use compile uvc_video

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)

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

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

Is there a way I can just compile the linux/drivers/media/video/uvc ?

thats all I need. How do I do that?

Quoted 3 lines · Jerry Geis

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.

Quoted 6 lines

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. :)

Quoted 7 lines

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.

Quoted 2 lines

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.

Quoted 2 lines

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. :)

Quoted 14 lines

Quoted 2 lines

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.

Quoted 2 lines

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

Quoted 8 lines

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.