/* Base 10 logarithmic function.
- Copyright (C) 2012 Free Software Foundation, Inc.
+ Copyright (C) 2012-2013 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
log10 (double x)
#undef log10
{
- /* 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 log10 (x);
}