--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgcc/find-symver.awk	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,28 @@
+# Extract the version of a single symbol from the version map.
+# Copyright (C) 2014-2017 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/>.
+
+/^[A-Z]/ {
+  version = $1;
+  next;
+}
+
+$1 == symbol {
+  print version
+  exit
+}