makefile的语法及写法
#0001 # filename : hello.mak
#0002 # make file for hello.exe (MFC 4.0 Application)
#0003 # usage : nmake hello.mak (Visual C++ 5.0)
#0004
#0005 Hello.exe : StdAfx.obj Hello.obj Hello.res
#0006 link.exe /nologo /subsystem:windows /incremental:no \
#0007 /machine:I386 /out:"Hello.exe" \
#0008 Hello.obj StdAfx.obj Hello.res \
#0009 msvcrt.lib kernel32.lib user32.lib gdi32.lib mfc42.lib
#0010
#0011 StdAfx.obj : StdAfx.cpp StdAfx.h
#0012 cl.exe /nologo /MD /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" \
#0013 /D "_AFXDLL" /D "_MBCS" /Fp"Hello.pch" /Yc"stdafx.h" \
#0014 /c StdAfx.cpp
#0015
#0016 Hello.obj : Hello.cpp Hello.h StdAfx.h
#0017 cl.exe /nologo /MD /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" \
#0018 /D "_AFXDLL" /D "_MBCS" /Fp"Hello.pch" /Yu"stdafx.h" \
#0019 /c Hello.cpp
#0020
#0021 Hello.res : Hello.rc Hello.ico jjhour.ico
#0022 rc.exe /l 0x404 /Fo"Hello.res" /D "NDEBUG" /D "_AFXDLL" Hello.rc
以上前三行是什么意思?makefile的语法及意义?谢了。