https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128480
Bug ID: 128480
Summary: spurious "ignoring attributes applied to X after
definition" for a btf_type_tag on an aggregate
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c
Assignee: vineetg at gcc dot gnu.org
Reporter: vineetg at gcc dot gnu.org
CC: dfaust at gcc dot gnu.org, jemarch at gcc dot gnu.org
Target Milestone: ---
A btf_type_tag applied to a variant of an aggregate produces a warning the
user cannot act on.
```c
struct mce { int status; };
extern __attribute__((btf_type_tag("percpu"))) __typeof__(struct mce) injectm;
```
$ gcc -c t.c
t.c:3:15: warning: ignoring attributes applied to 'struct mce' after definition
[-Wattributes]
clang accepts the same declaration silently, even under -Wall, and also drops
the tag.
