cmake_minimum_required(VERSION 3.13)

option(STM_HAL_GENERATE_SECTIONS
    "Generate function and data sections. Required to remove unused code" ON
)

if(STM_HAL_GENERATE_SECTIONS)
    option(STM_HAL_REMOVE_UNUSED_CODE "Remove unused code" ON)
endif()


set(LIB_STM_HAL_NAME stm_hal)
add_library(${LIB_STM_HAL_NAME})

target_sources(${LIB_STM_HAL_NAME} PRIVATE
	Src/stm32h7xx_hal_gpio.c
	Src/stm32h7xx_hal.c
	Src/stm32h7xx_hal_cortex.c 
	Src/stm32h7xx_hal_tim.c 
	Src/stm32h7xx_hal_tim_ex.c 
	Src/stm32h7xx_hal_rcc.c 
	Src/stm32h7xx_hal_rcc_ex.c 
	Src/stm32h7xx_hal_flash.c 
	Src/stm32h7xx_hal_flash_ex.c 
	Src/stm32h7xx_hal_hsem.c 
	Src/stm32h7xx_hal_dma.c 
	Src/stm32h7xx_hal_dma_ex.c 
	Src/stm32h7xx_hal_mdma.c 
	Src/stm32h7xx_hal_pwr.c 
	Src/stm32h7xx_hal_pwr_ex.c 
	Src/stm32h7xx_hal_i2c.c 
	Src/stm32h7xx_hal_spi.c
	Src/stm32h7xx_hal_i2c_ex.c 
	Src/stm32h7xx_hal_uart.c 
	Src/stm32h7xx_hal_uart_ex.c 
	Src/stm32h7xx_hal_eth.c 
	Src/stm32h7xx_hal_adc.c 
)

if(NOT STM_HAL_CONFIG_PATH)
	message(WARNING 
		"STM HAL library  configuration include path" 
		"STM_HAL_CONFIG_PATH not set!"
	)
endif()

if(IS_ABSOLUTE ${STM_HAL_CONFIG_PATH})
	set(STM_HAL_CONFIG_PATH_ABS "${STM_HAL_CONFIG_PATH}")
else()
	get_filename_component(STM_HAL_CONFIG_PATH_ABS
		${STM_HAL_CONFIG_PATH} REALPATH BASE_DIR ${CMAKE_SOURCE_DIR}
	)
endif()

if(NOT CMSIS_INC_PATH)
	message(WARNING "No include path for CMSIS includes specified!")
endif()

if(IS_ABSOLUTE ${CMSIS_INC_PATH})
	set(CMSIS_INC_PATH_ABS "${STM_HAL_CONFIG_PATH}")
else()
	get_filename_component(CMSIS_INC_PATH_ABS
		${CMSIS_INC_PATH} REALPATH BASE_DIR ${CMAKE_SOURCE_DIR}
	)
endif()

if(CMAKE_VERBOSE)
	message(STATUS "STM HAL defines: ${STM_HAL_DEFINES}")
endif()

target_compile_definitions(${LIB_STM_HAL_NAME} PRIVATE
	${STM_HAL_DEFINES}
)

target_include_directories(${LIB_STM_HAL_NAME} PRIVATE
	"${STM_HAL_CONFIG_PATH_ABS}"
	"${CMSIS_INC_PATH_ABS}"
	Inc
)

target_include_directories(${LIB_STM_HAL_NAME} INTERFACE
	"${STM_HAL_CONFIG_PATH_ABS}"
	"${CMSIS_INC_PATH_ABS}"
	Inc
)

target_compile_definitions(${LIB_STM_HAL_NAME} INTERFACE
	${STM_HAL_DEFINES}
)

if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
    if(STM_HAL_GENERATE_SECTIONS)
        target_compile_options(${LIB_STM_HAL_NAME} PRIVATE
            "-ffunction-sections"
            "-fdata-sections"
        )
    endif()

    if(STM_HAL_REMOVE_UNUSED_CODE)
        target_link_options(${LIB_STM_HAL_NAME} PRIVATE
            "Wl,--gc-sections"
        )
    endif()
endif()