Found at: http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/3228dcee5e3d57c7
Some compilers (such as ifort) allow symbols which start with a $ sign - and they allow IMPLICT with $. gfortran currently does not recognize these. Solution: a) Support it as ifort does b) Document the non-support in the -fdollar-ok documentation. -- Summary: Support $ as first character in symbol names and in IMPLICT Product: gcc Version: 4.4.0 Status: UNCONFIRMED Severity: enhancement Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: burnus at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36382