您的位置: 首页  >  技术问答  >  g ++未定义的编译错误

g ++未定义的编译错误

分类: 技术问答 • 2022-09-20 18:21:51
问题描述：

我试图在linux上编译我的程序。它在Windows上很好（在Visual Studio 2015下编译）。但是，当我尝试做在Linux上一样，我得到这个错误：g ++未定义的编译错误

g++ -std=c++0x -std=c++0x Prueba1.cpp -o Prueba1 
/tmp/cc9HTgYi.o: In function `Escuchador::onFrame(Leap::Controller const&)': 
Prueba1.cpp:(.text+0x51): undefined reference to `Leap::Controller::frame(int) const' 
Prueba1.cpp:(.text+0x6c): undefined reference to `Leap::Frame::fingers() const' 
Prueba1.cpp:(.text+0x7d): undefined reference to `Leap::FingerList::count() const' 
Prueba1.cpp:(.text+0x97): undefined reference to `Leap::Frame::hands() const' 
Prueba1.cpp:(.text+0xa8): undefined reference to `Leap::HandList::count() const' 
Prueba1.cpp:(.text+0xbc): undefined reference to `Leap::Frame::timestamp() const' 
Prueba1.cpp:(.text+0xce): undefined reference to `Leap::Frame::id() const' 
Prueba1.cpp:(.text+0x1ac): undefined reference to `Leap::Frame::hands() const' 
Prueba1.cpp:(.text+0x1c7): undefined reference to `Leap::HandList::begin() const' 
Prueba1.cpp:(.text+0x203): undefined reference to `Leap::Hand::isLeft() const' 
Prueba1.cpp:(.text+0x245): undefined reference to `Leap::Hand::id() const' 
Prueba1.cpp:(.text+0x2fc): undefined reference to `Leap::Hand::palmNormal() const' 
Prueba1.cpp:(.text+0x317): undefined reference to `Leap::Hand::direction() const' 
Prueba1.cpp:(.text+0x332): undefined reference to `Leap::Hand::fingers() const' 
Prueba1.cpp:(.text+0x34d): undefined reference to `Leap::FingerList::begin() const' 
Prueba1.cpp:(.text+0x37e): undefined reference to `Leap::Pointable::id() const' 
Prueba1.cpp:(.text+0x38e): undefined reference to `Leap::Finger::type() const' 
Prueba1.cpp:(.text+0x47b): undefined reference to `Leap::Finger::bone(Leap::Bone::Type) const' 
Prueba1.cpp:(.text+0x510): undefined reference to `Leap::Frame::hands() const' 
Prueba1.cpp:(.text+0x533): undefined reference to `Leap::HandList::operator[](int) const' 
Prueba1.cpp:(.text+0x54e): undefined reference to `Leap::Hand::fingers() const' 
Prueba1.cpp:(.text+0x582): undefined reference to `Leap::FingerList::begin() const' 
Prueba1.cpp:(.text+0x595): undefined reference to `Leap::Bone::Bone()' 
Prueba1.cpp:(.text+0x5ea): undefined reference to `Leap::Finger::bone(Leap::Bone::Type) const' 
Prueba1.cpp:(.text+0x63e): undefined reference to `Leap::Finger::type() const' 
Prueba1.cpp:(.text+0x67f): undefined reference to `Leap::operator<<(std::ostream&, Leap::Bone const&)' 
Prueba1.cpp:(.text+0x6ee): undefined reference to `Leap::FingerList::end() const' 
Prueba1.cpp:(.text+0x726): undefined reference to `Leap::Hand::fingers() const' 
Prueba1.cpp:(.text+0x74d): undefined reference to `Leap::FingerList::begin() const' 
Prueba1.cpp:(.text+0x768): undefined reference to `Leap::FingerList::end() const' 
Prueba1.cpp:(.text+0x7ab): undefined reference to `Leap::Finger::bone(Leap::Bone::Type) const' 
Prueba1.cpp:(.text+0x7ce): undefined reference to `Leap::Finger::bone(Leap::Bone::Type) const' 
Prueba1.cpp:(.text+0x7f1): undefined reference to `Leap::Finger::bone(Leap::Bone::Type) const' 
Prueba1.cpp:(.text+0x814): undefined reference to `Leap::Finger::bone(Leap::Bone::Type) const' 
Prueba1.cpp:(.text+0x825): undefined reference to `Leap::Finger::type() const' 
Prueba1.cpp:(.text+0x848): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0x863): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0x89e): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0x8b9): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0x8f4): undefined reference to `Leap::Bone::direction() const' 
/tmp/cc9HTgYi.o:Prueba1.cpp:(.text+0x90c): more undefined references to `Leap::Bone::direction() const' follow 
/tmp/cc9HTgYi.o: In function `Escuchador::onFrame(Leap::Controller const&)': 
Prueba1.cpp:(.text+0xa15): undefined reference to `Leap::Finger::type() const' 
Prueba1.cpp:(.text+0xa37): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0xa4f): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0xa87): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0xa9f): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0xad7): undefined reference to `Leap::Bone::direction() const' 
/tmp/cc9HTgYi.o:Prueba1.cpp:(.text+0xaef): more undefined references to `Leap::Bone::direction() const' follow 
/tmp/cc9HTgYi.o: In function `Escuchador::onFrame(Leap::Controller const&)': 
Prueba1.cpp:(.text+0xbf8): undefined reference to `Leap::Finger::type() const' 
Prueba1.cpp:(.text+0xc1b): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0xc33): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0xc6b): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0xc83): undefined reference to `Leap::Bone::direction() const' 
Prueba1.cpp:(.text+0xcbb): undefined reference to `Leap::Bone::direction() const' 
/tmp/cc9HTgYi.o:Prueba1.cpp:(.text+0xcd3): more undefined references to `Leap::Bone::direction() const' follow 
/tmp/cc9HTgYi.o: In function `Escuchador::onFrame(Leap::Controller const&)': 
Prueba1.cpp:(.text+0xeb4): undefined reference to `Leap::FingerList::end() const' 
Prueba1.cpp:(.text+0xf27): undefined reference to `Leap::HandList::end() const' 
/tmp/cc9HTgYi.o: In function `main': 
Prueba1.cpp:(.text+0x11a3): undefined reference to `Leap::Controller::Controller()' 
Prueba1.cpp:(.text+0x11b7): undefined reference to `Leap::Controller::addListener(Leap::Listener&)' 
Prueba1.cpp:(.text+0x11fb): undefined reference to `Leap::Controller::removeListener(Leap::Listener&)' 
Prueba1.cpp:(.text+0x120c): undefined reference to `Leap::Controller::~Controller()' 
Prueba1.cpp:(.text+0x122a): undefined reference to `Leap::Controller::~Controller()' 
/tmp/cc9HTgYi.o: In function `Leap::Pointable::~Pointable()': 
Prueba1.cpp:(.text._ZN4Leap9PointableD2Ev[_ZN4Leap9PointableD5Ev]+0x16): undefined reference to `Leap::Interface::~Interface()' 
/tmp/cc9HTgYi.o: In function `Leap::Bone::operator=(Leap::Bone&&)': 
Prueba1.cpp:(.text._ZN4Leap4BoneaSEOS0_[_ZN4Leap4BoneaSEOS0_]+0x14): undefined reference to `Leap::Interface::operator=(Leap::Interface const&)' 
/tmp/cc9HTgYi.o: In function `Leap::ConstListIterator<Leap::HandList, Leap::Hand>::operator*() const': 
Prueba1.cpp:(.text._ZNK4Leap17ConstListIteratorINS_8HandListENS_4HandEEdeEv[_ZNK4Leap17ConstListIteratorINS_8HandListENS_4HandEEdeEv]+0x20): undefined reference to `Leap::HandList::operator[](int) const' 
/tmp/cc9HTgYi.o: In function `Leap::ConstListIterator<Leap::FingerList, Leap::Finger>::operator*() const': 
Prueba1.cpp:(.text._ZNK4Leap17ConstListIteratorINS_10FingerListENS_6FingerEEdeEv[_ZNK4Leap17ConstListIteratorINS_10FingerListENS_6FingerEEdeEv]+0x20): undefined reference to `Leap::FingerList::operator[](int) const' 
/tmp/cc9HTgYi.o: In function `Leap::Frame::~Frame()': 
Prueba1.cpp:(.text._ZN4Leap5FrameD2Ev[_ZN4Leap5FrameD5Ev]+0x16): undefined reference to `Leap::Interface::~Interface()' 
/tmp/cc9HTgYi.o: In function `Leap::HandList::~HandList()': 
Prueba1.cpp:(.text._ZN4Leap8HandListD2Ev[_ZN4Leap8HandListD5Ev]+0x16): undefined reference to `Leap::Interface::~Interface()' 
/tmp/cc9HTgYi.o: In function `Leap::FingerList::~FingerList()': 
Prueba1.cpp:(.text._ZN4Leap10FingerListD2Ev[_ZN4Leap10FingerListD5Ev]+0x16): undefined reference to `Leap::Interface::~Interface()' 
/tmp/cc9HTgYi.o: In function `Leap::Hand::~Hand()': 
Prueba1.cpp:(.text._ZN4Leap4HandD2Ev[_ZN4Leap4HandD5Ev]+0x16): undefined reference to `Leap::Interface::~Interface()' 
/tmp/cc9HTgYi.o: In function `Leap::Bone::~Bone()': 
Prueba1.cpp:(.text._ZN4Leap4BoneD2Ev[_ZN4Leap4BoneD5Ev]+0x16): undefined reference to `Leap::Interface::~Interface()' 
/tmp/cc9HTgYi.o:(.rodata._ZTIN4Leap5FrameE[_ZTIN4Leap5FrameE]+0x8): undefined reference to `typeinfo for Leap::Interface' 
/tmp/cc9HTgYi.o:(.rodata._ZTIN4Leap8HandListE[_ZTIN4Leap8HandListE]+0x8): undefined reference to `typeinfo for Leap::Interface' 
/tmp/cc9HTgYi.o:(.rodata._ZTIN4Leap10FingerListE[_ZTIN4Leap10FingerListE]+0x8): undefined reference to `typeinfo for Leap::Interface' 
/tmp/cc9HTgYi.o:(.rodata._ZTIN4Leap4HandE[_ZTIN4Leap4HandE]+0x8): undefined reference to `typeinfo for Leap::Interface' 
/tmp/cc9HTgYi.o:(.rodata._ZTIN4Leap4BoneE[_ZTIN4Leap4BoneE]+0x8): undefined reference to `typeinfo for Leap::Interface' 
/tmp/cc9HTgYi.o:(.rodata._ZTIN4Leap9PointableE[_ZTIN4Leap9PointableE]+0x8): more undefined references to `typeinfo for Leap::Interface' follow 
collect2: error: ld returned 1 exit status 
make: *** [Prueba1] Error 1

我的#include是：

#include <iostream> 
#include <cstring> 
#include "Leap.h"

如此看来问题是与Leap.h头。在SDK中有一个Sample.cpp，我可以编译并运行很好。我使用相同的生成文件和相同的文件系统;我使用的是与Sample.cpp相同的#include，因此我将.cpp文件移动到Sample.cpp所在的文件夹中，并尝试编译，并且出现错误。我不知道如何解决它，有什么想法？下面是生成文件：

OS := $(shell uname) 
ARCH := $(shell uname -m) 
CXXFLAGS := -std=c++0x -std=c++0x 

ifeq ($(OS), Linux) 
    ifeq ($(ARCH), x86_64) 
LEAP_LIBRARY := ../lib/x64/libLeap.so -Wl,-rpath,../lib/x64 
    else 
LEAP_LIBRARY := ../lib/x86/libLeap.so -Wl,-rpath,../lib/x86 
    endif 
else 
    # OS X 
LEAP_LIBRARY := ../lib/libLeap.dylib 
endif 

Sample: Sample.cpp 
$(CXX) -Wall -g -I../include Sample.cpp -o Sample $(LEAP_LIBRARY) 

ifeq ($(OS), Darwin) 
install_name_tool -change @loader_path/libLeap.dylib ../lib/libLeap.dylib Sample 
endif 

clean: 
rm -rf Sample Sample.dSYM

我只加了CXXFLAGS解决C + 98编译错误。我也可以这样编译Sample.cpp，但是当我尝试在我的文件上执行相同的操作时，出现错误。谢谢您的帮助！

+1

我有这样的感觉，使得不能正确识别操作系统。尝试：UNAME_S：= $（shell uname -s） ifeq（$（UNAME_S），Linux） ---你在这里填写--- endif ....查看更多：http://stackoverflow.com/ questions/714100/os-detecting-makefile – fritzone

+1

@fritzone它看起来像OP没有使用makefile。 –

+3

libLeap.so在编译行中不存在。这意味着您要么不使用makefile，要么不使用makefile而不更新它。正如所写，它只能用于名为Sample的程序。您必须修改makefile以使用您的程序名称或（高级任务）来改进它，以便它可以与任何程序名称一起使用，并使用标准宏如LDLIBS。 –

答

So it seems the problem is with the Leap.h header.

不，没有问题的标题。你只是没有链接到提供这些函数定义的库。

看看makefile文件如何构建示例程序：它链接到libleap.so，

你需要做的是相同的：

g++ -std=c++0x -std=c++0x Prueba1.cpp -o Prueba1 ../lib/x64/libleap.so -Wl,-rpath,../lib/x64

（更换64与86，如果你使用的是32位位系统）。

答

首先，需要阅读：What is an undefined reference/unresolved external symbol error and how do I fix it?请至少阅读与外部库组件相关的答案，然后返回到此问题。

好吧，在你的情况下，你正在运行一个链接命令，而不指定外部库。怎么来的？为什么你能够编译包装附带的样品？

看看makefile。它说

Sample: Sample.cpp 
    $(CXX) -Wall -g -I../include Sample.cpp -o Sample $(LEAP_LIBRARY)

这规则告诉make三件事：什么建（冒号前的第一行），如何从构建它（冒号后），并如何到建立它（第二行）。所以，当你运行如下命令

make Sample

make有一个不错的主意做什么。

现在如果你说

make Prueba1

事情有点不同。在makefile中没有关于Prueba1的特殊规则，所以make获取它的（巨大的）一组内置规则并寻找一个可以让它为你构建Prueba1的规则。确实有这样的内置规则，但它不知道libLeap.so。这就是为什么你在构建日志中没有看到它。

当然，你可以添加这样的事情给你的Makefile：

Prueba1: Prueba1.cpp 
    $(CXX) -Wall -g -I../include Prueba1.cpp -o Prueba1 $(LEAP_LIBRARY)

但我冒昧地猜测，当你得到它Prueba99将增长有些老了。我们可以做得更好吗？

是的，我们可以，但我们先回答另一个问题。编辑命令怎么知道-std=c++0x？

这是因为您将此标志添加到内置宏CXXFLAGS，并且内置规则使用此宏。顺便说一句，你不需要指定-std=c++0x两次。

有没有办法像编译器标志一样对待库？绝对！有两个内置宏LDLIBS和LDFLAGS。如果你定义它们是这样的：

LDLIBS := ../lib/x64/libLeap.so 
LDFLAGS := -Wl,-rpath,../lib/x64

或（或者）

LDLIBS := -lLeap 
LDFLAGS := -L ../lib/x64 -Wl,-rpath,../lib/x64

你的makefile应该能够建立针对libLeap任何C++程序（如果它写成一个C++源文件）。

自从Sample规则使用它以后，将-I../include添加到CPPFLAGS可能是明智的做法。你的编辑似乎没有它，但它可能会失败，如果你改变你的工作目录。

相关推荐