CC = gcc
STD_CFLAGS = -Wall -std=gnu99 -c -O2

# Enable ARM-specific options only on ARM, and compilation of the app only on ARM
UNAME := $(shell uname -m)
PCPUI := $(shell cat /proc/cpuinfo | grep Revision | cut -c16-)

# Determine the hardware platform. Below, pi1 stands for the RaspberryPi 1 (the original one),
# and pi2 stands for both the RaspberryPi 2 and 3.
ifeq ($(UNAME), armv6l)
	CFLAGS = $(STD_CFLAGS) -march=armv6 -mtune=arm1176jzf-s -mfloat-abi=hard -mfpu=vfp -ffast-math -DRASPI=1
	TARGET = pi1
else ifeq ($(PCPUI), 11)
	CFLAGS = $(STD_CFLAGS) -march=armv7-a -mtune=arm1176jzf-s -mfloat-abi=hard -mfpu=vfp -ffast-math -DRASPI=4
	TARGET = pi4
else ifeq ($(UNAME), armv7l)
	CFLAGS = $(STD_CFLAGS) -march=armv7-a -mtune=arm1176jzf-s -mfloat-abi=hard -mfpu=vfp -ffast-math -DRASPI=2
	TARGET = pi2
else
	CFLAGS = $(STD_CFLAGS)
	TARGET = other
endif

ifneq ($(TARGET), other)

app: pitxft.o mailbox.o
	$(CC) -o pitxft mailbox.o pitxft.o -lm

endif


mailbox.o: mailbox.c mailbox.h
	$(CC) $(CFLAGS) mailbox.c

pitxft.o: pitxft.c mailbox.h
	$(CC) $(CFLAGS) pitxft.c

clean:
	rm -f *.o