makefile

.DEFAULT_GOAL := op2utility

.PHONY: all
all: op2utility test

SRCDIR := OP2Utility/src
BUILDDIR := .build
INTDIR := $(BUILDDIR)/OP2Utility/obj
OUTPUT := libOP2Utility.a

clangWarnNotInterested := -Wno-c++98-compat-pedantic -Wno-pre-c++17-compat
clangWarnShow := -Weverything $(clangWarnNotInterested)

CXXFLAGS_WARN := -Wall -Wno-unknown-pragmas
CXXFLAGS := -std=c++20 -g $(CXXFLAGS_EXTRA) $(CXXFLAGS_WARN)

DEPFLAGS = -MT $@ -MMD -MP -MF $(INTDIR)/$*.Td

COMPILE.cpp = $(CXX) $(DEPFLAGS) $(CXXFLAGS) $(TARGET_ARCH) -c
POSTCOMPILE = @mv -f $(INTDIR)/$*.Td $(INTDIR)/$*.d && touch $@

SRCS := $(shell find $(SRCDIR) -name '*.cpp')
OBJS := $(patsubst $(SRCDIR)/%.cpp,$(INTDIR)/%.o,$(SRCS))
FOLDERS := $(sort $(dir $(SRCS)))

.PHONY: op2utility
op2utility: $(OUTPUT)

$(OUTPUT): $(OBJS)
	@mkdir -p ${@D}
	ar rcs $@ $^

$(OBJS): $(INTDIR)/%.o : $(SRCDIR)/%.cpp $(INTDIR)/%.d
	@mkdir -p ${@D}
	$(COMPILE.cpp) $(OUTPUT_OPTION) $<
	$(POSTCOMPILE)

$(INTDIR)/%.d: ;
.PRECIOUS: $(INTDIR)/%.d

include $(wildcard $(patsubst $(SRCDIR)/%.cpp,$(INTDIR)/%.d,$(SRCS)))


GTESTSRCDIR := /usr/src/googletest/
GTESTINCDIR := /usr/src/googletest/googletest/include/
GTESTBUILDDIR := $(BUILDDIR)/gtest/
GTESTLOCALLIBDIR := $(GTESTBUILDDIR)googlemock/
GTESTLIBDIR := /usr/lib/

.PHONY: gtest gtest-install gtest-clean
gtest:
	mkdir -p "$(GTESTBUILDDIR)"
	cd "$(GTESTBUILDDIR)" && cmake -DCMAKE_CXX_COMPILER="$(CXX)" -DCMAKE_C_COMPILER="$(CC)" -DCMAKE_CXX_FLAGS="-std=c++20" "$(GTESTSRCDIR)"
	make -C "$(GTESTBUILDDIR)"
gtest-install:
	cp $(GTESTBUILDDIR)googlemock/gtest/lib*.a "$(GTESTLIBDIR)"
	cp $(GTESTBUILDDIR)googlemock/lib*.a "$(GTESTLIBDIR)"
gtest-clean:
	rm -rf "$(GTESTBUILDDIR)"


TESTDIR := OP2UtilityTest
TESTINTDIR := $(BUILDDIR)/testObj
TESTSRCS := $(shell find $(TESTDIR) -name '*.cpp')
TESTOBJS := $(patsubst $(TESTDIR)/%.cpp,$(TESTINTDIR)/%.o,$(TESTSRCS))
TESTFOLDERS := $(sort $(dir $(TESTSRCS)))
TESTCPPFLAGS := -I$(SRCDIR) -I$(GTESTINCDIR)
TESTLDFLAGS := -L./ -L$(GTESTLOCALLIBDIR) -L$(GTESTLOCALLIBDIR)/gtest/
TESTLIBS := -lOP2Utility -lgmock_main -lgmock -lgtest -lpthread -lstdc++fs
TESTOUTPUT := $(BUILDDIR)/testBin/runTests

TESTDEPFLAGS = -MT $@ -MMD -MP -MF $(TESTINTDIR)/$*.Td
TESTCOMPILE.cpp = $(CXX) $(TESTCPPFLAGS) $(TESTDEPFLAGS) $(CXXFLAGS) $(TARGET_ARCH) -c
TESTPOSTCOMPILE = @mv -f $(TESTINTDIR)/$*.Td $(TESTINTDIR)/$*.d && touch $@

.PHONY: test
test: $(TESTOUTPUT)

.PHONY: check
check: $(TESTOUTPUT)
	cd "$(TESTDIR)" && "../$(TESTOUTPUT)"

$(TESTOUTPUT): $(TESTOBJS) $(OUTPUT)
	@mkdir -p ${@D}
	$(CXX) $(TESTOBJS) $(TESTLDFLAGS) $(TESTLIBS) -o $@

$(TESTOBJS): $(TESTINTDIR)/%.o : $(TESTDIR)/%.cpp $(TESTINTDIR)/%.d
	@mkdir -p ${@D}
	$(TESTCOMPILE.cpp) $(OUTPUT_OPTION) -I$(SRCDIR) $<
	$(TESTPOSTCOMPILE)

$(TESTINTDIR)/%.d: ;
.PRECIOUS: $(TESTINTDIR)/%.d

include $(wildcard $(patsubst $(TESTDIR)/%.cpp,$(TESTINTDIR)/%.d,$(TESTSRCS)))


.PHONY: clean clean-all
clean:
	-rm -fr $(INTDIR)
	-rm -fr $(TESTINTDIR)
clean-all: clean
	-rm -fr $(BUILDDIR)
	-rm -f $(OUTPUT)


## Linting ##

.PHONY: show-warnings
show-warnings:
	@$(MAKE) clean > /dev/null
	$(MAKE) --output-sync CXX=clang++ CXXFLAGS_WARN="$(clangWarnShow)" 2>&1 >/dev/null | grep -o "\[-W.*\]" | sort | uniq
	@echo
	$(MAKE) --output-sync all CXX=clang++ CXXFLAGS_WARN="$(clangWarnShow)" 2>&1 >/dev/null | grep -o "\[-W.*\]" | sort | uniq
	@$(MAKE) clean > /dev/null

.PHONY: lint
lint: cppcheck cppclean cppinclude

.PHONY: cppcheck
cppcheck:
	cppcheck --quiet "$(SRCDIR)"

.PHONY: cppclean
cppclean:
	cppclean --quiet "$(SRCDIR)"

.PHONY: cppinclude
cppinclude:
	cppinclude --show_details=false --report_limit=30

.PHONY: cppinclude-detailed
cppinclude-detailed:
	cppinclude


## Debugging ##

.PHONY: stale
stale:
	@$(MAKE) all -n | grep -oE '[^ ]+\.cpp$$' || true

.PHONY: stale-objs
stale-objs:
	@$(MAKE) all -n | grep -oE '[^ ]+\.o$$' || true

# This can create a lot of extra tab auto complete entries, so maybe disable by default
AllObjectFiles := $(OBJS)) $(TESTOBJS)
AllObjectShortNames := #$(sort $(basename $(notdir $(AllObjectFiles))))
.PHONY: $(AllObjectShortNames)
$(AllObjectShortNames):
	$(MAKE) $(filter %$@.o,$(AllObjectFiles))


## Compile performance ##

.PHONY: flame-charts
flame-charts:
	$(MAKE) all CXX=clang++ CXXFLAGS_EXTRA="-ftime-trace"