Ensure isinff, isinfl, isnanf, and isnanl are defined (Bug 19439)

In ICO C++11 mode ensure that isinff, isinfl, isnanf, and isnanl
are defined.  These functions were accidentally removed from the
header as part of commit d9b965fa56350d6eea9f7f438a0714c7ffbb183f,
but being GNU extensions, they should have been left in place.

1 files changed, 48 insertions, 0 deletions

diff --git a/math/test-math-isinff.cc b/math/test-math-isinff.cc
new file mode 100644
index 0000000000..195d753f0e
--- /dev/null
+++ b/math/test-math-isinff.cc
@@ -0,0 +1,48 @@
+/* Test for bug 19439.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Marek Polacek <polacek@redhat.com>, 2012.
+
+   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/>.  */
+
+#define _GNU_SOURCE 1
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static int
+do_test (void)
+{
+  /* Verify that isinff, isinfl, isnanf, and isnanlf are defined
+     in the header under C++11 and can be called.  Without the
+     header fix this test will not compile.  */
+  if (isinff (1.0f)
+      || !isinff (INFINITY)
+      || isinfl (1.0L)
+      || !isinfl (INFINITY)
+      || isnanf (2.0f)
+      || !isnanf (NAN)
+      || isnanl (2.0L)
+      || !isnanl (NAN))
+    {
+      printf ("FAIL: Failed to call is* functions.\n");
+      exit (1);
+    }
+  printf ("PASS: Able to call isinff, isinfl, isnanf, and isnanl.\n");
+  exit (0);
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"