I am trying to build kernel driver for e-paper display over SPI bus (GitHub - repk/epd: Epaper Display Linux kernel driver for EM027AS012).
I have successfully build and downloaded latest kernel into my colibri-vf50 using the steps described in (OpenEmbedded (core) - Toradex System/Computer on Modules)
After building and installing the toolchain, I have exported the environment variable and started cross-compile for the github project.
This now reports a missing configuration for kernel.
I would like to keep the kernel configuration during build. Can you please help?
Output of the make command.
make -C /home/me/oe/build/tmp-glibc/work-shared/colibri-vf/kernel-source/ M=/home/me/work/epd/build/epd modules make: Entering directory '/home/me/oe/build/tmp-glibc/work-shared/colibri-vf/kernel-source' ERROR: Kernel configuration is invalid. include/generated/autoconf.h or include/config/auto.conf are missing. Run 'make oldconfig && make prepare' on kernel src to fix it. WARNING: Symbol version dump ./Module.symvers is missing; modules will have no dependencies and modversions. Building modules, stage 2. scripts/Makefile.modpost:42: include/config/auto.conf: No such file or directory make: *** No rule to make target 'include/config/auto.conf'. Stop. Makefile:1408: recipe for target 'modules' failed make: *** [modules] Error 2 make: Leaving directory '/home/me/oe/build/tmp-glibc/work-shared/colibri-vf/kernel-source' Makefile:40: recipe for target 'default' failed make: *** [default] Error 2