On Thu, 2012-07-05 at 02:49 +0300, Maxim Kammerer wrote: > On Wed, Jul 4, 2012 at 9:56 PM, William Hubbs <willi...@gentoo.org> wrote: > > Actually the directories do not need write permissions either. Take a > > look at the O= option documented in /usr/src/linux/README. > > The KBUILD_OUTPUT / O= option seems like the best solution to me > (especially so as I build three kernel images from a single sources > tree), and it works well, except that it sometimes doesn't with > especially monstrous and hard to configure packages such as > virtualbox-guest-additions — see bug #424816.
I've experimented with O= in the past. It seems like a good solution, however... There are kernel-dependent packages that (seem to) always look for configuration options, symbols, etc. in /usr/src/linux. When you use O= then those features do not exist in /usr/src/linux and thus those packages will fail. So I have basically abandoned using O=. Might it be better if you could tell portage to look for kernel builds in another location than /usr/src/linux. Perhaps you can already and I'm not aware. If not, then this just be a lot of work and perhaps the benefits do not outweigh the effort involved? Anyway, just something to think about. -a
