Qt5.2.1 Mac 10.9 Undefined symbols for architecture x86_64 错误解决

更新Mac 10.9.2后，之前的Qt程序运行出现以下错误：

Undefined symbols for architecture x86_64:

  "___sincos_stret", referenced from:
      ...
  "___sincos_stret", referenced from:
      ...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [trimeshview.app/Contents/MacOS/trimeshview] Error 1
14:30:06: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project trianglemesh (kit: Desktop Qt 5.2.1 clang 64bit)
When executing step 'Make'
14:30:06: Elapsed time: 00:16.

原因是编译器和sdk版本不匹配，需要在项目中添加：

macx:QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.9
macx:QMAKE_MAC_SDK=macosx10.9

注：如果Qt出现编译问题，可直接查看生成的makefile文件获取错误信息，本次错误状态下，makefile文件如下：

Release:


/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.