https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115574
Bug ID: 115574
Summary: [OpenMP] Nested C function – 'declare target
link(var)' leads to "referenced in offloaded code but
hasn't been marked to be included in the offloaded
code"
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: openmp, rejects-valid
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
C variant for the issue PR 115559.
[Nested functions are a GNU extension - thus, we may decide not to fix this.]
Nonetheless, the following compiles but fails during device LTO:
foo.c:2:13: error: variable 'a' has been referenced in offloaded code but
hasn't been marked to be included in the offloaded code
2 | static int a, b[5];
| ^
foo.c:2:16: error: variable 'b' has been referenced in offloaded code but
hasn't been marked to be included in the offloaded code
2 | static int a, b[5];
void f() {
static int a, b[5];
#pragma declare target link(a,b)
void g() { a = 7; b[3] = 3; }
// #pragma omp declare target enter(g)
#pragma omp target map(tofrom: a, b)
g();
}
The problem is the global-var check in c/c-parser.cc (and cp/parser.cc):
id = get_identifier ("omp declare target link");
std::swap (at1, at2);
}
...
if (!at1)
{
DECL_ATTRIBUTES (t) = tree_cons (id, NULL_TREE, DECL_ATTRIBUTES (t));
if (TREE_CODE (t) != FUNCTION_DECL && !is_global_var (t))
continue;
symtab_node *node = symtab_node::get (t);
if (node != NULL)
{
node->offloadable = 1;
...
vec_safe_push (offload_vars, t);
As neither is a global var, it is not added.
