add the BT_ prefix for all #ifdef guards, to avoid conflicts with developers own header defines.

Fixes Issue 497

//license header
#ifndef BT_RIGIDBODY_H
#define BT_RIGIDBODY_H
class btRigidBody
{
};
#endif //BT_RIGIDBODY_H

src/BulletCollision/BroadphaseCollision/btAxisSweep3.h

@@ -16,8 +16,8 @@
 //
 // 3. This notice may not be removed or altered from any source distribution.
 
-#ifndef AXIS_SWEEP_3_H
-#define AXIS_SWEEP_3_H
+#ifndef BT_AXIS_SWEEP_3_H
+#define BT_AXIS_SWEEP_3_H
 
 #include "LinearMath/btVector3.h"
 #include "btOverlappingPairCache.h"

src/BulletCollision/BroadphaseCollision/btBroadphaseInterface.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef		BROADPHASE_INTERFACE_H
-#define 	BROADPHASE_INTERFACE_H
+#ifndef		BT_BROADPHASE_INTERFACE_H
+#define 	BT_BROADPHASE_INTERFACE_H
 
 
 
@@ -79,4 +79,4 @@ public:
 
 };
 
-#endif //BROADPHASE_INTERFACE_H
+#endif //BT_BROADPHASE_INTERFACE_H

src/BulletCollision/BroadphaseCollision/btBroadphaseProxy.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef BROADPHASE_PROXY_H
-#define BROADPHASE_PROXY_H
+#ifndef BT_BROADPHASE_PROXY_H
+#define BT_BROADPHASE_PROXY_H
 
 #include "LinearMath/btScalar.h" //for SIMD_FORCE_INLINE
 #include "LinearMath/btVector3.h"
@@ -266,5 +266,5 @@ SIMD_FORCE_INLINE bool operator==(const btBroadphasePair& a, const btBroadphaseP
 }
 
 
-#endif //BROADPHASE_PROXY_H
+#endif //BT_BROADPHASE_PROXY_H
 

src/BulletCollision/BroadphaseCollision/btCollisionAlgorithm.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef COLLISION_ALGORITHM_H
-#define COLLISION_ALGORITHM_H
+#ifndef BT_COLLISION_ALGORITHM_H
+#define BT_COLLISION_ALGORITHM_H
 
 #include "LinearMath/btScalar.h"
 #include "LinearMath/btAlignedObjectArray.h"
@@ -77,4 +77,4 @@ public:
 };
 
 
-#endif //COLLISION_ALGORITHM_H
+#endif //BT_COLLISION_ALGORITHM_H

src/BulletCollision/BroadphaseCollision/btDispatcher.h

@@ -13,9 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef _DISPATCHER_H
-#define _DISPATCHER_H
-
+#ifndef BT_DISPATCHER_H
+#define BT_DISPATCHER_H
 #include "LinearMath/btScalar.h"
 
 class btCollisionAlgorithm;
@@ -105,4 +104,4 @@ public:
 };
 
 
-#endif //_DISPATCHER_H
+#endif //BT_DISPATCHER_H

src/BulletCollision/BroadphaseCollision/btOverlappingPairCache.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef OVERLAPPING_PAIR_CACHE_H
-#define OVERLAPPING_PAIR_CACHE_H
+#ifndef BT_OVERLAPPING_PAIR_CACHE_H
+#define BT_OVERLAPPING_PAIR_CACHE_H
 
 
 #include "btBroadphaseInterface.h"
@@ -464,6 +464,6 @@ public:
 };
 
 
-#endif //OVERLAPPING_PAIR_CACHE_H
+#endif //BT_OVERLAPPING_PAIR_CACHE_H
 
 

src/BulletCollision/BroadphaseCollision/btQuantizedBvh.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef QUANTIZED_BVH_H
-#define QUANTIZED_BVH_H
+#ifndef BT_QUANTIZED_BVH_H
+#define BT_QUANTIZED_BVH_H
 
 class btSerializer;
 
@@ -576,4 +576,4 @@ SIMD_FORCE_INLINE	int	btQuantizedBvh::calculateSerializeBufferSizeNew() const
 
 
 
-#endif //QUANTIZED_BVH_H
+#endif //BT_QUANTIZED_BVH_H

src/BulletCollision/BroadphaseCollision/btSimpleBroadphase.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef SIMPLE_BROADPHASE_H
-#define SIMPLE_BROADPHASE_H
+#ifndef BT_SIMPLE_BROADPHASE_H
+#define BT_SIMPLE_BROADPHASE_H
 
 
 #include "btOverlappingPairCache.h"
@@ -167,5 +167,5 @@ public:
 
 
 
-#endif //SIMPLE_BROADPHASE_H
+#endif //BT_SIMPLE_BROADPHASE_H