Index: gdb/aarch64-obsd-tdep.h
--- gdb/aarch64-obsd-tdep.h.orig
+++ gdb/aarch64-obsd-tdep.h
@@ -0,0 +1,28 @@
+/* OpenBSD/aarch64 target support, prototypes.
+
+   Copyright (C) 2017-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program 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 of the License, or
+   (at your option) any later version.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef AARCH64_OBSD_TDEP_H
+#define AARCH64_OBSD_TDEP_H
+
+#include "regset.h"
+
+extern const struct regset aarch64_obsd_gregset;
+extern const struct regset aarch64_obsd_fpregset;
+
+#endif /* AARCH64_OBSD_TDEP_H */