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- # Uniquely identify the toolchain wrt. it's capabilities.
- #
- # What we are looking for, is a signature definition that is defined
- # like this:
- # * The MD5 sum of the compiler itself. A MD5 checksum is taken of the content
- # after symlinks are resolved. This ensure that if the content changes, then
- # the MD5 will also change (as example toolchain upgrade in same folder)
- # * The CMAKE_C_COMPILER itself. This may be a symlink, but it ensures that
- # multiple symlinks pointing to same executable will generate different
- # signatures, as example: clang, gcc, arm-zephyr-eabi-gcc, links pointing to
- # ccache will generate unique signatures
- # * CMAKE_C_COMPILER_ID is taking the CMake compiler id for extra signature.
- # * CMAKE_C_COMPILER_VERSION will ensure that even when using the previous
- # methods, where an upgraded compiler could have same signature due to ccache
- # usage and symbolic links, then the upgraded compiler will have new version
- # and thus generate a new signature.
- #
- # Toolchains with the same signature will always support the same set of flags.
- #
- file(MD5 ${CMAKE_C_COMPILER} CMAKE_C_COMPILER_MD5_SUM)
- set(TOOLCHAIN_SIGNATURE ${CMAKE_C_COMPILER_MD5_SUM})
- # Extend the CMAKE_C_COMPILER_MD5_SUM with the compiler signature.
- string(MD5 COMPILER_SIGNATURE ${CMAKE_C_COMPILER}_${CMAKE_C_COMPILER_ID}_${CMAKE_C_COMPILER_VERSION})
- set(TOOLCHAIN_SIGNATURE ${TOOLCHAIN_SIGNATURE}_${COMPILER_SIGNATURE})
- # Loading of templates are strictly not needed as they does not set any
- # properties.
- # They purely provides an overview as well as a starting point for supporting
- # a new toolchain.
- include(${CMAKE_CURRENT_LIST_DIR}/compiler/compiler_flags_template.cmake)
- include(${CMAKE_CURRENT_LIST_DIR}/linker/linker_flags_template.cmake)
- # Configure the toolchain flags based on what toolchain technology is used
- # (gcc, host-gcc etc.)
- include(${TOOLCHAIN_ROOT}/cmake/compiler/${COMPILER}/compiler_flags.cmake OPTIONAL)
- include(${TOOLCHAIN_ROOT}/cmake/linker/${LINKER}/linker_flags.cmake OPTIONAL)
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