用cocoapods 0.38.2 安装 SDK是出现如下错误
Ld /Users/Lance/Library/Developer/Xcode/DerivedData/XListing-fvxbqzqhhjjsvphgsnrrdsntbdwy/Build/Products/Debug-iphonesimulator/AVOSCloudIM.framework/AVOSCloudIM normal i386
cd /Users/Lance/Documents/XListing/Pods
export IPHONEOS_DEPLOYMENT_TARGET=8.0
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/clang -arch i386 -dynamiclib -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.4.sdk -L/Users/Lance/Library/Developer/Xcode/DerivedData/XListing-fvxbqzqhhjjsvphgsnrrdsntbdwy/Build/Products/Debug-iphonesimulator -L/Users/Lance/Documents/XListing/Pods/AVOSCloudIM -F/Users/Lance/Library/Developer/Xcode/DerivedData/XListing-fvxbqzqhhjjsvphgsnrrdsntbdwy/Build/Products/Debug-iphonesimulator -filelist /Users/Lance/Library/Developer/Xcode/DerivedData/XListing-fvxbqzqhhjjsvphgsnrrdsntbdwy/Build/Intermediates/Pods.build/Debug-iphonesimulator/AVOSCloudIM.build/Objects-normal/i386/AVOSCloudIM.LinkFileList -install_name @rpath/AVOSCloudIM.framework/AVOSCloudIM -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @loader_path/Frameworks -Xlinker -objc_abi_version -Xlinker 2 -all_load -undefined dynamic_lookup -lAVOSCloudIMLib -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=8.0 -framework AVOSCloud -framework Foundation -single_module -compatibility_version 3 -current_version 3.1.2 -Xlinker -dependency_info -Xlinker /Users/Lance/Library/Developer/Xcode/DerivedData/XListing-fvxbqzqhhjjsvphgsnrrdsntbdwy/Build/Intermediates/Pods.build/Debug-iphonesimulator/AVOSCloudIM.build/Objects-normal/i386/AVOSCloudIM_dependency_info.dat -o /Users/Lance/Library/Developer/Xcode/DerivedData/XListing-fvxbqzqhhjjsvphgsnrrdsntbdwy/Build/Products/Debug-iphonesimulator/AVOSCloudIM.framework/AVOSCloudIM
duplicate symbol _AVOSCloudIMVersionString in:
/Users/Lance/Library/Developer/Xcode/DerivedData/XListing-fvxbqzqhhjjsvphgsnrrdsntbdwy/Build/Intermediates/Pods.build/Debug-iphonesimulator/AVOSCloudIM.build/Objects-normal/i386/AVOSCloudIM_vers.o
/Users/Lance/Documents/XListing/Pods/AVOSCloudIM/libAVOSCloudIMLib.a(AVOSCloudIM_vers.o)
duplicate symbol _AVOSCloudIMVersionNumber in:
/Users/Lance/Library/Developer/Xcode/DerivedData/XListing-fvxbqzqhhjjsvphgsnrrdsntbdwy/Build/Intermediates/Pods.build/Debug-iphonesimulator/AVOSCloudIM.build/Objects-normal/i386/AVOSCloudIM_vers.o
/Users/Lance/Documents/XListing/Pods/AVOSCloudIM/libAVOSCloudIMLib.a(AVOSCloudIM_vers.o)
ld: 2 duplicate symbols for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
请问是怎么回事啊？