+#elif defined(__sun)
+
+#include <endian.h>
+#define exfat_bswap16(x) bswap_16(x)
+#define exfat_bswap32(x) bswap_32(x)
+#define exfat_bswap64(x) bswap_64(x)
+#define EXFAT_BYTE_ORDER __BYTE_ORDER
+#define EXFAT_LITTLE_ENDIAN __LITTLE_ENDIAN
+#define EXFAT_BIG_ENDIAN __BIG_ENDIAN
+