From a5914a83d0a5e04603ebfe2cf7d0956e984d57f2 Mon Sep 17 00:00:00 2001
From: Kimball Thurston <kdt3rd@gmail.com>
Date: Thu, 18 Jul 2019 02:43:43 +1200
Subject: [PATCH] Fixes #95, compilation issue with mingw

The tree now compiles using mingw to compile, tested by cross compiling
for windows from linux

Signed-off-by: Kimball Thurston <kdt3rd@gmail.com>
---
 OpenEXR/IlmImf/ImfSystemSpecific.h | 104 ++++++-----------------------
 OpenEXR/IlmImfTest/bswap_32.h      |   2 +-
 2 files changed, 22 insertions(+), 84 deletions(-)

diff --git a/OpenEXR/IlmImf/ImfSystemSpecific.h b/OpenEXR/IlmImf/ImfSystemSpecific.h
index 80dfe52f51..b34f65da6e 100644
--- a/OpenEXR/IlmImf/ImfSystemSpecific.h
+++ b/OpenEXR/IlmImf/ImfSystemSpecific.h
@@ -51,71 +51,41 @@ static unsigned long* systemEndianCheckPointer = &systemEndianCheckValue;
 static bool GLOBAL_SYSTEM_LITTLE_ENDIAN =
         (*(unsigned char*)systemEndianCheckPointer == 0x78 ? true : false);
 
-
-#ifdef IMF_HAVE_SSE2
-
-#if defined(__GNUC__)
-// Causes issues on certain gcc versions
-//#define EXR_FORCEINLINE inline __attribute__((always_inline))
-#define EXR_FORCEINLINE inline
-#define EXR_RESTRICT __restrict
-
-static void* EXRAllocAligned(size_t size, size_t alignment)
+inline void*
+EXRAllocAligned (size_t size, size_t alignment)
 {
     // GNUC is used for things like mingw to (cross-)compile for windows
 #ifdef _WIN32
-    return _aligned_malloc(size, alignment);
-#else
+    return _aligned_malloc (size, alignment);
+#elif defined(__INTEL_COMPILER) || defined(__ICL) || defined(__ICC) || defined(__ECC)
+    return _mm_malloc (size, alignment);
+#elif defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L)
     void* ptr = 0;
-    posix_memalign(&ptr, alignment, size);
+    posix_memalign (&ptr, alignment, size);
     return ptr;
+#else
+    return malloc(size);
 #endif
 }
 
-
-static void EXRFreeAligned(void* ptr)
+inline void
+EXRFreeAligned (void* ptr)
 {
 #ifdef _WIN32
-    _aligned_free(ptr);
+    _aligned_free (ptr);
+#elif defined(__INTEL_COMPILER) || defined(__ICL) || defined(__ICC) ||         \
+    defined(__ECC)
+    _mm_free (ptr);
 #else
-    free(ptr);
+    free (ptr);
 #endif
 }
 
-#elif defined _MSC_VER
-
-#define EXR_FORCEINLINE __forceinline
-#define EXR_RESTRICT __restrict
-
-static void* EXRAllocAligned(size_t size, size_t alignment)
-{
-    return _aligned_malloc(size, alignment);
-}
-
-
-static void EXRFreeAligned(void* ptr)
-{
-    _aligned_free(ptr);
-}
-
-#elif defined (__INTEL_COMPILER) || \
-        defined(__ICL) || \
-        defined(__ICC) || \
-        defined(__ECC)
-
+#if defined(__GNUC__) || defined(__clang__) || defined(_MSC_VER)
+// Causes issues on certain gcc versions
+//#define EXR_FORCEINLINE inline __attribute__((always_inline))
 #define EXR_FORCEINLINE inline
-#define EXR_RESTRICT restrict
-
-static void* EXRAllocAligned(size_t size, size_t alignment)
-{
-    return _mm_malloc(size, alignment);
-}
-
-
-static void EXRFreeAligned(void* ptr)
-{
-    _mm_free(ptr);
-}
+#define EXR_RESTRICT __restrict
 
 #else
 
@@ -123,39 +93,7 @@ static void EXRFreeAligned(void* ptr)
 #define EXR_FORCEINLINE inline
 #define EXR_RESTRICT
 
-static void* EXRAllocAligned(size_t size, size_t alignment)
-{
-    return malloc(size);
-}
-
-
-static void EXRFreeAligned(void* ptr)
-{
-    free(ptr);
-}
-
-#endif // compiler switch
-
-
-#else // IMF_HAVE_SSE2
-
-
-#define EXR_FORCEINLINE inline
-#define EXR_RESTRICT
-
-static void* EXRAllocAligned(size_t size, size_t alignment)
-{
-    return malloc(size);
-}
-
-
-static void EXRFreeAligned(void* ptr)
-{
-    free(ptr);
-}
-
-
-#endif  // IMF_HAVE_SSE2
+#endif
 
 // 
 // Simple CPUID based runtime detection of various capabilities
diff --git a/OpenEXR/IlmImfTest/bswap_32.h b/OpenEXR/IlmImfTest/bswap_32.h
index 42962629cd..cc7be65c84 100644
--- a/OpenEXR/IlmImfTest/bswap_32.h
+++ b/OpenEXR/IlmImfTest/bswap_32.h
@@ -3,7 +3,7 @@
 // Copyright Contributors to the OpenEXR Project. See LICENSE file for details.
 // 
 
-#ifdef _MSC_VER
+#if defined(_WIN32) || defined(_WIN64)
 #include <stdlib.h>
 #define bswap_32(x) _byteswap_ulong(x)
 #elif defined(__APPLE__)