Including the ev3dev-lang-cpp library

[MadsFox]

Do I only need the ev3dev.h and ev3dev.cpp files to use the functions in the ev3dev.h file or do those files have other dependencies. I see in you CMakeLists file, that you link to a directory.
link_directories(/usr/local/lib)
Would it be enough to just place the ev3dev.ccp and ev3dev.h files in that directory?
and add this to my CMakeLists file:
catkin_package(DEPENDS ev3dev) target_link_libraries(ev3dev_test_node_cpp ${catkin_LIBRARIES} ev3dev) add_executable(ev3dev_listener_node src/listener.cpp) target_link_libraries(ev3dev_listener_node ${catkin_LIBRARIES} ev3dev )

Trying to understand a lot of things at once, so just looking for a quick fix, that can confirm my intuition.

[moriarty]

Sorry I’m a away from home and don’t have Internet at my hotel- just on my cellphone, and at our test facility has strict Internet access policies so I won’t be able to respond until the weekend at the soonest.

I think if I remember correctly that those files don’t have many dependencies, but it would be best to check what they include in the cpp and h files. Or just try.

If you’re having trouble with ROS + Cmake + C++ + the EV3 all at once, then I highly recommend checking out the ROS tutorials and just the basic publisher/subscriber/action server/service, and then choosing one of the easier to simulate robots... which gets to the fundamentals of ROS, without the added difficulty of getting it running on an not-officially-supported robot with not officially supported processor, on a not officially supported Linux distribution... although- it’s awesome that you’re still trying! Because the EV3 is awesome and so is ROS, so it is worth it... but, I then didn’t upgrade mine for ages once I had it working it just worked...

[moriarty]

Linking to the original issue also:

moriarty/ros-ev3#16

On the bright side- there has been progress!

[moriarty]

Oh- just took a quick look at @ddemidov’s ev3dev-lang-cpp and I was wrong I’m not remembering those having too many dependencies. But, it is a cmake package, so you can put it into your Catkin package and direct/mod Catkin CMakelists to compile it as a dependency...

But isn’t the ev3dev-lang-cpp installed by default?

Sorry again, not helpful, answering a question with a question... but why isn’t ev3dev-lang-cpp in /usr/local/lib ?

[ddemidov]

ev3dev-lang-cpp is not included as a package with ev3dev.

[moriarty]

@MadsFox I saw you were able to get the other issue closed, were you able to get this project working?

If so, I'd be happy to accept a pull request, and as a bonus, if you make 4 pull requests this month to open source projects you can get a T-Shirt: https://hacktoberfest.digitalocean.com

[MadsFox]

I just added the ev3dev.cpp and ev3dev.h files to the src folder and edited the CMakelists file. I'll make a fork and send a pull request, but remember that i'm on a stretch image. Can't remember if your project also are?

[MadsFox]

...and i also edited the library files to match with the stretch image

[moriarty]

👍 I don't think I had the stretch image, I hadn't upgrade my EV3 for 2 years... Even if you update the readme instructions that would be helpful.