http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52015
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-02-27 18:06:52 UTC --- PS (note to the library maintainers): if I remember correctly the resolution of some relatively recent DRs, these conversion functions have to do the work in any case in the C locale, thus we'll have to adopt here too the dance used in c_locale.cc / c_locale.h.