diff -up digikam-5.1.0/core/libs/rawengine/libraw/libraw/libraw_types.h.libraw_endian digikam-5.1.0/core/libs/rawengine/libraw/libraw/libraw_types.h
--- digikam-5.1.0/core/libs/rawengine/libraw/libraw/libraw_types.h.libraw_endian	2016-08-08 12:19:25.000000000 -0500
+++ digikam-5.1.0/core/libs/rawengine/libraw/libraw/libraw_types.h	2016-08-09 09:23:01.387824702 -0500
@@ -612,10 +612,10 @@ typedef struct
 #elif defined(__INTEL__)
 #define LibRawBigEndian 0
 
-#elif defined(_M_IX86)
+#elif defined(_M_IX86) || defined(__i386__)
 #define LibRawBigEndian 0
 
-#elif defined(_M_X64) || defined(__amd64__)
+#elif defined(_M_X64) || defined(__amd64__) || defined(__x86_64__)
 #define LibRawBigEndian 0
 
 #elif defined(__LITTLE_ENDIAN__)
@@ -625,6 +625,13 @@ typedef struct
 #define LibRawBigEndian 1
 #elif defined(_ARM_)
 #define LibRawBigEndian 0
+
+#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define LibRawBigEndian 0
+
+#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define LibRawBigEndian 1
+
 #else
 #ifndef qXCodeRez
 #error Unable to figure out byte order.