`Counter :: metaObject（）const'的多重定義

Question

moc_mm.o: In function `Counter::metaObject() const': 
moc_mm.cpp:(.text+0x0): multiple definition of `Counter::metaObject() const' 
moc_joystick.o:moc_joystick.cpp:(.text+0x0): first defined here 
moc_mm.o:(.rodata+0x0): multiple definition of `Counter::staticMetaObject' 

我應該在這裏給出哪部分代碼w.r.t這個錯誤？
這是什麼錯誤的含義是什麼？

我已經做了使清潔，但這並不能幫助。函數名元對象似乎是內部的Qt。

編輯1：
添加頭文件：

#include <stdio.h> 
#include <QObject> 
#ifndef __JOYSTICK_H__ 
#define __JOYSTICK_H__ 

#define JOYSTICK_DEVNAME "/dev/input/js0" 

#define JS_EVENT_BUTTON   0x01 /* button pressed/released */ 
#define JS_EVENT_AXIS   0x02 /* joystick moved */ 
#define JS_EVENT_INIT   0x80 /* initial state of device */ 


struct js_event { 
    unsigned int time; /* event timestamp in milliseconds */ 
    short value; /* value */ 
    unsigned char type;  /* event type */ 
    unsigned char number; /* axis/button number */ 
}; 

struct wwvi_js_event { 
    int button[11]; 
    int stick_x; 
    int stick_y; 
}; 

class Counter : public QObject 
{ 
    Q_OBJECT 
    private: 
     int m_value; 

    public: 
     Counter() { m_value = 0; } 

     int value() const { return m_value; } 

    //public slots: 
     int open_joystick(); 
     int read_joystick_event(struct js_event *jse); 
     //void set_joystick_y_axis(int axis); 
     //void set_joystick_x_axis(int axis); 
     void close_joystick(); 
     int get_joystick_status(struct wwvi_js_event *wjse); 

    //signals: 
     //void valueChanged(int newValue); 
}; 
#endif 

輸出：

anisha@linux-dopx:~/Desktop/anishaJoystick> qmake -project 
anisha@linux-dopx:~/Desktop/anishaJoystick> qmake 
anisha@linux-dopx:~/Desktop/anishaJoystick> make 
g++ -m64 -Wl,-O1 -Wl,-rpath,/home/anisha/qtsdk-2010.05/qt/lib -o anishaJoystick joy.o mm.o moc_joystick.o moc_mm.o -L/home/anisha/qtsdk-2010.05/qt/lib -lQtGui -L/home/anisha/qtsdk-2010.05/qt/lib -L/usr/X11R6/lib64 -lQtCore -lpthread 
moc_mm.o: In function `Counter::metaObject() const': 
moc_mm.cpp:(.text+0x0): multiple definition of `Counter::metaObject() const' 
moc_joystick.o:moc_joystick.cpp:(.text+0x0): first defined here 
moc_mm.o:(.rodata+0x0): multiple definition of `Counter::staticMetaObject' 
moc_joystick.o:(.rodata+0x0): first defined here 
moc_mm.o: In function `Counter::qt_metacast(char const*)': 
moc_mm.cpp:(.text+0x20): multiple definition of `Counter::qt_metacast(char const*)' 
moc_joystick.o:moc_joystick.cpp:(.text+0x30): first defined here 
moc_mm.o: In function `Counter::valueChanged(int)': 
moc_mm.cpp:(.text+0x70): multiple definition of `Counter::valueChanged(int)' 
mm.o:mm.cpp:(.text+0x10): first defined here 
moc_mm.o: In function `Counter::qt_metacall(QMetaObject::Call, int, void**)': 
moc_mm.cpp:(.text+0xb0): multiple definition of `Counter::qt_metacall(QMetaObject::Call, int, void**)' 
moc_joystick.o:moc_joystick.cpp:(.text+0x20): first defined here 
collect2: ld returned 1 exit status 
make: *** [anishaJoystick] Error 1 

源文件：

#include <stdio.h> 
#include <sys/types.h> 
#include <sys/stat.h> 
#include <fcntl.h> 
#include <unistd.h> 
#include <stdlib.h> 
#include <string.h> 

#include "joystick.h" 

static int joystick_fd = -1; 

int Counter::open_joystick() 
{ 
    joystick_fd = open(JOYSTICK_DEVNAME, O_RDONLY | O_NONBLOCK); // read write for force feedback? 
    if (joystick_fd < 0) 
     return joystick_fd; 

    // maybe ioctls to interrogate features here? 

    return joystick_fd; 
} 

int Counter::read_joystick_event(struct js_event *jse) 
{ 
    int bytes; 

    bytes = read(joystick_fd, jse, sizeof(*jse)); 

    if (bytes == -1) 
     return 0; 

    if (bytes == sizeof(*jse)) 
     return 1; 

    printf("Unexpected bytes from joystick:%d\n", bytes); 

    return -1; 
} 

void Counter:: close_joystick() 
{ 
    close(joystick_fd); 
} 

int Counter::get_joystick_status(struct wwvi_js_event *wjse) 
{ 
    int rc; 
    struct js_event jse; 
    if (joystick_fd < 0) 
     return -1; 

    // memset(wjse, 0, sizeof(*wjse)); 
    while ((rc = read_joystick_event(&jse) == 1)) { 
     jse.type &= ~JS_EVENT_INIT; /* ignore synthetic events */ 
     if (jse.type == JS_EVENT_AXIS) { 
      switch (jse.number) { 
      case 0: wjse->stick_x = jse.value; 
       break; 
      case 1: wjse->stick_y = jse.value; 
       break; 
      default: 
       break; 
      } 
     } else if (jse.type == JS_EVENT_BUTTON) { 
      if (jse.number < 10) { 
       switch (jse.value) { 
       case 0: 
       case 1: wjse->button[jse.number] = jse.value; 
        break; 
       default: 
        break; 
       } 
      } 
     } 
    } 
    // printf("%d\n", wjse->stick1_y); 
    return 0; 
} 

//#if 0 
/* a little test program */ 
int main(int argc, char *argv[]) 
{ 
    int fd, rc; 
    int done = 0; 

    struct js_event jse; 

    Counter c; 
    fd = c.open_joystick(); 
    if (fd < 0) { 
     printf("open failed.\n"); 
     exit(1); 
    } 

    while (!done) { 
     rc = c.read_joystick_event(&jse); 
     usleep(1000); 
     if (rc == 1) { 
      printf("Event: time %8u, value %8hd, type: %3u, axis/button: %u\n", jse.time, jse.value, jse.type, jse.number); 
     } 
    } 
} 
//#endif 

Answer 1

你可能有多個moc_ *文件，也許老在一些重命名後，在你的目錄中，並運行qmake -project在您的構建中包含了舊的。它發現了相同的名稱（moc_mm.cpp和moc_joystick.cpp）和衝突多moc_ *聲明。

手動刪除所有moc_ *文件，然後使用-project重新創建.pro文件。