From 7dc14634cd100fbf50e86237ea8dd42c69cc2721 Mon Sep 17 00:00:00 2001
From: "Zheng, Lei" <realthunder.dev@gmail.com>
Date: Tue, 29 Nov 2022 18:26:58 +0800
Subject: [PATCH] Base: fix Windows build issue

---
 src/Base/Observer.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Base/Observer.h b/src/Base/Observer.h
index 054106475c..00de45e81e 100644
--- a/src/Base/Observer.h
+++ b/src/Base/Observer.h
@@ -216,6 +216,15 @@ protected:
   std::set<Observer <_MessageType> *> _ObserverSet;
 };
 
+#if defined (FC_OS_WIN32) || defined(FC_OS_CYGWIN)
+#   ifdef FCBase
+template class BaseExport Observer<const char*>;
+template class BaseExport Subject<const char*>;
+#   else
+extern template class BaseExport Observer<const char*>;
+extern template class BaseExport Subject<const char*>;
+#   endif
+#endif
 
 } //namespace Base