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diff --git a/extern/bullet2/BulletMultiThreaded/SequentialThreadSupport.h b/extern/bullet2/BulletMultiThreaded/SequentialThreadSupport.h
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+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2007 Erwin Coumans  http://bulletphysics.com
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose, 
+including commercial applications, and to alter it and redistribute it freely, 
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "LinearMath/btScalar.h"
+#include "PlatformDefinitions.h"
+
+
+#ifndef SEQUENTIAL_THREAD_SUPPORT_H
+#define SEQUENTIAL_THREAD_SUPPORT_H
+
+#include "LinearMath/btAlignedObjectArray.h"
+
+#include "btThreadSupportInterface.h"
+
+typedef void (*SequentialThreadFunc)(void* userPtr,void* lsMemory);
+typedef void* (*SequentiallsMemorySetupFunc)();
+
+
+
+///The SequentialThreadSupport is a portable non-parallel implementation of the btThreadSupportInterface
+///This is useful for debugging and porting SPU Tasks to other platforms.
+class SequentialThreadSupport : public btThreadSupportInterface 
+{
+public:
+	struct	btSpuStatus
+	{
+		uint32_t	m_taskId;
+		uint32_t	m_commandId;
+		uint32_t	m_status;
+
+		SequentialThreadFunc	m_userThreadFunc;
+
+		void*	m_userPtr; //for taskDesc etc
+		void*	m_lsMemory; //initialized using SequentiallsMemorySetupFunc
+	};
+private:
+	btAlignedObjectArray<btSpuStatus>	m_activeSpuStatus;
+	btAlignedObjectArray<void*>			m_completeHandles;	
+public:
+	struct	SequentialThreadConstructionInfo
+	{
+		SequentialThreadConstructionInfo (char* uniqueName,
+									SequentialThreadFunc userThreadFunc,
+									SequentiallsMemorySetupFunc	lsMemoryFunc
+									)
+									:m_uniqueName(uniqueName),
+									m_userThreadFunc(userThreadFunc),
+									m_lsMemoryFunc(lsMemoryFunc)
+		{
+
+		}
+
+		char*						m_uniqueName;
+		SequentialThreadFunc		m_userThreadFunc;
+		SequentiallsMemorySetupFunc	m_lsMemoryFunc;
+	};
+
+	SequentialThreadSupport(SequentialThreadConstructionInfo& threadConstructionInfo);
+	virtual	~SequentialThreadSupport();
+	void	startThreads(SequentialThreadConstructionInfo&	threadInfo);
+///send messages to SPUs
+	virtual	void sendRequest(uint32_t uiCommand, ppu_address_t uiArgument0, uint32_t uiArgument1);
+///check for messages from SPUs
+	virtual	void waitForResponse(unsigned int *puiArgument0, unsigned int *puiArgument1);
+///start the spus (can be called at the beginning of each frame, to make sure that the right SPU program is loaded)
+	virtual	void startSPU();
+///tell the task scheduler we are done with the SPU tasks
+	virtual	void stopSPU();
+
+	virtual void setNumTasks(int numTasks);
+
+	virtual int getNumTasks() const
+	{
+		return 1;
+	}
+
+};
+
+#endif //SEQUENTIAL_THREAD_SUPPORT_H
+