MacOS Sierra - cmake failed with qt5

Question

I'm trying to build a cpp/qt5 project using cmake, but the compilation return an error regarding QT5.

I've installed QT5 with Homebrew,

When I do :

brew --prefix qt5

I get

 /usr/local/Cellar/qt5/5.6.0

---

So I'm in the build folder of my project, and I do :

cmake .. -DCMAKE_PREFIX_PATH=$(brew --prefix qt5) -G Xcode -DBUILD_TESTS=ON -DBUILD_TESTS_COVERAGE=off

Return me this error :

    CMake Error at CMakeLists.txt:124 (find_package):
  By not providing "FindQt5.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Qt5", but
  CMake did not find one.

  Could not find a package configuration file provided by "Qt5" with any of
  the following names:

    Qt5Config.cmake
    qt5-config.cmake

  Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
  to a directory containing one of the above files.  If "Qt5" provides a
  separate development package or SDK, be sure it has been installed.

the lines of errors in the CMakelist.txt :

    ## QT5 ##

find_package(Qt5 COMPONENTS Core Gui Widgets Concurrent Qml Quick REQUIRED)

set_target_properties(${BIN_NAME} PROPERTIES AUTOMOC ON)
set_target_properties(${BIN_NAME} PROPERTIES AUTOUIC ON)
target_link_libraries(${BIN_NAME} PUBLIC Qt5::Core PUBLIC Qt5::Widgets PUBLIC Qt5::Gui PUBLIC Qt5::Qml PUBLIC Qt5::Quick PUBLIC Qt5::Concurrent)

#########

---

I've also tried to add a -DQt5_DIR=$(brew --prefix qt5) to the command, same result.

---

Any ideas ? thanks

Answer 1

Try:

-DQt5_DIR=$(brew --prefix qt5)/lib/cmake/Qt5

Note that you can specify multiple properties when using set_target_properties, and specify PUBLIC scope for multiple values when using target_link_libraries:

set_target_properties(${BIN_NAME}
    PROPERTIES
    AUTOMOC ON
    AUTOUIC ON
)
target_link_libraries(${BIN_NAME}
    PUBLIC
    Qt5::Core
    Qt5::Widgets
    Qt5::Gui
    Qt5::Qml
    Qt5::Quick
    Qt5::Concurrent
)