In the man page for gfortran, the option "-fd-lines-as-comments" is misspelled as "-fd-lines-as-comment" (note the missing final "s"). This can also be seen in the web documentation at page http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gfortran/Fortran-Dialect-Options.html#Fortran-Dialect-Options
-- Summary: gfortran option description wrong. Product: gcc Version: 4.1.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: gustav dot larsson at honeywell-tsi dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31184