obj-c/obj-c++: Enable more options in c-family for ObjC/ObjC++

obj-c/obj-c++: Enable more options in c-family for ObjC/ObjC++

On Mon, Oct 13, 2025 at 07:07:01AM +0100, Iain Sandoe wrote:
>       * c.opt: Enable Wignored-attributes for Objective-C and
>       Objective-C++.

I wrote a more complete version of this patch, here is it rebased
on top of your patch.

I see no reason for any of these options to be C C++ only rather than
C ObjC C++ ObjC++, or in some cases C++ only rather than C++ ObjC++.
The only cases where I think limiting to C only is desirable are
fgimple
C Var(flag_gimple) Init(0)
Enable parsing GIMPLE.
where I think we don't want to support ObjC for GIMPLE FE, and
lang-asm
C Undocumented RejectDriver
For everything else I believe people adding those options just didn't
think of ObjC or ObjC++.

2025-10-14  Jakub Jelinek  <jakub@redhat.com>

	* c.opt (Wflex-array-member-not-at-end, Wignored-qualifiers,
	Wopenacc-parallelism, Wstrict-flex-arrays, Wsync-nand,
	fstrict-flex-arrays, fstrict-flex-arrays=): Enable also for ObjC and
	ObjC++ next to C and C++.
	(Wmisleading-indentation, Wopenmp-simd): Likewise.  Also change
	LangEnabledBy from just C C++ to C ObjC C++ ObjC++.
	(Wplacement-new, Wplacement-new=, fcontract-assumption-mode=,
	fcontract-build-level=, fcontract-strict-declarations=,
	fcontract-mode=, fcontract-continuation-mode=, fcontract-role=,
	fcontract-semantic=, fcoroutines, flang-info-include-translate,
	flang-info-include-translate-not, flang-info-include-translate=,
	flang-info-module-cmi, flang-info-module-cmi=): Enable also
	for ObjC++ next to C++.