working on GPU build

if(ENABLE_GPU)

    find_package(CUDA REQUIRED)

    find_program(BIN2C bin2c)

    if(NOT BIN2C)

      message(FATAL_ERROR "Couldn't find bin2c")

    endif()

    include_directories(${CUDA_TOOLKIT_INCLUDE})

    set(CUDA_BUILD_CUBIN ON)

    set(GPU_PREC "SINGLE_DOUBLE" CACHE STRING "Lammps gpu precision size")

    set_property(CACHE GPU_PREC PROPERTY STRINGS SINGLE_DOUBLE SINGLE_SINGLE DOUBLE_DOUBLE)

    add_definitions(-D_${GPU_PREC})

    add_definitions(-DNV_KERNEL -DUSE_CUDPP -DUCL_CUDADR -DCMAKE_GPU)

    set(GPU_SOURCES_DIR ${LAMMPS_SOURCE_DIR}/GPU)

    set(GPU_SOURCES ${GPU_SOURCES_DIR}/gpu_extra.h)

    get_property(GPU_SOURCES GLOBAL PROPERTY GPU_SOURCES)

    file(GLOB_RECURSE GPU_LIB_SOURCES ${LAMMPS_LIB_SOURCE_DIR}/gpu/*.cpp

      ${LAMMPS_LIB_SOURCE_DIR}/gpu/*.cu)

    cuda_add_library(lammps_gpu ${GPU_LIB_SOURCES})

    #add_custom_target(cubin_headers)

    #file(GLOB_RECURSE GPU_LIB_CUBIN ${LAMMPS_LIB_SOURCE_DIR}/gpu/*.cubin)

    #file(MAKE_DIRECTORY ${LAMMPS_LIB_BINARY_DIR}/gpu)

    #foreach(CUBIN ${GPU_LIB_CUBIN})

    #  get_filename_component(CUBIN_NAME NAME_WE ${CUBIN})

    #  message("XXX ${CUBIN_NAME}_cubin.h")

    #  add_custom_command(OUTPUT ${LAMMPS_LIB_BINARY_DIR/gpu/${CUBIN_NAME}_cubin.h

    #    COMMAND ${BIN2C} -c -n ${CUBIN_NAME} ${CUBIN} > ${LAMMPS_LIB_BINARY_DIR}/gpu/${CUBIN_NAME}_cubin.h

    #    DEPENDS ${CUBIN}

    #    COMMENT "Generating ${CUBIN_NAME}_cubin.h")

    #  add_custom_target(${CUBIN_NAME}_cubin DEPENDS ${LAMMPS_LIB_BINARY_DIR/gpu/${CUBIN_NAME}_cubin.h)

    #  add_dependencies(cubin_headers ${CUBIN_NAME}_cubin)

    #endforeach()

    #add_dependencies(lammps_gpu cubin_headers)

    list(APPEND LAMMPS_LINK_LIBS lammps_gpu)

    list(APPEND LIB_SOURCES ${GPU_SOURCES})

    include_directories(${GPU_SOURCES_DIR} ${LAMMPS_LIB_SOURCE_DIR}/gpu)

    include_directories(${GPU_SOURCES_DIR} ${LAMMPS_LIB_SOURCE_DIR}/gpu

      ${LAMMPS_LIB_SOURCE_DIR}/gpu/cudpp_mini ${LAMMPS_LIB_BINARY_DIR}/gpu)

endif()

######################################################

//    email                : brownw@ornl.gov

// ***************************************************************************/

#ifdef CMAKE_GPU

#define grdtyp float 

#define grdtyp4 float4

#endif

#ifdef NV_KERNEL

#include "lal_preprocessor.h"