CLion和Qt5:调优qmake

Question

正如其他地方所解释的，我有一个设置，例如这里。我在系统范围内安装了Qt5，并且在我的CMakeLists.txt中有必要的行。我的IDE是克里恩。在添加Q_OBJECT宏之前，简单GUI中的一切都很好(我希望这样可以将信号连接到插槽)。现在，当我这样做的时候，我得到了undefined reference to vtable-type错误，这也是在网上大量发现的。我的困惑源于这样一个事实，即有些人建议在项目中使用Qt5-bundled cmake，这实质上意味着“只用于GUI”，我需要更改工具链。但实际上有些人对此只字未提。大家都说的是

每次添加/删除Q_OBJECT时qmake运行qmake

现在，如何在我的CMakeLists.txt中捕捉到这一点？--下面给出了相关的部分。我见过moc和qmake在/usr/lib/qt5/bin中；那么如何与CLion沟通

# ----- GUI part -----
# Qt5 inclusion
# The meta object compiler is one of the core functionality of Qt, it reads a C++ header file and if it finds a
# Q_OBJECT macro, it will produces a C++ source file containing meta object code for the class.
# It's the mechanism that allow signal and slots to work.
set(CMAKE_INCLUDE_CURRENT_DIR ON)
# set(CMAKE_PREFIX_PATH $ENV{QT_DIR}/$ENV{QT_VERSION}/gcc_64/lib/cmake)
set(CMAKE_PREFIX_PATH /usr/lib/qt5/bin/)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
# Enable user interface compiler (UIC)
# The user interface compiler is a program that read XML from the .ui file
# generated by Qt Interface Designer and generate C++ code from it.
set(CMAKE_AUTOUIC ON)

if(CMAKE_VERSION VERSION_LESS "3.7.0")
    set(CMAKE_INCLUDE_CURRENT_DIR ON)
endif()

set(CMAKE_MODULE_PATH /usr/lib/qt5)
# @see: https://stackoverflow.com/questions/51994603/cmake-qt5-undefined-reference-to-qprinterqprinterqprinterprintermode
SET(QT5_MODULES Widgets PrintSupport)
find_package(Qt5 COMPONENTS ${QT5_MODULES} REQUIRED)

add_subdirectory(${PROJECT_SOURCE_DIR}/extern/qcustomplot)
add_executable(gui
        ${PROJECT_SOURCE_DIR}/gui/main.cpp
        ${PROJECT_SOURCE_DIR}/extern/qcustomplot/qcustomplot.cpp)
set_target_properties(gui PROPERTIES LINKER_LANGUAGE CXX)
target_link_libraries(gui
        PUBLIC
        Qt5::Core Qt5::Widgets qcustomplot)

不要在意冗长的注释；我最初的GUI培训是在Java Swing中进行的，我发现它们很有用。

编辑:帮助我的是qt5_wrapper_cpp在Qt5cmake在没有定义的引用中失败，在hello world上引用vtable，将inc & src作为子目录。中提到的事情

Answer 1

Q_OBJECT宏需要生成代码。这就是为什么您有undefined reference异常。我不记得如何为Qt配置cmake项目，但我建议您阅读https://cmake.org/cmake/help/latest/manual/cmake-qt.7.html。

像set_target_properties(${PROJECT_NAME} PROPERTIES AUTOMOC TRUE)这样的东西应该能帮助你。