cmake_minimum_required(VERSION 3.10)

project(Flute_Hello)

enable_language(CXX)
enable_language(ASM)

# Device specific settings, goes to CFLAGS and LDFLAGS
set(CFLAGS_HARDWARE "-mabi=lp64 -march=rv64imac")

# Extra CFlags
set(CFLAGS_EXTRA "-Og")
set(LDFLAGS_EXTRA "-Wl,--print-memory-usage")

# Different linker scripts
set(LDSCRIPT_BRAM "${CMAKE_SOURCE_DIR}/startup/flute_bram.ld")

# Copy them from Makefile
set(C_SOURCES
    "src/main.c"
    "src/flute_system.c"
    "src/flute_it.c"
    "src/soc_peripherals.c"
    "src/syscalls.c"
    "src/system_init.c"
    "src/drivers/xilinx_gpio.c"
    "src/drivers/xilinx_timer.c"
    "src/drivers/xilinx_uartlite.c"
    "lib/printf/printf.c"
)

# Copy them from Makefile
set(ASM_SOURCES
    "startup/startup.S"
)

# Copy them from Makefile
add_definitions(
)

# Copy them from Makefile
include_directories(
    "include"
    "lib/printf"
)

# Final compiler flags
set(CMAKE_C_FLAGS "${CFLAGS_HARDWARE} ${CFLAGS_EXTRA} -Wall -fdata-sections -ffunction-sections")
set(CMAKE_CXX_FLAGS "${CFLAGS_HARDWARE} ${CFLAGS_EXTRA} -Wall -fdata-sections -ffunction-sections")
set(CMAKE_ASM_FLAGS "${CMAKE_C_FLAGS} -x assembler-with-cpp")
set(CMAKE_EXE_LINKER_FLAGS "${CFLAGS_HARDWARE} -Wl,--gc-sections -specs=nano.specs -nostartfiles -lc -lm -lnosys ${LDFLAGS_EXTRA}")

# Main targets are added here

# **** Internal BRAM ****

# Create ELF
add_executable("${CMAKE_PROJECT_NAME}_BRAM.elf" ${C_SOURCES} ${ASM_SOURCES})

target_link_options("${CMAKE_PROJECT_NAME}_BRAM.elf"
    PRIVATE "-T${LDSCRIPT_BRAM}"
    PRIVATE "-Wl,-Map=${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_PROJECT_NAME}_BRAM.map,--cref"
)

target_compile_options("${CMAKE_PROJECT_NAME}_BRAM.elf"
    PRIVATE "${FINAL_C_FLAGS}"
)

add_custom_command(OUTPUT "${CMAKE_PROJECT_NAME}_BRAM.hex"
    COMMAND ${CMAKE_OBJCOPY} "-O" "ihex" "${CMAKE_PROJECT_NAME}_BRAM.elf" "${CMAKE_PROJECT_NAME}_BRAM.hex"
    DEPENDS "${CMAKE_PROJECT_NAME}_BRAM.elf"
)
add_custom_target("${CMAKE_PROJECT_NAME}_BRAM_HEX"
    DEPENDS "${CMAKE_PROJECT_NAME}_BRAM.hex"
)

add_custom_command(OUTPUT "${CMAKE_PROJECT_NAME}_BRAM.bin"
    COMMAND ${CMAKE_OBJCOPY} "-O" "binary" "${CMAKE_PROJECT_NAME}_BRAM.elf" "${CMAKE_PROJECT_NAME}_BRAM.bin"
    DEPENDS "${CMAKE_PROJECT_NAME}_BRAM.elf"
)

add_custom_target("${CMAKE_PROJECT_NAME}_BRAM_BIN"
    DEPENDS "${CMAKE_PROJECT_NAME}_BRAM.bin"
)