5 POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/mbrlen.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 HP-UX 11, IRIX 6.5, Solaris 2.6, mingw, Interix 3.5.
16 Portability problems not fixed by Gnulib: