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我正在构建一个名为 physgameengine 的库来帮助构建游戏。这个游戏库链接了几个库，包括：Ogre3d、Bullet Physics 和 SDL，它们位于库文件 libOgreMain-1.6.5.so、libBulletCollision.a、libBulletDynamics.a、libBulletSoftBody.a、libSDL-1.2.so.0 中. 这个库/共享对象似乎在 Ubuntu 9.10 中使用 GCC 和 Code::blocks 构建得很好。它确实在带有 mingw 和 Code::blocks 的 Windows 上构建得很好。

在 Windows 中，我可以使用我构建的库制作可以编译/链接的游戏，这些程序运行并完全按照我的预期运行。在 Ubuntu 中，当我尝试编译/链接使用这个库的游戏时，我得到了很多未定义的引用错误。但是对我构建的库中的函数或对象没有影响，而是对我的库调用的项目。这是我得到的错误的一个例子。

> ||warning: libOgreMain-1.6.5.so, needed by ../physgameengine/bin/ubuntudebug/libphysgame.so, not found (try using -rpath or -rpath-link)|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Root::Root(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::StringUtil::BLANK'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionWorld::updateAabbs()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Root::createRenderWindow(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int, unsigned int, bool, std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const*)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Timer::getMilliseconds()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Root::createSceneManager(unsigned short, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Root::~Root()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionWorld::~btCollisionWorld()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Root::renderOneFrame()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionObject::btCollisionObject()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Timer::getMillisecondsCPU()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btSimulationIslandManager::buildAndProcessIslands(btDispatcher*, btCollisionWorld*, btSimulationIslandManager::IslandCallback*)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Viewport::getActualWidth() const'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Root::initialise(bool, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Camera::lookAt(Ogre::Vector3 const&)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionWorld::removeCollisionObject(btCollisionObject*)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Viewport::getActualHeight() const'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Timer::reset()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Root::restoreConfig()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Timer::~Timer()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::NedAllocImpl::deallocBytes(void*)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionWorld::convexSweepTest(btConvexShape const*, btTransform const&, btTransform const&, btCollisionWorld::ConvexResultCallback&, float) const'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::NedAllocImpl::allocBytes(unsigned int, char const*, int, char const*)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `typeinfo for btCollisionWorld'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionObject::~btCollisionObject()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btSimulationIslandManager::btSimulationIslandManager()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Root::showConfigDialog()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionObject::setActivationState(int)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::LogManager::getSingleton()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionWorld::performDiscreteCollisionDetection()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::LogManager::logMessage(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Ogre::LogMessageLevel, bool)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Timer::Timer()'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionWorld::btCollisionWorld(btDispatcher*, btBroadphaseInterface*, btCollisionConfiguration*)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `typeinfo for btCollisionObject'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `Ogre::Camera::setPosition(Ogre::Vector3 const&)'|
../physgameengine/bin/ubuntudebug/libphysgame.so||undefined reference to `btCollisionWorld::addCollisionObject(btCollisionObject*, short, short)'|
||=== Build finished: 36 errors, 1 warnings ===|

Windows 和 Linux 之间的大部分代码是相同的，它们似乎具有等效的编译/链接器设置。但是 Linux 游戏似乎链接到我的库应该链接的原始库。到底是怎么回事？关于如何解决它的任何想法？

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4 回答 4

3

错误的第一行告诉您问题：

libOgreMain-1.6.5.so, needed by libphysgame.so, not found (try using -rpath or -rpath-link)|

您需要指定安装 libOgreMain 的目录。由于需要使用链接器选项，因此需要使用 gcc 的 -Wl 功能。假设文件在 /opt/lib 中，您将添加：

gcc -Wl,-rpath-link,/opt/lib ...rest of linker line...
于 2010-01-15T06:00:46.130 回答
3

与 Windows 不同，在 Linux 系统中，将共享库文件与可执行文件放在同一文件夹中是不够的。

您应该提供一个LD_LIBRARY_PATH变量或遵循链接器的建议并使用-rpath（检查这个问题）

于 2010-01-15T06:10:49.403 回答
2

仅基于第一行：

> ||warning: libOgreMain-1.6.5.so, needed by ../physgameengine/bin/ubuntudebug/libphysgame.so, not found (try using -rpath or -rpath-link)|

您的链接器似乎无法找到您的共享对象。检查以确保正确设置链接器的包含路径。

于 2010-01-15T05:51:15.197 回答
1

这是关于主题http://sysprogs.com/w/fixing-rpath-link-issues-with-cross-compilers/的一个很好的链接

本质上，如果您链​​接到的所有库都没有 -lmylib，则不能指望 -Lpath 找到它们。因此，如果 /opt/infoa/lib/liba.so 依赖于 /opt/infod/lib/libd.so 并且您只指定 -la，那么您需要这样的内容：

gcc -Wl,-rpath-link,/opt/infod/lib -L/opt/infoa/lib -la *.c -o myexec

于 2015-03-24T21:52:02.053 回答