[SOLVED] oldconfig

mreff555 · 01-22-2013, 02:41 PM

Can Someone clarify exactly what make oldconfig does. Does it pull the information from /proc/config.gz?

what if I have a different .config file that I wanted to update. One that is not the current kernel configuration. Can that be done with make oldconfig?

gilead · 01-22-2013, 04:55 PM

If you use your old .config file with your new kernel sources and run make oldconfig it will default all questions based on the contents of that .config file and only ask about new config symbols (that was from the kernel README).

You could back up your source tree and try it with your old .config file. If it compiles, when you install the new kernel don't remove the old one so you can go back to the old kernel if necessary.

mreff555 · 01-24-2013, 03:25 PM

Ok, So if I understand you correctly, typing "make oldconfig" WILL default to "./.config" before searching the proc system?

TobiSGD · 01-24-2013, 05:23 PM

make oldconfig will never get the config from /proc. It will use ./.config and if it can't find that file it will use the default kernel configuration:

Code:

# using defaults found in arch/x86/configs/i386_defconfig

mreff555 · 01-25-2013, 08:29 AM

Thank you. That's exactly what I was looking for.