X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Flog10f.c;h=4205a473a1c66b6cb53969fd4edf3426339d9121;hb=c50edd6462eaaae00f8549f9bad99d4e68b94376;hp=ad50c535d74695cdf47f212fb6d8b0583f9264eb;hpb=bb09133116a45861827711f5e8faf2c82b98c552;p=gnulib.git

diff --git a/lib/log10f.c b/lib/log10f.c
index ad50c535d..4205a473a 100644
--- a/lib/log10f.c
+++ b/lib/log10f.c
@@ -1,5 +1,5 @@
 /* Base 10 logarithmic function.
-   Copyright (C) 2011 Free Software Foundation, Inc.
+   Copyright (C) 2011-2013 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
@@ -21,6 +21,22 @@
 
 float
 log10f (float x)
+#undef log10f
 {
+#if HAVE_LOG10F
+  if (x <= 0.0f)
+    {
+      /* Work around the OSF/1 5.1 bug.  */
+      if (x == 0.0f)
+        /* Return -Infinity.  */
+        return -1.0f / 0.0f;
+      /* Work around the NetBSD 5.1 bug.  */
+      else /* x < 0.0 */
+        /* Return NaN.  */
+        return 0.0f / 0.0f;
+    }
+  return log10f (x);
+#else
   return (float) log10 ((double) x);
+#endif
 }