+@item
+This function is missing on some platforms:
+MSVC 9.
+@item
+On platforms where @code{off_t} is a 32-bit type, this function may not
+work correctly on huge directories larger than 2 GB. Also, on platforms
+where @code{ino_t} is a 32-bit type, this function may report inode numbers
+incorrectly. (Cf. @code{AC_SYS_LARGEFILE}.)