[bug #68600] [troff] make `--version` output report font and macro search paths

URL:
  <https://savannah.gnu.org/bugs/?68600>

                 Summary: [troff] make `--version` output report font and
macro search paths
                   Group: GNU roff
               Submitter: gbranden
               Submitted: Thu 06 Aug 2026 12:57:42 PM UTC
                Category: Core
                Severity: 1 - Wish
              Item Group: Feature change
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Unlocked
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Thu 06 Aug 2026 12:57:42 PM UTC By: G. Branden Robinson <gbranden>
Inspired by bug #68597.

Several factors influence the construction of the font and macro search paths:
selection of `-U` unsafe mode, environment variables, `-F` and `-M` option
arguments, and build configuration.

Make _troff_ report these data when run with `-v`/`--version`, honoring the
affect of any other command-line options that influence the population of the
search paths.

This change will require some minor refactoring of GNU _troff_'s `main()` when
handling "case 'v'" of _getopt_long_(3)'s return value.  Presently, that case
_exit_(3)s immediately.










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