CLion和Qt5：调整qmake

Question

我有其他地方介绍的设置，例如here。我在系统范围内安装了Qt5，并在我的CMakeLists.txt中添加必要的行。我的IDE是Clion。在我添加Q_OBJECT宏之前，简单的GUI中的所有功能都可以正常运行（我希望这将信号连接至插槽）。现在，当我这样做时，我得到了undefined reference to vtable型错误，也可以在网上找到大量。我感到困惑的是，有人建议在您的项目中使用Qt5捆绑cmake，从本质上讲，这意味着“仅用于GUI”，我需要更改工具链。但是实际上，有人对此什么也没说。所有人都说那是>>

每次添加/删除Q_OBJECT时Qt运行qmake

现在，如何在我的CMakeLists.txt中捕获它？ -其相关部分如下。我在moc里面看到了qmake和/usr/lib/qt5/bin；那么如何将此传达给CLion？

# ----- 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)
不要介意冗长的注释；我最初的GUI培训是在Java Swing中，我发现它们很有用。

编辑：帮助我的是qt5_wrapper_cppQt 5 cmake fails with undefined reference to vtable on hello world with inc & src as subdirs

我有其他地方介绍的设置，例如这里。我在系统范围内安装了Qt5，并且在CMakeLists.txt中具有必要的行。我的IDE是Clion。直到我...

Answer 1

Q_OBJECT宏需要代码生成。这就是为什么您有undefined reference个例外。我不记得确切如何为Qt配置cmake项目，但我建议阅读https://cmake.org/cmake/help/latest/manual/cmake-qt.7.html。