[multiple changes]

2010-09-10  Emmanuel Briot  <briot@adacore.com>

	* prj-util.adb (Executable_Of): Fix CE when the project does not
	contain a Builder package.

2010-09-10  Vincent Celier  <celier@adacore.com>

	* prj-ext.adb (Initialize_Project_Path): Add <prefix>/lib/gpr/<target>
	to the project path, if Prefix and Target_Name are defined.
	* prj-tree.ads (Project_Node_Tree_Data): New component Target_Name

2010-09-10  Ed Schonberg  <schonberg@adacore.com>

	* checks.adb (Ensure_Valid): If the expression is a boolean expression
	or short-circuit operation, do no emit a validity check: only the
	elementary operands of the expression need checking.

2010-09-10  Ben Brosgol  <brosgol@adacore.com>

	* gnat_rm.texi: Document Short_Descriptors.

2010-09-10  Arnaud Charlet  <charlet@adacore.com>

	* s-taprop-linux.adb, s-taskin.ads (Task_Alternate_Stack): Default
	initialize to Null_Address.
	(Enter_Task): Do not set up an alternate stack for foreign threads.

From-SVN: r164149

gcc/ada/ChangeLog

+2010-09-10  Emmanuel Briot  <briot@adacore.com>
+
+	* prj-util.adb (Executable_Of): Fix CE when the project does not
+	contain a Builder package.
+
+2010-09-10  Vincent Celier  <celier@adacore.com>
+
+	* prj-ext.adb (Initialize_Project_Path): Add <prefix>/lib/gpr/<target>
+	to the project path, if Prefix and Target_Name are defined.
+	* prj-tree.ads (Project_Node_Tree_Data): New component Target_Name
+
+2010-09-10  Ed Schonberg  <schonberg@adacore.com>
+
+	* checks.adb (Ensure_Valid): If the expression is a boolean expression
+	or short-circuit operation, do no emit a validity check: only the
+	elementary operands of the expression need checking.
+
+2010-09-10  Ben Brosgol  <brosgol@adacore.com>
+
+	* gnat_rm.texi: Document Short_Descriptors.
+
+2010-09-10  Arnaud Charlet  <charlet@adacore.com>
+
+	* s-taprop-linux.adb, s-taskin.ads (Task_Alternate_Stack): Default
+	initialize to Null_Address.
+	(Enter_Task): Do not set up an alternate stack for foreign threads.
+
 2010-09-10  Robert Dewar  <dewar@adacore.com>
 
 	* opt.adb (Short_Descriptors): New flag

gcc/ada/checks.adb

@@ -4108,6 +4108,17 @@ package body Checks is
          end if;
       end if;
 
+      --  If this is a boolean expression, only its elementary consituents
+      --  need checking: if they are valid, a boolean or short-circuit
+      --  operation with them will be valid as well.
+
+      if Base_Type (Typ) = Standard_Boolean
+        and then
+          (Nkind (Expr) in N_Op or else Nkind (Expr) in N_Short_Circuit)
+      then
+         return;
+      end if;
+
       --  If we fall through, a validity check is required
 
       Insert_Valid_Check (Expr);

gcc/ada/gnat_rm.texi

@@ -186,6 +186,7 @@ Implementation Defined Pragmas
 * Pragma Restriction_Warnings::
 * Pragma Shared::
 * Pragma Short_Circuit_And_Or::
+* Pragma Short_Descriptors::
 * Pragma Source_File_Name::
 * Pragma Source_File_Name_Project::
 * Pragma Source_Reference::
@@ -803,6 +804,7 @@ consideration, the use of these pragmas should be minimized.
 * Pragma Restriction_Warnings::
 * Pragma Shared::
 * Pragma Short_Circuit_And_Or::
+* Pragma Short_Descriptors::
 * Pragma Source_File_Name::
 * Pragma Source_File_Name_Project::
 * Pragma Source_Reference::
@@ -2208,8 +2210,9 @@ you can construct your own extension unit following the above
 definition.  Note that such a package is a child of @code{System}
 and thus is considered part of the implementation.  To compile
 it you will have to use the appropriate switch for compiling
-system units.  @xref{Top, @value{EDITION} User's Guide, About This
-Guide,, gnat_ugn, @value{EDITION} User's Guide}, for details.
+system units.
+@xref{Top, @value{EDITION} User's Guide, About This Guide, gnat_ugn, @value{EDITION} User's Guide},
+for details.
 
 @node Pragma Extensions_Allowed
 @unnumberedsec Pragma Extensions_Allowed
@@ -3793,7 +3796,7 @@ type Day is (Mon, Tue, Wed, Thu, Fri, Sat, Sun);
 @end smallexample
 
 @noindent
-then the ordering imposed by the language is reasonable, and 
+then the ordering imposed by the language is reasonable, and
 clients can depend on it, writing for example:
 
 @smallexample @c ada
@@ -4430,7 +4433,23 @@ short-circuited logical operators. If this configuration pragma occurs locally
 within the file being compiled, it applies only to the file being compiled.
 There is no requirement that all units in a partition use this option.
 
-semantics are identical to pragma Atomic.
+@node Pragma Short_Descriptors
+@unnumberedsec Pragma Short_Descriptors
+@findex Short_Descriptors
+@noindent
+Syntax:
+
+@smallexample @c ada
+pragma Short_Descriptors
+@end smallexample
+
+@noindent
+In VMS versions of the compiler, this configuration pragma causes all
+occurrences of the mechanism types Descriptor[_xxx] to be treated as
+Short_Descriptor[_xxx]. This is helpful in porting legacy applications from a
+32-bit environment to a 64-bit environment. This pragma is ignored for non-VMS
+versions.
+
 @node Pragma Source_File_Name
 @unnumberedsec Pragma Source_File_Name
 @findex Source_File_Name

gcc/ada/prj-ext.adb

@@ -250,13 +250,21 @@ package body Prj.Ext is
                Prefix := new String'(Executable_Prefix_Path);
 
                if Prefix.all /= "" then
+                  if Tree.Target_Name /= null and then
+                    Tree.Target_Name.all /= ""
+                  then
+                     Add_Str_To_Name_Buffer
+                       (Path_Separator & Prefix.all &
+                        "lib" & Directory_Separator & "gpr" &
+                        Directory_Separator & Tree.Target_Name.all);
+                  end if;
+
                   Add_Str_To_Name_Buffer
                     (Path_Separator & Prefix.all &
                      "share" & Directory_Separator & "gpr");
                   Add_Str_To_Name_Buffer
                     (Path_Separator & Prefix.all &
-                     Directory_Separator & "lib" &
-                     Directory_Separator & "gnat");
+                     "lib" & Directory_Separator & "gnat");
                end if;
 
             else

gcc/ada/prj-tree.ads

@@ -6,7 +6,7 @@
 --                                                                          --
 --                                 S p e c                                  --
 --                                                                          --
---          Copyright (C) 2001-2009, Free Software Foundation, Inc.         --
+--          Copyright (C) 2001-2010, Free Software Foundation, Inc.         --
 --                                                                          --
 -- 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- --
@@ -1470,7 +1470,11 @@ package Prj.Tree is
       --  project-tree specific so that one can load the same tree twice but
       --  have two views of it, for instance.
 
-      Project_Path : String_Access;
+      Target_Name : String_Access := null;
+      --  The target name, if any, specified with the gprbuild or gprclean
+      --  switch --target=.
+
+      Project_Path : String_Access := null;
       --  The project path, manipulated through subprograms in prj-ext.ads.
       --  As a special case, if the first character is '#:" or this variable is
       --  unset, this means that the PATH has not been fully initialized yet

gcc/ada/prj-util.adb

@@ -187,7 +187,7 @@ package body Prj.Util is
             Executable_Extension_On_Target := Saved_EEOT;
             return Result;
 
-         else
+         elsif Builder_Package /= No_Package then
             --  We still want to take into account cases where the suffix is
             --  specified in the project itself, as opposed to the config file.
             --  Unfortunately, when the project was processed, they are both
@@ -208,11 +208,10 @@ package body Prj.Util is
                Result :=  Executable_Name (File);
                Executable_Extension_On_Target := Saved_EEOT;
                return Result;
-
-            else
-               return File;
             end if;
          end if;
+
+         return File;
       end Add_Suffix;
 
    --  Start of processing for Executable_Of

gcc/ada/s-taprop-linux.adb

@@ -6,7 +6,7 @@
 --                                                                          --
 --                                  B o d y                                 --
 --                                                                          --
---         Copyright (C) 1992-2009, Free Software Foundation, Inc.          --
+--         Copyright (C) 1992-2010, Free Software Foundation, Inc.          --
 --                                                                          --
 -- GNARL 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- --
@@ -717,7 +717,9 @@ package body System.Task_Primitives.Operations is
 
       Specific.Set (Self_ID);
 
-      if Use_Alternate_Stack then
+      if Use_Alternate_Stack
+        and then Self_ID.Common.Task_Alternate_Stack /= Null_Address
+      then
          declare
             Stack  : aliased stack_t;
             Result : Interfaces.C.int;

gcc/ada/s-taskin.ads

@@ -523,7 +523,7 @@ package System.Tasking is
       --  Activator writes it, once, before Self starts executing. Thereafter,
       --  Self only reads it.
 
-      Task_Alternate_Stack : System.Address;
+      Task_Alternate_Stack : System.Address := System.Null_Address;
       --  The address of the alternate signal stack for this task, if any
       --
       --  Protection: Only accessed by Self