From 372bb8b22546663ba57e69fad75c97cfd004ac63 Mon Sep 17 00:00:00 2001
From: Vivien HENRIET <bubuabu@bubuabu.org>
Date: Wed, 30 Jan 2019 23:44:51 +0100
Subject: [PATCH 66/72] Fix os.date() for timezone change awareness

On POSIX target, system timezone change are not taken into account.
To reproduce,
1. call os.date()
2. change your timezone
3. call os.date() within the same luajit instance

On POSIX target, os.date use localtime_r to retrieve time.
On other target, the function localtime is used. But there is a behaviour
diference between these two function. localtime acts as if it called tzset
which localtime_r don't.

To fix the issue tzset is called before localtime_r.
---
 src/lib_os.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lib_os.c b/src/lib_os.c
index ffbc3fd..09dc737 100644
--- a/src/lib_os.c
+++ b/src/lib_os.c
@@ -185,6 +185,7 @@ LJLIB_CF(os_date)
 #endif
   } else {
 #if LJ_TARGET_POSIX
+    tzset();
     stm = localtime_r(&t, &rtm);
 #else
     stm = localtime(&t);
-- 
2.20.1