Duplicate symbol in static library

0
votes

I'm trying to compile an iOS project for the Simulator in XCode with a 3rd-party static library added to it and I get this linker error message complaining about duplicate symbols:

duplicate symbol _OBJC_CLASS_$_Utility in: libUIExtensions.a(Utility.o) /Users/Joe/Library/Developer/Xcode/DerivedData/PdfSampleProgram-cdoogvkqqrafetcvscffsrlgkvrr/Build/Intermediates/PdfSampleProgram.build/Debug-iphonesimulator/PdfSampleProgram.build/Objects-normal/i386/Utility.o

duplicate symbol _OBJC_METACLASS_$_Utility in: libUIExtensions.a(Utility.o) /Users/Joe/Library/Developer/Xcode/DerivedData/PdfSampleProgram-cdoogvkqqrafetcvscffsrlgkvrr/Build/Intermediates/PdfSampleProgram.build/Debug-iphonesimulator/PdfSampleProgram.build/Objects-normal/i386/Utility.o

ld: 2 duplicate symbols for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation)

Any idea what I could do with the project? I've only added the static library once to the project, the header files for the static libs seem ok. Am I missing something in the project settings?

There's another sample project were it compiles fine, but I just don't see any difference.

2
c++iosobjective-cxcodelinker

2 Answers

0
votes

Check duplicates in Build Phases > Compile Sources.

0
votes

There must be 2 same files in your project. You should check libraries or compile sources in build phase or check the project file through finder.