start implementing Arduino abstraction layer and add Makefile

Makefile

@@ -0,0 +1,30 @@
+CFLAGS?=-mcpu=cortex-m3 -mthumb -Og -fdata-sections -ffunction-sections -g -gdwarf-2 
+
+CC=arm-none-eabi-gcc
+CXX=arm-none-eabi-g++
+AR=arm-none-eabi-ar
+
+CFLAGS+=-I../ioLibrary_Driver/Ethernet -Isrc -IAAL
+
+OBJDIR=build
+VPATH=src AAL
+
+OBJS=$(addprefix $(OBJDIR)/,PubSubClient.o IPAddress.o Stream.o Arduino.o)
+
+all:	$(OBJS)
+	$(AR) rcs pubsub.a $^
+
+$(OBJDIR)/%.o:	%.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(OBJDIR)/%.o:	%.cpp
+	$(CXX) $(CFLAGS) -c $< -o $@
+
+$(OBJS): | $(OBJDIR)
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+.PHONY: clean
+clean:
+	-rm -rf $(OBJDIR)