问题
I'm trying to make an app that uses Protocol Buffers. I'm getting this error, any idea why?
Ld /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest normal i386
cd /Users/fmota/Documents/Developer/Protobuf/PBTest
setenv MACOSX_DEPLOYMENT_TARGET 10.6
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/clang -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk -L/Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator -F/Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator -filelist /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Intermediates/PBTest.build/Debug-iphonesimulator/PBTest.build/Objects-normal/i386/PBTest.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -Xlinker -no_implicit_dylibs -D__IPHONE_OS_VERSION_MIN_REQUIRED=50000 -framework SystemConfiguration -framework UIKit -framework Foundation -framework CoreGraphics -o /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_AreaRequest_Builder", referenced from:
objc-class-ref in ViewController.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
回答1:
Yes, this is a common problem I've seen.
Check out the answer to this nearly duplicate question and let me know if it solves the issue for you. :-)
回答2:
Add *.pb.h and *.pb.m to "TARGET"->"Build Phases"->"Compile Sources"!
回答3:
My working env is xcode 5.0.2.
Add *.pb.m to "TARGET"->"Build Phases"->"Compile Sources"
Do NOT add *.pb.h, after I added *.pb.h, it cannot link.
来源：https://stackoverflow.com/questions/8745661/undefined-symbols-for-architecture-i386-using-protobuf