[multiple changes]

2013-01-03  Thomas Quinot  <quinot@adacore.com>

	* gnat_rm.texi, freeze.adb (Check_Component_Storage_Order): Check that
	a record extension has the same scalar storage order as the parent type.

2013-01-03  Thomas Quinot  <quinot@adacore.com>

	* exp_ch4.adb: Add comment.

2013-01-03  Vincent Celier  <celier@adacore.com>

	* prj.adb: Minor spelling error correction in comment.

2013-01-03  Vincent Celier  <celier@adacore.com>

	* gnatcmd.adb (GNATCmd): If a single main has been specified
	as an absolute path, use its simple file name to find specific
	switches, instead of the absolute path.

2013-01-03  Javier Miranda  <miranda@adacore.com>

	* sem_warn.adb (Warn_On_Overlapping_Actuals): For overlapping
	parameters that are record types or array types generate warnings
	only compiling under -gnatw.i
	* opt.ads (Extensions_Allowed): Restore previous documentation.

2013-01-03  Vincent Celier  <celier@adacore.com>

	* prj-conf.adb (Do_Autoconf): If Target is specified in the
	main project, but not on the command line, use the Target in
	the project to invoke gprconfig in auto-configuration.
	* makeutl.ads (Default_Config_Name): New constant String.

2013-01-03  Arnaud Charlet  <charlet@adacore.com>

	* usage.adb: Minor: fix typo in usage.

2013-01-03  Thomas Quinot  <quinot@adacore.com>

	* sem_ch13.adb (Analyze_Record_Representation_Clause): Reject
	an illegal component clause for an inherited component in a
	record extension.

From-SVN: r194849

gcc/ada/ChangeLog

+2013-01-03  Thomas Quinot  <quinot@adacore.com>
+
+	* gnat_rm.texi, freeze.adb (Check_Component_Storage_Order): Check that
+	a record extension has the same scalar storage order as the parent type.
+
+2013-01-03  Thomas Quinot  <quinot@adacore.com>
+
+	* exp_ch4.adb: Add comment.
+
+2013-01-03  Vincent Celier  <celier@adacore.com>
+
+	* prj.adb: Minor spelling error correction in comment.
+
+2013-01-03  Vincent Celier  <celier@adacore.com>
+
+	* gnatcmd.adb (GNATCmd): If a single main has been specified
+	as an absolute path, use its simple file name to find specific
+	switches, instead of the absolute path.
+
+2013-01-03  Javier Miranda  <miranda@adacore.com>
+
+	* sem_warn.adb (Warn_On_Overlapping_Actuals): For overlapping
+	parameters that are record types or array types generate warnings
+	only compiling under -gnatw.i
+	* opt.ads (Extensions_Allowed): Restore previous documentation.
+
+2013-01-03  Vincent Celier  <celier@adacore.com>
+
+	* prj-conf.adb (Do_Autoconf): If Target is specified in the
+	main project, but not on the command line, use the Target in
+	the project to invoke gprconfig in auto-configuration.
+	* makeutl.ads (Default_Config_Name): New constant String.
+
+2013-01-03  Arnaud Charlet  <charlet@adacore.com>
+
+	* usage.adb: Minor: fix typo in usage.
+
+2013-01-03  Thomas Quinot  <quinot@adacore.com>
+
+	* sem_ch13.adb (Analyze_Record_Representation_Clause): Reject
+	an illegal component clause for an inherited component in a
+	record extension.
+
 2013-01-03  Emmanuel Briot  <briot@adacore.com>
 
 	* xref_lib.adb (Parse_Identifier_Info): Fix handling of arrays, which

gcc/ada/exp_ch4.adb

@@ -10693,6 +10693,9 @@ package body Exp_Ch4 is
          then
             return Suitable_Element (Next_Entity (C));
 
+         --  Below test for C /= Original_Record_Component (C) is dubious
+         --  if Typ is a constrained record subtype???
+
          elsif Is_Tagged_Type (Typ)
            and then C /= Original_Record_Component (C)
          then

gcc/ada/freeze.adb

@@ -1094,13 +1094,25 @@ package body Freeze is
                 Attribute_Scalar_Storage_Order);
 
       if Is_Record_Type (Comp_Type) or else Is_Array_Type (Comp_Type) then
-         if No (ADC) then
+         if Present (Comp)
+              and then Chars (Comp) = Name_uParent
+         then
+            if Reverse_Storage_Order (Encl_Type)
+                 /=
+               Reverse_Storage_Order (Comp_Type)
+            then
+               Error_Msg_N
+                 ("record extension must have same scalar storage order as "
+                  & "parent", Err_Node);
+            end if;
+
+         elsif No (ADC) then
             Error_Msg_N ("nested composite must have explicit scalar "
                          & "storage order", Err_Node);
 
          elsif (Reverse_Storage_Order (Encl_Type)
                   /=
-                Reverse_Storage_Order (Etype (Comp_Type)))
+                Reverse_Storage_Order (Comp_Type))
            and then not Comp_Byte_Aligned
          then
             Error_Msg_N

gcc/ada/gnat_rm.texi

@@ -6852,6 +6852,9 @@ This means that if a @code{Scalar_Storage_Order} attribute definition
 clause is not confirming, then the type's @code{Bit_Order} shall be
 specified explicitly and set to the same value.
 
+For a record extension, the derived type shall have the same scalar storage
+order as the parent type.
+
 If a component of @var{S} has itself a record or array type, then it shall also
 have a @code{Scalar_Storage_Order} attribute definition clause. In addition,
 if the component does not start on a byte boundary, then the scalar storage

gcc/ada/gnatcmd.adb

@@ -1999,7 +1999,19 @@ begin
                           In_Arrays => Element.Decl.Arrays,
                           Shared    => Project_Tree.Shared);
                      Name_Len := 0;
-                     Add_Str_To_Name_Buffer (Main.all);
+
+                     --  If the single main has been specified as an absolute
+                     --  path, we use only the simple file name. If the
+                     --  absolute path is incorrect, an error will be reported
+                     --  by the underlying tool and it does not make a
+                     --  difference what switches are used.
+
+                     if Is_Absolute_Path (Main.all) then
+                        Add_Str_To_Name_Buffer (File_Name (Main.all));
+                     else
+                        Add_Str_To_Name_Buffer (Main.all);
+                     end if;
+
                      The_Switches := Prj.Util.Value_Of
                        (Index     => Name_Find,
                         Src_Index => 0,

gcc/ada/makeutl.ads

@@ -44,6 +44,10 @@ package Makeutl is
    type Fail_Proc is access procedure (S : String);
    --  Pointer to procedure which outputs a failure message
 
+   Default_Config_Name : constant String := "default.cgpr";
+   --  Name of the configuration file used by gprbuild and generated by
+   --  gprconfig by default.
+
    On_Windows : constant Boolean := Directory_Separator = '\';
    --  True when on Windows
 

gcc/ada/opt.ads

@@ -563,7 +563,7 @@ package Opt is
    Extensions_Allowed : Boolean := False;
    --  GNAT
    --  Set to True by switch -gnatX if GNAT specific language extensions
-   --  are allowed.
+   --  are allowed. Currently there are no such defined extensions.
 
    type External_Casing_Type is (
      As_Is,       -- External names cased as they appear in the Ada source

gcc/ada/prj-conf.adb

@@ -48,9 +48,6 @@ package body Prj.Conf is
 
    Auto_Cgpr : constant String := "auto.cgpr";
 
-   Default_Name : constant String := "default.cgpr";
-   --  Default configuration file that will be used if found
-
    Config_Project_Env_Var : constant String := "GPR_CONFIG";
    --  Name of the environment variable that provides the name of the
    --  configuration file to use.
@@ -669,7 +666,7 @@ package body Prj.Conf is
                Free (Tmp);
 
                if T'Length = 0 then
-                  return Default_Name;
+                  return Default_Config_Name;
                else
                   return T;
                end if;
@@ -1183,13 +1180,46 @@ package body Prj.Conf is
                Arg_Last := 3;
             else
                if Target_Name = "" then
-                  if At_Least_One_Compiler_Command then
-                     Args (4) := new String'("--target=all");
 
-                  else
-                     Args (4) :=
-                       new String'("--target=" & Normalized_Hostname);
-                  end if;
+                  --  Check if attribute Target is specified in the main
+                  --  project, or in a project it extends. If it is, use this
+                  --  target to invoke gprconfig.
+
+                  declare
+                     Variable : Variable_Value;
+                     Proj : Project_Id;
+                     Tgt_Name : Name_Id := No_Name;
+                  begin
+                     Proj := Project;
+                     Project_Loop :
+                     while Proj /= No_Project loop
+                        Variable :=
+                          Value_Of (Name_Target, Proj.Decl.Attributes, Shared);
+
+                        if Variable /= Nil_Variable_Value and then
+                          not Variable.Default and then
+                          Variable.Value /= No_Name
+                        then
+                           Tgt_Name := Variable.Value;
+                           exit Project_Loop;
+                        end if;
+
+                        Proj := Proj.Extends;
+                     end loop Project_Loop;
+
+                     if Tgt_Name /= No_Name then
+                        Args (4) :=
+                          new String'("--target=" &
+                                      Get_Name_String (Tgt_Name));
+
+                     elsif At_Least_One_Compiler_Command then
+                        Args (4) := new String'("--target=all");
+
+                     else
+                        Args (4) :=
+                          new String'("--target=" & Normalized_Hostname);
+                     end if;
+                  end;
 
                else
                   Args (4) := new String'("--target=" & Target_Name);

gcc/ada/prj.adb

@@ -563,7 +563,7 @@ package body Prj is
            new Ada.Containers.Ordered_Sets (Element_Type => Name_Id);
 
          Seen_Name : Name_Id_Set.Set;
-         --  This set is needed to ensure that we do not haandle the same
+         --  This set is needed to ensure that we do not handle the same
          --  project twice in the context of aggregate libraries.
 
          procedure Recursive_Check

gcc/ada/sem_ch13.adb

@@ -4663,10 +4663,34 @@ package body Sem_Ch13 is
       Ocomp   : Entity_Id;
       Posit   : Uint;
       Rectype : Entity_Id;
+      Recdef  : Node_Id;
+
+      function Is_Inherited (Comp : Entity_Id) return Boolean;
+      --  True if Comp is an inherited component in a record extension
+
+      ------------------
+      -- Is_Inherited --
+      ------------------
+
+      function Is_Inherited (Comp : Entity_Id) return Boolean is
+         Comp_Base : Entity_Id;
+      begin
+         if Ekind (Rectype) = E_Record_Subtype then
+            Comp_Base := Original_Record_Component (Comp);
+         else
+            Comp_Base := Comp;
+         end if;
+         return Comp_Base /= Original_Record_Component (Comp_Base);
+      end Is_Inherited;
+
+      Is_Record_Extension : Boolean;
+      --  True if Rectype is a record extension
 
       CR_Pragma : Node_Id := Empty;
       --  Points to N_Pragma node if Complete_Representation pragma present
 
+   --  Start of processing for Analyze_Record_Representation_Clause
+
    begin
       if Ignore_Rep_Clauses then
          return;
@@ -4706,6 +4730,14 @@ package body Sem_Ch13 is
          return;
       end if;
 
+      --  We know we have a first subtype, now possibly go the the anonymous
+      --  base type to determine whether Rectype is a record extension.
+
+      Recdef := Type_Definition (Declaration_Node (Base_Type (Rectype)));
+      Is_Record_Extension :=
+        Nkind (Recdef) = N_Derived_Type_Definition
+          and then Present (Record_Extension_Part (Recdef));
+
       if Present (Mod_Clause (N)) then
          declare
             Loc     : constant Source_Ptr := Sloc (N);
@@ -4881,6 +4913,11 @@ package body Sem_Ch13 is
                        ("cannot reference discriminant of unchecked union",
                         Component_Name (CC));
 
+                  elsif Is_Record_Extension and then Is_Inherited (Comp) then
+                     Error_Msg_NE
+                       ("component clause not allowed for inherited "
+                        & "component&", CC, Comp);
+
                   elsif Present (Component_Clause (Comp)) then
 
                      --  Diagnose duplicate rep clause, or check consistency
@@ -4908,10 +4945,11 @@ package body Sem_Ch13 is
                               Error_Msg_N
                                 ("component clause inconsistent "
                                  & "with representation of ancestor", CC);
+
                            elsif Warn_On_Redundant_Constructs then
                               Error_Msg_N
-                                ("?r?redundant component clause "
-                                 & "for inherited component!", CC);
+                                ("?r?redundant confirming component clause "
+                                 & "for component!", CC);
                            end if;
                         end;
                      end if;
@@ -7346,7 +7384,7 @@ package body Sem_Ch13 is
       begin
          if Present (CC1) and then Present (CC2) then
 
-            --  Exclude odd case where we have two tag fields in the same
+            --  Exclude odd case where we have two tag components in the same
             --  record, both at location zero. This seems a bit strange, but
             --  it seems to happen in some circumstances, perhaps on an error.
 
@@ -7387,7 +7425,7 @@ package body Sem_Ch13 is
       procedure Find_Component is
 
          procedure Search_Component (R : Entity_Id);
-         --  Search components of R for a match. If found, Comp is set.
+         --  Search components of R for a match. If found, Comp is set
 
          ----------------------
          -- Search_Component --
@@ -7426,8 +7464,8 @@ package body Sem_Ch13 is
 
          Search_Component (Rectype);
 
-         --  If not found, maybe component of base type that is absent from
-         --  statically constrained first subtype.
+         --  If not found, maybe component of base type discriminant that is
+         --  absent from statically constrained first subtype.
 
          if No (Comp) then
             Search_Component (Base_Type (Rectype));
@@ -7555,7 +7593,7 @@ package body Sem_Ch13 is
                  ("bit number out of range of specified size",
                   Last_Bit (CC));
 
-               --  Check for overlap with tag field
+               --  Check for overlap with tag component
 
             else
                if Is_Tagged_Type (Rectype)

gcc/ada/sem_warn.adb

@@ -3293,8 +3293,7 @@ package body Sem_Warn is
       Form1, Form2 : Entity_Id;
 
       function Is_Covered_Formal (Formal : Node_Id) return Boolean;
-      --  Return True if Formal is covered by the Ada 2012 rule. Under -gnatX
-      --  the rule is extended to cover record and array types.
+      --  Return True if Formal is covered by the rule.
 
       function Refer_Same_Object (Act1, Act2 : Node_Id) return Boolean;
       --  Two names are known to refer to the same object if the two names
@@ -3321,24 +3320,12 @@ package body Sem_Warn is
 
       function Is_Covered_Formal (Formal : Node_Id) return Boolean is
       begin
-         --  Ada 2012 rule
-
-         if not Extensions_Allowed then
-            return
-              Ekind_In (Formal, E_Out_Parameter,
-                                E_In_Out_Parameter)
-                and then Is_Elementary_Type (Etype (Formal));
-
-         --  Under -gnatX the rule is extended to cover array and record types
-
-         else
-            return
-              Ekind_In (Formal, E_Out_Parameter,
-                                E_In_Out_Parameter)
-                and then (Is_Elementary_Type (Etype (Formal))
-                            or else Is_Record_Type (Etype (Formal))
-                            or else Is_Array_Type (Etype (Formal)));
-         end if;
+         return
+           Ekind_In (Formal, E_Out_Parameter,
+                             E_In_Out_Parameter)
+             and then (Is_Elementary_Type (Etype (Formal))
+                         or else Is_Record_Type (Etype (Formal))
+                         or else Is_Array_Type (Etype (Formal)));
       end Is_Covered_Formal;
 
    begin
@@ -3360,7 +3347,8 @@ package body Sem_Warn is
       --  there is no other name among the other parameters of mode in out or
       --  out to C that is known to denote the same object (RM 6.4.1(6.15/3))
 
-      --  Under -gnatX the rule is extended to cover array and record types.
+      --  Compiling under -gnatw.i we also report warnings on overlapping
+      --  parameters that are record types or array types.
 
       Form1 := First_Formal (Subp);
       Act1  := First_Actual (N);
@@ -3401,10 +3389,21 @@ package body Sem_Warn is
                   then
                      null;
 
+                  --  Under Ada 2012 we only report warnings on overlapping
+                  --  arrays and record types if compiling under -gnatw.i
+
+                  elsif Ada_Version >= Ada_2012
+                     and then not Is_Elementary_Type (Etype (Form1))
+                     and then not Warn_On_Overlap
+                  then
+                     null;
+
                   --  Here we may need to issue message
 
                   else
-                     Error_Msg_Warn := Ada_Version < Ada_2012;
+                     Error_Msg_Warn :=
+                       Ada_Version < Ada_2012
+                         or else not Is_Elementary_Type (Etype (Form1));
 
                      declare
                         Act  : Node_Id;

gcc/ada/usage.adb

@@ -502,7 +502,7 @@ begin
    Write_Line ("        L*   turn off warnings for missing " &
                                                   "elaboration pragma");
    Write_Line ("        .l   turn on info messages for inherited aspects");
-   Write_Line ("        .L*   turn off info messages for inherited aspects");
+   Write_Line ("        .L*  turn off info messages for inherited aspects");
    Write_Line ("        m+   turn on warnings for variable assigned " &
                                                   "but not read");
    Write_Line ("        M*   turn off warnings for variable assigned " &