configure script now prints "warning: unrecognized option" and sleeps

for 2 seconds instead of silently ignoring wrong options. This seems
like a good compromise to me (I've typed "./configure --disable-opengl"
about 50 times now, and of course it doesn't work because it's supposed
to say "--disable-gl")


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@611 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba

stella/configure

@@ -316,11 +316,11 @@ for ac_option in $@; do
       --mandir=*)
         _mandir=`echo $ac_option | cut -d '=' -f 2`
         ;;
-#      *)
-#        echo "error: unrecognised option: $ac_option
-#Try \`$0 --help' for more information." >&2
-#        exit 1
-#        ;;
+      *)
+        echo "warning: unrecognised option: $ac_option
+Try \`$0 --help' for more information." >&2
+        sleep 2
+        ;;
     esac;
 done;