cstdint中的錯誤：全局命名空間中沒有名為xxx的成員

Question

什么會導致這樣的錯誤？ 我向Xcode添加了一個空項目，在Header Search Paths中添加了/ usr / local / lib，並添加了一些opencv庫。 Building出現了這些錯誤：

UPDATE

看來stdint.h確實安裝在我的系統上。 我正在OS 10.9上運行，所以類似int_least16_t這樣的類型，xcode在全局命名空間中找不到，似乎是定義的。

typedef int16_t int_least16_t; 。

find /Applications/Xcode.app -name stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk/usr/include/c++/4.2.1/tr1/stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk/usr/include/stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/usr/include/c++/4.2.1/tr1/stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/usr/include/stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/include/c++/4.2.1/tr1/stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/include/stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/c++/4.2.1/tr1/stdint.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/stdint.h
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/5.1/include/stdint.h

Answer 1

感謝@nm，我了解到直接在/usr/local下安裝任何東西都會因為隨后的版本地獄而被打破。 我可能在/usr/local/include有一些不良的來源，所以當我用/usr/local/Cellar/opencv/2.4.8.2/include/opencv2替換usr/local/include時（因為我使用brew安裝了opencv）在Xcode > Build Settings > Header Search Paths （使用遞歸True）一切正常。