This is the ancient, entirely unsupported, written-in-Fortran version of Atoms
The Makefiles work on a computer running Ubuntu 13.04 using gfortran from GCC 4.7.3. The resulting executable has been shown to run to completion for one test case. It has not been tested with any other crystal data, on any other computer or with any other compiler.
This source code is being placed on GitHub as a courtesy. I will provide no support of any kind for the use of this software. I will provide no advice for how to compile this software. I will fix no bugs. I will answer no questions. Indeed, any questions or comments you have on this version of the program are likely to be silently ignored. This is obsolete software.
I hope the preceding paragraph is clear.
The entire functionality of this program was reimplemented many years ago and has since been integrated into my Artemis program, a part of Demeter.