readdir_r
=========

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/functions/readdir_r.html

Gnulib module: extensions

Portability problems fixed by Gnulib:

  * This function has an incompatible declaration on some platforms: Solaris 11 2011-11 (when _POSIX_PTHREAD_SEMANTICS is not defined).

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: Minix 3.1.8, mingw, MSVC 9, BeOS.

  * On platforms where off_t is a 32-bit type, this function may not work correctly on huge directories larger than 2 GB.  Also, on platforms where ino_t is a 32-bit type, this function may report inode numbers incorrectly.  The fix is to use the AC_SYS_LARGEFILE macro.