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/BulletDynamics/ConstraintSolver/btConeTwistConstraint.h

@@ -33,8 +33,8 @@ and swing 1 and 2 are along the z and y axes respectively.
 
 
 
-#ifndef CONETWISTCONSTRAINT_H
-#define CONETWISTCONSTRAINT_H
+#ifndef BT_CONETWISTCONSTRAINT_H
+#define BT_CONETWISTCONSTRAINT_H
 
 #include "LinearMath/btVector3.h"
 #include "btJacobianEntry.h"
@@ -343,4 +343,4 @@ SIMD_FORCE_INLINE const char*	btConeTwistConstraint::serialize(void* dataBuffer,
 }
 
 
-#endif //CONETWISTCONSTRAINT_H
+#endif //BT_CONETWISTCONSTRAINT_H

src/BulletDynamics/ConstraintSolver/btConstraintSolver.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef CONSTRAINT_SOLVER_H
-#define CONSTRAINT_SOLVER_H
+#ifndef BT_CONSTRAINT_SOLVER_H
+#define BT_CONSTRAINT_SOLVER_H
 
 #include "LinearMath/btScalar.h"
 
@@ -49,4 +49,4 @@ public:
 
 
 
-#endif //CONSTRAINT_SOLVER_H
+#endif //BT_CONSTRAINT_SOLVER_H

src/BulletDynamics/ConstraintSolver/btContactConstraint.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef CONTACT_CONSTRAINT_H
-#define CONTACT_CONSTRAINT_H
+#ifndef BT_CONTACT_CONSTRAINT_H
+#define BT_CONTACT_CONSTRAINT_H
 
 #include "LinearMath/btVector3.h"
 #include "btJacobianEntry.h"
@@ -65,4 +65,4 @@ void resolveSingleBilateral(btRigidBody& body1, const btVector3& pos1,
 
 
 
-#endif //CONTACT_CONSTRAINT_H
+#endif //BT_CONTACT_CONSTRAINT_H

src/BulletDynamics/ConstraintSolver/btContactSolverInfo.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef CONTACT_SOLVER_INFO
-#define CONTACT_SOLVER_INFO
+#ifndef BT_CONTACT_SOLVER_INFO
+#define BT_CONTACT_SOLVER_INFO
 
 enum	btSolverMode
 {
@@ -84,4 +84,4 @@ struct btContactSolverInfo : public btContactSolverInfoData
 	}
 };
 
-#endif //CONTACT_SOLVER_INFO
+#endif //BT_CONTACT_SOLVER_INFO

src/BulletDynamics/ConstraintSolver/btGeneric6DofConstraint.h

@@ -24,8 +24,8 @@ http://gimpact.sf.net
 */
 
 
-#ifndef GENERIC_6DOF_CONSTRAINT_H
-#define GENERIC_6DOF_CONSTRAINT_H
+#ifndef BT_GENERIC_6DOF_CONSTRAINT_H
+#define BT_GENERIC_6DOF_CONSTRAINT_H
 
 #include "LinearMath/btVector3.h"
 #include "btJacobianEntry.h"
@@ -611,4 +611,4 @@ SIMD_FORCE_INLINE	const char*	btGeneric6DofConstraint::serialize(void* dataBuffe
 
 
 
-#endif //GENERIC_6DOF_CONSTRAINT_H
+#endif //BT_GENERIC_6DOF_CONSTRAINT_H

src/BulletDynamics/ConstraintSolver/btGeneric6DofSpringConstraint.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef GENERIC_6DOF_SPRING_CONSTRAINT_H
-#define GENERIC_6DOF_SPRING_CONSTRAINT_H
+#ifndef BT_GENERIC_6DOF_SPRING_CONSTRAINT_H
+#define BT_GENERIC_6DOF_SPRING_CONSTRAINT_H
 
 
 #include "LinearMath/btVector3.h"
@@ -93,5 +93,5 @@ SIMD_FORCE_INLINE	const char*	btGeneric6DofSpringConstraint::serialize(void* dat
 	return "btGeneric6DofConstraintData";
 }
 
-#endif // GENERIC_6DOF_SPRING_CONSTRAINT_H
+#endif // BT_GENERIC_6DOF_SPRING_CONSTRAINT_H
 

src/BulletDynamics/ConstraintSolver/btHinge2Constraint.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef HINGE2_CONSTRAINT_H
-#define HINGE2_CONSTRAINT_H
+#ifndef BT_HINGE2_CONSTRAINT_H
+#define BT_HINGE2_CONSTRAINT_H
 
 
 
@@ -54,5 +54,5 @@ public:
 
 
 
-#endif // HINGE2_CONSTRAINT_H
+#endif // BT_HINGE2_CONSTRAINT_H
 

src/BulletDynamics/ConstraintSolver/btHingeConstraint.h

@@ -15,8 +15,9 @@ subject to the following restrictions:
 
 /* Hinge Constraint by Dirk Gregorius. Limits added by Marcus Hennix at Starbreeze Studios */
 
-#ifndef HINGECONSTRAINT_H
-#define HINGECONSTRAINT_H
+#ifndef BT_HINGECONSTRAINT_H
+#define BT_HINGECONSTRAINT_H
+
 #define _BT_USE_CENTER_LIMIT_ 1
 
 
@@ -377,4 +378,4 @@ SIMD_FORCE_INLINE	const char*	btHingeConstraint::serialize(void* dataBuffer, btS
 	return btHingeConstraintDataName;
 }
 
-#endif //HINGECONSTRAINT_H
+#endif //BT_HINGECONSTRAINT_H

src/BulletDynamics/ConstraintSolver/btJacobianEntry.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef JACOBIAN_ENTRY_H
-#define JACOBIAN_ENTRY_H
+#ifndef BT_JACOBIAN_ENTRY_H
+#define BT_JACOBIAN_ENTRY_H
 
 #include "LinearMath/btVector3.h"
 #include "BulletDynamics/Dynamics/btRigidBody.h"
@@ -153,4 +153,4 @@ public:
 
 };
 
-#endif //JACOBIAN_ENTRY_H
+#endif //BT_JACOBIAN_ENTRY_H

src/BulletDynamics/ConstraintSolver/btPoint2PointConstraint.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef POINT2POINTCONSTRAINT_H
-#define POINT2POINTCONSTRAINT_H
+#ifndef BT_POINT2POINTCONSTRAINT_H
+#define BT_POINT2POINTCONSTRAINT_H
 
 #include "LinearMath/btVector3.h"
 #include "btJacobianEntry.h"
@@ -158,4 +158,4 @@ SIMD_FORCE_INLINE	const char*	btPoint2PointConstraint::serialize(void* dataBuffe
 	return btPoint2PointConstraintDataName;
 }
 
-#endif //POINT2POINTCONSTRAINT_H
+#endif //BT_POINT2POINTCONSTRAINT_H

src/BulletDynamics/ConstraintSolver/btSequentialImpulseConstraintSolver.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef SEQUENTIAL_IMPULSE_CONSTRAINT_SOLVER_H
-#define SEQUENTIAL_IMPULSE_CONSTRAINT_SOLVER_H
+#ifndef BT_SEQUENTIAL_IMPULSE_CONSTRAINT_SOLVER_H
+#define BT_SEQUENTIAL_IMPULSE_CONSTRAINT_SOLVER_H
 
 #include "btConstraintSolver.h"
 class btIDebugDraw;
@@ -124,5 +124,5 @@ typedef btSequentialImpulseConstraintSolver btSequentialImpulseConstraintSolverP
 #endif
 
 
-#endif //SEQUENTIAL_IMPULSE_CONSTRAINT_SOLVER_H
+#endif //BT_SEQUENTIAL_IMPULSE_CONSTRAINT_SOLVER_H
 

src/BulletDynamics/ConstraintSolver/btSliderConstraint.h

@@ -22,8 +22,8 @@ TODO:
  - add conversion for ODE constraint solver
 */
 
-#ifndef SLIDER_CONSTRAINT_H
-#define SLIDER_CONSTRAINT_H
+#ifndef BT_SLIDER_CONSTRAINT_H
+#define BT_SLIDER_CONSTRAINT_H
 
 
 
@@ -329,5 +329,5 @@ SIMD_FORCE_INLINE	const char*	btSliderConstraint::serialize(void* dataBuffer, bt
 
 
 
-#endif //SLIDER_CONSTRAINT_H
+#endif //BT_SLIDER_CONSTRAINT_H
 

src/BulletDynamics/ConstraintSolver/btSolve2LinearConstraint.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef SOLVE_2LINEAR_CONSTRAINT_H
-#define SOLVE_2LINEAR_CONSTRAINT_H
+#ifndef BT_SOLVE_2LINEAR_CONSTRAINT_H
+#define BT_SOLVE_2LINEAR_CONSTRAINT_H
 
 #include "LinearMath/btMatrix3x3.h"
 #include "LinearMath/btVector3.h"
@@ -104,4 +104,4 @@ public:
 
 };
 
-#endif //SOLVE_2LINEAR_CONSTRAINT_H
+#endif //BT_SOLVE_2LINEAR_CONSTRAINT_H

src/BulletDynamics/ConstraintSolver/btTypedConstraint.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef TYPED_CONSTRAINT_H
-#define TYPED_CONSTRAINT_H
+#ifndef BT_TYPED_CONSTRAINT_H
+#define BT_TYPED_CONSTRAINT_H
 
 class btRigidBody;
 #include "LinearMath/btScalar.h"
@@ -407,4 +407,4 @@ public:
 
 
 
-#endif //TYPED_CONSTRAINT_H
+#endif //BT_TYPED_CONSTRAINT_H

src/BulletDynamics/ConstraintSolver/btUniversalConstraint.h

@@ -13,8 +13,8 @@ subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef UNIVERSAL_CONSTRAINT_H
-#define UNIVERSAL_CONSTRAINT_H
+#ifndef BT_UNIVERSAL_CONSTRAINT_H
+#define BT_UNIVERSAL_CONSTRAINT_H
 
 
 
@@ -58,5 +58,5 @@ public:
 
 
 
-#endif // UNIVERSAL_CONSTRAINT_H
+#endif // BT_UNIVERSAL_CONSTRAINT_H