Re: PATCH: top level makefile cleanup (prep for autoconfiscation)

[Daniel Jacobowitz <drow at mvista dot com>]

On Mon, Jan 28, 2002 at 05:04:10PM -0500, Nathanael Nerode wrote:
> On 28 Jan 2002, Alexandre Oliva wrote:
> 
> > On Jan 28, 2002, Nathanael Nerode <neroden@doctormoo.dyndns.org> wrote:
> > 
> > > The dependencies are all right, but they're far from optimal.  There's a
> > > fair amount of missing dependency information in the Makefile, as well as
> > > some which I know to be bogus.  As for the configure.in file, it doesn't
> > > have proper dependencies, and relies on a sorting order, which is nasty.
> > 
> > Ok, so here's an idea, since you seem to be enjoying this project :-)
> > 
> > One of my quirks with the single-tree build is the long time it takes
> > to configure everything, the fact that it can't be done in
> > parallel, and the fact that one tool can't depend on the other having
> > already been built in order to do configure tests with it.
> > 
> > In my dream implementation of the top-level configure/Makefile, I'd
> > like the top-level configure to create just the top-level Makefile.
> > Everything else should be configured and built according to Makefile
> > rules.  For example, if the compiler wants an assembler to test, it
> > configure-gcc should depend on all-gas, but it doesn't need to depend
> > on say bison for configuration, only for building, so all-gcc would
> > depend on all-bison.
> > 
> > Is this in your plan?  If not, perhaps you would consider putting it
> > in?
> 
> This is in many ways the best way to do things.  Unless I hear arguments
> to the contrary, I intend to do as much as I can this way.
> 
> This involves significant restructuring of the Makefile, but I was going
> to have to do some of that anyway, and some of it should be done for speed
> anyway.

Just be careful trying to configure multiple targets at the same time. 
They share a config.cache; really only one of the scripts can safely
run at once.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer