add manual treatment of source dependencies between USER-REAXC and USER-OMP

    get_property(USER-OMP_SOURCES GLOBAL PROPERTY OMP_SOURCES)

    # manually add classes, that are not styles

    # manually add package dependent source files from USER-OMP that do not provide styles

    if(PKG_RIGID)

      list(APPEND USER-OMP_SOURCES ${USER-OMP_SOURCES_DIR}/fix_rigid_nh_omp.cpp)

    endif()

    if(PKG_USER-REAXC)

      list(APPEND USER-OMP_SOURCES ${USER-OMP_SOURCES_DIR}/reaxc_bond_orders_omp.cpp

                                   ${USER-OMP_SOURCES_DIR}/reaxc_hydrogen_bonds_omp.cpp

                                   ${USER-OMP_SOURCES_DIR}/reaxc_nonbonded_omp.cpp

                                   ${USER-OMP_SOURCES_DIR}/reaxc_bonds_omp.cpp

                                   ${USER-OMP_SOURCES_DIR}/reaxc_init_md_omp.cpp

                                   ${USER-OMP_SOURCES_DIR}/reaxc_torsion_angles_omp.cpp

                                   ${USER-OMP_SOURCES_DIR}/reaxc_forces_omp.cpp

                                   ${USER-OMP_SOURCES_DIR}/reaxc_multi_body_omp.cpp

                                   ${USER-OMP_SOURCES_DIR}/reaxc_valence_angles_omp.cpp)

    endif()

    list(APPEND LIB_SOURCES ${USER-OMP_SOURCES})

    include_directories(${USER-OMP_SOURCES_DIR})

endif()