[yocto] how to "compute" path to install module file

[Vincent Daanen]

Hi 
Thanks for your answer, it helps me to get module installation work.

But now I have another problem ... Stay tune the mail willarrive soon on the mailing list

> On 3/22/18 12:31 AM, Vincent Daanen wrote:
> > Hi,
> > 
> > I'm porting the makefile to build SocketCan for Ixxat on yocto. At 
> > this time I successfully build the module file.
>
> Have you checked out the CANopen drivers?
> https://github.com/ros-industrial/ros_canopen
> https://github.com/bmwcarit/meta-ros/tree/master/recipes-ros/ros-canopen
>
> There are already recipes for this if it happens to work for your part.
>
> Just figured I'd mention it :)
>
> For adding the Ixxat driver, this documentation might help:
> https://www.yoctoproject.org/docs/current/kernel-dev/kernel-dev.html#working-with-out-of-tree modules
>
> > 
> > Build fails with the following error:
> > 
> > nothing provides kernel-module-ixx-pci-4.12.14-yocto-standard needed 
> > by kernel-module-ixxat-candriver-1.0-r0.qemux86_64
>
> Do you have a recipe that provides ixx-pci? If so it needs to say:
>
> PROVIDES = "ixx-pci"
>
> https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#var-PROVIDES
>
> Also, you need to be sure that it is being built, so I would add that recipe into some RDEPENDS variable, > > for example:
>
> MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "ixx-pci"
>
> (in this case in your machine conf, assuming the package name is "ixx-pci")
>
> > 
> > I don't understand how yocto computes to module filename. It adds the 
> > kernel-version to the default filename...
>
> check out the "module_pattern" variables in:
> meta/classes/kernel-module-split.bbclass
>
> I believe this is done during packaging.
>
> Cheers,
> Stephano