Sketch (ino) support broken

[galou]

Hi,

first of all, thanks for developing this project and trying and avoiding the Arduino "IDE".

I'm trying to compile the Sketch Blink.ino:

cd /tmp
mkdir act && cd act
cp -r /opt/arduino-1.8.13/examples/01.Basics/Blink/ .
cd Blink
cat <<EOF > CMakeLists.txt
cmake_minimum_required(VERSION 3.10)
project(Blink CXX)
add_executable(blink Blink.ino)
target_link_arduino_libraries(blink PRIVATE core)
EOF
cd ..
mkdir build && cd build
cmake -DCMAKE_TOOLCHAIN_FILE=$HOME/04-sources/arduino-cmake-toolchain/Arduino-toolchain.cmake -DARDUINO_BOARD="Arduino Uno [avr.uno]" ../Blink
make

Compilation suceeds but linking fails:

/tmp/ccJpGAAX.ltrans0.ltrans.o: In function `main':
/opt/arduino-1.8.13/hardware/arduino/avr/cores/arduino/main.cpp:43: undefined reference to `setup'
/opt/arduino-1.8.13/hardware/arduino/avr/cores/arduino/main.cpp:46: undefined reference to `loop'
collect2: error: ld returned 1 exit status

For easier reference, the CMakeLists.txt file is

cmake_minimum_required(VERSION 3.10)
project(Blink CXX)
add_executable(blink Blink.ino)
target_link_arduino_libraries(blink PRIVATE core)

In the case that I'm doing something wrong and that other users might do the same, it would be good to document how to compile sketches.

The workaround to rename Blink.ino to Blink.cpp may work here, I didn't try it, but I have another project, where Arduino-Cmake-Toolchain doesn't find the Arduino library when using the cpp extension.

Arduino-Cmake-Toolchain e745a9bed3c3fb83 (2020-06-16), Arduino 1.8.13.

[raphael-bmec-co]

Have you included the following in your file with setup and loop?

#include <Arduino.h>

[galou]

I hadn't but adding the line doesn't help.

[a9183756-gh]

Support for .ino files is not there at all yet in the toolchain. A simple workaround may be to rename .ino to .cpp file and including Arduino.h (#include "Arduino.h")

Please report the issue "Arduino-Cmake-Toolchain not finding the Arduino library when using the cpp extension", if that is what is blocking you from renaming .ino to .cpp. May be you can try the branch release-1.1-dev before reporting the issue (git checkout release-1.1-dev).

[galou]

I'm sorry, I didn't see that the support for *.ino files was unticked, I just saw that it was in the list of features.

Anyway, the Blink sketch works perfectly when renaming Blink.ino to Blink.cpp.

I wanted to use Arduino-Cmake-Toolchain for my project, though but didn't succeed. The first step I did is to install support for the OpenCR board in Arduino (adding https://raw.githubusercontent.com/ROBOTIS-GIT/OpenCR/master/arduino/opencr_release/package_opencr_index.json to the list of URLs for the Board Manager, according to the doc and to install the Dynamixel2Arduino library. Then I did

#!/bin/bash
mkdir /tmp/turtlebot3_ros2 && cd /tmp/turtlebot3_ros2
cp -r ~/.arduino15/packages/OpenCR/hardware/OpenCR/1.4.17/libraries/turtlebot3_ros2/examples/turtlebot3_burger .
echo << EOF > turtlebot3_burger/CMakeLists.txt
cmake_minimum_required(VERSION 3.10)
project(turtlebot3_burger CXX)
add_executable(turtlebot3_burger turtlebot3_burger.cpp)
target_link_arduino_libraries(turtlebot3_burger PRIVATE core "TurtleBot3 ROS2")
EOF
mv turtlebot3_burger/turtlebot3_burger.ino turtlebot3_burger/turtlebot3_burger.cpp
mkdir build && cd build
cmake -DCMAKE_TOOLCHAIN_FILE=$HOME/04-sources/arduino-cmake-toolchain/Arduino-toolchain.cmake -DARDUINO_BOARD="OpenCR.OpenCR" ../turtlebot3_burger
make

With the current HEAD and -DARDUINO_BOARD="OpenCR Board [OpenCR.OpenCR]", cmake fails:

CMake Error at /home/gael/04-sources/arduino-cmake-toolchain/Arduino/System/BoardBuildTargets.cmake:472 (message):
  Arduino library TurtleBot3 ROS2 could not be found in

and with release-1.1-dev and -DARDUINO_BOARD="OpenCR.OpenCR", cmake succeeds but make fails:

/tmp/examples/turtlebot3_burger/turtlebot3_burger.cpp:17:29: fatal error: TurtleBot3_ROS2.h: No such file or directory

[fnevgeny]

BTW, I added the following lines to force cmake working with ino files:

# Force the .ino file to be treated as C++
set_source_files_properties(${PROJECT_SOURCE_DIR}/my_project.ino
    PROPERTIES LANGUAGE CXX
)
set_source_files_properties(${PROJECT_SOURCE_DIR}/my_project.ino
    PROPERTIES COMPILE_FLAGS "-x c++"
)