Xcode duplicate symbol error

Question

I am getting \"Apple Mach-O Linker (Id) Error\":

ld: duplicate symbol _matrixIdentity in /BlahBlah/Corridor.o and /Blahblah/Drawable.o for architecture i386
         


        

Answer 1

Two solutions to your problem:

1. Declare only void matrixIdentity(mat4 m); in the header file and then implment the actual code in a corresponding c/m file.

2. Make your function in the header file inline (that's the technique Apple uses)

   inline void matrixIdentity(mat4 m) { ...