There's something weird going on with Fortran's -ffixed-line-length
options, and in how the lang.opt files get processed to produce the
--help results from cc1 (and cc1plus, f951, etc.).
Specifically, the fortran/lang.opt file contains the following lines:
-----------------------------------------------------------------------
ffixed-line-length-none
Fortran RejectNegative
Allow arbitrary character line width in fixed mode
ffixed-line-length-
Fortran RejectNegative Joined UInteger
-ffixed-line-length-<n> Use n as character line width in fixed mode
-----------------------------------------------------------------------
These are, so far as I know, quite definitely Fortran-specific concepts,
and thus the options only make sense in Fortran. However, there are
also the following rather mysterious lines in c.opt:
-----------------------------------------------------------------------
ffixed-line-length-none
C ObjC
ffixed-line-length-
C ObjC Joined
-----------------------------------------------------------------------
Thus, when one runs "cc1 --help" or "f951 --help", these lines of
documentation show up under the C section, not under the Fortran section.
As best I can tell, these options are not actually handled in C or ObjC;
grepping for OPT_ffixed in the gcc directory only finds the handling of
the global "-ffixed-*" option in opts.c. And there's no mention of them
in the GCC manual.
Thus: Are these lines in c.opt irrelevant, or do they do something
meaningful? Should they be there at all? If I introduce some other
options starting with "ffixed", do I need to add similar lines for them
in c.opt?
- Brooks
