------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- F R O N T E N D -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2005, 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, 51 Franklin Street, Fifth Floor, -- -- Boston, MA 02110-1301, USA. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with GNAT.Strings; use GNAT.Strings; with Atree; use Atree; with Checks; with CStand; with Debug; use Debug; with Elists; with Exp_Dbug; with Fmap; with Fname.UF; with Hostparm; use Hostparm; with Inline; use Inline; with Lib; use Lib; with Lib.Load; use Lib.Load; with Live; use Live; with Namet; use Namet; with Nlists; use Nlists; with Opt; use Opt; with Osint; with Output; use Output; with Par; with Prepcomp; with Rtsfind; with Sprint; with Scn; use Scn; with Sem; use Sem; with Sem_Ch8; use Sem_Ch8; with Sem_Elab; use Sem_Elab; with Sem_Prag; use Sem_Prag; with Sem_Warn; use Sem_Warn; with Sinfo; use Sinfo; with Sinput; use Sinput; with Sinput.L; use Sinput.L; with Tbuild; use Tbuild; with Types; use Types; procedure Frontend is Config_Pragmas : List_Id; -- Gather configuration pragmas begin -- Carry out package initializations. These are initializations which -- might logically be performed at elaboration time, were it not for -- the fact that we may be doing things more than once in the big loop -- over files. Like elaboration, the order in which these calls are -- made is in some cases important. For example, Lib cannot be -- initialized until Namet, since it uses names table entries. Rtsfind.Initialize; Atree.Initialize; Nlists.Initialize; Elists.Initialize; Lib.Load.Initialize; Sem_Ch8.Initialize; Fname.UF.Initialize; Checks.Initialize; -- Create package Standard CStand.Create_Standard; -- Check possible symbol definitions specified by -gnateD switches Prepcomp.Process_Command_Line_Symbol_Definitions; -- If -gnatep= was specified, parse the preprocessing data file if Preprocessing_Data_File /= null then Name_Len := Preprocessing_Data_File'Length; Name_Buffer (1 .. Name_Len) := Preprocessing_Data_File.all; Prepcomp.Parse_Preprocessing_Data_File (Name_Find); -- Otherwise, check if there were preprocessing symbols on the command -- line and set preprocessing if there are. else Prepcomp.Check_Symbols; end if; -- Now that the preprocessing situation is established, we are able to -- load the main source (this is no longer done by Lib.Load.Initalize). Lib.Load.Load_Main_Source; -- Read and process configuration pragma files if present declare Save_Style_Check : constant Boolean := Opt.Style_Check; -- Save style check mode so it can be restored later Source_Config_File : Source_File_Index; -- Source reference for -gnatec configuration file Prag : Node_Id; begin -- We always analyze config files with style checks off, since -- we don't want a miscellaneous gnat.adc that is around to -- discombobulate intended -gnatg or -gnaty compilations. We -- also disconnect checking for maximum line length. Opt.Style_Check := False; Style_Check := False; -- Capture current suppress options, which may get modified Scope_Suppress := Opt.Suppress_Options; -- First deal with gnat.adc file if Opt.Config_File then Name_Buffer (1 .. 8) := "gnat.adc"; Name_Len := 8; Source_gnat_adc := Load_Config_File (Name_Enter); if Source_gnat_adc /= No_Source_File then Initialize_Scanner (No_Unit, Source_gnat_adc); Config_Pragmas := Par (Configuration_Pragmas => True); else Config_Pragmas := Empty_List; end if; else Config_Pragmas := Empty_List; end if; -- Now deal with specified config pragmas files if there are any if Opt.Config_File_Names /= null then for Index in Opt.Config_File_Names'Range loop Name_Len := Config_File_Names (Index)'Length; Name_Buffer (1 .. Name_Len) := Config_File_Names (Index).all; Source_Config_File := Load_Config_File (Name_Enter); if Source_Config_File = No_Source_File then Osint.Fail ("cannot find configuration pragmas file ", Config_File_Names (Index).all); end if; Initialize_Scanner (No_Unit, Source_Config_File); Append_List_To (Config_Pragmas, Par (Configuration_Pragmas => True)); end loop; end if; -- Now analyze all pragmas except those whose analysis must be -- deferred till after the main unit is analyzed. if Config_Pragmas /= Error_List and then Operating_Mode /= Check_Syntax then Prag := First (Config_Pragmas); while Present (Prag) loop if not Delay_Config_Pragma_Analyze (Prag) then Analyze_Pragma (Prag); end if; Next (Prag); end loop; end if; -- Restore style check, but if config file turned on checks, leave on! Opt.Style_Check := Save_Style_Check or Style_Check; -- Capture any modifications to suppress options from config pragmas Opt.Suppress_Options := Scope_Suppress; end; -- If there was a -gnatem switch, initialize the mappings of unit names to -- file names and of file names to path names from the mapping file. if Mapping_File_Name /= null then Fmap.Initialize (Mapping_File_Name.all); end if; -- We have now processed the command line switches, and the gnat.adc -- file, so this is the point at which we want to capture the values -- of the configuration switches (see Opt for further details). Opt.Register_Opt_Config_Switches; -- Initialize the scanner. Note that we do this after the call to -- Create_Standard, which uses the scanner in its processing of -- floating-point bounds. Initialize_Scanner (Main_Unit, Source_Index (Main_Unit)); -- Output header if in verbose mode or full list mode if Verbose_Mode or Full_List then Write_Eol; if Operating_Mode = Generate_Code then Write_Str ("Compiling: "); else Write_Str ("Checking: "); end if; Write_Name (Full_File_Name (Current_Source_File)); if not Debug_Flag_7 then Write_Str (" (source file time stamp: "); Write_Time_Stamp (Current_Source_File); Write_Char (')'); end if; Write_Eol; end if; -- Here we call the parser to parse the compilation unit (or units in -- the check syntax mode, but in that case we won't go on to the -- semantics in any case). Discard_List (Par (Configuration_Pragmas => False)); -- The main unit is now loaded, and subunits of it can be loaded, -- without reporting spurious loading circularities. Set_Loading (Main_Unit, False); -- Now that the main unit is installed, we can complete the analysis -- of the pragmas in gnat.adc and the configuration file, that require -- a context for their semantic processing. if Config_Pragmas /= Error_List and then Operating_Mode /= Check_Syntax then -- Pragmas that require some semantic activity, such as -- Interrupt_State, cannot be processed until the main unit -- is installed, because they require a compilation unit on -- which to attach with_clauses, etc. So analyze them now. declare Prag : Node_Id; begin Prag := First (Config_Pragmas); while Present (Prag) loop if Delay_Config_Pragma_Analyze (Prag) then Analyze_Pragma (Prag); end if; Next (Prag); end loop; end; end if; -- Now on to the semantics. Skip if in syntax only mode if Operating_Mode /= Check_Syntax then -- Install the configuration pragmas in the tree Set_Config_Pragmas (Aux_Decls_Node (Cunit (Main_Unit)), Config_Pragmas); -- Following steps are skipped if we had a fatal error during parsing if not Fatal_Error (Main_Unit) then -- Reset Operating_Mode to Check_Semantics for subunits. We cannot -- actually generate code for subunits, so we suppress expansion. -- This also corrects certain problems that occur if we try to -- incorporate subunits at a lower level. if Operating_Mode = Generate_Code and then Nkind (Unit (Cunit (Main_Unit))) = N_Subunit then Operating_Mode := Check_Semantics; end if; -- Analyze (and possibly expand) main unit Scope_Suppress := Suppress_Options; Semantics (Cunit (Main_Unit)); -- Cleanup processing after completing main analysis if Operating_Mode = Generate_Code or else (Operating_Mode = Check_Semantics and then ASIS_Mode) then Instantiate_Bodies; end if; if Operating_Mode = Generate_Code then if Inline_Processing_Required then Analyze_Inlined_Bodies; end if; -- Remove entities from program that do not have any -- execution time references. if Debug_Flag_UU then Collect_Garbage_Entities; end if; Check_Elab_Calls; end if; -- List library units if requested if List_Units then Lib.List; end if; -- Output any messages for unreferenced entities Output_Unreferenced_Messages; Sem_Warn.Check_Unused_Withs; end if; end if; -- Qualify all entity names in inner packages, package bodies, etc., -- except when compiling for the JVM back end, which depends on -- having unqualified names in certain cases and handles the -- generation of qualified names when needed. if not Java_VM then Exp_Dbug.Qualify_All_Entity_Names; end if; -- Dump the source now. Note that we do this as soon as the analysis -- of the tree is complete, because it is not just a dump in the case -- of -gnatD, where it rewrites all source locations in the tree. Sprint.Source_Dump; -- If a mapping file has been specified by a -gnatem switch, update -- it if there has been some sourcs that were not in the mappings. if Mapping_File_Name /= null then Fmap.Update_Mapping_File (Mapping_File_Name.all); end if; return; end Frontend;