cmake_minimum_required(VERSION 3.13)

# Can also be changed by upper CMakeLists.txt file
find_library(LIB_FSFW_NAME fsfw REQUIRED)

option(FSFW_HAL_ADD_LINUX "Add the Linux HAL to the sources. Required gpiod library" OFF)
option(FSFW_HAL_ADD_RASPBERRY_PI "Add Raspberry Pi specific code to the sources" OFF)

option(FSFW_HAL_ADD_STM32H7 "Add the STM32H7 HAL to the sources" OFF)

option(FSFW_HAL_WARNING_SHADOW_LOCAL_GCC "Enable -Wshadow=local warning in GCC" ON)

set(LIB_FSFW_HAL_NAME fsfw_hal)
set(LINUX_HAL_PATH_NAME linux)
set(STM32H7_PATH_NAME stm32h7)

add_library(${LIB_FSFW_HAL_NAME})

if(NOT LIB_FSFW_NAME)
    message(ERROR "LIB_FSFW_NAME needs to be set as a linkable target")
endif()

add_subdirectory(devicehandlers)
add_subdirectory(common)

if(FSFW_HAL_ADD_LINUX)
    add_subdirectory(${LINUX_HAL_PATH_NAME})
endif()

if(FSFW_HAL_ADD_STM32H7)
    add_subdirectory(${STM32H7_PATH_NAME})
endif()

target_link_libraries(${LIB_FSFW_HAL_NAME} PRIVATE
    ${LIB_FSFW_NAME}
)

foreach(INCLUDE_PATH ${FSFW_HAL_ADDITIONAL_INC_PATHS})
    if(IS_ABSOLUTE ${INCLUDE_PATH})
        set(CURR_ABS_INC_PATH "${INCLUDE_PATH}")
    else()
        get_filename_component(CURR_ABS_INC_PATH
            ${INCLUDE_PATH} REALPATH BASE_DIR ${CMAKE_SOURCE_DIR})
    endif()

    if(CMAKE_VERBOSE)
        message(STATUS "FSFW include path: ${CURR_ABS_INC_PATH}")
    endif()

    list(APPEND FSFW_HAL_ADD_INC_PATHS_ABS ${CURR_ABS_INC_PATH})
endforeach()

target_include_directories(${LIB_FSFW_HAL_NAME} PRIVATE
    ${CMAKE_CURRENT_SOURCE_DIR}
    ${FSFW_HAL_ADD_INC_PATHS_ABS}
)

target_compile_definitions(${LIB_FSFW_HAL_NAME} PRIVATE
    ${FSFW_HAL_DEFINES}
)

target_link_libraries(${LIB_FSFW_HAL_NAME} PRIVATE
    ${FSFW_HAL_LINK_LIBS}
)

if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
    if(NOT DEFINED FSFW_WARNING_FLAGS)
	   set(FSFW_WARNING_FLAGS
		  -Wall
		  -Wextra
		  -Wimplicit-fallthrough=1
		  -Wno-unused-parameter
        )
    endif()

	target_compile_options(${LIB_FSFW_NAME} PRIVATE
		"-ffunction-sections"
		"-fdata-sections"
	)

	target_link_options(${LIB_FSFW_NAME} PRIVATE
		"Wl,--gc-sections"
 	)

    if(FSFW_HAL_WARNING_SHADOW_LOCAL_GCC)
        list(APPEND WARNING_FLAGS "-Wshadow=local")
    endif()

endif()