On Tue, 28 Oct 2025, Qing Zhao wrote:
> + if (flag_iso)
> + {
> + error_at (DECL_SOURCE_LOCATION (decl),
> + "%qE attribute is not allowed for a pointer to void"
> + " when GNU extension is not enabled",
> + name);
> + *no_add_attrs = true;
> + }
> + else if (warn_pointer_arith)
> + pedwarn (DECL_SOURCE_LOCATION (decl),
> + OPT_Wpointer_arith,
> + "%qE attribute is used for a pointer to void",
> + name);
counted_by itself is an extension, so I don't think it makes any sense for
flag_iso to affect what cases are accepted, or to produce pedwarns for
certain cases. Rather, just do a warning, not a pedwarn, with
OPT_Wpointer_arith (since it does make sense for -Wpointer-arith to affect
whether this is diagnosed, just not for it to be an error or pedwarn).
--
Joseph S. Myers
[email protected]
