[autoconf-conversion] Re: Toplevel configury, multilibs, new autoconf versions

[Phil Edwards]

On Sun, Jul 27, 2003 at 04:49:26PM -0700, Zack Weinberg wrote:
> Phil Edwards <phil at jaj.com> writes:
> 
> > So, when the primary v3 configure is run,
> > the toplevel does it via
> >
> >     CXX=Primary $srcdir/configure --stuff
> >
> > Clear?
> >
> > Now, at the end of that run, config.status is generated and executed.
> > It source's config-ml.in, which runs through the list of multilib subdirs,
> > and does text substitution on the env variables.  Pretend we have one
> > multilib, and I'll call the CXX variable for that one Multilib:
> >
> >     # config-ml.in does this
> >     Multilib=`echo Primary | sed 's/references-to-primary-dir/references-to-multilib-dir'`
> >
> >     cd up-and-over-to-multilib-dir/libstdc++-v3
> >     CXX=Multilib $srcdir/configure --stuff
> 
> It seems to me that the problem is right here: we shouldn't have this
> Primary/Multilib distinction in the first place.  Suppose we hoist all
> the iteration over multilibs up to the top level Makefile.  Then each
> multilib directory gets configured as a 'primary' and the symptoms
> you've observed vanish.
> 
> I want this for other reasons - specifically, I want to be able to set
> up a multilib set that doesn't have any primary (default).

Nathanael also wants this, and I think it would probably be a good idea.

Phil

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