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There are a fair number of related questions out there already, but I'm just not getting this resolved. I'm building an application that includes two separate static libraries: RestKit and another that's on NDA. When I build, I'm getting a Apple Mach-O linker error as follows: 

duplicate symbol _NewBase64Decode 
in /Users/geraldwburke/Desktop/iOS Programming/MyApp/someLib.a(NSData+Base64.o) 
and /Users/geraldwburke/Library/Developer/Xcode/DerivedData/MyAppddlwzdeskfwaxyargomvfhurvxzi/Build/Products/Debug-iphoneos/libRestKit.a(NSData+Base64.o) 
for architecture armv7

Now, I've seen some potential fixes out there. This article seemed promising. I also tried to add a build rule using the script from this blog entry. I've tried adding and removing -ObjC, -all_load, and -force_load linker flags. No matter what I have tried, I still get that same error. Does anyone have any idea how to fix this?

BTW I will delete my identical post. Posted it on the wrong acct.

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geraldWilliam
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1 Answers1

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The easiest solution is to modify the source code of one of those libraries to not define NewBase64Decode. RestKit is open source; I don't know if you have the source to your secret NDA library.

rob mayoff
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  • Modify source code to _not_ define NewBase64Decode or change NewBase64Decode to something else (MyNewBase64Decode perhaps!) – sherlock Oct 09 '12 at 05:24