> Sigh. yum -y install *77 did the trick just after I sent that email. Found > compat-gcc-77 and its requirements. Sorry for the wasted bandwidth... Just for you info, that will give you the old GCC 3.2.3 F77 compiler as part of the gcc32 suite . If instead you wish to use the new F95 compiler that comes with the default FC5 gcc version (4.1.1) (should handle F77 code fine) then simply use the command "gfortran" instead of "g77". cheers Chris jonesc@localhost ~ > g77 --version GNU Fortran (GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-55.fc5)) 3.2.3 20030502 (Red Hat Linux 3.2.3-13) Copyright (C) 2002 Free Software Foundation, Inc. jonesc@localhost ~ > gfortran --version GNU Fortran 95 (GCC) 4.1.1 20060525 (Red Hat 4.1.1-1) Copyright (C) 2006 Free Software Foundation, Inc.