Re: some questions about GNU make

[Sam Ravnborg]

On Sat, Aug 14, 2010 at 04:10:38PM +0430, ali hagigat wrote:
> 3.7 How Makefiles Are Remade
> Sometimes makefiles can be remade from other files, such as RCS or SCCS files.
> If a makefile can be remade from other files, you probably want make to get an
> up-to-date version of the makefile to read in.
> To this end, after reading in all makefiles, make will consider each as a
> goal target and
> attempt to update it. If a makefile has a rule which says how to update it
> (found either
> in that very makefile or in another one) or if an implicit rule applies to it
> (see Chapter 10
> [Using Implicit Rules], page 101), it will be updated if necessary. After
> all makefiles have been checked, if any have actually been changed, make
> starts with a clean slate and reads all the makefiles over again. (It will
> also attempt to update each of them over again, but normally this will not
> change them again, since they are already up to date.)
> --------------------------------------------------------------------------------------------
> I have copied some lines from the manual GNU make and have some questions.
> What are RCS and SCCS files? Where are they?

RCS:
http://en.wikipedia.org/wiki/Revision_Control_System
SCCS:
http://en.wikipedia.org/wiki/Source_Code_Control_System

> make will consider each Makefile as a goal target? What makefiles is it
> talking about? the makefiles that have been included?
Please have a look at "Including Other Makefiles"

Also if you cared to explain the background for your
question we could maybe help you.

        Sam