From 6dd3d2d560c23046ef17b440ef089c1304d32083 Mon Sep 17 00:00:00 2001
From: "Earle F. Philhower, III" <earlephilhower@yahoo.com>
Date: Fri, 15 Nov 2019 17:12:30 -0800
Subject: [PATCH] Update SdFat to not undefine F() macro

Fixes #6767 .  Remove the `undef F` from SysCall.h as it is not needed
nor used in the SD or SDFS libraries.  This puts F() strings back in
flash when using the SD/SDFS libs.
---
 libraries/ESP8266SdFat | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/ESP8266SdFat b/libraries/ESP8266SdFat
index af4ed0c5ec..b240d2231a 160000
--- a/libraries/ESP8266SdFat
+++ b/libraries/ESP8266SdFat
@@ -1 +1 @@
-Subproject commit af4ed0c5ec3084cb3883df51ec2052791ca2bff2
+Subproject commit b240d2231a117bbd89b79902eb54cae948ee2f42