LinuxQuestions.org - building external module, howto override CONFIG

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- - building external module, howto override CONFIG_ option? (https://www.linuxquestions.org/questions/linux-kernel-70/building-external-module-howto-override-config_-option-912876/)

building external module, howto override CONFIG_ option?

I'm patching and rebuilding psmouse.ko. The patch contains a config option and I'd like to be able to easily set it.

My make call:

Code:

KDIR=/lib/modules/$(uname -r)/build

make -C $KDIR M="$PWD/drivers/input/mouse" psmouse.ko

I've tried to just set the the option on the command line like

Code:

make CONFIG_OPTION=y ...

I've also tried copying the config file over

Code:

cp $KDIR/.config config

echo CONFIG_OPTION=y >> config

export KCONFIG_CONFIG=$PWD/config

make ...

So far the only thing that works, which feels messy is to rsync the kernel headers from KDIR on top of the source I'm building.

Any ideas?

Why not just make menuconfig as needed and make drivers/input/mouse/psmouse.ko? If your config option isn't in drivers/input/mouse/Kconfig just pop that file open and put it in.

This is for an automated PKGBUILD for Arch. What you're suggesting is similar to my attempt to use KCONFIG_CONFIG, but that variable doesn't seem to do anything for making a module. For now (and probably permanently) I've just removed the CONFIG option from the patch.

For reference: https://github.com/mmonaco/synaptics-led