[6.3] Drop xm-*.h from GDB - move to pure autoconf

[Andrew Cagney]

>>Date: Thu, 29 Jul 2004 20:04:48 -0400
>>> From: Andrew Cagney <cagney@gnu.org>
>>> 
>>> At this stage, the only issue I know of blocking the xm file removal, is 
>>> DOS file support.  Both DJGPP and CYGWIN appear to have configury not 
>>> yet handled by autoconf.
> 
> 
> ??? Could you spell out the problems?
> 
> There are dozens of GNU projects, all of them using Autoconf (and also
> libtool, for that matter), that were ported to DJGPP by running the
> configure script with minimal changes (akin the config.sed script used
> by GDB).  I'm not aware of any problems that would stop the show for
> you, but perhaps I'm missing something.

Right.

>>> - have DJGPP and CYGWIN use autoconf for DOS file support
> 
> 
> What do you mean by that?  What ``DOS file support'' in GDB needs to
> be autoconfiscated?

Check the contents of config/i386/xm-{cygwin,djgpp}.h.  Instead of being 
detected by autoconf, those values are being hardwired.  Easy to fix (I 
just fixed HOST_FLOAT_FORMAT).

Andrew