X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-math.c;h=aa51f8581a3890389bfeea4c9d2461c6d611908f;hb=85d1b55820e902eaa52df973859282a43ac33530;hp=d78baabcb7bf1acc6acc9a3b0f92079d5429e4ab;hpb=a55c4f872c5004057f01f649978e79bb3e932415;p=gnulib.git

diff --git a/tests/test-math.c b/tests/test-math.c
index d78baabcb..aa51f8581 100644
--- a/tests/test-math.c
+++ b/tests/test-math.c
@@ -1,10 +1,10 @@
 /* Test of <math.h> substitute.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2008 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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 2, or (at your option)
-   any later version.
+   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
@@ -12,8 +12,7 @@
    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, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
@@ -21,8 +20,34 @@
 
 #include <math.h>
 
+#ifndef NAN
+# error NAN should be defined
+choke me
+#endif
+
+#if 0
+/* Check that NAN expands into a constant expression.  */
+static float n = NAN;
+#endif
+
+/* Compare two numbers with ==.
+   This is a separate function because IRIX 6.5 "cc -O" miscompiles an
+   'x == x' test.  */
+static int
+numeric_equal (double x, double y)
+{
+  return x == y;
+}
+
 int
 main ()
 {
+  double d = NAN;
+  double zero = 0.0;
+  if (numeric_equal (d, d))
+    return 1;
+  d = HUGE_VAL;
+  if (!numeric_equal (d, 1.0 / zero))
+    return 1;
   return 0;
 }