log-ieee: Work around test failure on NetBSD 5.1 and Solaris 11.

[gnulib.git] / lib / log.c

diff --git a/lib/log.c b/lib/log.c
index 960ec82..4c824d4 100644 (file)
--- a/lib/log.c
+++ b/lib/log.c
@@ -23,9 +23,16 @@ double
 log (double x)
 #undef log
 {
-  /* Work around the OSF/1 5.1 bug.  */
-  if (x == 0.0)
-    /* Return -Infinity.  */
-    return -1.0 / 0.0;
+  if (x <= 0.0)
+    {
+      /* Work around the OSF/1 5.1 bug.  */
+      if (x == 0.0)
+        /* Return -Infinity.  */
+        return -1.0 / 0.0;
+      /* Work around the NetBSD 5.1, Solaris 11 2011-11 bug.  */
+      else /* x < 0.0 */
+        /* Return NaN.  */
+        return 0.0 / 0.0;
+    }
   return log (x);
 }