[Bug bootstrap/52887] Bootstrap on AIX failure: Undefined symbol: .std::function::function(std::function const&)

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52887

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-05-11 
18:34:59 UTC ---
Looks as though it also needs

template class function<bool (__regex::_PatternCursor const&)>;