Makefile

# indicate the Hardware Image file
HDA_IMG = hdc-0.11.img

#
# if you want the ram-disk device, define this to be the
# size in blocks.
#
RAMDISK =  #-DRAMDISK=512

# This is a basic Makefile for setting the general configuration
include Makefile.header

LDFLAGS	+= -Ttext 0 -e startup_32
CFLAGS	+= $(RAMDISK) -Iinclude
CPP	+= -Iinclude

#
# ROOT_DEV specifies the default root-device when making the image.
# This can be either FLOPPY, /dev/xxxx or empty, in which case the
# default of /dev/hd6 is used by 'build'.
#
ROOT_DEV= #FLOPPY 

ARCHIVES=kernel/kernel.o mm/mm.o fs/fs.o
DRIVERS =kernel/blk_drv/blk_drv.a kernel/chr_drv/chr_drv.a
MATH	=kernel/math/math.a
LIBS	=lib/lib.a

.c.s:
	@$(CC) $(CFLAGS) -S -o $*.s $<
.s.o:
	@$(AS)  -o $*.o $<
.c.o:
	@$(CC) $(CFLAGS) -c -o $*.o $<

all:	Image	

Image: boot/bootsect boot/setup tools/system
	@cp -f tools/system system.tmp
	@$(STRIP) system.tmp
	@$(OBJCOPY) -O binary -R .note -R .comment system.tmp tools/kernel
	@tools/build.sh boot/bootsect boot/setup tools/kernel Image $(ROOT_DEV)
	@rm system.tmp
	@rm -f tools/kernel
	@sync

disk: Image
	@dd bs=8192 if=Image of=/dev/fd0

boot/head.o: boot/head.s
	@make head.o -C boot/

tools/system:	boot/head.o init/main.o \
		$(ARCHIVES) $(DRIVERS) $(MATH) $(LIBS)
	@$(LD) $(LDFLAGS) boot/head.o init/main.o \
	$(ARCHIVES) \
	$(DRIVERS) \
	$(MATH) \
	$(LIBS) \
	-o tools/system 
	@$(NM) tools/system | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aU] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)'| sort > System.map 

kernel/math/math.a:dummy
	@make -C kernel/math

kernel/blk_drv/blk_drv.a:dummy
	@make -C kernel/blk_drv

kernel/chr_drv/chr_drv.a:dummy
	@make -C kernel/chr_drv

kernel/kernel.o:dummy
	@make -C kernel

mm/mm.o:dummy
	@make -C mm

fs/fs.o:dummy
	@make -C fs

lib/lib.a:dummy
	@make -C lib

boot/setup: boot/setup.s
	@make setup -C boot

boot/bootsect: boot/bootsect.s
	@make bootsect -C boot

tmp.s:	boot/bootsect.s tools/system
	@(echo -n "SYSSIZE = (";ls -l tools/system | grep system \
		| cut -c25-31 | tr '\012' ' '; echo "+ 15 ) / 16") > tmp.s
	@cat boot/bootsect.s >> tmp.s

.PHONY clean:
	@rm -f Image System.map tmp_make core boot/bootsect boot/setup
	@rm -f init/*.o tools/system boot/*.o typescript* info bochsout.txt bx_enh_dbg.ini
	@for i in mm fs kernel lib boot; do make clean -C $$i; done 

run: Image
	@if [ -d "hdc/usr" ]; then \
		sudo umount hdc; \
	fi
	@$(QEMU) -drive format=raw,if=floppy,file=Image -drive format=raw,if=ide,file=$(HDA_IMG) -boot a

debug: Image
	@if [ -d "hdc/usr" ]; then \
		sudo umount hdc; \
	fi
	@$(QEMU) -drive format=raw,if=floppy,file=Image -drive format=raw,if=ide,file=$(HDA_IMG) -boot a -s -S&

gdb:
	@$(GDB) -x tools/gdb-cmd.txt tools/system

lldb:
	@lldb -s tools/lldb-cmd.txt tools/system

bochs: Image
	@if [ -d "hdc/usr" ]; then \
		sudo umount hdc; \
	fi
	@$(BOCHS) -q -f tools/$(BXRC)

mount:
	@if [ ! -d "hdc/usr" ]; then \
		sudo mount -t minix -o loop,offset=512 $(HDA_IMG) hdc; \
	fi

umount:
	@sudo umount hdc

help:
	@echo "<<<<This is the basic help info of linux-0.11>>>"
	@echo ""
	@echo "Usage:"
	@echo "     make --generate a kernel floppy Image with a fs on hda1"
	@echo "     make run -- start the kernel in qemu"
	@echo "     make debug -- debug the kernel in qemu & gdb at port 1234. run before `make gdb` or vscode debug"
	@echo "     make gdb  -- start gdb ,connect to qemu and debug kernel. run `make debug` first"
	@echo "     make bochs -- debug the kernel in bochs"
	@echo "     make clean -- clean the object files"
	@echo ""
	@echo "Note!:"
	@echo "     * You need to install the following basic tools:"
	@echo "          qemu, bochs, make, gcc, binutils, gdb"
	@echo "     * Becarefull to change the compiling options, which will heavily"
	@echo "     influence the compiling procedure and running result."
	@echo ""
	@echo "Author:"
	@echo "     * 1991, linus write and release the original linux 0.95(linux 0.11)."
	@echo "     * 2005, jiong.zhao<gohigh@sh163.net> release a new version "
	@echo "     which can be used in RedHat 9 along with the book 'Explaining "
	@echo "     Linux-0.11 Completly', and he build a site http://www.oldlinux.org"
	@echo "     * 2008, falcon<wuzhangjin@gmail.com> release a new version which can be"
	@echo "     used in ubuntu|debian 32bit|64bit with gcc 4.3.2, and give some new "
	@echo "     features for experimenting. such as this help info, boot/bootsect.s and"
	@echo "     boot/setup.s with AT&T rewritting, porting to gcc 4.3.2 :-)"
	@echo ""
	@echo "<<<Be Happy To Play With It :-)>>>"

dummy:

### Dependencies:
init/main.o: init/main.c include/unistd.h include/sys/stat.h \
  include/sys/types.h include/sys/times.h include/sys/utsname.h \
  include/utime.h include/time.h include/linux/tty.h include/termios.h \
  include/linux/sched.h include/linux/head.h include/linux/fs.h \
  include/linux/mm.h include/signal.h include/asm/system.h \
  include/asm/io.h include/stddef.h include/stdarg.h include/fcntl.h