Makefile

# CC=clang
CXX=clang++
RM=rm -f

WARNINGS=-Wall -Wextra -Wpedantic
DEBUG=-g -O1

override CXXFLAGS += $(WARNINGS) $(DEBUG) -std=c++2a -I./src/ -I./includes/
override LDFLAGS += $(DEBUG)
LDLIBS=

ifdef FUZZ
override CXXFLAGS += -g -O1 -fsanitize=fuzzer,address -fprofile-instr-generate -fcoverage-mapping
override LDFLAGS += -fsanitize=fuzzer,address
endif

ifdef COVERAGE
override CXXFLAGS += -g -fprofile-instr-generate -fcoverage-mapping
endif

ifdef RELEASE
override CXXFLAGS += -O3
endif

ifdef TRACE
override CXXFLAGS += -DTRACE
endif

SRCS_LIB:=$(filter-out src/main.cpp,$(shell find src -type f -name '*.cpp'))
OBJS_LIB:=$(patsubst %.cpp,%.o,$(SRCS_LIB))

SRCS_APP:=src/main.cpp
OBJS_APP:=$(patsubst %.cpp,%.o,$(SRCS_APP))

SRCS_TEST:=$(shell find test -type f -name '*.cpp')
OBJS_TEST:=$(pathsubst %cpp,%.o,$(SRCS_TEST))

SRCS_ALL:=$(SRCS_LIB) $(SRCS_APP) $(SRCS_TEST)
OBJS_ALL:=$(OBJS_LIB) $(OBJS_APP) $(OBJS_TEST)

# default target
all: jsonquery

# LIBRARY
lib.a: $(OBJS_LIB)
	ar crvs $@ $^

# EXECUTABLE
jsonquery: src/main.o lib.a
	$(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $^ $(LDLIBS)

# TESTS
check: jsonquery_test
	./jsonquery_test

# main test suite
jsonquery_test: test/main.o lib.a
	$(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $^ $(LDLIBS)

# fuzzer test
jsonquery_fuzz: test/test_fuzzer.cpp lib.a
	@test $(FUZZ) || { echo -e "Fuzzing only works with clang and with FUZZ=1 when compiling ALL targets (you should run \"make clean\" if you previously built without fuzzing)! But with FUZZ=1 you can't make the other binaries.\n" && exit 1; }
	$(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $^ $(LDLIBS)

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

# Generate a .depend file that contains all the header dependencies
# in Makefile format so we can include it below
#
# NOTE: The strange loop is needed to fix the rules generated by $(CXX) -MM
# because that outputs a rule for "main.o" given the file "src/main.cpp" and
# "test/main.cpp" which is wrong
.depend: $(SRCS_ALL)
	$(RM) ./.depend
	for f in $^; do \
	    echo -n $$(dirname $$f)/ >> ./.depend; \
	    $(CXX) $(CXXFLAGS) -MM $$f >> ./.depend; \
	done

# CLEAN tasks
clean:
	$(RM) $(OBJS_ALL) lib.a

distclean: clean
	$(RM) *~ .depend

cleanall: distclean
	$(RM) jsonquery jsonquery_test jsonquery_fuzz

.PHONY: clean distclean cleanall all check

include .depend