From b2a5f535d75b37cfbf8839da198ec360c5e78c9f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Wed, 14 Nov 2012 14:48:11 +0100
Subject: [PATCH] ResourceManager: allow users to instantiate
 internalInstance() only once.

It is cumbersome, but otherwise the linking (on mingw) fails with
multiple definition errors.
---
 src/ResourceManager.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ResourceManager.h b/src/ResourceManager.h
index 3935815ea..f603a8616 100644
--- a/src/ResourceManager.h
+++ b/src/ResourceManager.h
@@ -567,10 +567,12 @@ template<class... Types> class ResourceManager: protected Implementation::Resour
         static ResourceManager<Types...>*& internalInstance();
 };
 
+#ifndef MAGNUM_RESOURCEMANAGER_DONT_DEFINE_INTERNALINSTANCE
 template<class ...Types> ResourceManager<Types...>*& ResourceManager<Types...>::internalInstance() {
     static ResourceManager<Types...>* _instance(nullptr);
     return _instance;
 }
+#endif
 
 /** @debugoperator{Magnum::ResourceKey} */
 template<class T> inline Corrade::Utility::Debug operator<<(Corrade::Utility::Debug debug, const ResourceKey& value) {