Xcode, Duplicate symbol _main

Question

I have duplicate symbol _main.

The problem is it says \"Duplicate symbol _main in /Users/.../i386/main-B9843B6026D6EFA4.o and /Users/.../i386/main-B9843B6026D6EFA4.o

Answer 1

In my case, I had imported another project, in order to utilize a library contained within. It resulted my project having two main.m files.

This was even more confusing, since the error didn't show up until several builds later.