How to find the Qt5 CMake module on Windows

Question

I'm trying to make a very basic Qt5 application using CMake on Windows. I used the documentation of Qt5 to use CMake, and my main.cpp file just contains a main function.

My CMakeLists.txt is exactly:

cmake_minimum_required(VERSION 2.8.9)  project(testproject)  # Find includes in corresponding build directories set(CMAKE_INCLUDE_CURRENT_DIR ON) # Instruct CMake to run moc automatically when needed. set(CMAKE_AUTOMOC ON)  # Find the QtWidgets library find_package(Qt5Widgets)  # Tell CMake to create the helloworld executable add_executable(helloworld hello.cpp)  # Use the Widgets module from Qt 5. qt5_use_modules(helloworld Widgets) 

When in MSysGit bash I enter

$ cmake -G"Visual Studio 11" 

I get this output:

$ cmake -G"Visual Studio 11" -- The C compiler identification is MSVC 17.0.60204.1 -- The CXX compiler identification is MSVC 17.0.60204.1 -- Check for working C compiler using: Visual Studio 11 -- Check for working C compiler using: Visual Studio 11 -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working CXX compiler using: Visual Studio 11 -- Check for working CXX compiler using: Visual Studio 11 -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done CMake Warning at CMakeLists.txt:11 (find_package):   By not providing "FindQt5Widgets.cmake" in CMAKE_MODULE_PATH this project   has asked CMake to find a package configuration file provided by   "Qt5Widgets", but CMake did not find one.    Could not find a package configuration file provided by "Qt5Widgets" with   any of the following names:      Qt5WidgetsConfig.cmake     qt5widgets-config.cmake    Add the installation prefix of "Qt5Widgets" to CMAKE_PREFIX_PATH or set   "Qt5Widgets_DIR" to a directory containing one of the above files.  If   "Qt5Widgets" provides a separate development package or SDK, be sure it has   been installed.   CMake Error at CMakeLists.txt:17 (qt5_use_modules):   Unknown CMake command "qt5_use_modules".   -- Configuring incomplete, errors occurred! 

Do you have any ideas?

Answer 1

After the lines

cmake_minimum_required(VERSION 2.8.9)  project(testproject) 

add

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

This solves the problem.