Re: "debug mode" for config(1)

[Paul Goyette <paul%whooppee.com@localhost>]

On Sat, 28 Dec 2013, Paul Goyette wrote:

> Is there a "debug" mode available for config?
>
> I would like to know why a particular source file is being included in my 
> kernel.  :)

<snip>

OK, problem solved, with a large dose of embarassment!

It seems that I had forgotten that my kernel config included both of

        pseudo-device crypto
        pseudo-device swcrypto

which obviously cause all of opencrypto to be brought in to the kernel.

<snip>

> Why do I care, if everything works?  Well, VND_COMPRESSION is defined when 
> building src/sys/modules/vnd/ and that appears to require access to the stuff 
> in net/zlib.c.  But net/zlib.c is not linked as part of the module, so 
> loading the module would/should fail if the appropriate symbols/routines are 
> not available in the kernel.  So it would seem that some mechanism needs to 
> exist to ensure that the zlib stuff can be made available, perhaps as a 
> separate module (similar to the way that the dev/dksubr.c stuff is now 
> available for use in the vnd, cgd, and ccd modules).

Yup.  If I remove the pseudo-devices from my kernel config, then the vnd 
module fails to load.

I'll make net/zlib.c into its own tiny module tomorrow.


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