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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 12:59:52 -0400 (EDT)
- Subject: Re: [PATCH, libjava/classpath]: Fix overriding recipe for target 'gjdoc' build warning
- Authentication-results: sourceware.org; auth=none
- References: <CAFULd4YCSbA_2V8jNF1QtcM8b4EF8mJzTD7PyU9ETZ-uSyemsw at mail dot gmail dot com> <87y4h68tk3 dot fsf at tromey dot com> <55D58ED0 dot 1020402 at ubuntu dot com> <55D5909B dot 3080207 at redhat 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>
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.
--
Andrew :)
Senior Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)
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