SRC = $(wildcard src/*.c)
INCLUDE =include/

BUILD:=build

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

OPT_FLAGS+= -fno-strict-aliasing -fomit-frame-pointer -fmerge-all-constants -fmodulo-sched -funswitch-loops -fsplit-loops

RELEASE_CFLAGS?=  -O3 $(OPT_FLAGS) 
RELEASE_LDFLAGS?= -O3 -flto

DEBUG_CFLAGS?=    -g -O0
DEBUG_LDFLAGS?=      -O0

LIB = lib

CFLAGS+= $(addprefix -I,$(INCLUDE)) -Wall -pedantic --std=gnu11 
LDFLAGS+= $(addprefix -L,$(LIB)) -lkhash
#./$(LIB)/libkhash.a -lpthread -ldl

PROJECT = kana-hash
OBJ = $(addprefix ./obj/,$(SRC:.c=.o))
OUTPUT = $(BUILD)/$(PROJECT)

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

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

.PHONY: test
test: | dirs $(OUTPUT)-test

dirs:
	@mkdir -p obj/src
	@mkdir -p $(BUILD)
	@ln -sf ./$(PROJECT)-release $(OUTPUT)

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

$(OUTPUT)-debug: CFLAGS := $(CFLAGS) $(DEBUG_CFLAGS)
$(OUTPUT)-debug: LDFLAGS:= $(LDFLAGS) $(DEBUG_LDFLAGS)
$(OUTPUT)-debug: $(OBJ)
	$(CC) $^ $(CFLAGS) -o $@ $(LDFLAGS)

$(OUTPUT)-release: CFLAGS := $(CFLAGS) $(RELEASE_CFLAGS)
$(OUTPUT)-release: LDFLAGS:= $(LDFLAGS) $(RELEASE_LDFLAGS)
$(OUTPUT)-release: $(OBJ)
	$(CC) $^ $(CFLAGS) -o $@ $(LDFLAGS)
	strip $@

$(OUTPUT)-test: CFLAGS:= $(CFLAGS) -DTEST
$(OUTPUT)-test: $(OBJ)
	$(CC) $^ $(CFLAGS) -o $@ $(LDFLAGS)
	./$@

clean:
	rm -rf ./obj
	rm -f $(OUTPUT)-{release,debug,test}