From 2d7a4180d3daded26e11db74024dd2fddd760a5b Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Wed, 22 Mar 2017 07:28:25 +0100
Subject: compat/nan: support for mingw-w64 in a hacky way

---
 compat/nan.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'compat/nan.cpp')

diff --git a/compat/nan.cpp b/compat/nan.cpp
index a7b37362..4b99fff3 100644
--- a/compat/nan.cpp
+++ b/compat/nan.cpp
@@ -5,6 +5,20 @@
 #   define my_isnan std::isnan
 #   define my_isinf std::isinf
 extern "C" OPENTRACK_COMPAT_EXPORT __declspec(noinline) bool nanp(double x)
+#elif defined __MINGW32__
+
+int __cdecl my_isnan(double)__asm__("__isnan");
+int __cdecl my_fpclassify(double)__asm__("___fpclassify");
+
+#define FP_NAN          0x0100
+#define FP_NORMAL       0x0400
+#define FP_INFINITE     (FP_NAN | FP_NORMAL)
+#define FP_ZERO         0x4000
+#define FP_SUBNORMAL    (FP_NORMAL | FP_ZERO)
+
+#define my_isinf(x) (my_fpclassify(x) == FP_INFINITE)
+
+extern "C" OPENTRACK_COMPAT_EXPORT bool __attribute__ ((noinline)) nanp(double x)
 #else
 int my_isnan(double)__asm__("isnan");
 int my_isinf(double)__asm__("isinf");
-- 
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