61453e4a58
Create a cmake/modules folder containing all Zephyr CMake modules. All Zephyr cmake files that are included from boilerplate are now converted into CMake modules which can be individually loaded. The Zephyr CMake package is updated to support loading of individual CMake modules using the COMPONENTS argument to `find_package(Zephyr)`. If the COMPONENTS argument is not specified, the default Zephyr build system will load. If COMPONENTS is specified then, only those components and the dependencies will be loaded. If a Zephyr CMake module depends on another CMake module which has not been loaded, it will automatically be loaded. This allows us to modularize and reuse individual parts of the Zephyr CMake build system in a more flexible way in future. Such usage could be: - Higher livel multi image build system - Invocation of individual components, for example dts processing by twister without loading all build code - Doc build - Unittesting With this new CMake package and CMake module scheme then direct sourcing of boilerplate.cmake has been deprecated. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
47 lines
1.5 KiB
CMake
47 lines
1.5 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
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#
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# Copyright (c) 2022, Nordic Semiconductor ASA
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# Configure ARCH settings based on board directory and arch root.
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#
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# This CMake module will set the following variables in the build system based
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# on board directory and arch root.
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#
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# If no implementation is available for the current arch an error will be raised.
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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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# - ARCH: Name of the arch in use.
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# - ARCH_DIR: Directory containing the arch implementation.
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# - ARCH_ROOT: ARCH_ROOT with ZEPHYR_BASE appended
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#
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# Variable dependencies:
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# - ARCH_ROOT: CMake list of arch roots containing arch implementations
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# - BOARD_DIR: CMake variable specifying the directory of the selected BOARD
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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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# 'ARCH_ROOT' is a prioritized list of directories where archs may be
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# found. It always includes ${ZEPHYR_BASE} at the lowest priority.
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list(APPEND ARCH_ROOT ${ZEPHYR_BASE})
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cmake_path(GET BOARD_DIR PARENT_PATH board_arch_dir)
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cmake_path(GET board_arch_dir FILENAME ARCH)
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foreach(root ${ARCH_ROOT})
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if(EXISTS ${root}/arch/${ARCH}/CMakeLists.txt)
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set(ARCH_DIR ${root}/arch)
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break()
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endif()
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endforeach()
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if(NOT ARCH_DIR)
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message(FATAL_ERROR "Could not find ARCH=${ARCH} for BOARD=${BOARD}, \
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please check your installation. ARCH roots searched: \n\
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${ARCH_ROOT}")
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endif()
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