--- /dev/null
+// Inspired by libstdc++/7680 & 26_numerics/c_math.cc, 2003-04-12 ljr
+
+// Copyright (C) 2003, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library 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.
+
+// This library 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 library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+
+// { dg-do link }
+// { dg-options "-D_XOPEN_SOURCE" { target *-*-freebsd* } }
+
+#include <cmath>
+
+int
+test01()
+{
+ float a = 1.f;
+ float b;
+ std::modf(a, &b);
+ return 0;
+}
+
+int
+test02 ()
+{
+ float a = 0.0f;
+ float b __attribute__((unused)) = std::acos(a);
+ return 0;
+}
+
+int
+main()
+{
+ test01();
+ test02();
+ return 0;
+}