title: How to change qtconfig option in 'cmake' to qtconfig4?
body: <p>While configuring krita, I am getting a <code>cmake</code> error saying <code>Unable to compile a basic Qt application.  Qt has not been found correctly.</code> I think the reason is there is a conflict between the QT5 and QT4 dev packages. What to do?</p>
  
  <pre><code>sricharan@sricharan-Lenovo-Z580:~/kde4/build$ sudo cmake -DCMAKE_INSTALL_PREFIX=$HOME/kde4/inst $HOME/kde4/src/calligra -DCMAKE_BUILD_TYPE=RelWithDebInfo -DPRODUCTSET=KRITA
  -- The C compiler identification is GNU 4.8.2
  -- The CXX compiler identification is GNU 4.8.2
  -- Check for working C compiler: /usr/bin/cc
  -- Check for working C compiler: /usr/bin/cc -- works
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working CXX compiler: /usr/bin/c++
  -- Check for working CXX compiler: /usr/bin/c++ -- works
  -- Detecting CXX compiler ABI info
  -- Detecting CXX compiler ABI info - done
  -- Calligra version: 2.9 Pre-Alpha
  -- Release build: TRUE
  -- -------------------------------------------------------------------
  -- Configured with product set "KRITA"
  -- -------------------------------------------------------------------
  -- Looking for Q_WS_X11
  -- Looking for Q_WS_X11 - not found
  -- Looking for Q_WS_WIN
  -- Looking for Q_WS_WIN - not found
  -- Looking for Q_WS_QWS
  -- Looking for Q_WS_QWS - not found
  -- Looking for Q_WS_MAC
  -- Looking for Q_WS_MAC - not found
  -- Found Qt-Version 5.2.1 (using /usr/bin/qmake)
  -- Looking for include file pthread.h
  -- Looking for include file pthread.h - found
  -- Looking for pthread_create
  -- Looking for pthread_create - not found
  -- Looking for pthread_create in pthreads
  -- Looking for pthread_create in pthreads - not found
  -- Looking for pthread_create in pthread
  -- Looking for pthread_create in pthread - found
  -- Found Threads: TRUE  
  -- Found Automoc4: /usr/bin/automoc4  
  -- Found Perl: /usr/bin/perl (found version "5.18.2") 
  -- Found Phonon: /usr/include (Required is at least version "4.3.80") 
  -- Performing Test _OFFT_IS_64BIT
  -- Performing Test _OFFT_IS_64BIT - Success
  -- Performing Test HAVE_FPIE_SUPPORT
  -- Performing Test HAVE_FPIE_SUPPORT - Success
  -- Performing Test __KDE_HAVE_W_OVERLOADED_VIRTUAL
  -- Performing Test __KDE_HAVE_W_OVERLOADED_VIRTUAL - Success
  -- Performing Test __KDE_HAVE_GCC_VISIBILITY
  -- Performing Test __KDE_HAVE_GCC_VISIBILITY - Success
  CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
  Please set them or make sure they are set and tested correctly in the CMake files:
  QT_QT_INCLUDE_DIR
     used as include directory in directory /home/sricharan/kde4/build/CMakeFiles/CMakeTmp
  
  CMake Error: Internal CMake error, TryCompile configure of cmake failed
  
  CMake Error at /usr/share/kde4/apps/cmake/modules/FindKDE4Internal.cmake:1311 (message):
    Unable to compile a basic Qt application.  Qt has not been found correctly.
  Call Stack (most recent call first):
    /usr/share/cmake-2.8/Modules/FindKDE4.cmake:95 (find_package)
    CMakeLists.txt:146 (find_package)
  
  
  -- Configuring incomplete, errors occurred!
  </code></pre>
  
  <p>I am not sure, but maybe the reason is that it QT5 but KDE4 requires QT4. I have installed required <code>libqt4</code> libraries  but that won't help. What should I do?</p>
  
  <p>Please tell me if I am inferring the errors in a wrong way.</p>