[yocto] How to let a kernel module depend on another kernel module ?

[winfried.dobbe at xmsnet.nl]

Hi all,

I am upgrading our BSP from Krogoth to Sumo. I have read the 
documentation about the recipe-specific sysroots and this works fine for 
normal recipes.
However I am stuck with upgrading the out-of-tree kernel module recipes.

We have kernel-module-foo and kernel-module-bar. The bar module needs 
header files that foo module installs in usr/include/linux.
I added DEPENDS = "kernel-module-foo" to the recipe of module bar. The 
recipe-sysroot directory for kernel-module-bar does indeed have the foo 
include files.

However compilation of kernel-module-bar stops with an error because it 
can't find the foo header files.

So does anyone know what is the correct way to let one out-of-tree 
kernel module depend on another one?

thanks in advance,

Winfried