if (CMAKE_SIZEOF_VOID_P MATCHES "8")
  SUBDIRS( BulletSoftBody BulletCollision BulletDynamics LinearMath )
else (CMAKE_SIZEOF_VOID_P MATCHES "8")
  SUBDIRS( BulletMultiThreaded BulletSoftBody BulletCollision BulletDynamics LinearMath )
endif (CMAKE_SIZEOF_VOID_P MATCHES "8")