diff options
Diffstat (limited to 'cmake/Kernel.cmake')
| -rw-r--r-- | cmake/Kernel.cmake | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/cmake/Kernel.cmake b/cmake/Kernel.cmake new file mode 100644 index 0000000..9ecbbba --- /dev/null +++ b/cmake/Kernel.cmake @@ -0,0 +1,58 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# CMake macros to build and install Linux kernel modules +# Copyright (C) 2020 Manuel Bentele <development@manuel-bentele.de> +# + +# macro to define kernel module targets +macro(add_kernel_module MODULE_NAME KERNEL_BUILD_DIR KERNEL_INSTALL_DIR MODULE_MACRO MODULE_SOURCE_FILES MODULE_HEADER_FILES BUILD_SOURCE_FILE) + # create directory for kernel module + file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}) + # copy build source file + get_filename_component(BUILD_SOURCE_FILENAME ${BUILD_SOURCE_FILE} NAME) + add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}/${BUILD_SOURCE_FILENAME} + COMMAND ${CMAKE_COMMAND} -E copy_if_different ${BUILD_SOURCE_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME} + DEPENDS ${BUILD_SOURCE_FILE}) + set(BUILD_SOURCE_FILE_PREPARED ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}/${BUILD_SOURCE_FILENAME}) + # copy source files + foreach(MODULE_SOURCE_FILE ${MODULE_SOURCE_FILES}) + get_filename_component(MODULE_SOURCE_FILENAME ${MODULE_SOURCE_FILE} NAME) + add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}/${MODULE_SOURCE_FILENAME} + COMMAND ${CMAKE_COMMAND} -E copy_if_different ${MODULE_SOURCE_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME} + DEPENDS ${MODULE_SOURCE_FILE}) + set(MODULE_SOURCE_FILES_PREPARED ${MODULE_SOURCE_FILES_PREPARED} + ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}/${MODULE_SOURCE_FILENAME}) + endforeach() + # copy header files + foreach(MODULE_HEADER_FILE ${MODULE_HEADER_FILES}) + get_filename_component(MODULE_HEADER_FILENAME ${MODULE_HEADER_FILE} NAME) + add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}/${MODULE_HEADER_FILENAME} + COMMAND ${CMAKE_COMMAND} -E copy_if_different ${MODULE_HEADER_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME} + DEPENDS ${MODULE_HEADER_FILE}) + set(MODULE_HEADER_FILES_PREPARED ${MODULE_HEADER_FILES_PREPARED} + ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}/${MODULE_HEADER_FILENAME}) + endforeach() + # check if module depends on another module + if(NOT ${ARGV7} STREQUAL "") + set(MODULE_EXTRA_SYMBOLS ${CMAKE_CURRENT_BINARY_DIR}/${ARGV7}/Module.symvers) + endif() + # define build command + set(MODULE_BUILD_COMMAND ${CMAKE_MAKE_PROGRAM} ${MODULE_MACRO} + -C ${KERNEL_BUILD_DIR} + M=${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME} modules + EXTRA_CFLAGS=${KERNEL_C_FLAGS} + KBUILD_MODPOST_WARN=1 + KBUILD_EXTRA_SYMBOLS=${MODULE_EXTRA_SYMBOLS}) + add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}/${MODULE_NAME}.ko + COMMAND ${MODULE_BUILD_COMMAND} + WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME} + COMMENT "Build kernel module ${MODULE_NAME}" + DEPENDS ${BUILD_SOURCE_FILE_PREPARED} ${MODULE_HEADER_FILES_PREPARED} ${MODULE_SOURCE_FILES_PREPARED} + VERBATIM) + add_custom_target(${MODULE_NAME} ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}/${MODULE_NAME}.ko ${ARGV7}) + # install kernel module + install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${MODULE_NAME}/${MODULE_NAME}.ko + DESTINATION ${KERNEL_INSTALL_DIR} + PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ + COMPONENT kernel) +endmacro(add_kernel_module) |