.POSIX: # Just kidding, use GNU Make

CP       := cp -f

CC       := cc
CFLAGS   := -std=c99 -Wall -Wextra -Wpedantic
LDFLAGS  := -lgmp -lreadline

OBJ := dc.o

ifeq ($(DEBUG),1)
	CFLAGS += -Og -g
else
	CFLAGS += -O3 -funroll-loops -fomit-frame-pointer
endif

ifdef SAN
	CFLAGS += -fsanitize=$(SAN)
endif

ifeq ($(FOR_HUMANS),1)
  CPPFLAGS += -DFOR_HUMANS
endif

ifeq ($(DC_COMPLY),1)
  CPPFLAGS += -DDC_COMPLY
endif

ifdef PROGN
  CPPFLAGS += -DPROGN=\"$(PROGN)\"
else
  PROGN := dc
endif

%.o: %.c
	$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<

$(PROGN): $(OBJ)
	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ $< $(LDFLAGS)

config.h: config.mk.h
	$(CP) $< $@

dc.o: config.h ns.c

clean:
	$(RM) $(OBJ) $(PROGN)