zephyr/cmake/modules/zephyr_module.cmake

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# SPDX-License-Identifier: Apache-2.0
include_guard(GLOBAL)
include(extensions)
include(python)
# This cmake file provides functionality to import CMakeLists.txt and Kconfig
# files for Zephyr modules into Zephyr build system.
#
# CMakeLists.txt and Kconfig files can reside directly in the Zephyr module or
# in a MODULE_EXT_ROOT.
# The `<module>/zephyr/module.yml` file specifies whether the build files are
# located in the Zephyr module or in a MODULE_EXT_ROOT.
#
# A list of Zephyr modules can be provided to the build system using:
# -DZEPHYR_MODULES=<module-path>[;<additional-module(s)-path>]
#
# It looks for: <module>/zephyr/module.yml or
# <module>/zephyr/CMakeLists.txt
# to load the Zephyr module into Zephyr build system.
# If west is available, it uses `west list` to obtain a list of projects to
# search for zephyr/module.yml
#
# If the module.yml file specifies that build files are located in a
# MODULE_EXT_ROOT then the variables:
# - `ZEPHYR_<MODULE_NAME>_CMAKE_DIR` is used for inclusion of the CMakeLists.txt
# - `ZEPHYR_<MODULE_NAME>_KCONFIG` is used for inclusion of the Kconfig
# files into the build system.
# Settings used by Zephyr module but where systems may define an alternative value.
set_ifndef(KCONFIG_BINARY_DIR ${CMAKE_BINARY_DIR}/Kconfig)
if(ZEPHYR_EXTRA_MODULES)
# ZEPHYR_EXTRA_MODULES has either been specified on the cmake CLI or is
# already in the CMakeCache.txt. This has precedence over the environment
# variable ZEPHYR_EXTRA_MODULES
elseif(DEFINED ENV{ZEPHYR_EXTRA_MODULES})
set(ZEPHYR_EXTRA_MODULES $ENV{ZEPHYR_EXTRA_MODULES})
endif()
if(ZEPHYR_MODULES)
set(ZEPHYR_MODULES_ARG "--modules" ${ZEPHYR_MODULES})
endif()
if(ZEPHYR_EXTRA_MODULES)
set(ZEPHYR_EXTRA_MODULES_ARG "--extra-modules" ${ZEPHYR_EXTRA_MODULES})
endif()
file(MAKE_DIRECTORY ${KCONFIG_BINARY_DIR})
set(KCONFIG_MODULES_FILE ${KCONFIG_BINARY_DIR}/Kconfig.modules)
set(ZEPHYR_SETTINGS_FILE ${CMAKE_BINARY_DIR}/zephyr_settings.txt)
if(WEST)
cmake: west: invoke west using same python as rest of build system When running CMake, then Python3 will be used. This is detected through FindPython3, with a preference for using the python or python3 in path, if any of those matches the required Python minimal version in Zephyr. It is also possible for users to specify a different Python, as example by using: `cmake -DPYTHON_PREFER=/usr/bin/python3.x` However, when running `west` as native command, then west will be invoked on linux based on the python defined in: `west` launcher, which could be: `#!/usr/bin/python3.y` Thus there could be mismatch in Pythons used for `west` and the python used for other scripts. This is even worse on windows, where a user might experience: ``` >.\opt\bin\Scripts\west.exe --version Traceback (most recent call last): File "C:\Python37\lib\runpy.py", line 193, in _run_module_as_main "__main__", mod_spec) ... File "C:\Python37\lib\socket.py", line 49, in <module> import _socket ImportError: Module use of python38.dll conflicts with this version of Python. ``` when testing out a newer Python, but the python in path is still a 3.7. By importing `west` into zephyr_module.py and by using, as example `python -c "from west.util import west_topdir; print(topdir())"` we ensure the same python is used in all python scripts. Also it allows the user to control the python to use for west. It also ensures that the west version being tested, is also the version being used, where old code would test the version imported by python, but using the west in path (which could be a different version) If the west version installed in the current Python, and west invocation is using a different Python interpreter, then an additional help text is printed, to easier assist users with debugging. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
2020-06-09 03:09:15 +08:00
set(WEST_ARG "--zephyr-base" ${ZEPHYR_BASE})
endif()
if(WEST OR ZEPHYR_MODULES)
# Zephyr module uses west, so only call it if west is installed or
# ZEPHYR_MODULES was provided as argument to CMake.
execute_process(
COMMAND
${PYTHON_EXECUTABLE} ${ZEPHYR_BASE}/scripts/zephyr_module.py
${WEST_ARG}
${ZEPHYR_MODULES_ARG}
${ZEPHYR_EXTRA_MODULES_ARG}
--kconfig-out ${KCONFIG_MODULES_FILE}
--cmake-out ${CMAKE_BINARY_DIR}/zephyr_modules.txt
--settings-out ${ZEPHYR_SETTINGS_FILE}
WORKING_DIRECTORY ${ZEPHYR_BASE}
ERROR_VARIABLE
zephyr_module_error_text
RESULT_VARIABLE
zephyr_module_return
)
if(${zephyr_module_return})
message(FATAL_ERROR "${zephyr_module_error_text}")
endif()
if(EXISTS ${ZEPHYR_SETTINGS_FILE})
file(STRINGS ${ZEPHYR_SETTINGS_FILE} ZEPHYR_SETTINGS_TXT ENCODING UTF-8 REGEX "^[^#]")
foreach(setting ${ZEPHYR_SETTINGS_TXT})
# Match <key>:<value> for each line of file, each corresponding to
# a setting. The use of quotes is required due to CMake not supporting
# lazy regexes (it supports greedy only).
string(REGEX REPLACE "\"(.*)\":\".*\"" "\\1" key ${setting})
string(REGEX REPLACE "\".*\":\"(.*)\"" "\\1" value ${setting})
list(APPEND ${key} ${value})
endforeach()
endif()
# Append ZEPHYR_BASE as a default ext root at lowest priority
list(APPEND MODULE_EXT_ROOT ${ZEPHYR_BASE})
if(EXISTS ${CMAKE_BINARY_DIR}/zephyr_modules.txt)
file(STRINGS ${CMAKE_BINARY_DIR}/zephyr_modules.txt ZEPHYR_MODULES_TXT
ENCODING UTF-8)
set(ZEPHYR_MODULE_NAMES)
foreach(module ${ZEPHYR_MODULES_TXT})
# Match "<name>":"<path>" for each line of file, each corresponding to
# one module. The use of quotes is required due to CMake not supporting
# lazy regexes (it supports greedy only).
string(REGEX REPLACE "\"(.*)\":\".*\":\".*\"" "\\1" module_name ${module})
list(APPEND ZEPHYR_MODULE_NAMES ${module_name})
endforeach()
endif()
# MODULE_EXT_ROOT is process order which means Zephyr module roots processed
# later wins. therefore we reverse the list before processing.
list(REVERSE MODULE_EXT_ROOT)
foreach(root ${MODULE_EXT_ROOT})
if(NOT EXISTS ${root})
message(FATAL_ERROR "No `modules.cmake` found in module root `${root}`.")
endif()
include(${root}/modules/modules.cmake)
endforeach()
if(DEFINED ZEPHYR_MODULES_TXT)
foreach(module ${ZEPHYR_MODULES_TXT})
# Match "<name>":"<path>" for each line of file, each corresponding to
# one Zephyr module. The use of quotes is required due to CMake not
# supporting lazy regexes (it supports greedy only).
string(CONFIGURE ${module} module)
string(REGEX REPLACE "\"(.*)\":\".*\":\".*\"" "\\1" module_name ${module})
string(REGEX REPLACE "\".*\":\"(.*)\":\".*\"" "\\1" module_path ${module})
string(REGEX REPLACE "\".*\":\".*\":\"(.*)\"" "\\1" cmake_path ${module})
zephyr_string(SANITIZE TOUPPER MODULE_NAME_UPPER ${module_name})
if(NOT ${MODULE_NAME_UPPER} STREQUAL CURRENT)
set(ZEPHYR_${MODULE_NAME_UPPER}_MODULE_DIR ${module_path})
set(ZEPHYR_${MODULE_NAME_UPPER}_CMAKE_DIR ${cmake_path})
else()
message(FATAL_ERROR "Found Zephyr module named: ${module_name}\n\
${MODULE_NAME_UPPER} is a restricted name for Zephyr modules as it is used for \
\${ZEPHYR_${MODULE_NAME_UPPER}_MODULE_DIR} CMake variable.")
endif()
endforeach()
endif()
else()
file(WRITE ${KCONFIG_MODULES_FILE}
"# No west and no Zephyr modules\n"
)
endif()