# Generic C and C++ Makefile project template
# Contains targets for `release', `debug', and `clean'.

PROJECT=naka
DESCRIPTION=Find a file within another file(s)
AUTHOR=Avril (Flanchan) <flanchan@cumallover.me>
LICENSE=GPL3+

VERSION_MAJ=0
VERSION_MIN=0
VERSION_BF=0
VERSION_REV=0

VERSION:=$(VERSION_MAJ).$(VERSION_MIN).$(VERSION_BF).$(VERSION_REV)

COMP_TIME:=$(shell date -u +%s)

SRC_C   = $(wildcard src/*.c) $(wildcard src/tests/*.c)
SRC_CXX = $(wildcard src/*.cpp)

INCLUDE=include

# Set compile-time features
# # Available features
#  * PARALLEL - Enable multithreaded processing (currently unimplemented.)
FEATURES?=

META_FLAGS:=-D_PROJECT_AUTHOR="\"$(AUTHOR)\"" -D_PROJECT_DESCRIPTION="\"$(DESCRIPTION)\"" -D_PROJECT_NAME="\"$(PROJECT)\"" \
		-D_PROJECT_LICENSE="\"$(LICENSE)\"" \
		-D_VERSION_MAJOR=$(VERSION_MAJ) -D_VERSION_MINOR=$(VERSION_MIN) \
		-D_VERSION_BUGFIX=$(VERSION_BF) -D_VERSION_REVISION=$(VERSION_REV) \
		-D_PROJECT_COMPILED=$(COMP_TIME)

COMMON_FLAGS+= -W -Wall -fno-strict-aliasing $(addprefix -I,$(INCLUDE)) $(META_FLAGS) $(addprefix -D_FEATURE_,$(FEATURES))

ARCH?=native
OPT_FLAGS+= -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4 \
	    -floop-interchange -ftree-loop-distribution -floop-strip-mine -floop-block \
	    -fno-stack-check

CXX_OPT_FLAGS+= $(OPT_FLAGS) -felide-constructors

CFLAGS   += $(COMMON_FLAGS) --std=gnu11
CXXFLAGS += $(COMMON_FLAGS) --std=gnu++20 -fno-exceptions
LDFLAGS  +=  

STRIP=strip

RELEASE_CFLAGS?=   -O3 -flto $(OPT_FLAGS) $(addprefix -march=,$(ARCH))
RELEASE_CXXFLAGS?= -O3 -flto $(CXX_OPT_FLAGS) $(addprefix -march=,$(ARCH))
RELEASE_LDFLAGS?=  -O3 -flto

DEBUG_CFLAGS?= -O0 -g -DDEBUG
DEBUG_CXXFLAGS?= $(DEBUG_CFLAGS)
DEBUG_LDFLAGS?=

# Objects

OBJ_C   = $(addprefix obj/c/,$(SRC_C:.c=.o))
OBJ_CXX = $(addprefix obj/cxx/,$(SRC_CXX:.cpp=.o))
OBJ = $(OBJ_C) $(OBJ_CXX)

# Phonies

.PHONY: release
release: | dirs $(PROJECT)-release

.PHONY: debug
debug: | dirs $(PROJECT)-debug

# Targets

dirs:
	@mkdir -p obj/c{,xx}/src{,/tests}

obj/c/%.o: %.c
	$(CC) -c $< $(CFLAGS) -o $@ $(LDFLAGS)

obj/cxx/%.o: %.cpp
	$(CXX) -c $< $(CXXFLAGS) -o $@ $(LDFLAGS)

$(PROJECT)-release: CFLAGS+= $(RELEASE_CFLAGS)
$(PROJECT)-release: CXXFLAGS += $(RELEASE_CXXFLAGS)
$(PROJECT)-release: LDFLAGS += $(RELEASE_LDFLAGS)
$(PROJECT)-release: $(OBJ)
	$(CXX) $^ $(CXXFLAGS) -o $@ $(LDFLAGS)
	$(STRIP) $@

$(PROJECT)-debug: CFLAGS+= $(DEBUG_CFLAGS)
$(PROJECT)-debug: CXXFLAGS += $(DEBUG_CXXFLAGS)
$(PROJECT)-debug: LDFLAGS += $(DEBUG_LDFLAGS)
$(PROJECT)-debug: $(OBJ)
	$(CXX) $^ $(CXXFLAGS) -o $@ $(LDFLAGS)

clean-rebuild:
	rm -rf obj

clean: clean-rebuild
	rm -f $(PROJECT)-{release,debug,pgo}