Add the installation prefix of “Qt5Widgets” to CMAKE_PREFIX_PATH

Question

I don\'t know a lot about cmake, I\'m trying to build a client using cmake and Qt. Getting the following error:

CMake Error at alethzero/CMakeLists.tx

Answer 1

at an Ubuntu 16.04.4 LTS desktop the solution was

cmake .. -DMAKE_PREFIX_PATH=/usr/include/x86_64-linux-gnu/qt5

Answer 2

I needed this on my macOS after Qt installation with brew install qt5:

export CMAKE_PREFIX_PATH=/usr/local/Cellar/qt5/5.7.0/

Answer 3

For ubuntu: cmake -DCMAKE_PREFIX_PATH=/home/ryan/Qt/5.11.2/gcc_64 ..

/home/ryan/Qt/ is the Qt installation root path

Answer 4

Well, here you have a solution for Windows: How to find qt5 CMake module on windows

set (CMAKE_PREFIX_PATH "C:\\Qt\\Qt5.0.1\\5.0.1\\msvc2010\\")

For your environment, I think you will have to change the path where Qt is located...

Maybe this will help you:
https://github.com/Cockatrice/Cockatrice/issues/205

Answer 5

This is documented:

http://doc.qt.io/qt-5/cmake-manual.html

The easiest way to use CMake is to set the CMAKE_PREFIX_PATH 
environment variable to the install prefix of Qt 5

Do this

export CMAKE_PREFIX_PATH=/home/user/Programs/<other_stuff>

where references the compiler etc, so that this complete path is valid:

/home/user/Programs/<other_stuff>/bin/qmake*