[Bug c++/17519] New: Warning for array of packed non-POD in packed struct

[timb at bluearc dot com]

Compiling this with -Wall:
-----
struct A {
  A();
} __attribute__((packed));

struct B {
  A a[2];
} __attribute__((packed));
-----

gives:
test.cpp:6: warning: ignoring packed attribute on unpacked non-POD field `A B::a[2]'

A non-array packed non-POD member does not produce this warning. There is also
no warning if the packed attribute is removed from B and added to the array
declaration inside, even though declaring it on a struct is meant to be
equivalent to declaring it on each member.

May be related to bug 13983.

-- 
           Summary: Warning for array of packed non-POD in packed struct
           Product: gcc
           Version: 3.4.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: timb at bluearc dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i486-linux
  GCC host triplet: i486-linux
GCC target triplet: i486-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17519