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	CPU_ARCH = -m32
	CPU_ARCH_SUFFIX = i386
else
	CPU_ARCH = -m64
	CPU_ARCH_SUFFIX = x86_64
    NPPI = -lnppi
endif


# [abi=<0|1>] CUDA ABI option (enabled by default) 
ifneq ($(abi), 0)
	ABI_SUFFIX = abi
else 
	NVCCFLAGS += -Xptxas -abi=no
	ABI_SUFFIX = noabi
endif


# [open64=<0|1>] Middle-end compiler option (nvvm by default)
ifeq ($(open64), 1)
	NVCCFLAGS += -open64
	PTX_SUFFIX = open64
else 
	PTX_SUFFIX = nvvm
endif


# [verbose=<0|1>] Verbose toolchain output from nvcc option
ifeq ($(verbose), 1)
	NVCCFLAGS += -v
endif


# [keep=<0|1>] Keep intermediate compilation artifacts option
ifeq ($(keep), 1)
	NVCCFLAGS += -keep
endif

# [debug=<0|1>] Generate debug mode code
ifeq ($(debug), 1)
	NVCCFLAGS += -G
endif


#-------------------------------------------------------------------------------
# Compiler and compilation platform
#-------------------------------------------------------------------------------

CUB_DIR = $(dir $(lastword $(MAKEFILE_LIST)))

NVCC = "$(shell which nvcc)"
ifdef nvccver
    NVCC_VERSION = $(nvccver)
else
    NVCC_VERSION = $(strip $(shell nvcc --version | grep release | sed 's/.*release //' |  sed 's/,.*//'))
endif

# detect OS
OSUPPER = $(shell uname -s 2>/dev/null | tr [:lower:] [:upper:])

# Default flags: verbose kernel properties (regs, smem, cmem, etc.); runtimes for compilation phases 
NVCCFLAGS += $(SM_DEF) -Xptxas -v -Xcudafe -\# 

ifeq (WIN_NT, $(findstring WIN_NT, $(OSUPPER)))
    # For MSVC
    # Enable more warnings and treat as errors
    NVCCFLAGS += -Xcompiler /W3 -Xcompiler /WX
    # Disable excess x86 floating point precision that can lead to results being labeled incorrectly
    NVCCFLAGS += -Xcompiler /fp:strict
    # Help the compiler/linker work with huge numbers of kernels on Windows
	NVCCFLAGS += -Xcompiler /bigobj -Xcompiler /Zm500
	CC = cl
	
	# Multithreaded runtime
	NVCCFLAGS += -Xcompiler /MT
	
ifneq ($(force32), 1)
	CUDART_CYG = "$(shell dirname $(NVCC))/../lib/Win32/cudart.lib"
else
	CUDART_CYG = "$(shell dirname $(NVCC))/../lib/x64/cudart.lib"
endif
	CUDART = "$(shell cygpath -w $(CUDART_CYG))"
else
    # For g++
    # Disable excess x86 floating point precision that can lead to results being labeled incorrectly
    NVCCFLAGS += -Xcompiler -ffloat-store
    CC = g++
ifneq ($(force32), 1)
    CUDART = "$(shell dirname $(NVCC))/../lib/libcudart_static.a"
else
    CUDART = "$(shell dirname $(NVCC))/../lib64/libcudart_static.a"
endif
endif

# Suffix to append to each binary
BIN_SUFFIX = sm$(SM_ARCH)_$(PTX_SUFFIX)_$(NVCC_VERSION)_$(ABI_SUFFIX)_$(CDP_SUFFIX)_$(CPU_ARCH_SUFFIX)


#-------------------------------------------------------------------------------
# Dependency Lists
#-------------------------------------------------------------------------------

rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(subst *,%,$2),$d))

CUB_DEPS = 	$(call rwildcard, $(CUB_DIR),*.cuh) \
			$(CUB_DIR)common.mk