Patch: replace mutex with object synchronization

[Jeff Sturm]

On 13 Apr 2004, Tom Tromey wrote:
> Bryce> I guess it doesn't matter right now, since libgcj itself isn't
> Bryce> built with the BC-ABI, but eventually, using Java locks here
> Bryce> could potentially lead to circularity problems.
>
> I suspect there will always be a few classes we don't compile with the
> BC ABI.  Object, maybe Class and String too.  This seems like an area
> we need to experiment with once the patches are in.

Yeah.  At one time I successfully compiled most of libgcj with
-fno-assume-compiled.  Except java.lang.Class; I don't remember why but it
did not work.

Jeff