src = $(wildcard src/*.c)
obj = $(src:.c=.o)
dep = $(obj:.o=.d)
bin = censuslogo

sys ?= $(shell uname -s | sed 's/MINGW.*/mingw/')

CFLAGS = -pedantic -Wall -g -DNOLOAD
LDFLAGS = $(LDFLAGS_$(sys)) -lm

LDFLAGS_Linux = -lGL -lGLU -lglut
LDFLAGS_mingw = -lmingw32 -mconsole -lfreeglut_static -lopengl32 -lglu32 -lgdi32 -lwinmm

ifeq ($(sys), mingw)
	obj = $(src:.c=.w32.o)
	bin = censuslogo.exe
	CFLAGS += -DFREEGLUT_STATIC
endif

$(bin): $(obj)
	$(CC) -o $@ $(obj) $(LDFLAGS)

-include $(dep)

%.d: %.c
	@$(CPP) $(CFLAGS) $< -MM -MT $(@:.d=.o) >$@

.PHONY: clean
clean:
	rm -f $(obj) $(bin)

.PHONY: cleandep
cleandep:
	rm -f $(dep)

# --- cross-compile rules for win32 ---
%.w32.o: %.c
	$(CC) -o $@ $(CFLAGS) -c $<

.PHONY: cross
cross:
	$(MAKE) CC=i686-w64-mingw32-gcc sys=mingw

.PHONY: cross-clean
cross-clean:
	$(MAKE) CC=i686-w64-mingw32-gcc sys=mingw clean