我正在使用SConstruct构建一个C ++库。如果我将库构建为静态库,一切都按预期工作。
但是,如果我尝试将库构建为共享库,我会在链接时获得一个巨大的“多重定义”错误列表。
我不明白为什么会抛出这些错误 - 据我所知,我没有多次定义这些方法。看起来这些方法似乎是virtual
,这可能是也可能不是因素。
相关文件:
ISceneManager.hpp
BasicSceneManager.hpp(继承自ISceneManager
)
BasicSceneManager.cpp
错误摘录:
build/BasicSceneManager.os: In function `glr::BasicSceneManager::drawAll()':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:81: multiple definition of `glr::BasicSceneManager::drawAll()'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:81: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::setDefaultShaderProgram(glr::shaders::IShaderProgram*)':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:118: multiple definition of `glr::BasicSceneManager::setDefaultShaderProgram(glr::shaders::IShaderProgram*)'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:118: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getModelMatrix() const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:128: multiple definition of `glr::BasicSceneManager::getModelMatrix() const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:128: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getShaderProgramManager() const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:133: multiple definition of `glr::BasicSceneManager::getShaderProgramManager() const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:133: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getCamera() const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:162: multiple definition of `glr::BasicSceneManager::getCamera() const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:162: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::destroyCamera()':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:236: multiple definition of `glr::BasicSceneManager::destroyCamera()'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:236: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getBillboardManager() const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:276: multiple definition of `glr::BasicSceneManager::getBillboardManager() const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:276: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getModelManager() const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:281: multiple definition of `glr::BasicSceneManager::getModelManager() const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:281: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getNumSceneNodes() const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:311: multiple definition of `glr::BasicSceneManager::getNumSceneNodes() const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:311: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getNumLights() const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:316: multiple definition of `glr::BasicSceneManager::getNumLights() const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:316: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getEnvironmentManager()':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:299: multiple definition of `glr::BasicSceneManager::getEnvironmentManager()'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:299: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getTerrainManager(glr::terrain::IFieldFunction*)':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:287: multiple definition of `glr::BasicSceneManager::getTerrainManager(glr::terrain::IFieldFunction*)'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:287: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getSceneNode(glr::Id) const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:138: multiple definition of `glr::BasicSceneManager::getSceneNode(glr::Id) const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:138: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getLight(glr::Id) const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:167: multiple definition of `glr::BasicSceneManager::getLight(glr::Id) const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:167: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getSceneNode(std::string const&) const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:150: multiple definition of `glr::BasicSceneManager::getSceneNode(std::string const&) const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:150: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getLight(std::string const&) const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:179: multiple definition of `glr::BasicSceneManager::getLight(std::string const&) const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:179: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::getDefaultShaderProgram() const':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:123: multiple definition of `glr::BasicSceneManager::getDefaultShaderProgram() const'
build/BasicSceneManager.os:/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:123: first defined here
build/BasicSceneManager.os: In function `glr::BasicSceneManager::destroySceneNode(glr::ISceneNode*)':
/home/jarrett/projects/icebreakers/glr/src/BasicSceneManager.cpp:221: multiple definition of `glr::BasicSceneManager::destroySceneNode(glr::ISceneNode*)'
有谁知道为什么我会收到这些错误?
答案 0 :(得分:1)
事实证明问题出在SConstruct
。
我使用Glob
命令收集我的源文件,如下所示:
source_files = Glob('build/*.cpp')
source_files = source_files + Glob('build/exceptions/*.cpp')
source_files = source_files + Glob('build/gui/*.cpp')
source_files = source_files + Glob('build/gui/cef/*.cpp')
source_files = source_files + Glob('build/models/*.cpp')
source_files = source_files + Glob('build/*.cpp')
source_files = source_files + Glob('build/environment/*.cpp')
source_files = source_files + Glob('build/terrain/*.cpp')
source_files = source_files + Glob('build/terrain/marching_cubes/*.cpp')
source_files = source_files + Glob('build/serialize/*.cpp')
...
env.SharedLibrary('build/glr', source_files, LIBS = libraries, LIBPATH = library_paths)
问题是我有一个重复的source_files = source_files + Glob('build/*.cpp')
行,导致某些源文件在链接器中被包含两次。
删除该重复行,它工作得很好。
这只是SharedLibrary
构建器的一个问题 - 使用StaticLibrary
构建器时没有发生这种情况。此问题已记录在案here。
感谢kec帮助诊断此问题。