1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- G N A T L I N K -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1996-2019, Free Software Foundation, Inc. -- 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-- Gnatlink usage: please consult the gnat documentation 27 28with ALI; use ALI; 29with Csets; 30with Gnatvsn; use Gnatvsn; 31with Indepsw; use Indepsw; 32with Namet; use Namet; 33with Opt; 34with Osint; use Osint; 35with Output; use Output; 36with Snames; 37with Switch; use Switch; 38with System; use System; 39with Table; 40with Targparm; 41with Types; 42 43with Ada.Command_Line; use Ada.Command_Line; 44with Ada.Exceptions; use Ada.Exceptions; 45 46with System.OS_Lib; use System.OS_Lib; 47with System.CRTL; 48 49with Interfaces.C_Streams; use Interfaces.C_Streams; 50with Interfaces.C.Strings; use Interfaces.C.Strings; 51 52procedure Gnatlink is 53 pragma Ident (Gnatvsn.Gnat_Static_Version_String); 54 55 Shared_Libgcc_String : constant String := "-shared-libgcc"; 56 Shared_Libgcc : constant String_Access := 57 new String'(Shared_Libgcc_String); 58 -- Used to invoke gcc when the binder is invoked with -shared 59 60 Static_Libgcc_String : constant String := "-static-libgcc"; 61 Static_Libgcc : constant String_Access := 62 new String'(Static_Libgcc_String); 63 -- Used to invoke gcc when shared libs are not used 64 65 package Gcc_Linker_Options is new Table.Table ( 66 Table_Component_Type => String_Access, 67 Table_Index_Type => Integer, 68 Table_Low_Bound => 1, 69 Table_Initial => 20, 70 Table_Increment => 100, 71 Table_Name => "Gnatlink.Gcc_Linker_Options"); 72 -- Comments needed ??? 73 74 package Libpath is new Table.Table ( 75 Table_Component_Type => Character, 76 Table_Index_Type => Integer, 77 Table_Low_Bound => 1, 78 Table_Initial => 4096, 79 Table_Increment => 100, 80 Table_Name => "Gnatlink.Libpath"); 81 -- Comments needed ??? 82 83 package Linker_Options is new Table.Table ( 84 Table_Component_Type => String_Access, 85 Table_Index_Type => Integer, 86 Table_Low_Bound => 1, 87 Table_Initial => 20, 88 Table_Increment => 100, 89 Table_Name => "Gnatlink.Linker_Options"); 90 -- Comments needed ??? 91 92 package Linker_Objects is new Table.Table ( 93 Table_Component_Type => String_Access, 94 Table_Index_Type => Integer, 95 Table_Low_Bound => 1, 96 Table_Initial => 20, 97 Table_Increment => 100, 98 Table_Name => "Gnatlink.Linker_Objects"); 99 -- This table collects the objects file to be passed to the linker. In the 100 -- case where the linker command line is too long then programs objects 101 -- are put on the Response_File_Objects table. Note that the binder object 102 -- file and the user's objects remain in this table. This is very 103 -- important because on the GNU linker command line the -L switch is not 104 -- used to look for objects files but -L switch is used to look for 105 -- objects listed in the response file. This is not a problem with the 106 -- applications objects as they are specified with a full name. 107 108 package Response_File_Objects is new Table.Table ( 109 Table_Component_Type => String_Access, 110 Table_Index_Type => Integer, 111 Table_Low_Bound => 1, 112 Table_Initial => 20, 113 Table_Increment => 100, 114 Table_Name => "Gnatlink.Response_File_Objects"); 115 -- This table collects the objects file that are to be put in the response 116 -- file. Only application objects are collected there (see details in 117 -- Linker_Objects table comments) 118 119 package Binder_Options_From_ALI is new Table.Table ( 120 Table_Component_Type => String_Access, 121 Table_Index_Type => Integer, 122 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn 123 Table_Initial => 20, 124 Table_Increment => 100, 125 Table_Name => "Gnatlink.Binder_Options_From_ALI"); 126 -- This table collects the switches from the ALI file of the main 127 -- subprogram. 128 129 package Binder_Options is new Table.Table ( 130 Table_Component_Type => String_Access, 131 Table_Index_Type => Integer, 132 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn 133 Table_Initial => 20, 134 Table_Increment => 100, 135 Table_Name => "Gnatlink.Binder_Options"); 136 -- This table collects the arguments to be passed to compile the binder 137 -- generated file. 138 139 Gcc : String_Access := Program_Name ("ada", "gnatlink"); 140 141 Read_Mode : constant String := "r" & ASCII.NUL; 142 143 Begin_Info : constant String := "-- BEGIN Object file/option list"; 144 End_Info : constant String := "-- END Object file/option list "; 145 146 Gcc_Path : String_Access; 147 Linker_Path : String_Access; 148 Output_File_Name : String_Access; 149 Ali_File_Name : String_Access; 150 Binder_Spec_Src_File : String_Access; 151 Binder_Body_Src_File : String_Access; 152 Binder_Ali_File : String_Access; 153 Binder_Obj_File : String_Access; 154 155 Base_Command_Name : String_Access; 156 157 Target_Debuggable_Suffix : String_Access; 158 159 Tname : Temp_File_Name; 160 Tname_FD : File_Descriptor := Invalid_FD; 161 -- Temporary file used by linker to pass list of object files on 162 -- certain systems with limitations on size of arguments. 163 164 Debug_Flag_Present : Boolean := False; 165 Verbose_Mode : Boolean := False; 166 Very_Verbose_Mode : Boolean := False; 167 168 Standard_Gcc : Boolean := True; 169 170 Compile_Bind_File : Boolean := True; 171 -- Set to False if bind file is not to be compiled 172 173 Create_Map_File : Boolean := False; 174 -- Set to True by switch -M. The map file name is derived from 175 -- the ALI file name (mainprog.ali => mainprog.map). 176 177 Object_List_File_Supported : Boolean; 178 for Object_List_File_Supported'Size use Character'Size; 179 pragma Import 180 (C, Object_List_File_Supported, "__gnat_objlist_file_supported"); 181 -- Predicate indicating whether the linker has an option whereby the 182 -- names of object files can be passed to the linker in a file. 183 184 Object_File_Option_Ptr : Interfaces.C.Strings.chars_ptr; 185 pragma Import (C, Object_File_Option_Ptr, "__gnat_object_file_option"); 186 -- Pointer to a string representing the linker option which specifies 187 -- the response file. 188 189 Object_File_Option : constant String := Value (Object_File_Option_Ptr); 190 -- The linker option which specifies the response file as a string 191 192 Using_GNU_response_file : constant Boolean := 193 Object_File_Option'Length > 0 194 and then Object_File_Option (Object_File_Option'Last) = '@'; 195 -- Whether a GNU response file is used 196 197 Object_List_File_Required : Boolean := False; 198 -- Set to True to force generation of a response file 199 200 Shared_Libgcc_Default : Character; 201 for Shared_Libgcc_Default'Size use Character'Size; 202 pragma Import 203 (C, Shared_Libgcc_Default, "__gnat_shared_libgcc_default"); 204 -- Indicates wether libgcc should be statically linked (use 'T') or 205 -- dynamically linked (use 'H') by default. 206 207 function Base_Name (File_Name : String) return String; 208 -- Return just the file name part without the extension (if present) 209 210 procedure Check_Existing_Executable (File_Name : String); 211 -- Delete any existing executable to avoid accidentally updating the target 212 -- of a symbolic link, but produce a Fatail_Error if File_Name matches any 213 -- of the source file names. This avoids overwriting of extensionless 214 -- source files by accident on systems where executables do not have 215 -- extensions. 216 217 procedure Delete (Name : String); 218 -- Wrapper to unlink as status is ignored by this application 219 220 procedure Error_Msg (Message : String); 221 -- Output the error or warning Message 222 223 procedure Exit_With_Error (Error : String); 224 -- Output Error and exit program with a fatal condition 225 226 procedure Process_Args; 227 -- Go through all the arguments and build option tables 228 229 procedure Process_Binder_File (Name : String); 230 -- Reads the binder file and extracts linker arguments 231 232 procedure Usage; 233 -- Display usage 234 235 procedure Write_Header; 236 -- Show user the program name, version and copyright 237 238 procedure Write_Usage; 239 -- Show user the program options 240 241 --------------- 242 -- Base_Name -- 243 --------------- 244 245 function Base_Name (File_Name : String) return String is 246 Findex1 : Natural; 247 Findex2 : Natural; 248 249 begin 250 Findex1 := File_Name'First; 251 252 -- The file might be specified by a full path name. However, 253 -- we want the path to be stripped away. 254 255 for J in reverse File_Name'Range loop 256 if Is_Directory_Separator (File_Name (J)) then 257 Findex1 := J + 1; 258 exit; 259 end if; 260 end loop; 261 262 Findex2 := File_Name'Last; 263 while Findex2 > Findex1 and then File_Name (Findex2) /= '.' loop 264 Findex2 := Findex2 - 1; 265 end loop; 266 267 if Findex2 = Findex1 then 268 Findex2 := File_Name'Last + 1; 269 end if; 270 271 return File_Name (Findex1 .. Findex2 - 1); 272 end Base_Name; 273 274 ------------------------------- 275 -- Check_Existing_Executable -- 276 ------------------------------- 277 278 procedure Check_Existing_Executable (File_Name : String) is 279 Ename : String := File_Name; 280 Efile : File_Name_Type; 281 Sfile : File_Name_Type; 282 283 begin 284 Canonical_Case_File_Name (Ename); 285 Name_Len := 0; 286 Add_Str_To_Name_Buffer (Ename); 287 Efile := Name_Find; 288 289 for J in Units.Table'First .. Units.Last loop 290 Sfile := Units.Table (J).Sfile; 291 if Sfile = Efile then 292 Exit_With_Error 293 ("executable name """ & File_Name & """ matches " 294 & "source file name """ & Get_Name_String (Sfile) & """"); 295 end if; 296 end loop; 297 298 Delete (File_Name); 299 end Check_Existing_Executable; 300 301 ------------ 302 -- Delete -- 303 ------------ 304 305 procedure Delete (Name : String) is 306 Status : int; 307 pragma Unreferenced (Status); 308 begin 309 Status := unlink (Name'Address); 310 -- Is it really right to ignore an error here ??? 311 end Delete; 312 313 --------------- 314 -- Error_Msg -- 315 --------------- 316 317 procedure Error_Msg (Message : String) is 318 begin 319 Write_Str (Base_Command_Name.all); 320 Write_Str (": "); 321 Write_Str (Message); 322 Write_Eol; 323 end Error_Msg; 324 325 --------------------- 326 -- Exit_With_Error -- 327 --------------------- 328 329 procedure Exit_With_Error (Error : String) is 330 begin 331 Error_Msg (Error); 332 Exit_Program (E_Fatal); 333 end Exit_With_Error; 334 335 ------------------ 336 -- Process_Args -- 337 ------------------ 338 339 procedure Process_Args is 340 Next_Arg : Integer; 341 342 Skip_Next : Boolean := False; 343 -- Set to true if the next argument is to be added into the list of 344 -- linker's argument without parsing it. 345 346 procedure Check_Version_And_Help is new Check_Version_And_Help_G (Usage); 347 348 -- Start of processing for Process_Args 349 350 begin 351 -- First, check for --version and --help 352 353 Check_Version_And_Help ("GNATLINK", "1996"); 354 355 -- Loop through arguments of gnatlink command 356 357 Next_Arg := 1; 358 loop 359 exit when Next_Arg > Argument_Count; 360 361 Process_One_Arg : declare 362 Arg : constant String := Argument (Next_Arg); 363 364 begin 365 -- Case of argument which is a switch 366 367 -- We definitely need section by section comments here ??? 368 369 if Skip_Next then 370 371 -- This argument must not be parsed, just add it to the 372 -- list of linker's options. 373 374 Skip_Next := False; 375 376 Linker_Options.Increment_Last; 377 Linker_Options.Table (Linker_Options.Last) := 378 new String'(Arg); 379 380 elsif Arg'Length /= 0 and then Arg (1) = '-' then 381 if Arg'Length > 4 and then Arg (2 .. 5) = "gnat" then 382 Exit_With_Error 383 ("invalid switch: """ & Arg & """ (gnat not needed here)"); 384 end if; 385 386 if Arg = "-Xlinker" then 387 388 -- Next argument should be sent directly to the linker. 389 -- We do not want to parse it here. 390 391 Skip_Next := True; 392 393 Linker_Options.Increment_Last; 394 Linker_Options.Table (Linker_Options.Last) := 395 new String'(Arg); 396 397 elsif Arg (2) = 'g' 398 and then (Arg'Length < 5 or else Arg (2 .. 5) /= "gnat") 399 then 400 Debug_Flag_Present := True; 401 402 Linker_Options.Increment_Last; 403 Linker_Options.Table (Linker_Options.Last) := 404 new String'(Arg); 405 406 Binder_Options.Increment_Last; 407 Binder_Options.Table (Binder_Options.Last) := 408 Linker_Options.Table (Linker_Options.Last); 409 410 elsif Arg'Length >= 3 and then Arg (2) = 'M' then 411 declare 412 Switches : String_List_Access; 413 414 begin 415 Convert (Map_File, Arg (3 .. Arg'Last), Switches); 416 417 if Switches /= null then 418 for J in Switches'Range loop 419 Linker_Options.Increment_Last; 420 Linker_Options.Table (Linker_Options.Last) := 421 Switches (J); 422 end loop; 423 end if; 424 end; 425 426 elsif Arg'Length = 2 then 427 case Arg (2) is 428 when 'f' => 429 if Object_List_File_Supported then 430 Object_List_File_Required := True; 431 else 432 Exit_With_Error 433 ("Object list file not supported on this target"); 434 end if; 435 436 when 'M' => 437 Create_Map_File := True; 438 439 when 'n' => 440 Compile_Bind_File := False; 441 442 when 'o' => 443 Next_Arg := Next_Arg + 1; 444 445 if Next_Arg > Argument_Count then 446 Exit_With_Error ("Missing argument for -o"); 447 end if; 448 449 Output_File_Name := 450 new String'(Executable_Name 451 (Argument (Next_Arg), 452 Only_If_No_Suffix => True)); 453 454 when 'P' => 455 Opt.CodePeer_Mode := True; 456 457 when 'R' => 458 Opt.Run_Path_Option := False; 459 460 when 'v' => 461 462 -- Support "double" verbose mode. Second -v 463 -- gets sent to the linker and binder phases. 464 465 if Verbose_Mode then 466 Very_Verbose_Mode := True; 467 468 Linker_Options.Increment_Last; 469 Linker_Options.Table (Linker_Options.Last) := 470 new String'(Arg); 471 472 Binder_Options.Increment_Last; 473 Binder_Options.Table (Binder_Options.Last) := 474 Linker_Options.Table (Linker_Options.Last); 475 476 else 477 Verbose_Mode := True; 478 479 end if; 480 481 when others => 482 Linker_Options.Increment_Last; 483 Linker_Options.Table (Linker_Options.Last) := 484 new String'(Arg); 485 486 end case; 487 488 elsif Arg (2) = 'B' then 489 Linker_Options.Increment_Last; 490 Linker_Options.Table (Linker_Options.Last) := 491 new String'(Arg); 492 493 Binder_Options.Increment_Last; 494 Binder_Options.Table (Binder_Options.Last) := 495 Linker_Options.Table (Linker_Options.Last); 496 497 elsif Arg'Length >= 7 and then Arg (1 .. 7) = "--LINK=" then 498 if Arg'Length = 7 then 499 Exit_With_Error ("Missing argument for --LINK="); 500 end if; 501 502 declare 503 L_Args : constant Argument_List_Access := 504 Argument_String_To_List (Arg (8 .. Arg'Last)); 505 begin 506 -- The linker program is the first argument 507 508 Linker_Path := 509 System.OS_Lib.Locate_Exec_On_Path (L_Args.all (1).all); 510 511 if Linker_Path = null then 512 Exit_With_Error 513 ("Could not locate linker: " & L_Args.all (1).all); 514 end if; 515 516 -- The other arguments are passed as-is to the linker and 517 -- override those coming from --GCC= if any. 518 519 if L_Args.all'Last >= 2 then 520 Gcc_Linker_Options.Set_Last (0); 521 end if; 522 523 for J in 2 .. L_Args.all'Last loop 524 Gcc_Linker_Options.Increment_Last; 525 Gcc_Linker_Options.Table 526 (Gcc_Linker_Options.Last) := 527 new String'(L_Args.all (J).all); 528 end loop; 529 end; 530 531 elsif Arg'Length >= 6 and then Arg (1 .. 6) = "--GCC=" then 532 if Arg'Length = 6 then 533 Exit_With_Error ("Missing argument for --GCC="); 534 end if; 535 536 declare 537 Program_Args : constant Argument_List_Access := 538 Argument_String_To_List 539 (Arg (7 .. Arg'Last)); 540 541 begin 542 if Program_Args.all (1).all /= Gcc.all then 543 Gcc := new String'(Program_Args.all (1).all); 544 Standard_Gcc := False; 545 end if; 546 547 -- Set appropriate flags for switches passed 548 549 for J in 2 .. Program_Args.all'Last loop 550 declare 551 Arg : constant String := Program_Args.all (J).all; 552 AF : constant Integer := Arg'First; 553 554 begin 555 if Arg'Length /= 0 and then Arg (AF) = '-' then 556 if Arg (AF + 1) = 'g' 557 and then (Arg'Length = 2 558 or else Arg (AF + 2) in '0' .. '3' 559 or else Arg (AF + 2 .. Arg'Last) = "coff") 560 then 561 Debug_Flag_Present := True; 562 end if; 563 end if; 564 565 -- Add directory to source search dirs so that 566 -- Get_Target_Parameters can find system.ads 567 568 if Arg (AF .. AF + 1) = "-I" 569 and then Arg'Length > 2 570 then 571 Add_Src_Search_Dir (Arg (AF + 2 .. Arg'Last)); 572 end if; 573 574 -- Pass to gcc for compiling binder generated file 575 -- No use passing libraries, it will just generate 576 -- a warning 577 578 if not (Arg (AF .. AF + 1) = "-l" 579 or else Arg (AF .. AF + 1) = "-L") 580 then 581 Binder_Options.Increment_Last; 582 Binder_Options.Table (Binder_Options.Last) := 583 new String'(Arg); 584 end if; 585 586 -- Pass to gcc for linking program 587 588 Gcc_Linker_Options.Increment_Last; 589 Gcc_Linker_Options.Table 590 (Gcc_Linker_Options.Last) := new String'(Arg); 591 end; 592 end loop; 593 end; 594 595 -- Send all multi-character switches not recognized as 596 -- a special case by gnatlink to the linker/loader stage. 597 598 else 599 Linker_Options.Increment_Last; 600 Linker_Options.Table (Linker_Options.Last) := 601 new String'(Arg); 602 end if; 603 604 -- Here if argument is a file name rather than a switch 605 606 else 607 -- If explicit ali file, capture it 608 609 if Arg'Length > 4 610 and then Arg (Arg'Last - 3 .. Arg'Last) = ".ali" 611 then 612 if Ali_File_Name = null then 613 Ali_File_Name := new String'(Arg); 614 else 615 Exit_With_Error ("cannot handle more than one ALI file"); 616 end if; 617 618 -- If target object file, record object file 619 620 elsif Arg'Length > Get_Target_Object_Suffix.all'Length 621 and then Arg 622 (Arg'Last - 623 Get_Target_Object_Suffix.all'Length + 1 .. Arg'Last) 624 = Get_Target_Object_Suffix.all 625 then 626 Linker_Objects.Increment_Last; 627 Linker_Objects.Table (Linker_Objects.Last) := 628 new String'(Arg); 629 630 -- If host object file, record object file 631 632 elsif Arg'Length > Get_Object_Suffix.all'Length 633 and then Arg 634 (Arg'Last - Get_Object_Suffix.all'Length + 1 .. Arg'Last) 635 = Get_Object_Suffix.all 636 then 637 Linker_Objects.Increment_Last; 638 Linker_Objects.Table (Linker_Objects.Last) := 639 new String'(Arg); 640 641 -- If corresponding ali file exists, capture it 642 643 elsif Ali_File_Name = null 644 and then Is_Regular_File (Arg & ".ali") 645 then 646 Ali_File_Name := new String'(Arg & ".ali"); 647 648 -- Otherwise assume this is a linker options entry, but 649 -- see below for interesting adjustment to this assumption. 650 651 else 652 Linker_Options.Increment_Last; 653 Linker_Options.Table (Linker_Options.Last) := 654 new String'(Arg); 655 end if; 656 end if; 657 end Process_One_Arg; 658 659 Next_Arg := Next_Arg + 1; 660 end loop; 661 662 -- Compile the bind file with warnings suppressed, because 663 -- otherwise the with of the main program may cause junk warnings. 664 665 Binder_Options.Increment_Last; 666 Binder_Options.Table (Binder_Options.Last) := new String'("-gnatws"); 667 668 -- If we did not get an ali file at all, and we had at least one 669 -- linker option, then assume that was the intended ali file after 670 -- all, so that we get a nicer message later on. 671 672 if Ali_File_Name = null 673 and then Linker_Options.Last >= Linker_Options.First 674 then 675 Ali_File_Name := 676 new String'(Linker_Options.Table (Linker_Options.First).all 677 & ".ali"); 678 end if; 679 end Process_Args; 680 681 ------------------------- 682 -- Process_Binder_File -- 683 ------------------------- 684 685 procedure Process_Binder_File (Name : String) is 686 Fd : FILEs; 687 -- Binder file's descriptor 688 689 Link_Bytes : Integer := 0; 690 -- Projected number of bytes for the linker command line 691 692 Link_Max : Integer; 693 pragma Import (C, Link_Max, "__gnat_link_max"); 694 -- Maximum number of bytes on the command line supported by the OS 695 -- linker. Passed this limit the response file mechanism must be used 696 -- if supported. 697 698 Next_Line : String (1 .. 1000); 699 -- Current line value 700 701 Nlast : Integer; 702 Nfirst : Integer; 703 -- Current line slice (the slice does not contain line terminator) 704 705 Last : Integer; 706 -- Current line last character for shared libraries (without version) 707 708 Objs_Begin : Integer := 0; 709 -- First object file index in Linker_Objects table 710 711 Objs_End : Integer := 0; 712 -- Last object file index in Linker_Objects table 713 714 Status : int; 715 pragma Warnings (Off, Status); 716 -- Used for various Interfaces.C_Streams calls 717 718 Closing_Status : Boolean; 719 pragma Warnings (Off, Closing_Status); 720 -- For call to Close 721 722 GNAT_Static : Boolean := False; 723 -- Save state of -static option 724 725 GNAT_Shared : Boolean := False; 726 -- Save state of -shared option 727 728 Xlinker_Was_Previous : Boolean := False; 729 -- Indicate that "-Xlinker" was the option preceding the current option. 730 -- If True, then the current option is never suppressed. 731 732 -- Rollback data 733 734 -- These data items are used to store current binder file context. The 735 -- context is composed of the file descriptor position and the current 736 -- line together with the slice indexes (first and last position) for 737 -- this line. The rollback data are used by the Store_File_Context and 738 -- Rollback_File_Context routines below. The file context mechanism 739 -- interact only with the Get_Next_Line call. For example: 740 741 -- Store_File_Context; 742 -- Get_Next_Line; 743 -- Rollback_File_Context; 744 -- Get_Next_Line; 745 746 -- Both Get_Next_Line calls above will read the exact same data from 747 -- the file. In other words, Next_Line, Nfirst and Nlast variables 748 -- will be set with the exact same values. 749 750 RB_File_Pos : long; -- File position 751 RB_Next_Line : String (1 .. 1000); -- Current line content 752 RB_Nlast : Integer; -- Slice last index 753 RB_Nfirst : Integer; -- Slice first index 754 755 Run_Path_Option_Ptr : Interfaces.C.Strings.chars_ptr; 756 pragma Import (C, Run_Path_Option_Ptr, "__gnat_run_path_option"); 757 -- Pointer to string representing the native linker option which 758 -- specifies the path where the dynamic loader should find shared 759 -- libraries. Equal to null string if this system doesn't support it. 760 761 Libgcc_Subdir_Ptr : Interfaces.C.Strings.chars_ptr; 762 pragma Import (C, Libgcc_Subdir_Ptr, "__gnat_default_libgcc_subdir"); 763 -- Pointer to string indicating the installation subdirectory where 764 -- a default shared libgcc might be found. 765 766 Object_Library_Ext_Ptr : Interfaces.C.Strings.chars_ptr; 767 pragma Import 768 (C, Object_Library_Ext_Ptr, "__gnat_object_library_extension"); 769 -- Pointer to string specifying the default extension for 770 -- object libraries, e.g. Unix uses ".a". 771 772 Separate_Run_Path_Options : Boolean; 773 for Separate_Run_Path_Options'Size use Character'Size; 774 pragma Import 775 (C, Separate_Run_Path_Options, "__gnat_separate_run_path_options"); 776 -- Whether separate rpath options should be emitted for each directory 777 778 procedure Get_Next_Line; 779 -- Read the next line from the binder file without the line 780 -- terminator. 781 782 function Index (S, Pattern : String) return Natural; 783 -- Return the last occurrence of Pattern in S, or 0 if none 784 785 procedure Store_File_Context; 786 -- Store current file context, Fd position and current line data. 787 -- The file context is stored into the rollback data above (RB_*). 788 -- Store_File_Context can be called at any time, only the last call 789 -- will be used (i.e. this routine overwrites the file context). 790 791 procedure Rollback_File_Context; 792 -- Restore file context from rollback data. This routine must be called 793 -- after Store_File_Context. The binder file context will be restored 794 -- with the data stored by the last Store_File_Context call. 795 796 procedure Write_RF (S : String); 797 -- Write a string to the response file and check if it was successful. 798 -- Fail the program if it was not successful (disk full). 799 800 ------------------- 801 -- Get_Next_Line -- 802 ------------------- 803 804 procedure Get_Next_Line is 805 Fchars : chars; 806 807 begin 808 Fchars := fgets (Next_Line'Address, Next_Line'Length, Fd); 809 810 if Fchars = System.Null_Address then 811 Exit_With_Error ("Error reading binder output"); 812 end if; 813 814 Nfirst := Next_Line'First; 815 Nlast := Nfirst; 816 while Nlast <= Next_Line'Last 817 and then Next_Line (Nlast) /= ASCII.LF 818 and then Next_Line (Nlast) /= ASCII.CR 819 loop 820 Nlast := Nlast + 1; 821 end loop; 822 823 Nlast := Nlast - 1; 824 end Get_Next_Line; 825 826 ----------- 827 -- Index -- 828 ----------- 829 830 function Index (S, Pattern : String) return Natural is 831 Len : constant Natural := Pattern'Length; 832 833 begin 834 for J in reverse S'First .. S'Last - Len + 1 loop 835 if Pattern = S (J .. J + Len - 1) then 836 return J; 837 end if; 838 end loop; 839 840 return 0; 841 end Index; 842 843 --------------------------- 844 -- Rollback_File_Context -- 845 --------------------------- 846 847 procedure Rollback_File_Context is 848 begin 849 Next_Line := RB_Next_Line; 850 Nfirst := RB_Nfirst; 851 Nlast := RB_Nlast; 852 Status := fseek (Fd, RB_File_Pos, Interfaces.C_Streams.SEEK_SET); 853 854 if Status = -1 then 855 Exit_With_Error ("Error setting file position"); 856 end if; 857 end Rollback_File_Context; 858 859 ------------------------ 860 -- Store_File_Context -- 861 ------------------------ 862 863 procedure Store_File_Context is 864 use type System.CRTL.long; 865 866 begin 867 RB_Next_Line := Next_Line; 868 RB_Nfirst := Nfirst; 869 RB_Nlast := Nlast; 870 RB_File_Pos := ftell (Fd); 871 872 if RB_File_Pos = -1 then 873 Exit_With_Error ("Error getting file position"); 874 end if; 875 end Store_File_Context; 876 877 -------------- 878 -- Write_RF -- 879 -------------- 880 881 procedure Write_RF (S : String) is 882 Success : Boolean := True; 883 Back_Slash : constant Character := '\'; 884 885 begin 886 -- If a GNU response file is used, space and backslash need to be 887 -- escaped because they are interpreted as a string separator and 888 -- an escape character respectively by the underlying mechanism. 889 -- On the other hand, quote and double-quote are not escaped since 890 -- they are interpreted as string delimiters on both sides. 891 892 if Using_GNU_response_file then 893 for J in S'Range loop 894 if S (J) = ' ' or else S (J) = '\' then 895 if Write (Tname_FD, Back_Slash'Address, 1) /= 1 then 896 Success := False; 897 end if; 898 end if; 899 900 if Write (Tname_FD, S (J)'Address, 1) /= 1 then 901 Success := False; 902 end if; 903 end loop; 904 905 else 906 if Write (Tname_FD, S'Address, S'Length) /= S'Length then 907 Success := False; 908 end if; 909 end if; 910 911 if Write (Tname_FD, ASCII.LF'Address, 1) /= 1 then 912 Success := False; 913 end if; 914 915 if not Success then 916 Exit_With_Error ("Error generating response file: disk full"); 917 end if; 918 end Write_RF; 919 920 -- Start of processing for Process_Binder_File 921 922 begin 923 Fd := fopen (Name'Address, Read_Mode'Address); 924 925 if Fd = NULL_Stream then 926 Exit_With_Error ("Failed to open binder output"); 927 end if; 928 929 -- Skip up to the Begin Info line 930 931 loop 932 Get_Next_Line; 933 exit when Next_Line (Nfirst .. Nlast) = Begin_Info; 934 end loop; 935 936 loop 937 Get_Next_Line; 938 939 -- Go to end when end line is reached (this will happen in 940 -- High_Integrity_Mode where no -L switches are generated) 941 942 exit when Next_Line (Nfirst .. Nlast) = End_Info; 943 944 Next_Line (Nfirst .. Nlast - 8) := Next_Line (Nfirst + 8 .. Nlast); 945 Nlast := Nlast - 8; 946 947 -- Go to next section when switches are reached 948 949 exit when Next_Line (1) = '-'; 950 951 -- Otherwise we have another object file to collect 952 953 Linker_Objects.Increment_Last; 954 955 -- Mark the positions of first and last object files in case they 956 -- need to be placed with a named file on systems having linker 957 -- line limitations. 958 959 if Objs_Begin = 0 then 960 Objs_Begin := Linker_Objects.Last; 961 end if; 962 963 Linker_Objects.Table (Linker_Objects.Last) := 964 new String'(Next_Line (Nfirst .. Nlast)); 965 966 -- Nlast - Nfirst + 1, for the size, plus one for the space between 967 -- each arguments. 968 969 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2; 970 end loop; 971 972 Objs_End := Linker_Objects.Last; 973 974 -- Continue to compute the Link_Bytes, the linker options are part of 975 -- command line length. 976 977 Store_File_Context; 978 979 while Next_Line (Nfirst .. Nlast) /= End_Info loop 980 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2; 981 Get_Next_Line; 982 end loop; 983 984 Rollback_File_Context; 985 986 -- On systems that have limitations on handling very long linker lines 987 -- we make use of the system linker option which takes a list of object 988 -- file names from a file instead of the command line itself. What we do 989 -- is to replace the list of object files by the special linker option 990 -- which then reads the object file list from a file instead. The option 991 -- to read from a file instead of the command line is only triggered if 992 -- a conservative threshold is passed. 993 994 if Object_List_File_Required 995 or else (Object_List_File_Supported 996 and then Link_Bytes > Link_Max) 997 then 998 -- Create a temporary file containing the Ada user object files 999 -- needed by the link. This list is taken from the bind file and is 1000 -- output one object per line for maximal compatibility with linkers 1001 -- supporting this option. 1002 1003 Create_Temp_File (Tname_FD, Tname); 1004 1005 -- ??? File descriptor should be checked to not be Invalid_FD. 1006 -- ??? Status of Write and Close operations should be checked, and 1007 -- failure should occur if a status is wrong. 1008 1009 for J in Objs_Begin .. Objs_End loop 1010 Write_RF (Linker_Objects.Table (J).all); 1011 1012 Response_File_Objects.Increment_Last; 1013 Response_File_Objects.Table (Response_File_Objects.Last) := 1014 Linker_Objects.Table (J); 1015 end loop; 1016 1017 Close (Tname_FD, Closing_Status); 1018 1019 -- Add the special objects list file option together with the name 1020 -- of the temporary file (removing the null character) to the objects 1021 -- file table. 1022 1023 Linker_Objects.Table (Objs_Begin) := 1024 new String'(Object_File_Option & 1025 Tname (Tname'First .. Tname'Last - 1)); 1026 1027 -- The slots containing these object file names are then removed 1028 -- from the objects table so they do not appear in the link. They are 1029 -- removed by moving up the linker options and non-Ada object files 1030 -- appearing after the Ada object list in the table. 1031 1032 declare 1033 N : Integer; 1034 1035 begin 1036 N := Objs_End - Objs_Begin + 1; 1037 1038 for J in Objs_End + 1 .. Linker_Objects.Last loop 1039 Linker_Objects.Table (J - N + 1) := Linker_Objects.Table (J); 1040 end loop; 1041 1042 Linker_Objects.Set_Last (Linker_Objects.Last - N + 1); 1043 end; 1044 end if; 1045 1046 -- Process switches and options 1047 1048 if Next_Line (Nfirst .. Nlast) /= End_Info then 1049 Xlinker_Was_Previous := False; 1050 1051 loop 1052 if Xlinker_Was_Previous 1053 or else Next_Line (Nfirst .. Nlast) = "-Xlinker" 1054 then 1055 Linker_Options.Increment_Last; 1056 Linker_Options.Table (Linker_Options.Last) := 1057 new String'(Next_Line (Nfirst .. Nlast)); 1058 1059 elsif Next_Line (Nfirst .. Nlast) = "-static" then 1060 GNAT_Static := True; 1061 1062 elsif Next_Line (Nfirst .. Nlast) = "-shared" then 1063 GNAT_Shared := True; 1064 1065 -- Add binder options only if not already set on the command line. 1066 -- This rule is a way to control the linker options order. 1067 1068 else 1069 if Nlast > Nfirst + 2 and then 1070 Next_Line (Nfirst .. Nfirst + 1) = "-L" 1071 then 1072 -- Construct a library search path for use later to locate 1073 -- static gnatlib libraries. 1074 1075 if Libpath.Last > 1 then 1076 Libpath.Increment_Last; 1077 Libpath.Table (Libpath.Last) := Path_Separator; 1078 end if; 1079 1080 for I in Nfirst + 2 .. Nlast loop 1081 Libpath.Increment_Last; 1082 Libpath.Table (Libpath.Last) := Next_Line (I); 1083 end loop; 1084 1085 Linker_Options.Increment_Last; 1086 1087 Linker_Options.Table (Linker_Options.Last) := 1088 new String'(Next_Line (Nfirst .. Nlast)); 1089 1090 elsif Next_Line (Nfirst .. Nlast) = "-lgnarl" 1091 or else Next_Line (Nfirst .. Nlast) = "-lgnat" 1092 or else 1093 Next_Line 1094 (1 .. Natural'Min (Nlast, 8 + Library_Version'Length)) = 1095 Shared_Lib ("gnarl") 1096 or else 1097 Next_Line 1098 (1 .. Natural'Min (Nlast, 7 + Library_Version'Length)) = 1099 Shared_Lib ("gnat") 1100 then 1101 -- If it is a shared library, remove the library version. 1102 -- We will be looking for the static version of the library 1103 -- as it is in the same directory as the shared version. 1104 1105 if Nlast >= Library_Version'Length 1106 and then 1107 Next_Line (Nlast - Library_Version'Length + 1 .. Nlast) = 1108 Library_Version 1109 then 1110 -- Set Last to point to last character before the 1111 -- library version. 1112 1113 Last := Nlast - Library_Version'Length - 1; 1114 else 1115 Last := Nlast; 1116 end if; 1117 1118 -- Given a Gnat standard library, search the library path to 1119 -- find the library location. 1120 1121 -- Shouldn't we abstract a proc here, we are getting awfully 1122 -- heavily nested ??? 1123 1124 declare 1125 File_Path : String_Access; 1126 1127 Object_Lib_Extension : constant String := 1128 Value (Object_Library_Ext_Ptr); 1129 1130 File_Name : constant String := "lib" & 1131 Next_Line (Nfirst + 2 .. Last) & Object_Lib_Extension; 1132 1133 Run_Path_Opt : constant String := 1134 Value (Run_Path_Option_Ptr); 1135 1136 GCC_Index : Natural; 1137 Run_Path_Opt_Index : Natural := 0; 1138 1139 begin 1140 File_Path := 1141 Locate_Regular_File (File_Name, 1142 String (Libpath.Table (1 .. Libpath.Last))); 1143 1144 if File_Path /= null then 1145 if GNAT_Static then 1146 1147 -- If static gnatlib found, explicitly specify to 1148 -- overcome possible linker default usage of shared 1149 -- version. 1150 1151 Linker_Options.Increment_Last; 1152 1153 Linker_Options.Table (Linker_Options.Last) := 1154 new String'(File_Path.all); 1155 1156 elsif GNAT_Shared then 1157 if Opt.Run_Path_Option then 1158 1159 -- If shared gnatlib desired, add appropriate 1160 -- system specific switch so that it can be 1161 -- located at runtime. 1162 1163 if Run_Path_Opt'Length /= 0 then 1164 1165 -- Output the system specific linker command 1166 -- that allows the image activator to find 1167 -- the shared library at runtime. Also add 1168 -- path to find libgcc_s.so, if relevant. 1169 1170 declare 1171 Path : String (1 .. File_Path'Length + 15); 1172 1173 Path_Last : constant Natural := 1174 File_Path'Length; 1175 1176 begin 1177 Path (1 .. File_Path'Length) := 1178 File_Path.all; 1179 1180 -- To find the location of the shared version 1181 -- of libgcc, we look for "gcc-lib" in the 1182 -- path of the library. However, this 1183 -- subdirectory is no longer present in 1184 -- recent versions of GCC. So, we look for 1185 -- the last subdirectory "lib" in the path. 1186 1187 GCC_Index := 1188 Index (Path (1 .. Path_Last), "gcc-lib"); 1189 1190 if GCC_Index /= 0 then 1191 1192 -- The shared version of libgcc is 1193 -- located in the parent directory. 1194 1195 GCC_Index := GCC_Index - 1; 1196 1197 else 1198 GCC_Index := 1199 Index 1200 (Path (1 .. Path_Last), 1201 "/lib/"); 1202 1203 if GCC_Index = 0 then 1204 GCC_Index := 1205 Index (Path (1 .. Path_Last), 1206 Directory_Separator & "lib" 1207 & Directory_Separator); 1208 end if; 1209 1210 -- If we have found a "lib" subdir in 1211 -- the path to libgnat, the possible 1212 -- shared libgcc of interest by default 1213 -- is in libgcc_subdir at the same 1214 -- level. 1215 1216 if GCC_Index /= 0 then 1217 declare 1218 Subdir : constant String := 1219 Value (Libgcc_Subdir_Ptr); 1220 begin 1221 Path 1222 (GCC_Index + 1 .. 1223 GCC_Index + Subdir'Length) := 1224 Subdir; 1225 GCC_Index := 1226 GCC_Index + Subdir'Length; 1227 end; 1228 end if; 1229 end if; 1230 1231 -- Look for an eventual run_path_option in 1232 -- the linker switches. 1233 1234 if Separate_Run_Path_Options then 1235 Linker_Options.Increment_Last; 1236 Linker_Options.Table 1237 (Linker_Options.Last) := 1238 new String' 1239 (Run_Path_Opt 1240 & File_Path 1241 (1 .. File_Path'Length 1242 - File_Name'Length)); 1243 1244 if GCC_Index /= 0 then 1245 Linker_Options.Increment_Last; 1246 Linker_Options.Table 1247 (Linker_Options.Last) := 1248 new String' 1249 (Run_Path_Opt 1250 & Path (1 .. GCC_Index)); 1251 end if; 1252 1253 else 1254 for J in reverse 1255 1 .. Linker_Options.Last 1256 loop 1257 if Linker_Options.Table (J) /= null 1258 and then 1259 Linker_Options.Table (J)'Length 1260 > Run_Path_Opt'Length 1261 and then 1262 Linker_Options.Table (J) 1263 (1 .. Run_Path_Opt'Length) = 1264 Run_Path_Opt 1265 then 1266 -- We have found an already 1267 -- specified run_path_option: 1268 -- we will add to this 1269 -- switch, because only one 1270 -- run_path_option should be 1271 -- specified. 1272 1273 Run_Path_Opt_Index := J; 1274 exit; 1275 end if; 1276 end loop; 1277 1278 -- If there is no run_path_option, we 1279 -- need to add one. 1280 1281 if Run_Path_Opt_Index = 0 then 1282 Linker_Options.Increment_Last; 1283 end if; 1284 1285 if GCC_Index = 0 then 1286 if Run_Path_Opt_Index = 0 then 1287 Linker_Options.Table 1288 (Linker_Options.Last) := 1289 new String' 1290 (Run_Path_Opt 1291 & File_Path 1292 (1 .. File_Path'Length 1293 - File_Name'Length)); 1294 1295 else 1296 Linker_Options.Table 1297 (Run_Path_Opt_Index) := 1298 new String' 1299 (Linker_Options.Table 1300 (Run_Path_Opt_Index).all 1301 & Path_Separator 1302 & File_Path 1303 (1 .. File_Path'Length 1304 - File_Name'Length)); 1305 end if; 1306 1307 else 1308 if Run_Path_Opt_Index = 0 then 1309 Linker_Options.Table 1310 (Linker_Options.Last) := 1311 new String' 1312 (Run_Path_Opt 1313 & File_Path 1314 (1 .. File_Path'Length 1315 - File_Name'Length) 1316 & Path_Separator 1317 & Path (1 .. GCC_Index)); 1318 1319 else 1320 Linker_Options.Table 1321 (Run_Path_Opt_Index) := 1322 new String' 1323 (Linker_Options.Table 1324 (Run_Path_Opt_Index).all 1325 & Path_Separator 1326 & File_Path 1327 (1 .. File_Path'Length 1328 - File_Name'Length) 1329 & Path_Separator 1330 & Path (1 .. GCC_Index)); 1331 end if; 1332 end if; 1333 end if; 1334 end; 1335 end if; 1336 end if; 1337 1338 -- Then we add the appropriate -l switch 1339 1340 Linker_Options.Increment_Last; 1341 Linker_Options.Table (Linker_Options.Last) := 1342 new String'(Next_Line (Nfirst .. Nlast)); 1343 end if; 1344 1345 else 1346 -- If gnatlib library not found, then add it anyway in 1347 -- case some other mechanism may find it. 1348 1349 Linker_Options.Increment_Last; 1350 Linker_Options.Table (Linker_Options.Last) := 1351 new String'(Next_Line (Nfirst .. Nlast)); 1352 end if; 1353 end; 1354 else 1355 Linker_Options.Increment_Last; 1356 Linker_Options.Table (Linker_Options.Last) := 1357 new String'(Next_Line (Nfirst .. Nlast)); 1358 end if; 1359 end if; 1360 1361 Xlinker_Was_Previous := Next_Line (Nfirst .. Nlast) = "-Xlinker"; 1362 1363 Get_Next_Line; 1364 exit when Next_Line (Nfirst .. Nlast) = End_Info; 1365 1366 Next_Line (Nfirst .. Nlast - 8) := Next_Line (Nfirst + 8 .. Nlast); 1367 Nlast := Nlast - 8; 1368 end loop; 1369 end if; 1370 1371 -- If -shared was specified, invoke gcc with -shared-libgcc 1372 1373 if GNAT_Shared then 1374 Linker_Options.Increment_Last; 1375 Linker_Options.Table (Linker_Options.Last) := Shared_Libgcc; 1376 end if; 1377 1378 Status := fclose (Fd); 1379 end Process_Binder_File; 1380 1381 ----------- 1382 -- Usage -- 1383 ----------- 1384 1385 procedure Usage is 1386 begin 1387 Write_Str ("Usage: "); 1388 Write_Str (Base_Command_Name.all); 1389 Write_Str (" switches mainprog.ali [non-Ada-objects] [linker-options]"); 1390 Write_Eol; 1391 Write_Eol; 1392 Write_Line (" mainprog.ali the ALI file of the main program"); 1393 Write_Eol; 1394 Write_Eol; 1395 Display_Usage_Version_And_Help; 1396 Write_Line (" -f Force object file list to be generated"); 1397 Write_Line (" -g Compile binder source file with debug information"); 1398 Write_Line (" -n Do not compile the binder source file"); 1399 Write_Line (" -P Process files for use by CodePeer"); 1400 Write_Line (" -R Do not use a run_path_option"); 1401 Write_Line (" -v Verbose mode"); 1402 Write_Line (" -v -v Very verbose mode"); 1403 Write_Eol; 1404 Write_Line (" -o nam Use 'nam' as the name of the executable"); 1405 Write_Line (" -Bdir Load compiler executables from dir"); 1406 1407 if Is_Supported (Map_File) then 1408 Write_Line (" -Mmap Create map file map"); 1409 Write_Line (" -M Create map file mainprog.map"); 1410 end if; 1411 1412 Write_Line (" --GCC=comp Use 'comp' as the compiler rather than 'gcc'"); 1413 Write_Line (" --LINK=lnk Use 'lnk' as the linker rather than 'gcc'"); 1414 Write_Eol; 1415 Write_Line (" [non-Ada-objects] list of non Ada object files"); 1416 Write_Line (" [linker-options] other options for the linker"); 1417 end Usage; 1418 1419 ------------------ 1420 -- Write_Header -- 1421 ------------------ 1422 1423 procedure Write_Header is 1424 begin 1425 if Verbose_Mode then 1426 Write_Eol; 1427 Display_Version ("GNATLINK", "1995"); 1428 end if; 1429 end Write_Header; 1430 1431 ----------------- 1432 -- Write_Usage -- 1433 ----------------- 1434 1435 procedure Write_Usage is 1436 begin 1437 Write_Header; 1438 Usage; 1439 end Write_Usage; 1440 1441-- Start of processing for Gnatlink 1442 1443begin 1444 -- Add the directory where gnatlink is invoked in front of the path, if 1445 -- gnatlink is invoked with directory information. 1446 1447 declare 1448 Command : constant String := Command_Name; 1449 begin 1450 for Index in reverse Command'Range loop 1451 if Command (Index) = Directory_Separator then 1452 declare 1453 Absolute_Dir : constant String := 1454 Normalize_Pathname 1455 (Command (Command'First .. Index)); 1456 1457 PATH : constant String := 1458 Absolute_Dir & 1459 Path_Separator & 1460 Getenv ("PATH").all; 1461 1462 begin 1463 Setenv ("PATH", PATH); 1464 end; 1465 1466 exit; 1467 end if; 1468 end loop; 1469 end; 1470 1471 Base_Command_Name := new String'(Base_Name (Command_Name)); 1472 Process_Args; 1473 1474 if Argument_Count = 0 1475 or else (Verbose_Mode and then Argument_Count = 1) 1476 then 1477 Write_Usage; 1478 Exit_Program (E_Fatal); 1479 end if; 1480 1481 -- Initialize packages to be used 1482 1483 Csets.Initialize; 1484 Snames.Initialize; 1485 1486 -- We always compile with -c 1487 1488 Binder_Options_From_ALI.Increment_Last; 1489 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1490 new String'("-c"); 1491 1492 if Ali_File_Name = null then 1493 Exit_With_Error ("no ali file given for link"); 1494 end if; 1495 1496 if not Is_Regular_File (Ali_File_Name.all) then 1497 Exit_With_Error (Ali_File_Name.all & " not found"); 1498 end if; 1499 1500 -- Read the ALI file of the main subprogram if the binder generated file 1501 -- needs to be compiled and no --GCC= switch has been specified. Fetch the 1502 -- back end switches from this ALI file and use these switches to compile 1503 -- the binder generated file 1504 1505 if Compile_Bind_File and then Standard_Gcc then 1506 Initialize_ALI; 1507 Name_Len := Ali_File_Name'Length; 1508 Name_Buffer (1 .. Name_Len) := Ali_File_Name.all; 1509 1510 declare 1511 use Types; 1512 F : constant File_Name_Type := Name_Find; 1513 T : Text_Buffer_Ptr; 1514 A : ALI_Id; 1515 1516 begin 1517 -- Load the ALI file 1518 1519 T := Read_Library_Info (F, True); 1520 1521 -- Read it. Note that we ignore errors, since we only want very 1522 -- limited information from the ali file, and likely a slightly 1523 -- wrong version will be just fine, though in normal operation 1524 -- we don't expect this to happen. 1525 1526 A := Scan_ALI 1527 (F, 1528 T, 1529 Ignore_ED => False, 1530 Err => False, 1531 Ignore_Errors => True); 1532 1533 if A /= No_ALI_Id then 1534 for 1535 Index in Units.Table (ALIs.Table (A).First_Unit).First_Arg .. 1536 Units.Table (ALIs.Table (A).First_Unit).Last_Arg 1537 loop 1538 -- Do not compile with the front end switches. However, --RTS 1539 -- is to be dealt with specially because it needs to be passed 1540 -- to compile the file generated by the binder. 1541 1542 declare 1543 Arg : String_Ptr renames Args.Table (Index); 1544 begin 1545 if not Is_Front_End_Switch (Arg.all) then 1546 Binder_Options_From_ALI.Increment_Last; 1547 Binder_Options_From_ALI.Table 1548 (Binder_Options_From_ALI.Last) := String_Access (Arg); 1549 1550 -- GNAT doesn't support GCC's multilib mechanism when it 1551 -- is configured with --disable-libada. This means that, 1552 -- when a multilib switch is used to request a particular 1553 -- compilation mode, the corresponding --RTS switch must 1554 -- also be specified. It is convenient to eliminate the 1555 -- redundancy by keying the compilation mode on a single 1556 -- switch, namely --RTS, and have the compiler reinstate 1557 -- the multilib switch (see gcc-interface/lang-specs.h). 1558 -- This switch must be passed to the driver at link time. 1559 1560 if Arg'Length = 5 1561 and then Arg (Arg'First + 1 .. Arg'First + 4) = "mrtp" 1562 then 1563 Linker_Options.Increment_Last; 1564 Linker_Options.Table 1565 (Linker_Options.Last) := String_Access (Arg); 1566 end if; 1567 1568 elsif Arg'Length > 5 1569 and then Arg (Arg'First + 2 .. Arg'First + 5) = "RTS=" 1570 then 1571 Binder_Options_From_ALI.Increment_Last; 1572 Binder_Options_From_ALI.Table 1573 (Binder_Options_From_ALI.Last) := String_Access (Arg); 1574 1575 -- Set the RTS_*_Path_Name variables, so that 1576 -- the correct directories will be set when 1577 -- Osint.Add_Default_Search_Dirs will be called later. 1578 1579 Opt.RTS_Src_Path_Name := 1580 Get_RTS_Search_Dir 1581 (Arg (Arg'First + 6 .. Arg'Last), Include); 1582 1583 Opt.RTS_Lib_Path_Name := 1584 Get_RTS_Search_Dir 1585 (Arg (Arg'First + 6 .. Arg'Last), Objects); 1586 end if; 1587 end; 1588 end loop; 1589 end if; 1590 end; 1591 end if; 1592 1593 -- Get target parameters 1594 1595 Osint.Add_Default_Search_Dirs; 1596 Targparm.Get_Target_Parameters; 1597 1598 -- Compile the bind file with the following switches: 1599 1600 -- -gnatA stops reading gnat.adc, since we don't know what 1601 -- pragmas would work, and we do not need it anyway. 1602 1603 -- -gnatWb allows brackets coding for wide characters 1604 1605 -- -gnatiw allows wide characters in identifiers. This is needed 1606 -- because bindgen uses brackets encoding for all upper 1607 -- half and wide characters in identifier names. 1608 1609 -- In addition, in CodePeer mode compile with -x adascil -gnatcC 1610 1611 Binder_Options_From_ALI.Increment_Last; 1612 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1613 new String'("-gnatA"); 1614 Binder_Options_From_ALI.Increment_Last; 1615 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1616 new String'("-gnatWb"); 1617 Binder_Options_From_ALI.Increment_Last; 1618 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1619 new String'("-gnatiw"); 1620 1621 if Opt.CodePeer_Mode then 1622 Binder_Options_From_ALI.Increment_Last; 1623 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1624 new String'("-x"); 1625 Binder_Options_From_ALI.Increment_Last; 1626 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1627 new String'("adascil"); 1628 Binder_Options_From_ALI.Increment_Last; 1629 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1630 new String'("-gnatcC"); 1631 end if; 1632 1633 -- Locate all the necessary programs and verify required files are present 1634 1635 Gcc_Path := System.OS_Lib.Locate_Exec_On_Path (Gcc.all); 1636 1637 if Gcc_Path = null then 1638 Exit_With_Error ("Couldn't locate " & Gcc.all); 1639 end if; 1640 1641 if Linker_Path = null then 1642 Linker_Path := Gcc_Path; 1643 end if; 1644 1645 Write_Header; 1646 1647 Target_Debuggable_Suffix := Get_Target_Debuggable_Suffix; 1648 1649 -- If no output name specified, then use the base name of .ali file name 1650 1651 if Output_File_Name = null then 1652 Output_File_Name := 1653 new String'(Base_Name (Ali_File_Name.all) 1654 & Target_Debuggable_Suffix.all); 1655 end if; 1656 1657 Linker_Options.Increment_Last; 1658 Linker_Options.Table (Linker_Options.Last) := new String'("-o"); 1659 1660 Linker_Options.Increment_Last; 1661 Linker_Options.Table (Linker_Options.Last) := 1662 new String'(Output_File_Name.all); 1663 1664 Check_Existing_Executable (Output_File_Name.all); 1665 1666 -- Warn if main program is called "test", as that may be a built-in command 1667 -- on Unix. On non-Unix systems executables have a suffix, so the warning 1668 -- will not appear. However, do not warn in the case of a cross compiler. 1669 1670 -- Assume this is a cross tool if the executable name is not gnatlink. 1671 -- Note that the executable name is also gnatlink on windows, but in that 1672 -- case the output file name will be test.exe rather than test. 1673 1674 if Base_Command_Name.all = "gnatlink" 1675 and then Output_File_Name.all = "test" 1676 then 1677 Error_Msg ("warning: executable name """ & Output_File_Name.all 1678 & """ may conflict with shell command"); 1679 end if; 1680 1681 -- Special warnings for worrisome file names on windows 1682 1683 -- Recent versions of Windows by default cause privilege escalation if an 1684 -- executable file name contains substrings "install", "setup", "update" 1685 -- or "patch". A console application will typically fail to load as a 1686 -- result, so we should warn the user. 1687 1688 Bad_File_Names_On_Windows : declare 1689 FN : String := Output_File_Name.all; 1690 1691 procedure Check_File_Name (S : String); 1692 -- Warn if file name has the substring S 1693 1694 procedure Check_File_Name (S : String) is 1695 begin 1696 for J in 1 .. FN'Length - (S'Length - 1) loop 1697 if FN (J .. J + (S'Length - 1)) = S then 1698 Error_Msg 1699 ("warning: executable file name """ & Output_File_Name.all 1700 & """ contains substring """ & S & '"'); 1701 Error_Msg 1702 ("admin privileges may be required to run this file"); 1703 end if; 1704 end loop; 1705 end Check_File_Name; 1706 1707 -- Start of processing for Bad_File_Names_On_Windows 1708 1709 begin 1710 for J in FN'Range loop 1711 FN (J) := Csets.Fold_Lower (FN (J)); 1712 end loop; 1713 1714 -- For now we detect Windows by its executable suffix of .exe 1715 1716 if Target_Debuggable_Suffix.all = ".exe" then 1717 Check_File_Name ("install"); 1718 Check_File_Name ("setup"); 1719 Check_File_Name ("update"); 1720 Check_File_Name ("patch"); 1721 end if; 1722 end Bad_File_Names_On_Windows; 1723 1724 -- If -M switch was specified, add the switches to create the map file 1725 1726 if Create_Map_File then 1727 declare 1728 Map_Name : constant String := Base_Name (Ali_File_Name.all) & ".map"; 1729 Switches : String_List_Access; 1730 1731 begin 1732 Convert (Map_File, Map_Name, Switches); 1733 1734 if Switches /= null then 1735 for J in Switches'Range loop 1736 Linker_Options.Increment_Last; 1737 Linker_Options.Table (Linker_Options.Last) := Switches (J); 1738 end loop; 1739 end if; 1740 end; 1741 end if; 1742 1743 -- Perform consistency checks 1744 1745 -- Transform the .ali file name into the binder output file name 1746 1747 Make_Binder_File_Names : declare 1748 Fname : constant String := Base_Name (Ali_File_Name.all); 1749 Fname_Len : Integer := Fname'Length; 1750 1751 function Get_Maximum_File_Name_Length return Integer; 1752 pragma Import (C, Get_Maximum_File_Name_Length, 1753 "__gnat_get_maximum_file_name_length"); 1754 1755 Maximum_File_Name_Length : constant Integer := 1756 Get_Maximum_File_Name_Length; 1757 1758 Bind_File_Prefix : Types.String_Ptr; 1759 -- Contains prefix used for bind files 1760 1761 begin 1762 -- Set prefix 1763 1764 Bind_File_Prefix := new String'("b~"); 1765 1766 -- If the length of the binder file becomes too long due to 1767 -- the addition of the "b?" prefix, then truncate it. 1768 1769 if Maximum_File_Name_Length > 0 then 1770 while Fname_Len > 1771 Maximum_File_Name_Length - Bind_File_Prefix.all'Length 1772 loop 1773 Fname_Len := Fname_Len - 1; 1774 end loop; 1775 end if; 1776 1777 declare 1778 Fnam : constant String := 1779 Bind_File_Prefix.all & 1780 Fname (Fname'First .. Fname'First + Fname_Len - 1); 1781 1782 begin 1783 Binder_Spec_Src_File := new String'(Fnam & ".ads"); 1784 Binder_Body_Src_File := new String'(Fnam & ".adb"); 1785 Binder_Ali_File := new String'(Fnam & ".ali"); 1786 1787 Binder_Obj_File := new String'(Fnam & Get_Target_Object_Suffix.all); 1788 end; 1789 1790 if Fname_Len /= Fname'Length then 1791 Binder_Options.Increment_Last; 1792 Binder_Options.Table (Binder_Options.Last) := new String'("-o"); 1793 Binder_Options.Increment_Last; 1794 Binder_Options.Table (Binder_Options.Last) := Binder_Obj_File; 1795 end if; 1796 end Make_Binder_File_Names; 1797 1798 Process_Binder_File (Binder_Body_Src_File.all & ASCII.NUL); 1799 1800 -- Compile the binder file. This is fast, so we always do it, unless 1801 -- specifically told not to by the -n switch 1802 1803 if Compile_Bind_File then 1804 Bind_Step : declare 1805 Success : Boolean; 1806 1807 Args : Argument_List 1808 (1 .. Binder_Options_From_ALI.Last + Binder_Options.Last + 1); 1809 1810 begin 1811 for J in 1 .. Binder_Options_From_ALI.Last loop 1812 Args (J) := Binder_Options_From_ALI.Table (J); 1813 end loop; 1814 1815 for J in 1 .. Binder_Options.Last loop 1816 Args (Binder_Options_From_ALI.Last + J) := 1817 Binder_Options.Table (J); 1818 end loop; 1819 1820 -- Use the full path of the binder generated source, so that it is 1821 -- guaranteed that the debugger will find this source, even with 1822 -- STABS. 1823 1824 Args (Args'Last) := 1825 new String'(Normalize_Pathname (Binder_Body_Src_File.all)); 1826 1827 if Verbose_Mode then 1828 Write_Str (Base_Name (Gcc_Path.all)); 1829 1830 for J in Args'Range loop 1831 Write_Str (" "); 1832 Write_Str (Args (J).all); 1833 end loop; 1834 1835 Write_Eol; 1836 end if; 1837 1838 System.OS_Lib.Spawn (Gcc_Path.all, Args, Success); 1839 1840 if not Success then 1841 Exit_Program (E_Fatal); 1842 end if; 1843 end Bind_Step; 1844 end if; 1845 1846 -- In CodePeer mode, there's nothing left to do after the binder file has 1847 -- been compiled. 1848 1849 if Opt.CodePeer_Mode then 1850 if Tname_FD /= Invalid_FD then 1851 Delete (Tname); 1852 end if; 1853 1854 return; 1855 end if; 1856 1857 -- Now, actually link the program 1858 1859 Link_Step : declare 1860 Num_Args : Natural := 1861 (Linker_Options.Last - Linker_Options.First + 1) + 1862 (Gcc_Linker_Options.Last - Gcc_Linker_Options.First + 1) + 1863 (Linker_Objects.Last - Linker_Objects.First + 1); 1864 Stack_Op : Boolean := False; 1865 1866 begin 1867 -- Remove duplicate stack size setting from the Linker_Options table. 1868 -- The stack setting option "-Xlinker --stack=R,C" can be found 1869 -- in one line when set by a pragma Linker_Options or in two lines 1870 -- ("-Xlinker" then "--stack=R,C") when set on the command line. We 1871 -- also check for the "-Wl,--stack=R" style option. 1872 1873 -- We must remove the second stack setting option instance because 1874 -- the one on the command line will always be the first one. And any 1875 -- subsequent stack setting option will overwrite the previous one. 1876 -- This is done especially for GNAT/NT where we set the stack size 1877 -- for tasking programs by a pragma in the NT specific tasking 1878 -- package System.Task_Primitives.Operations. 1879 1880 -- Note: This is not a FOR loop that runs from Linker_Options.First 1881 -- to Linker_Options.Last, since operations within the loop can 1882 -- modify the length of the table. 1883 1884 Clean_Link_Option_Set : declare 1885 J : Natural; 1886 Shared_Libgcc_Seen : Boolean := False; 1887 1888 begin 1889 J := Linker_Options.First; 1890 while J <= Linker_Options.Last loop 1891 if Linker_Options.Table (J).all = "-Xlinker" 1892 and then J < Linker_Options.Last 1893 and then Linker_Options.Table (J + 1)'Length > 8 1894 and then Linker_Options.Table (J + 1) (1 .. 8) = "--stack=" 1895 then 1896 if Stack_Op then 1897 Linker_Options.Table (J .. Linker_Options.Last - 2) := 1898 Linker_Options.Table (J + 2 .. Linker_Options.Last); 1899 Linker_Options.Decrement_Last; 1900 Linker_Options.Decrement_Last; 1901 Num_Args := Num_Args - 2; 1902 1903 else 1904 Stack_Op := True; 1905 end if; 1906 end if; 1907 1908 -- Remove duplicate -shared-libgcc switch 1909 1910 if Linker_Options.Table (J).all = Shared_Libgcc_String then 1911 if Shared_Libgcc_Seen then 1912 Linker_Options.Table (J .. Linker_Options.Last - 1) := 1913 Linker_Options.Table (J + 1 .. Linker_Options.Last); 1914 Linker_Options.Decrement_Last; 1915 Num_Args := Num_Args - 1; 1916 1917 else 1918 Shared_Libgcc_Seen := True; 1919 end if; 1920 end if; 1921 1922 -- Here we just check for a canonical form that matches the 1923 -- pragma Linker_Options set in the NT runtime. 1924 1925 if (Linker_Options.Table (J)'Length > 17 1926 and then Linker_Options.Table (J) (1 .. 17) = 1927 "-Xlinker --stack=") 1928 or else 1929 (Linker_Options.Table (J)'Length > 12 1930 and then Linker_Options.Table (J) (1 .. 12) = 1931 "-Wl,--stack=") 1932 then 1933 if Stack_Op then 1934 Linker_Options.Table (J .. Linker_Options.Last - 1) := 1935 Linker_Options.Table (J + 1 .. Linker_Options.Last); 1936 Linker_Options.Decrement_Last; 1937 Num_Args := Num_Args - 1; 1938 1939 else 1940 Stack_Op := True; 1941 end if; 1942 end if; 1943 1944 J := J + 1; 1945 end loop; 1946 1947 if Linker_Path = Gcc_Path then 1948 1949 -- For systems where the default is to link statically with 1950 -- libgcc, if gcc is not called with -shared-libgcc, call it 1951 -- with -static-libgcc, as there are some platforms where one 1952 -- of these two switches is compulsory to link. 1953 1954 if Shared_Libgcc_Default = 'T' 1955 and then not Shared_Libgcc_Seen 1956 then 1957 Linker_Options.Increment_Last; 1958 Linker_Options.Table (Linker_Options.Last) := Static_Libgcc; 1959 Num_Args := Num_Args + 1; 1960 end if; 1961 end if; 1962 end Clean_Link_Option_Set; 1963 1964 -- Prepare arguments for call to linker 1965 1966 Call_Linker : declare 1967 Success : Boolean; 1968 Args : Argument_List (1 .. Num_Args + 1); 1969 Index : Integer := Args'First; 1970 1971 begin 1972 Args (Index) := Binder_Obj_File; 1973 1974 -- Add the object files and any -largs libraries 1975 1976 for J in Linker_Objects.First .. Linker_Objects.Last loop 1977 Index := Index + 1; 1978 Args (Index) := Linker_Objects.Table (J); 1979 end loop; 1980 1981 -- Add the linker options from the binder file 1982 1983 for J in Linker_Options.First .. Linker_Options.Last loop 1984 Index := Index + 1; 1985 Args (Index) := Linker_Options.Table (J); 1986 end loop; 1987 1988 -- Finally add the libraries from the --GCC= switch 1989 1990 for J in Gcc_Linker_Options.First .. Gcc_Linker_Options.Last loop 1991 Index := Index + 1; 1992 Args (Index) := Gcc_Linker_Options.Table (J); 1993 end loop; 1994 1995 if Verbose_Mode then 1996 Write_Str (Linker_Path.all); 1997 1998 for J in Args'Range loop 1999 Write_Str (" "); 2000 Write_Str (Args (J).all); 2001 end loop; 2002 2003 Write_Eol; 2004 2005 -- If we are on very verbose mode (-v -v) and a response file 2006 -- is used we display its content. 2007 2008 if Very_Verbose_Mode and then Tname_FD /= Invalid_FD then 2009 Write_Eol; 2010 Write_Str ("Response file (" & 2011 Tname (Tname'First .. Tname'Last - 1) & 2012 ") content : "); 2013 Write_Eol; 2014 2015 for J in 2016 Response_File_Objects.First .. Response_File_Objects.Last 2017 loop 2018 Write_Str (Response_File_Objects.Table (J).all); 2019 Write_Eol; 2020 end loop; 2021 2022 Write_Eol; 2023 end if; 2024 end if; 2025 2026 System.OS_Lib.Spawn (Linker_Path.all, Args, Success); 2027 2028 -- Delete the temporary file used in conjunction with linking if one 2029 -- was created. See Process_Bind_File for details. 2030 2031 if Tname_FD /= Invalid_FD then 2032 Delete (Tname); 2033 end if; 2034 2035 if not Success then 2036 Error_Msg ("error when calling " & Linker_Path.all); 2037 Exit_Program (E_Fatal); 2038 end if; 2039 end Call_Linker; 2040 end Link_Step; 2041 2042 -- Only keep the binder output file and it's associated object 2043 -- file if compiling with the -g option. These files are only 2044 -- useful if debugging. 2045 2046 if not Debug_Flag_Present then 2047 Delete (Binder_Ali_File.all & ASCII.NUL); 2048 Delete (Binder_Spec_Src_File.all & ASCII.NUL); 2049 Delete (Binder_Body_Src_File.all & ASCII.NUL); 2050 Delete (Binder_Obj_File.all & ASCII.NUL); 2051 end if; 2052 2053 Exit_Program (E_Success); 2054 2055exception 2056 when X : others => 2057 Write_Line (Exception_Information (X)); 2058 Exit_With_Error ("INTERNAL ERROR. Please report"); 2059end Gnatlink; 2060