realpath
========

POSIX specification: http://www.opengroup.org/susv3xsh/realpath.html

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: mingw, BeOS.

  * This function does not allow to determine the required size of output buffer; PATH_MAX --- if it is defined --- is nothing more than a guess.

Extension: Gnulib provides a module canonicalize-lgpl that defines a function canonicalize_file_name that is like realpath but without size limitations.