http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53631
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> --- Yes, we're well aware of all these problems. What I don't see is anyone proposing any useful solutions. If someone sends a patch to remove the <regex> header *without* removing exported symbols from libstdc++.so I'll happily review it, but I have other things to work on.