From 507454a6d8ae9068396b41c1d7a0b4dec18bd64f Mon Sep 17 00:00:00 2001
From: Matthew Flatt <mflatt@racket-lang.org>
Date: Fri, 30 Oct 2020 06:55:33 -0600
Subject: [PATCH] rktio: use `tm_gmtoff` instead of `timezone` on Linux

Closes #3474

Xsmith discovered that Chez Scheme's use of `tm_gmtoff` is better
thank rktio's use of `timezone`.
---
 racket/src/rktio/rktio_platform.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/racket/src/rktio/rktio_platform.h b/racket/src/rktio/rktio_platform.h
index 1cbc4b95f8..52538a9bb5 100644
--- a/racket/src/rktio/rktio_platform.h
+++ b/racket/src/rktio/rktio_platform.h
@@ -43,7 +43,7 @@
 
 #if defined(__linux__)
 
-# define USE_TIMEZONE_VAR_W_DLS
+# define USE_TM_GMTOFF_FIELD
 # define USE_TZNAME_VAR
 
 # define RKTIO_TCP_LISTEN_IPV6_ONLY_SOCKOPT