* adding pthread main proram to cmake config

bh_tree_mpi/CMakeLists.txt

@@ -12,6 +12,10 @@ add_subdirectory(simulation)
 add_executable(bh_tree_mpi mpimain.cpp)
 target_link_libraries(bh_tree_mpi datastructures simulation ${MPI_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
 
+add_executable(bh_tree_pthread pthreadmain.cpp)
+target_link_libraries(bh_tree_pthread datastructures simulation ${CMAKE_THREAD_LIBS_INIT})
+
+
 if(MPI_COMPILE_FLAGS)
   set_target_properties(bh_tree_mpi PROPERTIES
     COMPILE_FLAGS "${MPI_COMPILE_FLAGS}")