https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88144
--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot
com> ---
On Thu, 22 Nov 2018, pinskia at gcc dot gnu.org wrote:
> I think one of the reasons why it has not been removed is there is still code
> out there that uses this syntax.
Including system headers using it (possibly to support both C and C++).
The C99 syntax wasn't supported for C++ at the same time support was added
for C, only in 2011 for GCC 4.7:
2011-07-20 Jason Merrill <ja...@redhat.com>
* parser.c (cp_parser_initializer_list): Handle C99 .id= and [N]=
designated initializer syntax.
* decl.c (check_array_designated_initializer): Add index parm.
(maybe_deduce_size_from_array_init): Pass it.
(reshape_init_array_1): Likewise.
See <https://gcc.gnu.org/ml/gcc-patches/2003-02/msg01150.html> for
discussion of obsoletion (i.e. enabling the pedwarns in question by
default).
