[multiple changes]

2015-11-18  Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_util.adb (Has_Full_Default_Initialization):
	Perform the test for the presence of pragma
	Default_Initial_Condition prior to the specialized type
	checks. Add a missing case where the lack of a pragma argument
	yields full default initialization.

2015-11-18  Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_res.adb (Resolve_Entity_Name): Do not check
	for elaboration issues when a variable appears as the name of
	an object renaming declaration as this constitutes an aliasing,
	not a read.

2015-11-18  Ed Schonberg  <schonberg@adacore.com>

	* checks.adb (Overlap_Check): An actual that is an aggregate
	cannot overlap with another actual, and no check should be
	generated for it.
	* targparm.ads: Fix typos.

2015-11-18  Pascal Obry  <obry@adacore.com>

	* adaint.c: Routine __gnat_killprocesstree only implemented on
	Linux and Windows.

2015-11-18  Pascal Obry  <obry@adacore.com>

	* g-ctrl_c.adb: Minor style fixes.

From-SVN: r230523

gcc/ada/ChangeLog

+2015-11-18  Hristian Kirtchev  <kirtchev@adacore.com>
+
+	* sem_util.adb (Has_Full_Default_Initialization):
+	Perform the test for the presence of pragma
+	Default_Initial_Condition prior to the specialized type
+	checks. Add a missing case where the lack of a pragma argument
+	yields full default initialization.
+
+2015-11-18  Hristian Kirtchev  <kirtchev@adacore.com>
+
+	* sem_res.adb (Resolve_Entity_Name): Do not check
+	for elaboration issues when a variable appears as the name of
+	an object renaming declaration as this constitutes an aliasing,
+	not a read.
+
+2015-11-18  Ed Schonberg  <schonberg@adacore.com>
+
+	* checks.adb (Overlap_Check): An actual that is an aggregate
+	cannot overlap with another actual, and no check should be
+	generated for it.
+	* targparm.ads: Fix typos.
+
+2015-11-18  Pascal Obry  <obry@adacore.com>
+
+	* adaint.c: Routine __gnat_killprocesstree only implemented on
+	Linux and Windows.
+
+2015-11-18  Pascal Obry  <obry@adacore.com>
+
+	* g-ctrl_c.adb: Minor style fixes.
+
 2015-11-18  Pascal Obry  <obry@adacore.com>
 
 	* adaint.c, s-os_lib.adb, s-os_lib.ads (Kill_Process_Tree): New.

gcc/ada/adaint.c

@@ -3259,7 +3259,11 @@ void __gnat_killprocesstree (int pid, int sig_num)
   /* kill process */
 
   __gnat_kill (pid, sig_num, 1);
-#else
+
+#elif defined (__vxworks)
+  /* not implemented */
+
+#elif defined (__linux__)
   DIR *dir;
   struct dirent *d;
 
@@ -3308,6 +3312,8 @@ void __gnat_killprocesstree (int pid, int sig_num)
   /* kill process */
 
   __gnat_kill (pid, sig_num, 1);
+#else
+  __gnat_kill (pid, sig_num, 1);
 #endif
   /* Note on Solaris it is possible to read /proc/<PID>/status.
      The 5th and 6th words are the pid and the 7th and 8th the ppid.

gcc/ada/checks.adb

@@ -2359,9 +2359,19 @@ package body Checks is
 
          --  Ensure that the actual is an object that is not passed by value.
          --  Elementary types are always passed by value, therefore actuals of
-         --  such types cannot lead to aliasing.
+         --  such types cannot lead to aliasing. An aggregate is an object in
+         --  Ada 2012, but an actual that is an aggregate cannot overlap with
+         --  another actual.
 
-         if Is_Object_Reference (Original_Actual (Actual_1))
+         if Nkind (Original_Actual (Actual_1)) = N_Aggregate
+           or else
+             (Nkind (Original_Actual (Actual_1)) = N_Qualified_Expression
+                and then Nkind (Expression (Original_Actual (Actual_1))) =
+                           N_Aggregate)
+         then
+            null;
+
+         elsif Is_Object_Reference (Original_Actual (Actual_1))
            and then not Is_Elementary_Type (Etype (Original_Actual (Actual_1)))
          then
             Actual_2 := Next_Actual (Actual_1);

gcc/ada/g-ctrl_c.adb

@@ -6,7 +6,7 @@
 --                                                                          --
 --                                 B o d y                                  --
 --                                                                          --
---                      Copyright (C) 2002-2010, AdaCore                    --
+--                      Copyright (C) 2002-2015, AdaCore                    --
 --                                                                          --
 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
 -- terms of the  GNU General Public License as published  by the Free Soft- --
@@ -39,11 +39,19 @@ package body GNAT.Ctrl_C is
    procedure C_Handler;
    pragma Convention (C, C_Handler);
 
+   ---------------
+   -- C_Handler --
+   ---------------
+
    procedure C_Handler is
    begin
       Ada_Handler.all;
    end C_Handler;
 
+   ---------------------
+   -- Install_Handler --
+   ---------------------
+
    procedure Install_Handler (Handler : Handler_Type) is
       procedure Internal (Handler : C_Handler_Type);
       pragma Import (C, Internal, "__gnat_install_int_handler");

gcc/ada/sem_res.adb

@@ -7231,9 +7231,13 @@ package body Sem_Res is
                   & "(SPARK RM 7.1.3(12))", N);
             end if;
 
-            --  Check possible elaboration issues with respect to variables
+            --  Check for possible elaboration issues with respect to reads of
+            --  variables. The act of renaming the variable is not considered a
+            --  read as it simply establishes an alias.
 
-            if Ekind (E) = E_Variable then
+            if Ekind (E) = E_Variable
+              and then Nkind (Par) /= N_Object_Renaming_Declaration
+            then
                Check_Elab_Call (N);
             end if;
          end if;

gcc/ada/sem_util.adb

@@ -8852,9 +8852,41 @@ package body Sem_Util is
    -------------------------------------
 
    function Has_Full_Default_Initialization (Typ : Entity_Id) return Boolean is
+      Arg  : Node_Id;
       Comp : Entity_Id;
+      Prag : Node_Id;
 
    begin
+      --  A private type and its full view is fully default initialized when it
+      --  is subject to pragma Default_Initial_Condition without an argument or
+      --  with a non-null argument. Since any type may act as the full view of
+      --  a private type, this check must be performed prior to the specialized
+      --  tests below.
+
+      if Has_Default_Init_Cond (Typ)
+        or else Has_Inherited_Default_Init_Cond (Typ)
+      then
+         Prag := Get_Pragma (Typ, Pragma_Default_Initial_Condition);
+
+         --  Pragma Default_Initial_Condition must be present if one of the
+         --  related entity flags is set.
+
+         pragma Assert (Present (Prag));
+         Arg := First (Pragma_Argument_Associations (Prag));
+
+         --  A non-null argument guarantees full default initialization
+
+         if Present (Arg) then
+            return Nkind (Arg) /= N_Null;
+
+         --  Otherwise the missing argument defaults the pragma to "True" which
+         --  is considered a non-null argument (see above).
+
+         else
+            return True;
+         end if;
+      end if;
+
       --  A scalar type is fully default initialized if it is subject to aspect
       --  Default_Value.
 
@@ -8911,20 +8943,6 @@ package body Sem_Util is
 
       elsif Is_Task_Type (Typ) then
          return True;
-      end if;
-
-      --  A private type and by extension its full view is fully default
-      --  initialized if it is subject to pragma Default_Initial_Condition
-      --  with a non-null argument or inherits the pragma from a parent type.
-      --  Since any type can act as the full view of a private type, this check
-      --  is separated from the circuitry above.
-
-      if Has_Default_Init_Cond (Typ)
-        or else Has_Inherited_Default_Init_Cond (Typ)
-      then
-         return
-           Nkind (First (Pragma_Argument_Associations (Get_Pragma
-             (Typ, Pragma_Default_Initial_Condition)))) /= N_Null;
 
       --  Otherwise the type is not fully default initialized
 

gcc/ada/targparm.ads

@@ -53,7 +53,7 @@
 --     1. Configuration pragmas, that must appear at the start of the file.
 --        Any such pragmas automatically apply to any unit compiled in the
 --        presence of this system file. Only a limited set of such pragmas
---        may appear as documented in the corresponding section below,
+--        may appear as documented in the corresponding section below.
 
 --     2. Target parameters. These are boolean constants that are defined
 --        in the private part of the package giving fixed information
@@ -107,7 +107,7 @@ package Targparm is
    --  If a pragma Detect_Blocking appears, then the flag Opt.Detect_Blocking
    --  is set to True.
 
-   --  if a pragma Suppress_Exception_Locations appears, then the flag
+   --  If a pragma Suppress_Exception_Locations appears, then the flag
    --  Opt.Exception_Locations_Suppressed is set to True.
 
    --  If a pragma Profile with a valid profile argument appears, then