f2c is a Fortran 77 to C compiler (translates fortran to C). A script, f2c-f77, is included which works with f2c and the C compiler to emulate a f77 fortran compiler. f2c is distributed by netlib. There do not appear to be released versions of f2c with an assigned version number. When updates are made, the "changes" file is updated, but there is no associated version number. I don't have any suggestions for keeping track of the version except to consult the "changes" file which will be installed as ${PREFIX}/share/doc/f2c/changes for reference.