From 451379c8a3d4afe157bb2519538eac31953d2377 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Janiszewski?=
 <janisozaur@users.noreply.github.com>
Date: Sat, 28 May 2016 13:24:52 +0200
Subject: [PATCH] Handle SDL builds which already have HAVE_MATH_H defined
 (#3765)

ArchLinux's SDL2 build for mingw already has HAVE_MATH_H define, this
fixes warnings I was getting, as they are now upgraded to errors.
---
 src/platform/platform.h | 4 +++-
 src/rct2.h              | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/platform/platform.h b/src/platform/platform.h
index ad73ee361d..dccafe8e92 100644
--- a/src/platform/platform.h
+++ b/src/platform/platform.h
@@ -20,7 +20,9 @@
 #include "../common.h"
 
 #ifdef __WINDOWS__
-#define HAVE_MATH_H
+	#ifndef HAVE_MATH_H
+		#define HAVE_MATH_H
+	#endif
 #endif // __WINDOWS__
 
 #include <SDL.h>
diff --git a/src/rct2.h b/src/rct2.h
index 6b47f4f2ae..ac9c01245e 100644
--- a/src/rct2.h
+++ b/src/rct2.h
@@ -18,6 +18,7 @@
 #define _RCT2_H_
 
 #include <SDL_platform.h>
+#include <SDL_config.h>
 
 #ifndef _USE_MATH_DEFINES
 	#define _USE_MATH_DEFINES