osx - C Compilation error on mac -

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gcc -c -o fsbench.o fsbench.c -o3 -wall -wextra gcc -o fsbench fsbench.o -o3 -wall -wextra -lpthread undefined symbols architecture x86_64:  "_reposition_offset", referenced from:   _perf_io in fsbench.o ld: symbol(s) not found architecture x86_64 clang: error: linker command failed exit code 1 (use -v see     invocation) make: *** [fsbench] error 1

i not able compile program on mac. keeps throwing error. tried several things , not able compile without error.


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