DAHDI 2.6.1 does not build in Linux kernel 3.8.0-29-generic

[nazish.kanwal.cs]

Hi,

I downloaded source codes of DAHDI 2.6.1 and Linux Kernel 3.8.0-29-generic.

When I typed sudo apt-get install linux-headers-$(uname -r) to install linux kernel header I got the message shown in Kernel.png (attachment).
Kernel.png

I am facing problem when I try to compile and install DAHDI on my UBUNTU Server. It displays me the messages displayed in the attachments:
1.png

2.png

4.png

5.png

I am a newbie in this regard. Kindly help me figuring the problem out, and also guide me to the solution of the problem. It's a bit urgent!

Regards,
Nazish Kanwal

[Toz]

Duplicate threads merged. Please do not create duplicate threads, it dilutes community effort. Thank you.

[nazish.kanwal.cs]

Duplicate threads merged. Please do not create duplicate threads, it dilutes community effort. Thank you.

Thanks to moderator. Point well-noted!