I have some code that I have been compiling for windows and linux using gcc, g++, and g77. I would like to take a look at compiling the same code for OSX. I have vbox VMs for the different OSs I compile on and would set one up for snow leopard or mountain lion. I am interested in information about the best place to download the gnu compilers for use on the mac. I tend to use gcc34, since it has everything I need and is closed and not changing all the time, but I could use gcc4/gfortran.

Any advice as to how to go about this?