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在Xcode 6 beta里编译Cocos2d-x iOS项目时可能会失败，提示如下错误：
Undefined symbols for architecture i386:
"_fwrite$UNIX2003", referenced from:
_unixErrorHandler in libcocos2dx iOS.a(tif_unix.o)
_unixWarningHandler in libcocos2dx iOS.a(tif_unix.o)
_empty_output_buffer in libcocos2dx iOS.a(jdatadst.o)
_term_destination in libcocos2dx iOS.a(jdatadst.o)
_Fax3PrintDir in libcocos2dx iOS.a(tif_fax3.o)
_PredictorPrintDir in libcocos2dx iOS.a(tif_predict.o)
"_strerror$UNIX2003", referenced from:
_TIFFOpen in libcocos2dx iOS.a(tif_unix.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
如下图所示：
解决方法很简单，只需要在AppDelegate.cpp中加入如下代码即可：
extern"C"{
size_t fwrite$UNIX2003( constvoid *a, size_t b, size_t c, FILE *d )
{
return fwrite(a, b, c, d);
}
char* strerror$UNIX2003( int errnum )
{
return strerror(errnum);
}
}