2009-08-17 Emmanuel Briot <briot@adacore.com>

	* prj-part.adb, prj.adb, prj.ads, prj-nmsc.adb, prj-conf.adb
	(Processing_Flags.Require_Obj_Dirs): new field, which controls whether
	object directories must be present. In the case of gprclean at least,
	these are optional (if they do not exist there is nothing to clean)

From-SVN: r150827

gcc/ada/prj-conf.adb

@@ -29,6 +29,7 @@ with Makeutl;          use Makeutl;
 with MLib.Tgt;
 with Opt;              use Opt;
 with Output;           use Output;
+with Prj.Err;
 with Prj.Part;
 with Prj.PP;
 with Prj.Proc;         use Prj.Proc;
@@ -722,8 +723,17 @@ package body Prj.Conf is
             end if;
 
             if not Is_Directory (Obj_Dir) then
-               raise Invalid_Config
-                 with "object directory " & Obj_Dir & " does not exist";
+               case Flags.Require_Obj_Dirs is
+                  when Error =>
+                     raise Invalid_Config
+                       with "object directory " & Obj_Dir & " does not exist";
+                  when Warning =>
+                     Prj.Err.Error_Msg
+                       (Flags,
+                        "?object directory " & Obj_Dir & " does not exist");
+                  when Silent =>
+                     null;
+               end case;
             end if;
 
             --  Invoke gprconfig

gcc/ada/prj-nmsc.adb

@@ -5148,10 +5148,21 @@ package body Prj.Nmsc is
 
                Err_Vars.Error_Msg_File_1 :=
                  File_Name_Type (Object_Dir.Value);
-               Error_Msg
-                 (Data.Flags,
-                  "object directory { not found",
-                  Project.Location, Project);
+
+               case Data.Flags.Require_Obj_Dirs is
+                  when Error =>
+                     Error_Msg
+                       (Data.Flags,
+                        "object directory { not found",
+                        Project.Location, Project);
+                  when Warning =>
+                     Error_Msg
+                       (Data.Flags,
+                        "?object directory { not found",
+                        Project.Location, Project);
+                  when Silent =>
+                     null;
+               end case;
             end if;
          end if;
 

gcc/ada/prj-part.adb

@@ -583,6 +583,10 @@ package body Prj.Part is
 
          if No (Project) or else Always_Errout_Finalize then
             Prj.Err.Finalize;
+
+            --  Reinitialize to avoid duplicate warnings later on
+
+            Prj.Err.Initialize;
          end if;
       end;
 

gcc/ada/prj.adb

@@ -1189,7 +1189,9 @@ package body Prj is
       Require_Sources_Other_Lang : Boolean := True;
       Allow_Duplicate_Basenames  : Boolean := True;
       Compiler_Driver_Mandatory  : Boolean := False;
-      Error_On_Unknown_Language  : Boolean := True) return Processing_Flags
+      Error_On_Unknown_Language  : Boolean := True;
+      Require_Obj_Dirs           : Error_Warning := Error)
+      return Processing_Flags
    is
    begin
       return Processing_Flags'
@@ -1198,7 +1200,8 @@ package body Prj is
          Require_Sources_Other_Lang => Require_Sources_Other_Lang,
          Allow_Duplicate_Basenames  => Allow_Duplicate_Basenames,
          Error_On_Unknown_Language  => Error_On_Unknown_Language,
-         Compiler_Driver_Mandatory  => Compiler_Driver_Mandatory);
+         Compiler_Driver_Mandatory  => Compiler_Driver_Mandatory,
+         Require_Obj_Dirs           => Require_Obj_Dirs);
    end Create_Flags;
 
 begin

gcc/ada/prj.ads

@@ -1386,7 +1386,9 @@ package Prj is
       Require_Sources_Other_Lang : Boolean := True;
       Allow_Duplicate_Basenames  : Boolean := True;
       Compiler_Driver_Mandatory  : Boolean := False;
-      Error_On_Unknown_Language  : Boolean := True) return Processing_Flags;
+      Error_On_Unknown_Language  : Boolean := True;
+      Require_Obj_Dirs           : Error_Warning := Error)
+      return Processing_Flags;
    --  Function used to create Processing_Flags structure
    --
    --  If Allow_Duplicate_Basenames, then files with the same base names are
@@ -1410,8 +1412,13 @@ package Prj is
    --
    --  If Error_On_Unknown_Language is true, an error is displayed if some of
    --  the source files listed in the project do not match any naming scheme
+   --
+   --  If Require_Obj_Dirs is true, then all object directories must exist
+   --  (possibly after they have been created automatically if the appropriate
+   --  switches were specified), or an error is raised.
 
    Gprbuild_Flags : constant Processing_Flags;
+   Gprclean_Flags : constant Processing_Flags;
    Gnatmake_Flags : constant Processing_Flags;
    --  Flags used by the various tools. They all display the error messages
    --  through Prj.Err.
@@ -1516,6 +1523,7 @@ private
       Allow_Duplicate_Basenames  : Boolean;
       Compiler_Driver_Mandatory  : Boolean;
       Error_On_Unknown_Language  : Boolean;
+      Require_Obj_Dirs           : Error_Warning;
    end record;
 
    Gprbuild_Flags : constant Processing_Flags :=
@@ -1524,7 +1532,17 @@ private
       Require_Sources_Other_Lang => True,
       Allow_Duplicate_Basenames  => False,
       Compiler_Driver_Mandatory  => True,
-      Error_On_Unknown_Language  => True);
+      Error_On_Unknown_Language  => True,
+      Require_Obj_Dirs           => Error);
+
+   Gprclean_Flags : constant Processing_Flags :=
+     (Report_Error               => null,
+      When_No_Sources            => Warning,
+      Require_Sources_Other_Lang => True,
+      Allow_Duplicate_Basenames  => False,
+      Compiler_Driver_Mandatory  => True,
+      Error_On_Unknown_Language  => True,
+      Require_Obj_Dirs           => Warning);
 
    Gnatmake_Flags : constant Processing_Flags :=
      (Report_Error               => null,
@@ -1532,6 +1550,7 @@ private
       Require_Sources_Other_Lang => False,
       Allow_Duplicate_Basenames  => False,
       Compiler_Driver_Mandatory  => False,
-      Error_On_Unknown_Language  => False);
+      Error_On_Unknown_Language  => False,
+      Require_Obj_Dirs           => Error);
 
 end Prj;