Re: [gentoo-dev] linux-info.eclass: lacking sources, config checks and module building

[Robin H. Johnson]

On Mon, Sep 07, 2009 at 10:28:11AM +0100, Daniel Drake wrote:
> Robin H. Johnson wrote:
> >It does NOT check /proc/config.gz presently. The original logic against
> >not checking /proc was that we were targeting the kernel being built,
> >but that's moot given the use of `uname -r` in OUTPUT_DIR.
> That seems like a bug. OUTPUT_DIR should default to unset which
> would cause the internal KV_OUT_DIR to be set to KV_DIR.  However I
> can see from the code that's not the case, and it's not clear why.
It's messy. I'll maybe tackle it after I'm done the work on configs and
USE=modules.

> Relying on "uname -r" or /proc/config.gz is still something we
> should avoid (unless user configured, perhaps, or in very
> exceptional circumstances) however it looks like this isn't a change
> that you are proposing.
The only time I'm saying that uname -r and /proc/config.gz are looked
as, is where there is no kernel sources or they are installed but not
configured. But that is as part of a larger body of work to fix up all
packages that are merely checking the kernel options during build, not
relying on the config to build.

Kernel modules still require configured sources to be installed.

> Thanks for working on this. It's a sensitive area so please take
> care and help people pick up the pieces. If you are really
> motivated, it might be worth rethinking the whole separate output
> directory implementation.
For anybody following this, we're doing the work on two tracker bugs:
283320 - Changes to linux-info
283900 - USE=modules change for linux-mod and packages.

We've got the core eclass stuff done, but not enabled yet.

If you want to test it it:
1. mv your .config or entire kernel sources away
2. I_KNOW_WHAT_I_AM_DOING=1 emerge udev

You should get warnings, but no errors.

-- 
Robin Hugh Johnson
Gentoo Linux: Developer, Trustee & Infrastructure Lead
E-Mail     : robbat2@g.o
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