From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andreas Ziegler <br015@umbiko.net>
Date: Tue, 20 Jul 2021 05:03:20 +0000
Subject: [Buildroot] Question Linux-Module infrastructure
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Hi Jacques,

On 2021-07-19 21:53, Jacques Samoun <jacques.samoun33@gmail.com> wrote:

> Hello,
> 
> I am using external tree build in my project. Trying to add a linux 
> kernel
> driver that i am developing.
> My problem is that, the sources of my driver are not flat but arranged, 
> for
> various reasons in the following manner:
> <mydriver>
>                <some files>
>                <top makefile>
>               +--- inc
>                    <shared includes>
>               +--- user
>                      <files>
>                       <Makefile>
>               +--- kernel
>                        <files>
>                        <Makefile>
> 
> My hal.mk is  (hal is the name of the package)
> 
> HAL_VERSION = 1.0.0
> HAL_SITE =  ../top/source/hal
> HAL_SITE_METHOD = local

You probably just need a statement to point the kernel build to the 
correct subdirectory:

HAL_MODULE_SUBDIRS = kernel

Kind regards,
Andreas