理解出错信息

-1

因此，我将SqAtx的GitHub存储库SuperMarioWorld克隆到我的Ubuntu 16.04（64位）机器上。我想运行他的超级马里奥克隆为了了解他的项目，并通过他做这个游戏的方式来学习。理解出错信息

首先，我无法编译它，因为他在README.md中解释它。然而，我已经成功地编译了一个自己的战列舰游戏（这告诉我Cmake，make，SFML和一个C编译器都已正确安装）。作为一个错误，我得到这个错误信息从生成文件夹运行cmake ..后：

CMake Error at CMakeLists.txt:24 (add_executable): 
add_executable called with incorrect number of arguments 


-- Found SFML 2.4.0 in /usr/include 
CMake Error at CMakeLists.txt:32 (target_link_libraries): 
Cannot specify link libraries for target "SuperMarioWorld" which is not 
built by this project. 


-- Configuring incomplete, errors occurred!

然后我修改了他CMakeList.txt，使其成功地创建了一个Makefile文件。我的CMakeList.txt如下所示：

#Change this if you need to target a specific CMake version 
cmake_minimum_required (VERSION 2.6) 

# Enable debug symbols by default 
# must be done before project() statement 
if(NOT CMAKE_BUILD_TYPE) 
    set(CMAKE_BUILD_TYPE Debug CACHE STRING "Choose the type of build (Debug or Release)" FORCE) 
endif() 

project (SuperMarioWorld) 

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++11 -Wall -g") 

# I guess you have not released the project yet :p 
set (SuperMarioWorld_VERSION_MAJOR 0) 
set (SuperMarioWorld_VERSION_MINOR 1) 
set (SuperMarioWorld_VERSION_PATCH 0) 

include_directories("${PROJECT_BINARY_DIR}") 
set(SOURCE_FILES 
    EventEngine/Listeners/CharacterDiedListener.cpp 
    EventEngine/Listeners/CharacterPositionUpdateListener.cpp 
    EventEngine/Listeners/CloseRequestListener.cpp 
    EventEngine/Listeners/DebugInfoUpdatedListener.cpp 
    EventEngine/Listeners/ForegroundItemRemovedListener.cpp 
    EventEngine/Listeners/ForegroundItemUpdatedListener.cpp 
    EventEngine/Listeners/GotLevelInfoListener.cpp 
    EventEngine/Listeners/KeyboardListener.cpp 
    EventEngine/Listeners/LevelStartListener.cpp 
    EventEngine/Listeners/MarioJumpListener.cpp 
    EventEngine/Listeners/MarioKickedEnemyListener.cpp 
    EventEngine/Listeners/NewCharacterReadListener.cpp 
    EventEngine/Listeners/NewForegroundItemReadListener.cpp 
    EventEngine/Listeners/NewPipeReadListener.cpp 
    EventEngine/Listeners/ToggleIgnoreInputListener.cpp 
    EventEngine/EventEngine.cpp 
    Game/CollisionHandler.cpp 
    Game/GameEngine.cpp 
    Game/LevelImporter.cpp 
    Graphics/GraphicsEngine.cpp 
    Graphics/SpriteHandler.cpp 
    Sound/SoundEngine.cpp 
    SuperMario/Game.cpp 
    SuperMario/main.cpp 
    System/Characters/Enemy.cpp 
    System/Characters/Goomba.cpp 
    System/Characters/MovingObject.cpp 
    System/Characters/Player.cpp 
    System/Items/Box.cpp 
    System/Items/Pipe.cpp 
    System/irrXML/irrXML.cpp 
    System/Engine.cpp 
    System/Util.cpp 
) 
# Define sources and executable 
set (EXECUTABLE_NAME "SuperMarioWorld") 
add_executable(${EXECUTABLE_NAME} ${SOURCE_FILES}) 

# Detect and add SFML 
set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/lib" ${CMAKE_MODULE_PATH}) 
#Find any version 2.X of SFML 
#See the FindSFML.cmake file for additional details and instructions 
find_package(SFML 2 REQUIRED system window graphics network audio) 
if(SFML_FOUND) 
    include_directories(${SFML_INCLUDE_DIR}) 
    target_link_libraries(${EXECUTABLE_NAME} ${SFML_LIBRARIES}) 
endif() 

# Install target 
install(TARGETS ${EXECUTABLE_NAME} DESTINATION bin)

有了这个CMakeList.txt，我可以成功创建一个makefile。运行化妆我第一次有两个错误，这些错误在相同：

/home/lex/Documents/cs/games/SuperMarioWorld/EventEngine/Listeners/NewForegroundItemReadListener.cpp:21:95: error: taking address of temporary [-fpermissive] 
m_graphicsEngine->UpdateForegroundItem(&(_event->GetDisplayableObject()->GetInfoForDisplay()));

所以我不得不将其固定NewPipeReadListener.cpp在线24和NewForegroundItemReadListener.cpp在线24.我固定它是这样的：

InfoForDisplay temp = _event->GetPipe()->GetInfoForDisplay(); 
m_graphicsEngine->UpdateForegroundItem(&temp);

现在，生成文件给我一个错误，我无法修复，因为我不明白一个字..我想在这里包括整个错误消息，但Stackoverflow不允许我这样做...
但它是这样开始的。

[ 2%] Linking CXX executable SuperMarioWorld 
CMakeFiles/SuperMarioWorld.dir/EventEngine/Listeners/KeyboardListener.cpp.o: In function `KeyboardListener::onEvent(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, Event*)': 
/home/lex/Documents/cs/games/SuperMarioWorld/EventEngine/Listeners/KeyboardListener.cpp:12: undefined reference to `KeyboardEvent::GetType()' 
/home/lex/Documents/cs/games/SuperMarioWorld/EventEngine/Listeners/KeyboardListener.cpp:13: undefined reference to `KeyboardEvent::GetKey()' 
/home/lex/Documents/cs/games/SuperMarioWorld/EventEngine/Listeners/KeyboardListener.cpp:14: undefined reference to `KeyboardEvent::GetType()' 
/home/lex/Documents/cs/games/SuperMarioWorld/EventEngine/Listeners/KeyboardListener.cpp:15: undefined reference to `KeyboardEvent::GetKey()' 
CMakeFiles/SuperMarioWorld.dir/Game/CollisionHandler.cpp.o: In function `CollisionHandler::HandleCollisionsWithMapEdges(MovingObject&)': 
/home/lex/Documents/cs/games/SuperMarioWorld/Game/CollisionHandler.cpp:25: undefined reference to `DisplayableObject::GetCoordinates() const' 
CMakeFiles/SuperMarioWorld.dir/Game/CollisionHandler.cpp.o: In function `CollisionHandler::DetectCollisionWithObj(MovingObject&, DisplayableObject&)':

我将不胜感激，如果有人可以帮助我了解这个错误，并且可能使我的系统上运行的项目。

编辑：固定这是包括EventEngine/KeyboardEvent.cpp的第一个错误后，它链接到一个100％，吐出了以下错误消息：

[100%] Linking CXX executable SuperMarioWorld 
CMakeFiles/SuperMarioWorld.dir/Game/CollisionHandler.cpp.o: In function `CollisionHandler::HandleCollisionsWithMapEdges(MovingObject&)': 
/home/lex/Documents/cs/games/SuperMarioWorld/Game/CollisionHandler.cpp:25: undefined reference to `DisplayableObject::GetCoordinates() const' 
CMakeFiles/SuperMarioWorld.dir/Game/CollisionHandler.cpp.o: In function `CollisionHandler::DetectCollisionWithObj(MovingObject&, DisplayableObject&)': 
/home/lex/Documents/cs/games/SuperMarioWorld/Game/CollisionHandler.cpp:40: undefined reference to `DisplayableObject::GetCoordinates() const' 
/home/lex/Documents/cs/games/SuperMarioWorld/Game/CollisionHandler.cpp:40: undefined reference to `DisplayableObject::GetCoordinates() const' 
CMakeFiles/SuperMarioWorld.dir/Game/CollisionHandler.cpp.o: In function `CollisionHandler::ReactToCollisionsWithObj(MovingObject&, DisplayableObject&, CollisionDirection)': 
/home/lex/Documents/cs/games/SuperMarioWorld/Game/CollisionHandler.cpp:45: undefined reference to `DisplayableObject::GetCoordinates() const' 
CMakeFiles/SuperMarioWorld.dir/Game/CollisionHandler.cpp.o: In function `CollisionHandler::HandleCollisionWithRect(unsigned int, sf::Rect<float>)': 
/home/lex/Documents/cs/games/SuperMarioWorld/Game/CollisionHandler.cpp:73: undefined reference to `DisplayableObject::GetCoordinates() const' 
CMakeFiles/SuperMarioWorld.dir/Game/CollisionHandler.cpp.o:/home/lex/Documents/cs/games/SuperMarioWorld/Game/CollisionHandler.cpp:138: more undefined references to `DisplayableObject::GetCoordinates() const' follow 
CMakeFiles/SuperMarioWorld.dir/Game/GameEngine.cpp.o: In function `GameEngine::UpdateForegroundItem(unsigned int, sf::Rect<float>)': 
/home/lex/Documents/cs/games/SuperMarioWorld/Game/GameEngine.cpp:114: undefined reference to `DisplayableObject::SetCoordinates(sf::Rect<float>)' 
CMakeFiles/SuperMarioWorld.dir/Game/LevelImporter.cpp.o: In function `LevelImporter::StoreFloor()': 
/home/lex/Documents/cs/games/SuperMarioWorld/Game/LevelImporter.cpp:180: undefined reference to `DisplayableObject::DisplayableObject(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, sf::Vector2<float>, State)' 
CMakeFiles/SuperMarioWorld.dir/System/Characters/MovingObject.cpp.o: In function `MovingObject::MovingObject(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, sf::Vector2<float>, State)': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Characters/MovingObject.cpp:5: undefined reference to `DisplayableObject::DisplayableObject(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, sf::Vector2<float>, State)' 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Characters/MovingObject.cpp:5: undefined reference to `DisplayableObject::~DisplayableObject()' 
CMakeFiles/SuperMarioWorld.dir/System/Characters/MovingObject.cpp.o: In function `MovingObject::MovingObject(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, float, float, State)': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Characters/MovingObject.cpp:10: undefined reference to `DisplayableObject::DisplayableObject(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, float, float, State)' 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Characters/MovingObject.cpp:10: undefined reference to `DisplayableObject::~DisplayableObject()' 
CMakeFiles/SuperMarioWorld.dir/System/Characters/MovingObject.cpp.o: In function `MovingObject::~MovingObject()': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Characters/MovingObject.cpp:25: undefined reference to `DisplayableObject::~DisplayableObject()' 
CMakeFiles/SuperMarioWorld.dir/System/Characters/MovingObject.cpp.o: In function `MovingObject::GetInfoForDisplay()': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Characters/MovingObject.cpp:32: undefined reference to `DisplayableObject::GetInfoForDisplay()' 
CMakeFiles/SuperMarioWorld.dir/System/Characters/MovingObject.cpp.o:(.rodata._ZTI12MovingObject[_ZTI12MovingObject]+0x10): undefined reference to `typeinfo for DisplayableObject' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Box.cpp.o: In function `Box::Box(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, sf::Vector2<float>, State)': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Items/Box.cpp:3: undefined reference to `DisplayableObject::DisplayableObject(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, sf::Vector2<float>, State)' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Box.cpp.o: In function `Box::Box(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, float, float, State)': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Items/Box.cpp:8: undefined reference to `DisplayableObject::DisplayableObject(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, float, float, State)' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Box.cpp.o:(.rodata._ZTV3Box[_ZTV3Box]+0x20): undefined reference to `DisplayableObject::GetInfoForDisplay()' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Box.cpp.o: In function `Box::~Box()': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Items/Box.hpp:9: undefined reference to `DisplayableObject::~DisplayableObject()' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Box.cpp.o:(.rodata._ZTI3Box[_ZTI3Box]+0x10): undefined reference to `typeinfo for DisplayableObject' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Pipe.cpp.o: In function `Pipe::Pipe(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, sf::Vector2<float>, int, PipeType, EventEngine*)': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Items/Pipe.cpp:5: undefined reference to `DisplayableObject::DisplayableObject(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, sf::Vector2<float>, State)' 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Items/Pipe.cpp:5: undefined reference to `DisplayableObject::~DisplayableObject()' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Pipe.cpp.o: In function `Pipe::~Pipe()': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Items/Pipe.cpp:14: undefined reference to `DisplayableObject::~DisplayableObject()' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Pipe.cpp.o: In function `Pipe::SpawnEnemyIfTimeElapsed()': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Items/Pipe.cpp:50: undefined reference to `DisplayableObject::DisplayableObject(EventEngine*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, float, float, State)' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Pipe.cpp.o: In function `Pipe::MoveEnemyBeingSpawned(float)': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Items/Pipe.cpp:58: undefined reference to `DisplayableObject::Slide(float, float)' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Pipe.cpp.o: In function `Pipe::IsEnemyReadyToLeavePipe()': 
/home/lex/Documents/cs/games/SuperMarioWorld/System/Items/Pipe.cpp:92: undefined reference to `DisplayableObject::GetCoordinates() const' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Pipe.cpp.o:(.rodata._ZTV4Pipe[_ZTV4Pipe]+0x20): undefined reference to `DisplayableObject::GetInfoForDisplay()' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Pipe.cpp.o:(.rodata._ZTV4Pipe[_ZTV4Pipe]+0x28): undefined reference to `DisplayableObject::UpdateAfterCollision(CollisionDirection, ObjectClass)' 
CMakeFiles/SuperMarioWorld.dir/System/Items/Pipe.cpp.o:(.rodata._ZTI4Pipe[_ZTI4Pipe]+0x10): undefined reference to `typeinfo for DisplayableObject' 
collect2: error: ld returned 1 exit status 
CMakeFiles/SuperMarioWorld.dir/build.make:957: recipe for target 'SuperMarioWorld' failed 
make[2]: *** [SuperMarioWorld] Error 1 
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/SuperMarioWorld.dir/all' failed 
make[1]: *** [CMakeFiles/SuperMarioWorld.dir/all] Error 2 
Makefile:127: recipe for target 'all' failed 
make: *** [all] Error 2

EDIT2：现在，我觉得自己笨，有另一个文件，我忘了包括，它是System/DisplayableObject.cpp。

谢谢大家的帮助！

来源

2017-03-07 ger_mt_runner

错误“未定义的引用”意味着函数被声明为*（在某个头文件中），而未定义**（没有代码）。例如，'KeyboardEvent :: GetKey（）'函数的代码包含在源文件'EventEngine/KeyboardEvent.cpp'中，但是你不编译它。 – Tsyvarev

至于问题文本格式，您可以使用符号'>'，它用于*引号*。代码格式化通过以4个空格开始行或使用所选文本上的工具“{}”来实现。错误日志也一样。 – Tsyvarev

谢谢！这是它的一部分问题。我现在更新了这个问题。也感谢格式化提示。 –

您没有包含构建中的所有源文件。

例如，在您的错误消息中，链接器抱怨说它缺少KeyboardEvent::GetType()函数的定义。

搜索github上的仓库KeyboardEvent将很快告诉您，此功能在EventEngine/KeyboardEvent.cpp中定义，该功能不属于您的CMake的SOURCE_FILES的一部分。

您可能会错过其他源文件。尝试修复链接器错误，直到它编译。

来源

2017-03-07 07:50:14 ComicSansMS

谢谢，这解决了我的问题的很大一部分！这实际上是我错过的唯一源文件。编译状态现在是100％，但在此之后它仍然吐出一个错误。 –

理解出错信息

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