X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Flogf.c;h=ffa2f0843426b626bf95680caa6c061fd748ebba;hb=43593319b31e6b0175b8eec4433bac744959822d;hp=684e9f31d6a4925682c11dd15de3bc3b82e53065;hpb=54a8ff340a865f5409072565e5b199c4451ea60e;p=gnulib.git

diff --git a/lib/logf.c b/lib/logf.c
index 684e9f31d..ffa2f0843 100644
--- a/lib/logf.c
+++ b/lib/logf.c
@@ -1,5 +1,5 @@
 /* Natural 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
 logf (float x)
+#undef logf
 {
+#if HAVE_LOGF
+  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 logf (x);
+#else
   return (float) log ((double) x);
+#endif
 }