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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- M A K E --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2004 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- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- The following package implements the facilities to recursively
-- compile (a la make), bind and/or link a set of sources. This package
-- gives the individual routines for performing such tasks as well as
-- the routine gnatmake below that puts it all together.
with Table;
with Types; use Types;
with GNAT.OS_Lib; use GNAT.OS_Lib;
package Make is
-- The 3 following packages are used to store gcc, gnatbind and gnatbl
-- switches passed on the gnatmake or gnatdist command line.
-- Note that the lower bounds definitely need to be 1 to match the
-- requirement that the argument array prepared for Spawn must have
-- a lower bound of 1.
package Gcc_Switches is new Table.Table (
Table_Component_Type => String_Access,
Table_Index_Type => Integer,
Table_Low_Bound => 1,
Table_Initial => 20,
Table_Increment => 100,
Table_Name => "Make.Gcc_Switches");
package Binder_Switches is new Table.Table (
Table_Component_Type => String_Access,
Table_Index_Type => Integer,
Table_Low_Bound => 1,
Table_Initial => 20,
Table_Increment => 100,
Table_Name => "Make.Binder_Switches");
package Linker_Switches is new Table.Table (
Table_Component_Type => String_Access,
Table_Index_Type => Integer,
Table_Low_Bound => 1,
Table_Initial => 20,
Table_Increment => 100,
Table_Name => "Make.Linker_Switches");
procedure Display_Commands (Display : Boolean := True);
-- The default behavior of Make commands (Compile_Sources, Bind, Link)
-- is to display them on stderr. This behavior can be changed repeatedly
-- by invoking this procedure.
-- If a compilation, bind or link failed one of the following 3 exceptions
-- is raised. These need to be handled by the calling routines.
Compilation_Failed : exception;
-- Raised by Compile_Sources if a compilation failed.
Bind_Failed : exception;
-- Raised by Bind below if the bind failed.
Link_Failed : exception;
-- Raised by Link below if the link failed.
procedure Bind (ALI_File : File_Name_Type; Args : Argument_List);
-- Binds ALI_File. Args are the arguments to pass to the binder.
-- Args must have a lower bound of 1.
procedure Link (ALI_File : File_Name_Type; Args : Argument_List);
-- Links ALI_File. Args are the arguments to pass to the linker.
-- Args must have a lower bound of 1.
procedure Initialize;
-- Performs default and package initialization. Therefore,
-- Compile_Sources can be called by an external unit.
procedure Scan_Make_Arg (Argv : String; And_Save : Boolean);
-- Scan make arguments. Argv is a single argument to be processed.
procedure Extract_Failure
(File : out File_Name_Type;
Unit : out Unit_Name_Type;
Found : out Boolean);
-- Extracts the first failure report from Bad_Compilation table.
procedure Compile_Sources
(Main_Source : File_Name_Type;
Args : Argument_List;
First_Compiled_File : out Name_Id;
Most_Recent_Obj_File : out Name_Id;
Most_Recent_Obj_Stamp : out Time_Stamp_Type;
Main_Unit : out Boolean;
Compilation_Failures : out Natural;
Main_Index : Int := 0;
Check_Readonly_Files : Boolean := False;
Do_Not_Execute : Boolean := False;
Force_Compilations : Boolean := False;
Keep_Going : Boolean := False;
In_Place_Mode : Boolean := False;
Initialize_ALI_Data : Boolean := True;
Max_Process : Positive := 1);
-- Compile_Sources will recursively compile all the sources needed by
-- Main_Source. Before calling this routine make sure Namet has been
-- initialized. This routine can be called repeatedly with different
-- Main_Source file as long as all the source (-I flags), library
-- (-B flags) and ada library (-A flags) search paths between calls are
-- *exactly* the same. The default directory must also be the same.
--
-- Args contains the arguments to use during the compilations.
-- The lower bound of Args must be 1.
--
-- First_Compiled_File is set to the name of the first file that is
-- compiled or that needs to be compiled. This is set to No_Name if no
-- compilations were needed.
--
-- Most_Recent_Obj_File is set to the full name of the most recent
-- object file found when no compilations are needed, that is when
-- First_Compiled_File is set to No_Name. When First_Compiled_File
-- is set then Most_Recent_Obj_File is set to No_Name.
--
-- Most_Recent_Obj_Stamp is the time stamp of Most_Recent_Obj_File.
--
-- Main_Unit is set to True if Main_Source can be a main unit.
-- If Do_Not_Execute is False and First_Compiled_File /= No_Name
-- the value of Main_Unit is always False.
-- Is this used any more??? It is certainly not used by gnatmake???
--
-- Compilation_Failures is a count of compilation failures. This count
-- is used to extract compilation failure reports with Extract_Failure.
--
-- Main_Index, when not zero, is the index of the main unit in source
-- file Main_Source which is a multi-unit source.
-- Zero indicates that Main_Source is a single unit source file.
--
-- Check_Readonly_Files set it to True to compile source files
-- which library files are read-only. When compiling GNAT predefined
-- files the "-gnatg" flag is used.
--
-- Do_Not_Execute set it to True to find out the first source that
-- needs to be recompiled, but without recompiling it. This file is
-- saved in First_Compiled_File.
--
-- Force_Compilations forces all compilations no matter what but
-- recompiles read-only files only if Check_Readonly_Files
-- is set.
--
-- Keep_Going when True keep compiling even in the presence of
-- compilation errors.
--
-- In_Place_Mode when True save library/object files in their object
-- directory if they already exist; otherwise, in the source directory.
--
-- Initialize_ALI_Data set it to True when you want to initialize ALI
-- data-structures. This is what you should do most of the time.
-- (especially the first time around when you call this routine).
-- This parameter is set to False to preserve previously recorded
-- ALI file data.
--
-- Max_Process is the maximum number of processes that should be spawned
-- to carry out compilations.
--
-- Flags in Package Opt Affecting Compile_Sources
-- -----------------------------------------------
--
-- Check_Object_Consistency set it to False to omit all consistency
-- checks between an .ali file and its corresponding object file.
-- When this flag is set to true, every time an .ali is read,
-- package Osint checks that the corresponding object file
-- exists and is more recent than the .ali.
--
-- Use of Name Table Info
-- ----------------------
--
-- All file names manipulated by Compile_Sources are entered into the
-- Names table. The Byte field of a source file is used to mark it.
--
-- Calling Compile_Sources Several Times
-- -------------------------------------
--
-- Upon return from Compile_Sources all the ALI data structures are left
-- intact for further browsing. HOWEVER upon entry to this routine ALI
-- data structures are re-initialized if parameter Initialize_ALI_Data
-- above is set to true. Typically this is what you want the first time
-- you call Compile_Sources. You should not load an ali file, call this
-- routine with flag Initialize_ALI_Data set to True and then expect
-- that ALI information to be around after the call. Note that the first
-- time you call Compile_Sources you better set Initialize_ALI_Data to
-- True unless you have called Initialize_ALI yourself.
--
-- Compile_Sources ALGORITHM : Compile_Sources (Main_Source)
-- -------------------------
--
-- 1. Insert Main_Source in a Queue (Q) and mark it.
--
-- 2. Let unit.adb be the file at the head of the Q. If unit.adb is
-- missing but its corresponding ali file is in an Ada library directory
-- (see below) then, remove unit.adb from the Q and goto step 4.
-- Otherwise, look at the files under the D (dependency) section of
-- unit.ali. If unit.ali does not exist or some of the time stamps do
-- not match, (re)compile unit.adb.
--
-- An Ada library directory is a directory containing Ada specs, ali
-- and object files but no source files for the bodies. An Ada library
-- directory is communicated to gnatmake by means of some switch so that
-- gnatmake can skip the sources whole ali are in that directory.
-- There are two reasons for skipping the sources in this case. Firstly,
-- Ada libraries typically come without full sources but binding and
-- linking against those libraries is still possible. Secondly, it would
-- be very wasteful for gnatmake to systematically check the consistency
-- of every external Ada library used in a program. The binder is
-- already in charge of catching any potential inconsistencies.
--
-- 3. Look into the W section of unit.ali and insert into the Q all
-- unmarked source files. Mark all files newly inserted in the Q.
-- Specifically, assuming that the W section looks like
--
-- W types%s types.adb types.ali
-- W unchecked_deallocation%s
-- W xref_tab%s xref_tab.adb xref_tab.ali
--
-- Then xref_tab.adb and types.adb are inserted in the Q if they are not
-- already marked.
-- Note that there is no file listed under W unchecked_deallocation%s
-- so no generic body should ever be explicitly compiled (unless the
-- Main_Source at the start was a generic body).
--
-- 4. Repeat steps 2 and 3 above until the Q is empty
--
-- Note that the above algorithm works because the units withed in
-- subunits are transitively included in the W section (with section) of
-- the main unit. Likewise the withed units in a generic body needed
-- during a compilation are also transitively included in the W section
-- of the originally compiled file.
procedure Gnatmake;
-- The driver of gnatmake. This routine puts it all together.
-- This utility can be used to automatically (re)compile (using
-- Compile_Sources), bind (using Bind) and link (using Link) a set of
-- ada sources. For more information on gnatmake and its precise usage
-- please refer to the gnat documentation.
--
-- Flags in Package Opt Affecting Gnatmake
-- ---------------------------------------
--
-- Check_Readonly_Files: True when -a present in command line
-- Check_Object_Consistency: Set to True by Gnatmake
-- Compile_Only: True when -c present in command line
-- Force_Compilations: True when -f present in command line
-- Maximum_Processes: Number of processes given by -jnum
-- Keep_Going: True when -k present in command line
-- List_Dependencies: True when -l present in command line
-- Do_Not_Execute True when -n present in command line
-- Quiet_Output: True when -q present in command line
-- Minimal_Recompilation: True when -m present in command line
-- Verbose_Mode: True when -v present in command line
end Make;
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