请教一下这是什么问题？
Libtool /Users/renren/Library/Developer/Xcode/DerivedData/dddz-dubzpuribocbcqcyrbqpuymjyumm/Build/Products/Debug-iphonesimulator/libcocos2d\ iOS.a normal x86_64
cd /Users/renren/Documents/cocos/dddz/frameworks/cocos2d-x/build
export IPHONEOS_DEPLOYMENT_TARGET=5.1.1
export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool -static -arch_only x86_64 -syslibroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.3.sdk -L/Users/renren/Library/Developer/Xcode/DerivedData/dddz-dubzpuribocbcqcyrbqpuymjyumm/Build/Products/Debug-iphonesimulator -L/Users/renren/Documents/cocos/dddz/frameworks/cocos2d-x/build/…/external/png/prebuilt/ios -L/Users/renren/Documents/cocos/dddz/frameworks/cocos2d-x/build/…/external/jpeg/prebuilt/ios -L/Users/renren/Documents/cocos/dddz/frameworks/cocos2d-x/build/…/external/tiff/prebuilt/ios -L/Users/renren/Documents/cocos/dddz/frameworks/cocos2d-x/build/…/external/webp/prebuilt/ios -L/Users/renren/Documents/cocos/dddz/frameworks/cocos2d-x/build/…/external/freetype2/prebuilt/ios -L/Users/renren/Documents/cocos/dddz/frameworks/cocos2d-x/build/…/external/curl/prebuilt/ios -L/Users/renren/Documents/cocos/dddz/frameworks/cocos2d-x/build/…/external/websockets/prebuilt/ios -L/Users/renren/Documents/cocos/dddz/frameworks/cocos2d-x/build/…/external/chipmunk/prebuilt/ios -filelist /Users/renren/Library/Developer/Xcode/DerivedData/dddz-dubzpuribocbcqcyrbqpuymjyumm/Build/Intermediates/cocos2d_libs.build/Debug-iphonesimulator/libcocos2d\ iOS.build/Objects-normal/x86_64/libcocos2d\ iOS.LinkFileList -lwebsockets -lcurl -framework Foundation -lpng -ljpeg -ltiff -lchipmunk -lwebp -lfreetype -o /Users/renren/Library/Developer/Xcode/DerivedData/dddz-dubzpuribocbcqcyrbqpuymjyumm/Build/Products/Debug-iphonesimulator/libcocos2d\ iOS.a
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can’t locate file for: -lwebsockets
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lwebsockets is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can’t locate file for: -lcurl
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lcurl is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can’t locate file for: -lpng
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lpng is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can’t locate file for: -ljpeg
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -ljpeg is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can’t locate file for: -ltiff
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -ltiff is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can’t locate file for: -lchipmunk
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lchipmunk is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can’t locate file for: -lwebp
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lwebp is not an object file (not allowed in a library)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can’t locate file for: -lfreetype
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lfreetype is not an object file (not allowed in a library)