Add base code

os/Makefile

@@ -0,0 +1,22 @@
+CC = arm-none-eabi-gcc
+AS = arm-none-eabi-as
+LD = arm-none-eabi-ld
+CPU = -mcpu=cortex-m4
+THUMB = -mthumb
+
+LDFLAGS = -T linker.ld
+CFLAGS = -c $(CPU) $(THUMB) -g
+
+all: main.o process.o scheduler.o
+
+main.o: main.c
+	$(CC) $(CFLAGS) main.c -o main.o
+
+scheduler.o: scheduler.c
+	$(CC) $(CFLAGS) scheduler.c -o scheduler.o
+
+process.o: process.c
+	$(CC) $(CFLAGS) process.c -o process.o
+
+clean:
+	rm -f *.elf *.o *.i