From 05ca5051e9515239eb320f404a555165d618991c Mon Sep 17 00:00:00 2001
From: "Lubomir I. Ivanov" <neolit123@gmail.com>
Date: Tue, 3 Nov 2015 13:47:28 +0200
Subject: Fix M_PI with -std=c++11 on Mingw

The introduction of -std=c++11 breaks usage of M_PI in Mingw,
but technically M_PI is not standard C or C++.

Defining M_PI in units.h solves the issue.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
---
 subsurface-core/units.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'subsurface-core')

diff --git a/subsurface-core/units.h b/subsurface-core/units.h
index 1273bd9bb..9d1b0fc8c 100644
--- a/subsurface-core/units.h
+++ b/subsurface-core/units.h
@@ -2,6 +2,9 @@
 #define UNITS_H
 
 #include <math.h>
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
 
 #ifdef __cplusplus
 extern "C" {
-- 
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