Are there linux locale functions taking locale_t last arg as in Mac OS X library?

[Larry Evans <cppljevans@suddenlink.net>]

Apple has several locale functions suffixed with _l:

http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/xlocale.3.html#//apple_ref/doc/man/3/xlocale

which take a locale_t as last argument freeing them from dependence
on the LOCALE environment, as is the case with the normal
locale functions (without the _l suffix) (see:

http://www.debian.org/doc/manuals/intro-i18n/ch-locale.en.html )

Is there some gcc library that has these functions for other OS's?

TIA

-Larry