| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- B A C K _ E N D -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2022, 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 3, 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 COPYING3. If not, go to -- |
| -- http://www.gnu.org/licenses for a complete copy of the license. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- Call the back end with all the information needed |
| |
| -- Note: there are multiple bodies/variants of this package, so do not |
| -- modify this spec without coordination. |
| |
| package Back_End is |
| |
| type Back_End_Mode_Type is ( |
| Generate_Object, |
| -- Full back end operation with object file generation |
| |
| Declarations_Only, |
| -- Partial back end operation with no object file generation. In this |
| -- mode the only useful action performed by gigi is to process all |
| -- declarations issuing any error messages (in particular those to |
| -- do with rep clauses), and to back annotate representation info. |
| |
| Skip); |
| -- Back end call is skipped (syntax only, or errors found) |
| |
| pragma Convention (C, Back_End_Mode_Type); |
| for Back_End_Mode_Type use (0, 1, 2); |
| |
| procedure Call_Back_End (Mode : Back_End_Mode_Type); |
| -- Call back end, i.e. make call to driver traversing the tree and |
| -- outputting code. This call is made with all tables locked. The back |
| -- end is responsible for unlocking any tables it may need to change, |
| -- and locking them again before returning. |
| |
| procedure Scan_Compiler_Arguments; |
| -- Acquires command-line parameters passed to the compiler and processes |
| -- them. Calls Scan_Front_End_Switches for any front-end switches found. |
| -- |
| -- The processing of arguments is private to the back end, since the way |
| -- of acquiring the arguments as well as the set of allowable back end |
| -- switches is different depending on the particular back end being used. |
| -- |
| -- Any processed switches that influence the result of a compilation must |
| -- be added to the Compilation_Arguments table. |
| -- |
| -- This routine is expected to set the following to True if necessary (the |
| -- default for all of these in Opt is False). |
| -- |
| -- Opt.Disable_FE_Inline |
| -- Opt.Suppress_Control_Float_Optimizations |
| -- Opt.Generate_SCO |
| -- Opt.Generate_SCO_Instance_Table |
| -- Opt.JSON_Output |
| -- Opt.Stack_Checking_Enabled |
| -- Opt.No_Stdinc |
| -- Opt.No_Stdlib |
| |
| procedure Gen_Or_Update_Object_File; |
| -- Is used to generate the object file (if generated directly by gnat1), or |
| -- update it if it has already been generated by the call to Call_Back_End, |
| -- so that its timestamp is updated by the call. |
| -- |
| -- This is a no-op with the gcc back-end (the object file is generated by |
| -- the assembler afterwards), but is needed for back-ends that directly |
| -- generate the final object file so that the object file's timestamp is |
| -- correct when compared with the corresponding ali file by gnatmake. |
| |
| end Back_End; |
