Initial commit of block device interface and emulated block device

Makefile

@@ -0,0 +1,49 @@
+TARGET = lfs
+
+CC = gcc
+AR = ar
+SIZE = size
+
+SRC += $(wildcard *.c emubd/*.c)
+OBJ := $(SRC:.c=.o)
+DEP := $(SRC:.c=.d)
+ASM := $(SRC:.c=.s)
+
+ifdef DEBUG
+CFLAGS += -O0 -g3
+else
+CFLAGS += -O2
+endif
+ifdef WORD
+CFLAGS += -m$(WORD)
+endif
+CFLAGS += -I.
+CFLAGS += -std=c99 -Wall -pedantic
+
+
+all: $(TARGET)
+
+asm: $(ASM)
+
+size: $(OBJ)
+	$(SIZE) -t $^
+
+-include $(DEP)
+
+$(TARGET): $(OBJ)
+	$(CC) $(CFLAGS) $^ $(LFLAGS) -o $@
+
+%.a: $(OBJ)
+	$(AR) rcs $@ $^
+
+%.o: %.c
+	$(CC) -c -MMD $(CFLAGS) $< -o $@
+
+%.s: %.c
+	$(CC) -S $(CFLAGS) $< -o $@
+
+clean:
+	rm -f $(TARGET)
+	rm -f $(OBJ)
+	rm -f $(DEP)
+	rm -f $(ASM)