Add _X_NORETURN attributes suggested by gcc

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/iceauth.c b/iceauth.c
index 8730a82..b33cb38 100644
--- a/iceauth.c
+++ b/iceauth.c
@@ -52,7 +52,8 @@ static const char *defsource = "(stdin)";
 /*
  * utility routines
  */
-static void usage (void)
+static void _X_NORETURN
+usage (void)
 {
     static const char prefixmsg[] = 
 "\n"