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

Based on the work in this commit:

  commit fb2ded33c1
  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>

gdb/Makefile.in

@@ -2352,18 +2352,15 @@ run: Makefile
 jit-reader.h: $(srcdir)/jit-reader.in config.status
 	$(ECHO_GEN) $(SHELL) config.status $(SILENT_FLAG) $@
 
-gcore: $(srcdir)/gcore.in config.status
+gstack.in gcore.in: %.in : $(srcdir)/%-1.in config.status
 	$(ECHO_GEN) $(SHELL) config.status $(SILENT_FLAG) $@
 
-gstack: gstack.in version.c
+gstack gcore: % : %.in version.c
 	$(ECHO_GEN) \
 	vv=`grep 'version\[\] = ' version.c | grep -o '".*"' | tr -d \"`; \
 	sed -e "s,@VERSION@,$$vv," $< > $@
 	@chmod +x $@
 
-gstack.in: $(srcdir)/gstack-1.in config.status
-	$(ECHO_GEN) $(SHELL) config.status $(SILENT_FLAG) $@
-
 gdb-gdb.py: $(srcdir)/gdb-gdb.py.in config.status
 	$(ECHO_GEN) $(SHELL) config.status $(SILENT_FLAG) $@
 

gdb/NEWS

@@ -26,6 +26,9 @@
 
 * Linux checkpoint code has been updated to work with multiple inferiors.
 
+* The gcore script now has a -v or --version option, which prints the
+  version number, and then exits.
+
 * New commands
 
 maintenance check psymtabs

gdb/configure

@@ -33775,7 +33775,7 @@ fi
   fi
 
 
-ac_config_files="$ac_config_files gcore"
+ac_config_files="$ac_config_files gcore.in:gcore-1.in"
 
 ac_config_files="$ac_config_files gstack.in:gstack-1.in"
 
@@ -34878,7 +34878,7 @@ do
     "default-1") CONFIG_COMMANDS="$CONFIG_COMMANDS default-1" ;;
     "jit-reader.h") CONFIG_FILES="$CONFIG_FILES jit-reader.h:jit-reader.in" ;;
     "nm.h") CONFIG_LINKS="$CONFIG_LINKS nm.h:$GDB_NM_FILE" ;;
-    "gcore") CONFIG_FILES="$CONFIG_FILES gcore" ;;
+    "gcore.in") CONFIG_FILES="$CONFIG_FILES gcore.in:gcore-1.in" ;;
     "gstack.in") CONFIG_FILES="$CONFIG_FILES gstack.in:gstack-1.in" ;;
     "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
     "gdb-gdb.gdb") CONFIG_FILES="$CONFIG_FILES gdb-gdb.gdb" ;;
@@ -36425,7 +36425,6 @@ _LT_EOF
       esac
     done ;;
     "nm.h":L) echo > stamp-nmh ;;
-    "gcore":F) chmod +x gcore ;;
 
   esac
 done # for ac_tag

gdb/configure.ac

@@ -2278,7 +2278,7 @@ GDB_AC_SELFTEST([
 
 GDB_AC_TRANSFORM([gdb], [GDB_TRANSFORM_NAME])
 GDB_AC_TRANSFORM([gcore], [GCORE_TRANSFORM_NAME])
-AC_CONFIG_FILES([gcore], [chmod +x gcore])
+AC_CONFIG_FILES([gcore.in:gcore-1.in])
 AC_CONFIG_FILES([gstack.in:gstack-1.in])
 AC_CONFIG_FILES([Makefile gdb-gdb.gdb gdb-gdb.py doc/Makefile data-directory/Makefile])
 

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
 

gdb/gcore-1.in

@@ -20,6 +20,9 @@
 # It starts up gdb, attaches to the given PID and invokes the gcore command.
 #
 
+PKGVERSION=@PKGVERSION@
+VERSION=@VERSION@
+
 # Need to check for -o option, but set default basename to "core".
 prefix=core
 
@@ -29,8 +32,18 @@ dump_all_cmds=()
 
 data_directory_opt=()
 
-while getopts :ao:d: opt; do
-    case "$opt" in
+function print_version() {
+    echo "GNU gcore (${PKGVERSION}) ${VERSION}"
+}
+
+while getopts :vao:d:-: OPT; do
+    if [ "$OPT" = "-" ]; then
+	OPT="${OPTARG%%=*}"
+	OPTARG="${OPTARG#'$OPT'}"
+	OPTARG="${OPTARG#=}"
+    fi
+
+    case "$OPT" in
         a)
             case "$OSTYPE" in
                 linux*)
@@ -45,8 +58,12 @@ while getopts :ao:d: opt; do
         d)
             data_directory_opt=("--data-directory" "$OPTARG")
             ;;
+	v | version)
+	    print_version
+	    exit 0
+	    ;;
         *)
-            echo "usage:  @GCORE_TRANSFORM_NAME@ [-a] [-o prefix] [-d data-directory] pid1 [pid2...pidN]"
+            echo "usage:  @GCORE_TRANSFORM_NAME@ [-v | --version] [-a] [-o prefix] [-d data-directory] pid1 [pid2...pidN]"
             exit 2
             ;;
     esac