+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define DT_UNKNOWN 0
+#define DT_FIFO 1
+#define DT_CHR 2
+#define DT_DIR 4
+#define DT_BLK 6
+#define DT_REG 8
+#define DT_LNK 10
+#define DT_SOCK 12
+#define DT_WHT 14
+#define IFTODT(x) ((x)>>12 & 017)
+#define DTTOIF(x) ((x)<<12)
+#endif
+
+#ifdef _GNU_SOURCE
+int versionsort(const struct dirent **, const struct dirent **);
+#endif
+
+#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
+#define dirent64 dirent
+#define readdir64 readdir
+#define readdir64_r readdir_r
+#define scandir64 scandir
+#define alphasort64 alphasort
+#define versionsort64 versionsort
+#define off64_t off_t
+#define ino64_t ino_t
+#endif
+