Index: gdb-8.2/gdb/gnu-nat.h
===================================================================
--- gdb-8.2.orig/gdb/gnu-nat.h
+++ gdb-8.2/gdb/gnu-nat.h
@@ -21,6 +21,8 @@
 
 #include <unistd.h>
 #include <mach.h>
+#include "target.h"
+#include "inf-child.h"
 
 struct inf;
 
@@ -108,6 +110,11 @@ extern int gnu_debug_flag;
 
 struct gnu_nat_target : public inf_child_target
 {
+  /*
+public:
+  gnu_nat_target ();
+  ~gnu_nat_target () override = 0;
+  */
   void attach (const char *, int) override;
   bool attach_no_wait () override
   { return true; }