GCC報告未定義的引用與現有符號

Question

這是我的鏈接命令行：

g++ -o verdox src/AIFactory.o src/AnimatedMesh.o src/BalanceStone.o src/Camera.o \ 
src/Card.o src/Caterpillar.o src/Character.o src/Collectable.o src/Concave.o \ 
src/Configuration.o src/Dynamic.o src/DynBall.o src/Enemy.o src/FixedLight.o \ 
src/FuzzyState.o src/Game.o src/GameInput.o src/GameUnit.o src/HUD.o src/Level.o \ 
src/LogicAttributes.o src/MainCharacter.o src/Main.o src/Menu.o src/MenuInput.o \ 
src/MeshStrider.o src/Object.o src/ObjectFactory.o src/OgreDebugDrawer.o \ 
src/OgreMusic.o src/OgreSoundEffect.o src/Projectile.o src/Scenery.o src/Shape.o \ 
src/SoftBody.o src/Trigger.o src/Utils.o src/Verdox.o src/Wasp.o src/World.o \ 
UFUG/libufug.a TinyXML/libtinyxml.a -L[...](lots of library dirs) \ 
-lboost_thread-mt -logg -lvorbis -lvorbisfile -lConvexDecomposition \ 
-lBulletSoftBody -lBulletDynamics -lBulletCollision -lLinearMath \ 
-lOgreMain -lpthread /usr/local/lib/OGRE/Plugin_OctreeZone.so \ 
/usr/local/lib/OGRE/Plugin_PCZSceneManager.so -Wl,-rpath,/usr/local/lib/OGRE \ 
-L/usr/local/lib -lOgreMain -lpthread -L/usr/local/lib -lCEGUIBase \ 
-L/usr/local/lib -lCEGUIOgreRenderer -lOgreMain -lpthread -lCEGUIBase -lsigc-2.0 \ 
-lopenal -lOIS 

我知道有一些重複，但我認爲它應該做任何傷害，而且我也不想打在知道什麼是錯誤之前建立系統。

的問題是，我得到一些未定義的引用：

src/Game.o: In function `Game': 
/home/lucas/src/ufugames/verdox/src/Game.cpp:64: undefined reference to `Ogre::PCZPlugin::PCZPlugin()' 
/home/lucas/src/ufugames/verdox/src/Game.cpp:64: undefined reference to `Ogre::OctreeZonePlugin::OctreeZonePlugin()' 
src/Game.o: In function `~PCZPlugin': 
/home/lucas/src/ufugames/ogre_src_v1-8-0/PlugIns/PCZSceneManager/include/OgrePCZPlugin.h:49: undefined reference to `vtable for Ogre::PCZPlugin' 
src/Game.o: In function `~OctreeZonePlugin': 
/home/lucas/src/ufugames/ogre_src_v1-8-0/PlugIns/OctreeZone/include/OgreOctreeZonePlugin.h:47: undefined reference to `vtable for Ogre::OctreeZonePlugin' 
collect2: ld returned 1 exit status 

但所有報告失蹤內Plugin_OctreeZone.so和Plugin_PCZSceneManager.so找到的符號：

$ nm -C /usr/local/lib/OGRE/Plugin_PCZSceneManager.so | grep "Ogre::PCZPlugin::PCZPlugin()" 
00029440 t Ogre::PCZPlugin::PCZPlugin() 
00029440 t Ogre::PCZPlugin::PCZPlugin() 

$ nm -C /usr/local/lib/OGRE/Plugin_PCZSceneManager.so | grep "vtable for Ogre::PCZPlugin" 
00046e20 d vtable for Ogre::PCZPlugin 

$ nm -C /usr/local/lib/OGRE/Plugin_OctreeZone.so | grep "Ogre::OctreeZonePlugin::OctreeZonePlugin()" 
0000c350 t Ogre::OctreeZonePlugin::OctreeZonePlugin() 
0000c350 t Ogre::OctreeZonePlugin::OctreeZonePlugin() 

$ nm -C /usr/local/lib/OGRE/Plugin_OctreeZone.so | grep "vtable for Ogre::OctreeZonePlugin" 
0000fe20 d vtable for Ogre::OctreeZonePlugin 

那麼，爲什麼連接失敗？我使用GNU ld 2.21.53.20110810和GCC 4.6.1（從Ubuntu 11.10開始）。

Answer 1

在你的鏈接器命令庫事項順序：http://www.network-theory.co.uk/docs/gccintro/gccintro_18.html

的第一件事要做的就是把-o verdox在命令結束。我之前遇到過這個問題......然後看看是否還有任何錯誤。