https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99587
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-03-15
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The attribute is ignored because 'a' is exported, so it's retained anyway (but
not marked as SHF_GNU_RETAIN). Not sure what the desired semantics of the
attribute are here.
static tree
handle_retain_attribute (tree *pnode, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree node = *pnode;
if (SUPPORTS_SHF_GNU_RETAIN
&& (TREE_CODE (node) == FUNCTION_DECL
|| (VAR_P (node) && TREE_STATIC (node))))
;
else
{
warning (OPT_Wattributes, "%qE attribute ignored", name);
in particular 'a' is not TREE_STATIC. Maybe !DECL_EXTERNAL was intended here
to ignore it on
extern int a;
?
