+#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