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https://github.com/zephyrproject-rtos/zephyr
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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>
67 lines
2.7 KiB
CMake
67 lines
2.7 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
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include_guard(GLOBAL)
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# Prevent CMake from testing the toolchain
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set(CMAKE_C_COMPILER_FORCED 1)
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set(CMAKE_CXX_COMPILER_FORCED 1)
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# No official documentation exists for the "Generic" value, except their wiki.
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#
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# https://gitlab.kitware.com/cmake/community/wikis/doc/cmake/CrossCompiling:
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# CMAKE_SYSTEM_NAME : this one is mandatory, it is the name of the target
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# system, i.e. the same as CMAKE_SYSTEM_NAME would have if CMake would run
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# on the target system. Typical examples are "Linux" and "Windows". This
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# variable is used for constructing the file names of the platform files
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# like Linux.cmake or Windows-gcc.cmake. If your target is an embedded
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# system without OS set CMAKE_SYSTEM_NAME to "Generic".
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set(CMAKE_SYSTEM_NAME Generic)
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# https://cmake.org/cmake/help/latest/variable/CMAKE_SYSTEM_PROCESSOR.html:
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# The name of the CPU CMake is building for.
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#
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# https://gitlab.kitware.com/cmake/community/wikis/doc/cmake/CrossCompiling:
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# CMAKE_SYSTEM_PROCESSOR : optional, processor (or hardware) of the
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# target system. This variable is not used very much except for one
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# purpose, it is used to load a
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# CMAKE_SYSTEM_NAME-compiler-CMAKE_SYSTEM_PROCESSOR.cmake file,
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# which can be used to modify settings like compiler flags etc. for
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# the target
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set(CMAKE_SYSTEM_PROCESSOR ${ARCH})
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# https://cmake.org/cmake/help/latest/variable/CMAKE_SYSTEM_VERSION.html:
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# When the CMAKE_SYSTEM_NAME variable is set explicitly to enable cross
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# compiling then the value of CMAKE_SYSTEM_VERSION must also be set
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# explicitly to specify the target system version.
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set(CMAKE_SYSTEM_VERSION ${PROJECT_VERSION})
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# We are not building dynamically loadable libraries
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set(BUILD_SHARED_LIBS OFF)
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# Custom targets for compiler and linker flags.
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add_custom_target(asm)
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add_custom_target(compiler)
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add_custom_target(compiler-cpp)
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add_custom_target(linker)
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if(NOT (COMPILER STREQUAL "host-gcc"))
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include(${TOOLCHAIN_ROOT}/cmake/toolchain/${ZEPHYR_TOOLCHAIN_VARIANT}/target.cmake)
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endif()
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# The 'generic' compiler and the 'target' compiler might be different,
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# so we unset the 'generic' one and thereby force the 'target' to
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# re-set it.
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unset(CMAKE_C_COMPILER)
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unset(CMAKE_C_COMPILER CACHE)
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# A toolchain consist of a compiler and a linker.
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# In Zephyr, toolchains require a port under cmake/toolchain/.
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# Each toolchain port must set COMPILER and LINKER.
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# E.g. toolchain/llvm may pick {clang, ld} or {clang, lld}.
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add_custom_target(bintools)
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include(${TOOLCHAIN_ROOT}/cmake/compiler/${COMPILER}/target.cmake OPTIONAL)
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include(${TOOLCHAIN_ROOT}/cmake/linker/${LINKER}/target.cmake OPTIONAL)
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include(${ZEPHYR_BASE}/cmake/bintools/bintools_template.cmake)
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include(${TOOLCHAIN_ROOT}/cmake/bintools/${BINTOOLS}/target.cmake OPTIONAL)
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