c++ - MacOS Sierra - cmake 因 qt5 而失败

Question

我正在尝试使用 cmake 构建 cpp/qt5 项目，但编译返回有关 QT5 的错误。

我用 Homebrew 安装了 QT5，

当我这样做时:

brew --prefix qt5

我明白了

 /usr/local/Cellar/qt5/5.6.0

---

所以我在项目的 build 文件夹中，我这样做:

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

给我返回这个错误:

    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.

CMakelist.txt 中的错误行:

    ## 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)

#########

---

我还尝试在命令中添加 -DQt5_DIR=$(brew --prefix qt5)，结果相同。

---

有什么想法吗？ 谢谢

Answer 1

尝试:

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

请注意，您可以在使用set_target_properties 时指定多个属性，并在使用target_link_libraries 时为多个值指定PUBLIC 范围:

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
)