Thread support for VxWorks

[Jeffrey A Law]

  In message <199802052340.PAA23288@kankakee.wrs.com>you write:
  > Here is a first cut at thread support for C++ EH.  I noticed that the
  > FSF doesn't have thread support yet, does someone want to work on
  > getting all the threading work into the FSF tree?
  > 
  > 1998-02-05  Mike Stump  <mrs@wrs.com>
  > 
  > 	* gthr.h: Support systems that don't have weak, but have threads.
  > 	* configure.in (*wrs-vxworks*): Use VxWorks threads by default.
  > 	* gthr-vxworks.h: New file.
  > 	* objc/thr-vxworks.h: Dummy file from thr-single.c for now.
Nobody seemed to want to comment on this patch.  I don't see that
it'll break anything but possibly VxWorks.  I went ahead and installed
it.

If it causes any problems we'll just have to deal with them.

jeff