1*67e74705SXin Limodule a { header "a.h" } 2*67e74705SXin Limodule b { header "b.h" export a } 3*67e74705SXin Limodule c { header "c.h" export a export b } 4*67e74705SXin Limodule d { header "d.h" } 5