From bf2cc7c45cf5bd765115158a991c7ea7e0c5c4a8 Mon Sep 17 00:00:00 2001
From: Shuduo Sang <sangshuduo@gmail.com>
Date: Wed, 4 Mar 2020 22:12:49 +0800
Subject: [PATCH] fix timezone build issue with msvc on Windows.

---
 src/util/src/ttime.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/util/src/ttime.c b/src/util/src/ttime.c
index 65c5d0ea4c..5d5b580a89 100644
--- a/src/util/src/ttime.c
+++ b/src/util/src/ttime.c
@@ -59,6 +59,10 @@ int64_t user_mktime64(const unsigned int year0, const unsigned int mon0,
   int64_t res = (((((int64_t) (year/4 - year/100 + year/400 + 367*mon/12 + day) +
 		  year*365 - 719499)*24 + hour)*60 + min)*60 + sec);
 
+#if defined(WINDOWS) && _MSC_VER >= 1900
+    // see https://docs.microsoft.com/en-us/cpp/c-runtime-library/daylight-dstbias-timezone-and-tzname?view=vs-2019
+    int64_t timezone = _timezone;
+#endif
 	return (res + timezone);
 }
 // ==== mktime() kernel code =================//
-- 
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