add

From-SVN: r48885

gcc/config/rs6000/altivec-defs.h

+/* Target definitions for GNU compiler for PowerPC with AltiVec.
+   Copyright (C) 2001 Free Software Foundation, Inc.
+   Contributed by Aldy Hernandez (aldyh@redhat.com).
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#undef SUBSUBTARGET_OVERRIDE_OPTIONS
+#define SUBSUBTARGET_OVERRIDE_OPTIONS	\
+do {					\
+  rs6000_altivec_abi = 1;		\
+  target_flags |= MASK_ALTIVEC;		\
+} while (0)