为MacOSX构建,但链接针对iOS模拟器文件构建的dylib

Question

我刚刚使用2013年4月15日的命令行工具升级到Xcode 5 beta,并且在标准CMakeTestCCompiler.cmake尝试编译简单测试程序期间运行cmake构建时遇到以下警告:

cmake -version
cmake version 2.8.11.2

ld: building for MacOSX, but linking against dylib built for iOS Simulator file '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk/usr/lib/libSystem.dylib' for architecture i386

lipo -info /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk/usr/lib/libSystem.dylib
Non-fat file: libSystem.dylib is architecture: i386

编译步骤是:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc -arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk -o /Users/temp/testCCompiler.c.o -c /Users/temp/testCCompiler.c

lipo -info /Users/temp/testCCompiler.c.o 
Non-fat file: testCCompiler.c.o is architecture: i386

链接步骤是:

/usr/local/bin/cmake -E cmake_link_script /Users/temp/link.txt --verbose=1

其中link.txt包含:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc -arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk -Wl,-headerpad_max_install_names /Users/temp/testCCompiler.c.o -o testCCompiler

似乎testCCompiler.co和libSystem.dylib都是i386,i386是在link.txt中指定的,而i386是模拟器的正确架构,所以我不确定为什么它认为它是为MacOSX构建的.也许命令行选项是错误的:(.

谢谢你的帮助!

Answer 1

问题是Xcode 5用clang替换了gcc并添加了一个"-triple"选项,指定OSX作为目标.如果你在两个gcc命令行上传递"-miphoneos-version-min = 7.0",它就可以工作.如果将"--verbose"传递给gcc,则可以看到clang命令行.还需要添加到Xcode 5的PATH,以便cmake可以找到必要的工具:export PATH =/Applications/Xcode5-DP6.app/Contents/Developer/Toolchains/XcodeDefault.xct oolchain/usr/bin:/ Applications /Xcode5-DP6.app/Contents/Developer/usr/bin:$PATH这些都不是官方的..但到目前为止对我有用.