You should be posting to the devel@ mailing list instead.
To answer your question, this is not supported in zephyr.
Anas
From:
<builds@...> on behalf of "Zha, Qipeng" <qipeng.zha@...> Date: Tuesday, 21 May 2019 at 06:33 To: "Zephyr-builds@..." <Zephyr-builds@...> Subject: [Zephyr-builds] zephyr build env for external module
Hi
In Linux, there will be some driver modules are external, can be put outside in linux kernel tree and build with a simple Makefile.
For zephyr, is there similar usage can work as this ? thx.