[yocto] Building a out of tree kernel module on target system

[Bruce Ashfield]

On Fri, Oct 4, 2019 at 11:40 AM Shravan Singh <shravan at bluesparq.com> wrote:
>
> Hello,
>
> I am trying to build an out of tree service module on a yocto raspberry pi image(target system).
> I am using yocto version warrior
> and my machine is Raspberrypi-cm3
> Kernel version is 4.19.58
>
> I was able to get the build directory by including
>
> IMAGE_INSTALL_append = " kernel-modules kernel-dev kernel-devsrc"
> After that, I saw a build directory on raspberrypi-image
>
> Now I am trying to compile my source file with the command
>
> make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- KSRC="/lib/modules/4.19.58/source" -C /lib/modules/$(shell uname -r)/build M=/home/root/tsDriver modules
>
> After that I get an error saying asm/bitsperlong.h: no such file or directory
>
> Am I missing something in my make command?

You need to rebuild/regenerate some file on target (they can't be packaged).
So have you gone to /usr/src/kernel and done a "make scripts prepare" ?

Bruce

>
>
> Regards,
> Shravan Singh
> (239) 243-0838
>
> Blue Sparq, Inc.
> 928 NE 24th Lane unit 4 and 5.
> Cape Coral, FL 33993
>
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