cmake Warning (dev) in CMcakeList.txt

I'm currently dual booting Slackware 14.2 xfce on one HDD with Devuan xfce on another HDD.

I am trying to install Kaffeine into a Slackware14.2 xfce desktop, but it fails. Which is strange because Kafeine has no problem in the Devuan HDD

The install into Slackware gives the folowing warning

Code:-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Error at /usr/share/cmake-3.5/Modules/FindKDE4.cmake:71 (message):
ERROR: Could not find KDE4 kde4-config
Call Stack (most recent call first):
CMakeLists.txt:5 (find_package)

CMake Warning (dev) in CMakeLists.txt:
No cmake_minimum_required command is present. A line of code such as

cmake_minimum_required(VERSION 3.5)

should be added at the top of the file. The version specified may be lower
if you wish to support older CMake versions for this project. For more
information run "cmake --help-policy CMP0000".
This warning is for project developers. Use -Wno-dev to suppress it.

-- Configuring incomplete, errors occurred!
See also "/tmp/SBo/kaffeine-1.3.1/build/CMakeFiles/CMakeOutput.log".

kaffeine:
Would you like to continue processing the rest of the
queue or would you like to abort? If this failed
package is a dependency of another package in the queue
then it may not make sense to continue.

(Y)es to continue, (N)o to abort, (R)etry the build?: nThe CMakeOutput.log is 520 lines, which I feel is too long to list here.

What I would like to know is what I need to amend to install Kaffeine, or an equal program.

I have tried Cinelerra, but the computer will not communicate the usb device.