From bbd81c7ee934fbb01f2e23ff9baeb7306deab8a2 Mon Sep 17 00:00:00 2001
From: Emil Muratov <gpm@hotplug.ru>
Date: Tue, 8 Aug 2023 16:10:15 +0900
Subject: [PATCH] add 'NO_GLOBAL_UPDATE' define to avoid creating global
 UpdateClass instance

Save 180 bytes of ram if UpdateClass instance is not required
---
 libraries/Update/src/Update.h    | 2 ++
 libraries/Update/src/Updater.cpp | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/libraries/Update/src/Update.h b/libraries/Update/src/Update.h
index 0969f248666..d34efe73196 100644
--- a/libraries/Update/src/Update.h
+++ b/libraries/Update/src/Update.h
@@ -190,6 +190,8 @@ class UpdateClass {
     uint8_t _ledOn;
 };
 
+#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_UPDATE)
 extern UpdateClass Update;
+#endif
 
 #endif
diff --git a/libraries/Update/src/Updater.cpp b/libraries/Update/src/Updater.cpp
index 30d88cb8ff1..c461e7377e7 100644
--- a/libraries/Update/src/Updater.cpp
+++ b/libraries/Update/src/Updater.cpp
@@ -414,4 +414,6 @@ bool UpdateClass::_chkDataInBlock(const uint8_t *data, size_t len) const {
     return false;
 }
 
+#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_UPDATE)
 UpdateClass Update;
+#endif