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Date: Thu, 26 May 2011 10:25:01 -0400
From: Jerry Geis <geisj@MessageNetSystems.com>
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To: Jarod Wilson <jarod@wilsonet.com>
CC: linux-media@vger.kernel.org
Subject: Re: use compile uvc_video
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Jarod,

Jarod Wilson wrote:
> On May 26, 2011, at 9:11 AM, Jerry Geis wrote:
>
>   
>> I am using centos 5.6 (older kernel) and I get compile errors when I grabbed
>> the latest from http://linuxtv.org/hg/v4l-dvb (which I expect as I have an older 2.6.18 kernel)
>>     
>
> Okay, but do realize that it hasn't been updated in ages, and its
> completely unmaintained.
>
>
>   
>> All I need is uvc so I thought I would do "make menuconfig" and turn everything off
>> but v4l/UVC stuff.
>>
>> when I do make I get an error:
>> Kernel build directory is /lib/modules/2.6.18-194.32.1.el5/build
>>     
>
> That's not a 5.6 kernel, its a 5.5 kernel. (5.6 is 2.6.18-238.x.y.el5).
> Doesn't really make a difference, but felt compelled to point it out. :)
>
>
>   
>> make -C /lib/modules/2.6.18-194.32.1.el5/build SUBDIRS=/home/silentm/MessageNet/v4l/new/v4l-dvb-3724e93f7af5/v4l  modules
>> make[2]: Entering directory `/usr/src/kernels/2.6.18-194.32.1.el5-x86_64'
>> CC [M]  /home/silentm/MessageNet/v4l/new/v4l-dvb-3724e93f7af5/v4l/tuner-xc2028.o
>> In file included from /home/silentm/MessageNet/v4l/new/v4l-dvb-3724e93f7af5/v4l/tuner-xc2028.c:19:
>> /home/silentm/MessageNet/v4l/new/v4l-dvb-3724e93f7af5/v4l/compat.h:133: error: static declaration of 'strict_strtoul' follows non-static declaration
>> include/linux/kernel.h:141: error: previous declaration of 'strict_strtoul' was here
>>     
>
> The above lines tell you exactly what the failure was, and its easily
> worked around by removing the extraneous definition from v4l/compat.h.
>
>
>   
>> Is there a way I can just compile the linux/drivers/media/video/uvc ?
>>     
>
> Edit the .config file, disable anything you don't want to build.
>
>
>   
>> thats all I need. How do I do that?
>>     
>
> Another option you can try is something along the lines of this:
>
> cd linux/drivers/media/video/uvc
> make -C /lib/modules/2.6.18-194.32.1.el5/build M=$PWD modules
>
> No guarantees that won't fail miserably though.
>
> Backporting newer drivers to older kernels often takes a fair bit of
> effort and subject matter expertise -- especially when the kernel base
> is as ancient as the one you're targeting. There's a reason media_build
> doesn't support anything that old. :)
>
>   
I am trying your suggestion. with the "make -C" when I do this I get 
errors about
include files not found. I was trying to specify "-I path/v4l -I 
path/linux/include" on the make line
but it still does not find the compat.h and linux/usb.video.h

Your correct, my machines 5.6 and I was compiling on 5.5 machine.

How do I correctly specify the include paths?

Thanks

Jerry