使用CMAKE的QT MOC错误 [英] QT MOC error using CMAKE

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本文介绍了使用CMAKE的QT MOC错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试编写一个OpenCV应用程序，使用QT创建GUI并使用CMAKE生成makefile。我有的问题是，当我尝试执行make命令，我得到的错误：



#error这个文件是使用moc从5.2.1。它不能与这个版本的Qt的包含文件（该moc已经改变太多了。）



...所以我想我应该尝试使用moc从qt4而不是qt5这个（我有qt4和qt5安装）。确切的，我有/ usr / bin / moc-qt4以及/ usr / bin / moc，所以我想我所需要做的是 invoke sudo update-alternatives --config moc 但我得到的是 update-alternatives：error：no alternatives for moc 。嗯...



所以我认为问题是与版本的qt或在我的CMakeLists.txt，所以这里是我使用的代码：

  cmake_minimum_required（VERSION 2.8.9）
 project（Vigil）
 
 
 include_directories （
 build 
 src 
 inc 
 uis 
）
 
 ################ #########配置OpenCV包含内容######################## 
 
 FIND_PATH（CV_INCLUDE_DIR cv。 h 
 / usr / include / opencv 
）
 
 MESSAGE（状态OpenCV：CV路径：$ {CV_INCLUDE_DIR}）
 
 FIND_PATH（CVAUX_INCLUDE_DIR cvaux.h 
 / usr / include / opencv 
 / usr / local / include / opencv 
 / usr / local / include / opencv / cvaux / include 
 / usr / include / opencv / include 
）
 
 MESSAGE（状态OpenCV：CVAux路径：$ {CXCORE_INCLUDE_DIR}）
 
 FIND_PATH（CXCORE_INCLUDE_DIR cxcore.h 
 / usr / include / opencv 
 / usr / local / include / opencv 
 / usr / local / include / opencv / cxcore / include 
）
 
 MESSAGE状态OpenCV：CXCore路径：$ {CVAUX_INCLUDE_DIR}）
 
 FIND_PATH（HIGHGUI_INCLUDE_DIR highgui.h 
 / usr / include / opencv 
 / usr / local / include / opencv /其他的lib / highgui 
 / opt / local / include / opencv 
 / usr / local / include / opencv 
）
 
 MESSAGE（状态OpenCV：HighGUI Path： $ {HIGHGUI_INCLUDE_DIR}）
 
 FIND_LIBRARY（CV_LIB NAMES opencv_imgproc PATHS 
 / usr / lib 
 / usr / local / lib 
 / usr / lib64 
 / usr / local / lib64 
）
 
 MESSAGE（状态OpenCV：CV Lib：$ {CV_LIB}）
 
 FIND_LIBRARY（CXCORE_LIB NAMES opencv_core PATHS 
 / usr / lib 
 / usr / local / lib 
 / usr / lib64 
）
 
 MESSAGE（状态OpenCV：CXCore Lib：$ {CXCORE_LIB} ）
 
 FIND_LIBRARY（HIGHGUI_LIB NAMES opencv_highgui PATHS 
 / usr / lib 
 / usr / local / lib 
 / usr / lib64 
 / usr / local / lib64 
）
 
 MESSAGE（状态OpenCV：HighGUI Lib：$ {HIGHGUI_LIB}）
 
 INCLUDE_DIRECTORIES（
 $ {HIGHGUI_INCLUDE_DIR} 
 $ {OPENCV_INCLUDE_DIR} 
 $ {CXCORE_INCLUDE_DIR} 
 $ {CVAUX_INCLUDE_DIR} 
）
 
 ################ #########配置QT包含############################### 
 FIND_PACKAGE（Qt5Widgets）
 FIND_PACKAGE （Qt4 REQUIRED）
 include_directories（$ {QT_INCLUDES}）
 IF（QT4_FOUND）
 MESSAGE（状态QT found：YES）
 ELSE（QT4_FOUND）
 MESSAGE （FATAL_ERROR 
无法构建没有Qt4。请设置Qt4_DIR。）
 ENDIF（QT4_FOUND）
 
 #################添加源， headers和uis ######################### 
 
 set（SOURCES $ {SOURCES} 
 main.cpp 
 VigilWidget.cpp 
）
 
 SET（HEADERS $ {HEADERS} 
 VigilWidget.h 
）
 
 SET（UI_FILES 
 bugView.ui 
）
 
 
 ######################## Run UIC上的.ui文件######################### b＃
 $ b QT4_WRAP_UI（UI_HDRS $ {UI_FILES}）
 MESSAGE（状态UI_HEADERS：$ {UI_HDRS}）
＃，最后将运行moc：
＃QT4_AUTOMOC（$ {HEADERS}）
 QT4_WRAP_CPP（MOC_HEADERS $ {HEADERS}）
 
 ########################################### ###### 
 
 ADD_EXECUTABLE（Vigil $ {UI_HDRS} $ {SOURCES} $ {HEADERS} $ {QtApp_RCC_SRCS} $ {MOC_HEADERS}）
  / pre> 
 
 
我的源文件和头文件目前都是空的，但我也会发布它们，谁知道，也许错误是存在的。
 
 
 
 main.cpp：
  #include< iostream> 
 #includeVigilWidget.h
 //＃include< QApplication> 
 
 int main（int argc，char * argv []）{
 QApplication app（argc，argv）; 
 std :: cout<< 测试; 
 VigilWidget vigil; 
 vigil.show（）; 
} 
  
 VigilWidget.cpp：
  #includeVigilWidget.h
 
 VigilWidget :: VigilWidget（QWidget * parent）
：QWidget（parent）
 { 
 ui.setupUi（this）; 
} 
  
 VigilWidget.h：
  #ifndef _BGSUBTRACT_H_ 
 #define _BGSUBTRACT_H_ 
 
 #includeui_bugView.h
 //＃include< QObject> 
 
 class VigilWidget：public QWidget {
 Q_OBJECT 
 
 public：
 
私有插槽：
 
信号： 
 
私有插槽：
 
 private：
 
 Ui :: bugView ui; 
 
}; 
 #endif 
  
无论如何，我花了两天的最好的一部分，真的很感谢一些帮助！非常感谢！
解决方案
 Qt5配置：
  set（QT_VERSION_REQ5.2）
 find_package（Qt5Core $ {QT_VERSION_REQ} REQUIRED）
 find_package（Qt5Quick $ {QT_VERSION_REQ} REQUIRED）
 find_package（Qt5Widgets $ {QT_VERSION_REQ } REQUIRED）
 set（CMAKE_AUTOMOC ON）
 
 add_executable（$ {PROJECT_NAME} $ {SOURCES}）
 target_link_libraries（$ {PROJECT_NAME} 
 Qt5 :: Core 
 Qt5 :: Quick 
 Qt5 :: Widgets 
）
  
如果你可以更好地使用QtQuick而不是QWidgets。
 
I am trying to write an OpenCV application creating the GUI with QT and generating the makefiles using CMAKE. The problem that I have is that when I try to execute the "make" command, I get the error:



#error "This file was generated using the moc from 5.2.1. It cannot be used with the include files from this version of Qt. (The moc has changed too much.)"



Okay...so I guess I should be trying to use the moc from qt4 rather than qt5 for this (I have both qt4 and qt5 installed). Sure enough I have /usr/bin/moc-qt4 as well as /usr/bin/moc, so I would have thought all I need to do is invoke sudo update-alternatives --config moc, but all I get is update-alternatives: error: no alternatives for moc. Hmmm...



So I think the issue is either with the version of qt or in my CMakeLists.txt, so here is the code I used for that:
cmake_minimum_required(VERSION 2.8.9)
project (Vigil)


include_directories(
    build
    src
    inc
    uis
)

######################### Configure OpenCV inclusion ######################### 

    FIND_PATH(CV_INCLUDE_DIR cv.h
          /usr/include/opencv
          )

        MESSAGE(STATUS "OpenCV: CV Path : " ${CV_INCLUDE_DIR})

    FIND_PATH(CVAUX_INCLUDE_DIR cvaux.h
          /usr/include/opencv
          /usr/local/include/opencv
          /usr/local/include/opencv/cvaux/include
          /usr/local/include/opencv/include 
          )

    MESSAGE(STATUS "OpenCV: CVAux Path : " ${CXCORE_INCLUDE_DIR})

    FIND_PATH(CXCORE_INCLUDE_DIR cxcore.h
          /usr/include/opencv
          /usr/local/include/opencv
          /usr/local/include/opencv/cxcore/include
          )

    MESSAGE(STATUS "OpenCV: CXCore Path : " ${CVAUX_INCLUDE_DIR})

    FIND_PATH(HIGHGUI_INCLUDE_DIR highgui.h
          /usr/include/opencv
          /usr/local/include/opencv/otherlibs/highgui
          /opt/local/include/opencv
          /usr/local/include/opencv 
          )

    MESSAGE(STATUS "OpenCV: HighGUI Path : " ${HIGHGUI_INCLUDE_DIR})

    FIND_LIBRARY(CV_LIB NAMES opencv_imgproc PATHS
         /usr/lib
         /usr/local/lib
         /usr/lib64
         /usr/local/lib64
         )

    MESSAGE(STATUS "OpenCV: CV Lib: " ${CV_LIB})     

    FIND_LIBRARY(CXCORE_LIB NAMES opencv_core PATHS
         /usr/lib
         /usr/local/lib
         /usr/lib64
         )

    MESSAGE(STATUS "OpenCV: CXCore Lib: " ${CXCORE_LIB}) 

    FIND_LIBRARY(HIGHGUI_LIB NAMES opencv_highgui PATHS
         /usr/lib
         /usr/local/lib
         /usr/lib64
         /usr/local/lib64
         )

    MESSAGE(STATUS "OpenCV: HighGUI Lib: " ${HIGHGUI_LIB})      

    INCLUDE_DIRECTORIES(
        ${HIGHGUI_INCLUDE_DIR}
        ${OPENCV_INCLUDE_DIR}
        ${CXCORE_INCLUDE_DIR}
        ${CVAUX_INCLUDE_DIR}
        )

######################### Configure QT inclusion ######################### 
  FIND_PACKAGE(Qt5Widgets)
  FIND_PACKAGE(Qt4 REQUIRED)
  include_directories( ${QT_INCLUDES} )
  IF(QT4_FOUND)
    MESSAGE(STATUS "QT found : YES")
  ELSE(QT4_FOUND)
    MESSAGE(FATAL_ERROR
    "Cannot build without Qt4.  Please set Qt4_DIR.")
  ENDIF(QT4_FOUND)

######################### Add sources, headers and uis ######################### 

set(SOURCES ${SOURCES}
    main.cpp
    VigilWidget.cpp
)

SET( HEADERS ${HEADERS}
    VigilWidget.h
)

SET( UI_FILES
    bugView.ui
)


######################### Run UIC on .ui files #########################

QT4_WRAP_UI( UI_HDRS ${UI_FILES} )
MESSAGE(STATUS "UI_HEADERS: " ${UI_HDRS})
# and finally this will run moc:
#QT4_AUTOMOC(${HEADERS})
QT4_WRAP_CPP( MOC_HEADERS  ${HEADERS} )

#########################  ######################### 

ADD_EXECUTABLE(Vigil ${UI_HDRS} ${SOURCES} ${HEADERS} ${QtApp_RCC_SRCS} ${MOC_HEADERS})

My source and header files are pretty empty at the moment, but I will post them too. Who knows, maybe the error is there.



main.cpp:
#include <iostream>
#include "VigilWidget.h"
//#include <QApplication>

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    std::cout << "Testing";
    VigilWidget vigil;
    vigil.show();
}

VigilWidget.cpp:
    #include "VigilWidget.h"

    VigilWidget::VigilWidget(QWidget *parent)
        : QWidget(parent)
    {
        ui.setupUi(this);
    }

VigilWidget.h:
#ifndef _BGSUBTRACT_H_
#define _BGSUBTRACT_H_

#include "ui_bugView.h"
//#include <QObject>

class VigilWidget : public QWidget{
 Q_OBJECT

 public:

 private slots:

 signals:

 private slots:

 private:

 Ui::bugView ui;

};
#endif

Anyways, I have spent the best part of two days getting this far and would really really appreciate some help! Thanks a lot!
 解决方案 
Config for Qt5:
set(QT_VERSION_REQ "5.2")
find_package(Qt5Core ${QT_VERSION_REQ} REQUIRED)
find_package(Qt5Quick ${QT_VERSION_REQ} REQUIRED)
find_package(Qt5Widgets ${QT_VERSION_REQ} REQUIRED)
set(CMAKE_AUTOMOC ON)

add_executable(${PROJECT_NAME} ${SOURCES})
target_link_libraries(${PROJECT_NAME}
    Qt5::Core
    Qt5::Quick
    Qt5::Widgets     
)

And better use QtQuick instead of QWidgets if you can.


                        
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