// { dg-do assemble  }// From: Klaus-Georg Adams <Klaus-Georg.Adams@chemie.uni-karlsruhe.de>    extern "C" {typedef struct {int dummy[10];} *GDBM_FILE;extern GDBM_FILE gdbm_open();}typedef struct { int dummy[10]; } *FAIL_FILE;extern FAIL_FILE fail_open(); // { dg-error "" } non-local functiontypedef struct { int dummy[10]; } *SUCCESS_FILE, S;extern SUCCESS_FILE success_open();