1 extern int var; 2 3 struct Struct { 4 Struct *member2; 5 }; 6 7 struct Opaque; 8 9 struct DefinedInOneHeader {}; 10 11 extern "C" { 12 void func(Opaque *, Struct *, DefinedInOneHeader *); 13 void func2(DefinedInOneHeader *); 14 } 15