From 7b65fb292af0ae16ef42ff174eb52e7e0d07a839 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 25 Feb 2015 02:25:22 +0000
Subject: complex.c: M_PI in VC

* complex.c (_USE_MATH_DEFINES): needed for M_PI in Microsoft
  Visual C.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49732 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 complex.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'complex.c')

diff --git a/complex.c b/complex.c
index 9e352a8c39..efba0b34e7 100644
--- a/complex.c
+++ b/complex.c
@@ -6,6 +6,10 @@
 */
 
 #include "internal.h"
+#if defined _MSC_VER
+/* Microsoft Visual C does not define M_PI and others by default */
+# define _USE_MATH_DEFINES 1
+#endif
 #include <math.h>
 
 #define NDEBUG
-- 
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