关于Qt的问题 undefined reference to-CSDN论坛

论坛帮助

CSDN论坛 > 移动开发 > Qt

关于Qt的问题 undefined reference to [问题点数：45分，结帖人wk5882846]

⋅如何静态显示图片 ⋅Qt串口问题 ⋅QGraphicsItem缩放中心的问题 更多帖子 关注私聊空间博客 wk5882846 本版专家分：76 结帖率 71.43%: 问题是这样的：我用类QSvgRenderer 写了一个小程序，结果报错
D:\programing\svg/svgwidget.cpp:3: undefined reference to `_imp___ZN10QSvgWidgetC2EP7QWidget'
D:\programing\svg/svgwidget.cpp:5: undefined reference to `_imp___ZNK10QSvgWidget8rendererEv'
D:\programing\svg/svgwidget.cpp:6: undefined reference to `_imp___ZN10QSvgWidgetD2Ev'
D:\programing\svg/svgwidget.cpp:3: undefined reference to `_imp___ZN10QSvgWidgetC2EP7QWidget'
D:\programing\svg/svgwidget.cpp:5: undefined reference to `_imp___ZNK10QSvgWidget8rendererEv'
D:\programing\svg/svgwidget.cpp:6: undefined reference to `_imp___ZN10QSvgWidgetD2Ev'
....
应该是一些库没链接上？具体应该怎么办呢？
有一点线索
在预处理命令里，我用#include <QSvgRenderer>是不行的
必须用#include <QSvg/QSvgRenderer>
求大神指点

0 2012-03-15 18:25:10

回复数 3 只看楼主引用举报楼主

⋅Digia宣布收购Qt ⋅诺基亚将在8月底关闭Qt在Brisbane的办公室 ⋅MeeGo --> Jolla, with Qt ;) 更多帖子 关注私聊空间博客 zhu_xz 本版专家分：8173: .pro里面QT+=svg

0 2012-03-15 19:05:45

只看TA 引用举报 #1 得分 45

qt 当中undefined reference to /home/sdust/untitled1/mainwindow.cpp:154: rn我自己写了个函数bool IsValidEmail(string)rn运行提示rnerror: undefined reference to `MainWindow::IsValidEmail(std::string)'rn急~~~

⋅诺基亚开除 QT 团队，真的还是假的？ 更多帖子 关注私聊空间博客 jdwx 本版专家分：20924 红花 2013年3月移动平台大版内专家分月排行榜第一 2013年1月移动平台大版内专家分月排行榜第一 2012年12月移动平台大版内专家分月排行榜第一 2012年11月移动平台大版内专家分月排行榜第一 黄花 2013年8月移动平台大版内专家分月排行榜第二 2013年4月移动平台大版内专家分月排行榜第二 蓝花 2013年5月移动平台大版内专家分月排行榜第三: pro文件里增加svg了吗？
如下：
QT += core gui svg

0 2012-03-15 19:06:54

只看TA 引用举报 #2 得分 0

QT编译错误 undefined reference to 编译QT遇到如下错误,请问怎么解决rn[img=https://img-bbs.csdn.net/upload/201706/22/1498118569_898383.png][/img]

⋅Android版、Qt版的亲们，偶卸甲归田了，祝大家2013年技术进步噌噌的！ ⋅【散分】+【拉票】 ⋅【散分】+【拉票】 更多帖子 关注私聊空间博客 念茜 本版专家分：58254 红花 2012年6月移动平台大版内专家分月排行榜第一 2012年5月移动平台大版内专家分月排行榜第一 2012年4月移动平台大版内专家分月排行榜第一 2012年3月移动平台大版内专家分月排行榜第一 2012年2月移动平台大版内专家分月排行榜第一 2012年1月移动平台大版内专家分月排行榜第一 2011年12月移动平台大版内专家分月排行榜第一 2011年11月移动平台大版内专家分月排行榜第一 2011年10月移动平台大版内专家分月排行榜第一 2011年9月移动平台大版内专家分月排行榜第一 2011年6月移动平台大版内专家分月排行榜第一 2011年5月移动平台大版内专家分月排行榜第一 2011年4月移动平台大版内专家分月排行榜第一 黄花 2011年8月移动平台大版内专家分月排行榜第二 2011年7月移动平台大版内专家分月排行榜第二 2011年3月移动平台大版内专家分月排行榜第二 蓝花 2012年8月移动平台大版内专家分月排行榜第三 2012年7月移动平台大版内专家分月排行榜第三: 引用 1 楼 zhu_xz 的回复:
.pro里面QT+=svg

顶1L

0 2012-03-15 22:51:50

只看TA 引用举报 #3 得分 0

问题关于undefined reference to 在linux下，我装了一个新的库，叫Gosu的2d游戏引擎。用CodeBlocks打开一个范例程序，报了很多的undefined reference to错误，程序include了gosu/gosu.hpp这个文件，我去/usr/include文件夹下，找到了gosu这个文件夹，文件夹下的文件也都是齐的。但是我不知道cpp文件都放在什么地方。安装的时候没报错。是什么原因呢？rnrn以前也常有这种问题，不知道是怎么回事。rnrn是不是编译器设置不对？GNU GCC Compiler。

收藏帖子

关于undefined reference to 问题: ab.h文件有这么一段定义rnclass Matrix : public GeneralMatrix // usual rectangular matrixrnrn GeneralMatrix* Image() const; // copy of matrixrnpublic:rn Matrix() rn ~Matrix() rn Matrix(int, int); // standard declarationrn Matrix(const BaseMatrix&); // evaluate BaseMatrixrn void operator=(const BaseMatrix&);rn void operator=(Real f) GeneralMatrix::operator=(f); rn void operator=(const Matrix& m) operator=((const BaseMatrix&)m); rn ...rn ...rn;rnrn主函数k.cpp 下面这段代码出错rn Matrix xhat(n,1);rn Matrix phi(n,n);rn Matrix z(m,1);rn错误信息是类似undefined reference to `Matrix::Matrix(int, int)'rn请问如何解决？rn

QT Creator 报“undefined reference to” 问题: 你不要告诉我没有加LIB库，不是的，因为报错的这些函数根本不在任何库里边，是我我自己写的啊，文件头也include 了，为什么？rnE:\qt\gerbv\gerb_image.c:810: error: undefined reference to `gerber_create_new_net'rnE:\qt\gerbv\gerb_image.c:824: error: undefined reference to `gerber_update_min_and_max'rn。。。。。

关于agent++的undefined reference: 我在Ubuntu上解压好snmp++ agent++ agentX++三个压缩包，都放在snmp++文件夹下rnsnmp++rn --snmp++rn --agent++rn --agentX++rn然后在snmp++/include/snmp_pp的config_snmp_pp.h定义#define _NO_SNMPv3rn分别用Makefile.linux编译这三个包生成各自的库文件，加入到我的code::block工程中去，rn引入一下头文件rn#include rn#include rn#include rn#include rn#include rn编译能通过，在链接时总是出错：rn/software/snmp++/agentX++/lib/libagentx++.a(agentx_request.o): In function `NoVacm':rn/software/snmp++/agentX++/src/agentx_request.cpp:40: undefined reference to `Agentpp::Vacm::Vacm()'rn/software/snmp++/agentX++/src/agentx_request.cpp:40: undefined reference to `Agentpp::Vacm::Vacm()'rn/software/snmp++/agentX++/lib/libagentx++.a(agentx_request.o): In function `~NoVacm':rn/software/snmp++/agentX++/src/agentx_request.cpp:46: undefined reference to `Agentpp::Vacm::~Vacm()'rn/software/snmp++/agentX++/src/agentx_request.cpp:46: undefined reference to `Agentpp::Vacm::~Vacm()'rn/software/snmp++/agentX++/src/agentx_request.cpp:46: undefined reference to `Agentpp::Vacm::~Vacm()'rn/software/snmp++/agentX++/lib/libagentx++.a(agentx_request.o):(.rodata._ZTIN7Agentpp6NoVacmE[typeinfo for Agentpp::NoVacm]+0x8): undefined reference to `typeinfo for Agentpp::Vacm'rncollect2: ld returned 1 exit statusrnrn这是怎么回事啊?在网上我根本搜不到解决办法啊，求救啊。。。

关于undefined reference to头文件: 你们好，有个问题：rn我工程文档里有main.cpp, list.cpp, list.hrn其中list.cpp和main.cpp都有INCLUDE那个list.h头文件，可当我用main.cpp试图调用list.h里声明的函数却说rnmain.cpp:12: undefined reference to `list::list()rn很奇怪应该是可以工作的阿，3个文件也都在一个项目包，一个文件夹下。rn因为我有个其他的工程，里面这么做是可行的。rn很奇怪的问题。谢谢各位rng++ -o CopyConstructor.exe src\main.o src\list.ornsrc\main.o: In function `main':rnC:\Files\workplace\CopyConstructor\Debug/../src/main.cpp:12: undefined reference to `list::list()'rnrnlist文件代码：rn[code=C/C++]rn#ifndef LIST_H_rn#define LIST_H_rnrn#include rn#include rnusing namespace std;rnrntemplate rnclass nodernpublic:rn T data;rn node *next;rn;rnrntemplate rnclass listrnpublic:rn list();rn void create();rn bool isEmpty() const;rn void addNode(const T t);rn void deleteNode(const T t);rn void deleteLast();rn void display() const;rn node *getNode(int i);rn bool find(const T t);rnprivate:rn node *head;rn;rnrnrn#endifrn[/code]

undefined reference to ... 问题: 在写一个内存池，可是在总是出现如题的这个错误rn[code=c]rn#ifndef MEMORYPOOL_Hrn#define MEMORYPOOL_Hrnrn#include rn#include rnrntemplate rnclass MemoryPoolrnrnpublic:rn MemoryPool(int _size = DEFAULTSIZE);rn ~MemoryPool();rn void* alloc(size_t _size);rn void free(void* element, size_t size);rn int size() const rn return _size;rn rn int vaildSize() const rn return _validsize;rn rnprivate:rn enum DEFAULTSIZE = 5;rn /**rn * @brief pool 用来存放内存块的指针rn */rn std::list pool;rn void expandPool(int _len = DEFAULTSIZE);rn int _size;rn int _validsize;rn;rnrntemplate rnMemoryPool::MemoryPool(int _size):rn _size(0),rn _validsize(0)rnrn expandPool(_size);rnrntemplate rnMemoryPool::~MemoryPool()rnrn std::list::iterator ite = pool.begin();rn for (;ite != pool.end();++ite) rn delete[] (*ite);rn rnrntemplate rnvoid* MemoryPool::alloc(size_t /*_size*/)rnrn if (pool.empty()) rn expandPool();rn rn void* t = pool.front();rn pool.pop_front();rn --_validsize;rn return t;rnrntemplate rnvoid MemoryPool::free(void *element, size_t /*size*/)rnrn pool.push_back(element);rn ++_validsize;rnrntemplate rnvoid MemoryPool::expandPool(int _len)rnrn for (int i = 0;i < _len;++i) rn pool.push_back(static_cast(new char[sizeof(T)]));rn rn _validsize += _len;rn _size += _len;rnrnrnrn#endif // MEMORYPOOL_Hrnrn#ifndef TESTOBJ_Hrn#define TESTOBJ_Hrn#include "memorypool.h"rnrnclass Objrnrnpublic:rn Obj() rn static void newPool() rn mPool = new MemoryPool();rn rn static void deletePool() rn delete mPool;rn rn void* operator new(size_t size) rn return mPool->alloc(size);rn rn void operator delete(void* m, size_t size) rn mPool->free(m,size);rn rnrnprivate:rn static MemoryPool *mPool;rn;rnMemoryPool Obj::mPool = NULL;rnrn#endif // TESTOBJ_Hrnrnrn[/code]rnrnrn[img=https://img-bbs.csdn.net/upload/201304/30/1367282753_435259.png][/img]rnrn希望大虾帮解决下

undefined reference to的问题: 小弟我入门不久，遇到一个不懂的问题，我写了如下程序，但是编译的时候出现了问题，不知道怎么修正，望各位师傅解答解答rn#include rnvoid printed(int n);rnint main()rn rn int a = 287;rn printed(287);rn getchar();rn return 0;rnrnvoid printd(int n)rnrn if (n < 0) rn rn putchar('-');rn n = -n;rn rn if (n / 10)rn printed(n / 10);rn putchar(n % 10 + '0');rn

undefined reference to'CPU_ZERO'问题: 我在使用sched_setaffinity将线程和CPU绑定，但总显示“undefined reference to'CPU_ZERO'”。我在文件头已经写了rn#define __USE_GNUrn#include rn为什么出现这些问题，怎样解决？谢谢

undefined reference to 问题: 一个简单的建树，打印树的程序。。上眼。。rn[code=C/C++]rn//Tree.h rn 1 #includern 2 using namespace std; rn 10 template < typename T>rn 11 struct nodern 12 //friend class Act;rn 13 T data; rn 14 node< T > *lch;rn 15 node< T > *rch;rn 16 node();rn 17 //node( const T &x );rn 18 ~node();rn 19 ;rn 20 rn 21 template < typename T >rn 22 class Actrn 23 public:rn 24 void Init( node< T >* tr );rn 25 void Print( node< T >* tr );rn 26 ;rnrn//Tree.cpprn 1 #includern 2 #include"Tree.h"rn 3 using namespace std;rn 4 template < typename T >rn 5 void Act< T >::Init( node< T >* tr )rn 6 rn 7 tr = new node< char >;rn 8 cout << "输入data : " << flush;rn 9 cin >> tr -> data;rn 10 if ( tr -> data != "*" )rn 11 rn 12 Init( tr -> lch );rn 13 Init( tr -> rch );rn 14 rn 15 rn 16 template < typename T >rn 17 void Act< T >::Print(node< T >* tr )rn 18 rn 19 if( tr -> data != "*" )rn 20 rn 21 cout << tr -> data << endl;rn 22 Print(tr -> lch ); rn 23 Print(tr -> rch );rn 24 rn 25 rnrn//Main.cpprn 1 #includern 2 #include"Tree.h"rn 3 using namespace std;rn 4 int main()rn 5 rn 6 node< char >* root;rn 7 Act< char > act;rn 8 act.Init( root );rn 9 act.Print( root );rn 10 rn 11 return 0;rn 12 rn[/code]rn报错：rn/tmp/ccP9q7K0.o: In function `main':rn/home/jzh/ProgrammerExcerse/Main.cpp:8: undefined reference to `Act::Init(node*)'rn/home/jzh/ProgrammerExcerse/Main.cpp:9: undefined reference to `Act::Print(node*)'rncollect2: ld 返回 1rnrn不明白阿。。。。。求解

undefined reference to ....: http://codepad.org/7x4aaR3D 不知道问题是什么。。。

undefined reference: 编译时出错：rn.o /e/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/pcre_exec.o /e/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/pcre_ord2utf8.o /e/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/pcre_newline.o /e/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/pcre_fullinfo.o /e/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/pcre_xclass.o -L/e/pocobuild/lib/MinGW/ia32 -liphlpapi -lws2_32 -lpcrernCreating library file: e:/pocobuild/lib/MinGW/ia32/libPocoFoundationd.arne:/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/LoggingFactory.o(.text$_ZNK4Poco12InstantiatorINS_15EventLogChannelENS_7ChannelEE14createInstanceEv[Poco::Instantiator::createInstance() const]+0x59): In function `ZN4Poco12InstantiatorINS_17FormattingChannelENS_7ChannelEED1Ev':rne:/poco-1.3.1-data/Foundation/include/Poco/Instantiator.h: undefined reference to `Poco::EventLogChannel::EventLogChannel()'rne:/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/LoggingFactory.o(.text$_ZNK4Poco12InstantiatorINS_21WindowsConsoleChannelENS_7ChannelEE14createInstanceEv[Poco::Instantiator::createInstance() const]+0x59):e:/poco-1.3.1-data/Foundation/include/Poco/Instantiator.h: undefined reference to `Poco::WindowsConsoleChannel::WindowsConsoleChannel()'rne:/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/SyslogChannel.o(.text+0x6e4): In function `ZN4Poco13SyslogChannel4openEv':rne:/poco-1.3.1-data/Foundation/src/SyslogChannel.cpp:76: undefined reference to `openlog'rne:/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/SyslogChannel.o(.text+0x702): In function `ZN4Poco13SyslogChannel5closeEv':rne:/poco-1.3.1-data/Foundation/src/SyslogChannel.cpp:85: undefined reference to `closelog'rne:/pocobuild/Foundation/obj/MinGW/ia32/debug_shared/SyslogChannel.o(.text+0x762): In function `ZN4Poco13SyslogChannel3logERKNS_7MessageE':rne:/poco-1.3.1-data/Foundation/src/SyslogChannel.cpp:94: undefined reference to `syslog'rnrn看样子是是缺少可查了很久rn第一我包含了//这个只有openlog(),closelog()的声明，缺没有定义，rn我不知道到底怎么回事？是不是g++时没有带什么时候-l参数如果缺少库是缺那个我也不知道，望高手指点rn

undefined reference to `__asan_report_load8'问题: 在ubuntu上写c++，gcc和g++版本都是4.8.4。rn编译的时候出现这个提示：rn[code=c]rnrn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_load8'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_store2'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_load4'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_handle_no_return'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_load16'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_init_v1'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6:/home/zhaokt/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_load8'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_store2'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_load4'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_handle_no_return'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_load16'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_init_v1'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_store4'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_load2'rn1> ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6: undefined reference to `__asan_report_store8'rnrn[/code]rn链接命令：rn[code=c]rnrng++ -o "~/workspace/fileservicemanager/fileservicemanager/../bin/x64/Debug/fileservicemanager" -Wl,--no-undefined -Wl,-z,relro -Wl,-z,now -Wl,-z,noexecstack -ldl -pthread ~/workspace/fileservicemanager/fileservicemanager/obj/x64/Debug/main.o ~/workspace/fileservicemanager/bin/x64/Debug/libnetwork.so ~/workspace/fileservicemanager/bin/x64/Debug/liblog4cplus-1.2.so.5.1.6rnrn[/code]rnrn在网上没找到好的解决方案，不知道该怎么解决。

请教 undefined reference to的问题: 我编译成功了libfaad.a，把这个文件和libfaad下面include目录的２个头文件拷贝到ffmpeg下面，./config -enable-libfaad等成功，但是在进入libavcodec目录，并执行make命令时，在生成libfaad.o之后，连接时出现下面的错误：rn/ffmpegwm5/libavcodec/libfaad.c:316: undefined reference to `NeAACDecClose'rn/ffmpegwm5/libavcodec/libfaad.c:316: undefined reference to `NeAACDecOpen'rnrn而这两个函数我都在libfaad.a上能找到符号的，请问各位大虾知不知道怎么回事？　谢谢。

[vxworks undefined reference to 的问题]: 各位大大，知道的麻烦说一下，rn往BSP中添加一块dm9000a的网卡，Feidm9KEndLoad,结果rbuild的时候出现下面的错误，不知道是什么原因？rnC:\Tornado2.2\host\x86-win32\bin\makeSymTbl.bat pentium tmp.o symTbl.crnccpentium -c -fdollars-in-identifiers -g -mcpu=pentiumiii -march=p3 -ansi -nostdlib -fno-b rnuiltin -fno-defer-pop -I.. -IC:\Tornado2.2\target\config\SR-3120 -IC:\Tornado2.2\target\h rn-IC:\Tornado2.2\target\config\comps\src -IC:\Tornado2.2\target\src\drv -DCPU=PENTIUM3 -DTO rnOL_FAMILY=gnu -DTOOL=gnu -DPRJ_BUILD -w symTbl.c -o symTbl.ornccpentium -g -mcpu=pentiumiii -march=p3 -ansi -nostdlib -fno-builtin -fno-defer-pop -I.. - rnIC:\Tornado2.2\target\config\SR-3120 -IC:\Tornado2.2\target\h -IC:\Tornado2.2\target\confi rng\comps\src -IC:\Tornado2.2\target\src\drv -DCPU=PENTIUM3 -DTOOL_FAMILY=gnu -DTOOL=gnu -DP rnRJ_BUILD -c C:\Tornado2.2\target\config\comps\src\dataSegPad.crnldpentium -X -N -e sysInit -Ttext 00308000 \rn dataSegPad.o partialImage.o ctdt.o symTbl.o \rn -T C:\Tornado2.2\target\h\tool\gnu\ldscripts\link.RAM -o vxWorksrnpartialImage.o: In function `vgaWriteString':rnf:\work_project\PCI_project\work_spce\proj\SR-3120\default\C:\Tornado2.2\target\src\drv\se rnrial\m6845Vga.c:1068: undefined reference to `Feidm9kEndLoad'rnmake: *** [vxWorks] Error 0x1rnrnDone.

undefined reference to `WinMain@16'问题: 程序调用QTest：：qwait函数，但编译提示我undefined reference to `WinMain@16'错误问题，头文件QTest.h加了，pro项目文件里添加了CONFIG += qtestlib，但还是提示上面的错误。

undefined reference to问题！！！: main.c:(.text+0x7): undefined reference to `test' rncollect2: ld returned 1 exit status rnrntest是在mainwindow.h中定义的全局变量，然后在main.cpp和mainwindow.cpp中使用时出现这个问题，求助

Undefined reference: 在学习Computer System这本书rn看到第十二章，按照书上的代码敲了一个Web Server出来rn[code=C/C++]rn#include "csapp.h"rnrnvoid echo(int connfd);rnrnint main( int argc, char **argv)rnrn int listenfd, connfd, port, clientlen;rn struct sockaddr_in clientaddr;rn struct hostent *hp;rn char *haddrp;rn rn if(argc != 2)rn rn fprintf(stderr, "Usage: %s \n", argv[0]);rn exit(0);rn rn port = atoi(argv[1]);rn rn listenfd = Open_listenfd(port);rn while(1)rn rn clientlen = sizeof(clientaddr);rn connfd = accept(listenfd, (SA *)&clientaddr, &clientlen);rn rn hp = Gethostbyaddr( (const char *)&clientaddr.sin_addr.s_addr, sizeof(clientaddr.sin_addr.s_addr), AF_INET); rn haddrp = inet_ntoa(clientaddr.sin_addr);rn printf("Server connected to %s (%s)\n", hp->h_name, haddrp);rn rn echo(connfd);rn Close(connfd);rn rn rn exit(0);rnrnrnvoid echo(int connfd)rnrn size_t n;rn char buf[MAXLINE];rn rio_t rio;rn rn Rio_readinitb(&rio,connfd);rn while( (n = Rio_readlineb(&rio, buf, MAXLINE)) != 0)rn rn printf("Server received %d bytes\n", n);rn Rio_writen(connfd, buf, n);rn rnrnrn[/code]rnrnrnrn在Ubuntu 64bit下面rngcc -Wall server.c -o serverrnrn编译器报错：rnundefined reference to "Open_listenfd"rnundefined reference to "Gethostbyaddr"rnundefined reference to "Close"rnrnundefined reference to "Rio_readinitb"rnundefined reference to "Rio_writen"rnundefined reference to "Rio_readlineb"rnrnrn头文件 csapp.h我是从教材的官网上下载的rn我也看过了，上面这些“undefined”的函数，在头文件里面也有。rnrn不明白为什么编译器报错，望指教！rnrn谢谢！

qt报错undefined reference to `vtable for btnStyle': 头文件中：rn//错误:undefined reference to `vtable for btnStyle'rnclass btnStyle : public QProxyStylernrn Q_OBJECTrnpublic:rn btnStyle();rn rn；rnrn构造函数如下：rnrnrnrn//出错地方![图片说明](https://img-ask.csdn.net/upload/201512/25/1451045070_402185.png)rnrn![图片说明](https://img-ask.csdn.net/upload/201512/25/1451045142_309874.png)rn一直报错什么问题呢，我只是对qt的例子稍微改了下，但是主体框架都没改

Qt在CodeBlocks下链接错误（minGW）undefined reference to `_Unwind_Resume': 按照网上给出的教程来配置CodeBlock尝试编译Qt程序。发现链接出现错误，一直都没有解决。这该如何是好！rnd:\Qt\lib\libqtmaind.a(qtmain_win.o)||In function `WinMain@16':|rnc:\iwmake\build_mingw_opensource\src\winmain\qtmain_win.cpp|93|undefined reference to `_Unwind_Resume'|rnc:\iwmake\build_mingw_opensource\src\winmain\qtmain_win.cpp|135|undefined reference to `_Unwind_Resume'|rn..\..\..\..\iwmake\build_mingw_opensource\src\corelib\tools\qvector.h|512|undefined reference to `_Unwind_Resume'|rn..\..\..\..\iwmake\build_mingw_opensource\src\corelib\tools\qvector.h|513|undefined reference to `_Unwind_Resume'|rnd:\Qt\lib\libqtmaind.a(qtmain_win.o):qtmain_win.cpp:(.eh_frame+0x12)||undefined reference to `__gxx_personality_v0'|rn||=== Build finished: 5 errors, 0 warnings ===|rn求答案……[img=https://forum.csdn.net/PointForum/ui/scripts/csdn/Plugin/003/onion/3.gif][/img]

qt 一个变量声明引用 undefined reference to: 诸位老师好！rn 有一个问题：IDE是qtCreator。我定义了一个类LogUtil，头文件如下LogUtil.h。rn[code=c]rn#ifndef LOGUTIL_Hrn#define LOGUTIL_Hrn#include rn#include "QsLog.h"rnrnclass LogUtil: public QObjectrnrn Q_OBJECTrn public: rn static QString getCurrentLogName()return currentLogFileName ;rn static void setCurrentLogName(QString fileName);rn static void createLogFile(QString fileName);rn static int getLogSize(QString fileName);rn static void log(QString dateTime,QString eventStatus,QString logMsg,QString connectDevice,QString DeviceIp,QString remark);rn rn private:rn LogUtil()rn static QString currentLogFileName;rn;rnrn#endif // LOGUTIL_Hrn[/code]rnrn源文件LogUtil.cpprn[code=c]rn #include rn#include "LogUtil.h"rn#include "QsLog.h"rn#include "QsLogDest.h"rnrnvoid LogUtil::setCurrentLogName(QString fileName)rnrn LogUtil::currentLogFileName = fileName ;rnrnrnint LogUtil::getLogSize(QString fileName)rn int size = 0;rn QFile file(fileName);rnrn if (!file.open(QIODevice::ReadOnly))rn rn return 1;rn rnrn size = file.size();rn file.close();rn return size;rnrnrnvoid LogUtil::createLogFile(QString fileName)rnrn QsLogging::Logger& logger = QsLogging::Logger::instance();rn logger.setLoggingLevel(QsLogging::TraceLevel);rn //const QString sLogPath(QDir(Settings::SavePath()).path()+"/log/"+fileName);rn QString dirPath = "e:/upload";rn const QString sLogPath(QDir(dirPath.append("/log/")).path()+fileName);rn QsLogging::DestinationPtr fileDestination( QsLogging::DestinationFactory::MakeFileDestination(sLogPath) );rn QsLogging::DestinationPtr debugDestination(QsLogging::DestinationFactory::MakeDebugOutputDestination() );rn logger.addDestination(debugDestination.get());rn logger.addDestination(fileDestination.get());rnrn QString currentFileName = "e:/upload";rn currentFileName.append("/log/").append(fileName);rn setCurrentLogName(currentFileName);rnrnrnvoid LogUtil::log(QString dateTime, QString eventStatus, QString logMsg, QString connectDevice, QString DeviceIp, QString remark)rnrn QLOG_INFO()<时[/color]rnrn不知何故，请诸位老师指点，多谢了。

QT中编译时出现的undefined reference to '': 这是我QT .pro里面加的rn LIBS += -L../ffmpeg/lib/libavcodec.dll.arnrn我想要调用该库中的avcodec_register_all();函数rn 于是就出现错误:undefined reference to `avcodec_register_all'rn :-1: 错误:collect2: ld returned 1 exit statusrnrn出现该错误，很明显是在编译的时候，该函数没有找到定义。也就是说没有找到该库。rn可是我在.pro中加了LIBS += -L../ffmpeg/lib/libavcodec.dll.a。不知道是什么原因造成的。

Qt下WSAStartup（）编译报“undefined reference”错误: 用Qt做一个程序，在windows环境下，我用了如下头文件：rn#ifdef _WIN32rn#include rn#elsern#include rn#endifrn可是编译了对WSAStartup（）报错误undefined reference，而且连Socket = socket(PF_INET,SOCK_DGRAM,0);这样的函数都报错，请问这是怎么回事啊？

Qt编译动态库调用错误:undefined reference: 今天使用Qt写了个动态库，在其他项目文件调用此动态库时，总是报下面错误：经过和同事研究，终于发现了问题所在： 1.使用Qt编写动态库时，系统自动生成的.h文件里面有个类，如下面所示 class QHKDLLSHARED_EXPORT QHKDLL { public: QHKDLL(); }; 里面包含 QHKDLLSHARED_EXPORT 这个

关于用G++编译 undefined reference to 的问题！: 照着书上的数据结构算法编链表的，编译通不过。显示undefined reference to `AList::insert(int const&)rnrn书上的算法是这样的，先是一个抽象类ADT，rn/***********Abstract_List.h******************/rntemplate class List rn public:rn //清空rn virtual void clear( ) = 0;rnrn //插入rn virtual bool insert( const Elem& ) = 0;rnrn //添加rn virtual bool append( const Elem& ) = 0;rnrn //移除rn virtual bool remove( Elem& ) = 0;rn 。。。省略。。。。。rnrnrn然后用数组方式实现链表rn/***********Array_List.h*********************/rn#include "Abstract_List.h"rn#define DefaultListSize 200rnrntemplate< class Elem > // Array-based list implementationrnclass AList : public List< Elem > //继承抽象类rn private:rn int maxSize; //Maximum size of listrn int listSize; //Actual number of elements in listrn int fence; //Position of fencern Elem *listArray; // Array holding list elementsrnrn public:rn AList( int size = DefaultListSize ) //Constructorrn maxSize = size;rn listSize = fence = 0;rn listArray = new Elem[maxSize];rn rn ~AList( ) delete [] listArray; //Destructorrn void clear( ) rn delete [] listArray;rn listSize = fence = 0;rn listArray = new Elem[maxSize];rn rn bool insert( const Elem& ); 1 //这三个函数在另外的Cpp中实现。rn bool append( const Elem& ); 2rn bool remove( Elem& ); 3rn void setStart( ) fence = 0; rn 。。。省略。。。。。rnrnrnrn/***************Array_List.cpp****************/rn#include "Array_List.h"rnrn分别为3个实现。rntemplate // Insert at front of right partitionrnbool AList::insert( const Elem& item ) rn if( listSize == maxSize ) return false; //List is fullrn for( int i = listSize; i > fence; i-- ) // Shift Elems uprn listArray[i] = listArray[i-1]; // to make roomrn listArray[fence] = item;rn listSize++; //Increment list sizern return true;rnrnrntemplate //Append Elem to end of the list rnbool AList::append( const Elem& item ) rn if( listSize == maxSize ) return false;rn listArray[listSize++] = item;rn return true;rnrnrn//Remove and return first Elem in right partitionrntemplate rnbool AList::remove( Elem& it ) rn if( rightLength( ) == 0 ) return false; //Nothing in rightrn it = listArray[fence]; //Copy removed Elemrn for( int i = fence; i < listSize - 1; ++i )//Shift them downrn listArray[i] = listArray[i+1];rn listSize--;rn return true;rnrnrn/***************************main.c**************/rn#include "Array_List.h"rn#include rnusing namespace std;rnrnrnint main( int argc, char* argv[] ) rn cout << "Hello world" << endl;rn AList< int > ArrList( 100 ); rn return 0;rnrnmain函数声明了一个链表变量就报错了。rn如果不声名变量的话，可以通过编译，输出hello world。rn不知道这个是什么问题，求大虾指教。rn四个文件都在同一目录下，编译命令用 rng++ Array_main.cpp Array_List.cpprnrnrn出错信息为。rn g++ -o abc Array_main.cpp Array_List.cpprn/tmp/cc5kzKtg.o:(.rodata._ZTV5AListIiE[vtable for AList]+0xc): undefined reference to `AList::insert(int const&)'rn/tmp/cc5kzKtg.o:(.rodata._ZTV5AListIiE[vtable for AList]+0x10): undefined reference to `AList::append(int const&)'rn/tmp/cc5kzKtg.o:(.rodata._ZTV5AListIiE[vtable for AList]+0x14): undefined reference to `AList::remove(int&)'rn rn顺便求大虾指教一下怎么写个makefile文件出来，谢谢。rn

关于string的问题 undefined reference to `strrequirParam1': undefined reference to `strrequirParam1'，strrequirParam1是我定义的一个string 的实体，

关于gcc “undefined reference to _imp___xxx_”的问题: http://www.cnblogs.com/blue.net/archive/2009/07/22/1528615.htmlrnrn我按照这个网页做了一次创建DLL编译，但是在执行rnrngcc -o dllHello.exe dllHello.o -L./ -ltstdllrnrn后，产生了rnrnundefined reference to '_imp___tstfunc_' 的错误。rnrn请问是什么原因，该怎么解决

(菜鸟飞飞)undefined reference的问题: 程序：rn[code=C/C++]rn#include rn#include rn#include rn#include rn#include rn#include rn#include rn#define BUFFER_MAX 2048rnrnint main(int argc, char *argv[])rnrn rn int sock, n_read, proto; rn char buffer[BUFFER_MAX];rn char *ethhead, *iphead, *tcphead, rn *udphead, *icmphead, *p;rn rnif((sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_IP))) < 0)rn rn fprintf(stdout, "create socket error\n");rn exit(0);rn rn rnwhile(1) rnrn n_read = recvfrom(sock, buffer, 2048, 0, NULL, NULL);rn /*rn 14 6(dest)+6(source)+2(type or length)rn +rn 20 ip header rn +rn 8 icmp,tcp or udp headerrn = 42rn */rnif(n_read < 42) rn rn fprintf(stdout, "Incomplete header, packet corrupt\n");rn continue;rn rn rn ethhead = buffer;rn p = ethhead;rn int n = 0XFF;rn printf("MAC: %.2X:%02X:%02X:%02X:%02X:%02X==>"rn "%.2X:%.2X:%.2X:%.2X:%.2X:%.2X\n",rn p[6]&n, p[7]&n, p[8]&n, p[9]&n, p[10]&n, p[11]&n,rn p[0]&n, p[1]&n, p[2]&n,p[3]&n, p[4]&n, p[5]&n);rnrn iphead = ethhead + 14; rn p = iphead + 12;rn rn printf("IP: %d.%d.%d.%d => %d.%d.%d.%d\n",rn p[0]&0XFF, p[1]&0XFF, p[2]&0XFF, p[3]&0XFF,rn p[4]&0XFF, p[5]&0XFF, p[6]&0XFF, p[7]&0XFF);rn proto = (iphead + 9)[0];rn p = iphead + 20;rn printf("Protocol: ");rn switch(proto)rn rn case IPPROTO_ICMP: printf("ICMP\n");break;rn case IPPROTO_IGMP: printf("IGMP\n");break;rn case IPPROTO_IPIP: printf("IPIP\n");break;rn case IPPROTO_TCP :rn case IPPROTO_UDP : rn printf("%s,", proto == IPPROTO_TCP ? "TCP": "UDP"); rn printf("source port: %u,",(p[0]<<rn[root@localhost C]#rnrn却报了这么多错误。为题在哪里呢？谢谢大牛们了！！

[Linker error] undefined reference to `*::*' 的问题: 有两个比较大的类rn然后就提示链接错误rnrn[Linker error] undefined reference to `*::*'rnrn其中的*号是类名和构造函数，错误的地方在主函数。rn构造函数有声明没定义。而且这两个类的头文件都被包含进来的。rn实在找不出问题出在哪里了？rn高人，高人，在哪里？

*****SOS***undefined reference to `__ctype_b' 问题********: 在编译sybase 的example时出现的In function `db__crs_search_phrase':rn: undefined reference to `__ctype_tolower'rnrn执行makefile后rncc -I. -I/home/sybase/OCS-12_5/include -L/home/sybase/OCS-12_5/lib -L/usr/lib example1.c /home/sybase/OCS-12_5/lib/libsybdb.a /home/sybase/OCS-12_5/lib/libsybtcl.a /home/sybase/OCS-12_5/lib/libintl.a -lm -o example1rnrn我的linux 是fc3 版本，有人说是glibc的版本问题，但不知怎么解决。rn

链接过程中的 undefined reference to 问题: 链接中的undefined reference to问题： rnrn用 gcc 链接链接语句： gcc main.o -o main -L/home/lh/cnooc/lib -lall -lxsrc rnrn错误： rn在 /home/yc/lh/lib/libxsrc.a(其中 apexec.o 在 libxsrc.a 库中 ): In function `apexec': rn中出现错误: rn/home/yc/lh/xsrc/apexec.c:62: undefined reference to `gettxta' rn就是说我的 apexec.c 中没有定义 gettxta 函数 rn但是这个函数在 liball.a 库里已经包含了，为什么还会出现这个错误！ rnrn希望说清楚了，各位有什么建议或解决办法？

undefined reference to"问题，求帮助！！！！！！～～～">"undefined reference to"问题，求帮助！！！！！！～～～: 问题一：rn[code=c]rn#include "mainwindow.h"rn#include "ui_mainwindow.h"rn#include rn#include rnrnMainWindow::MainWindow(QWidget *parent) :rn QMainWindow(parent),rn ui(new Ui::MainWindow)rnrn ui->setupUi(this);rnrnrnMainWindow::~MainWindow()rnrn delete ui;rnrnrnvoid MainWindow::on_pushButton_clicked()rnrn mysound = new QSound("houlai.wav");rn mysound->play();rn[/code]rnrnerror::../test/mainwindow.cpp:21: error: undefined reference to `QSound::QSound(QString const&, QObject*)'rnerror::../test/mainwindow.cpp:22: error: undefined reference to `QSound::play()'rn[color=#FF0000]这个错误是怎么回事啊，头文件也添加了啊，要疯了。。。。[/color]rnrn问题二：rn[color=#FF0000]本来是想做个声卡编程的应用程序，下载了ALSA驱动，也apt-get install liasound2-dev,rn头文件#include rn#include rn#include 也添加了，并且我ctrl 点击头文件也能找到rn可是也是rnerrro:../playertest2/playsound.cpp:66: error: undefined reference to `snd_pcm_open' (注：snd_pcm_open是中函数）rn这是我什么东西没有设置的事么？？[/color]rn开发环境：rn新装的Ubuntu 12.04 ，Qt5.2.1,qtcreat 3.0rnrn问题三：rn这么在编辑器中输入中文啊。。。rnrn在线跪等啊。。。。。。。。。。。。T_T~~~~~~~~~~~~~rnrn

很烦人的问题：undefined reference to??: 哪位兄弟告诉我rnundefined reference to 'itoa' 要 -l什么库？rnrn哪位帮忙帖一些常用的库来解决这些问题。

gcc编译问题请教。。。undefined reference to: 一个system C(其实就是CPP的一个扩展）程序。编译rnrngcc -c没有问题　但是gcc　-o　就不行了报错如下，谁给看看，谢谢。rnrnrn/usr/lib/gcc-lib/i386-redhat-linux/2.96/../../../crt1.o: In function `_start':rn/usr/lib/gcc-lib/i386-redhat-linux/2.96/../../../crt1.o(.text+0x18): undefined reference to `main'rn/tmp/ccZKFTjj.o: In function `sc_main':rn/tmp/ccZKFTjj.o(.text+0x5b): undefined reference to `sc_module_name::sc_module_name(char const *)'rn/tmp/ccZKFTjj.o(.text+0x8d): undefined reference to `sc_module_name::sc_module_name(char const *)'rn/tmp/ccZKFTjj.o(.text+0xbf): undefined reference to `sc_module_name::sc_module_name(char const *)'rn/tmp/ccZKFTjj.o(.text+0x15b): undefined reference to `sc_module::operator<<rncollect2: ld returned 1 exit status

请教一个undefined reference to的问题: 有一个程序P，它是由a.so, b.so和一些.cc, .h文件生成的。其中a.so与b.so的类互有引rn用。一开始编译正常。当我在生成a.so的文件里加了一些函数，这些函数引用了b.so的源rn文件。再次编译就出现了undefined reference to的错误，未定义的引用都是我在a.so里rn新加入的b.so里的函数。由于我初学linux下的c++编程，没有相关的经验。希望各位能给rn我说一下可能导致这种情况的原因。我在网上查到的方法都没办法解决。谢谢！

编译问题 undefined reference to `mysql_free_result': 编译命令：rnc++ -Wall -g -D_GNU_SOURCE -lresolv -lpthread -I/usr/include/mysql -L/usr/lib/mysql -lmysqlclient -lnsl libmudos.a -o esiirnrn/usr/include/mysql 和 /usr/lib/mysql目录下有头文件和库文件rnrn但是编译始终出现如下错误信息：rn/home/cntop/ccmud_liunx/setup_npc/../npc/wiz/wiz_hanshueiyu.h:383: undefined reference to `CRoom::remove_doors(char const *)'rn/home/cntop/ccmud_liunx/setup_npc/../npc/wiz/wiz_hanshueiyu.h:383: undefined reference to `mysql_real_query'rnrn查资料是连接错误，但是不知道怎么解决，请教大家。

undefined reference to 这个编译出错问题: 在工程中已经把该函数的声明和定义以及该函数的调用都注释掉了，但用cmake编译还是会出现该编译问题；rnrn

严重的问题 undefined reference to `mysql_create_db': LINUX下 php-4.4.0 ，mysql4.1.8 ,apache_1.3.33 , 在对 php-4.4.0 安装的时候 make rn出现错误，找了大半天没有找到答案；有人说是 MYSQL太高，可是我不能换低于4.1版本的rn数据库；怎么办？rnrn/zend_strtod.lo Zend/zend_execute.lo sapi/cli/php_cli.lo sapi/cli/getopt.lo main/internal_functions_cli.lo -lcrypt -lcrypt -lmysqlclient -lz -lresolv -lm -ldl -lnsl -lcrypt -lcrypt -o sapi/cli/phprnext/mysql/php_mysql.o(.text+0x2116): In function `zif_mysql_create_db':rn/usr/local/php-4.4.0/ext/mysql/php_mysql.c:1163: undefined reference to `mysql_create_db'rnext/mysql/php_mysql.o(.text+0x2331): In function `zif_mysql_drop_db':rn/usr/local/php-4.4.0/ext/mysql/php_mysql.c:1205: undefined reference to `mysql_drop_db'rncollect2: ld returned 1 exit statusrnmake: *** [sapi/cli/php] Error 1rnrnrn

求教undefined reference to: 用g++编译一下代码时出现这样的问题：rn undefined reference to `Tree::Tree()'rnrn 1 #include rn 2 #include rn 3 using namespace std;rn 4rn 5 template rn 6 struct CSTnodern 7 rn 8 T data;rn 9 struct CSTnode* firstchild;rn 10 struct CSTnode* nextsibling;rn 11 struct CSTnode* parent;rn 12 ;rn 13rn 14 template rn 15 class Treern 16 rn 17 public:rn 18 Tree();rn 19 virtual ~Tree();rn 20 virtual void getParent() const=0;rn 21 virtual void getFirstChild() const=0;rn 22rn 23 ;rn 24rn 25 template rn 26 class csTree: public Treern 27 rn 28 public:rn 29 csTree();rn 30 ~csTree();rn 31 void getParent() const;rn 32 void getFirstChild() const;rn 33rn 34 private:rn 35 struct CSTnode* root;rn 36 ;rn 37rn 38 template rn 39 csTree::csTree():Tree()rn 40 rn 41 root=new CSTnode;rn 42 root->firstchild=NULL;rn 43 root->nextsibling=NULL;rn 44 rn 45rn 46 template rn 47 csTree::~csTree()rn 48 rn 49 rn 50 template rn 51 void csTree::getParent() constrn 52 rn 53 cout<<< cs;rn 66 return 1;rn 67 rn

undefined reference to `CRYPTO_malloc_init': 本人在linux系统安装apache时configure这步没问题：rn./configure --prefix=/usr/local/apache --enable-ssl --enable-rewrite --enable-so --with-ssl=/usr/local/opensslrn 但是make时遇到报错rnhttpd-2.4.20/support/ab.c:2380: undefined reference to `CRYPTO_malloc_init'rnrn请问各位大神如何解决？

编译报错 undefined reference: 一个叫 Component 的classrnrn[code=C/C++]//情况1，没有Component.cpp,光有一个Component.h，构造函数定义在其中rnclass Component rnpublic:rn Component() rn...rn;[/code]rn这样就会报rn[color=#FF0000]undefined reference to `Component::Component()'[/color]rnrn如果改成这样就okrn[code=C/C++]//情况2，同时又Component.cpp和Component.h，构造函数定义在cpp中rnrn//file Component.hrnclass Component rnpublic:rn Component();rn...rn;rnrn//file Component.cpprn#include "Component.h"rnComponent::Component() rnrn[/code]rnrnrn如果同时在h和cpp里都定义构造函数，又会出现重复定义的错误rn[color=#FF0000]redefinition of 'Component::Component()'[/color]rn[code=C/C++]//情况3，同时在cpp和h中定义构造函数rnrn//file Component.hrnclass Component rnpublic:rn Component() rn...rn;rnrn//file Component.cpprn#include "Component.h"rnComponent::Component() rnrn[/code]rnrn请问为什么情况1会报错？就是只在.h里定义构造函数。rn

undefined reference to 'pthread_create': 我在linux写下面c程序时，总是报错，说rnundefined reference to 'pthread_create'rnundefined reference to 'pthread_join'rnrn但是我看见pthread.h头文件下面有这个函数的定义啊。这是怎么回事呢？rnrnrnrn#include rn#include rn#include rn#include rn#define NLOOP 5000rnint counter;rnpthread_mutex_t counter_mutex = PTHREAD_MUTEX_INITIALIZER;rnrnvoid *doit(void *vptr)rnrn int i,val;rn for(i=0;i

NDK undefined reference to `main': 调试NDK中自带的HelloJni例子，编译的时候出现undefined reference to `main'的error，倘若我在.c中加入main函数，那是不是Android工程中就有两个程序入口点了？查了一下，“Add -shared to LD_FLAGS fixed it”，但不太明白，有大神帮个忙吗？帮我看看哪里的设置出现了问题？谢谢啊

undefined reference to 'GameLayer::createScene()': 将Cocos项目导入eclipse当中后，报这个错误，百度到说进入Android.mk添加所有cpp文件，这是什么意思，尝试了一下还是有错。。。

undefined reference to错误！: 下面的代码gcc的时候提示下面的错误，看半天没找出哪有毛病，请教高手指点！rn/tmp/ccmKb9yz.o: In function `sort':rntest.c:(.text+0x1f5): undefined reference to `merge'rncollect2: ld 返回 1rnrn[code=C/C++]rn#include rnrn#define MAXSIZE 8rnint arr[MAXSIZE] = 5, 7, 2, 1, 9, 4, 3, 8 ;rnrnvoid merger(int start, int mid, int end) rn int len1 = mid - start + 1;rn int len2 = end - mid;rn int left[len1];rn int right[len2];rn int i, j, k;rn // 相邻子序列赋值rn for (i = 0; i < len1; i++)rn left[i] = arr[start + i];rn for (j = 0; j < len2; j++)rn right[j] = arr[mid + 1 + j];rn // 合并相邻两个有序子序列rn i = j = 0;rn k = start;rn while (i < len1 && j < len2)rn if (left[i] < right[j])rn arr[k++] = left[i++];rn elsern arr[k++] = right[j++];rn // 检查是否合并完毕rn while (i < len1)rn arr[k++] = left[i++];rn while (j < len2)rn arr[k++] = right[j++];rnrnrnvoid sort(int start, int end) rn int mid;rn if (start < end) rn mid = (start + end) / 2;rn sort(start, mid);rn sort(mid + 1, end);rn merge(start, mid, end);rn rnrnrnint main(int argc, char**argv) rn sort(0, MAXSIZE - 1);rn int index = 0;rn for (index = 0; index < MAXSIZE; index++)rn printf("%d ", arr[index]);rn return 0;rnrnrnrn[/code]

undefined reference to "function...": Redhat 5.0 企业版rnEclipse 3.2 IDErnrn所有写出来的.cpp文件均生成对应.o问件，但总是构建不成功，报错说undefined reference to "function..."。rn去google了，但是很多人给出的都是诸如大小写敏感、路径设置错误、.o文件生成错误，都不能解决问题。rn请高手进来指教！！！！

undefined reference to `dlopen': 我用的是ubuntu8.04, 在eclipse下面开发C++程序rnrno_pModule = dlopen( "./libclassifier.so.1.0", RTLD_LAZY);rnm_pLoadModel = (void(*)(char*)) dlsym( o_pModule, "ClaLoadModel" );rnrn在C++代码里调用动态库时出现如下的错误:rnundefined reference to `dlopen'rnundefined reference to `dlsym'rnundefined reference to `dlsym'rnrn请问如何解决？望详细点, 谢谢

编译错误 undefined reference to '__udivdi3': 最近在调试文件系统 exfat，在将打包好的.a库文件加到工程中时出现编译错误：undefined reference to '__udivdi3'。rn在工程中直接使用源代码编译没有这个错误。在网上找了很久没有找有行之有效的方法，只有在这里寻找高手帮忙了。rn打包方法：makefile + mingw32-make.exe，同样的方法打包没有64位数除32位数的库是正常的。rn编辑器：codelitern编译器：ARM-GCCrncpu ：ARM9rn系统：无rnrn

undefined reference to `lstat': undefined reference to `lstat'rn这个编译错误说明什么，我用的是mingw，我看glibc里FAQ说是，可能缺少lib.os是这样吗。

glibc-static-2.17-55.el7.x86_64（undefined reference to `memcpy@GLIBC_2.14）: Ubuntu下安装此资源，可以解决/lib64/libstdc++.so.5: undefined reference to `memcpy@GLIBC_2.14' 这个问题

undefined reference to `_Unwind_Resume': OS:windows 7nIDE:codeblocks 12.12nc complier:mingw32-gcc.exenC++ complier:mingw32-g++.exen错误提示：undefined reference to `_Unwind_Resume'|n在IDE中运行FLTK的模板程序“hello world”时出现错误n——————————————————分割线——————————————n如下是所有错误信息：n||=== Build: Debug in fltk_test01 (compiler: GNU GCC Compiler) ===|nC:\msys\1.0\local\lib\libfltk.a(Fl_Window.o):Fl_Window.cxx:(.text$_ZN9Fl_WindowC2EiiiiPKc+0x72)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Window.o):Fl_Window.cxx:(.text$_ZN9Fl_WindowC2EiiPKc+0x80)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Window.o):Fl_Window.cxx:(.text$_ZN9Fl_WindowD2Ev+0x6e)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Window.o):Fl_Window.cxx:(.eh_frame+0x83)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.text$_ZN15Fl_Input_Choice7menu_cbEP9Fl_WidgetPv[__ZN15Fl_Input_Choice7menu_cbEP9Fl_WidgetPv]+0xfe)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.text$_ZN15Fl_Input_Choice6inp_cbEP9Fl_WidgetPv[__ZN15Fl_Input_Choice6inp_cbEP9Fl_WidgetPv]+0x87)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.text$_ZN8Fl_Group6handleEi+0x581)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.text$_ZN8Fl_GroupD2Ev+0x37)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.text$_ZN15Fl_Input_ChoiceC2EiiiiPKc+0x19c)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.eh_frame+0x157)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.eh_frame$_ZN15Fl_Input_Choice7menu_cbEP9Fl_WidgetPv+0x13)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.eh_frame$_ZN15Fl_Input_Choice6inp_cbEP9Fl_WidgetPv+0x13)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.eh_frame$_ZN10Fl_SpinnerD1Ev+0x13)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Group.o):Fl_Group.cxx:(.eh_frame$_ZN10Fl_SpinnerD0Ev+0x13)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl.o):Fl.cxx:(.text$_ZN2Fl4copyEPKciiS1_+0x196)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl.o):Fl.cxx:(.text$_ZN2Fl6optionENS_9Fl_OptionE+0x285)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl.o):Fl.cxx:(.text$_ZN2Fl6optionENS_9Fl_OptionE+0x2a3)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl.o):Fl.cxx:(.eh_frame+0xb4b)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_get_system_colors.o):Fl_get_system_colors.cxx:(.text$_ZN2Fl13reload_schemeEv+0x737)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_get_system_colors.o):Fl_get_system_colors.cxx:(.text.startup._GLOBAL__sub_I__ZN2Fl10backgroundEhhh+0xa7)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_get_system_colors.o):Fl_get_system_colors.cxx:(.eh_frame+0x157)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Window_shape.o):Fl_Window_shape.cxx:(.text$_ZN9Fl_Window13shape_pixmap_EP9Fl_Pixmap+0x64)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Window_shape.o):Fl_Window_shape.cxx:(.eh_frame+0x113)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Widget.o):Fl_Widget.cxx:(.text$_ZN9Fl_Widget11do_callbackEPS_Pv+0x5e)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Widget.o):Fl_Widget.cxx:(.eh_frame+0x30b)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Menu_Button.o):Fl_Menu_Button.cxx:(.text$_ZN14Fl_Menu_Button5popupEv+0xe9)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Menu_Button.o):Fl_Menu_Button.cxx:(.eh_frame+0x7f)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Button.o):Fl_Button.cxx:(.text$_ZN9Fl_Button19simulate_key_actionEv+0x94)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Button.o):Fl_Button.cxx:(.text$_ZN9Fl_Button6handleEi+0x3c5)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Button.o):Fl_Button.cxx:(.text$_ZN9Fl_Button6handleEi+0x3d6)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Button.o):Fl_Button.cxx:(.eh_frame+0x103)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Menu_.o):Fl_Menu_.cxx:(.text$_ZN8Fl_Menu_D2Ev+0x37)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Menu_.o):Fl_Menu_.cxx:(.eh_frame+0x2bb)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Tooltip.o):Fl_Tooltip.cxx:(.text$_ZL15tooltip_timeoutPv+0x10b)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Tooltip.o):Fl_Tooltip.cxx:(.eh_frame+0xdf)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(fl_font.o):fl_font.cxx:(.text$_ZL7fl_fontP18Fl_Graphics_Driveriii+0xf4)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(fl_font.o):fl_font.cxx:(.eh_frame+0xa3)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Image.o):Fl_Image.cxx:(.text$_ZN12Fl_RGB_ImageD2Ev+0x3c)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Image.o):Fl_Image.cxx:(.text$_ZN12Fl_RGB_ImageC2EPK9Fl_Pixmapj+0x95)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Image.o):Fl_Image.cxx:(.eh_frame+0x1f7)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Double_Window.o):Fl_Double_Window.cxx:(.text$_ZN16Fl_Double_WindowD2Ev+0x37)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Double_Window.o):Fl_Double_Window.cxx:(.eh_frame+0x4b)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Preferences.o):Fl_Preferences.cxx:(.text$_ZN14Fl_PreferencesC2EPKcS1_S1_+0x85)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Preferences.o):Fl_Preferences.cxx:(.text$_ZN14Fl_PreferencesC2ENS_4RootEPKcS2_+0x85)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Preferences.o):Fl_Preferences.cxx:(.text$_ZN17Fl_Plugin_ManagerC2EPKc+0x72)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Preferences.o):Fl_Preferences.cxx:(.text$_ZN17Fl_Plugin_Manager6pluginEi+0x7f)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Preferences.o):Fl_Preferences.cxx:(.text$_ZN17Fl_Plugin_Manager6pluginEPKc+0xa9)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Preferences.o):Fl_Preferences.cxx:(.eh_frame+0x8fb)||undefined reference to `__gxx_personality_v0'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Pixmap.o):Fl_Pixmap.cxx:(.text$_ZN9Fl_PixmapD2Ev+0x3e)||undefined reference to `_Unwind_Resume'|nC:\msys\1.0\local\lib\libfltk.a(Fl_Pixmap.o):Fl_Pixmap.cxx:(.text$_ZN9Fl_Pixmap4copyEii+0x416)||undefined reference to `_Unwind_Resume'|n||More errors follow but not being shown.|n||Edit the max errors limit in compiler options...|n||=== Build failed: 50 error(s), 0 warning(s) (0 minute(s), 1 second(s)) ===|n————————————分割线——————————————n由于我在网上找了很多相关资料，里面所说的mingw版本问题和makefile命令完全不懂，请最好能step by step讲解一下，谢谢！nn再次感谢！n

undefined reference to memset?: 请问高手如何解决undefined reference to memset，memcpy, __divsi3之类的问题？rn我用GCC编译一些嵌入式代码，可能是Makefile写得不对，连接器在链接时总是提示一些很奇怪的错误。比如我定义了一个二维数组，他就提示在数组定义的地方undefined reference to memcpy。数组定义如下：rnint array[][2]=rnrn 5, 2,rn 6, 4,rn;rn我调用memset他也说找不到，但编译时他不报错，也就是说他找到了原形，但找不到定义。尽管我include了memory.h string.h math.h等，都没有用。而我用了一个除号，他就说undefined reference to __divsi3。我也试过在连接时用了 -lm -lc，但结果一样。rn以下是MakefilernrnOBJECTS = startup.o target.o UART0.o au030.o auo30.o test.o io.o memory.o testjpeg.o jpeg.o lcd.ornLIB_DIRS = ../usr/local/arm/lib/gcc-lib/arm-linux/3.2.3/rnCC = arm-linux-gcc -vrnLD = arm-linux-ld -vrnAR = arm-linux-ar -vrnAS = arm-linux-as -vrnCP = arm-linux-objcopyrnOD = arm-linux-objdump rnCFLAG = -I./ -c -fno-common -O2 -grnAFLAG = -ahls -mapcs-32 -o startup.ornLDFLAGS = -nostartfiles --crefrnLDFLAGS += -lc -lm -Map boot.map -T link.ldsrnHEXFORMAT = -O ihexrnBINFORMAT = -O binaryrnODFLAG = -x --symsrnrnall: testrnrntest: boot.outrn @ echo "Copying..."rn $(CP) $(HEXFORMAT) boot.out boot.hexrn $(CP) $(BINFORMAT) boot.out boot.binrn $(OD) $(ODFLAG) boot.out > boot.dmprnrnboot.out: $(OBJECTS) link.ldsrn @ echo "Linking..."rn $(LD) $(LDFLAGS) $(OBJECTS) -o boot.outrn $(LD) $(LDFLAGS) $(OBJECTS) -o boot.elfrnrnstartup.o: startup.Srn @echo "Assembling..."rn $(AS) $(AFLAG) startup.S > startup.lstrn%.o: %.crn @echo "Compiling..."rn $(CC) $(CFLAG) $

undefined reference to winmain: 这是个什么问题啊rn我需要在什么环境下编译运行才可以

求助！！undefined reference to 'pthread_create': 我确定头文件已经包含了！rn#include rnrn命令为 gcc beiwang.c -o beiwang -lpthreadrnrn可结果还是如图示：rnrn[img=E:\快照-1.jpg][/img]

undefined reference to `filename': [code=C/C++]rn// main.crn#include rn#include "file.h"rnrnint main()rnrn printf("%s\n", filename);rn return 0;rnrn[/code]rn[code=C/C++]rn// file.hrn#ifndef FILE_H_INCLUDEDrn#define FILE_H_INCLUDEDrnrnextern char filename[];rnrn#endif // FILE_H_INCLUDEDrn[/code]rn[code=C/C++]rn#include "file.h"rnchar filename[] = "/etc/passwd";rn[/code]rnrn[code=C/C++]rn// error rnobj\Debug\main.o||In function `main':|rn\test\main.c|6|undefined reference to `filename'|rn||=== Build finished: 1 errors, 0 warnings ===|rn[/code]

undefined reference to...: 在LINUX下，eclipse + cdt + qt-eclipse-plugin下写代码，rn很简单的一条语句，pcap_findalldevs(&alldevs,errbuf)，调用libpcap里面的函数，rn但是编译提示错误：rn[color=#FF0000]undefined reference to `pcap_findalldevs'[/color] rn在网上找到的答案是，连接的时候找不到库，可以修改make文件，添加库文件的路径就好了，rn但是我的make文件是开发环境生成的，无法手动修改，在make文件里找到如下内容：rnLIBS = $(SUBLIBS) -L/usr/local/Trolltech/Qt-4.3.4/lib -lQtGui （后面内容省略）rn这个是make文件声明的link时的库文件路径信息rn发现只能从SUBLIBS这个变量上做文章了，但是这个文件，我自己找遍了系统的环境变量配置也没找到rn不知道在哪里定义的，望高手指教，不生感激。rn

undefined reference to错误。: g++.exe F:\programme\ll.o -o F:\programme\ll.exe -Wall -fpermissive -Wno-sign-compare -grnF:\programme\ll.o(.text+0x29d): In function `ZN7Account4rateEd':rnF:/programme/ll:27: undefined reference to `Account::interestRate'rncollect2: ld returned 1 exit statusrnFailurernrnrn这是错误提示。请大家帮帮忙

undefined reference to `DES_cfb64_encrypt': 有头文件 rn#include rn#include rn#include "sysclass/base_func.h"rn 14 #include "crypt.h"rn 15 #include rn 16 #include rn 17 #include rn 18 #include rn 19 #include rn 20 #include rn 21 #include rnrnrn出现错误 undefined reference to `DES_cfb64_encrypt'rnrn求解！

Linux下undefined reference to错误: 各位：我在写一个双向链表程序。里面有一个FindElebyIndex 函数，是用来查找链表中指定序号元素的，但是我在编译连接时提示如下错误:rn/tmp/ccSh2r0h.o: In function `main':rnDoubleLinkList.c:(.text+0x2ee): undefined reference to `FindEleByIndex'rncollect2: ld returned 1 exit statusrnrn我使用的命令是rngcc DoubleLinkList.c -o DoubleLinkListrnrn然而我把这个函数注释后重新编译通过，然后取消注释，编译也通过，并且运行结果正确。可是不知这里面发生了什么。请有过类似经验的大牛告诉我为什么会这样。为什么注释后编译链接，再取消注释重新编译链接就好了呢？rn我在网上搜这个错误，说是链接错误，但不知道错在了那里。rnrn这是我的源代码：rn//2011/05/08rn//DoubleList的实现和基本操作。包括查找，删除，增加等。rnrn#includern#includernrn#define True 1rn#define False 0rn#define null NULLrnrntypedef struct DNodernrn int data;rn struct DNode* prior; //前驱结点rn struct DNode* next; //后继结点rnDLinkList;rnrn//void PrintDl(DLinkList* dl);rnrn//头插法建表rnint CreateDoubleLinkList_head(DLinkList *dl,int n)rnrn DLinkList* s;int i;rn dl->next=null;rn dl->prior=null;rn for(i=0;idata));rn s->next=dl->next; //s的前驱指向下一个结点rn s->prior=dl; //s插入头结点之后 rn dl->next=s; //dl指向刚插入的结点 rn if(s->next!=null)rn rn s->next->prior=s; //若插入结点的下一个结点不为空，则后继结点的前驱指针域指向srn rn //printf("%d\n",dl->data);rn rn // PrintDl(dl);rn return True;rnrnrn//尾插法rnint CreateDoubleLinkList_tail(DLinkList *dl,int n)rnrn DLinkList *s,*r;rn int i=0;rn dl->next=null;rn dl->prior=null;rn r=dl;rn for(i=0;idata));rn r->next=s; //插入尾结点之后rn s->prior=r; //修改s的前驱指针域rn r=s;rn rn r->next=null; //尾结点next域设为空rn return True;rnrnrn//这里貌似出了一个链接错误：rn///tmp/ccSh2r0h.o: In function `main':rn//DoubleLinkList.c:(.text+0x2ee): undefined reference to `FindEleByIndex'rn//collect2: ld returned 1 exit statusrn//不知是何原因，重新注释这个函数后就正确了。rn//按序号查找第n个元素rnint FindElebyIndex(DLinkList* dl,int index,int *element)rnrnrn int i=0;rn DLinkList* s=dl;rnrn while(s!=null&&inext;rn rnrn if(s==null)rn rn return False;rn rnrn *element=s->data;rnrn return True;rnrnrn//Print DLrnvoid PrintDl(DLinkList* dl)rnrn DLinkList* s=dl->next;rn while(s!=null)rn rn printf("%d\n",s->data);rn s=s->next;rn rnrnrn//Testrnint main()rnrn //头插法建表rn DLinkList* dl =(DLinkList*)malloc(sizeof(DLinkList)); //建立带头结点的双向链表rn printf("输入你想要建表的结点个数：\n");rn int num=0;rn scanf("%d",&num);rn printf("输入这%d数：\n",num);rn CreateDoubleLinkList_head(dl,num);//头插法建表rn printf("链表中有的元素为：\n");rn PrintDl(dl);rn printf("====================================================\n");rn //尾插法建表rn DLinkList* doublelist=(DLinkList*)malloc(sizeof(DLinkList)); //建立带头结点的双向链表rn printf("输入你想要建表的结点个数：\n");rn int count=0;rn scanf("%d",&count);rn printf("输入这%d数：\n",count);rn CreateDoubleLinkList_tail(doublelist,count);//头插法建表rn printf("链表中有的元素为：\n");rn PrintDl(doublelist);rn //查找第n个元素并打印rn int n;rn printf("输入你想找的元素序号:");rn scanf("%d",&n);rn int x=0;rn int *e=&x;rn FindElebyIndex(doublelist,n,e);rn printf("您想找的元素为:%d\n",*e);rnrn return 0;rnrnrn

undefined reference to `OCILogon': ./lib.so: undefined reference to `OCILogon'rn./lib.so: undefined reference to `OCIEnvCreate'rn./lib.so: undefined reference to `OCIHandleAlloc'rn需要包含什么头文件？

undefined reference to `clock_gettime': rnrn查找了一些资料，说：rn这个错误通常是因为链接选项里漏了-lrt，但有时发现即使加了-lrt仍出现这个问题，使用nm命令一直，会发现-lrt最终指向的文件没有包含任何symbol，这个时候，可以找相应的静态库版本librt.a，看看它里面是否存在`clock_gettime'。rn提示：使用/usr/lib/x86_64-linux-gnu/librt.a替代-lrtrnrnrn问题：但是我的目录下根本没有 /usr/lib/x86_64-linux-gnu/librt.a 文件啊~怎么装？？

codeblocks 报错Undefined reference to: 想要gcc编译工程给linux用rn报下面错可是明明头文件给了静态库也连接了 o文件也生成了右键 find decalaration也能找到相应头文件中的定义rn[img=https://img-bbs.csdn.net/upload/201906/20/1560999189_635135.png][/img]rnrn另外[url=https://www.cnblogs.com/Bonker/p/3549140.html][/url] 这个里面的这个问题我也看了rn所有的cpp文件都生成了o文件rn[img=https://img-bbs.csdn.net/upload/201906/20/1560999237_789872.png][/img]rn设置也没问题rnrnrn[face]monkey:50.gif[/face]rn第一次用这个ide 真的找不到问题 有没有遇到过这个问题的帮忙排查一下

求助：undefined reference to `pcre_compile': Ubuntu 12.04 LTSrnrn通过apt-get install libpcre3 libpcre3-dev安装pcre，安装后，pcre.h在/usr/include/pcre.hrnrn程序中，#include rnrngcc -Wall -I/usr/include -I/usr/local/include -L/lib -L/usr/lib -L/usr/local/lib -lpcre 5.c，有如下提示：rn5.c.text+0x54): undefined reference to `pcre_compile'rn5.c.text+0x7d): undefined reference to `pcre_study'rn5.c.text+0xf2): undefined reference to `pcre_exec'rn5.c.text+0x10: undefined reference to `pcre_free_study'rn5.c.text+0x10e): undefined reference to `pcre_free'rnrn怎么解决？

undefined reference to 'pthread_cond_signal': rnundefined reference to 'pthread_cond_signal'rnrn我的编译命令是 cc -pthread example.crnrn-lphtread也用过了，报的错是一样的rnrn在网上也无论如何找不到答案rnrn求助了，谢谢！到底怎样才能正确使用pthread_cond_signal呢？我明明在/usr/include/pthread.h中看到有pthread_cond_signal函数的声明啊

Dev C++ undefined reference to: 在头文件 JCDLinkList.h 中定义了一个函数，在源文件 JCDLinkList.c 中实现了它，rn在 main.c中调用这个函数时，提示 undefined reference to 函数名。rnrn/* rn *file JCDLinkList.hrn *------------------rn *这个文件JCD写的链表定义操作的接口文件rn *2006-7-23rn */rnrn#ifndef _JCDLinkList_h rn#define _JCDLinkList_h rnrn#include rn#include rnrnrnrnrn/* rn *链表的数据类型定义rn */ rnrntypedef struct node NODE;rntypedef NODE *LinkList;rnrn/*rn *创建一个新的链表rn *函数 CreateListrn *用法 NewLinkList = CreateList rn */rnrnrnrnLinkList CreateList();rnrn/*rn *输出一个链表rn *函数 PrintListrn *用法 PrintList(P); rn */rnrnvoid PrintList(LinkList X); rnrnvoid PrintTest();rnrnrn#endifrn rnrnrn/*rn *file JCDLinkList.crn *------------------rn *这个文件实现JCDLinkList.h中的定义rn */rn rnrn#include rn#include rn#include "JCDLinkList.h"rnrnstruct nodernrn int data;rn struct node *next;rn;rnrn/* 创建链表 */ rnLinkList CreateList()rnrn LinkList head,tail,P;rn head = tail = NULL;rn int n;char c;rn printf("input data \n");rn while (scanf("%d",&n)>0)rn rn P = (LinkList) malloc (sizeof(NODE));rn P->data = n;rn P->next = NULL;rn if (head == NULL)rn rn head = P;rn tail = head;rn rn elsern rn tail->next = P;rn tail = tail->next; rn rn rn dorn rn scanf("%c",&c); rn rn while (c!= '\n');rn return head;rnrnrn/*rn *打印链表rn */rn rnvoid PrintList(LinkList X)rnrn LinkList P;rn P = X;rn while (P!= NULL)rn rn printf("%d\n",P->data);rn P = P->next; rn rn printf("\n"); rn rnrnvoid PrintTest()rnrn printf("This Is A Test"); rnrnrnrnrnrn/*rn *main.c rn *主程序 rn*/rnrnrn#include rn#include rn#include "JCDLinkList.h"rnrnint main(int argc, char *argv[])rnrn rn LinkList P;rn /*P = CreateList(); */rn PrintTest();rn rn return 0;rnrnrnrnrnrn大家帮我看看，实在困扰我太久了。rnrnrn

类成员函数找不到undefined reference to: 定义了一个类，有一个函数时返回一个vector。rnrn------rnStaAgent.hrn------rnrnusing Ssid_t = struct rnstd::string ssid;rn;rnrnclass StaAgent rnpublic:rnvector scanSsid();rn...rnrnrn在StaAgent.cpp里定义了此函数的实现rnrn------rnStaAgent.cpprn------rnrnrnvector StaAgent::scanSsid()rnrn...rnrnrnrn在另一个文件里调用这个rnrn#include "StaAgent.h"rn...rnvoid StaDialog::cn_scanSsidBt_clicked()rnrnauto _sa = new StaAgent();rnauto ssids = _sa->scanSsid();rn...rnrnrn链接的时候显示undefined reference to StaAgent::scanSsid()rnrng++ -Wl,-O1 -Wl,-rpath,/opt/Qt5.1.0/5.1.0/gcc_64 -Wl,-rpath,/opt/Qt5.1.0/5.1.0/gcc_64/lib -o StaTest main.o StaAgent.o StaDialog.o moc_StaDialog.o -L/opt/Qt5.1.0//5.1.0/gcc_64/lib -lQt5Gui -lQt5Widgets -lQt5Core -lGL -lpthreadrnStaDialog.o: In function `StaDialog::cn_scanSsidBt_clicked()':rnStaDialog.cpp:(.text+0x1d2): undefined reference to `StaAgent::scanSsid()'rncollect2: error: ld returned 1 exit statusrnrnrnrn----------------------------------rn首先，链接文件里能找到StaAgent.orn然后使用nm -C StaAgent.orn在输出里，找不到StaAgent::scanSsid()这个符号。

qtopia编译出错undefined reference to: 为什么我编译一直出现类似的错误，怎么改。。。rn-lqtopia2 -lqtopia -lqpe -L/qtopia/qtopia-free-2.2.0/qtopia/lib -L/qtopia/qt-2.3.10/lib -lqtern.obj/release-shared/callover.o(.text+0x6dd): In function `Callover::closethisDialog()':rn/qtopia/qtopia-free-2.2.0/qtopia/src/applications/mycall/callover.cpp:58: undefined reference to `Callover::CalloverOperate(int)'rncollect2: ld returned 1 exit statusrnmake[1]: *** [mycall] Error 1rnmake[1]: Leaving directory `/qtopia/qtopia-free-2.2.0/qtopia/src/applications/mycall'rnmake: *** [all] Error 2rnrn找到callover.cpp（58行）rn yesbtn=new QPushButton(this);rn yesbtn->setPixmap(QPixmap(QPEApplication::qpeDir()+ "pics/mycall/yes.png"));rn layout4->addMultiCellWidget(yesbtn,3,3,1,1);rn connect(yesbtn,SIGNAL(clicked()),this,SLOT(closethisDialog(void)));rn......rnvoid Callover::closethisDialog(void)rnrn emit(CalloverOperate(0)); //58行rn this->close();rnrn在callover.h里面定义的这个信号rnsignals:rn void CalloverOperate(int);rn发现如果把58行注释掉，则编译运行都可以，但点击button没反应，也就是说槽函数没有起作用，窗口也一直停在第四界面。rn检查mycall.pro文件，.cpp和.h都包含进来了，再检查callover.cpp、callover.h头文件，基本都跟前面一样的，也没有什么可添加了，不知道哪里出错了？

undefined reference to winmain@16'错误！: #include rnrnint mian(void)rnrn printf("the begin\n");rn goto end;rnrn printf("hello world");rnend:rn printf("the end\n");rn return 0;rnrnrnrn有一个错误“undefined reference to winmain@16” 这是为什么呢？

报错 undefined reference to: 出错的代码void MediaFlySetting::menuClicked(int id)rnrn MediaflySettingResultView *view = new MediaflySettingResultView(_user->getValueId(), _psword->getValueId(), g_MainWindow);rn g_MainWindow->showView(view);rnrnrn报错rnMediaflySetting.cpp:(.text+0x2080): undefined reference to `MediaflySettingResultView::MediaflySettingResultView(QString, QString, QWidget*)'rnrnrn我引入了头文件啊：#include "MediaSettingResultView.h"rnMediaflySettingResultView(QString user, QString psword, QWidget *parent = 0);

undefined reference to怎么解决: undefined reference to 'insert const*,Nodeconst *')'rn其中，Node是一个模版类，insert是该类中的一个成员函数，这个问题应该怎么解决，求赐教！！

undefined reference to 链接错误: 没法贴附件，只能直接贴源码了，在编译时，遇到了链接错误，请各位大侠指正：rn这是一个GOF composite 模式的示意代码：rnrn[color=#FF0000]composite.h //该文件定义composite类，是个模板类[/color][b][/b]rn[code=C/C++]rn#ifndef _COMPOSITE_H_rn#define _COMPOSITE_H_rn#include rnrnnamespace GoFPatternsrnrn using namespace std;rn templatern class Composite : public Componentrn rn public:rn Composite();rn virtual ~Composite();rn void addChild(Component* pchild);rn void removeChild(Component* pchild);rn void clear();rn protected:rn vector children_;rn ;rnrnrn#endifrnrn[/code]rnrncolor=#FF0000]composite.cpp[/color][b][/b]rn[code=C/C++]rn#include rn#include "composite.h"rnrnnamespace GoFPatternsrnrn using namespace std;rn rn// typedef typename vector::iterator ChildIterator;rn rn templatern Composite::Composite()rn rn ;rn rn templatern Composite::~Composite()rn rn ;rn rn templatern void Composite::addChild(Component* pchild)rn rn assert(pchild!=NULL);rn typename vector::iterator itr = find(children_.begin(),children_.end(),pchild);rn if(itr == children_.end())rn rn children_.push_back(pchild);rn rn rn rn templatern void Composite::removeChild(Component* pchild)rn rn assert(pchild!=NULL);rn typename vector::iterator itr = find(children_.begin(),children_.end(),pchild);rn if(itr != children_.end())rn rn children_erase(itr);rn rn rn rn templatern void Composite::clear()rn rn children_.clear();rn rnrnrn[/code]

undefined reference to CException....: 一个程序模块，五个文件夹。base、param、proc编译都正确，而且生成的库放在了lib。编译app下的文件报错。错误是proc文件夹下的DbInterface.cpp undefined reference to CException::CException(char*,int,char const*,...). CException.cpp在param文件夹下。DbInterface.h已经包含了CException.h。是哪里问题？如何解决？

error: undefined reference to 'wcstombs': rnE:/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe: jni/libfudx.a(FileBase.o): in function CUdxWchar::CpyFrom(wchar_t*):E:/FUdx_Android//jni/../jni/FastUdx/build/android/../../FileBase.h:88: error: undefined reference to 'wcstombs'rnrnrn用的别人的.a 文件我这里根本没有FileBase.h。rnrn怎么处理啊..？？

undefined reference to '_accept': accept是socket.h里面声明的一个函数。它对应的库文件是libc.a吗?还是其他的库文件(我想要静态的)?rn这个链接错误还有别的解决方法吗?

undefined reference to 'WinMain': #define YES 1rn#define NO 0rnrnint htoi(char s[])rnrn int hexdigit,i,inhex,n;rn rn i = 0;rn if(s[i] == '0')rn ++i;rn if(s[i] == 'x'||s[i] == 'X')rn ++i;rn rn rn n = 0;rn inhex = YES;rn for( ; inhex == YES;++i)rn if(s[i]>='0'&&s[i]= 'a'&&s[i]= 'A'&&s[i]rn哪位老师能给解释一下这是什么情况吗？

求助：undefined reference to `pow': #include rn#include rnrnint main()rnrn double a = 10.0,b = 3.0;rn float c;rn c = pow(a,b);rn printf("%f\n",c);rnrn编译结果：rn/tmp/ccibw7gz.o: In function `main':rntest.c:(.text+0x2d): undefined reference to `pow'rncollect2: ld returned 1 exit statusrn这是怎么回事？ /usr/include/下面也有math.h这个文件

QT出现“undefined reference to `vtable for’”问题的原因及解决方法: 在添加新文件时系统没有自动添加 Q_OBJECT宏定义，导致编译时qt没有创建moc_xx 文件(用来实现信号槽机制的文件)，那么在手动添加Q_OBJECT宏定义后，清除再执行qmake，最后构建一下即可。 ...

freetype-2.4.6.tar.bz2 undefined reference to `FT_Library_SetLcdFilter': /opt/QtSDK/Desktop/Qt/474/gcc/lib/libQtGui.so:-1: 错误:undefined reference to `FT_Library_SetLcdFilter'

undefined reference to `Module32First@8'??: 程序如下:rn[code=C/C++]rn#include rn#include rn#include rnusing namespace std;rnrnint main(void)rnrn MODULEENTRY32 me32=0;rn HANDLE hModuleSnap=::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE,0);rn rn if(hModuleSnap==INVALID_HANDLE_VALUE)rn return -1;rn me32.dwSize=sizeof(MODULEENTRY32);rn if(::Module32First(hModuleSnap,&me32))rn rn dorn rn cout<，还显示未定义？

undefined reference to `__aeabi_unwind_cpp_pr0: 在uboot中想用yaffs2命令，enable CONFIG_YAFFS2 之后，就出现了错误： rn/usr/local/arm-linux-4.1.1/bin/../lib/gcc/arm-iwmmxt-linux-gnueabi/4.1.1/libgcc.a(_divdi3.o):(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr0'rnrn不知道这是什么错误？rnrn我也试过换成GCC-4.3.2，编译是能够通过，但是image烧到板子上之后，很多数字突然都变成了 0 。比如： RAM的数值，nand的timing.

codeblocks提示undefined reference ……: 用c++在codeblocks中实现一个超长数值的加法和乘法运算，共有三个文件：VeryLong.h,VeryLong.cpp,main.cpprnrn//VeryLong.h部分代码rnclass VeryLongrnrnprivate:rn char vlstr[SZ];rn int vlen;rn ……rnpublic:rn void putvl() const;rn void getvl();rn ……rn;rnrn//VeryLong.cpp部分代码rnvoid VeryLong::getvl()rnrn cout << "Enter the number:";rn cin >> vlstr;rn vlen = strlen(vlstr);rn strrev(vlstr);rnrnmain中调用时rn VeryLong vl;rn vl.getvl();rn编译，提示错误：undefined reference to 'VeryLong::getvl()'rnrn

undefined reference to怎么解决的？: "undefined reference to"怎么解决的？rn有下面几个文件：rntiwei@tiwei-desktop:~/graph$ lsrnbinet.cpp global.cpp graph.cpp group.cpp main_1.cpp node_graph.cpp partition.cpp support.cpprnbinet.hpp global.hpp graph.hpp group.hpp Makefile node_graph.hpp partition.hpp support.hpprntiwei@tiwei-desktop:~/graph$rn其中：rngraph.cpp和partition.cpp引用了global.cpp中定义的GetNodeDict()函数,在rngraph.cpp和partition.cpp中都使用了#include "global.hpp".rnrn下面是我的Makefile文件：(我是改写别人的Makefile文件)rnCC = g++rnrnCFLAGS = -grnrnINCLUDE = -I. -I/usr/include/ -I/usr/include/X11/ -I/usr/local/inclucdernrnLDFLAGS = -L. -L/usr/lib -L/usr/lib/X11 -L/usr/local/librnrnLDLIBS = -L. -lprng -L/usr/lib -lmrnrnSRCS = \rnglobal.cpp graph.cpp group.cpp node_graph.cpp partition.cpp support.cpp \rnmain_1.cpprnrnOBJS = \rnglobal.o graph.o group.o node_graph.o partition.o support.o main_1.ornrn.c.o:rn $(CC) $(DEFS) $(INCLUDE) $(CFLAGS) -c $, std::allocator >, void*)'rngraph.o: In function `graph::ClearAdjacencies()':graph.cpp:(.text+0x1df2): undefined reference to `GetNodeDict(std::basic_string, std::allocator >, void*)'rnpartition.o: In function `partition::MapPartToNet(graph*)':partition.cpp:(.text+0x232f): undefined reference to `GetNodeDict(std::basic_string, std::allocator >, void*)'rnpartition.o: In function `partition::partition(graph*, double, double, double, double, int, char, int, char, prng*)':partition.cpp:(.text+0x3da9): undefined reference to `GetNodeDict(std::basic_string, std::allocator >, void*)'rnpartition.o: In function `partition::partition(graph*, double, double, double, double, int, char, int, char, prng*)':partition.cpp:(.text+0x58c3): undefined reference to `GetNodeDict(std::basic_string, std::allocator >, void*)'rncollect2: ld returned 1 exit statusrnmake: *** [main] Error 1rntiwei@tiwei-desktop:~/graph$rnrn

undefined reference to `fmemopen': undefined reference to `fmemopen'rnrnmake时出现此问题，但相关头文件也包含了，extern也写了：rnrn#include rnextern "C" FILE *fmemopen (void *__s, size_t __len, __const char *__modes) __THROW;rnrn不知是哪个库没添加，网上都找不到，希望了解的同学能帮帮忙，感激不尽！rn

undefined reference to `msktemp': [code=C/C++]rn/*rn * seek.c - Using lseek, fsync, and ftruncatern*/rnrn#include rn#include rn#include rn#include rn#include rn#include rnrnint main(void)rnrn char ftmp[] = "tmpXXXXXX";rn char buf[10];rn struct stat statbuf;rn int i, infd, outfd;rn rn /* open the input file */rn if((infd = open("devices.txt", O_RDONLY)) < 0) rn perror("open devices.txt");rn exit(EXIT_FAILURE);rn rn rn /* create a temporary file for output */rn if((outfd = msktemp(ftmp)) < 0) rn perror("msktemp");rn exit(EXIT_FAILURE);rn rn printf("output file is %s\n", ftmp);rn rn /* set the initial location in the file */rn lseek(infd, 100, SEEK_SET);rn rn /*rn * copy the first ten out of every 100 bytes to the output filern */rn for(i = 0; i < 10; ++i) rn read(infd, buf, 10);rn write(outfd, buf, 10);rn lseek(infd, 90, SEEK_CUR); /* jump forward bytes */rn rn rn /* show size before and after ftruncate */rn fstat(outfd, &statbuf);rn printf("before ftruncate, %s is %ld bytes\n", ftmp, statbuf.st_size);rn ftruncate(outfd, statbuf.st_size / 2);rn fsync(outfd);rn fstat(outfd, &statbuf);rn printf("after ftruncate, %s is %ld bytes\n", ftmp, statbuf.st_size);rn rn /* close temp and get outta here*/rn close(infd);rn close(outfd);rn exit(EXIT_SUCCESS);rnrnrnrn[/code]rnrn[root@localhost io]# gcc seek.c -o seekrn/tmp/cceGBTGT.o(.text+0x7c): In function `main':rn: undefined reference to `msktemp'rncollect2: ld returned 1 exit statusrn查了好多遍程序了，没找到错误在哪里，谁帮我看看吧。

undefined reference to luaL_newstate: ![programming in lua 中的代码，我在我的环境里(ubuntu)编译这段代码提示如标题的错误，问题出在链接这一步，gcc -c （compile and assemble, but do not link）可以通过](https://img-ask.csdn.net/upload/201805/06/1525610617_641301.png)rnrnrnrnprogramming in lua 中的代码，我在我的环境里(ubuntu)编译这段代码提示如标题的错误，问题出在链接这一步，gcc -c （compile and assemble, but do not link）可以通过rnrn自己查了一些，有说要加extern “C” 把#include 的几个lua头文件包含起来的，我试了，没效果~

undefined reference真头疼: Enviroment：Ubuntu 12.04rnTools：gcc GNUmakernrn最近看Zed A. Shaw的《Learn C The Hard Way》,遇到一个找不到库函数的问题，单元测试编译不通过，提示undefined reference：rnrn文件结构：rn.rn├── binrn├── buildrn│ ├── liblcthw.a (由list.o编译而来)rn├── Makefilern├── srcrn│ └── lcthwrn│ ├── dbg.hrn│ ├── list.crn│ ├── list.hrn│ └── list.orn└── testsrn ├── list_tests.crn ├── minunit.hrn └── runtests.shrnrnlist_tests.c的头部如下：rn#include "minunit.h"rn#include rn#include rnrnMakeFile的CFLAGS=-g -O2 -Wall -Wextra -Isrc -rdynamic -DNDEBUG $(OPTFLAGS)rnrn但是在把list_tests.c和liblcthw.a编译成list_tests时，总是不通过，提示/iblcthw/tests/list_tests.c:43: undefined reference to `List_bubble_sort'这样的错误，是不是找不到库函数？可是按照 -Isrc 和 #include应该能找到啊！

链接错误undefined reference to `SetStretchBltMode@8': [img=https://img-bbs.csdn.net/upload/201308/20/1377010735_705008.png][/img]rn我已经把 gdi32.lib的库文件放到目录下了。尝试了没用把gdi32.dll放进去也没用。rnrn我查了MSDN了这个函数是在Gdi32.lib中的。rn求大神赐教。

undefined reference to 函数名: 直接上问题：rnA.c文件里rnvoid * video()rn.....rnrnrn同一个工程里的B.c rnextern void *video()rn....rnpthread_create(&pid,NULL,video,(void *)GTK_WINDOW(win->toplevel));rn....rnrn在编译B.c文件时出现undefined reference to videorncollect2: ld returned 1 exit statusrnrn因为工程比较大所以不能单独拿b.c出来编译rn查看rnrnrn我尝试另建一个小工程编写个精简的video函数，和在另一个文件中来创建video线程则能编译通过rn可是我这个相对大的工程当中为什么就会报错呢？rnrn

undefined reference to `mencpy' 怎么回事？？: 代码里已经加了头文件，贴代码如下：rn1、dbserver.c文件：rnrn#include "dbapi.h"rn#include "socketwrapper.h"rn#include "protocol.h"rn#include rn#include rn#include rn#include rnrn#define PORT 6666rn#define IP_ADDR "127.0.0.1"rn#define MAX_BUF_LEN 1024rnrntDatabase db = NULL;rnrnint HandleRequests(tServiceHandler h);rnrnint main()rnrn /* Server Engine for Client's Connections */rn tServiceHandler h = -1;rn InitializeNetService(IP_ADDR,PORT); //accept lestenrn while(1)rn rn h = ServiceStart(); //acceptrn HandleRequests(h);rn ServiceStop(h);rn rn ShutdownNetService();rn return 0;rnrnrnrnint HandleRequests(tServiceHandler h)rnrn char Buf[MAX_BUF_LEN] = "\0";rn int BufSize = MAX_BUF_LEN;rn TransCmd tc;rn /* Handle Requests of One Client */rn while(1)rn rn BufSize = MAX_BUF_LEN; rn if(RecvData(h, Buf, &BufSize) == 0)rn rn fprintf(stderr,"Connection Error,%s:%d\n",__FILE__,__LINE__);rn return -1;rn rn if(BufSize == 0) //read nothing then continue readrn rn continue;rn rn mencpy(&tc, Buf, BufSize);rn if(!strcmp(tc.cmd, "open"))rn rn printf("open command\n");rn printf("需要把结果返回给client端\n");rn rn elsern rn printf("不对，执行流错误!\n");rn rn return 0;rn rnrn2、socketswrapper.c文件如下：rnrn#include"socketwrapper.h"rn#includern#includern#include /* internet socket */rn#includernrnint sockfd = -1;rnrn/* private macro */rn#define PrepareSocket(addr,port) \rn struct sockaddr_in serveraddr; \rn struct sockaddr_in clientaddr; \rn socklen_t addr_len = sizeof(struct sockaddr); \rn serveraddr.sin_family = AF_INET; \rn serveraddr.sin_port = htons(port); \rn serveraddr.sin_addr.s_addr = inet_addr(addr); \rn memset(&serveraddr.sin_zero, 0, 8); \rn sockfd = socket(PF_INET,SOCK_STREAM,0); \rn if(sockfd == -1) \rn \rn fprintf(stderr,"Socket Error,%s:%d\n", \rn __FILE__,__LINE__); \rn close(sockfd); \rn return -1; \rn rn#define InitServer() \rn int ret = bind( sockfd, \rn (struct sockaddr *)&serveraddr, \rn sizeof(struct sockaddr)); \rn if(ret == -1) \rn \rn fprintf(stderr,"Bind Error,%s:%d\n", \rn __FILE__,__LINE__); \rn close(sockfd); \rn exit(-1); \rn \rn listen(sockfd,MAX_CONNECT_QUEUE);rnrn#define InitClient() \rn int ret = connect(sockfd, \rn (struct sockaddr *)&serveraddr, \rn sizeof(struct sockaddr)); \rn if(ret == -1) \rn \rn fprintf(stderr,"Connect Error,%s:%d\n", \rn __FILE__,__LINE__); \rn exit(-1); \rn rnrn/*rn * InitServerrn * input : addr - server ip addressrn * input : port - server port to openrn * output : Nonern * in/out : Nonern * return : if SUCCESS return 0rn * : if FAILURE return (-1)rn */rnint InitializeNetService(char * addr,short int port)rnrn PrepareSocket(addr,port);rn InitServer();rn return 0;rnrnint ShutdownNetService()rnrn if(sockfd == -1)rn rn return -1;rn rn close(sockfd);rn return 0;rnrn/*rn * OpenRemoteService - Only used in Client side,it connects Server.rn * input : addr - server ip addressrn * input : port - server port to openrn * output : Nonern * in/out : Nonern * return : if SUCCESS return tServiceHandlerrn * : if FAILURE return (-1)rn */rntServiceHandler OpenRemoteService(char * addr,short int port)rnrn PrepareSocket(addr,port);rn InitClient();rn return (tServiceHandler)sockfd;rnrn/*rn * CloseRemoteService - Only used in Client side,it terminate connection.rn * input : h - it MUST BE what OpenRemoteService returns.rn * output : Nonern * in/out : Nonern * return : if SUCCESS return 0rn * : if FAILURE return (-1)rn */rnint CloseRemoteService(tServiceHandler h)rnrn if(h < 0 || ret != BufSize)rn rn fprintf(stderr,"Send Error,%s:%d\n",__FILE__,__LINE__);rn return -1;rn rn return ret;rnrn/*rn * SendData - send data to peer sidern * input : h - it MUST BE what ServiceStart or OpenRemoteService returns.rn * in/out : pBuf - point to memory that will store recved datarn * in/out : pBufSize - the max length of data to recvrn * return : if SUCCESS return BufSize recvedrn * : if FAILURE return (-1)rn * : if Connection Terminals return 0rn */rnint RecvData(tServiceHandler h,char * pBuf,int *pBufSize)rnrn int ret = recv(h,pBuf,*pBufSize,0);rn if(ret < 0)rn rn fprintf(stderr,"Recv Error,%s:%d\n",__FILE__,__LINE__);rn *pBufSize = 0;rn return -1;rn rn *pBufSize = ret;rn return ret;rnrnrn编译命令如下：rngcc -o dbserver dbserver.o socketwrapper.ornrngcc提示错误：rndbserver.o: In function `HandleRequests':rndbserver.c:(.text+0x115): undefined reference to `mencpy'rncollect2: ld 返回 1rnrndbserver.o socketwrapper.o这两个文件已经编译出来了，rn为什么-o 链接成dbserver就提示undefined reference to `mencpy'错误呢？？rnrn请教各位大侠！！rn

undefined reference to `WinMain@16'错误: #include rn#include rnrnfloat add_em(long int a, float b)rnrn float result;rn result=a+b;rn return(result);rnrnrnvoid mian(void)rnrn long int i;rn float result =0;rn time_t start_time, stop_time;rn printf("working... \n");rn time(&start_time);rn for (i=1;igcc functovr.c -g -o functovrrnC:/MinGW/bin/../lib/gcc-lib/mingw32/3.2.3/../../../libmingw32.a(main.o)(.text+0xrn97):main.c: undefined reference to `WinMain@16'

undefined reference to `__gnu_mcount_nc': 内核编译出现 undefined reference to `__gnu_mcount_nc'问题的补丁包

undefined reference 'FunctionName': 所要FunctionName已经被include 到,应该是link时出现的问题.rn请问怎么解决?

求助:undefined reference to vtable: 连接时出错,报对vtable未定义的引用,位置是在Watchdog::Watchdog中.向大家求助,下面是代码:rnrn[CODE=C/C++]rn//file:GeneralWatchdog.hrn#ifndef INCLUDE_GENERALWATCHDOGrn#define INCLUDE_GENERALWATCHDOGrnclass GeneralWatchdogrnrnpublic:rn GeneralWatchdog()rn virtual ~GeneralWatchdog()rnpublic:rn virtual void Append(int number)=0; rn virtual bool IsExist(int number) const=0;rn virtual bool SelfCheck() const=0;rn virtual void Watch(int number)=0; rn virtual int UnvisitedPosFinder() const=0;rn;rn#endifrn[/CODE]rnrn[CODE=C/C++]rn//file:Watchdog.hrn#ifndef INCLUDE_WATCHDOGrn#define INCLUDE_WATCHDOGrnrn#include rn#include "GeneralWatchdog.h"rnrnclass Watchdog:public GeneralWatchdogrnrnpublic:rn Watchdog()//老在这里报错,编译也没问题,就是连接时候不行rn virtual ~Watchdog()rnpublic:rn virtual void Append(int number); rn virtual bool IsExist(int number) const;rn virtual bool SelfCheck() const;rn virtual void Watch(int number); rn virtual int UnvisitedPosFinder() const;//return -1 if not findrnprivate:rn std::map guard;rn;rnrn#endif //INCLUDE_WATCHDOGrn[/CODE]rnrn[CODE=C/C++]rn//file:main.ccrn#include "Watchdog.h"rn#include rnrnvoid TestWatchdog1()rnrn GeneralWatchdog *w=new Watchdog();rn w->Append(2);rn w->Append(5);rn for(int i=0;iWatch(i);rn rn assert(w->UnvisitedPosFinder()==5);rn delete w; rnrnrnint main()rnrn TestWatchdog1();rn return 0;rnrn[/CODE]rnrn下面是makefile文件rnTest:main.o Watchdog.o rn g++ main.o -o Watchdog.o -o TestrnrnWatchdog.o:Watchdog.cc Watchdog.h GeneralWatchdog.h rn g++ -c Watchdog.cc -o Watchdog.orn

undefined reference 提示？: 所有文件都include还会提示以下错误，这是为什么？rnvc6.0的环境下：rnundefined reference to functionname

undefined reference错误: [code=C/C++]#include rnrnusing namespace std;rnrnclass Arnrnpublic :rn static int i;rnrn static void get();rn;rnvoid A::get()rnrn i=1;rn cout<

烦人的undefined reference to...: 以下三个文件：zwlist.c为函数定义文件；zwlist.h是相应的头文件；temp.c是主程序文件。其中我将头文件放了stdio.h所在的目录之下。rn 执行以下操作：rn gcc -c zwlist.crn ar cqs libt.a zwlist.orn gcc temp.c -static -L. -ltrnrn出现以下提示,不明原因rn temp.o:temp.c:: undefined reference to `_initstack`rn temp.o:temp.c:: undefined reference to `_push`rn temp.o:temp.c:: undefined reference to `_pop`rn temp.o:temp.c:: undefined reference to `_pop`rn temp.o:temp.c:: undefined reference to `_pop`rn temp.o:temp.c:: undefined reference to `_pop`rn clooect2: ld returned 1 exit statusrnrnrnrn/* ＝＝＝＝＝zwlist.h＝＝＝＝＝ */rnrntypedef int ElementType;rn#ifndef ZW_STACK_ARRAYrn#define ZW_STACK_ARRAYrn#define Min_liary (6)rnstruct arraystackrnrn ElementType min; rn ElementType top; rn ElementType *array;rn;rntypedef struct arraystack *stack_zw;rnrnstack_zw initstack(int); rnint push(stack_zw,ElementType);rnElementType pop(stack_zw); //rnElementType top(stack_zw); //rn#endifrnrn/* ＝＝＝＝ zwlist.c ＝＝＝＝ */rnrn#include "zwlist.h" rn#include "stdio.h"rn#include "stdlib.h"rnrn /*用数组实现栈*/rn#ifndef ZW_STACK_ARRAYrn#define ZW_STACK_ARRAYrnstack_zw initstack(int n)//创建头结点及数组rnrn stack_zw s;rn n=nmin=n;rn s->top=-1;rn s->array=(ElementType *)malloc(n*sizeof(ElementType));rn return s;rnrnint push(stack_zw k,ElementType x)//入栈rnrn if(k->top==k->min-1)rn rn printf("数组已满\n");rn return 0;rn rn k->array[++k->top]=x;rn return 1;rnrnElementType pop(stack_zw m)//出栈rnrn if(m->top==-1)rn rn printf("数组已空\n");rn return 0;rn rn return m->array[m->top--];rnrn#endif //ZW_STACK_ARRAYrnrn/* ＝＝＝＝＝ temp.c ＝＝＝＝＝ */rnrn#includern#include rn#includern#include "zwlist.h"rnrnint main(void)rnrn int card[52]; rn int pos; rn int i,temp;rn long temptime;rn stack_zw s;rn s=initstack(100);rn srand(time(&temptime)%60); rn for(i=0;i);rn rn

4900交换机的配置下载: 这个关于华为4900交换机的配置，如果大家需要的话可以看一下的！相关下载链接：[url=//download.csdn.net/download/haiyun_09/2161449?utm_source=bbsseo]//download.csdn.net/download/haiyun_09/2161449?utm_source=bbsseo[/url]

CP330设计手册下载: CP3300是安川的系统PLC，网上资源极少，作为一款在安川原装系统中使用的PLC，希望此文档在设备维护和改动中对你有帮助相关下载链接：[url=//download.csdn.net/download/lijinshuan/4669949?utm_source=bbsseo]//download.csdn.net/download/lijinshuan/4669949?utm_source=bbsseo[/url]

电脑模拟钢琴下载: 使用方法超级简单，按任意键都可以发音 2.0版支持查看最新的流行琴谱以及在线分享你的大作，你不但可以把你弹好的曲子发给朋友听，也可以在线比拼，看看谁弹的最好，受到最多人欢迎哦相关下载链接：[url=//download.csdn.net/download/u012089496/6251251?utm_source=bbsseo]//download.csdn.net/download/u012089496/6251251?utm_source=bbsseo[/url]

相关热词 c#检测非法字符 c#双屏截图 c#中怎么关闭线程 c# 显示服务器上的图片 api嵌入窗口 c# c# 控制网页 c# encrypt c#微信网页版登录 c# login 居中 c# 考试软件

我们是很有底线的