[Bug c++/50258] [C++0x] -std=gnu++0x should allow in-class initialization of static const floating types without constexpr

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50258

--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> 2011-09-23 
13:07:33 UTC ---
permerror sounds good to me.