From c9977c0132b2a6a3df994dbdf58c27689658f20f Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Fri, 18 Jul 2014 06:59:26 -0700
Subject: * Makefile (conftest, conftest2): Link math library so we can test
 for math functions.

* arith.c (log2_init): New static function.
(log2, logtwo): New functions.
(l2): New static variable.
(arith_init): Call log2_init.

* configure (lang_flags): Switching _XOPEN_SOURCE
from 500 to 600 to reveal log2.
Adding test for log2.

* eval.c (eval_init): Register log2 intrinsic.

* lib.h (logtwo): Declared.

* txr.1: Documented log2.
---
 lib.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'lib.h')

diff --git a/lib.h b/lib.h
index 81fea9b8..27b5c544 100644
--- a/lib.h
+++ b/lib.h
@@ -544,6 +544,7 @@ val atang(val);
 val atang2(val, val);
 val loga(val);
 val logten(val num);
+val logtwo(val num);
 val expo(val);
 val logand(val, val);
 val logior(val, val);
-- 
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