[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 #16 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-06-20 
08:50:25 UTC ---
Whether or not it's more correct, the <regex> code is non-functional and so
needing to add symbols to the .so to support broken code noone uses or can use
is rather unfortunate.