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Date:      Tue, 17 Nov 2009 20:47:40 -0500
From:      Ben Kelly <ben@wanderview.com>
To:        Gonzalo Nemmi <gnemmi@gmail.com>
Cc:        freebsd-current@freebsd.org
Subject:   Re: WITHOUT_MODULES, does it actually work?
Message-ID:  <70268D94-FB8F-4E24-89F5-7E1718EF4267@wanderview.com>
In-Reply-To: <19e9a5dc0911171614l42f4c90ci2abce9982727ef61@mail.gmail.com>
References:  <200911172021.16848.gnemmi@gmail.com> <41D86F39-D98A-4195-8345-765E0F742FAE@wanderview.com> <19e9a5dc0911171614l42f4c90ci2abce9982727ef61@mail.gmail.com>

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On Nov 17, 2009, at 7:14 PM, Gonzalo Nemmi wrote:

> On Tue, Nov 17, 2009 at 8:14 PM, Ben Kelly <ben@wanderview.com> wrote:
>=20
>>=20
>> On Nov 17, 2009, at 5:21 PM, Gonzalo Nemmi wrote:
>>=20
>>> I've been playing around with it (RC3, i386) and got it to look like
>>> this (/etc/make.conf):
>>>=20
>>> WITHOUT_MODULES=3D dev/firewire dev/bwi dev/bce dev/bfe dev/iwi =
dev/iwn
>>> zfs sound/driver/ad1816 sound/driver/ai2s sound/driver/als4000
>>> sound/driver/atiixp sound/driver/audiocs sound/driver/cmi
>>> sound/driver/cs4281 sound/driver/cs4281 sound/driver/csa
>>> sound/driver/davbus sound/driver/ds1 sound/driver/emu10k1
>>> sound/driver/emu10kx sound/driver/envy24 sound/driver/envy24ht
>>> sound/driver/es137x sound/driver/ess sound/driver/fm801
>>> sound/driver/ich sound/driver/maestro3 sound/driver/mss
>>> sound/driver/neomagic sound/driver/sb16 sound/driver/sb8
>>> sound/driver/sbc sound/driver/solo sound/driver/spicds
>>> sound/driver/t4dwave sound/driver/uaudio sound/driver/via8233
>>> sound/driver/via82c686 sound/driver/vibes
>>>=20
>>> Well .. I don't know what's wrong but no matter what, all of those
>>> modules and stuff still get built and end up under /boot/kernel ... =
I
>>> just need "sound" and "snd_hda"...
>>>=20
>>> What am I doing wrong?
>>> Any hint will help
>>=20
>> I think the contents of WITHOUT_MODULES should be the short names of =
the
>> directories in /usrc/src/sys/modules.  So iwn instead of dev/iwn.  =
Also, it
>> looks like you can only exclude modules at this top level directory
>> granularity.  So you can exclude sound, but not a particular device =
under
>> sound.
>>=20
>> Anyway, thats based on a quick read of the Makefile.  I could be =
wrong,
>> though.  I've never actually used this feature.
>>=20
>> Hope that helps.
>>=20
>> - Ben
>=20
>=20
> Hi Ben!
> It could be that .. will try as soon as I can .. I didn't try before =
because
> most examples I found on google use it like that .. even the FreeBSD
> handbook:
> =
http://www.freebsd.org/doc/en/books/handbook/kernelconfig-building.html(ta=
ke
> a look at the second "tip" in point 8.5).

I've just verified on my machine that WITHOUT_MODULES will only strip =
out top level module directories.  You cannot pick and choose =
subdirectories like the handbook suggests.  I'm guessing someone cut & =
paste the MODULES_OVERRIDE line to add the WITHOUT_MODULES entry.  =
Selecting subdirectories works in the MODULES_OVERRIDE case, though, =
because you can add a subdirectory even if the original list you are =
replacing only contains the top level module directories.

Also, the current implementation of WITHOUT_MODULES does not support =
being set in your kernel config using makeoptions.  This patch fixes =
that for me:

Index: sys/conf/kern.pre.mk
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/conf/kern.pre.mk        (revision 254)
+++ sys/conf/kern.pre.mk        (working copy)
@@ -163,6 +163,9 @@
 .if defined(MODULES_OVERRIDE)
 MKMODULESENV+=3D MODULES_OVERRIDE=3D"${MODULES_OVERRIDE}"
 .endif
+.if defined(WITHOUT_MODULES)
+MKMODULESENV+=3D WITHOUT_MODULES=3D"${WITHOUT_MODULES}"
+.endif
 .if defined(DEBUG)
 MKMODULESENV+=3D DEBUG_FLAGS=3D"${DEBUG}"
 .endif

Hope that helps.

- Ben=



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