How to resolve duplicate symbol link static library

Submitted by lepton on Fri, 05/20/2016 - 11:35


首先从静态库中解压 .o 文件

ar -x lib.a

nm查看符号表  找到重复的函数符号名

nm a.o


0000000000000000 T __Z4testv //c++

0000000000000000 T test //c


隐藏符号 相当于加 static

ld -r a.o -unexported_symbol  __Z4testv -o c.o; rm a.o; mv c.o a.o //mac 下可使用

objcopy --localize-symbol=_Z4testv a.o


ld -r a.o -alias __Z4testv test_c  -unexported_symbol  __Z4testv -o c.o //mac 下可使用

objcopy --redefine-sym _Z4testv=test_a a.o

如果其他 .o文件引用了这个函数 对每一个文件都要执行

find ./ -name "*.o" -exec objcopy --redefine-sym _Z4testv=test_a {} \;


c语言可以 函数改名变成foo_test
c++因为引入了很多系统函数 只能用上面的方法一个一个该

objcopy --prefix-symbols=foo_ a.o


ar crs lib.a *.o


Andrew (not verified)

Thu, 03/21/2019 - 14:36

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