--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/fortran/trigd_fe.inc	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,53 @@
+
+
+/* Stub for defining degree-valued trigonemetric functions using MPFR.
+   Copyright (C) 2000-2020 Free Software Foundation, Inc.
+   Contributed by Fritz Reese <foreese@gcc.gnu.org>
+   and Steven G. Kargl <kargl@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/>.  */
+
+#define FTYPE mpfr_t
+#define RETTYPE void
+#define RETURN(x) do { } while (0)
+#define ITYPE mpz_t
+
+#define ISFINITE(x) mpfr_number_p(x)
+#define D2R(x) deg2rad(x)
+
+#define ENABLE_SIND
+#define ENABLE_COSD
+#define ENABLE_TAND
+
+#define SIND simplify_sind
+#define COSD simplify_cosd
+#define TAND simplify_tand
+
+/* cosd(30) === sqrt(3) / 2.  */
+#define SET_COSD30(x) do { \
+    mpfr_set_ui (x, 3, GFC_RND_MODE); \
+    mpfr_sqrt (x, x, GFC_RND_MODE); \
+    mpfr_div_ui (x, x, 2, GFC_RND_MODE); \
+  } while (0)
+
+static RETTYPE SIND (FTYPE);
+static RETTYPE COSD (FTYPE);
+static RETTYPE TAND (FTYPE);
+
+#include "../../libgfortran/intrinsics/trigd.inc"
+
+/* vim: set ft=c: */