--with-openjdk bootstrap

[Dr Andrew John Hughes]

On 18:58 Mon 02 Aug     , DJ Lucas wrote:
> On 08/02/2010 10:44 AM, Dr Andrew John Hughes wrote:
> 
> > It's been a long while since I went through LFS, but I remember I used
> > to just build the initial gcc with gcj at the time.  Maybe that would be
> > an option for some users? IcedTea shouldn't require much more than that.
> > You can disable Rhino using --without-rhino.
> 
> Yes that would be possible.  I'm also not sure if it is possible to
> build now without the symlinks provided by the gcj-compat package.  I've
> honestly never tried it.  Is gcj and the third party jars all that are
> required now?
> 

It should be.  Sadly, theory and practice are not always the same.  If you
do run into problems, please let us know the details so we can fix the issue.

> >> I just figured I'd ask first before duplicating work that is already
> >> done (and am glad that I did).  I'm going to take a look at the
> >> --with-gcj-home option first, since that can be beneficial for more than
> >> myself, and see if I can get that going, but I'll be poking around in 7
> >> now as well, provide a local patch for the book if needs be.  :-)
> >>
> > 
> > Let us know how you get on.  The eventual plan is to separate the options,
> > so you'd have --disable-bootstrap and --with-jdk-home as in IcedTea7.
> 
> Funny, prior to that response, I was going to ask if --with-java-home
> and --enable-bootstrap options would be useful to the project. :-)
> 
> I'll probably go ahead and go for the changes that you've already put
> into 7 for a local patch (for my own use at first).  I want the option
> of providing a fully self contained JDK (as has always been, though I
> will loose a lot of the educational value), and I'll want it for 1.8.1
> and then 1.9.  Seems a good place where I could help out a little.  I
> imagine that it'll be too raw for 1.9 this close to a release, not sure
> about after the fact for the branch though.
> 

You're right, we don't want such major build changes going into 1.9.
Once it branches, I'll make the changes to HEAD.

> Given the time since those changes were made (July of 2009) and the
> number of changes since (plus I've still got to find when --with-icedtea
> came into the mix), I doubt that a true 'backport' by taking the
> unaltered commits is possible (though I certainly could be wrong).  I
> figure single stepping through commits to configure.ac from the time
> that --with-icedtea went in will get me to most, if not all, of the
> needed changes.  I'll be happy to break it down into pieces as I go
> (I'll need to do this anyway).  Is there any more accounting info other
> than the changeset numbers needed for a backport when the time comes for
> 1.10 (or 1.9.1 if deemed safe)?
> 

I wouldn't recommend a literal backport of changesets.  Not only are
the changes to IcedTea7 about a year old, after which both 6 and 7
have had more changes, but the two had already diverged pretty far by
the point too (for good reason in some places).  It'd be much easier
to take the ideas from IcedTea7 and apply them to IcedTea6 as it
stands today.  As I say, I'll do this to IcedTea6 after 1.9 branches
off on Thursday, and you can then take those changes and apply them
locally to 1.8 & 1.9 as you wish.

As to --with-icedtea, that option was there from the start.  As far as I'm
aware, early versions of IcedTea had --with-gcj-home, with-icedtea,
--with-icedtea-home, --with-openjdk-home and --with-openjdk (!).  On 6,
we've managed to merge the latter four into just --with-openjdk already,
so the final step is to merge --with-gcj-home and --with-openjdk into
--with-jdk-home and create a separate option, --disable-bootstrap
for bootstrapping (rather than having it implicit in --with-openjdk).

> Again, thank you very much for the suggestions and help so far, and
> everyone involved for this project as a whole.
> 

No problem.  I hope you find something that works for you.

> -- DJ Lucas
> 
> -- 
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Thanks,
-- 
Andrew :)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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