Undefined symbols for architecture x86_64 error on fortran compiling

[Ryan Schmidt]

On Dec 11, 2013, at 01:40, Gmail wrote:

> When I compile a fortran code, I got the error 
> Undefined symbols for architecture x86_64
> 
> My mac is 64bits. The fortran compiler used here is ifort.

The relevant information would be *what* symbols were undefined, what your code looks like, and where those symbols are actually defined.