[Bug c++/90464] New: Documentation: incorrect description of -Wunused

[gennaro.prota+gccbugzilla at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90464

            Bug ID: 90464
           Summary: Documentation: incorrect description of -Wunused
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gennaro.prota+gccbugzilla at gmail dot com
  Target Milestone: ---

The documentation for the -Wunused option says:

  "All the above -Wunused options combined". (1)

This would include -Wunused-const-variable, which means
-Wunused-const-variable=2. The latter, however, must be explicitly requested
and is not enabled when -Wunused is enabled.

I propose to change (1) to:

  "All the above -Wunused options combined, except those for which this manual
says they must be explicitly requested."