Problem when with determining link language. about arduino-cmake-ng HOT 3 CLOSED

cmake_minimum_required(VERSION 3.8)
project(my_blinky LANGUAGES C CXX ASM)

get_board_id(board_id nano atmega328old)

add_arduino_executable(${PROJECT_NAME} ${board_id} main.cpp)
upload_arduino_target(${PROJECT_NAME} "${board_id}" /dev/ttyUSB0)

#include <Arduino.h>

void setup() {
    pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
    digitalWrite(LED_BUILTIN, HIGH);
    delay(1000);                    
    digitalWrite(LED_BUILTIN, LOW);
    delay(1000);
}

$ tree -d -L 1
.
├── build
├── CMakeLists.txt
├── main.cpp
└── toolchain
    ├── Arduino-Toolchain.cmake
    └── Platform

$ cd build
$ rm -rf ./* && ARDUINO_SDK_PATH=/usr/share/arduino cmake -DCMAKE_TOOLCHAIN_FILE=toolchain/Arduino-Toolchain.cmake ..
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- The ASM compiler identification is GNU
-- Found assembler: /usr/share/arduino/hardware/tools/avr/bin/avr-gcc
-- Arduino SDK version 1.8.8: /usr/share/arduino
-- Determined Platform Header: /usr/share/arduino/hardware/arduino/avr/cores/arduino/Arduino.h
-- Arduino SDK version 1.8.8: /usr/share/arduino
-- Determined Platform Header: /usr/share/arduino/hardware/arduino/avr/cores/arduino/Arduino.h
-- Check for working C compiler: /usr/share/arduino/hardware/tools/avr/bin/avr-gcc
-- Check for working C compiler: /usr/share/arduino/hardware/tools/avr/bin/avr-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Arduino SDK version 1.8.8: /usr/share/arduino
-- Determined Platform Header: /usr/share/arduino/hardware/arduino/avr/cores/arduino/Arduino.h
-- Check for working CXX compiler: /usr/share/arduino/hardware/tools/avr/bin/avr-g++
-- Check for working CXX compiler: /usr/share/arduino/hardware/tools/avr/bin/avr-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/thor/Documents/from-scratch/software/webcam/arduino/encoder/build