Unable to install dahdi-linux-complete

[root@strange dahdi-linux-complete-2.11.1+2.11.1]# make all
make -C linux all
make[1]: Entering directory /root/asterisk/dahdi-linux-complete-2.11.1+2.11.1/linux' make -C drivers/dahdi/firmware firmware-loaders make[2]: Entering directory/root/asterisk/dahdi-linux-complete-2.11.1+2.11.1/linux/drivers/dahdi/firmware’
make[2]: Leaving directory /root/asterisk/dahdi-linux-complete-2.11.1+2.11.1/linux/drivers/dahdi/firmware' You do not appear to have the sources for the 3.10.0-862.14.4.el7.x86_64 kernel installed. make[1]: *** [modules] Error 1 make[1]: Leaving directory/root/asterisk/dahdi-linux-complete-2.11.1+2.11.1/linux’
make: *** [all] Error 2
[root@strange dahdi-linux-complete-2.11.1+2.11.1]# make install
make -C linux all
make[1]: Entering directory /root/asterisk/dahdi-linux-complete-2.11.1+2.11.1/linux' make -C drivers/dahdi/firmware firmware-loaders make[2]: Entering directory/root/asterisk/dahdi-linux-complete-2.11.1+2.11.1/linux/drivers/dahdi/firmware’
make[2]: Leaving directory /root/asterisk/dahdi-linux-complete-2.11.1+2.11.1/linux/drivers/dahdi/firmware' You do not appear to have the sources for the 3.10.0-862.14.4.el7.x86_64 kernel installed. make[1]: *** [modules] Error 1 make[1]: Leaving directory/root/asterisk/dahdi-linux-complete-2.11.1+2.11.1/linux’
make: *** [all] Error 2
above the error I got. I am using centos Develoment sever
any help would be appreciated.

This question was answered within the last week.

yes sir I did but same process didn’t work.

If you ask the same question, you will generally get the same answer.

If you ask the same question in a new thread, without giving the history, you will annoy people who can’t be sure that the previous thread was yours, and have to start getting all the facts again.

yes You are right I am sorry for that to get you confuse,