Pathnames between #include files that are intended to be used within application code should not depend on the paths to the subdirectories being known to the compiler because this will not always be the case when an end-user includes your headers.

Includes of files in the local hierarchy must not use <...> please stick with "..."

src/BulletDynamics/Vehicle/btRaycastVehicle.h

@@ -11,11 +11,11 @@
 #ifndef RAYCASTVEHICLE_H
 #define RAYCASTVEHICLE_H
 
-#include "BulletDynamics/Dynamics/btRigidBody.h"
-#include "BulletDynamics/ConstraintSolver/btTypedConstraint.h"
+#include "../Dynamics/btRigidBody.h"
+#include "../ConstraintSolver/btTypedConstraint.h"
 #include "btVehicleRaycaster.h"
 class btDynamicsWorld;
-#include "LinearMath/btAlignedObjectArray.h"
+#include "../../LinearMath/btAlignedObjectArray.h"
 #include "btWheelInfo.h"
 
 class btVehicleTuning;

src/BulletDynamics/Vehicle/btVehicleRaycaster.h

@@ -11,7 +11,7 @@
 #ifndef VEHICLE_RAYCASTER_H
 #define VEHICLE_RAYCASTER_H
 
-#include "LinearMath/btVector3.h"
+#include "../../LinearMath/btVector3.h"
 
 /// btVehicleRaycaster is provides interface for between vehicle simulation and raycasting
 struct btVehicleRaycaster

src/BulletDynamics/Vehicle/btWheelInfo.h

@@ -11,8 +11,8 @@
 #ifndef WHEEL_INFO_H
 #define WHEEL_INFO_H
 
-#include "LinearMath/btVector3.h"
-#include "LinearMath/btTransform.h"
+#include "../../LinearMath/btVector3.h"
+#include "../../LinearMath/btTransform.h"
 
 class btRigidBody;