When I run this: cmake -DCMAKE_BUILD_TYPE=debugfull -DCMAKE_INSTALL_PREFIX=`kde4-config --prefix` ..
I'm receiving the following error:

Starting CMake configuration for: digikam-software-collection
CMake Error at CMakeLists.txt:19 (find_package):
Could not find a package configuration file provided by "ECM" (requested
version 1.5.0) with any of the following names:

ECMConfig.cmake
ecm-config.cmake

Add the installation prefix of "ECM" to CMAKE_PREFIX_PATH or set "ECM_DIR"
to a directory containing one of the above files. If "ECM" provides a
separate development package or SDK, be sure it has been installed.


I've already downloaded extra-cmake-modules in build folder. What should I do now?

And what exactly are you trying to build? Would be nice to have more information, especially also what your plasma installation is ...

I'm trying to build digiKam.

KUbuntu 15.10
KDE Plasma Version : 5.4.2