More general Makefile example

Makefile example

PATH        	:= $(PATH)
LIBRARY_PATH    := $(LIBRARY_PATH)
LD_LIBRARY_PATH := $(LD_LIBRARY_PATH)
LD_RUN_PATH     := $(LD_RUN_PATH)

TESTSRCS    = $(wildcard test*.cpp)
PROJSRCS    = $(wildcard project*.cpp)
SRCS        = $(wildcard *.cpp)
SRCS        = $(filter-out $(TESTSRCS), $(SRCS))
OBJS        = $(SRCS:%.cpp=%.o)
TARGETS     = 
TESTS       =

ZIPFILES    = $(SRCS) Makefile
ZIPFILENAME = submit.tar.gz

CC          = gcc
CCSTD       = -std=c99
CCWFLAGS    = -Wall -Wextra -Wshadow -Wpedantic --pedantic-errors -O2 $(CCSTD)
CCNFLAGS    = -Wno-unused-value -Wno-unused-parameter -Wno-attributes -Wno-unused-variable
CCGDBFLAGS  = -g
CCFLAGS     = $(CCWFLAGS) $(CCNFLAGS) $(CCGDBFLAGS)

CXX         = g++
CXXSTD      = -std=c++17
CXXOPFLAGS  = -Ofast -DNDEBUG \
	      -march=native \
	      -fwhole-program -flto \
	      -fprefetch-loop-arrays \
	      -Wno-coverage-mismatch \
	      -fno-rtti \
	      -fomit-frame-pointer \
	      -falign-functions=16 -falign-loops=16 \
	      -funsafe-loop-optimizations \
	      -ffast-math -fno-stack-protector \
CXXWFLAGS   = -Wall -Wextra -Wshadow -Wpedantic --pedantic-errors
CXXADWFLAGS = -Wduplicated-cond -Wduplicated-branches \
	      -Wlogical-op -Wnull-deference -Wold-style-cast \
	      -Wuseless-cast -Wjump-misses-init \
	      -Wdoule-promotion -Wformat=2
	      # GCC7: -Wrestrict
CXXNFLAGS   = -Wno-unused-value -Wno-unused-parameter -Wno-attributes -Wno-unused-variable
CXXSANFLAGS = -fsanitize=undefined,address,leak,bounds,bool,enum
CXXDBFLAGS  = -g3 -Og -DDEBUG
CXXFLAGS    = $(CXXWFLAGS) $(CXXNFLAGS) $(CXXSTD)

INCLUDES    = 
LDFLAGS     =
LIBS        =

RM          = rm -fv

release: CXXFLAGS += $(CXXOPFLAGS) -fprofile-use
release: clean all

prerelease: CXXFLAGS += -O3 -DNDEBUG
prerelease: all

debug: EXECUTABLE := $(DEBUG)
debug: CXXFLAGS += $(CXXDBFLAGS)
debug: clean all

profile: CXXFLAGS += $(CXXOPFLAGS) -fprofile-generate
profile: clean all

all: $(TARGETS)

$(TARGETS): $(OBJS)
	$(CXX) $(CXXFLAGS) $(INCLUDES) -o $(TARGETS) $(OBJS) $(LDFLAGS) $(LIBS)

$(OBJS) : $(SRCS)
	$(CXX) $(CXXFLAGS) -c $**

.PHONY: all release debug profile clean alltests zip

.SUFFIXES:

zip:
	rm -f $(ZIPFILES)
	dos2unix $(ZIPFILES)
	tar -vcz $(ZIPFILES) -f $(ZIPFILENAME)

clean:
	$(RM) $(OBJS) $(TARGETS) $(TESTS) 

distclean: clean
	$(RM) $(TARGETS)

alltests: clean $(TESTS)

%.o: %.cpp
	$(CXX) $(CXXFLAGS) -c $*.cpp