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@node setlocale
@section @code{setlocale}
@findex setlocale
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/setlocale.html}
Gnulib module: setlocale
Portability problems fixed by Gnulib:
@itemize
@item
On Windows platforms (excluding Cygwin), @code{setlocale(@var{category},NULL)}
ignores the environment variables @code{LC_ALL}, @code{@var{category}}, and
@code{LANG}.
@item
On Windows platforms (excluding Cygwin) and Cygwin 1.5.x,
@code{setlocale(LC_ALL,@var{name})} succeeds and sets the LC_CTYPE category to
@samp{C} when it does not support the encoding, instead of failing.
@item
On Windows platforms (excluding Cygwin), @code{setlocale} understands different
locale names, that are not based on ISO 639 language names and ISO 3166 country
names.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
On Cygwin 1.5.x, which doesn't have locales,
@code{setlocale(LC_ALL,NULL)} always returns @code{"C"}.
@item
On Cygwin 1.7.0, only the charset portion of a locale designation is honored.
@end itemize
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