From d3fc9c800db36784f1660fa48c8e684a45022527 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Fri, 13 Aug 1993 00:46:48 +0000
Subject: [PATCH] (Flogb): Error at run time if not supported.

---
 src/floatfns.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/floatfns.c b/src/floatfns.c
index 0e9003722d..b51073b296 100644
--- a/src/floatfns.c
+++ b/src/floatfns.c
@@ -647,7 +647,8 @@ This is the same as the exponent of a float.")
     XSET (val, Lisp_Int, exp-1);
   }
 #else
-  Well, what *do* you have?
+  /* Would someone like to write code to emulate logb?  */
+  error ("`logb' not implemented on this operating system");
 #endif
 #endif
 
-- 
2.39.2