changes for approval, part three (solaris)

[David Edelsohn]

	v3 only is intended to be compiled by gcc-3, expects a GNU libc
environment, and many of the other _G_config.h macros are unused, so might
I suggest that libio.h define the GNU libc cdefs.h macros as it expects
them to be defined:

Index: libio.h
===================================================================
RCS file: /cvs/gcc/egcs/libstdc++-v3/libio/libio.h,v
retrieving revision 1.8
diff -c -p -r1.8 libio.h
*** libio.h	2000/10/18 23:29:30	1.8
--- libio.h	2000/10/25 00:59:01
***************
*** 56,72 ****
  #endif
  
  #ifndef __P
! # if _G_HAVE_SYS_CDEFS
! #  include <sys/cdefs.h>
! # else
! #  ifdef __STDC__
! #   define __P(p) p
! #   define __PMT(p) p
! #  else
! #   define __P(p) ()
! #   define __PMT(p) ()
! #  endif
! # endif
  #endif /*!__P*/
  
  /* For backward compatibility */
--- 56,63 ----
  #endif
  
  #ifndef __P
! # define __P(p) p __THROW
! # define __PMT(p) p
  #endif /*!__P*/
  
  /* For backward compatibility */

This seems a lot more straight-forward than each target fixing up cdefs.h
to match GNU libc and removes some of the redundancy in the solaris patch.

David