ref: b75c7d2fa8b3f9a8ba96e5a3035efa68b8d8cf85 dir: /tests/cc/execute/0155-struct-compl.c/
extern struct X x; int foo(); int main() { extern struct X x; return &x != 0; } struct X {int v;}; int foo() { x.v = 0; return x.v; }