Humongous thanks to all of you active on here and a thanks in advance to those that help me figure this out!

So to get to the point, I've got a little bit of an issue with my compilation with Cmake of ArpOn 3.0-ng on Kali 2017.1 (not updated, org install). Running under my normal user that I su on.

Installed Cmake, libpcap, libnet1 by myself and the cmake .. recognizes them. When I got the error and I verified that I had Libdnet already installed I installed Libdnet-dev but the problem still persists.

Pasting my terminal window as of where I'm getting stuck below.

root@****:~/ArpON-3.0-ng/build# cmake ..
-- Building ArpON for Operating System: GNU/Linux
-- Build type: Release
-- Found library: Pthreads
-- Found library: Librt
-- Found library: Libpcap
-- Found library: Libnet1
CMake Error at cmake/modules/FindLibdnet.cmake:86 (message):
Could not find Libdnet! Please see in the ArpON 'README' file.
Call Stack (most recent call first):
CMakeLists.txt:104 (find_package)


-- Configuring incomplete, errors occurred!
See also "/root/ArpON-3.0-ng/build/CMakeFiles/CMakeOutput.log".
root@****:~/ArpON-3.0-ng/build# cd
root@****:~# apt-get install libdnet
Reading package lists... Done
Building dependency tree
Reading state information... Done
libdnet is already the newest version (2.65).
0 upgraded, 0 newly installed, 0 to remove and 1173 not upgraded.
root@****:~# Could not find Libdnet! Please see in the ArpON 'README' file.
bash: Could: command not found
root@****:~# apt-get install libdnet-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libdnet-dev is already the newest version (2.65).
0 upgraded, 0 newly installed, 0 to remove and 1173 not upgraded.

I would check out line 86 of FindLibdnet.cmake, and see the ArpON README file, as indicated in the message. And, you don't have to build ArpON. It's in the repos.