1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 with GNAT.Strings; use GNAT.Strings;
29 with Atree; use Atree;
32 with Debug; use Debug;
37 with Hostparm; use Hostparm;
38 with Inline; use Inline;
40 with Lib.Load; use Lib.Load;
42 with Namet; use Namet;
43 with Nlists; use Nlists;
46 with Output; use Output;
53 with Sem_Ch8; use Sem_Ch8;
54 with Sem_Elab; use Sem_Elab;
55 with Sem_Prag; use Sem_Prag;
56 with Sem_Warn; use Sem_Warn;
57 with Sinfo; use Sinfo;
58 with Sinput; use Sinput;
59 with Sinput.L; use Sinput.L;
60 with Tbuild; use Tbuild;
61 with Types; use Types;
64 Config_Pragmas : List_Id;
65 -- Gather configuration pragmas
68 -- Carry out package initializations. These are initializations which
69 -- might logically be performed at elaboration time, were it not for
70 -- the fact that we may be doing things more than once in the big loop
71 -- over files. Like elaboration, the order in which these calls are
72 -- made is in some cases important. For example, Lib cannot be
73 -- initialized until Namet, since it uses names table entries.
84 -- Create package Standard
86 CStand.Create_Standard;
88 -- Check possible symbol definitions specified by -gnateD switches
90 Prepcomp.Process_Command_Line_Symbol_Definitions;
92 -- If -gnatep= was specified, parse the preprocessing data file
94 if Preprocessing_Data_File /= null then
95 Name_Len := Preprocessing_Data_File'Length;
96 Name_Buffer (1 .. Name_Len) := Preprocessing_Data_File.all;
97 Prepcomp.Parse_Preprocessing_Data_File (Name_Find);
99 -- Otherwise, check if there were preprocessing symbols on the command
100 -- line and set preprocessing if there are.
103 Prepcomp.Check_Symbols;
106 -- Now that the preprocessing situation is established, we are able to
107 -- load the main source (this is no longer done by Lib.Load.Initalize).
109 Lib.Load.Load_Main_Source;
111 -- Read and process configuration pragma files if present
114 Save_Style_Check : constant Boolean := Opt.Style_Check;
115 -- Save style check mode so it can be restored later
117 Source_Config_File : Source_File_Index;
118 -- Source reference for -gnatec configuration file
123 -- We always analyze config files with style checks off, since
124 -- we don't want a miscellaneous gnat.adc that is around to
125 -- discombobulate intended -gnatg or -gnaty compilations. We
126 -- also disconnect checking for maximum line length.
128 Opt.Style_Check := False;
129 Style_Check := False;
130 Opt.Max_Line_Length := Int (Column_Number'Last);
132 -- Capture current suppress options, which may get modified
134 Scope_Suppress := Opt.Suppress_Options;
136 -- First deal with gnat.adc file
138 if Opt.Config_File then
139 Name_Buffer (1 .. 8) := "gnat.adc";
141 Source_gnat_adc := Load_Config_File (Name_Enter);
143 if Source_gnat_adc /= No_Source_File then
144 Initialize_Scanner (No_Unit, Source_gnat_adc);
145 Config_Pragmas := Par (Configuration_Pragmas => True);
148 Config_Pragmas := Empty_List;
152 Config_Pragmas := Empty_List;
155 -- Now deal with specified config pragmas files if there are any
157 if Opt.Config_File_Names /= null then
158 for Index in Opt.Config_File_Names'Range loop
159 Name_Len := Config_File_Names (Index)'Length;
160 Name_Buffer (1 .. Name_Len) := Config_File_Names (Index).all;
161 Source_Config_File := Load_Config_File (Name_Enter);
163 if Source_Config_File = No_Source_File then
165 ("cannot find configuration pragmas file ",
166 Config_File_Names (Index).all);
169 Initialize_Scanner (No_Unit, Source_Config_File);
171 (Config_Pragmas, Par (Configuration_Pragmas => True));
175 -- Now analyze all pragmas except those whose analysis must be
176 -- deferred till after the main unit is analyzed.
178 if Config_Pragmas /= Error_List
179 and then Operating_Mode /= Check_Syntax
181 Prag := First (Config_Pragmas);
182 while Present (Prag) loop
183 if not Delay_Config_Pragma_Analyze (Prag) then
184 Analyze_Pragma (Prag);
191 -- Restore style check, but if config file turned on checks, leave on!
193 Opt.Style_Check := Save_Style_Check or Style_Check;
194 Opt.Max_Line_Length := Hostparm.Max_Line_Length;
196 -- Capture any modifications to suppress options from config pragmas
198 Opt.Suppress_Options := Scope_Suppress;
201 -- If there was a -gnatem switch, initialize the mappings of unit names to
202 -- file names and of file names to path names from the mapping file.
204 if Mapping_File_Name /= null then
205 Fmap.Initialize (Mapping_File_Name.all);
208 -- We have now processed the command line switches, and the gnat.adc
209 -- file, so this is the point at which we want to capture the values
210 -- of the configuration switches (see Opt for further details).
212 Opt.Register_Opt_Config_Switches;
214 -- Initialize the scanner. Note that we do this after the call to
215 -- Create_Standard, which uses the scanner in its processing of
216 -- floating-point bounds.
218 Initialize_Scanner (Main_Unit, Source_Index (Main_Unit));
220 -- Output header if in verbose mode or full list mode
222 if Verbose_Mode or Full_List then
225 if Operating_Mode = Generate_Code then
226 Write_Str ("Compiling: ");
228 Write_Str ("Checking: ");
231 Write_Name (Full_File_Name (Current_Source_File));
233 if not Debug_Flag_7 then
234 Write_Str (" (source file time stamp: ");
235 Write_Time_Stamp (Current_Source_File);
242 -- Here we call the parser to parse the compilation unit (or units in
243 -- the check syntax mode, but in that case we won't go on to the
244 -- semantics in any case).
246 Discard_List (Par (Configuration_Pragmas => False));
248 -- The main unit is now loaded, and subunits of it can be loaded,
249 -- without reporting spurious loading circularities.
251 Set_Loading (Main_Unit, False);
253 -- Now that the main unit is installed, we can complete the analysis
254 -- of the pragmas in gnat.adc and the configuration file, that require
255 -- a context for their semantic processing.
257 if Config_Pragmas /= Error_List
258 and then Operating_Mode /= Check_Syntax
260 -- Pragmas that require some semantic activity, such as
261 -- Interrupt_State, cannot be processed until the main unit
262 -- is installed, because they require a compilation unit on
263 -- which to attach with_clauses, etc. So analyze them now.
269 Prag := First (Config_Pragmas);
270 while Present (Prag) loop
271 if Delay_Config_Pragma_Analyze (Prag) then
272 Analyze_Pragma (Prag);
280 -- Now on to the semantics. Skip if in syntax only mode
282 if Operating_Mode /= Check_Syntax then
284 -- Install the configuration pragmas in the tree
286 Set_Config_Pragmas (Aux_Decls_Node (Cunit (Main_Unit)), Config_Pragmas);
288 -- Following steps are skipped if we had a fatal error during parsing
290 if not Fatal_Error (Main_Unit) then
292 -- Reset Operating_Mode to Check_Semantics for subunits. We cannot
293 -- actually generate code for subunits, so we suppress expansion.
294 -- This also corrects certain problems that occur if we try to
295 -- incorporate subunits at a lower level.
297 if Operating_Mode = Generate_Code
298 and then Nkind (Unit (Cunit (Main_Unit))) = N_Subunit
300 Operating_Mode := Check_Semantics;
303 -- Analyze (and possibly expand) main unit
305 Scope_Suppress := Suppress_Options;
306 Semantics (Cunit (Main_Unit));
308 -- Cleanup processing after completing main analysis
310 if Operating_Mode = Generate_Code
311 or else (Operating_Mode = Check_Semantics
317 if Operating_Mode = Generate_Code then
318 if Inline_Processing_Required then
319 Analyze_Inlined_Bodies;
322 -- Remove entities from program that do not have any
323 -- execution time references.
325 if Debug_Flag_UU then
326 Collect_Garbage_Entities;
332 -- List library units if requested
338 -- Output any messages for unreferenced entities
340 Output_Unreferenced_Messages;
341 Sem_Warn.Check_Unused_Withs;
345 -- Qualify all entity names in inner packages, package bodies, etc.,
346 -- except when compiling for the JVM back end, which depends on
347 -- having unqualified names in certain cases and handles the
348 -- generation of qualified names when needed.
351 Exp_Dbug.Qualify_All_Entity_Names;
354 -- Dump the source now. Note that we do this as soon as the analysis
355 -- of the tree is complete, because it is not just a dump in the case
356 -- of -gnatD, where it rewrites all source locations in the tree.
360 -- If a mapping file has been specified by a -gnatem switch, update
361 -- it if there has been some sourcs that were not in the mappings.
363 if Mapping_File_Name /= null then
364 Fmap.Update_Mapping_File (Mapping_File_Name.all);