獲取致命錯誤：找不到'type_traits'文件#include <type_traits>，同時構建鐺示例

Question

我正在嘗試從ngng構建PrintFunctionNames示例。 不過，我得到以下錯誤：

[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> 

系統信息：

鐺版本4.0.0（http://llvm.org/git/clang.git 6197d01def79876e2c1670ced871e10b12c36241）（http://llvm.org/git/llvm.git 24f7cd87f70ddcc91d50f77e405420c0c27853fd） 目標：x86_64的 - 蘋果darwin15.6.0 線程模型：POSIX InstalledDir：在/ usr/local/bin目錄

OSX 10.11.6

編輯1：

關於作出亞歷克斯建議的更改，我開始獲取標題問題。通過包含修復它，同樣的錯誤再次拋出

% 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. 

Answer 1

OS X（macOS）有一點不同的方法。你可以安裝好幾個Xcode，併爲不同的平臺編譯。 您應該使用-isysroot選項來明確指定構建哪個SDK。

下面的命令應該做的伎倆

clang++ -std=c++0x PrintFunctionNames.cpp -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk 

否則，請檢查所安裝的SDK和改變isysroot值以符合您的設置。