From 51c91e52e514c6f263f46cd608c38693e3ad2035 Mon Sep 17 00:00:00 2001
From: christos <christos@NetBSD.org>
Date: Sat, 24 Nov 2018 13:10:20 +0000
Subject: [PATCH] add warn_unused_result.

---
 usr.bin/xlint/lint1/cgram.y | 6 ++++--
 usr.bin/xlint/lint1/scan.l  | 5 +++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/usr.bin/xlint/lint1/cgram.y b/usr.bin/xlint/lint1/cgram.y
index 1802da9f6a35..1bdd9bf9c867 100644
--- a/usr.bin/xlint/lint1/cgram.y
+++ b/usr.bin/xlint/lint1/cgram.y
@@ -1,5 +1,5 @@
 %{
-/* $NetBSD: cgram.y,v 1.98 2018/09/03 15:16:33 christos Exp $ */
+/* $NetBSD: cgram.y,v 1.99 2018/11/24 13:10:20 christos Exp $ */
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
@@ -35,7 +35,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: cgram.y,v 1.98 2018/09/03 15:16:33 christos Exp $");
+__RCSID("$NetBSD: cgram.y,v 1.99 2018/11/24 13:10:20 christos Exp $");
 #endif
 
 #include <stdlib.h>
@@ -234,6 +234,7 @@ anonymize(sym_t *s)
 %token <y_type>		T_AT_UNUSED
 %token <y_type>		T_AT_USED
 %token <y_type>		T_AT_VISIBILITY
+%token <y_type>		T_AT_WARN_UNUSED_RESULT
 %token <y_type>		T_AT_WEAK
 
 %left	T_COMMA
@@ -561,6 +562,7 @@ type_attribute_spec:
 	| T_AT_UNUSED {
 		addused();
 	}
+	| T_AT_WARN_UNUSED_RESULT
 	| T_AT_WEAK
 	| T_AT_VISIBILITY T_LPARN constant T_RPARN
 	| T_QUAL {
diff --git a/usr.bin/xlint/lint1/scan.l b/usr.bin/xlint/lint1/scan.l
index e3e2776b694b..138e2d3eefa9 100644
--- a/usr.bin/xlint/lint1/scan.l
+++ b/usr.bin/xlint/lint1/scan.l
@@ -1,5 +1,5 @@
 %{
-/* $NetBSD: scan.l,v 1.84 2018/10/07 14:20:01 christos Exp $ */
+/* $NetBSD: scan.l,v 1.85 2018/11/24 13:10:20 christos Exp $ */
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
@@ -35,7 +35,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: scan.l,v 1.84 2018/10/07 14:20:01 christos Exp $");
+__RCSID("$NetBSD: scan.l,v 1.85 2018/11/24 13:10:20 christos Exp $");
 #endif
 
 #include <stdlib.h>
@@ -291,6 +291,7 @@ static	struct	kwtab {
 	{ "visibility", T_AT_VISIBILITY,0,	0,	0,	  0,0,1,1,5 },
 	{ "void",	T_TYPE,		0,	VOID,	0,	  0,0,0,0,1 },
 	{ "volatile",	T_QUAL,		0,	0,	VOLATILE, 1,0,0,0,7 },
+	{ "warn_unused_result", T_AT_WARN_UNUSED_RESULT, 0, 0, 0, 0,0,1,1,5 },
 	{ "weak",	T_AT_WEAK,	0,	0,	0,	  0,0,1,1,5 },
 	{ "while",	T_WHILE,	0,	0,	0,	  0,0,0,0,1 },
 	{ NULL,		0,		0,	0,	0,	  0,0,0,0,0 }