Message        <Context> allowing an array element to be a struct
                with a flexible array member is a language extension.

 Description    The C99 standard allows the final element of a struct
                with more than one named member to have incomplete
                array type.  Such a member is called a flexible array
                member.  The standard does not allow such a struct
                (and any union containing, possibly recursively, a
                member that is such a struct) to be an array element.
                Other C compilers may not support this extension.

 User Action    Be aware of this extension if you wish to port the
                code.