* Type emerge --help config to learn how to update config files.
localhost kaiser # genkernel --kernel-config=/usr/src/linux/config --menuconfig --bootloader=grub --gensplash=sabayon all
* Gentoo Linux Genkernel; Version 3.4.6
* Running with options: --kernel-config=/usr/src/linux/config --menuconfig --bootloader=grub --gensplash=sabayon all

* Linux Kernel 2.6.21-rc5-sabayon for x86...
* kernel: >> Running mrproper...
* config: Using config from /usr/src/linux/config
*         Previous config backed up to .config.bak
cp: cannot stat `/usr/src/linux/config': No such file or directory
* ERROR: Could not copy configuration file!

* -- Grepping log... --

* config: Using config from /usr/src/linux/config
*         Previous config backed up to .config.bak
* Gentoo Linux Genkernel; Version 3.4.6
* Running with options: --kernel-config=/usr/src/linux/config --menuconfig --bootloader=grub --gensplash=sabayon all

* ERROR: Could not copy configuration file!

* -- End log... --

* Please consult /var/log/genkernel.log for more information and any
* errors that were reported above.

* Report any genkernel bugs to bugs.gentoo.org and
* assign your bug to genkernel@gentoo.org. Please include
* as much information as you can in your bug report; attaching
* /var/log/genkernel.log so that your issue can be dealt with effectively.
*
* Please do *not* report compilation failures as genkernel bugs!