configure: add --version flag

Standard autoconf scripts include a --version flag so people can easily
query things.  Add this to qemu's configure so it too can integrate with
build systems that have standard autotool helpers.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/configure b/configure
index faaed60540..ae97e11a97 100755
--- a/configure
+++ b/configure
@@ -494,6 +494,8 @@ for opt do
   case "$opt" in
   --help|-h) show_help=yes
   ;;
+  --version|-V) exec cat $source_path/VERSION
+  ;;
   --prefix=*) prefix="$optarg"
   ;;
   --interp-prefix=*) interp_prefix="$optarg"