502 lines
16 KiB
Ada
502 lines
16 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- M L I B . T G T . S P E C I F I C --
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-- (Alpha VMS Version) --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2003-2007, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This is the Alpha VMS version of the body
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with Ada.Characters.Handling; use Ada.Characters.Handling;
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with MLib.Fil;
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with MLib.Utl;
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with MLib.Tgt.VMS;
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pragma Warnings (Off, MLib.Tgt.VMS);
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-- MLib.Tgt.VMS is with'ed only for elaboration purposes
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with Opt; use Opt;
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with Output; use Output;
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with GNAT.Directory_Operations; use GNAT.Directory_Operations;
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with System; use System;
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with System.Case_Util; use System.Case_Util;
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with System.CRTL; use System.CRTL;
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package body MLib.Tgt.Specific is
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-- Non default subprogram. See comment in mlib-tgt.ads.
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procedure Build_Dynamic_Library
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(Ofiles : Argument_List;
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Options : Argument_List;
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Interfaces : Argument_List;
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Lib_Filename : String;
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Lib_Dir : String;
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Symbol_Data : Symbol_Record;
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Driver_Name : Name_Id := No_Name;
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Lib_Version : String := "";
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Auto_Init : Boolean := False);
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-- Local variables
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Empty_Argument_List : aliased Argument_List := (1 .. 0 => null);
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Additional_Objects : Argument_List_Access := Empty_Argument_List'Access;
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-- Used to add the generated auto-init object files for auto-initializing
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-- stand-alone libraries.
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Macro_Name : constant String := "mcr gnu:[bin]gcc -c -x assembler";
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-- The name of the command to invoke the macro-assembler
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VMS_Options : Argument_List := (1 .. 1 => null);
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Gnatsym_Name : constant String := "gnatsym";
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Gnatsym_Path : String_Access;
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Arguments : Argument_List_Access := null;
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Last_Argument : Natural := 0;
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Success : Boolean := False;
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Shared_Libgcc : aliased String := "-shared-libgcc";
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Shared_Libgcc_Switch : constant Argument_List :=
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(1 => Shared_Libgcc'Access);
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---------------------------
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-- Build_Dynamic_Library --
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---------------------------
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procedure Build_Dynamic_Library
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(Ofiles : Argument_List;
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Options : Argument_List;
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Interfaces : Argument_List;
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Lib_Filename : String;
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Lib_Dir : String;
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Symbol_Data : Symbol_Record;
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Driver_Name : Name_Id := No_Name;
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Lib_Version : String := "";
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Auto_Init : Boolean := False)
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is
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Lib_File : constant String :=
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Lib_Dir & Directory_Separator & "lib" &
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Fil.Ext_To (Lib_Filename, DLL_Ext);
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Opts : Argument_List := Options;
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Last_Opt : Natural := Opts'Last;
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Opts2 : Argument_List (Options'Range);
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Last_Opt2 : Natural := Opts2'First - 1;
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Inter : constant Argument_List := Interfaces;
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function Is_Interface (Obj_File : String) return Boolean;
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-- For a Stand-Alone Library, returns True if Obj_File is the object
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-- file name of an interface of the SAL. For other libraries, always
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-- return True.
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function Option_File_Name return String;
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-- Returns Symbol_File, if not empty. Otherwise, returns "symvec.opt"
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function Version_String return String;
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-- Returns Lib_Version if not empty and if Symbol_Data.Symbol_Policy is
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-- not Autonomous, otherwise returns "". When Symbol_Data.Symbol_Policy
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-- is Autonomous, fails gnatmake if Lib_Version is not the image of a
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-- positive number.
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------------------
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-- Is_Interface --
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------------------
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function Is_Interface (Obj_File : String) return Boolean is
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ALI : constant String :=
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Fil.Ext_To
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(Filename => To_Lower (Base_Name (Obj_File)),
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New_Ext => "ali");
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begin
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if Inter'Length = 0 then
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return True;
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elsif ALI'Length > 2 and then
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ALI (ALI'First .. ALI'First + 2) = "b__"
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then
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return True;
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else
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for J in Inter'Range loop
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if Inter (J).all = ALI then
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return True;
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end if;
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end loop;
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return False;
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end if;
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end Is_Interface;
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----------------------
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-- Option_File_Name --
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----------------------
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function Option_File_Name return String is
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begin
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if Symbol_Data.Symbol_File = No_Path then
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return "symvec.opt";
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else
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Get_Name_String (Symbol_Data.Symbol_File);
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To_Lower (Name_Buffer (1 .. Name_Len));
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return Name_Buffer (1 .. Name_Len);
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end if;
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end Option_File_Name;
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--------------------
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-- Version_String --
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--------------------
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function Version_String return String is
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Version : Integer := 0;
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begin
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if Lib_Version = ""
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or else Symbol_Data.Symbol_Policy /= Autonomous
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then
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return "";
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else
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begin
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Version := Integer'Value (Lib_Version);
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if Version <= 0 then
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raise Constraint_Error;
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end if;
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return Lib_Version;
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exception
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when Constraint_Error =>
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Fail ("illegal version """, Lib_Version,
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""" (on VMS version must be a positive number)");
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return "";
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end;
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end if;
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end Version_String;
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---------------------
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-- Local Variables --
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---------------------
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Opt_File_Name : constant String := Option_File_Name;
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Version : constant String := Version_String;
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For_Linker_Opt : String_Access;
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-- Start of processing for Build_Dynamic_Library
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begin
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-- If option file name does not ends with ".opt", append "/OPTIONS"
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-- to its specification for the VMS linker.
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if Opt_File_Name'Length > 4
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and then
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Opt_File_Name (Opt_File_Name'Last - 3 .. Opt_File_Name'Last) = ".opt"
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then
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For_Linker_Opt := new String'("--for-linker=" & Opt_File_Name);
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else
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For_Linker_Opt :=
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new String'("--for-linker=" & Opt_File_Name & "/OPTIONS");
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end if;
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VMS_Options (VMS_Options'First) := For_Linker_Opt;
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for J in Inter'Range loop
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To_Lower (Inter (J).all);
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end loop;
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-- "gnatsym" is necessary for building the option file
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if Gnatsym_Path = null then
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Gnatsym_Path := Locate_Exec_On_Path (Gnatsym_Name);
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if Gnatsym_Path = null then
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Fail (Gnatsym_Name, " not found in path");
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end if;
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end if;
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-- For auto-initialization of a stand-alone library, we create
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-- a macro-assembly file and we invoke the macro-assembler.
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if Auto_Init then
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declare
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Macro_File_Name : constant String := Lib_Filename & "__init.asm";
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Macro_File : File_Descriptor;
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Init_Proc : String := Lib_Filename & "INIT";
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Popen_Result : System.Address;
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Pclose_Result : Integer;
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Len : Natural;
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OK : Boolean := True;
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command : constant String :=
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Macro_Name & " " & Macro_File_Name & ASCII.NUL;
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-- The command to invoke the assembler on the generated auto-init
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-- assembly file.
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mode : constant String := "r" & ASCII.NUL;
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-- The mode for the invocation of Popen
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begin
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To_Upper (Init_Proc);
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if Verbose_Mode then
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Write_Str ("Creating auto-init assembly file """);
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Write_Str (Macro_File_Name);
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Write_Line ("""");
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end if;
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-- Create and write the auto-init assembly file
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declare
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First_Line : constant String :=
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ASCII.HT & ".section LIB$INITIALIZE,GBL,NOWRT" &
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ASCII.LF;
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Second_Line : constant String :=
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ASCII.HT & ".long " & Init_Proc & ASCII.LF;
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-- First and second lines of the auto-init assembly file
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begin
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Macro_File := Create_File (Macro_File_Name, Text);
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OK := Macro_File /= Invalid_FD;
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if OK then
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Len := Write
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(Macro_File, First_Line (First_Line'First)'Address,
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First_Line'Length);
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OK := Len = First_Line'Length;
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end if;
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if OK then
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Len := Write
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(Macro_File, Second_Line (Second_Line'First)'Address,
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Second_Line'Length);
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OK := Len = Second_Line'Length;
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end if;
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if OK then
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Close (Macro_File, OK);
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end if;
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if not OK then
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Fail ("creation of auto-init assembly file """,
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Macro_File_Name, """ failed");
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end if;
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end;
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-- Invoke the macro-assembler
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if Verbose_Mode then
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Write_Str ("Assembling auto-init assembly file """);
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Write_Str (Macro_File_Name);
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Write_Line ("""");
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end if;
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Popen_Result := popen (command (command'First)'Address,
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mode (mode'First)'Address);
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if Popen_Result = Null_Address then
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Fail ("assembly of auto-init assembly file """,
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Macro_File_Name, """ failed");
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end if;
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-- Wait for the end of execution of the macro-assembler
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Pclose_Result := pclose (Popen_Result);
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if Pclose_Result < 0 then
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Fail ("assembly of auto init assembly file """,
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Macro_File_Name, """ failed");
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end if;
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-- Add the generated object file to the list of objects to be
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-- included in the library.
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Additional_Objects :=
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new Argument_List'
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(1 => new String'(Lib_Filename & "__init.obj"));
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end;
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end if;
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-- Allocate the argument list and put the symbol file name, the
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-- reference (if any) and the policy (if not autonomous).
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Arguments := new Argument_List (1 .. Ofiles'Length + 8);
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Last_Argument := 0;
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-- Verbosity
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if Verbose_Mode then
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'("-v");
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end if;
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-- Version number (major ID)
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if Lib_Version /= "" then
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'("-V");
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'(Version);
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end if;
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-- Symbol file
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'("-s");
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'(Opt_File_Name);
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-- Reference Symbol File
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if Symbol_Data.Reference /= No_Path then
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'("-r");
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) :=
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new String'(Get_Name_String (Symbol_Data.Reference));
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end if;
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-- Policy
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case Symbol_Data.Symbol_Policy is
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when Autonomous =>
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null;
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when Compliant =>
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'("-c");
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when Controlled =>
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'("-C");
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when Restricted =>
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'("-R");
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when Direct =>
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'("-D");
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end case;
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-- Add each relevant object file
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for Index in Ofiles'Range loop
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if Is_Interface (Ofiles (Index).all) then
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Last_Argument := Last_Argument + 1;
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Arguments (Last_Argument) := new String'(Ofiles (Index).all);
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end if;
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end loop;
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-- Spawn gnatsym
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Spawn (Program_Name => Gnatsym_Path.all,
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Args => Arguments (1 .. Last_Argument),
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Success => Success);
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if not Success then
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Fail ("unable to create symbol file for library """,
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Lib_Filename, """");
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end if;
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Free (Arguments);
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-- Move all the -l switches from Opts to Opts2
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declare
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Index : Natural := Opts'First;
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Opt : String_Access;
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begin
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while Index <= Last_Opt loop
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Opt := Opts (Index);
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if Opt'Length > 2 and then
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Opt (Opt'First .. Opt'First + 1) = "-l"
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then
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if Index < Last_Opt then
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Opts (Index .. Last_Opt - 1) :=
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Opts (Index + 1 .. Last_Opt);
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end if;
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Last_Opt := Last_Opt - 1;
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Last_Opt2 := Last_Opt2 + 1;
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Opts2 (Last_Opt2) := Opt;
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else
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Index := Index + 1;
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end if;
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end loop;
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end;
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-- Invoke gcc to build the library
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Utl.Gcc
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(Output_File => Lib_File,
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Objects => Ofiles & Additional_Objects.all,
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Options => VMS_Options,
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Options_2 => Shared_Libgcc_Switch &
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Opts (Opts'First .. Last_Opt) &
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Opts2 (Opts2'First .. Last_Opt2),
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Driver_Name => Driver_Name);
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-- The auto-init object file need to be deleted, so that it will not
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-- be included in the library as a regular object file, otherwise
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-- it will be included twice when the library will be built next
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-- time, which may lead to errors.
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if Auto_Init then
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declare
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Auto_Init_Object_File_Name : constant String :=
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Lib_Filename & "__init.obj";
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Disregard : Boolean;
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begin
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if Verbose_Mode then
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Write_Str ("deleting auto-init object file """);
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Write_Str (Auto_Init_Object_File_Name);
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Write_Line ("""");
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end if;
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Delete_File (Auto_Init_Object_File_Name, Success => Disregard);
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end;
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end if;
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end Build_Dynamic_Library;
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-- Package initialization
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begin
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Build_Dynamic_Library_Ptr := Build_Dynamic_Library'Access;
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end MLib.Tgt.Specific;
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