"sudo make modules_prepare" fails

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
1

We’re trying to build a custom kernel module and receive the below failure:

jetson-0423018055078# pwd
/usr/src/linux-headers-4.9.108-tegra

jetson-0423018055078# sudo make modules_prepare
scripts/kconfig/conf  --silentoldconfig Kconfig
arch/arm64/Kconfig:1221: can't open file "drivers/firmware/tegra/Kconfig"
scripts/kconfig/Makefile:37: recipe for target 'silentoldconfig' failed
make[2]: *** [silentoldconfig] Error 1
Makefile:562: recipe for target 'silentoldconfig' failed
make[1]: *** [silentoldconfig] Error 2
make: *** No rule to make target 'include/config/auto.conf', needed by 'include/config/kernel.release'.  Stop.

This is with latest Jetpack on the Xavier (4.0) with all options installed. Gcc version 7.3.0.

Any help would be most appreciated

2

Looks like you need to download the l4t kernel source and run that command in the source folder. The directory you are in is just the headers.