CC_BIN ?= gcc
LEX_BIN ?= flex
YACC_BIN ?=  bison

GRAMMARS_DIR ?= ./grammars
GRAMMAR_ID ?= lysator
SAMPLES_DIR ?= ./samples
output ?= $(GRAMMAR_ID)-cocc

all: $(output)

$(GRAMMAR_ID).tab.h: $(GRAMMARS_DIR)/$(GRAMMAR_ID).y
	$(YACC_BIN) -d $?

lex.yy.c: $(GRAMMARS_DIR)/$(GRAMMAR_ID).l $(GRAMMAR_ID).tab.h
	$(LEX_BIN) $<

$(output): lex.yy.c $(GRAMMAR_ID).tab.c $(GRAMMAR_ID).tab.h 
	$(CC_BIN) -o $@ lex.yy.c $(GRAMMAR_ID).tab.c

clean: 
	rm -f lex.yy.c *.tab.c *.tab.h *-cocc

test: $(SAMPLES_DIR) $(output)
	for cfile in $(SAMPLES_DIR)/*; do printf "\n\n *** file: %s *** \n" $$cfile; ./$(output) < $$cfile; [ -eq $$? 0 ];  done