Building on a raspberry pi 4 -debian:stretch

[tjb81]

Hi, i am trying to build this via docker on a raspberry pi 4 with debian stretch. I want to use the USB3HDCAP as an input device for /dev/video0 to stream it out via a RTSP server using v4l2rtspserver. I am using using a Dockerfile.template to try to compile it via the following command:
# Install hdcapm RUN git clone https://github.com/stoth68000/hdcapm.git /app/hdcapm \ && ( cd /app/hdcapm && make arm)
But it looks like it will not compile. any help available?
here is the error:
Cloning into '/app/hdcapm'... Building ARM make ARCH=arm CROSS_COMPILE=arm-v7a-linux-gnueabihf- -C /KL/ZODIAC-IMX6-HDCAPM-TOOLCHAIN/linux-4.13 M=/app/hdcapm KCPPFLAGS="" modules make[1]: *** /KL/ZODIAC-IMX6-HDCAPM-TOOLCHAIN/linux-4.13: No such file or directory. Stop. Makefile:34: recipe for target 'arm' failed make: *** [arm] Error 2

[stoth68000]

Is your kernel source installed in /KL/ZODIAC-IMX6-HDCAPM-TOOLCHAIN/linux-4.13 ?

"modules make[1]: *** /KL/ZODIAC-IMX6-HDCAPM-TOOLCHAIN/linux-4.13: No such file or directory"

[tjb81]

thanks for the quick response. actually, I will have to look as I am trying to build this into a Docker container. I am using something called Balena on the Rpi4 which has a HostOS in a module, and this is built in a container. So I am not sure if i can add it. I just wish this device acted like a normal usb capture device :-P. I am not sure if this will help. https://github.com/balena-os/kernel-module-build