1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2002-2007, AdaCore --
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. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 with MLib.Fil; use MLib.Fil;
27 with MLib.Tgt; use MLib.Tgt;
30 with Output; use Output;
32 with Interfaces.C.Strings; use Interfaces.C.Strings;
36 package body MLib.Utl is
38 Gcc_Name : String_Access;
39 -- Default value of the "gcc" executable used in procedure Gcc
41 Gcc_Exec : String_Access;
42 -- The full path name of the "gcc" executable
44 Ar_Name : String_Access;
45 -- The name of the archive builder for the platform, set when procedure Ar
46 -- is called for the first time.
48 Ar_Exec : String_Access;
49 -- The full path name of the archive builder
51 Ar_Options : String_List_Access;
52 -- The minimum options used when invoking the archive builder
54 Ar_Append_Options : String_List_Access;
55 -- The options to be used when invoking the archive builder to add chunks
56 -- of object files, when building the archive in chunks.
58 Opt_Length : Natural := 0;
59 -- The max number of options for the Archive_Builder
61 Initial_Size : Natural := 0;
62 -- The minimum number of bytes for the invocation of the Archive Builder
63 -- (without name of the archive or object files).
65 Ranlib_Name : String_Access;
66 -- The name of the archive indexer for the platform, if there is one
68 Ranlib_Exec : String_Access := null;
69 -- The full path name of the archive indexer
71 Ranlib_Options : String_List_Access := null;
72 -- The options to be used when invoking the archive indexer, if any
78 procedure Ar (Output_File : String; Objects : Argument_List) is
79 Full_Output_File : constant String :=
80 Ext_To (Output_File, Archive_Ext);
82 Arguments : Argument_List_Access;
83 Last_Arg : Natural := 0;
85 Line_Length : Natural := 0;
87 Maximum_Size : Integer;
88 pragma Import (C, Maximum_Size, "__gnat_link_max");
89 -- Maximum number of bytes to put in an invocation of the
93 -- The number of bytes for the invocation of the archive builder
95 Current_Object : Natural;
98 -- Display an invocation of the Archive Builder
106 if not Opt.Quiet_Output then
107 Write_Str (Ar_Name.all);
108 Line_Length := Ar_Name'Length;
110 for J in 1 .. Last_Arg loop
112 -- Make sure the Output buffer does not overflow
114 if Line_Length + 1 + Arguments (J)'Length > Buffer_Max then
121 -- Only output the first object files when not in verbose mode
123 if (not Opt.Verbose_Mode) and then J = Opt_Length + 3 then
128 Write_Str (Arguments (J).all);
129 Line_Length := Line_Length + 1 + Arguments (J)'Length;
138 if Ar_Exec = null then
139 Ar_Name := Osint.Program_Name (Archive_Builder);
140 Ar_Exec := Locate_Exec_On_Path (Ar_Name.all);
142 if Ar_Exec = null then
144 Ar_Name := new String'(Archive_Builder);
145 Ar_Exec := Locate_Exec_On_Path (Ar_Name.all);
148 if Ar_Exec = null then
149 Fail (Ar_Name.all, " not found in path");
151 elsif Opt.Verbose_Mode then
152 Write_Str ("found ");
153 Write_Line (Ar_Exec.all);
156 Ar_Options := Archive_Builder_Options;
159 for J in Ar_Options'Range loop
160 Initial_Size := Initial_Size + Ar_Options (J)'Length + 1;
163 Ar_Append_Options := Archive_Builder_Append_Options;
165 Opt_Length := Ar_Options'Length;
167 if Ar_Append_Options /= null then
168 Opt_Length := Natural'Max (Ar_Append_Options'Length, Opt_Length);
171 for J in Ar_Append_Options'Range loop
172 Size := Size + Ar_Append_Options (J)'Length + 1;
175 Initial_Size := Integer'Max (Initial_Size, Size);
180 Ranlib_Name := Osint.Program_Name (Archive_Indexer);
182 if Ranlib_Name'Length > 0 then
183 Ranlib_Exec := Locate_Exec_On_Path (Ranlib_Name.all);
185 if Ranlib_Exec = null then
187 Ranlib_Name := new String'(Archive_Indexer);
188 Ranlib_Exec := Locate_Exec_On_Path (Ranlib_Name.all);
191 if Ranlib_Exec /= null and then Opt.Verbose_Mode then
192 Write_Str ("found ");
193 Write_Line (Ranlib_Exec.all);
197 Ranlib_Options := Archive_Indexer_Options;
201 new String_List (1 .. 1 + Opt_Length + Objects'Length);
202 Arguments (1 .. Ar_Options'Length) := Ar_Options.all; -- "ar cr ..."
203 Arguments (Ar_Options'Length + 1) := new String'(Full_Output_File);
205 Delete_File (Full_Output_File);
207 Size := Initial_Size + Full_Output_File'Length + 1;
209 -- Check the full size of a call of the archive builder with all the
212 for J in Objects'Range loop
213 Size := Size + Objects (J)'Length + 1;
216 -- If the size is not too large or if it is not possible to build the
217 -- archive in chunks, build the archive in a single invocation.
219 if Size <= Maximum_Size or else Ar_Append_Options = null then
220 Last_Arg := Ar_Options'Length + 1 + Objects'Length;
221 Arguments (Ar_Options'Length + 2 .. Last_Arg) := Objects;
225 Spawn (Ar_Exec.all, Arguments (1 .. Last_Arg), Success);
228 -- Build the archive in several invocation, making sure to not
229 -- go over the maximum size for each invocation.
231 Last_Arg := Ar_Options'Length + 1;
232 Current_Object := Objects'First;
233 Size := Initial_Size + Full_Output_File'Length + 1;
237 while Current_Object <= Objects'Last loop
238 Size := Size + Objects (Current_Object)'Length + 1;
239 exit when Size > Maximum_Size;
240 Last_Arg := Last_Arg + 1;
241 Arguments (Last_Arg) := Objects (Current_Object);
242 Current_Object := Current_Object + 1;
247 Spawn (Ar_Exec.all, Arguments (1 .. Last_Arg), Success);
249 Arguments (1 .. Ar_Append_Options'Length) := Ar_Append_Options.all;
251 (Ar_Append_Options'Length + 1) := new String'(Full_Output_File);
253 -- Appending invocation(s)
255 Big_Loop : while Success and then Current_Object <= Objects'Last loop
256 Last_Arg := Ar_Append_Options'Length + 1;
257 Size := Initial_Size + Full_Output_File'Length + 1;
259 Inner_Loop : while Current_Object <= Objects'Last loop
260 Size := Size + Objects (Current_Object)'Length + 1;
261 exit Inner_Loop when Size > Maximum_Size;
262 Last_Arg := Last_Arg + 1;
263 Arguments (Last_Arg) := Objects (Current_Object);
264 Current_Object := Current_Object + 1;
269 Spawn (Ar_Exec.all, Arguments (1 .. Last_Arg), Success);
274 Fail (Ar_Name.all, " execution error.");
277 -- If we have found ranlib, run it over the library
279 if Ranlib_Exec /= null then
280 if not Opt.Quiet_Output then
281 Write_Str (Ranlib_Name.all);
283 Write_Line (Arguments (Ar_Options'Length + 1).all);
288 Ranlib_Options.all & (Arguments (Ar_Options'Length + 1)),
292 Fail (Ranlib_Name.all, " execution error.");
301 procedure Delete_File (Filename : String) is
302 File : constant String := Filename & ASCII.Nul;
306 Delete_File (File'Address, Success);
308 if Opt.Verbose_Mode then
310 Write_Str ("deleted ");
313 Write_Str ("could not delete ");
316 Write_Line (Filename);
325 (Output_File : String;
326 Objects : Argument_List;
327 Options : Argument_List;
328 Options_2 : Argument_List;
329 Driver_Name : Name_Id := No_Name)
331 Link_Bytes : Integer := 0;
332 -- Projected number of bytes for the linker command line
335 pragma Import (C, Link_Max, "__gnat_link_max");
336 -- Maximum number of bytes on the command line supported by the OS
337 -- linker. Passed this limit the response file mechanism must be used
340 Object_List_File_Supported : Boolean;
341 for Object_List_File_Supported'Size use Character'Size;
343 (C, Object_List_File_Supported, "__gnat_objlist_file_supported");
344 -- Predicate indicating whether the linker has an option whereby the
345 -- names of object files can be passed to the linker in a file.
347 Object_File_Option_Ptr : Interfaces.C.Strings.chars_ptr;
348 pragma Import (C, Object_File_Option_Ptr, "__gnat_object_file_option");
349 -- Pointer to a string representing the linker option which specifies
350 -- the response file.
352 Using_GNU_Linker : Boolean;
353 for Using_GNU_Linker'Size use Character'Size;
354 pragma Import (C, Using_GNU_Linker, "__gnat_using_gnu_linker");
355 -- Predicate indicating whether this target uses the GNU linker. In
356 -- this case we must output a GNU linker compatible response file.
358 Opening : aliased constant String := """";
359 Closing : aliased constant String := '"' & ASCII.LF;
360 -- Needed to quote object paths in object list files when GNU linker
363 Tname : String_Access;
364 Tname_FD : File_Descriptor := Invalid_FD;
365 -- Temporary file used by linker to pass list of object files on
366 -- certain systems with limitations on size of arguments.
368 Closing_Status : Boolean;
373 (1 .. 7 + Objects'Length + Options'Length + Options_2'Length);
378 Out_Opt : constant String_Access := new String'("-o");
379 Out_V : constant String_Access := new String'(Output_File);
380 Lib_Dir : constant String_Access := new String'("-L" & Lib_Directory);
381 Lib_Opt : constant String_Access := new String'(Dynamic_Option);
383 Driver : String_Access;
385 type Object_Position is (First, Second, Last);
387 Position : Object_Position;
389 procedure Write_RF (A : System.Address; N : Integer);
390 -- Write a string to the response file and check if it was successful.
391 -- Fail the program if it was not successful (disk full).
397 procedure Write_RF (A : System.Address; N : Integer) is
400 Status := Write (Tname_FD, A, N);
403 Fail ("cannot generate response file to link library: disk full");
408 if Driver_Name = No_Name then
409 if Gcc_Exec = null then
410 if Gcc_Name = null then
411 Gcc_Name := Osint.Program_Name ("gcc");
414 Gcc_Exec := Locate_Exec_On_Path (Gcc_Name.all);
416 if Gcc_Exec = null then
417 Fail (Gcc_Name.all, " not found in path");
424 Driver := Locate_Exec_On_Path (Get_Name_String (Driver_Name));
426 if Driver = null then
427 Fail (Get_Name_String (Driver_Name), " not found in path");
433 if Lib_Opt'Length /= 0 then
435 Arguments (A) := Lib_Opt;
436 Link_Bytes := Link_Bytes + Lib_Opt'Length + 1;
440 Arguments (A) := Out_Opt;
441 Link_Bytes := Link_Bytes + Out_Opt'Length + 1;
444 Arguments (A) := Out_V;
445 Link_Bytes := Link_Bytes + Out_V'Length + 1;
448 Arguments (A) := Lib_Dir;
449 Link_Bytes := Link_Bytes + Lib_Dir'Length + 1;
451 A := A + Options'Length;
452 Arguments (A - Options'Length + 1 .. A) := Options;
454 for J in Options'Range loop
455 Link_Bytes := Link_Bytes + Options (J)'Length + 1;
458 if not Opt.Quiet_Output then
459 Write_Str (Driver.all);
463 Write_Str (Arguments (J).all);
466 -- Do not display all the object files if not in verbose mode, only
470 for J in Objects'Range loop
471 if Opt.Verbose_Mode or else Position = First then
473 Write_Str (Objects (J).all);
476 elsif Position = Second then
482 for J in Options_2'Range loop
484 Write_Str (Options_2 (J).all);
490 for J in Objects'Range loop
491 Link_Bytes := Link_Bytes + Objects (J)'Length + 1;
494 for J in Options_2'Range loop
495 Link_Bytes := Link_Bytes + Options_2 (J)'Length + 1;
498 if Object_List_File_Supported and then Link_Bytes > Link_Max then
499 -- Create a temporary file containing the object files, one object
500 -- file per line for maximal compatibility with linkers supporting
503 Create_Temp_File (Tname_FD, Tname);
505 -- If target is using the GNU linker we must add a special header
506 -- and footer in the response file.
508 -- The syntax is : INPUT (object1.o object2.o ... )
510 -- Because the GNU linker does not like name with characters such
511 -- as '!', we must put the object paths between double quotes.
513 if Using_GNU_Linker then
515 GNU_Header : aliased constant String := "INPUT (";
518 Write_RF (GNU_Header'Address, GNU_Header'Length);
522 for J in Objects'Range loop
523 -- Opening quote for GNU linker
525 if Using_GNU_Linker then
526 Write_RF (Opening'Address, 1);
530 (Objects (J).all'Address, Objects (J).all'Length);
532 -- Closing quote for GNU linker
534 if Using_GNU_Linker then
535 Write_RF (Closing'Address, 2);
538 Write_RF (ASCII.LF'Address, 1);
542 -- Handle GNU linker response file footer
544 if Using_GNU_Linker then
546 GNU_Footer : aliased constant String := ")";
549 Write_RF (GNU_Footer'Address, GNU_Footer'Length);
553 Close (Tname_FD, Closing_Status);
555 if not Closing_Status then
556 Fail ("cannot generate response file to link library: disk full");
561 new String'(Value (Object_File_Option_Ptr) & Tname.all);
564 A := A + Objects'Length;
565 Arguments (A - Objects'Length + 1 .. A) := Objects;
568 A := A + Options_2'Length;
569 Arguments (A - Options_2'Length + 1 .. A) := Options_2;
571 Spawn (Driver.all, Arguments (1 .. A), Success);
573 if Tname /= null then
574 Delete_File (Tname.all, Closing_Status);
576 if not Closing_Status then
577 Write_Str ("warning: could not delete response file """);
578 Write_Str (Tname.all);
579 Write_Line (""" to link library");
584 if Driver_Name = No_Name then
585 Fail (Gcc_Name.all, " execution error");
587 Fail (Get_Name_String (Driver_Name), " execution error");
596 function Lib_Directory return String is
597 Libgnat : constant String := Tgt.Libgnat;
600 Name_Len := Libgnat'Length;
601 Name_Buffer (1 .. Name_Len) := Libgnat;
602 Get_Name_String (Osint.Find_File (Name_Enter, Osint.Library));
606 return Name_Buffer (1 .. Name_Len - Libgnat'Length);