Update. With fc15+ and glibc/gfortran 4.6+ you need to add the flag -fno-whole-file to FOPT in Makeinc.linux64_gfortran (or appropriate file). I added new Makeinc files for these systems here: http://github.com/Unidata/gempak/blob/master/config/Makeinc.linux64_gfortran_fedora -mj Ticket Details =================== Ticket ID: JZH-369433 Department: Support GEMPAK Priority: Normal Status: Open