OUTPUT_DIR    = build

CFLAGS	      = -Ilibwebsockets/include -Llibwebsockets/lib
can_compile   = $(shell set -x; if echo '$(1)' | $(CC) $(CFLAGS) -c -xc - -o /dev/null >/dev/null 2>&1; then echo yes; fi)
HAVE_RFID    := $(call can_compile,\#include <uFCoder.h>)

ifeq ($(HAVE_RFID),yes)
all: mtrfid
else
$(warning Compiling without RFID support)
endif

mtrfid_SRCS   = signal_exit.c mt_rfid.c
mtrfid_LIBS   = -lev -luFCoder-armhf

mtserver_SRCS = signal_exit.c mt_server.c
mtserver_LIBS = -lev -lwebsockets

mtkeys_SRCS   = signal_exit.c mt_keys.c
mtkeys_LIBS   = -lev

mtaio_SRCS    = signal_exit.c mt_keys.c mt_server.c mt_aio.c
mtaio_LIBS    = -lev -lwebsockets
mtaio_DEFS    = -DNO_MAIN -DHAVE_RFID=$(if $(HAVE_RFID),1,0)

ifeq ($(HAVE_RFID),yes)
mtaio_SRCS += mt_rfid.c
mtaio_LIBS += -luFCoder-armhf
endif

all: mtserver mtkeys mtaio

.PHONY: clean

clean:
	rm -rf $(OUTPUT_DIR)

.SECONDEXPANSION:
mt%: $$($$@_SRCS)
	mkdir -p $(OUTPUT_DIR)
	$(CC) $(CFLAGS) $($@_DEFS) -o $(OUTPUT_DIR)/$@ $^ $($@_LIBS)