-all: main.c
- gcc -o mt-rfid main.c -luFCoder-armhf
+OUTPUT_DIR = build
+
+CFLAGS = -Ilibwebsockets/include -Llibwebsockets/lib
+can_compile = $(shell if echo '$(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
+$(warning Compiling without RFID support)
+endif
+
+mtrfid_SRCS = signal_exit.c mt_rfid.c
+mtrfid_LIBS = -lev -luFCoder-armhf
+mtrfid_DEFS = -DHAVE_RFID=1
+
+mtserver_SRCS = signal_exit.c mt_server.c
+mtserver_LIBS = -lev -lwebsockets
+
+mtkeys_SRCS = signal_exit.c mt_keys.c
+mtkeys_LIBS = -lev
+
+mtaio_SRCS = signal_exit.c mt_keys.c mt_server.c mt_aio.c mt_blank.c
+mtaio_LIBS = -lev -lwebsockets
+mtaio_DEFS = -DNO_MAIN -DHAVE_RFID=$(if $(HAVE_RFID),1,0)
+
+ifeq ($(HAVE_RFID),yes)
+mtaio_SRCS += mt_rfid.c
+mtaio_LIBS += -luFCoder-armhf
+else
+mtaio_SRCS += mt_sim.c
+mtaio_DEFS += -DSIM=1
+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)