gcore: add -v or --version option to show version number

Based on the work in this commit:

  commit fb2ded33c1e519659743047ed7817166545b6d91
  Date:   Fri Dec 20 12:46:11 2024 -0800

      Add gstack script

This commit adds a '-v' or '--version' option to the existing gcore
script.  This new option causes the script to print its version
number, and then exit.

I needed to adjust the getopts handling a little in order to support
the long form '--version' argument, but as this makes gcore more
consistent with gstack, then this seems like a good thing.

The usage message is now getting a little long.  Don't worry, I plan
to clean that up in the next commit.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=32325
Approved-By: Tom Tromey <tom@tromey.com>
Reviewed-By: Eli Zaretskii <eliz@gnu.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 04719bf..ef77657 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -51391,7 +51391,8 @@ Richard M. Stallman and Roland H. Pesch, July 1991.
 
 @format
 @c man begin SYNOPSIS gcore
-gcore [-a] [-o @var{prefix}] [-d @var{directory}] @var{pid1} [@var{pid2}...@var{pidN}]
+gcore [-v | --version] [-a] [-o @var{prefix}] [-d @var{directory}]
+      @var{pid1} [@var{pid2}...@var{pidN}]
 @c man end
 @end format
 
@@ -51423,6 +51424,10 @@ If not specified, @var{prefix} defaults to @var{gcore}.
 @item -d @var{directory}
 Use @var{directory} as the data directory when invoking @value{GDBN} for running
 the gcore command. This argument is optional.
+
+@item --version
+@itemx -v
+Print version information and then exit.
 @end table
 @c man end