From 6eb6752398901671ae7d7076d8f363196724b991 Mon Sep 17 00:00:00 2001
From: armink <armink.ztl@gmail.com>
Date: Thu, 15 Apr 2021 14:12:02 +0800
Subject: [PATCH] [libc/time] Fix MDK build error when using gmtime_r.

---
 components/libc/compilers/common/sys/time.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/components/libc/compilers/common/sys/time.h b/components/libc/compilers/common/sys/time.h
index 2a40b7b805..b3adaedfab 100644
--- a/components/libc/compilers/common/sys/time.h
+++ b/components/libc/compilers/common/sys/time.h
@@ -57,6 +57,10 @@ time_t timegm(struct tm * const t);
 int gettimeofday(struct timeval *tv, struct timezone *tz);
 int settimeofday(const struct timeval *tv, const struct timezone *tz);
 
+#if defined(__ARMCC_VERSION) || defined (__ICCARM__)
+struct tm *gmtime_r(const time_t *timep, struct tm *r);
+#endif
+
 #ifdef RT_USING_POSIX
 #include <sys/types.h>
 /* posix clock and timer */