Nachos(2)-lab0修改Makefile

本次目标

在上一篇博客中，已经在Ubuntu16.04LTS32位的操作系统上下载解压了Nachos3.4版本，并且通过简单的测试，确认了Nachos是可以正常运行的。

这篇博文记录了Nachos中的Makefile文件是如何控制整个系统如何编译&链接的；并且给Nachos源代码中增加一个mytest/add.c文件，然后修改Makefile文件，让整个Nachos操作系统能在修改了Makefile的情况下正常运行。

Makefile简介

略过。

理解Nachos3.4中的Makefile。

重点关注自己写过的注释

code目录下的Makefile文件，可以看到有all，print，clean三个make选项。

code目录下除了有Makefile文件之外，还有Makefile.dep文件（用来指定Nachos运行的宿主机的体系结构，默认的是HOST = -DHOST_i386，所以Nachos代码不用做任何修改就可以运行在Ubuntu16.04LTS32位下），还有一个Makefile.common文件（里面定义很多的变量，CC = g++,LD = g++,PROGRAM = nachos,THREAD_H =../threads/copyright.h\)，实际上Makefile.common就是定义了要用到的变量。

# Copyright (c) 1992 The Regents of the University of California.
# All rights reserved.  See copyright.h for copyright notice and limitation 
# of liability and disclaimer of warranty provisions.

MAKE = make #定义变量MAKE
LPR = lpr #定义变量LPR lineprint用来输出信息的

all: 
    cd threads; $(MAKE) depend #重点关注线程部分
    cd threads; $(MAKE) nachos
    cd userprog; $(MAKE) depend 
    cd userprog; $(MAKE) nachos 
    cd vm; $(MAKE) depend
    cd vm; $(MAKE) nachos 
    cd filesys; $(MAKE) depend
    cd filesys; $(MAKE) nachos 
    cd network; $(MAKE) depend
    cd network; $(MAKE) nachos 
    cd bin; make all
    cd test; make all

# don't delete executables in "test" in case there is no cross-compiler
clean:
    /bin/csh -c "rm -f *~ */{core,nachos,DISK,*.o,swtch.s,*~} test/{*.coff} bin/{coff2flat,coff2noff,disassemble,out}"

# make print执行前要先apt install csh 
# 但是即使下载了csh执行make print也会遇到 no default destination available的错误
# 但是反正这个就是用来打印信息的，pass……
print:
    /bin/csh -c "$(LPR) Makefile* */Makefile"
    /bin/csh -c "$(LPR) threads/*.h threads/*.cc threads/*.s"
    /bin/csh -c "$(LPR) userprog/*.h userprog/*.cc" 
    /bin/csh -c "$(LPR) filesys/*.h filesys/*.cc
    /bin/csh -c "$(LPR) network/*.h network/*.cc 
    /bin/csh -c "$(LPR) machine/*.h machine/*.cc
    /bin/csh -c "$(LPR) bin/noff.h bin/coff.h bin/coff2noff.c"
    /bin/csh -c "$(LPR) test/*.h test/*.c test/*.s"

重点关注线程部分的Makefile，code/threads下的Makefile文件如下：

# NOTE: this is a GNU Makefile.  You must use "gmake" rather than "make".
#
# Makefile for the threads assignment.  The threads assignment must
#  be done first!
#
# Copyright (c) 1992 The Regents of the University of California.
# All rights reserved.  See copyright.h for copyright notice and limitation 
# of liability and disclaimer of warranty provisions.

DEFINES = -DTHREADS #gcc里面的-D选项，定义了宏THREADS
INCPATH = -I../threads -I../machine #include path 头文件去哪里找，gcc里面的-I选项
HFILES = $(THREAD_H) #.h文件，THREAD_H在/code下的Makefile.common定义了
CFILES = $(THREAD_C)
C_OFILES = $(THREAD_O)

include ../Makefile.common
include ../Makefile.dep
# 下面的这些东西是每个目标文件的依赖项，不要删除下面的任何东西，依赖必须放在文件的结束
# 所以？make nachos 和 make depend在哪里呢？
# 在Makefile.common中，用模式匹配很好的解决了make depend 和make nachos的问题。
#-----------------------------------------------------------------
# DO NOT DELETE THIS LINE -- make depend uses it
# DEPENDENCIES MUST END AT END OF FILE
main.o: ../threads/main.cc ../threads/copyright.h ../threads/utility.h \
 ../threads/bool.h ../machine/sysdep.h ../threads/copyright.h \
 /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/system.h ../threads/thread.h \
 ../threads/scheduler.h ../threads/list.h ../machine/interrupt.h \
 ../threads/list.h ../machine/stats.h ../machine/timer.h \
 ../threads/utility.h
list.o: ../threads/list.cc ../threads/copyright.h ../threads/list.h \
 ../threads/utility.h ../threads/bool.h ../machine/sysdep.h \
 ../threads/copyright.h /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h
scheduler.o: ../threads/scheduler.cc ../threads/copyright.h \
 ../threads/scheduler.h ../threads/list.h ../threads/utility.h \
 ../threads/bool.h ../machine/sysdep.h ../threads/copyright.h \
 /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/thread.h ../threads/system.h \
 ../machine/interrupt.h ../threads/list.h ../machine/stats.h \
 ../machine/timer.h ../threads/utility.h
synch.o: ../threads/synch.cc ../threads/copyright.h ../threads/synch.h \
 ../threads/thread.h ../threads/utility.h ../threads/bool.h \
 ../machine/sysdep.h ../threads/copyright.h /usr/include/stdio.h \
 /usr/include/features.h /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/list.h ../threads/system.h \
 ../threads/scheduler.h ../machine/interrupt.h ../threads/list.h \
 ../machine/stats.h ../machine/timer.h ../threads/utility.h
synchlist.o: ../threads/synchlist.cc ../threads/copyright.h \
 ../threads/synchlist.h ../threads/list.h ../threads/utility.h \
 ../threads/bool.h ../machine/sysdep.h ../threads/copyright.h \
 /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/synch.h ../threads/thread.h
system.o: ../threads/system.cc ../threads/copyright.h ../threads/system.h \
 ../threads/utility.h ../threads/bool.h ../machine/sysdep.h \
 ../threads/copyright.h /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/thread.h ../threads/scheduler.h \
 ../threads/list.h ../machine/interrupt.h ../threads/list.h \
 ../machine/stats.h ../machine/timer.h ../threads/utility.h
thread.o: ../threads/thread.cc ../threads/copyright.h ../threads/thread.h \
 ../threads/utility.h ../threads/bool.h ../machine/sysdep.h \
 ../threads/copyright.h /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/switch.h ../threads/synch.h \
 ../threads/list.h ../threads/system.h ../threads/scheduler.h \
 ../machine/interrupt.h ../threads/list.h ../machine/stats.h \
 ../machine/timer.h ../threads/utility.h
utility.o: ../threads/utility.cc ../threads/copyright.h \
 ../threads/utility.h ../threads/bool.h ../machine/sysdep.h \
 ../threads/copyright.h /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/stdarg.h
threadtest.o: ../threads/threadtest.cc ../threads/copyright.h \
 ../threads/system.h ../threads/utility.h ../threads/bool.h \
 ../machine/sysdep.h ../threads/copyright.h /usr/include/stdio.h \
 /usr/include/features.h /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/thread.h ../threads/scheduler.h \
 ../threads/list.h ../machine/interrupt.h ../threads/list.h \
 ../machine/stats.h ../machine/timer.h ../threads/utility.h \
 ../machine/elevatortest.h
interrupt.o: ../machine/interrupt.cc ../threads/copyright.h \
 ../machine/interrupt.h ../threads/list.h ../threads/copyright.h \
 ../threads/utility.h ../threads/bool.h ../machine/sysdep.h \
 /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/system.h ../threads/thread.h \
 ../threads/scheduler.h ../threads/list.h ../machine/interrupt.h \
 ../machine/stats.h ../machine/timer.h ../threads/utility.h
sysdep.o: ../machine/sysdep.cc ../threads/copyright.h \
 /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h /usr/include/signal.h \
 /usr/include/i386-linux-gnu/bits/sigset.h \
 /usr/include/i386-linux-gnu/bits/signum.h /usr/include/time.h \
 /usr/include/i386-linux-gnu/bits/siginfo.h \
 /usr/include/i386-linux-gnu/bits/sigaction.h \
 /usr/include/i386-linux-gnu/bits/sigcontext.h \
 /usr/include/i386-linux-gnu/asm/sigcontext.h /usr/include/linux/types.h \
 /usr/include/i386-linux-gnu/asm/types.h /usr/include/asm-generic/types.h \
 /usr/include/asm-generic/int-ll64.h \
 /usr/include/i386-linux-gnu/asm/bitsperlong.h \
 /usr/include/asm-generic/bitsperlong.h /usr/include/linux/posix_types.h \
 /usr/include/linux/stddef.h \
 /usr/include/i386-linux-gnu/asm/posix_types.h \
 /usr/include/i386-linux-gnu/asm/posix_types_32.h \
 /usr/include/i386-linux-gnu/bits/sigstack.h \
 /usr/include/i386-linux-gnu/sys/ucontext.h \
 /usr/include/i386-linux-gnu/bits/pthreadtypes.h \
 /usr/include/i386-linux-gnu/bits/sigthread.h \
 /usr/include/i386-linux-gnu/sys/types.h /usr/include/endian.h \
 /usr/include/i386-linux-gnu/bits/endian.h \
 /usr/include/i386-linux-gnu/bits/byteswap.h \
 /usr/include/i386-linux-gnu/sys/select.h \
 /usr/include/i386-linux-gnu/bits/select.h \
 /usr/include/i386-linux-gnu/bits/time.h \
 /usr/include/i386-linux-gnu/sys/sysmacros.h \
 /usr/include/i386-linux-gnu/sys/time.h \
 /usr/include/i386-linux-gnu/sys/socket.h \
 /usr/include/i386-linux-gnu/sys/uio.h \
 /usr/include/i386-linux-gnu/bits/uio.h \
 /usr/include/i386-linux-gnu/bits/socket.h \
 /usr/include/i386-linux-gnu/bits/sockaddr.h \
 /usr/include/i386-linux-gnu/asm/socket.h \
 /usr/include/asm-generic/socket.h \
 /usr/include/i386-linux-gnu/asm/sockios.h \
 /usr/include/asm-generic/sockios.h \
 /usr/include/i386-linux-gnu/sys/file.h /usr/include/fcntl.h \
 /usr/include/i386-linux-gnu/bits/fcntl.h \
 /usr/include/i386-linux-gnu/bits/stat.h \
 /usr/include/i386-linux-gnu/sys/un.h \
 /usr/include/i386-linux-gnu/sys/mman.h \
 /usr/include/i386-linux-gnu/bits/mman.h /usr/include/unistd.h \
 /usr/include/i386-linux-gnu/bits/posix_opt.h \
 /usr/include/i386-linux-gnu/bits/environments.h \
 /usr/include/i386-linux-gnu/bits/confname.h /usr/include/getopt.h \
 /usr/include/errno.h /usr/include/i386-linux-gnu/bits/errno.h \
 /usr/include/linux/errno.h /usr/include/i386-linux-gnu/asm/errno.h \
 /usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h \
 ../machine/interrupt.h ../threads/list.h ../threads/copyright.h \
 ../threads/utility.h ../threads/bool.h ../machine/sysdep.h \
 ../threads/system.h ../threads/thread.h ../threads/scheduler.h \
 ../threads/list.h ../machine/interrupt.h ../machine/stats.h \
 ../machine/timer.h ../threads/utility.h
stats.o: ../machine/stats.cc ../threads/copyright.h ../threads/utility.h \
 ../threads/copyright.h ../threads/bool.h ../machine/sysdep.h \
 /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../machine/stats.h
timer.o: ../machine/timer.cc ../threads/copyright.h ../machine/timer.h \
 ../threads/utility.h ../threads/copyright.h ../threads/bool.h \
 ../machine/sysdep.h /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/system.h ../threads/utility.h \
 ../threads/thread.h ../threads/scheduler.h ../threads/list.h \
 ../machine/interrupt.h ../threads/list.h ../machine/stats.h \
 ../machine/timer.h
elevatortest.o: ../machine/elevatortest.cc ../threads/copyright.h \
 ../machine/elevatortest.h ../machine/elevator.h ../threads/utility.h \
 ../threads/copyright.h ../threads/bool.h ../machine/sysdep.h \
 /usr/include/stdio.h /usr/include/features.h \
 /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/list.h ../threads/utility.h \
 ../threads/synch.h ../threads/thread.h ../threads/list.h \
 ../threads/thread.h
elevator.o: ../machine/elevator.cc ../threads/copyright.h \
 ../machine/elevator.h ../threads/utility.h ../threads/copyright.h \
 ../threads/bool.h ../machine/sysdep.h /usr/include/stdio.h \
 /usr/include/features.h /usr/include/i386-linux-gnu/bits/predefs.h \
 /usr/include/i386-linux-gnu/sys/cdefs.h \
 /usr/include/i386-linux-gnu/bits/wordsize.h \
 /usr/include/i386-linux-gnu/gnu/stubs.h \
 /usr/include/i386-linux-gnu/gnu/stubs-32.h \
 /usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h \
 /usr/include/i386-linux-gnu/bits/types.h \
 /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/libio.h \
 /usr/include/_G_config.h /usr/include/wchar.h ../threads/stdarg.h \
 /usr/include/i386-linux-gnu/bits/stdio_lim.h \
 /usr/include/i386-linux-gnu/bits/sys_errlist.h /usr/include/string.h \
 /usr/include/xlocale.h ../threads/list.h ../threads/utility.h \
 ../threads/system.h ../threads/thread.h ../threads/scheduler.h \
 ../threads/list.h ../machine/interrupt.h ../machine/stats.h \
 ../machine/timer.h
# DEPENDENCIES MUST END AT END OF FILE
# IF YOU PUT STUFF HERE IT WILL GO AWAY
# see make depend above

Makefile.common文件如下：

# This is part of a GNU Makefile, included by the Makefiles in
# each of the subdirectories.  
#
# This file includes all of the baseline code provided by Nachos.
# Whenever you add a .h or .cc file, put it in the appropriate 
# _H,_C, or _O list.
#
# The dependency graph between assignments is:
#   1. THREADS before everything else
#   2. USERPROG must come before VM
#   3. USERPROG can come before or after FILESYS, but if USERPROG comes 
#    before (as in this distribution), then it must define FILESYS_STUB
#
#   Other than that, you have complete flexibility.
#
# Also whenever you change the include structure of your program, you should 
# do a gmake depend in the subdirectory -- this will modify the Makefile
# to keep track of the new dependency.

# You might want to play with the CFLAGS, but if you use -O it may
# break the thread system.  You might want to use -fno-inline if
# you need to call some inline functions from the debugger.

# Copyright (c) 1992 The Regents of the University of California.
# All rights reserved.  See copyright.h for copyright notice and limitation 
# of liability and disclaimer of warranty provisions.

CFLAGS = -g -Wall -Wshadow -fpermissive $(INCPATH) $(DEFINES) $(HOST) -DCHANGED 

# These definitions may change as the software is updated.
# Some of them are also system dependent
CPP= gcc -E
CC = g++
LD = g++
AS = as

PROGRAM = nachos

THREAD_H =../threads/copyright.h\
    ../threads/list.h\
    ../threads/scheduler.h\
    ../threads/synch.h \
    ../threads/synchlist.h\
    ../threads/system.h\
    ../threads/thread.h\
    ../threads/utility.h\
    ../machine/interrupt.h\
    ../machine/sysdep.h\
    ../machine/stats.h\
    ../machine/timer.h\
    ../machine/elevator.h\
    ../machine/elevatortest.h

THREAD_C =../threads/main.cc\
    ../threads/list.cc\
    ../threads/scheduler.cc\
    ../threads/synch.cc \
    ../threads/synchlist.cc\
    ../threads/system.cc\
    ../threads/thread.cc\
    ../threads/utility.cc\
    ../threads/threadtest.cc\
    ../machine/interrupt.cc\
    ../machine/sysdep.cc\
    ../machine/stats.cc\
    ../machine/timer.cc\
    ../machine/elevatortest.cc\
    ../machine/elevator.cc

THREAD_S = ../threads/switch.s

THREAD_O =main.o list.o scheduler.o synch.o synchlist.o system.o thread.o \
    utility.o threadtest.o interrupt.o stats.o sysdep.o timer.o elevator.o \
    elevatortest.o

USERPROG_H = ../userprog/addrspace.h\
    ../userprog/bitmap.h\
    ../filesys/filesys.h\
    ../filesys/openfile.h\
    ../machine/console.h\
    ../machine/machine.h\
    ../machine/mipssim.h\
    ../machine/translate.h

USERPROG_C = ../userprog/addrspace.cc\
    ../userprog/bitmap.cc\
    ../userprog/exception.cc\
    ../userprog/progtest.cc\
    ../machine/console.cc\
    ../machine/machine.cc\
    ../machine/mipssim.cc\
    ../machine/translate.cc

USERPROG_O = addrspace.o bitmap.o exception.o progtest.o console.o machine.o \
    mipssim.o translate.o

VM_H = 
VM_C = 
VM_O = 

FILESYS_H =../filesys/directory.h \
    ../filesys/filehdr.h\
    ../filesys/filesys.h \
    ../filesys/openfile.h\
    ../filesys/synchdisk.h\
    ../machine/disk.h
FILESYS_C =../filesys/directory.cc\
    ../filesys/filehdr.cc\
    ../filesys/filesys.cc\
    ../filesys/fstest.cc\
    ../filesys/openfile.cc\
    ../filesys/synchdisk.cc\
    ../machine/disk.cc
FILESYS_O =directory.o filehdr.o filesys.o fstest.o openfile.o synchdisk.o\
    disk.o

NETWORK_H = ../network/post.h ../machine/network.h
NETWORK_C = ../network/nettest.cc ../network/post.cc ../machine/network.cc
NETWORK_O = nettest.o post.o network.o

S_OFILES = switch.o

OFILES = $(C_OFILES) $(S_OFILES)

# 这里就是make nachos的模式匹配的命令
$(PROGRAM): $(OFILES)
    $(LD) $(OFILES) $(LDFLAGS) -o $(PROGRAM)

$(C_OFILES): %.o:
    $(CC) $(CFLAGS) -c $<

switch.o: ../threads/switch.s
    $(CPP) -P $(INCPATH) $(HOST) ../threads/switch.c > swtch.s
    $(AS) -o switch.o swtch.s

#这里是make depend模式匹配的命令
depend: $(CFILES) $(HFILES)
    $(CC) $(INCPATH) $(DEFINES) $(HOST) -DCHANGED -M $(CFILES) > makedep
    echo '/^# DO NOT DELETE THIS LINE/+2,$$d' >eddep
    echo '$$r makedep' >>eddep
    echo 'w' >>eddep
    ed - Makefile < eddep
    rm eddep makedep 
    echo '# DEPENDENCIES MUST END AT END OF FILE' >> Makefile
    echo '# IF YOU PUT STUFF HERE IT WILL GO AWAY' >> Makefile
    echo '# see make depend above' >> Makefile

Nachos中增加一个mytest模块。

修改code下的Makefile文件，在mytest文件夹下写Makefile和add.c，code目录下make all，编译没有错误。

可以写个头文件，在threads/main里面调用add函数。

这样要修改的Makefile文件就比较多了……Makefile.common和threads里面的Makefile都需要修改

最后的运行结果如下：