http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52369
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-02-24 14:17:17 UTC --- With 4.6.2 and -Wall gives the same as 4.7.0: l.cc:4:13: warning: non-static const member 'const int B::v_' in class without a constructor [-Wuninitialized] l.cc: In function 'int main()': l.cc:13:5: warning: unused variable 'd' [-Wunused-variable] 4.5.2 gives the same (except doesn't print the [-W...] info after the warnings)
