Replaced gpu Makefile with the one from upstream so as not to delete it.

# /* ----------------------------------------------------------------------   

#  Generic Linux Makefile for CUDA 

#     - Change CUDA_ARCH for your GPU

# ------------------------------------------------------------------------- */

# which file will be copied to Makefile.lammps

EXTRAMAKE = Makefile.lammps.standard

ifeq ($(CUDA_HOME),)

CUDA_HOME = /usr/local/cuda

endif

NVCC = nvcc

# older CUDA

#CUDA_ARCH = -arch=sm_21

# newer CUDA

#CUDA_ARCH = -arch=sm_13

# older CUDA

#CUDA_ARCH = -arch=sm_10 -DCUDA_PRE_THREE

CUDA_ARCH = -arch=sm_35

# this setting should match LAMMPS Makefile

# one of LAMMPS_SMALLBIG (default), LAMMPS_BIGBIG and LAMMPS_SMALLSMALL

LMP_INC = -DLAMMPS_SMALLBIG

# precision for GPU calculations

# -D_SINGLE_SINGLE  # Single precision for all calculations

# -D_DOUBLE_DOUBLE  # Double precision for all calculations

# -D_SINGLE_DOUBLE  # Accumulation of forces, etc. in double

CUDA_PRECISION = -D_SINGLE_DOUBLE

CUDA_INCLUDE = -I$(CUDA_HOME)/include

CUDA_LIB = -L$(CUDA_HOME)/lib64

CUDA_OPTS = -DUNIX -O3 -Xptxas -v --use_fast_math $(LMP_INC) -Xcompiler -fPIC

CUDR_CPP = mpicxx -DMPI_GERYON -DUCL_NO_EXIT -DMPICH_IGNORE_CXX_SEEK -DOMPI_SKIP_MPICXX=1 -fPIC

CUDR_OPTS = -O2 $(LMP_INC) # -xHost -no-prec-div -ansi-alias

BIN_DIR = ./

OBJ_DIR = ./

LIB_DIR = ./

AR = ar

BSH = /bin/sh

CUDPP_OPT = -DUSE_CUDPP -Icudpp_mini

include Nvidia.makefile