错误：没有为架构x86_64找到符号，collect2：ld返回1退出状态 [英] Error: symbol(s) not found for architecture x86_64, collect2: ld returned 1 exit status

问题描述

我在Qt上遇到了一个问题。

这是我的代码：

hexbutton.h：

  #ifndef HEXBUTTON_H 
 #define HEXBUTTON_H 
 
 #include< ; QPushButton> 
 #include< QWidget> 
 #include< QIcon> 
 
 class HexButton：public QPushButton 
 {
 Q_OBJECT 
 
 public：
 HexButton（QWidget * parent，QIcon& amp; amp; amp; ，int j）; 
 
 public slots：
 void changeIcon（）; 
}; 
 
 #endif // HEXBUTTON_H 
  

Hexbutton.cpp：

  #includehexbutton.h
 
 HexButton :: HexButton（QWidget * parent，QIcon& i，int j）：QPushButton（parent）{
 // setFlat（true）; 
 setIcon（icon）; 
 setGeometry（（i * 40）+（（j * 40）/ 2），j * 40,40,40） 
} 
 
 void HexButton :: changeIcon（）{
 setIcon（QIcon（/ Users / jonathanbibas / Documents / Workspace Qt / Test / hexagon.gif））; 
} 
  

MyWindow.h：

  #ifndef MYWINDOW_H 
 #define MYWINDOW_H 
 
 #include< QApplication> 
 #include< QWidget> 
 #include& lt; QPushButton> 
 #include< QLCDNumber> 
 #include< QSlider> 
 #include< QProgressBar> 
 #includehexbutton.h
 
 
 
类MyWindow：public QWidget 
 {
 
 public：
 MyWindow（）; 
〜MyWindow（）; 
 
私人：
 HexButton * myButtons [11] [11]; 
}; 
 
 
 
 #endif // MYWINDOW_H 
  

MyWindow.cpp：

  #includeMyWindow.h
 #include< QColor> 
 #include< QIcon> 
 
 
 MyWindow :: MyWindow（）：QWidget（）{
 
 
 setFixedSize（740，440）; 
 
 QIcon icon = QIcon（/ Users / jonathanbibas / Documents / Workspace Qt / Test / whitehexagon.png）; 
 
 for（int i = 0; i <11; i ++）{
 for（int j = 0; j <11; j ++）{
 
 
 myButtons [i] [j] = new HexButton（this，icon，i，j）; 
 
 QObject :: connect（myButtons [i] [j]，SIGNAL（clicked（）），myButtons [i] [j]，SLOT（changeIcon（））） 
} 
} 
} 
 
 
 
 MyWindow ::〜MyWindow（）
 {
 delete myButtons; 
 
} 
  

最后，Main.cpp：

  #include< QApplication> 
 #includeMyWindow.h
 
 
 int main（int argc，char * argv []）
 {
 QApplication app（argc，argv ）; 
 
 MyWindow fenetre; 
 fenetre.show（）; 
 
 return app.exec（）; 
} 
  

为了防万一，这里是Test.pro

  SOURCES + = \ 
 Main.cpp \ 
 MyWindow.cpp \ 
 hexbutton.cpp 
 
 HEADERS + = \ 
 MyWindow.h \ 
 hexbutton.h 
  

b $ b

我得到两个错误：

1）没有为架构x86_64找到符号

2）collect2：ld退回1退出状态

它还说了121次（11 * 11）：

$ b b

Object :: connect：没有这样的槽QPushButton :: changeIcon（）in ../ Test / MyWindow.cpp：19

说：

  18:22:15：为项目运行构建步骤Test ... 
 18:22:15 ：配置不变，跳过qmake步骤。 
 18:22:15：Starting：/ usr / bin / make-w 
 make：输入目录`/ Users / jonathanbibas / Documents / Workspace Qt / Test-build-desktop-Desktop_Qt_4_8_0_for_GCC__Qt_SDK__Debug'
 g ++ -c -pipe -g -gdwarf-2 -arch x86_64 -Xarch_x86_64 -mmacosx-version-min = 10.5 -Wall -W -DQT_GUI_LIB -DQT_CORE_LIB -I ../../../ QtSDK / Desktop / Qt / 4.8.0 / gcc / mkspecs / macx-g ++ -I ../ Test -I ../../../ QtSDK / Desktop / Qt / 4.8.0 / gcc / lib / QtCore.framework /版本/ 4 / Headers -I ../../../ QtSDK / Desktop / Qt / 4.8.0 / gcc / include / QtCore -I ../../../ QtSDK / Desktop / Qt / 4.8.0 / gcc / lib / QtGui.framework / Versions / 4 / Headers -I ../../../ QtSDK / Desktop / Qt / 4.8.0 / gcc / include / QtGui -I ../../../ QtSDK / Desktop / Qt / 4.8.0 / gcc / include -I。 -I ../ Test -I。 -F / Users / jonathanbibas / QtSDK / Desktop / Qt / 4.8.0 / gcc / lib -o hexbutton.o ../Test/hexbutton.cpp 
 g ++ -headerpad_max_install_names -arch x86_64 -Xarch_x86_64 -mmacosx-version- min = 10.5 -o Test.app/Contents/MacOS/Test Main.o MyWindow.o hexbutton.o moc_MyWindow.o -F / Users / jonathanbibas / QtSDK / Desktop / Qt / 4.8.0 / gcc / lib -L ​​/ Users /jonathanbibas/QtSDK/Desktop/Qt/4.8.0/gcc/lib -framework QtGui -framework QtCore 
架构x86_64的未定义符号：
vtable for HexButton，引用：
 HexButton :: hexbutton.o 
中的HexButton（QWidget *，QIcon& amp; int，int）in hexbutton.o 
注意：缺少vtable通常意味着第一个非内联虚函数成员函数没有定义。 
 ld：未找到用于架构x86_64的符号
 collect2：ld返回1退出状态
 make：*** [Test.app/Contents/MacOS/Test]错误1 
 make：离开目录`/ Users / jonathanbibas / Documents / Workspace Qt / Test-build-desktop-Desktop_Qt_4_8_0_for_GCC__Qt_SDK__Debug'
 18:22:20：进程/ usr / bin / make退出代码2。 
构建项目时出错测试（目标：桌面）
执行生成步骤'Make'
  

$ b b

显然，错误来自Q_OBJECT（需要为插槽定义），但有一些问题，我的代码，而不是与我的编译器（因为我有，当槽在MainWindow，它工作正常）。

感谢您的帮助！

解决方案

面对同样的问题

1. 我的信号未定义的引用错误。


2. 将Q_OBJECT宏... vtable错误。
   

我这样做了并为我工作

• 添加了Q_OBJECT


• 清除项目


• Ran qmake


• 重建






它编译得很好。




I have been struggling for a while with an issue on Qt.

Here is my code:

hexbutton.h:

#ifndef HEXBUTTON_H
#define HEXBUTTON_H

#include <QPushButton>
#include <QWidget>
#include <QIcon>

class HexButton : public QPushButton
{
    Q_OBJECT

public:
    HexButton(QWidget *parent, QIcon &icon, int i, int j);

public slots:
    void changeIcon();
};

#endif // HEXBUTTON_H

Hexbutton.cpp:

#include "hexbutton.h"

HexButton::HexButton(QWidget *parent, QIcon &icon, int i , int j) : QPushButton(parent){
    //setFlat(true);
    setIcon(icon);
    setGeometry((i*40)+((j*40)/2), j*40, 40, 40);
}

void HexButton::changeIcon(){
        setIcon(QIcon("/Users/jonathanbibas/Documents/Workspace Qt/Test/hexagon.gif"));
}

MyWindow.h:

#ifndef MYWINDOW_H
#define MYWINDOW_H

#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QLCDNumber>
#include <QSlider>
#include <QProgressBar>
#include "hexbutton.h"



class MyWindow : public QWidget
{

public:
    MyWindow();
    ~MyWindow();

private:
    HexButton * myButtons[11][11];
};



#endif // MYWINDOW_H

MyWindow.cpp:

#include "MyWindow.h"
#include <QColor>
#include <QIcon>


MyWindow::MyWindow() : QWidget() {


    setFixedSize(740, 440);

    QIcon icon = QIcon("/Users/jonathanbibas/Documents/Workspace Qt/Test/whitehexagon.png");

    for(int i =0 ; i < 11 ; i ++){
        for(int j =0 ; j < 11 ; j ++){


            myButtons[i][j] = new HexButton(this, icon, i, j);

            QObject::connect(myButtons[i][j], SIGNAL(clicked()), myButtons[i][j], SLOT(changeIcon()));
        }
    }
}



MyWindow::~MyWindow()
{
    delete myButtons;

}

And finally, Main.cpp:

#include <QApplication>
#include "MyWindow.h"


int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

        MyWindow fenetre;
        fenetre.show();

        return app.exec();
}

Just in case, here is the Test.pro

SOURCES += \
    Main.cpp \
    MyWindow.cpp \
    hexbutton.cpp

HEADERS += \
    MyWindow.h \
    hexbutton.h

And I get the 2 errors:

1) symbol(s) not found for architecture x86_64

2) collect2: ld returned 1 exit status

It also says 121 times (11*11):

Object::connect: No such slot QPushButton::changeIcon() in ../Test/MyWindow.cpp:19

and on the compile output it says:

18:22:15: Running build steps for project Test...
18:22:15: Configuration unchanged, skipping qmake step.
18:22:15: Starting: "/usr/bin/make" -w
make: Entering directory `/Users/jonathanbibas/Documents/Workspace Qt/Test-build-desktop-Desktop_Qt_4_8_0_for_GCC__Qt_SDK__Debug'
g++ -c -pipe -g -gdwarf-2 -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -Wall -W -DQT_GUI_LIB -DQT_CORE_LIB -I../../../QtSDK/Desktop/Qt/4.8.0/gcc/mkspecs/macx-g++ -I../Test -I../../../QtSDK/Desktop/Qt/4.8.0/gcc/lib/QtCore.framework/Versions/4/Headers -I../../../QtSDK/Desktop/Qt/4.8.0/gcc/include/QtCore -I../../../QtSDK/Desktop/Qt/4.8.0/gcc/lib/QtGui.framework/Versions/4/Headers -I../../../QtSDK/Desktop/Qt/4.8.0/gcc/include/QtGui -I../../../QtSDK/Desktop/Qt/4.8.0/gcc/include -I. -I../Test -I. -F/Users/jonathanbibas/QtSDK/Desktop/Qt/4.8.0/gcc/lib -o hexbutton.o ../Test/hexbutton.cpp
g++ -headerpad_max_install_names -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -o Test.app/Contents/MacOS/Test Main.o MyWindow.o hexbutton.o moc_MyWindow.o   -F/Users/jonathanbibas/QtSDK/Desktop/Qt/4.8.0/gcc/lib -L/Users/jonathanbibas/QtSDK/Desktop/Qt/4.8.0/gcc/lib -framework QtGui -framework QtCore 
Undefined symbols for architecture x86_64:
  "vtable for HexButton", referenced from:
      HexButton::HexButton(QWidget*, QIcon&, int, int)in hexbutton.o
      HexButton::HexButton(QWidget*, QIcon&, int, int)in hexbutton.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make: *** [Test.app/Contents/MacOS/Test] Error 1
make: Leaving directory `/Users/jonathanbibas/Documents/Workspace Qt/Test-build-desktop-Desktop_Qt_4_8_0_for_GCC__Qt_SDK__Debug'
18:22:20: The process "/usr/bin/make" exited with code 2.
Error while building project Test (target: Desktop)
When executing build step 'Make'

Apparently the error comes from the Q_OBJECT (needed for the slots definition), but there is something wrong with my code, not with my compiler (because I have when slots are in MainWindow, it works fine).

Thank you for your help!

解决方案

Faced same problem

1. undefined refrence error for my signal.
2. After putting Q_OBJECT macro... vtable errors.

I did this and worked for me

• Added Q_OBJECT to file
• Cleaned project
• Ran qmake
• Rebuild

it compiles fine.

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