76 lines
2.2 KiB
CMake
76 lines
2.2 KiB
CMake
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# project_name: The name of the project when calling `find_package`. Case sensitive.
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# `PACKAGE_FILEBASE` the name of the project in the config files, ie. ${PACKAGE_FILEBASE}-config.cmake.
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# `PACKAGE_PATH` the absolute path to the project's CMake package config files.
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function(cccl_add_subdir_helper project_name)
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set(options)
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set(
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oneValueArgs
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PACKAGE_PATH
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PACKAGE_FILEBASE
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REQUIRED_COMPONENTS
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OPTIONAL_COMPONENTS
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)
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set(multiValueArgs)
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cmake_parse_arguments(
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CCCL_SUBDIR
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"${options}"
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"${oneValueArgs}"
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"${multiValueArgs}"
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${ARGN}
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)
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if (NOT DEFINED CCCL_SUBDIR_PACKAGE_FILEBASE)
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string(TOLOWER "${project_name}" CCCL_SUBDIR_PACKAGE_FILEBASE)
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endif()
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if (NOT DEFINED CCCL_SUBDIR_PACKAGE_PATH)
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set(
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CCCL_SUBDIR_PACKAGE_PATH
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"${CCCL_SOURCE_DIR}/lib/cmake/${CCCL_SUBDIR_PACKAGE_FILEBASE}"
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)
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endif()
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set(
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package_prefix
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"${CCCL_SUBDIR_PACKAGE_PATH}/${CCCL_SUBDIR_PACKAGE_FILEBASE}"
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)
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set(CMAKE_FIND_PACKAGE_NAME ${project_name})
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set(${CMAKE_FIND_PACKAGE_NAME}_FIND_COMPONENTS)
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if (DEFINED CCCL_SUBDIR_REQUIRED_COMPONENTS)
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list(
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APPEND ${CMAKE_FIND_PACKAGE_NAME}_FIND_COMPONENTS
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${CCCL_SUBDIR_REQUIRED_COMPONENTS}
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)
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foreach (component IN LISTS CCCL_SUBDIR_REQUIRED_COMPONENTS)
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set(${CMAKE_FIND_PACKAGE_NAME}_FIND_REQUIRED_${component} TRUE)
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endforeach()
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endif()
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if (DEFINED CCCL_SUBDIR_OPTIONAL_COMPONENTS)
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list(
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APPEND ${CMAKE_FIND_PACKAGE_NAME}_FIND_COMPONENTS
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${CCCL_SUBDIR_OPTIONAL_COMPONENTS}
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)
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endif()
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# This effectively does a `find_package` actually going through the find_package
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# machinery. Using `find_package` works for the first configure, but creates
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# inconsistencies during subsequent configurations when using CPM..
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#
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# More details are in the discussion at
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# https://github.com/NVIDIA/libcudacxx/pull/242#discussion_r794003857
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include("${package_prefix}-config-version.cmake")
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include("${package_prefix}-config.cmake")
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if (${project_name}_FOUND)
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# Set the dir var so that later `find_package` calls work as expected.
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set(
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${project_name}_DIR
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"${CCCL_SUBDIR_PACKAGE_PATH}"
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CACHE PATH
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"Path to ${project_name} package"
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)
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endif()
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endfunction()
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