makefiles and CVS

[Salman]

On Fri, 2003-01-24 at 14:25, Joel Sherrill wrote:
> Ralf Corsepius wrote:
> > 
> > On Fri, 2003-01-24 at 14:01, Salman wrote:
> > > Hey guys,
> > >
> > > I have a package here, which has its own makefile, and provides a single
> > > object file, which should be loaded as module into the linux kernel.
> > >
> > > Now, i've modified the code to load into rtems, and it should be placed
> > > in /libbsp/i386/pc386 directory. but i'm confused regarding Makefiles.
> > >
> > > RTEMS doc, states Makefile.in are the only makefiles required and the
> > > configure script generates other makefiles from this. Can anyone suggest
> > > how can I go about extracting Makefile.in files out of exisitng
> > > Makefiles?
> > No way. You need to manually write a Makefile.in or better (much easier)
> > write a Makefile.am.
> 
> Sounds like some piece of documentation needs to be updated to reflect
> the
> use of automake now.  Hopefully Salman can point us to the broken
> documentation.
> 

/ftp/pub/rtems/cd-working/rtems-doc-20021016/share/rtems/pdf/bsp_howto.pdf, section 3.1, there's no mention of Makefile.am and it mostly implies that Makefile.in is the key to all Makefiles and has to be provided by the user.

> Now this is the auto generated chain:
> 
> Makefile.am 
>   - automake produces Makefile.in 
>   - configure produces Makefile
> configure.ac
>   - auto??? produces configure.in
>   - autoconf produces configure
> 
> Notice that I don't even remember offhand the complete magic.  I rely
> on bootstrap also.
> 
> So Ralf is pointing you in the right direction, write a Makefile.am and
> use bootstrap.  I can't believe that it wouldn't be easier to adapt an
> existing RTEMS Makefile.am to compile the pieces you want than to
> attempt
> to bring a Linux Makefile in.  Ultimately, all you want to do is compile
> a few files with possibly some macros defined.  
> 
> > Alternatively you can try to modify the linux-Makefile to to fit into
> > RTEMS source-tree. Something I would strongly discourage you from,
> > because IMNSHO, the Linux' kernel Makefiles are not really worth looking
> > into, to put it politely ;)]
> > 
> > > I am now starting to modify rtems code as well, and would like to do
> > > this with aid of CVS, but when importing source files, it neglects
> > > Makefiles and configure scripts, has anyone experienced this problem
> > > before?
> > .
> > http://www.oarcorp.com/rtemsdoc-current/html/FAQ/FAQ00052.html
> > 
> > Ralf