linux-user: Treat --foo options the same as -foo

The system mode binaries provide a similar alias
and it makes common options like --version and --help
work as expected.

Signed-off-by: Meador Inge <meadori@codesourcery.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>

diff --git a/linux-user/main.c b/linux-user/main.c
index c7c39d4d5c4ab2a0c895cd89b22a10870219803b..6599a4140484134f880cbf74bfccc74664af9a34 100644 (file)
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -4024,6 +4024,10 @@ static int parse_args(int argc, char **argv)
         if (!strcmp(r, "-")) {
             break;
         }
+        /* Treat --foo the same as -foo.  */
+        if (r[0] == '-') {
+            r++;
+        }
 
         for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
             if (!strcmp(r, arginfo->argv)) {