Installing with OpenMP support on OSX docs section outdated?

[navidcy]

I tried to install OpenMP on Mac OS X as described in the introduction

pyqg/docs/installation.rst

Line 244 in f700369

$ brew install gcc --without-multilib --with-fortran

but I got these errors

navid:~/ $ brew install gcc --without-multilib --with-fortran                                    [9:02:00]
Usage: brew install [options] formula
[...]
Error: invalid option: --without-multilib

navid:~/ $ brew install gcc --with-fortran                                    [9:02:00]
Usage: brew install [options] formula
[...]
Error: invalid option: --with-fortran