CFLAGS = -Wall -Wextra -g -Os
LDFLAGS =

SOURCES = xyw.c xywasm.c xywvm.c devices/system.c devices/terminal.c devices/clock.c devices/file.c devices/beeper.c
OBJS = xyw.o xywasm.o xywvm.o devices/system.o devices/terminal.o devices/clock.o devices/file.o devices/beeper.o

UNAME_S := $(shell uname -s)
HAVE_ALSA := $(shell \
    printf 'int main(void){return 0;}\n' | \
    $(CC) -x c - -lasound -o /dev/null >/dev/null 2>&1 && echo 1)

# beeper.c picks its audio backend at compile time via #ifdef, so the only
# thing the Makefile needs to do is link the matching system library.
ifeq ($(OS),Windows_NT)
    BIN := xyw.exe
    LDFLAGS += -lwinmm
else ifeq ($(UNAME_S),Darwin)
    LDFLAGS += -framework AudioToolbox -framework CoreFoundation
else ifeq ($(HAVE_ALSA),1)
    # Only link -lasound if the ALSA headers are actually installed
    LDFLAGS += -lasound
	# Fallback to libossaudio
else ifeq ($(HAVE_OSSAUDIO),1)
    LDLIBS += -lossaudio
else
	# No audio backend (beeper will throw an error)
    CFLAGS += -DXYW_NO_AUDIO_BACKEND
endif

.PHONY: clean test

xyw: $(OBJS)
	$(CC) $(CFLAGS) $(OBJS) -o xyw $(LDFLAGS)

xyw.o: xyw.c xyw.h
	$(CC) $(CFLAGS) -c xyw.c -o xyw.o

xywvm.o: xywvm.c xyw.h
	$(CC) $(CFLAGS) -c xywvm.c -o xywvm.o

xywasm.o: xywasm.c xyw.h
	$(CC) $(CFLAGS) -c xywasm.c -o xywasm.o

devices/system.o: devices/system.c devices/system.h xyw.h
	$(CC) $(CFLAGS) -c devices/system.c -o devices/system.o

devices/terminal.o: devices/terminal.c devices/terminal.h xyw.h
	$(CC) $(CFLAGS) -c devices/terminal.c -o devices/terminal.o

devices/clock.o: devices/clock.c devices/clock.h xyw.h
	$(CC) $(CFLAGS) -c devices/clock.c -o devices/clock.o

devices/file.o: devices/file.c devices/file.h xyw.h
	$(CC) $(CFLAGS) -c devices/file.c -o devices/file.o

devices/beeper.o: devices/beeper.c devices/beeper.h xyw.h
	$(CC) $(CFLAGS) -c devices/beeper.c -o devices/beeper.o

test:
	./test.sh
ifeq ($(OS),Windows_NT)
else
	@stty sane
endif

clean:
	rm -f xyw xyw.exe $(OBJS)