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Tue, Dec 31, 00:25

Makefile
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PROGRAM_NAME := GradienBenchmark
program_CXX_SRCS := $(wildcard *.cpp)
#program_CXX_SRCS += $(wildcard ../../*.cpp) #Find C++ source files from additonal directories
program_CXX_OBJS := ${program_CXX_SRCS:.cpp=.o}
program_C_SRCS := $(wildcard *.c)
#program_CXX_SRCS += $(wildcard ../../*.c) #Find C source files from additonal directories
program_C_OBJS := ${program_C_SRCS:.c=.o}
program_CU_SRCS := $(wildcard *.cu)
#program_CU_SRCS += $(wildcard ../../*.cu) #Find CUDA source files from additional directories
#program_CU_HEADERS := $(wildcard *.cuh) #Optional: Include .cuh files as dependencies
#program_CU_HEADERS += $(wildcard ../../*.cuh) #Find .cuh files from additional directories
program_CU_OBJS := ${program_CU_SRCS:.cu=.cuo}
program_INCLUDE_DIRS := . /usr/local/cuda/include/ #C++ Include directories
program_INCLUDE_DIRS += /usr/include/cfitsio/
#program_CU_INCLUDE_DIRS := /home/users/amclaugh/CUB/cub-1.3.2/ #CUDA Include directories
program_INCLUDE_LIBS := /usr/lib64/ #Include libraries
# Compiler flags
CPPFLAGS += $(foreach includedir,$(program_INCLUDE_DIRS),-I$(includedir))
CPPFLAGS += $(foreach includelib,$(program_INCLUDE_LIBS),-L$(includelib) -lcfitsio)
CXXFLAGS += -g -O3 -std=c++0x -Wall -pedantic
GEN_SM35 := -gencode=arch=compute_35,code=\"sm_35,compute_35\" #Target CC 3.5, for example
NVFLAGS := -O3 -g -G -rdc=true #rdc=true needed for separable compilation
#NVFLAGS += $(GEN_SM35)
NVFLAGS += $(foreach includedir,$(program_CU_INCLUDE_DIRS),-I$(includedir))
CUO_O_OBJECTS := ${program_CU_OBJS:.cuo=.cuo.o}
OBJECTS = $(program_CU_OBJS) $(program_CXX_OBJS) $(program_C_OBJS)
.PHONY: all clean distclean
all: $(PROGRAM_NAME)
debug: CXXFLAGS = -g -O0 -std=c++0x -Wall -pedantic -DDEBUG $(EXTRA_FLAGS)
debug: NVFLAGS = -O0 $(GEN_SM35) -g -G
debug: NVFLAGS += $(foreach includedir,$(program_CU_INCLUDE_DIRS),-I$(includedir))
debug: $(PROGRAM_NAME)
# Rule for compilation of CUDA source (C++ source can be handled automatically)
%.cuo: %.cu %.cuh
nvcc $(NVFLAGS) $(CPPFLAGS) -o $@ -dc $<
# This is pretty ugly...details below
# The program depends on both C++ and CUDA Objects, but storing CUDA objects as .o files results in circular dependency
# warnings from Make. However, nvcc requires that object files for linking end in the .o extension, else it will throw
# an error saying that it doesn't know how to handle the file. Using a non .o rule for Make and then renaming the file
# to have the .o extension for nvcc won't suffice because the program will depend on the non .o file but the files in
# the directory after compilation will have a .o suffix. Thus, when one goes to recompile the code all files will be
# recompiled instead of just the ones that have been updated.
#
# The solution below solves these issues by silently converting the non .o suffix needed by make to the .o suffix
# required by nvcc, calling nvcc, and then converting back to the non .o suffix for future, dependency-based
# compilation.
$(PROGRAM_NAME): $(OBJECTS)
@ for cu_obj in $(program_CU_OBJS); \
do \
mv $$cu_obj $$cu_obj.o; \
done #append a .o suffix for nvcc
nvcc $(NVFLAGS) $(CPPFLAGS) -o $@ $(program_CXX_OBJS) $(program_C_OBJS) $(CUO_O_OBJECTS)
@ for cu_obj in $(CUO_O_OBJECTS); \
do \
mv $$cu_obj $${cu_obj%.*}; \
done #remove the .o for make
clean:
@- $(RM) $(PROGRAM_NAME) $(OBJECTS) *~
distclean: clean

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