gdb/147: Eliminate unused argument warnings using ATTRIBUTE_UNUSED.

[ac131313@cygnus.com]

>Number:         147
>Category:       gdb
>Synopsis:       Eliminate unused argument warnings using ATTRIBUTE_UNUSED.
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Fri Jul 06 20:18:03 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     ac131313@cygnus.com
>Release:        unknown-1.0
>Organization:
>Environment:

>Description:
Eliminate unused argument warnings using ATTRIBUTE_UNUSED.

The benefits on this one are thought to be marginal - GDBs design
means that unused parameters are very common.  GCC 3.0 will also
include the option -Wno-unused-parameter which means that ``-Wall
-Wno-unused-parameters -Werror'' can be specified.
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: