I downloaded Komparator source from this page. The INSTALL file in the source say the following:

Unpack komparator4-xxx.tar.bz2, and open a shell inside this directory

mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=`kde4-config --prefix` ..
make
sudo make install

I unpacked the file, make the directory, entered this, but when I have tried to cmake (sentece Nº3) the terminal print the following errors disabling me to make & install:

CMake Error at /usr/share/cmake-2.8/Modules/FindKDE4.cmake:98 (MESSAGE):
  ERROR: cmake/modules/FindKDE4Internal.cmake not found in
  /home/lucio/.kde/share/apps;/usr/share/kde4/apps
Call Stack (most recent call first):
  CMakeLists.txt:2 (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 2.8)

  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!

What mean this errors and how can I fix it?