我正在尝试从clang构建PrintFunctionNames示例。但是我收到以下错误：
[mac-osx:clang/examples/PrintFunctionNames] osx% clang++ -std=c++0x PrintFunctionNames.cpp
In file included from PrintFunctionNames.cpp:15:
In file included from /usr/local/include/clang/Frontend/FrontendPluginRegistry.h:13:
In file included from /usr/local/include/clang/Frontend/FrontendAction.h:22:
In file included from /usr/local/include/clang/Basic/LLVM.h:22:
In file included from /usr/local/include/llvm/Support/Casting.h:19:
/usr/local/include/llvm/Support/type_traits.h:17:10: fatal error: 'type_traits' file not found
#include <type_traits>
系统信息：
clang版本4.0.0（http://llvm.org/git/clang.git 6197d01def79876e2c1670ced871e10b12c36241）（http://llvm.org/git/llvm.git 24f7cd87f70ddcc91d50f77e405420c0c27853fd）目标：x86_64-apple-darwin15.6.0线程模型InstalledDir：/ usr / local / bin
OSX 10.11.6
编辑1：
在进行Alex建议的更改时，我开始遇到标题问题。通过include修复它时，再次抛出相同的错误
% clang++ -std=c++0x PrintFunctionNames.cpp -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -I../../../clang/include -I../../../../include -I../../../../../build/include
In file included from PrintFunctionNames.cpp:15:
In file included from ../../../clang/include/clang/Frontend/FrontendPluginRegistry.h:13:
In file included from ../../../clang/include/clang/Frontend/FrontendAction.h:22:
In file included from ../../../clang/include/clang/Basic/LLVM.h:22:
In file included from ../../../../include/llvm/Support/Casting.h:19:
../../../../include/llvm/Support/type_traits.h:17:10: fatal error: 'type_traits' file not found
#include <type_traits>
^
1 error generated.
OS X（macOS）有一些不同的方法。您可以安装多个Xcode，并针对不同的平台进行编译。您应该使用-isysroot选项明确指定要针对哪个SDK进行构建。
下面的命令应该可以解决问题
clang++ -std=c++0x PrintFunctionNames.cpp -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk
否则，请检查安装了哪些SDK，并更改的值isysroot以与您的设置相对应。
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