|
111
|
1 ------------------------------------------------------------------------------
|
|
|
2 -- --
|
|
|
3 -- GNAT COMPILER COMPONENTS --
|
|
|
4 -- --
|
|
|
5 -- L I B . L O A D --
|
|
|
6 -- --
|
|
|
7 -- B o d y --
|
|
|
8 -- --
|
|
131
|
9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
|
|
111
|
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 with Atree; use Atree;
|
|
|
27 with Debug; use Debug;
|
|
|
28 with Einfo; use Einfo;
|
|
|
29 with Errout; use Errout;
|
|
|
30 with Fname; use Fname;
|
|
|
31 with Fname.UF; use Fname.UF;
|
|
|
32 with Nlists; use Nlists;
|
|
|
33 with Nmake; use Nmake;
|
|
|
34 with Opt; use Opt;
|
|
|
35 with Osint; use Osint;
|
|
|
36 with Osint.C; use Osint.C;
|
|
|
37 with Output; use Output;
|
|
|
38 with Par;
|
|
|
39 with Restrict; use Restrict;
|
|
|
40 with Scn; use Scn;
|
|
|
41 with Sinfo; use Sinfo;
|
|
|
42 with Sinput; use Sinput;
|
|
|
43 with Sinput.L; use Sinput.L;
|
|
|
44 with Stand; use Stand;
|
|
|
45 with Tbuild; use Tbuild;
|
|
|
46 with Uname; use Uname;
|
|
|
47
|
|
|
48 package body Lib.Load is
|
|
|
49
|
|
|
50 -----------------------
|
|
|
51 -- Local Subprograms --
|
|
|
52 -----------------------
|
|
|
53
|
|
|
54 function From_Limited_With_Chain return Boolean;
|
|
|
55 -- Check whether a possible circular dependence includes units that
|
|
|
56 -- have been loaded through limited_with clauses, in which case there
|
|
|
57 -- is no real circularity.
|
|
|
58
|
|
|
59 function Spec_Is_Irrelevant
|
|
|
60 (Spec_Unit : Unit_Number_Type;
|
|
|
61 Body_Unit : Unit_Number_Type) return Boolean;
|
|
|
62 -- The Spec_Unit and Body_Unit parameters are the unit numbers of the
|
|
|
63 -- spec file that corresponds to the main unit which is a body. This
|
|
|
64 -- function determines if the spec file is irrelevant and will be
|
|
|
65 -- overridden by the body as described in RM 10.1.4(4). See description
|
|
|
66 -- in "Special Handling of Subprogram Bodies" for further details.
|
|
|
67
|
|
|
68 procedure Write_Dependency_Chain;
|
|
|
69 -- This procedure is used to generate error message info lines that
|
|
|
70 -- trace the current dependency chain when a load error occurs.
|
|
|
71
|
|
|
72 ------------------------------
|
|
|
73 -- Change_Main_Unit_To_Spec --
|
|
|
74 ------------------------------
|
|
|
75
|
|
|
76 procedure Change_Main_Unit_To_Spec is
|
|
|
77 U : Unit_Record renames Units.Table (Main_Unit);
|
|
|
78 N : File_Name_Type;
|
|
|
79 X : Source_File_Index;
|
|
|
80
|
|
|
81 begin
|
|
|
82 -- Get name of unit body
|
|
|
83
|
|
|
84 Get_Name_String (U.Unit_File_Name);
|
|
|
85
|
|
|
86 -- Note: for the following we should really generalize and consult the
|
|
|
87 -- file name pattern data, but for now we just deal with the common
|
|
|
88 -- naming cases, which is probably good enough in practice ???
|
|
|
89
|
|
|
90 -- Change .adb to .ads
|
|
|
91
|
|
|
92 if Name_Len >= 5
|
|
|
93 and then Name_Buffer (Name_Len - 3 .. Name_Len) = ".adb"
|
|
|
94 then
|
|
|
95 Name_Buffer (Name_Len) := 's';
|
|
|
96
|
|
|
97 -- Change .2.ada to .1.ada (Rational convention)
|
|
|
98
|
|
|
99 elsif Name_Len >= 7
|
|
|
100 and then Name_Buffer (Name_Len - 5 .. Name_Len) = ".2.ada"
|
|
|
101 then
|
|
|
102 Name_Buffer (Name_Len - 4) := '1';
|
|
|
103
|
|
|
104 -- Change .ada to _.ada (DEC convention)
|
|
|
105
|
|
|
106 elsif Name_Len >= 5
|
|
|
107 and then Name_Buffer (Name_Len - 3 .. Name_Len) = ".ada"
|
|
|
108 then
|
|
|
109 Name_Buffer (Name_Len - 3 .. Name_Len + 1) := "_.ada";
|
|
|
110 Name_Len := Name_Len + 1;
|
|
|
111
|
|
|
112 -- No match, don't make the change
|
|
|
113
|
|
|
114 else
|
|
|
115 return;
|
|
|
116 end if;
|
|
|
117
|
|
|
118 -- Try loading the spec
|
|
|
119
|
|
|
120 N := Name_Find;
|
|
|
121 X := Load_Source_File (N);
|
|
|
122
|
|
|
123 -- No change if we did not find the spec
|
|
|
124
|
|
|
125 if X <= No_Source_File then
|
|
|
126 return;
|
|
|
127 end if;
|
|
|
128
|
|
|
129 -- Otherwise modify Main_Unit entry to point to spec
|
|
|
130
|
|
|
131 U.Unit_File_Name := N;
|
|
|
132 U.Source_Index := X;
|
|
|
133 end Change_Main_Unit_To_Spec;
|
|
|
134
|
|
|
135 -------------------------------
|
|
|
136 -- Create_Dummy_Package_Unit --
|
|
|
137 -------------------------------
|
|
|
138
|
|
|
139 function Create_Dummy_Package_Unit
|
|
|
140 (With_Node : Node_Id;
|
|
|
141 Spec_Name : Unit_Name_Type) return Unit_Number_Type
|
|
|
142 is
|
|
|
143 Unum : Unit_Number_Type;
|
|
|
144 Cunit_Entity : Entity_Id;
|
|
|
145 Cunit : Node_Id;
|
|
|
146 Du_Name : Node_Or_Entity_Id;
|
|
|
147 End_Lab : Node_Id;
|
|
|
148 Fname : constant File_Name_Type :=
|
|
|
149 Get_File_Name (Spec_Name, Subunit => False);
|
|
|
150 Pre_Name : constant Boolean :=
|
|
|
151 Is_Predefined_File_Name (Fname, Renamings_Included => False);
|
|
|
152 Ren_Name : constant Boolean :=
|
|
|
153 Is_Predefined_Renaming_File_Name (Fname);
|
|
|
154 GNAT_Name : constant Boolean :=
|
|
|
155 Is_GNAT_File_Name (Fname);
|
|
|
156 Save_CS : constant Boolean := Get_Comes_From_Source_Default;
|
|
|
157
|
|
|
158 begin
|
|
|
159 -- The created dummy package unit does not come from source
|
|
|
160
|
|
|
161 Set_Comes_From_Source_Default (False);
|
|
|
162
|
|
|
163 -- Normal package
|
|
|
164
|
|
|
165 if Nkind (Name (With_Node)) = N_Identifier then
|
|
|
166 Cunit_Entity :=
|
|
|
167 Make_Defining_Identifier (No_Location,
|
|
|
168 Chars => Chars (Name (With_Node)));
|
|
|
169 Du_Name := Cunit_Entity;
|
|
|
170 End_Lab := New_Occurrence_Of (Cunit_Entity, No_Location);
|
|
|
171
|
|
|
172 -- Child package
|
|
|
173
|
|
|
174 else
|
|
|
175 Cunit_Entity :=
|
|
|
176 Make_Defining_Identifier (No_Location,
|
|
|
177 Chars => Chars (Selector_Name (Name (With_Node))));
|
|
|
178 Du_Name :=
|
|
|
179 Make_Defining_Program_Unit_Name (No_Location,
|
|
|
180 Name => Copy_Separate_Tree (Prefix (Name (With_Node))),
|
|
|
181 Defining_Identifier => Cunit_Entity);
|
|
|
182
|
|
|
183 Set_Is_Child_Unit (Cunit_Entity);
|
|
|
184
|
|
|
185 End_Lab :=
|
|
|
186 Make_Designator (No_Location,
|
|
|
187 Name => Copy_Separate_Tree (Prefix (Name (With_Node))),
|
|
|
188 Identifier => New_Occurrence_Of (Cunit_Entity, No_Location));
|
|
|
189 end if;
|
|
|
190
|
|
|
191 Set_Scope (Cunit_Entity, Standard_Standard);
|
|
|
192
|
|
|
193 Cunit :=
|
|
|
194 Make_Compilation_Unit (No_Location,
|
|
|
195 Context_Items => Empty_List,
|
|
|
196 Unit =>
|
|
|
197 Make_Package_Declaration (No_Location,
|
|
|
198 Specification =>
|
|
|
199 Make_Package_Specification (No_Location,
|
|
|
200 Defining_Unit_Name => Du_Name,
|
|
|
201 Visible_Declarations => Empty_List,
|
|
|
202 End_Label => End_Lab)),
|
|
|
203 Aux_Decls_Node =>
|
|
|
204 Make_Compilation_Unit_Aux (No_Location));
|
|
|
205
|
|
|
206 -- Mark the dummy package as analyzed to prevent analysis of this
|
|
|
207 -- (non-existent) unit in -gnatQ mode because at the moment the
|
|
|
208 -- structure and attributes of this dummy package does not allow
|
|
|
209 -- a normal analysis of this unit
|
|
|
210
|
|
|
211 Set_Analyzed (Cunit);
|
|
|
212
|
|
|
213 Units.Increment_Last;
|
|
|
214 Unum := Units.Last;
|
|
|
215
|
|
|
216 Units.Table (Unum) :=
|
|
|
217 (Cunit => Cunit,
|
|
|
218 Cunit_Entity => Cunit_Entity,
|
|
|
219 Dependency_Num => 0,
|
|
|
220 Dynamic_Elab => False,
|
|
|
221 Error_Location => Sloc (With_Node),
|
|
|
222 Expected_Unit => Spec_Name,
|
|
|
223 Fatal_Error => Error_Detected,
|
|
|
224 Generate_Code => False,
|
|
|
225 Has_RACW => False,
|
|
|
226 Filler => False,
|
|
|
227 Ident_String => Empty,
|
|
|
228
|
|
|
229 Is_Predefined_Renaming => Ren_Name,
|
|
|
230 Is_Predefined_Unit => Pre_Name or Ren_Name,
|
|
|
231 Is_Internal_Unit => Pre_Name or Ren_Name or GNAT_Name,
|
|
|
232 Filler2 => False,
|
|
|
233
|
|
|
234 Loading => False,
|
|
|
235 Main_Priority => Default_Main_Priority,
|
|
|
236 Main_CPU => Default_Main_CPU,
|
|
|
237 Primary_Stack_Count => 0,
|
|
|
238 Sec_Stack_Count => 0,
|
|
|
239 Munit_Index => 0,
|
|
|
240 No_Elab_Code_All => False,
|
|
|
241 Serial_Number => 0,
|
|
|
242 Source_Index => No_Source_File,
|
|
|
243 Unit_File_Name => Fname,
|
|
|
244 Unit_Name => Spec_Name,
|
|
|
245 Version => 0,
|
|
|
246 OA_Setting => 'O');
|
|
|
247
|
|
|
248 Set_Comes_From_Source_Default (Save_CS);
|
|
|
249 Set_Error_Posted (Cunit_Entity);
|
|
|
250 Set_Error_Posted (Cunit);
|
|
|
251 return Unum;
|
|
|
252 end Create_Dummy_Package_Unit;
|
|
|
253
|
|
|
254 -----------------------------
|
|
|
255 -- From_Limited_With_Chain --
|
|
|
256 -----------------------------
|
|
|
257
|
|
|
258 function From_Limited_With_Chain return Boolean is
|
|
|
259 Curr_Num : constant Unit_Number_Type :=
|
|
|
260 Load_Stack.Table (Load_Stack.Last).Unit_Number;
|
|
|
261
|
|
|
262 begin
|
|
|
263 -- True if the current load operation is through a limited_with clause
|
|
|
264 -- and we are not within a loop of regular with_clauses.
|
|
|
265
|
|
|
266 for U in reverse Load_Stack.First .. Load_Stack.Last - 1 loop
|
|
|
267 if Load_Stack.Table (U).Unit_Number = Curr_Num then
|
|
|
268 return False;
|
|
|
269
|
|
|
270 elsif Present (Load_Stack.Table (U).With_Node)
|
|
|
271 and then Limited_Present (Load_Stack.Table (U).With_Node)
|
|
|
272 then
|
|
|
273 return True;
|
|
|
274 end if;
|
|
|
275 end loop;
|
|
|
276
|
|
|
277 return False;
|
|
|
278 end From_Limited_With_Chain;
|
|
|
279
|
|
|
280 ----------------
|
|
|
281 -- Initialize --
|
|
|
282 ----------------
|
|
|
283
|
|
|
284 procedure Initialize is
|
|
|
285 begin
|
|
|
286 Units.Init;
|
|
|
287 Load_Stack.Init;
|
|
|
288 end Initialize;
|
|
|
289
|
|
|
290 ------------------------
|
|
|
291 -- Initialize_Version --
|
|
|
292 ------------------------
|
|
|
293
|
|
|
294 procedure Initialize_Version (U : Unit_Number_Type) is
|
|
|
295 begin
|
|
|
296 Units.Table (U).Version := Source_Checksum (Source_Index (U));
|
|
|
297 end Initialize_Version;
|
|
|
298
|
|
|
299 ----------------------
|
|
|
300 -- Load_Main_Source --
|
|
|
301 ----------------------
|
|
|
302
|
|
|
303 procedure Load_Main_Source is
|
|
|
304 Fname : constant File_Name_Type := Next_Main_Source;
|
|
|
305 Pre_Name : constant Boolean :=
|
|
|
306 Is_Predefined_File_Name (Fname, Renamings_Included => False);
|
|
|
307 Ren_Name : constant Boolean :=
|
|
|
308 Is_Predefined_Renaming_File_Name (Fname);
|
|
|
309 GNAT_Name : constant Boolean :=
|
|
|
310 Is_GNAT_File_Name (Fname);
|
|
|
311 Version : Word := 0;
|
|
|
312
|
|
|
313 begin
|
|
|
314 Load_Stack.Increment_Last;
|
|
|
315 Load_Stack.Table (Load_Stack.Last) := (Main_Unit, Empty);
|
|
|
316
|
|
|
317 -- Initialize unit table entry for Main_Unit. Note that we don't know
|
|
|
318 -- the unit name yet, that gets filled in when the parser parses the
|
|
|
319 -- main unit, at which time a check is made that it matches the main
|
|
|
320 -- file name, and then the Unit_Name field is set. The Cunit and
|
|
|
321 -- Cunit_Entity fields also get filled in later by the parser.
|
|
|
322
|
|
|
323 Units.Increment_Last;
|
|
|
324
|
|
|
325 Units.Table (Main_Unit).Unit_File_Name := Fname;
|
|
|
326
|
|
|
327 if Fname /= No_File then
|
|
|
328 Main_Source_File := Load_Source_File (Fname);
|
|
|
329 Current_Error_Source_File := Main_Source_File;
|
|
|
330
|
|
|
331 if Main_Source_File > No_Source_File then
|
|
|
332 Version := Source_Checksum (Main_Source_File);
|
|
|
333
|
|
|
334 else
|
|
|
335 -- To avoid emitting a source location (since there is no file),
|
|
|
336 -- we write a custom error message instead of using the machinery
|
|
|
337 -- in errout.adb.
|
|
|
338
|
|
|
339 Set_Standard_Error;
|
|
|
340
|
|
|
341 if Main_Source_File = No_Access_To_Source_File then
|
|
|
342 Write_Str
|
|
|
343 ("no read access for file """ & Get_Name_String (Fname)
|
|
|
344 & """");
|
|
|
345 else
|
|
|
346 Write_Str
|
|
|
347 ("file """ & Get_Name_String (Fname) & """ not found");
|
|
|
348 end if;
|
|
|
349
|
|
|
350 Write_Eol;
|
|
|
351 Set_Standard_Output;
|
|
|
352 end if;
|
|
|
353
|
|
|
354 Units.Table (Main_Unit) :=
|
|
|
355 (Cunit => Empty,
|
|
|
356 Cunit_Entity => Empty,
|
|
|
357 Dependency_Num => 0,
|
|
|
358 Dynamic_Elab => False,
|
|
|
359 Error_Location => No_Location,
|
|
|
360 Expected_Unit => No_Unit_Name,
|
|
|
361 Fatal_Error => None,
|
|
|
362 Generate_Code => False,
|
|
|
363 Has_RACW => False,
|
|
|
364 Filler => False,
|
|
|
365 Ident_String => Empty,
|
|
|
366
|
|
|
367 Is_Predefined_Renaming => Ren_Name,
|
|
|
368 Is_Predefined_Unit => Pre_Name or Ren_Name,
|
|
|
369 Is_Internal_Unit => Pre_Name or Ren_Name or GNAT_Name,
|
|
|
370 Filler2 => False,
|
|
|
371
|
|
|
372 Loading => True,
|
|
|
373 Main_Priority => Default_Main_Priority,
|
|
|
374 Main_CPU => Default_Main_CPU,
|
|
|
375 Primary_Stack_Count => 0,
|
|
|
376 Sec_Stack_Count => 0,
|
|
|
377
|
|
|
378 Munit_Index => 0,
|
|
|
379 No_Elab_Code_All => False,
|
|
|
380 Serial_Number => 0,
|
|
|
381 Source_Index => Main_Source_File,
|
|
|
382 Unit_File_Name => Fname,
|
|
|
383 Unit_Name => No_Unit_Name,
|
|
|
384 Version => Version,
|
|
|
385 OA_Setting => 'O');
|
|
|
386 end if;
|
|
|
387 end Load_Main_Source;
|
|
|
388
|
|
|
389 ---------------
|
|
|
390 -- Load_Unit --
|
|
|
391 ---------------
|
|
|
392
|
|
|
393 function Load_Unit
|
|
|
394 (Load_Name : Unit_Name_Type;
|
|
|
395 Required : Boolean;
|
|
|
396 Error_Node : Node_Id;
|
|
|
397 Subunit : Boolean;
|
|
|
398 Corr_Body : Unit_Number_Type := No_Unit;
|
|
|
399 Renamings : Boolean := False;
|
|
|
400 With_Node : Node_Id := Empty;
|
|
|
401 PMES : Boolean := False) return Unit_Number_Type
|
|
|
402 is
|
|
|
403 Calling_Unit : Unit_Number_Type;
|
|
|
404 Uname_Actual : Unit_Name_Type;
|
|
|
405 Unum : Unit_Number_Type;
|
|
|
406 Unump : Unit_Number_Type;
|
|
|
407 Fname : File_Name_Type;
|
|
|
408 Pre_Name : Boolean;
|
|
|
409 Ren_Name : Boolean;
|
|
|
410 GNAT_Name : Boolean;
|
|
|
411 Src_Ind : Source_File_Index;
|
|
|
412 Save_PMES : constant Boolean := Parsing_Main_Extended_Source;
|
|
|
413
|
|
|
414 Save_Cunit_Restrictions : constant Save_Cunit_Boolean_Restrictions :=
|
|
|
415 Cunit_Boolean_Restrictions_Save;
|
|
|
416 -- Save current restrictions for restore at end
|
|
|
417
|
|
|
418 begin
|
|
|
419 Parsing_Main_Extended_Source := PMES;
|
|
|
420
|
|
|
421 -- Initialize restrictions to config restrictions for unit to load if
|
|
|
422 -- it is part of the main extended source, otherwise reset them.
|
|
|
423
|
|
|
424 -- Note: it's a bit odd but PMES is False for subunits, which is why
|
|
|
425 -- we have the OR here. Should be investigated some time???
|
|
|
426
|
|
|
427 if PMES or Subunit then
|
|
|
428 Restore_Config_Cunit_Boolean_Restrictions;
|
|
|
429 else
|
|
|
430 Reset_Cunit_Boolean_Restrictions;
|
|
|
431 end if;
|
|
|
432
|
|
|
433 -- If renamings are allowed and we have a child unit name, then we
|
|
|
434 -- must first load the parent to deal with finding the real name.
|
|
|
435 -- Retain the with_clause that names the child, so that if it is
|
|
|
436 -- limited, the parent is loaded under the same condition.
|
|
|
437
|
|
|
438 if Renamings and then Is_Child_Name (Load_Name) then
|
|
|
439 Unump :=
|
|
|
440 Load_Unit
|
|
|
441 (Load_Name => Get_Parent_Spec_Name (Load_Name),
|
|
|
442 Required => Required,
|
|
|
443 Subunit => False,
|
|
|
444 Renamings => True,
|
|
|
445 Error_Node => Error_Node,
|
|
|
446 With_Node => With_Node);
|
|
|
447
|
|
|
448 if Unump = No_Unit then
|
|
|
449 Parsing_Main_Extended_Source := Save_PMES;
|
|
|
450 return No_Unit;
|
|
|
451 end if;
|
|
|
452
|
|
|
453 -- If parent is a renaming, then we use the renamed package as
|
|
|
454 -- the actual parent for the subsequent load operation.
|
|
|
455
|
|
|
456 if Nkind (Unit (Cunit (Unump))) = N_Package_Renaming_Declaration then
|
|
|
457 Uname_Actual :=
|
|
|
458 New_Child
|
|
|
459 (Load_Name, Get_Unit_Name (Name (Unit (Cunit (Unump)))));
|
|
|
460
|
|
|
461 -- If the load is for a with_clause, for visibility purposes both
|
|
|
462 -- the renamed entity and renaming one must be available in the
|
|
|
463 -- current unit: the renamed one in order to retrieve the child
|
|
|
464 -- unit, and the original one because it may be used as a prefix
|
|
|
465 -- in the body of the current unit. We add an explicit with_clause
|
|
|
466 -- for the original parent so that the renaming declaration is
|
|
|
467 -- properly loaded and analyzed.
|
|
|
468
|
|
|
469 if Present (With_Node) then
|
|
|
470 Insert_After (With_Node,
|
|
|
471 Make_With_Clause (Sloc (With_Node),
|
|
|
472 Name => Copy_Separate_Tree (Prefix (Name (With_Node)))));
|
|
|
473 end if;
|
|
|
474
|
|
|
475 -- Save the renaming entity, to establish its visibility when
|
|
|
476 -- installing the context. The implicit with is on this entity,
|
|
|
477 -- not on the package it renames. This is somewhat redundant given
|
|
|
478 -- the with_clause just created, but it simplifies subsequent
|
|
|
479 -- expansion of the current with_clause. Optimizable ???
|
|
|
480
|
|
|
481 if Nkind (Error_Node) = N_With_Clause
|
|
|
482 and then Nkind (Name (Error_Node)) = N_Selected_Component
|
|
|
483 then
|
|
|
484 declare
|
|
|
485 Par : Node_Id := Name (Error_Node);
|
|
|
486
|
|
|
487 begin
|
|
|
488 while Nkind (Par) = N_Selected_Component
|
|
|
489 and then Chars (Selector_Name (Par)) /=
|
|
|
490 Chars (Cunit_Entity (Unump))
|
|
|
491 loop
|
|
|
492 Par := Prefix (Par);
|
|
|
493 end loop;
|
|
|
494
|
|
|
495 -- Case of some intermediate parent is a renaming
|
|
|
496
|
|
|
497 if Nkind (Par) = N_Selected_Component then
|
|
|
498 Set_Entity (Selector_Name (Par), Cunit_Entity (Unump));
|
|
|
499
|
|
|
500 -- Case where the ultimate parent is a renaming
|
|
|
501
|
|
|
502 else
|
|
|
503 Set_Entity (Par, Cunit_Entity (Unump));
|
|
|
504 end if;
|
|
|
505 end;
|
|
|
506 end if;
|
|
|
507
|
|
|
508 -- If the parent is not a renaming, then get its name (this may
|
|
|
509 -- be different from the parent spec name obtained above because
|
|
|
510 -- of renamings higher up in the hierarchy).
|
|
|
511
|
|
|
512 else
|
|
|
513 Uname_Actual := New_Child (Load_Name, Unit_Name (Unump));
|
|
|
514 end if;
|
|
|
515
|
|
|
516 -- Here if unit to be loaded is not a child unit
|
|
|
517
|
|
|
518 else
|
|
|
519 Uname_Actual := Load_Name;
|
|
|
520 end if;
|
|
|
521
|
|
|
522 Fname := Get_File_Name (Uname_Actual, Subunit);
|
|
|
523 Pre_Name :=
|
|
|
524 Is_Predefined_File_Name (Fname, Renamings_Included => False);
|
|
|
525 Ren_Name := Is_Predefined_Renaming_File_Name (Fname);
|
|
|
526 GNAT_Name := Is_GNAT_File_Name (Fname);
|
|
|
527
|
|
|
528 if Debug_Flag_L then
|
|
|
529 Write_Eol;
|
|
|
530 Write_Str ("*** Load request for unit: ");
|
|
|
531 Write_Unit_Name (Load_Name);
|
|
|
532
|
|
|
533 if Required then
|
|
|
534 Write_Str (" (Required = True)");
|
|
|
535 else
|
|
|
536 Write_Str (" (Required = False)");
|
|
|
537 end if;
|
|
|
538
|
|
|
539 Write_Eol;
|
|
|
540
|
|
|
541 if Uname_Actual /= Load_Name then
|
|
|
542 Write_Str ("*** Actual unit loaded: ");
|
|
|
543 Write_Unit_Name (Uname_Actual);
|
|
|
544 end if;
|
|
|
545 end if;
|
|
|
546
|
|
|
547 -- Capture error location if it is for the main unit. The idea is to
|
|
|
548 -- post errors on the main unit location, not the most recent unit.
|
|
|
549 -- Note: Unit_Name (Main_Unit) is not set if we are parsing gnat.adc.
|
|
|
550
|
|
|
551 if Present (Error_Node)
|
|
|
552 and then Unit_Name (Main_Unit) /= No_Unit_Name
|
|
|
553 then
|
|
|
554 -- It seems like In_Extended_Main_Source_Unit (Error_Node) would
|
|
|
555 -- do the trick here, but that's wrong, it is much too early to
|
|
|
556 -- call this routine. We are still in the parser, and the required
|
|
|
557 -- semantic information is not established yet. So we base the
|
|
|
558 -- judgment on unit names.
|
|
|
559
|
|
|
560 Get_External_Unit_Name_String (Unit_Name (Main_Unit));
|
|
|
561
|
|
|
562 declare
|
|
|
563 Main_Unit_Name : constant String := Name_Buffer (1 .. Name_Len);
|
|
|
564
|
|
|
565 begin
|
|
|
566 Get_External_Unit_Name_String
|
|
|
567 (Unit_Name (Get_Source_Unit (Error_Node)));
|
|
|
568
|
|
|
569 -- If the two names are identical, then for sure we are part
|
|
|
570 -- of the extended main unit
|
|
|
571
|
|
|
572 if Main_Unit_Name = Name_Buffer (1 .. Name_Len) then
|
|
|
573 Load_Msg_Sloc := Sloc (Error_Node);
|
|
|
574
|
|
|
575 -- If the load is called from a with_type clause, the error
|
|
|
576 -- node is correct.
|
|
|
577
|
|
|
578 -- Otherwise, check for the subunit case, and if so, consider
|
|
|
579 -- we have a match if one name is a prefix of the other name.
|
|
|
580
|
|
|
581 else
|
|
|
582 if Nkind (Unit (Cunit (Main_Unit))) = N_Subunit
|
|
|
583 or else
|
|
|
584 Nkind (Unit (Cunit (Get_Source_Unit (Error_Node)))) =
|
|
|
585 N_Subunit
|
|
|
586 then
|
|
|
587 Name_Len := Integer'Min (Name_Len, Main_Unit_Name'Length);
|
|
|
588
|
|
|
589 if Name_Buffer (1 .. Name_Len)
|
|
|
590 =
|
|
|
591 Main_Unit_Name (1 .. Name_Len)
|
|
|
592 then
|
|
|
593 Load_Msg_Sloc := Sloc (Error_Node);
|
|
|
594 end if;
|
|
|
595 end if;
|
|
|
596 end if;
|
|
|
597 end;
|
|
|
598 end if;
|
|
|
599
|
|
|
600 -- If we are generating error messages, then capture calling unit
|
|
|
601
|
|
|
602 if Present (Error_Node) then
|
|
|
603 Calling_Unit := Get_Source_Unit (Error_Node);
|
|
|
604 else
|
|
|
605 Calling_Unit := No_Unit;
|
|
|
606 end if;
|
|
|
607
|
|
|
608 -- See if we already have an entry for this unit
|
|
|
609
|
|
|
610 Unum := Main_Unit;
|
|
|
611 while Unum <= Units.Last loop
|
|
|
612 exit when Uname_Actual = Units.Table (Unum).Unit_Name;
|
|
|
613 Unum := Unum + 1;
|
|
|
614 end loop;
|
|
|
615
|
|
|
616 -- Whether or not the entry was found, Unum is now the right value,
|
|
|
617 -- since it is one more than Units.Last (i.e. the index of the new
|
|
|
618 -- entry we will create) in the not found case.
|
|
|
619
|
|
|
620 -- A special check is necessary in the unit not found case. If the unit
|
|
|
621 -- is not found, but the file in which it lives has already been loaded,
|
|
|
622 -- then we have the problem that the file does not contain the unit that
|
|
|
623 -- is needed. We simply treat this as a file not found condition.
|
|
|
624
|
|
|
625 -- We skip this test in multiple unit per file mode since in this
|
|
|
626 -- case we can have multiple units from the same source file.
|
|
|
627
|
|
|
628 if Unum > Units.Last and then Get_Unit_Index (Uname_Actual) = 0 then
|
|
|
629 for J in Units.First .. Units.Last loop
|
|
|
630 if Fname = Units.Table (J).Unit_File_Name then
|
|
|
631 if Debug_Flag_L then
|
|
|
632 Write_Str (" file does not contain unit, Unit_Number = ");
|
|
|
633 Write_Int (Int (Unum));
|
|
|
634 Write_Eol;
|
|
|
635 Write_Eol;
|
|
|
636 end if;
|
|
|
637
|
|
|
638 if Present (Error_Node) then
|
|
|
639 Get_Name_String (Fname);
|
|
|
640
|
|
|
641 if Is_Predefined_File_Name (Fname) then
|
|
|
642 Error_Msg_Unit_1 := Uname_Actual;
|
|
|
643 Error_Msg
|
|
|
644 ("$$ is not a language defined unit", Load_Msg_Sloc);
|
|
|
645 else
|
|
|
646 Error_Msg_File_1 := Fname;
|
|
|
647 Error_Msg_Unit_1 := Uname_Actual;
|
|
|
648 Error_Msg ("File{ does not contain unit$", Load_Msg_Sloc);
|
|
|
649 end if;
|
|
|
650
|
|
|
651 Write_Dependency_Chain;
|
|
|
652 Unum := No_Unit;
|
|
|
653 goto Done;
|
|
|
654
|
|
|
655 else
|
|
|
656 Unum := No_Unit;
|
|
|
657 goto Done;
|
|
|
658 end if;
|
|
|
659 end if;
|
|
|
660 end loop;
|
|
|
661 end if;
|
|
|
662
|
|
|
663 -- If we are proceeding with load, then make load stack entry,
|
|
|
664 -- and indicate the kind of with_clause responsible for the load.
|
|
|
665
|
|
|
666 Load_Stack.Increment_Last;
|
|
|
667 Load_Stack.Table (Load_Stack.Last) := (Unum, With_Node);
|
|
|
668
|
|
|
669 -- Case of entry already in table
|
|
|
670
|
|
|
671 if Unum <= Units.Last then
|
|
|
672
|
|
|
673 -- Here is where we check for a circular dependency, which is
|
|
|
674 -- an attempt to load a unit which is currently in the process
|
|
|
675 -- of being loaded. We do *not* care about a circular chain that
|
|
|
676 -- leads back to a body, because this kind of circular dependence
|
|
|
677 -- legitimately occurs (e.g. two package bodies that contain
|
|
|
678 -- inlined subprogram referenced by the other).
|
|
|
679
|
|
|
680 -- Ada 2005 (AI-50217): We also ignore limited_with clauses, because
|
|
|
681 -- their purpose is precisely to create legal circular structures.
|
|
|
682
|
|
|
683 if Loading (Unum)
|
|
|
684 and then (Is_Spec_Name (Units.Table (Unum).Unit_Name)
|
|
|
685 or else Acts_As_Spec (Units.Table (Unum).Cunit))
|
|
|
686 and then (Nkind (Error_Node) /= N_With_Clause
|
|
|
687 or else not Limited_Present (Error_Node))
|
|
|
688 and then not From_Limited_With_Chain
|
|
|
689 then
|
|
|
690 if Debug_Flag_L then
|
|
|
691 Write_Str (" circular dependency encountered");
|
|
|
692 Write_Eol;
|
|
|
693 end if;
|
|
|
694
|
|
|
695 if Present (Error_Node) then
|
|
|
696 Error_Msg ("circular unit dependency", Load_Msg_Sloc);
|
|
|
697 Write_Dependency_Chain;
|
|
|
698 else
|
|
|
699 Load_Stack.Decrement_Last;
|
|
|
700 end if;
|
|
|
701
|
|
|
702 Unum := No_Unit;
|
|
|
703 goto Done;
|
|
|
704 end if;
|
|
|
705
|
|
|
706 if Debug_Flag_L then
|
|
|
707 Write_Str (" unit already in file table, Unit_Number = ");
|
|
|
708 Write_Int (Int (Unum));
|
|
|
709 Write_Eol;
|
|
|
710 end if;
|
|
|
711
|
|
|
712 Load_Stack.Decrement_Last;
|
|
|
713 goto Done;
|
|
|
714
|
|
|
715 -- Unit is not already in table, so try to open the file
|
|
|
716
|
|
|
717 else
|
|
|
718 if Debug_Flag_L then
|
|
|
719 Write_Str (" attempt unit load, Unit_Number = ");
|
|
|
720 Write_Int (Int (Unum));
|
|
|
721 Write_Eol;
|
|
|
722 end if;
|
|
|
723
|
|
|
724 Src_Ind := Load_Source_File (Fname);
|
|
|
725
|
|
|
726 -- Make a partial entry in the file table, used even in the file not
|
|
|
727 -- found case to print the dependency chain including the last entry
|
|
|
728
|
|
|
729 Units.Increment_Last;
|
|
|
730 Units.Table (Unum).Unit_Name := Uname_Actual;
|
|
|
731
|
|
|
732 -- File was found
|
|
|
733
|
|
|
734 if Src_Ind > No_Source_File then
|
|
|
735 Units.Table (Unum) :=
|
|
|
736 (Cunit => Empty,
|
|
|
737 Cunit_Entity => Empty,
|
|
|
738 Dependency_Num => 0,
|
|
|
739 Dynamic_Elab => False,
|
|
|
740 Error_Location => Sloc (Error_Node),
|
|
|
741 Expected_Unit => Uname_Actual,
|
|
|
742 Fatal_Error => None,
|
|
|
743 Generate_Code => False,
|
|
|
744 Has_RACW => False,
|
|
|
745 Filler => False,
|
|
|
746 Ident_String => Empty,
|
|
|
747
|
|
|
748 Is_Predefined_Renaming => Ren_Name,
|
|
|
749 Is_Predefined_Unit => Pre_Name or Ren_Name,
|
|
|
750 Is_Internal_Unit => Pre_Name or Ren_Name or GNAT_Name,
|
|
|
751 Filler2 => False,
|
|
|
752
|
|
|
753 Loading => True,
|
|
|
754 Main_Priority => Default_Main_Priority,
|
|
|
755 Main_CPU => Default_Main_CPU,
|
|
|
756 Primary_Stack_Count => 0,
|
|
|
757 Sec_Stack_Count => 0,
|
|
|
758 Munit_Index => 0,
|
|
|
759 No_Elab_Code_All => False,
|
|
|
760 Serial_Number => 0,
|
|
|
761 Source_Index => Src_Ind,
|
|
|
762 Unit_File_Name => Fname,
|
|
|
763 Unit_Name => Uname_Actual,
|
|
|
764 Version => Source_Checksum (Src_Ind),
|
|
|
765 OA_Setting => 'O');
|
|
|
766
|
|
|
767 -- Parse the new unit
|
|
|
768
|
|
|
769 declare
|
|
|
770 Save_Index : constant Nat := Multiple_Unit_Index;
|
|
|
771 Save_PMES : constant Boolean := Parsing_Main_Extended_Source;
|
|
|
772
|
|
|
773 begin
|
|
|
774 Multiple_Unit_Index := Get_Unit_Index (Uname_Actual);
|
|
|
775 Units.Table (Unum).Munit_Index := Multiple_Unit_Index;
|
|
|
776 Initialize_Scanner (Unum, Source_Index (Unum));
|
|
|
777
|
|
|
778 if Calling_Unit = Main_Unit and then Subunit then
|
|
|
779 Parsing_Main_Extended_Source := True;
|
|
|
780 end if;
|
|
|
781
|
|
|
782 Discard_List (Par (Configuration_Pragmas => False));
|
|
|
783
|
|
|
784 Parsing_Main_Extended_Source := Save_PMES;
|
|
|
785
|
|
|
786 Multiple_Unit_Index := Save_Index;
|
|
|
787 Set_Loading (Unum, False);
|
|
|
788 end;
|
|
|
789
|
|
|
790 -- If spec is irrelevant, then post errors and quit
|
|
|
791
|
|
|
792 if Corr_Body /= No_Unit
|
|
|
793 and then Spec_Is_Irrelevant (Unum, Corr_Body)
|
|
|
794 then
|
|
|
795 Error_Msg_File_1 := Unit_File_Name (Corr_Body);
|
|
|
796 Error_Msg
|
|
|
797 ("cannot compile subprogram in file {!", Load_Msg_Sloc);
|
|
|
798 Error_Msg_File_1 := Unit_File_Name (Unum);
|
|
|
799 Error_Msg
|
|
|
800 ("\incorrect spec in file { must be removed first!",
|
|
|
801 Load_Msg_Sloc);
|
|
|
802 Unum := No_Unit;
|
|
|
803 goto Done;
|
|
|
804 end if;
|
|
|
805
|
|
|
806 -- If loaded unit had an error, then caller inherits setting
|
|
|
807
|
|
|
808 if Present (Error_Node) then
|
|
|
809 case Units.Table (Unum).Fatal_Error is
|
|
|
810
|
|
|
811 -- Nothing to do if with'ed unit had no error
|
|
|
812
|
|
|
813 when None =>
|
|
|
814 null;
|
|
|
815
|
|
|
816 -- If with'ed unit had a detected fatal error, propagate it
|
|
|
817
|
|
|
818 when Error_Detected =>
|
|
|
819 Units.Table (Calling_Unit).Fatal_Error := Error_Detected;
|
|
|
820
|
|
|
821 -- If with'ed unit had an ignored error, then propagate it
|
|
|
822 -- but do not overide an existring setting.
|
|
|
823
|
|
|
824 when Error_Ignored =>
|
|
|
825 if Units.Table (Calling_Unit).Fatal_Error = None then
|
|
|
826 Units.Table (Calling_Unit).Fatal_Error :=
|
|
|
827 Error_Ignored;
|
|
|
828 end if;
|
|
|
829 end case;
|
|
|
830 end if;
|
|
|
831
|
|
|
832 -- Remove load stack entry and return the entry in the file table
|
|
|
833
|
|
|
834 Load_Stack.Decrement_Last;
|
|
|
835
|
|
|
836 -- All done, return unit number
|
|
|
837
|
|
|
838 goto Done;
|
|
|
839
|
|
|
840 -- Case of file not found
|
|
|
841
|
|
|
842 else
|
|
|
843 if Debug_Flag_L then
|
|
|
844 if Src_Ind = No_Access_To_Source_File then
|
|
|
845 Write_Str (" no read access to file, load failed");
|
|
|
846 else
|
|
|
847 Write_Str (" file was not found, load failed");
|
|
|
848 end if;
|
|
|
849
|
|
|
850 Write_Eol;
|
|
|
851 end if;
|
|
|
852
|
|
|
853 -- Generate message if unit required
|
|
|
854
|
|
|
855 if Required then
|
|
|
856 Get_Name_String (Fname);
|
|
|
857
|
|
|
858 if Is_Predefined_File_Name (Fname) then
|
|
|
859
|
|
|
860 -- This is a predefined library unit which is not present
|
|
|
861 -- in the run time. If a predefined unit is not available
|
|
|
862 -- it may very likely be the case that there is also pragma
|
|
|
863 -- Restriction forbidding its usage. This is typically the
|
|
|
864 -- case when building a configurable run time, where the
|
|
|
865 -- usage of certain run-time units is restricted by means
|
|
|
866 -- of both the corresponding pragma Restriction (such as
|
|
|
867 -- No_Calendar), and by not including the unit. Hence, we
|
|
|
868 -- check whether this predefined unit is forbidden, so that
|
|
|
869 -- the message about the restriction violation is generated,
|
|
|
870 -- if needed.
|
|
|
871
|
|
|
872 if Present (Error_Node) then
|
|
|
873 Check_Restricted_Unit (Load_Name, Error_Node);
|
|
|
874 end if;
|
|
|
875
|
|
|
876 Error_Msg_Unit_1 := Uname_Actual;
|
|
|
877 Error_Msg -- CODEFIX
|
|
|
878 ("$$ is not a predefined library unit", Load_Msg_Sloc);
|
|
|
879
|
|
|
880 else
|
|
|
881 Error_Msg_File_1 := Fname;
|
|
|
882
|
|
|
883 if Src_Ind = No_Access_To_Source_File then
|
|
|
884 Error_Msg ("no read access to file{", Load_Msg_Sloc);
|
|
|
885 else
|
|
|
886 Error_Msg ("file{ not found", Load_Msg_Sloc);
|
|
|
887 end if;
|
|
|
888 end if;
|
|
|
889
|
|
|
890 Write_Dependency_Chain;
|
|
|
891
|
|
|
892 -- Remove unit from stack, to avoid cascaded errors on
|
|
|
893 -- subsequent missing files.
|
|
|
894
|
|
|
895 Load_Stack.Decrement_Last;
|
|
|
896 Units.Decrement_Last;
|
|
|
897
|
|
|
898 -- If unit not required, remove load stack entry and the junk
|
|
|
899 -- file table entry, and return No_Unit to indicate not found,
|
|
|
900
|
|
|
901 else
|
|
|
902 Load_Stack.Decrement_Last;
|
|
|
903 Units.Decrement_Last;
|
|
|
904 end if;
|
|
|
905
|
|
|
906 Unum := No_Unit;
|
|
|
907 goto Done;
|
|
|
908 end if;
|
|
|
909 end if;
|
|
|
910
|
|
|
911 -- Here to exit, with result in Unum
|
|
|
912
|
|
|
913 <<Done>>
|
|
|
914 Parsing_Main_Extended_Source := Save_PMES;
|
|
|
915 Cunit_Boolean_Restrictions_Restore (Save_Cunit_Restrictions);
|
|
|
916 return Unum;
|
|
|
917 end Load_Unit;
|
|
|
918
|
|
|
919 --------------------------
|
|
|
920 -- Make_Child_Decl_Unit --
|
|
|
921 --------------------------
|
|
|
922
|
|
|
923 procedure Make_Child_Decl_Unit (N : Node_Id) is
|
|
|
924 Unit_Decl : constant Node_Id := Library_Unit (N);
|
|
|
925
|
|
|
926 begin
|
|
|
927 Units.Increment_Last;
|
|
|
928 Units.Table (Units.Last) := Units.Table (Get_Cunit_Unit_Number (N));
|
|
|
929 Units.Table (Units.Last).Unit_Name :=
|
|
|
930 Get_Spec_Name (Unit_Name (Get_Cunit_Unit_Number (N)));
|
|
|
931 Units.Table (Units.Last).Cunit := Unit_Decl;
|
|
|
932 Units.Table (Units.Last).Cunit_Entity :=
|
|
|
933 Defining_Identifier
|
|
|
934 (Defining_Unit_Name (Specification (Unit (Unit_Decl))));
|
|
|
935
|
|
|
936 -- The library unit created for of a child subprogram unit plays no
|
|
|
937 -- role in code generation and binding, so label it accordingly.
|
|
|
938
|
|
|
939 Units.Table (Units.Last).Generate_Code := False;
|
|
|
940 Set_Has_No_Elaboration_Code (Unit_Decl);
|
|
|
941 end Make_Child_Decl_Unit;
|
|
|
942
|
|
|
943 ------------------------
|
|
|
944 -- Make_Instance_Unit --
|
|
|
945 ------------------------
|
|
|
946
|
|
|
947 -- If the unit is an instance, it appears as a package declaration, but
|
|
|
948 -- contains both declaration and body of the instance. The body becomes
|
|
|
949 -- the main unit of the compilation, and the declaration is inserted
|
|
|
950 -- at the end of the unit table. The main unit now has the name of a
|
|
|
951 -- body, which is constructed from the name of the original spec,
|
|
|
952 -- and is attached to the compilation node of the original unit. The
|
|
|
953 -- declaration has been attached to a new compilation unit node, and
|
|
|
954 -- code will have to be generated for it.
|
|
|
955
|
|
|
956 procedure Make_Instance_Unit (N : Node_Id; In_Main : Boolean) is
|
|
|
957 Sind : constant Source_File_Index := Source_Index (Main_Unit);
|
|
|
958
|
|
|
959 begin
|
|
|
960 Units.Increment_Last;
|
|
|
961
|
|
|
962 if In_Main then
|
|
|
963 Units.Table (Units.Last) := Units.Table (Main_Unit);
|
|
|
964 Units.Table (Units.Last).Cunit := Library_Unit (N);
|
|
|
965 Units.Table (Units.Last).Generate_Code := True;
|
|
|
966 Units.Table (Main_Unit).Cunit := N;
|
|
|
967 Units.Table (Main_Unit).Unit_Name :=
|
|
|
968 Get_Body_Name
|
|
|
969 (Unit_Name (Get_Cunit_Unit_Number (Library_Unit (N))));
|
|
|
970 Units.Table (Main_Unit).Version := Source_Checksum (Sind);
|
|
|
971
|
|
|
972 else
|
|
|
973 -- Duplicate information from instance unit, for the body. The unit
|
|
|
974 -- node N has been rewritten as a body, but it was placed in the
|
|
|
975 -- units table when first loaded as a declaration.
|
|
|
976
|
|
|
977 Units.Table (Units.Last) := Units.Table (Get_Cunit_Unit_Number (N));
|
|
|
978 Units.Table (Units.Last).Cunit := Library_Unit (N);
|
|
|
979 end if;
|
|
|
980 end Make_Instance_Unit;
|
|
|
981
|
|
|
982 ------------------------
|
|
|
983 -- Spec_Is_Irrelevant --
|
|
|
984 ------------------------
|
|
|
985
|
|
|
986 function Spec_Is_Irrelevant
|
|
|
987 (Spec_Unit : Unit_Number_Type;
|
|
|
988 Body_Unit : Unit_Number_Type) return Boolean
|
|
|
989 is
|
|
|
990 Sunit : constant Node_Id := Cunit (Spec_Unit);
|
|
|
991 Bunit : constant Node_Id := Cunit (Body_Unit);
|
|
|
992
|
|
|
993 begin
|
|
|
994 -- The spec is irrelevant if the body is a subprogram body, and the spec
|
|
|
995 -- is other than a subprogram spec or generic subprogram spec. Note that
|
|
|
996 -- the names must be the same, we don't need to check that, because we
|
|
|
997 -- already know that from the fact that the file names are the same.
|
|
|
998
|
|
|
999 return
|
|
|
1000 Nkind (Unit (Bunit)) = N_Subprogram_Body
|
|
|
1001 and then Nkind (Unit (Sunit)) /= N_Subprogram_Declaration
|
|
|
1002 and then Nkind (Unit (Sunit)) /= N_Generic_Subprogram_Declaration;
|
|
|
1003 end Spec_Is_Irrelevant;
|
|
|
1004
|
|
|
1005 --------------------
|
|
|
1006 -- Version_Update --
|
|
|
1007 --------------------
|
|
|
1008
|
|
|
1009 procedure Version_Update (U : Node_Id; From : Node_Id) is
|
|
|
1010 Unum : constant Unit_Number_Type := Get_Cunit_Unit_Number (U);
|
|
|
1011 Fnum : constant Unit_Number_Type := Get_Cunit_Unit_Number (From);
|
|
|
1012 begin
|
|
|
1013 if Source_Index (Fnum) > No_Source_File then
|
|
|
1014 Units.Table (Unum).Version :=
|
|
|
1015 Units.Table (Unum).Version
|
|
|
1016 xor
|
|
|
1017 Source_Checksum (Source_Index (Fnum));
|
|
|
1018 end if;
|
|
|
1019 end Version_Update;
|
|
|
1020
|
|
|
1021 ----------------------------
|
|
|
1022 -- Write_Dependency_Chain --
|
|
|
1023 ----------------------------
|
|
|
1024
|
|
|
1025 procedure Write_Dependency_Chain is
|
|
|
1026 begin
|
|
|
1027 -- The dependency chain is only written if it is at least two entries
|
|
|
1028 -- deep, otherwise it is trivial (the main unit depending on a unit
|
|
|
1029 -- that it obviously directly depends on).
|
|
|
1030
|
|
|
1031 if Load_Stack.Last - 1 > Load_Stack.First then
|
|
|
1032 for U in Load_Stack.First .. Load_Stack.Last - 1 loop
|
|
|
1033 Error_Msg_Unit_1 :=
|
|
|
1034 Unit_Name (Load_Stack.Table (U).Unit_Number);
|
|
|
1035 Error_Msg_Unit_2 :=
|
|
|
1036 Unit_Name (Load_Stack.Table (U + 1).Unit_Number);
|
|
|
1037 Error_Msg ("$ depends on $!", Load_Msg_Sloc);
|
|
|
1038 end loop;
|
|
|
1039 end if;
|
|
|
1040 end Write_Dependency_Chain;
|
|
|
1041
|
|
|
1042 end Lib.Load;
|
