ref: 6b1309ac40e3f1842f42b5fbd995b40dbf8e3932 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; }