Toplevel cleanup: reduce libgcj disabling

[Paolo Bonzini]

On 04/28/2011 06:17 PM, Joseph S. Myers wrote:
> This patch cleans up the libgcj-disabling case statement at toplevel,
> removing the default disabling for *-*-* (which allows other empty
> cases to be removed) and disabling based on architecture, or most
> cases of architecture-OS combination where the OS previously had
> libgcj built for other architectures.
>
> I left the logic restricting libgcj on Darwin to certain targets, but
> removed that relating to FreeBSD and NetBSD targets (given the removal
> of support for a.out NetBSD, and that there was never such support for
> a.out FreeBSD, I doubt the reliability of the lists of targets that
> were present).  target-libffi disabling for arm-*-elf* | arm*-*-eabi*
> was removed (given that there*is*  libffi support for those targets),
> and target-zlib disabling for hppa*64*-*-linux* was changed to disable
> Java.
>
> This is the last cleanup I plan for this libgcj-disabling logic.  This
> patch is*not*  conservatively safe; the idea is that if it turns out
> that there are problems building some Java library on a
> libffi-supporting target where the library was not previously built,
> appropriate disabling should be added *with a comment explaining the
> problem and probably pointing to a relevant PR*.
>
> OK to commit?
>

Ok.

Paolo