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+/* Check which version of the API and ABI are appropriate for the target.
+ Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+
+ Contributed by Iain Sandoe <iains@gcc.gnu.org>
+
+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/>. */
+
+#ifndef _OBJC_NEXT_ABI_H_
+#define _OBJC_NEXT_ABI_H_
+/* Produce a define that allows us to figure out what facilities are
+ available for this gcc and OS combination.
+*/
+
+/* By default we do nothing - therefore ifdef NEXT_OBJC_USE_NEW_INTERFACE
+ * is reliable for detecting versions of the target that require either
+ * API=2, or both API & ABI = 2 (m64 code).
+ *
+ * This applies for versions of OSX >= 10.5 (darwin9).
+ *
+ * A compiler capable of producing ObjC V2 ABI should define __OBJC2__
+*/
+
+#undef NEXT_OBJC_ABI_VERSION
+#undef NEXT_OBJC_USE_NEW_INTERFACE
+
+#ifdef __NEXT_RUNTIME__
+# if (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050 || __OBJC2__)
+ /* We have to use an updated interface for 32bit NeXT to avoid
+ * 'deprecated' warnings.
+ * For 64bit NeXT the ABI is different (and the interfaces 'deprecated'
+ * for 32bit have been removed).
+ */
+# define NEXT_OBJC_USE_NEW_INTERFACE 1
+# if __OBJC2__ || __LP64__
+ /* We have OBJC v2 ABI compiler,
+ (or, at least, the available NeXT runtime requires one) */
+# define NEXT_OBJC_ABI_VERSION 2
+# else
+ /* We leave it open to define ABI 1 if and when we implement those
+ * extensions.
+ */
+# define NEXT_OBJC_ABI_VERSION 0
+# endif
+# else
+ /* Pre-OSX 10.5 all is ABI 0. */
+# define NEXT_OBJC_ABI_VERSION 0
+# endif /* MAC_OS_X_VERSION_MIN_REQUIRED > 10.5 or OBJC2 */
+#endif /* __NEXT_RUNTIME__ */
+
+#endif /* _OBJC_NEXT_ABI_H_ */