标签: linker-errors

首先,请原谅我对C++的不了解.我是一个真正的初学者!

我想在MS VS2005上编译一个C++代码.下面的代码我得到如下链接器错误: -

在一个函数(某个类方法)定义中,它具有用于内存分配的代码,如:

CDecoderUnit *du = new CDecoderUnit(); //<<error is shown at this line 

这个CDecoderUnit是一个在头文件中定义的类

class CDecoderUnit : public IPrepareDecoderUnit
{
   CDecoderUnit();
   ~CDecoderUnit();
...
...
other class definition.

..
..
}

实际错误是: -

错误LNK2019:未解析的外部符号"public:__thiscall CDecoderUnit :: CDecoderUnit(void)"(?? 0CDecoderUnit @@ QAE @ XZ)在函数"private:long __thiscall CLSDEnc :: CreateIPrepareDecoderUnit(struct IPrepareDecoderUnit*&)const"中引用(？ CreateIPrepareDecoderUnit @ CLSDEnc @@ ABEJAAPAUIPrepareDecoderUnit @@@ Z)lsdenc.obj

谁能指点我解决这个问题？

安装Xerces-C ++（XML库）后：

./configure --disable-shared
./make
./make-install
ldconfig

并编写简单程序（xmlval.cpp）：

#include <stdio>
#include <xercesc/dom/DOM.hpp>

int main()
{
    std::cout << "HI" << std::endl;
}

并编译：

/usr/bin/g++ -L/usr/local/lib -I/usr/local/include -o xmlval xmlval.cpp /usr/local/lib/libxerces-c.a

编译结果是一串这样的代码：

/usr/local/lib/libxerces-c.a(CurlNetAccessor.o): In function `xercesc_3_0::CurlNetAccessor::cleanupCurl()':
/home/stullbd/xerces-c-3.0.1/src/xercesc/util/NetAccessors/Curl/CurlNetAccessor.cpp:78: undefined reference to `curl_global_cleanup'
/usr/local/lib/libxerces-c.a(CurlNetAccessor.o): In function `xercesc_3_0::CurlNetAccessor::initCurl()':
/home/stullbd/xerces-c-3.0.1/src/xercesc/util/NetAccessors/Curl/CurlNetAccessor.cpp:70: undefined reference to `curl_global_init'
/usr/local/lib/libxerces-c.a(CurlURLInputStream.o): In function `~CurlURLInputStream':
/home/stullbd/xerces-c-3.0.1/src/xercesc/util/NetAccessors/Curl/CurlURLInputStream.cpp:168: undefined reference to `curl_multi_remove_handle'

有什么想法吗？

我使用的是ubuntu 10.04和libboost1.40.

ls -l /usr/lib | grep boost_pro
    -rw-r--r--  1 root root   640800 2010-04-01 05:19 libboost_program_options.a
    lrwxrwxrwx  1 root root       26 2011-11-03 22:40 libboost_program_options-mt.a ->                  libboost_program_options.a
    lrwxrwxrwx  1 root root       34 2011-11-03 22:40 libboost_program_options-mt.so ->                libboost_program_options.so.1.40.0
    lrwxrwxrwx  1 root root       34 2011-11-03 22:40 libboost_program_options.so ->    libboost_program_options.so.1.40.0
    -rw-r--r--  1 root root   289336 2010-04-01 05:19 libboost_program_options.so.1.40.0

这是main.cpp(仅用于测试)

     #include <string> 
#include <iostream> 
#include <boost/date_time/gregorian/gregorian.hpp> 
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/program_options/options_description.hpp>
//--------------------------------------------------------------------- 
int main(int argc,char** argv) 
{ 
 boost::gregorian::date now(boost::gregorian::day_clock::local_day());
 //is works fine 
 std::cout<<boost::gregorian::to_iso_string(now)<<std::endl;
 boost::program_options::options_description a; //but …

编辑一些代码后,我得到4个构建错误:

Undefined symbols for architecture i386:
"_OBJC_CLASS_$_Playlist", referenced from:
  objc-class-ref in PlayerViewController.o
"_OBJC_CLASS_$_Song", referenced from:
  objc-class-ref in PlayerViewController.o
"_currentIndex", referenced from:
  -[PlayerViewController viewDidLoad] in PlayerViewController.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

关于如何解决这个问题的任何提示？

我试图将SDL_mixer,SDL_ttf和SDL_image链接到我的项目,但由于某种原因,在编译我的代码时会弹出这些错误.我包含的头文件取决于它上面的库.我按此顺序链接到我的库:

MinGW32 OpenGL32 SDLmain SDL SDL_image SDL_ttf SDL_mixer

#include <map>
#include <string>
#include <sstream>
#include <fstream>
#include <iostream>
#include <GL/gl.h>
#include <SDL/SDL.h>
#include <SDL/SDL_opengl.h>
#include <SDL/SDL_image.h>
#include <SDL/SDL_mixer.h>
#include <SDL/SDL_ttf.h>

using namespace std;

#include "include_file.h"
#include "structure.h"
#include "player.h"
#include "healthclass.h"
#include "items.h"
#include "loadfiles.h"
#include "init_game.h"
#include "missions.h"

那么错误:

obj\Release\main.o:main.cpp:(.text+0x16e): undefined reference to `Mix_LoadMUS'
obj\Release\main.o:main.cpp:(.text+0x197): undefined reference to `Mix_LoadWAV_RW'
obj\Release\main.o:main.cpp:(.text+0x1c0): undefined reference to `Mix_LoadWAV_RW'
obj\Release\main.o:main.cpp:(.text+0x1e9): undefined reference to `Mix_LoadWAV_RW'
obj\Release\main.o:main.cpp:(.text+0x7cd): undefined reference to `IMG_Load'
obj\Release\main.o:main.cpp:(.text+0x996): undefined reference to `TTF_RenderUTF8_Shaded' …

我正在开发一款带有ARC的cocos2d的游戏.游戏在模拟器中构建和运行良好,但是当我构建设备时,我得到了Apple Mac-O Linker Errors,说我错过了libcocos2d.a等的库.

clang: error: no such file or directory: '/Users/aleksandartrpeski/Library/Developer/Xcode/DerivedData/jellyfish-fsomqwhqasishxcfzhgvccrdvzpt/Build/Products/Debug-iphoneos/libcocos2d.a'
clang: error: no such file or directory: '/Users/aleksandartrpeski/Library/Developer/Xcode/DerivedData/jellyfish-fsomqwhqasishxcfzhgvccrdvzpt/Build/Products/Debug-iphoneos/libCocosDenshion.a'
clang: error: no such file or directory: '/Users/aleksandartrpeski/Library/Developer/Xcode/DerivedData/jellyfish-fsomqwhqasishxcfzhgvccrdvzpt/Build/Products/Debug-iphoneos/libkazmath.a'
clang: error: no such file or directory: '/Users/aleksandartrpeski/Library/Developer/Xcode/DerivedData/jellyfish-fsomqwhqasishxcfzhgvccrdvzpt/Build/Products/Debug-iphoneos/liblibpng.a'

当我去文件丢失的文件夹时,我只看到了jellyfish.app.

我在这类问题上没有多少经验,我不清楚为什么会这样,我检查了如何从TinyTimGames和LearnCocos2D启动项目,仍然不清楚我做错了什么.

可能重复:
LINK:致命错误LNK1248:图像大小超过最大允许大小(80000000)

#define no_cust 4000
#define no_plant 50  
#define no_sup 2000  
#define No_population 100
#define Iteration 3

struct Output2{
    long double RandomZhj[No_population];
    double Population[No_population];   
    long double result;
    long double cost_sup_to_plant;
    long double velocity[No_population];        
}Zhj[no_sup][no_plant],Whj[no_sup][no_plant],Vhj_t1[no_sup][no_plant];

当我运行程序时,它显示:

致命错误LNK1248:图像尺寸(818D4000)超出最大允许尺寸(80000000)

我想知道如何更正我的程序.

我刚接触C++编程,但有一些Java经验.我创建了一个非常基本的类Dog.cpp及其头文件Dog.hpp.Netbeans不会构建项目,给我一个错误,说明构造函数和getAge函数的多个定义.就我而言,我已经在头文件中声明了构造函数和函数,并在类文件中定义它们.我哪里出错了？

提前致谢!

Dog.hpp:

#include <iostream>
using namespace std;
class Dog 
{
public:
    Dog(int someAge);           // Constructor
    ~Dog();                     // Destructor
    int getAge() const;         // function prototype
private:
    int itsAge;                 // age variable

};

Dog.cpp:

#include "Dog.hpp"
using namespace std;


Dog::Dog(int anAge) 
{
    cout << "Dog created \n";
}

int Dog::getAge() const
{
    return itsAge;
}

**main.cpp

#include <iostream>
#include "Dog.cpp"

int main() 
{
    Dog aDog(5);
    cout << aDog.getAge();
    return 0;
}

Netbeans输出:

"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory …

我对iOS开发比较陌生.我不知道如何解决以下我认为引用蓝牙库的错误.我该怎么做才能调试/解决这个问题？

架构armv7的未定义符号:"_CBCentralManagerScanOptionAllowDuplicatesKey",引用自:libnCLiOS.a(nclCb.o)中的_nclSStartScan"_CBAdvertisementDataManufacturerDataKey",引用自: - [Boss centralManager:didDiscoverPeripheral:advertisementData:RSSI:] in libNCLiOS.a(nclCb.o )"_ OBJC_CLASS _ $ _ CBUUID",引自:libnCLiOS.a中的objc-class-ref(nclCb.o)"_ OBJC_CLASS _ $ _ CBCentralManager",引自:libNCLiOS.a中的objc-class-ref(nclCb.o)ld:symbol (s)找不到架构armv7 clang:错误:链接器命令失败,退出代码为1(使用-v查看调用)

我正在尝试将Firebase Messaging添加到我的iOS项目中.我无法使用Pod,因为我的Developermachine会破坏它们.所以我手动添加框架.正如自述文件所述,我将分析和消息文件夹的所有框架以及Firebase.h添加到我的Xcode项目中.我添加了其他Stackoverflow问题中提到的Storekit.framework,libz,libc ++和libsqlite3.0,以消除大多数链接器错误.但由于以下错误,我仍然无法编译/链接我的项目:

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_SKPaymentQueue", referenced from:
      objc-class-ref in FirebaseAnalytics(FIRAInAppPurchaseTransactionReporter_ca1fe3eb82b823d5f96d3f8b4baedc9c.o)
  "_OBJC_CLASS_$_SKProductsRequest", referenced from:
      objc-class-ref in FirebaseAnalytics(FIRAProductsRequest_8f770071350872416d311668917f3a41.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我不明白为什么他们会丢失或者我需要添加哪个库来进行此操作.有人知道该怎么办吗？

我还应该提到我在这个项目上使用Qt.

提前致谢,