Compiling arduino code using CMake

arduino-toolchain.cmake

set(ARDUINO_IDE_PATH ARDUINO_IDE_NOT_FOUND CACHE FILEPATH "")
set(CMAKE_SYSTEM_NAME "Generic")
set(CMAKE_C_COMPILER "${ARDUINO_IDE_PATH}/hardware/tools/avr/bin/avr-gcc.exe")
set(CMAKE_CXX_COMPILER "${ARDUINO_IDE_PATH}/hardware/tools/avr/bin/avr-g++.exe")
include_directories("${ARDUINO_IDE_PATH}/hardware/arduino/avr/cores/arduino")
include_directories("${ARDUINO_IDE_PATH}/hardware/arduino/avr/variants/standard")
set(CMAKE_CXX_FLAGS "-MMD -mmcu=atmega328p -Wall -DF_CPU=16000000L -Os")
set(CMAKE_C_FLAGS "-MMD -mmcu=atmega328p -Wall -DF_CPU=16000000L -Os")
add_library(core STATIC
	"${ARDUINO_IDE_PATH}/hardware/arduino/avr/cores/arduino/main.cpp"
	"${ARDUINO_IDE_PATH}/hardware/arduino/avr/cores/arduino/wiring.c"
	"${ARDUINO_IDE_PATH}/hardware/arduino/avr/cores/arduino/wiring_digital.c"
	"${ARDUINO_IDE_PATH}/hardware/arduino/avr/cores/arduino/wiring_analog.c"
	"${ARDUINO_IDE_PATH}/hardware/arduino/avr/cores/arduino/hooks.c"
)

CMakeLists.txt

cmake_minimum_required(VERSION 3.12)
add_executable(myprogram myprogram.cpp)
target_link_libraries(myprogram core)

add_custom_command(
	TARGET myprogram POST_BUILD
	COMMAND ${CMAKE_OBJCOPY} -O ihex -R .eeprom myprogram myprogram.hex
	COMMENT "OBJCOPY myprogram"
	BYPRODUCTS myprogram.hex
)

myprogram.cpp

#include <Arduino.h>

void setup() {
}

void loop(){
}