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diff --git a/gcc/config/nvptx/nvptx.opt b/gcc/config/nvptx/nvptx.opt
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+; Options for the NVPTX port
+; Copyright (C) 2014-2015 Free Software Foundation, Inc.
+;
+; This file is part of GCC.
+;
+; GCC 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 3, or (at your option) any later
+; version.
+;
+; GCC 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 GCC; see the file COPYING3. If not see
+; <http://www.gnu.org/licenses/>.
+
+m64
+Target Report RejectNegative Mask(ABI64)
+Generate code for a 64 bit ABI
+
+m32
+Target Report RejectNegative InverseMask(ABI64)
+Generate code for a 32 bit ABI
+
+mmainkernel
+Target Report RejectNegative
+Link in code for a __main kernel.