Which library implementation to use/work on?

[Andrew Haley]

On 03/13/2012 04:56 PM, Mike Hearn wrote:
> Hi there,
>
> I'm investigating GCJ for a project of mine to open up a Java library
> to the world of [Objective] C++ via the quite lovely CNI interface.
>
> My project depends on the Google protocol buffers library. Attempting
> to compile this jar reveals that there is a slight gap in
> java.util.regex in GNU Classpath.
>
> I'm trying to figure out what I should do with my time:
>
> 1) Write a patch to classpath - problem, project appears to be dead?
> 2) Try and somehow compile against Apache Harmony - problem, project
> also appears to be dead?
> 3) Change the protobufs library so it avoids the stubs in Classpath
>
> It seems that trying to support GCJ will keep my project at the level
> of Java 1.5 (or 1.4?) forever, as it's no longer being developed,
> which is a shame.
>
> I recall that some time ago Sun open sourced Java, but I don't know if
> it's compatible with what I want to do or how it plays together with
> GCJ (if at all).
>
> Any tips for what I should do?

I'd just fix up java.util.regex in Classpath as long as it wasn't
too hard.

Updating gcj to use the class library from Sun's now-free OpenJDK is
on my list of long-term projects.  It's a big job though, even for an
expert.

Andrew.