Include correct userspace header for endian information
Skip linuxism to fix build on LP64 archs that aren't amd64

Index: src/byteorder.h
--- src/byteorder.h.orig
+++ src/byteorder.h
@@ -36,7 +36,7 @@
 #include <stdint.h>
 
 #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
-#include <machine/endian.h>
+#include <endian.h>
 #if BYTE_ORDER == BIG_ENDIAN
 #define BYTE_ORDER_BIG_ENDIAN
 #endif // BYTE_ORDER == BIG_ENDIAN
@@ -55,9 +55,11 @@ typedef uint64_t subblock;
 #define SWAPPED(x) (x)
 #elif defined( __x86_64__)
 #define SWAPPED(x) ({register uint64_t __out, __in = (x); __asm__("bswap %q0" : "=r"(__out) : "0"(__in)); __out;})
-#else
+#elif defined(LINUX)
 #include <byteswap.h>
 #define SWAPPED(x) bswap_64(x)
+#else
+#define SWAPPED(x) htobe64(x)
 #endif // defined(BYTE_ORDER_BIG_ENDIAN)
 #else
 #define BLOCKSIZE 4