/etc/kernels missing?

braver · n00b Joined: 29 Dec 2006 Posts: 28

I'm emerging suspend2-sources, using the .config I crafted before, and the kernel guide describes how:

http://www.gentoo.org/doc/en/kernel-upgrade.xml

Code Listing 10.1: Reusing your old config

# cd /usr/src/linux-2.6.9-gentoo-r2
# cp ../linux-2.6.9-gentoo-r1/.config .
# make oldconfig

Code Listing 10.2: Reusing your old config with genkernel

# cd /etc/kernels
# cp kernel-config-x86-2.6.9-gentoo-r1 kernel-config-x86-2.6.9-gentoo-r2
# genkernel all

However, on 2006.1, I don't have /etc/kernels, only /etc/genkernel.conf.

When I do genkernel all, I see it copied config from /usr/share/genkernel/x86/kernel-config-x86, so I replaced it with my .config as a quick and dirty fix. What's the right way to do it nowadays? Also, what about eselect for symlink?

Cheers,
Alexy

Akhouk · Posted: Mon Jan 22, 2007 6:48 am Post subject:

Did you compile your original kernel with genkernel?

genkernel by default take the kernel config from the /usr/share/genkernel/ directories and uses that. It then stores the kernel config in /etc/kernels once it has finished so next time it will use it from there for rebuilding. It seems you don't have an /etc/kernels because you didn't use genkernel for building the kernel.

If you are in doubt about where your kernel config is you can always copy the existing config from /proc/config.gz (if you have it in your kernel), gunzip it and use genkernel with the --kernel-config flag to rebuild.
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braver · n00b Joined: 29 Dec 2006 Posts: 28

OK, will run genkernel to completion then... Is there any way to tell it to respect my separate build directory outside source?

Akhouk · Posted: Mon Jan 22, 2007 7:22 am Post subject:

braver · n00b Joined: 29 Dec 2006 Posts: 28

Actually, I mean the option

make O=/different/object/dir menuconfig

you can use in a kernel source dir, to keep it intact and pristine, compiling everything separately.

I found you can point --kerneldir at *that* build dir! Hurray! In a few minutes there'll hopefully be a gentoo-compiled object kernel directory separate from the kernel sources!

Why am I doing this? I share kernel source partition, mounting it from Gentoo, SuSE, or Arch on the same box. So the objects will be different as produced by slightly different gcc's, but the source can be the same!

bLUEbYTE84 · Posted: Mon Jan 22, 2007 8:44 pm Post subject:

There is another way of getting configuration file from a running kernel, provided that this support has been compiled: