duplicate symbol _OBJC_CLASS_$_GTMBase64

Question

duplicate symbol _OBJC_CLASS_$_GTMBase64 in: ../../TCWeiboSDK/libTCWeiboSDK.a(GTMBase64.o) ../../TBPlatform.framework/TBPlatform(GTMBase64.o)

duplicate symbol _OBJC_METACLASS_$_GTMBase64 in: ../../TCWeiboSDK/libTCWeiboSDK.a(GTMBase64.o) ../../TBPlatform.framework/TBPlatform(GTMBase64.o)

ld: 2 duplicate symbols for architecture i386

clang: error: linker command failed with exit code 1 (use -v to see invocation)

This is my error. I already know the reason is both of two lib contain a class named GTMBase64, but these two lib are not open source. So I couldn't modify the source code easily.

I ever unpack both .a file using "otool" command and find that assembler code of GTMBase64 in these two lib is different. At last, I have no idea how to fix this problem.

Answer 1

There are a few answers to this problem.

• You can wrap them each in their own wrapper (see: https://stackoverflow.com/a/6538625/1298400)
• You can rewrite them using objcopy (see: https://stackoverflow.com/a/6940389/1298400)
• You can rewrite them with a Hex Editor (see: https://stackoverflow.com/a/15347275/1298400)

All of them are heavy wizardry and you will need to be careful to avoid very bad things.