PR c++/88261

    PR c++/88261
        PR c++/69338
        PR c++/69696
        PR c++/69697
        * cp-tree.h (LOOKUP_ALLOW_FLEXARRAY_INIT): New flag value.
        * typeck2.c (digest_init_r): Raise an error for non-static
        initialization of a flexible array member.
        (process_init_constructor, massage_init_elt,
        process_init_constructor_array, process_init_constructor_record,
        process_init_constructor_union, process_init_constructor): Add the
        flags parameter and pass it thru.
        (store_init_value): Pass LOOKUP_ALLOW_FLEXARRAY_INIT parameter to
        digest_init_flags for static decls.

gcc/testsuite:
2019-01-07  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR c++/88261
        PR c++/69338
        PR c++/69696
        PR c++/69697
        * gcc.dg/array-6.c: Move from here ...
        * c-c++-common/array-6.c: ... to here and add some more test coverage.
        * g++.dg/pr69338.C: New test.
        * g++.dg/pr69697.C: Likewise.
        * g++.dg/ext/flexary32.C: Likewise.
        * g++.dg/ext/flexary3.C: Adjust test.
        * g++.dg/ext/flexary12.C: Likewise.
        * g++.dg/ext/flexary13.C: Likewise.
        * g++.dg/ext/flexary15.C: Likewise.
        * g++.dg/warn/Wplacement-new-size-1.C: Likewise.
        * g++.dg/warn/Wplacement-new-size-2.C: Likewise.
        * g++.dg/warn/Wplacement-new-size-6.C: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@267653 138bc75d-0d04-0410-961f-82ee72b054a4