uselocale() function

[Marc Baudoin <babafou%babafou.eu.org@localhost>]

Hi,

I'm responsible for building the NetBSD binaries for the TeX Live
distribution.  We're preparing the 2017 release and I have a
problem with the new version of a component (dvisvgm).  It uses a
uselocale() function which doesn't seem to exist in
NetBSD-release.  It's supposed to be part of POSIX :

http://pubs.opengroup.org/onlinepubs/9699919799/functions/uselocale.html

How to handle this? Is there a replacement that could act as this
uselocale() function or emulate it?