CC      = clang
LEX     = flex
YACC    = bison
CFLAGS  = -std=c17 -Wall -Wextra -Werror -Wpedantic -O2 -Ibin
SOURCES = ast.c ast.h eval.c eval.h lexer.h main.c
OBJECTS = bin/lexer.o bin/parser.o bin/ast.o bin/eval.o bin/main.o
SANITIZE = -g -O0 -fsanitize=address,undefined
PREFIX ?= /usr/local

.PHONY: all debug check format lint install uninstall clean

all: sfinae

bin:
	mkdir -p bin

sfinae: $(OBJECTS)
	$(CC) $(CFLAGS) -o $@ $(OBJECTS)

bin/lexer.c: sfinae.l | bin
	$(LEX) -o bin/lexer.c sfinae.l

bin/lexer.o: bin/lexer.c bin/parser.h ast.h lexer.h
	$(CC) -std=c17 -w -I. -c -o $@ bin/lexer.c

bin/parser.c bin/parser.h: sfinae.y | bin
	$(YACC) -d -o bin/parser.c sfinae.y

bin/parser.o: bin/parser.c
	$(CC) -std=c17 -w -I. -c -o $@ bin/parser.c

bin/%.o: %.c | bin
	$(CC) $(CFLAGS) -c -o $@ $<

bin/main.o: ast.h eval.h lexer.h
bin/ast.o:  ast.h lexer.h
bin/eval.o: eval.h ast.h

debug: CFLAGS += $(SANITIZE)
debug: clean sfinae

check: sfinae
	@for example in examples/*.sfinae tutorial/*.sfinae; do \
		echo "== $$example"; \
		./sfinae "$$example" || exit 1; \
	done

format:
	clang-format -i $(SOURCES)

lint:
	clang-tidy ast.c eval.c main.c -- -std=c17 -Ibin

install: sfinae
	install -d $(DESTDIR)$(PREFIX)/bin
	install -m 755 sfinae $(DESTDIR)$(PREFIX)/bin/sfinae

uninstall:
	rm -f $(DESTDIR)$(PREFIX)/bin/sfinae

clean:
	rm -rf bin sfinae