[linux-yocto] Build Kernel module on target

[Darren Hart]

On 08/16/2012 04:31 PM, Bodke, Kishore K wrote:
> Hi Darren,

Hi Kishore,

> I am trying to build the Kernel Module on the target with sdk image.
> I get the below error for all the kernel modules I am building.
> 
> == Build lib/librte_eal/linuxapp/igb_uio
> 
> make: *** /lib/modules/3.4.6-yocto-standard/build: No such file or
> directory.  Stop.
> 
> make[7]: *** [igb_uio.ko] Error 2
> 
> Makefile has the kernel source directory  set like below.
> 
> RTE_KERNELDIR = /lib/modules/$(shell uname -r)/build
> 
> And I see there is no build directory there in
> /lib/modules/3.4.6-yocto-standard .
> 
> I changed the RTE_KERNELDIR to
> 
> RTE_KERNELDIR =/usr/src/kernel

Correct.

> This time it went further to build the kernel module but failed for the
> 
> /usr/src/kernel/scripts/recordmcount: No such file or directory
> 
> I saw the ${STAGING_KERNEL_DIR} for the recordmcount.  There is no such file
> I think we need  scripts/recordmcount to be a part of the final image?

This is an unfortunate result of the kernel building those "scripts" for
the host, which we can't deploy to the target. We intentionally remove
them. To build on the target, you must first build the "scripts":

$ cd /usr/src/kernel
$ make scripts

Then try to build your modules.

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Technical Lead - Linux Kernel