sensor_gnss_relative_s type not defined

[Julian Oes]

Since #101 there is the type sensor_gnss_relative_s introduced which is nowhere to be found, unless you build within PX4.

@dagar.

[Daniel Agar]

I don't think it's any different than sensor_gps_position_s and satellite_info_s where you have to provide it. I personally don't like that structure.

[Beat Küng]

It's a trade-off to use the uorb struct directly.

[Beat Küng]

We can add it and allow it to be overridden via macro.

[Julian Oes]

Right, I realized that it's the way this API works, nevermind. I'll copy it in for now. Thanks!

[numan]

I have proposed a merge request for readme.md that notify users about the required definitions. It is probably not complete, (and maybe not upto standarts as I am not a native speaker) so please take a look

[Olivier Mbida]

If you get this error when building QgroundControl v4.2 then you need to :
git checkout 6fcf068

The error appears if you manually clone this repo PX4-GPSDrivers into the submodule in the GPS directory of QgroundControl repo.
In my case I got the error "sensor_gnss_relative_s type not defined"
and after I checkout 6fcf068 which is the specific commit for GPS drivers build with QgroundControl v4.2 the error when away.