CC=gcc
OUT=oats.out
LIBS=-I.
ARGS=

RELEASE=0
GFLAGS=-Wall -Wextra -Wswitch-enum -Werror -std=c11
DFLAGS=-ggdb -fsanitize=address -fsanitize=undefined
RFLAGS=-O3
DEPFLAGS=-MT $@ -MMD -MP -MF

ifeq ($(RELEASE), 1)
CFLAGS=$(GFLAGS) $(RFLAGS) -DDEBUG=0
else
CFLAGS=$(GFLAGS) $(DFLAGS)
endif

DIST=build
SRC:=tag.c memory.c vec.c sv.c lisp.c reader.c eval.c main.c
OBJ:=$(SRC:%.c=$(DIST)/%.o)
DEPDIR=$(DIST)/dependencies
DEPS:=$(SRC:%.c=$(DEPDIR)/%.d)

.PHONY: all
all: $(DIST)/$(OUT)

$(DIST)/%.o: %.c | $(DIST) $(DEPDIR)
	$(CC) $(CFLAGS) $(DEPFLAGS) $(DEPDIR)/$*.d -c $< -o $@ $(LIBS)

$(DIST)/$(OUT): $(OBJ) | $(DIST)
	$(CC) $(CFLAGS) $^ -o $@ $(LIBS)

.PHONY: run
run: $(DIST)/$(OUT)
	./$^ $(ARGS)

.PHONY:
clean:
	rm -rfv $(DIST)/*

$(DIST):
	mkdir -p $(DIST)

$(DEPDIR):
	mkdir -p $(DEPDIR)

.PHONY:
watch:
	find . -type 'f' -regex ".*.c\\|.*.h" | entr -cs "make run"

-include $(DEPS)