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@node towlower
@section @code{towlower}
@findex towlower

POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/towlower.html}

Gnulib module: wctype

Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
IRIX 5.3, Solaris 2.5.1.
@item
This function returns values of which the upper 16 bits are incorrect
on some platforms:
mingw.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
On AIX and Windows platforms, @code{wchar_t} is a 16-bit type and therefore cannot
accommodate all Unicode characters.
@end itemize