[0/4] RFC: add DWARF index support

[Doug Evans]

On Thu, Aug 5, 2010 at 12:56 PM, Tom Tromey <tromey@redhat.com> wrote:
> Doug> What happens if the script is invoked with none or too many arguments?
>
> Oops, forgot this one.
>
> New patch.
>
> Tom
>
> 2010-08-05  Tom Tromey  <tromey@redhat.com>
>
>        * gdb-add-index.sh: Add error checking.
>
> Index: gdb-add-index.sh
> ===================================================================
> RCS file: /cvs/src/src/gdb/gdb-add-index.sh,v
> retrieving revision 1.1
> diff -u -r1.1 gdb-add-index.sh
> --- gdb-add-index.sh    30 Jul 2010 20:46:34 -0000      1.1
> +++ gdb-add-index.sh    5 Aug 2010 19:56:24 -0000
> @@ -16,14 +16,27 @@
>  # You should have received a copy of the GNU General Public License
>  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
>
> +if test $# -ne 1; then
> +   echo "Usage: gdb-add-index FILE" 1>&2
> +   exit 1
> +fi
> +
>  file="$1"
>  dir="${file%/*}"
>
> -gdb --batch-silent -ex "file $file" -ex "save gdb-index $dir"
> +gdb --batch-silent -ex "file $file" -ex "save gdb-index $dir" || {
> +   # Just in case.

status=$?

> +   rm -f "${file}.gdb-index"
> +   exit 1

exit $status

> +}
>
> +# In some situation gdb can exit without creating an index.  This is
> +# not an error.
> +status=0
>  if test -f "${file}.gdb-index"; then
>    objcopy --add-section .gdb_index="${file}.gdb-index" --set-section-flags .gdb_index=readonly "$file" "$file"
> +   status=$?
>    rm -f "${file}.gdb-index"
>  fi
>
> -exit 0
> +exit $status
>

IWBN to add to the comment about exiting without creating an index not
being an error, e.g. provide an example.
Is it because the file could be stripped?  [If it is stripped, should
the script fail or pass?  Dunno.]

IWBN to put "${file}.gdb-index" in its own variable so that there's
just one instance.

LGTM with the above nits.