Remove a hack for MinGW

CMakeLists.txt

@@ -275,10 +275,11 @@ CHECK_SYMBOL_EXISTS(floorf math.h HAVE_FLOORF)
 IF(HAVE_FENV_H)
     CHECK_SYMBOL_EXISTS(fesetround fenv.h HAVE_FESETROUND)
 ENDIF()
+IF(HAVE_FLOAT_H)
+    CHECK_SYMBOL_EXISTS(_controlfp float.h HAVE__CONTROLFP)
+ENDIF()
 
 CHECK_FUNCTION_EXISTS(strtof HAVE_STRTOF)
-CHECK_FUNCTION_EXISTS(_controlfp HAVE__CONTROLFP)
-
 CHECK_FUNCTION_EXISTS(stat HAVE_STAT)
 CHECK_FUNCTION_EXISTS(strcasecmp HAVE_STRCASECMP)
 IF(NOT HAVE_STRCASECMP)

OpenAL32/Include/alu.h

@@ -9,32 +9,6 @@
 #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>