[Bug c++/53528] Support C++11 generalized attributes

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53528

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-06-25 
08:32:29 UTC ---
There's no need for an extension, the grammar allows
[[gnu::init_priority(200)]]