf pattern for auto inclusion of board
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# overlays, then we must first ensure only a single conf file is provided.
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string(REPLACE " " ";" CONF_FILE_AS_LIST "${CONF_FILE}")
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list(LENGTH CONF_FILE_AS_LIST CONF_FILE_LENGTH)
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if(${CONF_FILE_LENGTH} EQUAL 1)
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# Need the file name to look for match.
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# Need path in order to check if it is absolute.
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get_filename_component(CONF_FILE_NAME ${CONF_FILE} NAME)
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if(${CONF_FILE_NAME} MATCHES "prj_(.*).conf")
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set(CONF_FILE_BUILD_TYPE ${CMAKE_MATCH_1})
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set(CONF_FILE_INCLUDE_FRAGMENTS true)
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endif()
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endif()
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elseif(CACHED_CONF_FILE)
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# Cached conf file is present.
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# That value has precedence over anything else than a new
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# `cmake -DCONF_FILE=<file>` invocation.
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set(CONF_FILE ${CACHED_CONF_FILE})
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elseif(DEFINED ENV{CONF_FILE})
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set(CONF_FILE $ENV{CONF_FILE})
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elseif(EXISTS ${APPLICATION_CONFIG_DIR}/prj_${BOARD}.conf)
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set(CONF_FILE ${APPLICATION_CONFIG_DIR}/prj_${BOARD}.conf)
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elseif(EXISTS ${APPLICATION_CONFIG_DIR}/prj.conf)
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set(CONF_FILE ${APPLICATION_CONFIG_DIR}/prj.conf)
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set(CONF_FILE_INCLUDE_FRAGMENTS true)
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endif()
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if(CONF_FILE_INCLUDE_FRAGMENTS)
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zephyr_file(CONF_FILES ${APPLICATION_CONFIG_DIR}/boards KCONF CONF_FILE BUILD ${CONF_FILE_BUILD_TYPE})
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endif()
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set(APPLICATION_CONFIG_DIR ${APPLICATION_CONFIG_DIR} CACHE INTERNAL "The application configuration folder")
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set(CACHED_CONF_FILE ${CONF_FILE} CACHE STRING "If desired, you can build the application using\
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the configuration settings specified in an alternate .conf file using this parameter. \
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These settings will override the settings in the application’s .config file or its default .conf file.\
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Multiple files may be listed, e.g. CONF_FILE=\"prj1.conf;prj2.conf\" \
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The CACHED_CONF_FILE is internal Zephyr variable used between CMake runs. \
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To change CONF_FILE, use the CONF_FILE variable.")
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unset(CONF_FILE CACHE)
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zephyr_file(CONF_FILES ${APPLICATION_CONFIG_DIR}/boards DTS APP_BOARD_DTS)
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# The CONF_FILE variable is now set to its final value.
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zephyr_boilerplate_watch(CONF_FILE)
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if(DTC_OVERLAY_FILE)
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# DTC_OVERLAY_FILE has either been specified on the cmake CLI or is already
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# in the CMakeCache.txt.
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elseif(APP_BOARD_DTS)
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set(DTC_OVERLAY_FILE ${APP_BOARD_DTS})
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elseif(EXISTS ${APPLICATION_CONFIG_DIR}/${BOARD}.overlay)
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set(DTC_OVERLAY_FILE ${APPLICATION_CONFIG_DIR}/${BOARD}.overlay)
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elseif(EXISTS ${APPLICATION_CONFIG_DIR}/app.overlay)
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set(DTC_OVERLAY_FILE ${APPLICATION_CONFIG_DIR}/app.overlay)
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endif()
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set(DTC_OVERLAY_FILE ${DTC_OVERLAY_FILE} CACHE STRING "If desired, you can \
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build the application using the DT configuration settings specified in an \
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alternate .overlay file using this parameter. These settings will override the \
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settings in the board's .dts file. Multiple files may be listed, e.g. \
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DTC_OVERLAY_FILE=\"dts1.overlay dts2.overlay\"")
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# The DTC_OVERLAY_FILE variable is now set to its final value.
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zephyr_boilerplate_watch(DTC_OVERLAY_FILE)
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