starting cmake support

project(linux C ASM)

cmake_minimum_required(VERSION 3.2)

find_package(BISON)

set(LIBV "6.6.0")

set(Upstream_VERSION 6.6.0)

if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64" OR "x86")

    set(linuxarch x86)

endif()

add_definitions(

    -DKERNELVERSION=Upstream_VERSION

    -DARCH=x86_64

)

if ("${CMAKE_C_COMPILER_ID}" MATCHES "Clang")

    add_definitions(-DLLVM=1)

    add_definitions(-DCC=clang)

    add_definitions(-D AS_IS_LLVM=TRUE)

    list(APPEND LINUXCMDOPTS LLVM=1)

    message(STATUS "Using compiler: ${CMAKE_C_COMPILER_ID}")

    add_compile_options(

        "-fintegrated-as"

        "-Werror=unknown-warning-option"

        "-Werror=ignored-optimization-argument"

        "-Werror=option-ignored"

        "-Werror=unused-command-line-argument"

    )

elseif("${CMAKE_C_COMPILER_ID}" MATCHES "GNU")

    message(STATUS "Using compiler: ${CMAKE_C_COMPILER_ID}")

    add_definitions(-DGCC)

    add_definitions(-DCC=gcc)

else()

    message(FATAL_ERROR "Your Compiler: ${CMAKE_C_COMPILER_ID} aren't supported")

endif()

list(APPEND LINUXCMDOPTS

    "ASM=${CMAKE_ASM_COMPILER}"

    "CC=${CMAKE_C_COMPILER}"

    "LD=${CMAKE_LINKER}"

    "srctree=${CMAKE_SOURCE_DIR}"

    "SRCARCH=${linuxarch}"

    "ARCH=${CMAKE_SYSTEM_PROCESSOR}"

)

include_directories(

    ${CMAKE_BINARY_DIR}

    ${CMAKE_SOURCE_DIR}

)

if(BISON_FOUND)

    find_program(bison

        flex

    )

    find_program(yacc

        yacc

    )

    set(menuconfigsrc

        scripts/kconfig/mconf.c

        scripts/kconfig/lxdialog/checklist.c

        scripts/kconfig/lxdialog/inputbox.c

        scripts/kconfig/lxdialog/menubox.c

        scripts/kconfig/lxdialog/textbox.c

        scripts/kconfig/lxdialog/util.c

        scripts/kconfig/lxdialog/yesno.c

        scripts/kconfig/confdata.c

        scripts/kconfig/expr.c

        scripts/kconfig/menu.c

        scripts/kconfig/preprocess.c

        scripts/kconfig/symbol.c

        scripts/kconfig/util.c

        scripts/kconfig/mconf.c

    )

    file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig)

    add_custom_command(

        OUTPUT

            ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig/lexer.c

            ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig/parser.tab.h

        COMMAND

            flex -o lexer.c -d "${CMAKE_SOURCE_DIR}/scripts/kconfig/lexer.l"

        COMMAND

            yacc -o parser.tab.h "${CMAKE_SOURCE_DIR}/scripts/kconfig/parser.y"

        WORKING_DIRECTORY

            ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig

        DEPENDS

            ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig

    )

    add_custom_target(menuconfig

        DEPENDS

            ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig/lexer.c

            ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig/parser.tab.h

        WORKING_DIRECTORY

            ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig

    )

    add_executable(menuexe EXCLUDE_FROM_ALL

        ${menuconfigsrc}

        #generated by command flex

        ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig/lexer.c

        #generated by command yacc

        ${CMAKE_CURRENT_BINARY_DIR}/scripts/kconfig/parser.tab.h

    )

    target_include_directories(menuexe

        PRIVATE

        ${CMAKE_SOURCE_DIR}/scripts/kconfig

    )

    target_compile_definitions(menuexe

        PRIVATE

        -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600

    )

    target_compile_definitions(menuexe

        PRIVATE

        -DYYDEBUG=1

    )

    target_link_libraries(menuexe

        ncursesw

        tinfo

    )

    add_dependencies(menuconfig menuexe)

    list(JOIN LINUXCMDOPTS ";" MENUCMD)

    add_custom_command(

        TARGET menuconfig POST_BUILD

        COMMAND ${CMAKE_COMMAND} -E copy

                ${CMAKE_CURRENT_SOURCE_DIR}/Kconfig

                ${CMAKE_CURRENT_BINARY_DIR}/Kconfig

    )

    add_custom_command(

        TARGET

            menuconfig

        COMMAND

           ${MENUCMD} $<TARGET_FILE:menuexe> "Kconfig"

        DEPENDS

            menuexe

        WORKING_DIRECTORY

            ${CMAKE_BINARY_DIR}

        USES_TERMINAL

    )

endif(BISON_FOUND)