[gentoo-dev] Video4Linux and linux headers

[gentoo-dev] Video4Linux and linux headers

[Diego 'Flameeyes' Pettenò]

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Hi,
I don't remember why I started looking at avifile this night, but while I was 
at it, I found something which uncovers a bit of troubles with v4l useflag.

Summarizing:

v4l useflag enables Video4Linux support (usually webcams and tv cards) on many 
multimedia softwares (like avifile, but not only).
As v4l is related to kernel, it needs kernel's headers to be used by software 
(usually linux/videodev.h file).
V4L is not avaiable on non-linux systems.

Now, I was trying to add dependency on headers if v4l was used, but adding a 
simple v4l? ( sys-kernel/linux-headers ) doesn't work as mips uses 
mips-headers.
I'm not sure to use virtual/os-headers as it targets also non-linux headers.

But then joem and geoman pointed out that v4l should only be used on linux, so 
it should be usemasked on other arches.

Now what? I'm going to ask here what to do with this. I think the right way 
should be adding v4l to base/use.mask and then -v4l on 
default-linux/use.mask, as it's strictly-linux thing.

-- 
Diego "Flameeyes" Pettenò
http://dev.gentoo.org/~flameeyes/

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Re: [gentoo-dev] Video4Linux and linux headers

[Mike Frysinger]

On Sunday 17 April 2005 08:07 pm, Diego 'Flameeyes' Pettenò wrote:
> Now what? I'm going to ask here what to do with this. I think the right way
> should be adding v4l to base/use.mask and then -v4l on
> default-linux/use.mask, as it's strictly-linux thing.

this probably falls along side the USE refactoring someone else suggested 
where we use.mask everything in base/use.mask that is arch-specific and only 
unmask in appropriate profiles
-mike

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gentoo-dev@gentoo.org mailing list

Re: [gentoo-dev] Video4Linux and linux headers

[Diego 'Flameeyes' Pettenò]

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On Monday 18 April 2005 04:04, Mike Frysinger wrote:
> this probably falls along side the USE refactoring someone else suggested
> where we use.mask everything in base/use.mask that is arch-specific and
> only unmask in appropriate profiles
So what? This, imho, should be done also for alsa and oss (just to take media 
useflags which I'm more used to handle), which are linux (and obsd/nbsd, in 
case of oss) specific.

I can get a list of flags to mask/unmask, if this is feasible, and commit them 
in the next days, cleaning up deps.

-- 
Diego "Flameeyes" Pettenò
http://dev.gentoo.org/~flameeyes/

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Re: [gentoo-dev] Video4Linux and linux headers

[Mike Frysinger]

On Monday 18 April 2005 05:56 am, Diego 'Flameeyes' Pettenò wrote:
> On Monday 18 April 2005 04:04, Mike Frysinger wrote:
> > this probably falls along side the USE refactoring someone else suggested
> > where we use.mask everything in base/use.mask that is arch-specific and
> > only unmask in appropriate profiles
>
> So what?

so what -> in other words, we should do this together instead of 1 USE flag at 
a time :P

> This, imho, should be done also for alsa and oss (just to take 
> media useflags which I'm more used to handle), which are linux (and
> obsd/nbsd, in case of oss) specific.
>
> I can get a list of flags to mask/unmask, if this is feasible, and commit
> them in the next days, cleaning up deps.

if by commit you mean the profiles then i think you should go make a list of 
specific USE flags and drop it onto the gentoo-dev list before committing :p
-mike

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Re: [gentoo-dev] Video4Linux and linux headers

[Diego 'Flameeyes' Pettenò]

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On Monday 18 April 2005 20:27, Mike Frysinger wrote:
> if by commit you mean the profiles then i think you should go make a list
> of specific USE flags and drop it onto the gentoo-dev list before
> committing :p:p -mike

Ok here we are :) This is the list of *global* flags which are linux specific:

alsa
direcfb
hal
lirc
lm_sensors
oss (common to netbsd/openbsd)
svga
sysfs
symlink
v4l

I'll try to find the local ones but they are quite.. many :P

-- 
Diego "Flameeyes" Pettenò
Gentoo Developer (Gentoo/FreeBSD, Video, Gentoo/AMD64)

http://dev.gentoo.org/~flameeyes/


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Re: [gentoo-dev] Video4Linux and linux headers

[Mike Frysinger]

On Tuesday 19 April 2005 03:57 pm, Diego 'Flameeyes' Pettenò wrote:
> This is the list of *global* flags which are linux specific:

erm i was trying to trick you into doing arch/os specific ones, not just os 
specific :)
-mike

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gentoo-dev@gentoo.org mailing list

Re: [gentoo-dev] Video4Linux and linux headers

[Diego 'Flameeyes' Pettenò]

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On Tuesday 19 April 2005 22:16, Mike Frysinger wrote:
> erm i was trying to trick you into doing arch/os specific ones, not just os
> specific :):)
I think the only arch-specific ones I know on global are the 
mmx/mmxex/mmx2/3dnow/3dnowex/sse flags.
I really don't know what other can be removed as I'm not exactly an expert of 
other arches, as I only have x86/amd64/ppc (and this one hasn't linux for 
now).

I'll see the local useflags later, there there can be some useflag I know are 
arch specific.

-- 
Diego "Flameeyes" Pettenò
Gentoo Developer (Gentoo/FreeBSD, Video, Gentoo/AMD64)

http://dev.gentoo.org/~flameeyes/


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Re: [gentoo-dev] Video4Linux and linux headers

[Jan Kundrát]

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Diego 'Flameeyes' Pettenò wrote:
> I think the only arch-specific ones I know on global are the 
> mmx/mmxex/mmx2/3dnow/3dnowex/sse flags.

Maybe also "altivec"?

-jkt

-- 
cd /local/pub && more beer > /dev/mouth


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Re: [gentoo-dev] Video4Linux and linux headers

[Greg KH]

On Tue, Apr 19, 2005 at 09:57:29PM +0200, Diego 'Flameeyes' Petten? wrote:
> On Monday 18 April 2005 20:27, Mike Frysinger wrote:
> > if by commit you mean the profiles then i think you should go make a list
> > of specific USE flags and drop it onto the gentoo-dev list before
> > committing :p:p -mike
> 
> Ok here we are :) This is the list of *global* flags which are linux specific:
> 
> sysfs

Ugh, why is this global?  It looks like only DirectFB is using it, which
is hardly a reason to have a global use flag :(

Care to fix this?

thanks,

greg k-h
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gentoo-dev@gentoo.org mailing list

Re: [gentoo-dev] Video4Linux and linux headers

[Mike Frysinger]

On Tuesday 19 April 2005 07:06 pm, Greg KH wrote:
> On Tue, Apr 19, 2005 at 09:57:29PM +0200, Diego 'Flameeyes' Petten? wrote:
> > On Monday 18 April 2005 20:27, Mike Frysinger wrote:
> > > if by commit you mean the profiles then i think you should go make a
> > > list of specific USE flags and drop it onto the gentoo-dev list before
> > > committing :p:p -mike
> >
> > Ok here we are :) This is the list of *global* flags which are linux
> > specific:
> >
> > sysfs
>
> Ugh, why is this global?  It looks like only DirectFB is using it, which
> is hardly a reason to have a global use flag :(

my fault, i'll fix
-mike
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