Re: [yocto] gpsd [version 3.23; master branch]: Is it possible to include / enable ubxtool?

["Peter Bergin" <peter@berginkonsult.se>]

Hi Matthias,

On 2021-09-01 17:11, Matthias Klein wrote:
> Hello Peter,
>
> I'm not sure it's that simple.
Sorry for my quick and a bit oversimplified response. I did my first 
build on an older version (3.20) where ubxtool was not built but present 
in the repo root. I see now that in 3.23 gpsd have changed concept and 
client/ubxtool.py.in is mangled through the build system to fill in some 
stuff and produce the ubxtool script.
> To me it looks like the recipe has bugs in python area, or my environment / build is causing problems.
> In the log.do_compile file I see messages which make me wonder:
>
> Checking whether python program exists...no
> Target Python doesn't exist - disabling Python.
> python = False (default True): build Python support and modules.
> GPS regression tests suppressed because socket_export or python is off.
>
> It looks to me that everything Python specific is disabled.
> Therefore I am missing on the target e.g. also the following file which should be generated:
>
> /usr/lib/python3.9/site-packages/gps/__init__.py
> /usr/lib/python3.9/site-packages/gps/gps.py
>
> Can anyone confirm this?

Confirmed!

The issue is that the package gpsd requires /usr/bin/python to be 
present as described in the documentation 
(https://gitlab.com/gpsd/gpsd/-/blob/master/build.adoc#user-content-quick-start). 
This is not the case in Yocto when using python3native bbclass. As 
described in the documentation it is possible to add a symlink called 
/usr/bin/python to the python interpreter in the sysroot. You can do 
this by adding:

     ln -sf python3-native/python3 ${STAGING_BINDIR_NATIVE}/python

When scons finds /usr/bin/python the python packages are also built in 
gpsd. Then you can continue to install and package ubxtool.

Best regards,
/Peter