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
+$(warning Compiling without RFID support)
+endif
+
mtrfid_SRCS = signal_exit.c mt_rfid.c
mtrfid_LIBS = -lev -luFCoder-armhf
mtserver_SRCS = signal_exit.c mt_server.c
mtserver_LIBS = -lev -lwebsockets
-mtaio_SRCS = signal_exit.c mt_rfid.c mt_server.c mt_aio.c
-mtaio_LIBS = -lev -luFCoder-armhf -lwebsockets
-mtaio_DEFS = -DNO_MAIN
+mtkeys_SRCS = signal_exit.c mt_keys.c
+mtkeys_LIBS = -lev
+
+mtaio_SRCS = signal_exit.c mt_keys.c mt_server.c mt_aio.c
+mtaio_LIBS = -lev -lwebsockets
+mtaio_DEFS = -DNO_MAIN -DHAVE_RFID=$(if $(HAVE_RFID),1,0)
+
+ifeq ($(HAVE_RFID),yes)
+mtaio_SRCS += mt_rfid.c
+mtaio_LIBS += -luFCoder-armhf
+endif
-all: mtrfid mtserver mtaio
+all: mtserver mtkeys mtaio
.PHONY: clean