From a5c02556e69667f897fcf16493e3a0ed14c3d543 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Thu, 27 Oct 2011 21:22:00 -0700
Subject: Add a work-around for cross-compiling with MinGW

---
 OpenAL32/Include/alu.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'OpenAL32/Include')

diff --git a/OpenAL32/Include/alu.h b/OpenAL32/Include/alu.h
index 7ee2aa31..ffc8fa39 100644
--- a/OpenAL32/Include/alu.h
+++ b/OpenAL32/Include/alu.h
@@ -9,6 +9,32 @@
 #include <math.h>
 #ifdef HAVE_FLOAT_H
 #include <float.h>
+/* HACK: Seems cross-compiling with MinGW includes the wrong float.h, which
+ * doesn't define Windows' _controlfp and related macros */
+#if defined(__MINGW32__) && !defined(_RC_CHOP)
+/* Control word masks for unMask */
+#define _MCW_EM         0x0008001F      /* Error masks */
+#define _MCW_IC         0x00040000      /* Infinity */
+#define _MCW_RC         0x00000300      /* Rounding */
+#define _MCW_PC         0x00030000      /* Precision */
+/* Control word values for unNew (use with related unMask above) */
+#define _EM_INVALID     0x00000010
+#define _EM_DENORMAL    0x00080000
+#define _EM_ZERODIVIDE  0x00000008
+#define _EM_OVERFLOW    0x00000004
+#define _EM_UNDERFLOW   0x00000002
+#define _EM_INEXACT     0x00000001
+#define _IC_AFFINE      0x00040000
+#define _IC_PROJECTIVE  0x00000000
+#define _RC_CHOP        0x00000300
+#define _RC_UP          0x00000200
+#define _RC_DOWN        0x00000100
+#define _RC_NEAR        0x00000000
+#define _PC_24          0x00020000
+#define _PC_53          0x00010000
+#define _PC_64          0x00000000
+_CRTIMP unsigned int __cdecl __MINGW_NOTHROW _controlfp (unsigned int unNew, unsigned int unMask);
+#endif
 #endif
 #ifdef HAVE_IEEEFP_H
 #include <ieeefp.h>
-- 
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