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

[Andrew Cagney]

>>Date: Fri, 30 Jul 2004 09:23:48 -0400
>>> From: Andrew Cagney <cagney@gnu.org>
>>> 
>>> Check the contents of config/i386/xm-{cygwin,djgpp}.h.  Instead of being 
>>> detected by autoconf, those values are being hardwired.  Easy to fix
> 
> 
> Ah, that...  Your message made it sound as if there's some inherent
> problem that prevents autoconfiscation, so I was surprised.
> 
> Yes, it should be easy to fix, except for the gdb.ini part: if one
> builds the DJGPP port on Windows or cross-compiles on Unix, the
> filesystem will allow that name.  So the test needs to be dependent on
> the fact that a DJGPP port is being built, no matter what the
> underlying OS has to say about .gdbinit.

I've zapped most of the xm files, but the cygwin/djgpp ones are still there.

> Note that include/filenames.h has some constants similar to the `;' vs
> `:' stuff, so maybe some of GDB sources could use the results of
> autoconfiscation instead.

Yes.

Andrew