Patch: switch to __builtin_alloca

[Bryce McKinlay]

Anthony Green wrote:

> I made a number of minor changes to libjava and the gcj build system
> in order to improve cross-compilation, especially for embedded
> targets.
>
> The hope is that the runtime should just build, no matter what the
> target.

Do you think we should remove all the "noconfigdirs="${libgcj}" stuff from the
top-level configure.in? After all, the top-level won't try to build java
unless "--enable-languages=java" is supplied anyway.

regards

  [ bryce ]