Fix in-src-tree builds by making gdbserver/gnulib/ a separate library (a la libiberty, etc.), and adding ACX_CONFIGURE_DIR.

[Jan Kratochvil]

On Wed, 18 Apr 2012 18:03:55 +0200, Mark Kettenis wrote:
> 1. The ability to build native debuggers for mutiple platforms from a
>    single (NFS mounted) source tree.

Just copy it locally.  For example 1000 times, even without filesystem
automatic deduplication.

Engineering time is much more expensive than some disk space nowadays.
This is why new projects no longer support such extra features like
out-of-src-tree builds.


Regards,
Jan