1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- B A C K _ E N D -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2013, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING3. If not, go to -- 19-- http://www.gnu.org/licenses for a complete copy of the license. -- 20-- -- 21-- GNAT was originally developed by the GNAT team at New York University. -- 22-- Extensive contributions were provided by Ada Core Technologies Inc. -- 23-- -- 24------------------------------------------------------------------------------ 25 26-- Call the back end with all the information needed 27 28package Back_End is 29 30 type Back_End_Mode_Type is ( 31 Generate_Object, 32 -- Full back end operation with object file generation 33 34 Declarations_Only, 35 -- Partial back end operation with no object file generation. In this 36 -- mode the only useful action performed by gigi is to process all 37 -- declarations issuing any error messages (in particular those to 38 -- do with rep clauses), and to back annotate representation info. 39 40 Skip); 41 -- Back end call is skipped (syntax only, or errors found) 42 43 pragma Convention (C, Back_End_Mode_Type); 44 for Back_End_Mode_Type use (0, 1, 2); 45 46 procedure Call_Back_End (Mode : Back_End_Mode_Type); 47 -- Call back end, i.e. make call to driver traversing the tree and 48 -- outputting code. This call is made with all tables locked. The back 49 -- end is responsible for unlocking any tables it may need to change, 50 -- and locking them again before returning. 51 52 procedure Scan_Compiler_Arguments; 53 -- Acquires command-line parameters passed to the compiler and processes 54 -- them. Calls Scan_Front_End_Switches for any front-end switches found. 55 -- 56 -- The processing of arguments is private to the back end, since the way 57 -- of acquiring the arguments as well as the set of allowable back end 58 -- switches is different depending on the particular back end being used. 59 -- 60 -- Any processed switches that influence the result of a compilation must 61 -- be added to the Compilation_Arguments table. 62 -- 63 -- This routine is expected to set the following to True if necessary (the 64 -- default for all of these in Opt is False). 65 -- 66 -- Opt.Suppress_All_Inlining 67 -- Opt.Suppress_Control_Float_Optimizations 68 -- Opt.Generate_SCO 69 -- Opt.Generate_SCO_Instance_Table 70 -- Opt.Stack_Checking_Enabled 71 -- Opt.No_Stdinc 72 -- Opt.No_Stdlib 73 74 procedure Gen_Or_Update_Object_File; 75 -- Is used to generate the object file (if generated directly by gnat1), or 76 -- update it if it has already been generated by the call to Call_Back_End, 77 -- so that its timestamp is updated by the call. 78 -- 79 -- This is a no-op with the gcc back-end (the object file is generated by 80 -- the assembler afterwards), but is needed for back-ends that directly 81 -- generate the final object file (such as the .NET backend) so that the 82 -- object file's timestamp is correct when compared with the corresponding 83 -- ali file by gnatmake. 84 85end Back_End; 86