From 9c08c53e81412cb7311442fbaf84bed4ad38357f Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@midokura.com>
Date: Mon, 9 Nov 2020 20:04:00 +0900
Subject: [PATCH] libs/libc/time/lib_strftime.c: Fix a printf format warning

---
 libs/libc/time/lib_strftime.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libs/libc/time/lib_strftime.c b/libs/libc/time/lib_strftime.c
index eba947d915..c68d72fbc9 100644
--- a/libs/libc/time/lib_strftime.c
+++ b/libs/libc/time/lib_strftime.c
@@ -397,8 +397,8 @@ size_t strftime(FAR char *s, size_t max, FAR const char *format,
 
            case 's':
              {
-               len = snprintf(dest, chleft, "%d",
-                              mktime((FAR struct tm *)tm));
+               len = snprintf(dest, chleft, "%ju",
+                              (uintmax_t)mktime((FAR struct tm *)tm));
              }
              break;