[RFC PATCH] Kconfig: Enable Kconfig fragments to be used for defconfig
grant.likely at secretlab.ca
Fri Jul 16 14:21:27 EDT 2010
On Fri, Jul 16, 2010 at 12:19 PM, Nicolas Pitre <nico at fluxnic.net> wrote:
> On Fri, 16 Jul 2010, Grant Likely wrote:
>> On Fri, Jul 16, 2010 at 10:03 AM, Catalin Marinas
>> <catalin.marinas at arm.com> wrote:
>> > On Wed, 2010-07-14 at 00:04 +0100, Grant Likely wrote:
>> >> - It still doesn't resolve dependencies. A solver would help with this.
>> >> For the time being I work around the problem by running the generated
>> >> config through 'oldconfig' and looking for differences. If the files
>> >> differ (ignoring comments and generateconfig_* options) after oldconfig,
>> >> then the <board>_defconfig target returns a failure. (but leaves the
>> >> new .config intact so the user can resolve it with menuconfig). This
>> >> way at least the user is told when a Kconfig fragment is invalid.
>> > It's not a solver but I'm pushing a patch to warn on selecting symbols
>> > with unmet dependencies so that you can select further symbols (manual
>> > solving). The patch is in linux-next but you also can grab it from:
>> > http://git.kernel.org/?p=linux/kernel/git/cmarinas/linux-2.6-cm.git;a=commitdiff_plain;h=5d87db2d2a332784bbf2b1ec3e141486f4d41d6f
>> sfr and I were talking about your patch the other day. Just warning
>> on incomplete dependencies is enough to make it actually workable for
>> me (without my ugly post-processing step). I was very happy to hear
>> that it is in linux-next.
>> Last missing piece is being able to do "select FOO = n", which Stephen
>> is currently working on.
> Instead of (or in addition to) warning for incomplete
> dependencies, I'd much prefer if the prerequisites were recursively
> selected automatically. This way if some options are moved inside a
> submenu at some point with a config symbol for that subcategory
> (e.g. CONFIG_NETDEV_1000), or if the subsystem is reorganized into
> submodules that are required for some driver to work, then my
> config will still be fine.
> For example, if I want CONFIG_MTD_CMDLINE_PARTS=y, the system may be
> smart enough to notice and automatically enable CONFIG_MTD and
> CONFIG_MTD_PARTITIONS without having to carry those in the defconfig.
I fully agree. However, the warnings make the system work now while
we wait for a full solver to be implemented.
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