I tried to build source code that uses Qt5 using CMake. It quit with this error:
CMake Error at CMakeLists.txt:20 (find_package): By not providing "FindQt5Core.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "Qt5Core", but CMake did not find one. Could not find a package configuration file provided by "Qt5Core" with any of the following names: Qt5CoreConfig.cmake qt5core-config.cmake Add the installation prefix of "Qt5Core" to CMAKE_PREFIX_PATH or set "Qt5Core_DIR" to a directory containing one of the above files. If "Qt5Core" provides a separate development package or SDK, be sure it has been installed.
I checked for Qt5 packages and they seemed to be installed. There has been a naming change between Qt4 and Qt5 packages in Ubuntu and that threw me off.
What was needed is the package
qtbase5-dev. Once I installed it, this error was solved:
$ sudo apt install qtbase5-dev
Tried with: Ubuntu 14.04