Re: SOLVED = RE: Alsa & 2.6 kernel

[Takashi Iwai <tiwai@suse.de>]

At Thu, 25 Sep 2003 07:45:08 -0700,
Mark Knecht wrote:
> 
> > At Wed, 24 Sep 2003 14:24:29 -0700,
> > Mark Knecht wrote:
> > >
> > > I see that in the Gentoo kernel tree (and maybe all 2.6 kernels)
> > > linux/drivers/sound has moved to linux/sound.
> >
> > the OSS drivers are located now on linux/sound/oss.
> > the other sound directories correspond to ALSA's alsa-kernel tree
> > (except for alsa-kernel/include -> linux/include/sound, and
> >  alsa-kernel/Documentation -> linux/Documentation/sound/alsa).
> >
> >
> > Takashi
> >
> 
> Takashi-san,
>    Thank you very much for the response. It is helpful.
> 
>    Would I be correct that if I had a 2.6 level kernel and wanted to use the
> newest Alsa from CVS, then I would:
> 
> 1) Download CVS to my machine in it's own directory
> 2) Replace what is currently in linux/sound with the CVS source EXCEPT for
> the oss directory which I would leave alone.
> 3) Build the kernel with Alsa sound support and no OSS support
> 4) Use Alsa to do OSS emulation like I do today in modules.conf
> 
>    In linux/sound there are a few other files - Kconfig, etc. If these are
> not supplied by Alsa CVS, then I would leave them in linux/sound to perform
> whatever function they perform today.
> 
>    Does this sound about right? I may try it out one of these days.

yes.  alsa-kernel tree includes the all files (including Kconfig)
except for OSS driver codes under oss directory.

please remember the difference of alsa-kernel and alsa-driver trees.
for 2.6.x kernel, only alsa-kernel tree is used.

also, you can build on alsa-drivers as well as 2.4.x (i fixed this
yesterday).  but in this case, note that the kernel configuration will
override the local configuration of alsa-driver (provided by configure
script).
for example, if you turn off the ALSA support on 2.6.x kernel config,
you cannot build on alsa-drivers tree properly at all.
this causes often problems when CONFIG_SND_DEBUG mismatches between
kernel and alsa-driver trees.

also, when the kernel is compiled with MODVERSION, you'll have many
compile warnings on alsa-driver tree, due to redefinition of symbols.
but you can ignore them in general.


ciao,

Takashi


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