1 files changed, 32 insertions, 0 deletions
diff --git a/math/test-nan-const.c b/math/test-nan-const.c
new file mode 100644
index 0000000000..f7bba9eeb6
--- /dev/null
+++ b/math/test-nan-const.c
@@ -0,0 +1,32 @@
+/* Test nan functions do not have const attribute.  Bug 23277.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <math.h>
+#include <string.h>
+
+static int
+do_test (void)
+{
+  char buf[2] = { '2', 0 };
+  float a = nanf (buf);
+  buf[0] = '3';
+  float b = nanf (buf);
+  return memcmp (&a, &b, sizeof (float)) == 0;
+}
+
+#include <support/test-driver.c>