在Windows环境下用cocos2d-x完成了一个程序，搬到Mac后编译出错，出错信息如下。
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
Undefined symbols for architecture x86_64:
"EasyButton::createEasyButton(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from:
SettingScene::init() in SettingScene.o
"RadioButton::createRadioButton(EasyButton*, ...)", referenced from:
SettingScene::init() in SettingScene.o
"RadioButton::getSelectedNumber()", referenced from:
SettingScene::test() in SettingScene.o
"RadioButton::setSelectedNumber(int)", referenced from:
SettingScene::init() in SettingScene.o
"ScriptReader::jumpToSign(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from:
GameScene::showSelect(std::__1::map<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > >&)::$_4::operator()(cocos2d::Ref*) const in GameScene.o
"ScriptReader::jumpToSign(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int)", referenced from:
GameScene::reloadScene() in GameScene.o
"ScriptReader::nextScript()", referenced from:
GameScene::init() in GameScene.o
GameScene::dialogClicked() in GameScene.o
GameScene::autoPlay(float) in GameScene.o
"ScriptReader::getInstance()", referenced from:
GameScene::init() in GameScene.o
GameScene::reloadScene() in GameScene.o
GameScene::dialogClicked() in GameScene.o
GameScene::autoPlay(float) in GameScene.o
GameScene::createGameDate() in GameScene.o
GameScene::showSelect(std::__1::map<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > >&)::$_4::operator()(cocos2d::Ref*) const in GameScene.o
GameSystem::saveGameSceneInfo(int) in GameSystem.o
...
"ScriptReader::initWithStage(cocos2d::Node*)", referenced from:
GameScene::init() in GameScene.o
"ScriptReader::loadScriptFile(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)", referenced from:
GameScene::init() in GameScene.o
"ScriptReader::getCurrentSignName()", referenced from:
GameScene::createGameDate() in GameScene.o
GameSystem::saveGameSceneInfo(int) in GameSystem.o
"ScriptReader::getCurrentCommandIndex()", referenced from:
GameScene::createGameDate() in GameScene.o
GameSystem::saveGameSceneInfo(int) in GameSystem.o
"CharactorManager::getInstance()", referenced from:
GameScene::displayCharator(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >) in GameScene.o
GameScene::unDisplayCharator(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >) in GameScene.o
GameScene::reloadScene() in GameScene.o
"CharactorManager::getCharactor(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&)", referenced from:
GameScene::displayCharator(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >) in GameScene.o
GameScene::unDisplayCharator(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >) in GameScene.o
GameScene::reloadScene() in GameScene.o
"BackgroundManager::getInstance()", referenced from:
GameScene::changeBackground(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) in GameScene.o
GameScene::reloadScene() in GameScene.o
"BackgroundManager::getBackground(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)", referenced from:
GameScene::changeBackground(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) in GameScene.o
GameScene::reloadScene() in GameScene.o
"BackgroundMusicManager::getInstance()", referenced from:
GameScene::playBackgroundMusic(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) in GameScene.o
"BackgroundMusicManager::getBackgroundMusic(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)", referenced from:
GameScene::playBackgroundMusic(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) in GameScene.o
"Slidebar::createSlidebar(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)", referenced from:
SettingScene::init() in SettingScene.o
"Slidebar::getFloat()", referenced from:
SettingScene::changeMusicVolume() in SettingScene.o
"Slidebar::setFloat(float)", referenced from:
SettingScene::init() in SettingScene.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
首先留意到的是第一句话：Undefined symbols for architecture x86_64
可能是不支持x86_64，在Build Settings->Architectures->Architectures和Build Settings->Architectures->Valid Architectures可以改变设置。根据搜索到的方法进行改变设置后在编译时会出现其他错误（可能是改变设置的方法不对，所以在这里不展示改变设置的方法），而在不改变设置的情况下编译HelloWorld程序成功并且正常运行，因此推断与是否支持x86_64无关。
大部分错误都涉及std::map。
可能C++编译设置有问题，在Build Settings->Apple LLVM 7.0 - Language - C++中对C++ Language Dialect和C++ Standard Library进行设置，分别设置为C++11[-std=C++11]和libc++或者两个都设置为Compilder Default。项目中默认已经设置为后者，同时单独写了一个调用std::map的方法，编译成功且正常运行，因此推断与设置无关。
所有错误表示，找到了方法的声明但找不到对应的实现。
检查了Xcode项目中的Classes文件夹，所有.h文件和.cpp均在其中。
而最终解决问题的方法是将Classes文件夹中的内容拖入Xcode目录中时，弹出的对话框Choose options for adding these files:中的Added folders选择Create groups，问题则解决。
尽管标题带有Cocos2d-x，实际上跟Cocos2d-x没有一点关系。
另外要注意，将Resources文件夹拖入Xcode目录时，应该选择Create folder references。
本站所有文章采用知识共享署名-非商业性使用-禁止演绎 3.0 中国大陆许可协议进行许可。
若未作说明，则本文为「热心人士」原创，转载需注明出处。
本文地址为：https://sunnyrx.com/2016/01/14/About-Undefined-symbols-for-architecture-x86-64-Error/
