On Fri, Jul 16, 2010 at 12:19 PM, Nicolas Pitre [off-list ref] wrote:

On Fri, 16 Jul 2010, Grant Likely wrote:

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On Fri, Jul 16, 2010 at 10:03 AM, Catalin Marinas
[off-list ref] wrote:

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On Wed, 2010-07-14 at 00:04 +0100, Grant Likely wrote:

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- It still doesn't resolve dependencies. =A0A solver would help with =

this.

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=A0 For the time being I work around the problem by running the gener=

ated

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=A0 config through 'oldconfig' and looking for differences. =A0If the=

 files

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=A0 differ (ignoring comments and generateconfig_* options) after old=

config,

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=A0 then the <board>_defconfig target returns a failure. =A0(but leav=

es the

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=A0 new .config intact so the user can resolve it with menuconfig). =

=A0This

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=A0 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=3Dlinux/kernel/git/cmarinas/linux-2.6-cm.git;=

a=3Dcommitdiff_plain;h=3D5d87db2d2a332784bbf2b1ec3e141486f4d41d6f

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sfr and I were talking about your patch the other day. =A0Just warning
on incomplete dependencies is enough to make it actually workable for
me (without my ugly post-processing step). =A0I was very happy to hear
that it is in linux-next.

Last missing piece is being able to do "select FOO =3D 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. =A0This 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=3Dy, 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.

g.