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Re: [PATCH, libjava/classpath]: Fix overriding recipe for target 'gjdoc' build warning
- From: Andrew Hughes <gnu dot andrew at redhat dot com>
- To: Richard Biener <richard dot guenther at gmail dot com>
- Cc: Andrew Haley <aph at redhat dot com>, Matthias Klose <doko at ubuntu dot com>, Tom Tromey <tom at tromey dot com>, Jeff Law <law at redhat dot com>, Uros Bizjak <ubizjak at gmail dot com>, gcc-patches at gcc dot gnu dot org, java-patches at gcc dot gnu dot org
- Date: Thu, 20 Aug 2015 18:32:17 -0400 (EDT)
- Subject: Re: [PATCH, libjava/classpath]: Fix overriding recipe for target 'gjdoc' build warning
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- References: <CAFULd4YCSbA_2V8jNF1QtcM8b4EF8mJzTD7PyU9ETZ-uSyemsw at mail dot gmail dot com> <401143105 dot 13318272 dot 1440082676204 dot JavaMail dot zimbra at redhat dot com> <55D5F1C8 dot 7060003 at redhat dot com> <753848288 dot 13346990 dot 1440085975680 dot JavaMail dot zimbra at redhat dot com> <6D3AF2B0-A114-4871-B606-E17C19D0D8B4 at gmail dot com> <100448475 dot 13392788 dot 1440089992425 dot JavaMail dot zimbra at redhat dot com> <118141631 dot 13413443 dot 1440092137784 dot JavaMail dot zimbra at redhat dot com> <3CB72092-59D0-4110-ADAB-5112AEB62A69 at gmail dot com>
----- Original Message -----
> On August 20, 2015 7:35:37 PM GMT+02:00, Andrew Hughes
> <gnu.andrew@redhat.com> wrote:
> >----- Original Message -----
> >> snip...
> >> >
> >> > Having classpath (with binary files!) In the GCC SVN (or future
> >git)
> >> > repository is a significant burden, not to mention the size of the
> >> > distributed source tarball.
> >> >
> >> > If we can get rid of that that would be a great step in reducing
> >the
> >> > burden.
> >> >
> >> > Iff we can even without classpath build enough of java to be useful
> >(do you
> >> > really need gcj or only gij for bootstrapping openjdk? After all
> >ecj is
> >> > just
> >> > a drop-in to gcc as well).
> >>
> >> All the Java compilers are written in Java (ecj & javac). So to run
> >them, you
> >> need a JVM and its class library.
> >>
> >> It's those binary files which allow gcj to bootstrap the stack. If
> >OpenJDK
> >> had a minimal binary class library, it would be able to bootstrap
> >itself.
> >>
> >> But, as things stand, you need enough of the JDK to run a Java
> >compiler
> >> and build the OpenJDK class libraries. GCJ currently fulfils that
> >need
> >> where there isn't already an OpenJDK installation available.
> >> --
> >
> >Actually, this makes me think...
> >
> >IcedTea already depends on CACAO and JamVM for alternate builds of
> >OpenJDK. We could instead include the bytecode binaries for GNU
> >Classpath
> >in IcedTea, bootstrap JamVM and use that to bootstrap OpenJDK. That
> >would remove our dependency on gcj and make IcedTea largely
> >self-sufficient.
> >It would also mean we could drop a bunch of conditional code which
> >depends
> >on what the system bootstrap JDK is, because it would always be the
> >in-tree
> >solution.
> >
> >We'd still need more than six months to make this transition though,
> >as such a change really needs time for testing.
>
> OK, so how about deprecating Java for GCC 6 by removing it from the default
> languages and removing it for GCC 7 or before we switch to git (whatever
> happens earlier?)
>
Yeah, that's what I suggested at the end of [0] so +1 from me.
As Joseph says, I don't think the move to git is relevant to this. If it
had happened sooner, though, I'd have properly merged GNU Classpath more
frequently... ;)
> Richard.
>
>
>
[0] https://gcc.gnu.org/ml/java-patches/2015-q3/msg00029.html
--
Andrew :)
Senior Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)
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