To apply the patch, save the text below in a file (say `fix'), `cd top-of-gcc-distribution', then `patch -p1 < fix'

*** gcc-2.95/libio/strstream.cc Thu Aug 21 15:58:22 1997
--- gcc-2.95/libio/strstream.cc Tue May  9 14:17:57 2000
***************
*** 68,74 ****
  
  int strstreambuf::underflow()
  {
!   return _IO_str_underflow(this);
  }
  
  
--- 68,79 ----
  
  int strstreambuf::underflow()
  {
!   int c = _IO_str_underflow(this);
!  
!   if( c == EOF ) {
!     _flags |= _IO_EOF_SEEN;
!   }
!   return c;
  }