* Generate top-level Makefiles only in existing directories.

src/backends/ocarina-backends-build_utils.adb

@@ -1387,66 +1387,76 @@ package body Ocarina.Backends.Build_Utils is
          ------------------------------
 
          procedure Generate_System_Instance (E : Node_Id) is
+            Dir_Name : constant Name_Id
+              := Normalize_Name (Name (Identifier (E)));
+
             S : Node_Id;
             Fd : File_Descriptor;
+
          begin
-            --  Create the file
-            Enter_Directory (Normalize_Name (Name (Identifier (E))));
-            Fd := Create_File ("Makefile", Text);
+            if Is_Directory (Get_Name_String (Dir_Name)) then
+               --  Create the file
+               Enter_Directory (Dir_Name);
+               Fd := Create_File ("Makefile", Text);
 
-            Write_Eol;
+               Write_Eol;
 
-            if Fd = Invalid_FD then
-               raise Program_Error;
-            end if;
+               if Fd = Invalid_FD then
+                  raise Program_Error;
+               end if;
 
-            --  Setting the output
+               --  Setting the output
+
+               Set_Output (Fd);
+
+               Write_Line
+                 ("###################################################");
+               Write_Line
+                 ("# This Makefile has been generated automatically  #");
+               Write_Line
+                 ("# by the Ocarina AADL toolsuite.                  #");
+               Write_Line
+                 ("# Do not edit this file, all your changes will    #");
+               Write_Line
+                 ("# be overridden at the next code generation.      #");
+               Write_Line
+                 ("###################################################");
+               Write_Eol;
+
+               Write_Str ("SUBDIRS = ");
+               if not AAU.Is_Empty (Subcomponents (E)) then
+                  S := First_Node (Subcomponents (E));
+
+                  while Present (S) loop
+                     if AAU.Is_Process (Corresponding_Instance (S)) then
+                        Write_Name
+                          (Normalize_Name
+                             (Name (Identifier (S))));
+                        Write_Str (" ");
+                        --  Corresponding_Instance (S)))));
 
-            Set_Output (Fd);
+                     end if;
+                     S := Next_Node (S);
+                  end loop;
+               end if;
+               Write_Eol;
 
-            Write_Line ("###################################################");
-            Write_Line ("# This Makefile has been generated automatically  #");
-            Write_Line ("# by the Ocarina AADL toolsuite.                  #");
-            Write_Line ("# Do not edit this file, all your changes will    #");
-            Write_Line ("# be overridden at the next code generation.      #");
-            Write_Line ("###################################################");
-            Write_Eol;
+               Write_Line ("all:");
+               Write_Line
+                 (ASCII.HT
+                    & "set -e; for d in $(SUBDIRS); do $(MAKE) -C $$d ; done");
 
-            Write_Str ("SUBDIRS = ");
-            if not AAU.Is_Empty (Subcomponents (E)) then
-               S := First_Node (Subcomponents (E));
+               Write_Line ("clean:");
+               Write_Line
+                 (ASCII.HT & " set -e; for d in $(SUBDIRS); do $(MAKE) "
+                    & "clean -C $$d ; done");
 
-               while Present (S) loop
-                  if AAU.Is_Process (Corresponding_Instance (S)) then
-                     Write_Name
-                       (Normalize_Name
-                          (Name (Identifier (S))));
-                     Write_Str (" ");
-                     --  Corresponding_Instance (S)))));
+               --  Close the file
 
-                  end if;
-                  S := Next_Node (S);
-               end loop;
+               Close (Fd);
+               Set_Standard_Output;
+               Leave_Directory;
             end if;
-            Write_Eol;
-
-            Write_Line ("all:");
-            Write_Line
-              (ASCII.HT
-                 & "set -e; for d in $(SUBDIRS); do $(MAKE) -C $$d ; done");
-
-            Write_Line ("clean:");
-            Write_Line
-              (ASCII.HT
-                 &
-                 " set -e; for d in $(SUBDIRS); do $(MAKE) clean -C $$d ; done"
-              );
-
-            --  Close the file
-
-            Close (Fd);
-            Set_Standard_Output;
-            Leave_Directory;
 
             --  Generate the makefiles of all process subcomponents