+#ifdef _GNU_SOURCE
+int versionsort(const struct dirent **, const struct dirent **);
+#endif
+
+#ifdef _BSD_SOURCE
+int getdents(int, struct dirent *, size_t);
+#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
+#ifdef _BSD_SOURCE
+#define getdents64 getdents
+#endif
+#endif
+