(logb): Don't declare if hpux.

diff --git a/src/floatfns.c b/src/floatfns.c
index 999d0a86399fa1c1c5cc437a6e0ddccee60cbb63..1b6487afae889c36eb221896cde580e0dc2142ee 100644 (file)
--- a/src/floatfns.c
+++ b/src/floatfns.c
@@ -55,8 +55,10 @@ Lisp_Object Qarith_error;
 
 #include <math.h>
 
+#ifndef hpux
 /* These declarations are omitted on some systems, like Ultrix.  */
 extern double logb ();
+#endif
 
 #if defined(DOMAIN) && defined(SING) && defined(OVERFLOW)
     /* If those are defined, then this is probably a `matherr' machine. */