XCode 4.3 中 stdlib.h 的位置是什么？
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What is the location of stdlib.h in XCode 4.3?
提问by Jake Badlands
Please tell me, what is the location of stdlib.h in XCode 4.3 ?
请告诉我，stdlib.h 在 XCode 4.3 中的位置是什么？
采纳答案by trojanfoe
What was in /Developerin Xcode versions prior to 4.3 is now within the Xcode.appbundle. There are several, one for each supported SDK and Platform:
什么是/Developer在之前4.3版本的Xcode现在是内Xcode.app包。有几个，每个支持的 SDK 和平台一个：
$ find /Applications/Xcode.app -name stdlib.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/usr/include/c++/4.2.1/tr1/stdlib.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/usr/include/stdlib.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/usr/include/c++/4.2.1/tr1/stdlib.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/usr/include/stdlib.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk/usr/include/c++/4.2.1/tr1/stdlib.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk/usr/include/stdlib.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/4.2.1/tr1/stdlib.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/usr/include/stdlib.h
回答by bames53
If you install the command line tools (Xcode > Preferences > Downloads), then the file is present at/usr/include/stdlib.h.
如果您安装命令行工具（Xcode > Preferences > Downloads），则该文件位于/usr/include/stdlib.h.
回答by larick
I think you should be using unistd.hinstead of stdlib.h. I had an issue trying to use sleep() when importing stdlib.hand I had to import unistd.h.
我认为你应该使用unistd.h而不是stdlib.h. 我在导入时尝试使用 sleep() 时遇到问题stdlib.h，我不得不导入unistd.h.
