--- /dev/null
+/* Test of <fenv.h> substitute in C++ mode.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+
+ 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 <https://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010. */
+
+#define GNULIB_NAMESPACE gnulib
+#include <config.h>
+
+#include <fenv.h>
+
+#include "signature.h"
+
+
+#if GNULIB_TEST_FEGETENV
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fegetenv, int, (fenv_t *));
+#endif
+
+#if GNULIB_TEST_FESETENV
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fesetenv, int, (fenv_t const *));
+#endif
+
+#if GNULIB_TEST_FEUPDATEENV
+SIGNATURE_CHECK (GNULIB_NAMESPACE::feupdateenv, int, (fenv_t const *));
+#endif
+
+#if GNULIB_TEST_FEHOLDEXCEPT
+SIGNATURE_CHECK (GNULIB_NAMESPACE::feholdexcept, int, (fenv_t *));
+#endif
+
+#if GNULIB_TEST_FEGETROUND
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fegetround, int, (void));
+#endif
+
+#if GNULIB_TEST_FESETROUND
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fesetround, int, (int));
+#endif
+
+#if GNULIB_TEST_FECLEAREXCEPT
+SIGNATURE_CHECK (GNULIB_NAMESPACE::feclearexcept, int, (int));
+#endif
+
+#if GNULIB_TEST_FERAISEEXCEPT
+SIGNATURE_CHECK (GNULIB_NAMESPACE::feraiseexcept, int, (int));
+#endif
+
+#if GNULIB_TEST_FETESTEXCEPT
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fetestexcept, int, (int));
+#endif
+
+#if GNULIB_TEST_FESETEXCEPT
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fesetexcept, int, (int));
+#endif
+
+#if GNULIB_TEST_FEENABLEEXCEPT
+SIGNATURE_CHECK (GNULIB_NAMESPACE::feenableexcept, int, (int));
+#endif
+
+#if GNULIB_TEST_FEDISABLEEXCEPT
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fedisableexcept, int, (int));
+#endif
+
+#if GNULIB_TEST_FEGETEXCEPT
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fegetexcept, int, (void));
+#endif
+
+#if GNULIB_TEST_FEGETEXCEPTFLAG
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fegetexceptflag, int, (fexcept_t *, int));
+#endif
+
+#if GNULIB_TEST_FESETEXCEPTFLAG
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fesetexceptflag, int, (fexcept_t const *, int));
+#endif
+
+#if GNULIB_TEST_FETESTEXCEPTFLAG
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fetestexceptflag, int, (fexcept_t const *, int));
+#endif
+
+
+int
+main ()
+{
+}