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bug#26966: [PATCH 01/22] gnu: Add jikes.
From: |
Ludovic Courtès |
Subject: |
bug#26966: [PATCH 01/22] gnu: Add jikes. |
Date: |
Thu, 18 May 2017 13:54:21 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) |
Ricardo Wurmus <address@hidden> skribis:
> From: Ricardo Wurmus <address@hidden>
>
> * gnu/packages/java.scm (jikes): New variable.
[...]
> +;;;
> +;;; Java bootstrap toolchain.
> +;;;
> +
> +;; The Java bootstrap begins with Jikes, a Java compiler. We use it to build
> +;; the SableVM standard library and virtual machine. This is sufficient to
> +;; build an older version of Ant, which is needed to build an older version
> of
> +;; ECJ, an incremental Java compiler.
Maybe you could mention the implementation language of these three tools
to clarify this choice?
> +;; ECJ is needed to build the latest release of GNU Classpath (0.99).
> +;; Classpath (> 0.98) is a requirement for JamVM, a more modern
> implementation
> +;; of the Java virtual machine.
> +;;
> +;; With JamVM we can build the latest development version of GNU Classpath,
> +;; which has much more support for Java 1.6 than the latest release. Since
> +;; the previous build of JamVM is limited by the use of GNU Classpath 0.99 we
> +;; rebuild it with the latest development version of GNU Classpath.
> +;;
> +;; Finally, we use the bootstrap toolchain to build the OpenJDK with the
> +;; Icedtea 1.x build framework. We then build the more recent JDKs Icedtea
> +;; 2.x and Icedtea 3.x.
This process looks future proof to me, which is really nice. That is,
Jikes is in C++ so when a new architecture comes out we won’t have
difficulties building it natively; tools implementing the old Java
language and librairies are “stuck in time” but that’s OK because they
don’t rely on anything special beyond C/C++/POSIX.
Ludo’.
- bug#26966: [PATCH 21/22] gnu: ant: Update to 1.10.1., (continued)
bug#26966: [PATCH 22/22] gnu: Remove GCJ., Ricardo Wurmus, 2017/05/17
bug#26966: [PATCH 01/22] gnu: Add jikes., Roel Janssen, 2017/05/18
bug#26966: [PATCH 01/22] gnu: Add jikes.,
Ludovic Courtès <=
bug#26966: New Java bootstrap, Roel Janssen, 2017/05/18
bug#26966: New Java bootstrap, Ludovic Courtès, 2017/05/18
bug#26966: New Java bootstrap, Roel Janssen, 2017/05/22