reduce libgcj building time

[Andreas Tobler]

Tom Tromey wrote:
> I keep a full build tree around at all times.  Rebuilds are usually
> quicker, though still not so fast as I would like.

Ya, sometimes you need to rebuild completely though. Especially when you 
  don't know what's happening. I usually do it the same. But even 
linking takes 20'.

> Yes, but this switch doesn't do what you think it does.  It controls
> which peers are built, not whether the platform-independent java.awt
> code is built.  All the Java code is compiled unconditionally.
> Likewise, --disable-java-net only disables the native code, not the
> Java code.

Ah, ok. Thanks for clarification.
> 
> If you want to go this route, you could try hacking the Makefile to
> remove the code you don't need.  However, that might not be as simple
> as you'd like, since Java's class libraries are fairly interdependent.
> 
Hm, I fear that I break here too much and I want to make sure that my 
things are working. So I keep a running system alive. :)

> I think you could remove AWT, applet, and Swing fairly easily.
> Removing java.net might be quite hard, since our bootstrap loader is a
> URLClassLoader and since Class refers to java.net in other ways.

Net is not necessary to be removed, just thought that I don't need it.
The others I try later.

My main problem is the slow shell I have here. Compilation itself is ok, 
but invoking the libtool shell what ever makes it slow here. Also a 
limitation from the fs I think?

Thank you anyway,

Andreas