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) 1996-2018, 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 ("gcc", "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 517 -- and 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 Next_Line (Nlast - Library_Version'Length + 1 .. Nlast) = 1106 Library_Version 1107 then 1108 -- Set Last to point to last character before the 1109 -- library version. 1110 1111 Last := Nlast - Library_Version'Length - 1; 1112 else 1113 Last := Nlast; 1114 end if; 1115 1116 -- Given a Gnat standard library, search the library path to 1117 -- find the library location. 1118 1119 -- Shouldn't we abstract a proc here, we are getting awfully 1120 -- heavily nested ??? 1121 1122 declare 1123 File_Path : String_Access; 1124 1125 Object_Lib_Extension : constant String := 1126 Value (Object_Library_Ext_Ptr); 1127 1128 File_Name : constant String := "lib" & 1129 Next_Line (Nfirst + 2 .. Last) & Object_Lib_Extension; 1130 1131 Run_Path_Opt : constant String := 1132 Value (Run_Path_Option_Ptr); 1133 1134 GCC_Index : Natural; 1135 Run_Path_Opt_Index : Natural := 0; 1136 1137 begin 1138 File_Path := 1139 Locate_Regular_File (File_Name, 1140 String (Libpath.Table (1 .. Libpath.Last))); 1141 1142 if File_Path /= null then 1143 if GNAT_Static then 1144 1145 -- If static gnatlib found, explicitly specify to 1146 -- overcome possible linker default usage of shared 1147 -- version. 1148 1149 Linker_Options.Increment_Last; 1150 1151 Linker_Options.Table (Linker_Options.Last) := 1152 new String'(File_Path.all); 1153 1154 elsif GNAT_Shared then 1155 if Opt.Run_Path_Option then 1156 1157 -- If shared gnatlib desired, add appropriate 1158 -- system specific switch so that it can be 1159 -- located at runtime. 1160 1161 if Run_Path_Opt'Length /= 0 then 1162 1163 -- Output the system specific linker command 1164 -- that allows the image activator to find 1165 -- the shared library at runtime. Also add 1166 -- path to find libgcc_s.so, if relevant. 1167 1168 declare 1169 Path : String (1 .. File_Path'Length + 15); 1170 1171 Path_Last : constant Natural := 1172 File_Path'Length; 1173 1174 begin 1175 Path (1 .. File_Path'Length) := 1176 File_Path.all; 1177 1178 -- To find the location of the shared version 1179 -- of libgcc, we look for "gcc-lib" in the 1180 -- path of the library. However, this 1181 -- subdirectory is no longer present in 1182 -- recent versions of GCC. So, we look for 1183 -- the last subdirectory "lib" in the path. 1184 1185 GCC_Index := 1186 Index (Path (1 .. Path_Last), "gcc-lib"); 1187 1188 if GCC_Index /= 0 then 1189 1190 -- The shared version of libgcc is 1191 -- located in the parent directory. 1192 1193 GCC_Index := GCC_Index - 1; 1194 1195 else 1196 GCC_Index := 1197 Index 1198 (Path (1 .. Path_Last), 1199 "/lib/"); 1200 1201 if GCC_Index = 0 then 1202 GCC_Index := 1203 Index (Path (1 .. Path_Last), 1204 Directory_Separator & "lib" 1205 & Directory_Separator); 1206 end if; 1207 1208 -- If we have found a "lib" subdir in 1209 -- the path to libgnat, the possible 1210 -- shared libgcc of interest by default 1211 -- is in libgcc_subdir at the same 1212 -- level. 1213 1214 if GCC_Index /= 0 then 1215 declare 1216 Subdir : constant String := 1217 Value (Libgcc_Subdir_Ptr); 1218 begin 1219 Path 1220 (GCC_Index + 1 .. 1221 GCC_Index + Subdir'Length) := 1222 Subdir; 1223 GCC_Index := 1224 GCC_Index + Subdir'Length; 1225 end; 1226 end if; 1227 end if; 1228 1229 -- Look for an eventual run_path_option in 1230 -- the linker switches. 1231 1232 if Separate_Run_Path_Options then 1233 Linker_Options.Increment_Last; 1234 Linker_Options.Table 1235 (Linker_Options.Last) := 1236 new String' 1237 (Run_Path_Opt 1238 & File_Path 1239 (1 .. File_Path'Length 1240 - File_Name'Length)); 1241 1242 if GCC_Index /= 0 then 1243 Linker_Options.Increment_Last; 1244 Linker_Options.Table 1245 (Linker_Options.Last) := 1246 new String' 1247 (Run_Path_Opt 1248 & Path (1 .. GCC_Index)); 1249 end if; 1250 1251 else 1252 for J in reverse 1253 1 .. Linker_Options.Last 1254 loop 1255 if Linker_Options.Table (J) /= null 1256 and then 1257 Linker_Options.Table (J)'Length 1258 > Run_Path_Opt'Length 1259 and then 1260 Linker_Options.Table (J) 1261 (1 .. Run_Path_Opt'Length) = 1262 Run_Path_Opt 1263 then 1264 -- We have found an already 1265 -- specified run_path_option: 1266 -- we will add to this 1267 -- switch, because only one 1268 -- run_path_option should be 1269 -- specified. 1270 1271 Run_Path_Opt_Index := J; 1272 exit; 1273 end if; 1274 end loop; 1275 1276 -- If there is no run_path_option, we 1277 -- need to add one. 1278 1279 if Run_Path_Opt_Index = 0 then 1280 Linker_Options.Increment_Last; 1281 end if; 1282 1283 if GCC_Index = 0 then 1284 if Run_Path_Opt_Index = 0 then 1285 Linker_Options.Table 1286 (Linker_Options.Last) := 1287 new String' 1288 (Run_Path_Opt 1289 & File_Path 1290 (1 .. File_Path'Length 1291 - File_Name'Length)); 1292 1293 else 1294 Linker_Options.Table 1295 (Run_Path_Opt_Index) := 1296 new String' 1297 (Linker_Options.Table 1298 (Run_Path_Opt_Index).all 1299 & Path_Separator 1300 & File_Path 1301 (1 .. File_Path'Length 1302 - File_Name'Length)); 1303 end if; 1304 1305 else 1306 if Run_Path_Opt_Index = 0 then 1307 Linker_Options.Table 1308 (Linker_Options.Last) := 1309 new String' 1310 (Run_Path_Opt 1311 & File_Path 1312 (1 .. File_Path'Length 1313 - File_Name'Length) 1314 & Path_Separator 1315 & Path (1 .. GCC_Index)); 1316 1317 else 1318 Linker_Options.Table 1319 (Run_Path_Opt_Index) := 1320 new String' 1321 (Linker_Options.Table 1322 (Run_Path_Opt_Index).all 1323 & Path_Separator 1324 & File_Path 1325 (1 .. File_Path'Length 1326 - File_Name'Length) 1327 & Path_Separator 1328 & Path (1 .. GCC_Index)); 1329 end if; 1330 end if; 1331 end if; 1332 end; 1333 end if; 1334 end if; 1335 1336 -- Then we add the appropriate -l switch 1337 1338 Linker_Options.Increment_Last; 1339 Linker_Options.Table (Linker_Options.Last) := 1340 new String'(Next_Line (Nfirst .. Nlast)); 1341 end if; 1342 1343 else 1344 -- If gnatlib library not found, then add it anyway in 1345 -- case some other mechanism may find it. 1346 1347 Linker_Options.Increment_Last; 1348 Linker_Options.Table (Linker_Options.Last) := 1349 new String'(Next_Line (Nfirst .. Nlast)); 1350 end if; 1351 end; 1352 else 1353 Linker_Options.Increment_Last; 1354 Linker_Options.Table (Linker_Options.Last) := 1355 new String'(Next_Line (Nfirst .. Nlast)); 1356 end if; 1357 end if; 1358 1359 Xlinker_Was_Previous := Next_Line (Nfirst .. Nlast) = "-Xlinker"; 1360 1361 Get_Next_Line; 1362 exit when Next_Line (Nfirst .. Nlast) = End_Info; 1363 1364 Next_Line (Nfirst .. Nlast - 8) := Next_Line (Nfirst + 8 .. Nlast); 1365 Nlast := Nlast - 8; 1366 end loop; 1367 end if; 1368 1369 -- If -shared was specified, invoke gcc with -shared-libgcc 1370 1371 if GNAT_Shared then 1372 Linker_Options.Increment_Last; 1373 Linker_Options.Table (Linker_Options.Last) := Shared_Libgcc; 1374 end if; 1375 1376 Status := fclose (Fd); 1377 end Process_Binder_File; 1378 1379 ----------- 1380 -- Usage -- 1381 ----------- 1382 1383 procedure Usage is 1384 begin 1385 Write_Str ("Usage: "); 1386 Write_Str (Base_Command_Name.all); 1387 Write_Str (" switches mainprog.ali [non-Ada-objects] [linker-options]"); 1388 Write_Eol; 1389 Write_Eol; 1390 Write_Line (" mainprog.ali the ALI file of the main program"); 1391 Write_Eol; 1392 Write_Eol; 1393 Display_Usage_Version_And_Help; 1394 Write_Line (" -f Force object file list to be generated"); 1395 Write_Line (" -g Compile binder source file with debug information"); 1396 Write_Line (" -n Do not compile the binder source file"); 1397 Write_Line (" -P Process files for use by CodePeer"); 1398 Write_Line (" -R Do not use a run_path_option"); 1399 Write_Line (" -v Verbose mode"); 1400 Write_Line (" -v -v Very verbose mode"); 1401 Write_Eol; 1402 Write_Line (" -o nam Use 'nam' as the name of the executable"); 1403 Write_Line (" -Bdir Load compiler executables from dir"); 1404 1405 if Is_Supported (Map_File) then 1406 Write_Line (" -Mmap Create map file map"); 1407 Write_Line (" -M Create map file mainprog.map"); 1408 end if; 1409 1410 Write_Line (" --GCC=comp Use 'comp' as the compiler rather than 'gcc'"); 1411 Write_Line (" --LINK=lnk Use 'lnk' as the linker rather than 'gcc'"); 1412 Write_Eol; 1413 Write_Line (" [non-Ada-objects] list of non Ada object files"); 1414 Write_Line (" [linker-options] other options for the linker"); 1415 end Usage; 1416 1417 ------------------ 1418 -- Write_Header -- 1419 ------------------ 1420 1421 procedure Write_Header is 1422 begin 1423 if Verbose_Mode then 1424 Write_Eol; 1425 Display_Version ("GNATLINK", "1995"); 1426 end if; 1427 end Write_Header; 1428 1429 ----------------- 1430 -- Write_Usage -- 1431 ----------------- 1432 1433 procedure Write_Usage is 1434 begin 1435 Write_Header; 1436 Usage; 1437 end Write_Usage; 1438 1439-- Start of processing for Gnatlink 1440 1441begin 1442 -- Add the directory where gnatlink is invoked in front of the path, if 1443 -- gnatlink is invoked with directory information. 1444 1445 declare 1446 Command : constant String := Command_Name; 1447 begin 1448 for Index in reverse Command'Range loop 1449 if Command (Index) = Directory_Separator then 1450 declare 1451 Absolute_Dir : constant String := 1452 Normalize_Pathname 1453 (Command (Command'First .. Index)); 1454 1455 PATH : constant String := 1456 Absolute_Dir & 1457 Path_Separator & 1458 Getenv ("PATH").all; 1459 1460 begin 1461 Setenv ("PATH", PATH); 1462 end; 1463 1464 exit; 1465 end if; 1466 end loop; 1467 end; 1468 1469 Base_Command_Name := new String'(Base_Name (Command_Name)); 1470 Process_Args; 1471 1472 if Argument_Count = 0 1473 or else (Verbose_Mode and then Argument_Count = 1) 1474 then 1475 Write_Usage; 1476 Exit_Program (E_Fatal); 1477 end if; 1478 1479 -- Initialize packages to be used 1480 1481 Csets.Initialize; 1482 Snames.Initialize; 1483 1484 -- We always compile with -c 1485 1486 Binder_Options_From_ALI.Increment_Last; 1487 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1488 new String'("-c"); 1489 1490 if Ali_File_Name = null then 1491 Exit_With_Error ("no ali file given for link"); 1492 end if; 1493 1494 if not Is_Regular_File (Ali_File_Name.all) then 1495 Exit_With_Error (Ali_File_Name.all & " not found"); 1496 end if; 1497 1498 -- Read the ALI file of the main subprogram if the binder generated file 1499 -- needs to be compiled and no --GCC= switch has been specified. Fetch the 1500 -- back end switches from this ALI file and use these switches to compile 1501 -- the binder generated file 1502 1503 if Compile_Bind_File and then Standard_Gcc then 1504 Initialize_ALI; 1505 Name_Len := Ali_File_Name'Length; 1506 Name_Buffer (1 .. Name_Len) := Ali_File_Name.all; 1507 1508 declare 1509 use Types; 1510 F : constant File_Name_Type := Name_Find; 1511 T : Text_Buffer_Ptr; 1512 A : ALI_Id; 1513 1514 begin 1515 -- Load the ALI file 1516 1517 T := Read_Library_Info (F, True); 1518 1519 -- Read it. Note that we ignore errors, since we only want very 1520 -- limited information from the ali file, and likely a slightly 1521 -- wrong version will be just fine, though in normal operation 1522 -- we don't expect this to happen. 1523 1524 A := Scan_ALI 1525 (F, 1526 T, 1527 Ignore_ED => False, 1528 Err => False, 1529 Ignore_Errors => True); 1530 1531 if A /= No_ALI_Id then 1532 for 1533 Index in Units.Table (ALIs.Table (A).First_Unit).First_Arg .. 1534 Units.Table (ALIs.Table (A).First_Unit).Last_Arg 1535 loop 1536 -- Do not compile with the front end switches. However, --RTS 1537 -- is to be dealt with specially because it needs to be passed 1538 -- to compile the file generated by the binder. 1539 1540 declare 1541 Arg : String_Ptr renames Args.Table (Index); 1542 begin 1543 if not Is_Front_End_Switch (Arg.all) then 1544 Binder_Options_From_ALI.Increment_Last; 1545 Binder_Options_From_ALI.Table 1546 (Binder_Options_From_ALI.Last) := String_Access (Arg); 1547 1548 -- GNAT doesn't support GCC's multilib mechanism when it 1549 -- is configured with --disable-libada. This means that, 1550 -- when a multilib switch is used to request a particular 1551 -- compilation mode, the corresponding --RTS switch must 1552 -- also be specified. It is convenient to eliminate the 1553 -- redundancy by keying the compilation mode on a single 1554 -- switch, namely --RTS, and have the compiler reinstate 1555 -- the multilib switch (see gcc-interface/lang-specs.h). 1556 -- This switch must be passed to the driver at link time. 1557 1558 if Arg'Length = 5 1559 and then Arg (Arg'First + 1 .. Arg'First + 4) = "mrtp" 1560 then 1561 Linker_Options.Increment_Last; 1562 Linker_Options.Table 1563 (Linker_Options.Last) := String_Access (Arg); 1564 end if; 1565 1566 elsif Arg'Length > 5 1567 and then Arg (Arg'First + 2 .. Arg'First + 5) = "RTS=" 1568 then 1569 Binder_Options_From_ALI.Increment_Last; 1570 Binder_Options_From_ALI.Table 1571 (Binder_Options_From_ALI.Last) := String_Access (Arg); 1572 1573 -- Set the RTS_*_Path_Name variables, so that 1574 -- the correct directories will be set when 1575 -- Osint.Add_Default_Search_Dirs will be called later. 1576 1577 Opt.RTS_Src_Path_Name := 1578 Get_RTS_Search_Dir 1579 (Arg (Arg'First + 6 .. Arg'Last), Include); 1580 1581 Opt.RTS_Lib_Path_Name := 1582 Get_RTS_Search_Dir 1583 (Arg (Arg'First + 6 .. Arg'Last), Objects); 1584 end if; 1585 end; 1586 end loop; 1587 end if; 1588 end; 1589 end if; 1590 1591 -- Get target parameters 1592 1593 Osint.Add_Default_Search_Dirs; 1594 Targparm.Get_Target_Parameters; 1595 1596 -- Compile the bind file with the following switches: 1597 1598 -- -gnatA stops reading gnat.adc, since we don't know what 1599 -- pragmas would work, and we do not need it anyway. 1600 1601 -- -gnatWb allows brackets coding for wide characters 1602 1603 -- -gnatiw allows wide characters in identifiers. This is needed 1604 -- because bindgen uses brackets encoding for all upper 1605 -- half and wide characters in identifier names. 1606 1607 -- In addition, in CodePeer mode compile with -x adascil -gnatcC 1608 1609 Binder_Options_From_ALI.Increment_Last; 1610 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1611 new String'("-gnatA"); 1612 Binder_Options_From_ALI.Increment_Last; 1613 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1614 new String'("-gnatWb"); 1615 Binder_Options_From_ALI.Increment_Last; 1616 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1617 new String'("-gnatiw"); 1618 1619 if Opt.CodePeer_Mode then 1620 Binder_Options_From_ALI.Increment_Last; 1621 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1622 new String'("-x"); 1623 Binder_Options_From_ALI.Increment_Last; 1624 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1625 new String'("adascil"); 1626 Binder_Options_From_ALI.Increment_Last; 1627 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) := 1628 new String'("-gnatcC"); 1629 end if; 1630 1631 -- Locate all the necessary programs and verify required files are present 1632 1633 Gcc_Path := System.OS_Lib.Locate_Exec_On_Path (Gcc.all); 1634 1635 if Gcc_Path = null then 1636 Exit_With_Error ("Couldn't locate " & Gcc.all); 1637 end if; 1638 1639 if Linker_Path = null then 1640 Linker_Path := Gcc_Path; 1641 end if; 1642 1643 Write_Header; 1644 1645 Target_Debuggable_Suffix := Get_Target_Debuggable_Suffix; 1646 1647 -- If no output name specified, then use the base name of .ali file name 1648 1649 if Output_File_Name = null then 1650 Output_File_Name := 1651 new String'(Base_Name (Ali_File_Name.all) 1652 & Target_Debuggable_Suffix.all); 1653 end if; 1654 1655 Linker_Options.Increment_Last; 1656 Linker_Options.Table (Linker_Options.Last) := new String'("-o"); 1657 1658 Linker_Options.Increment_Last; 1659 Linker_Options.Table (Linker_Options.Last) := 1660 new String'(Output_File_Name.all); 1661 1662 Check_Existing_Executable (Output_File_Name.all); 1663 1664 -- Warn if main program is called "test", as that may be a built-in command 1665 -- on Unix. On non-Unix systems executables have a suffix, so the warning 1666 -- will not appear. However, do not warn in the case of a cross compiler. 1667 1668 -- Assume this is a cross tool if the executable name is not gnatlink. 1669 -- Note that the executable name is also gnatlink on windows, but in that 1670 -- case the output file name will be test.exe rather than test. 1671 1672 if Base_Command_Name.all = "gnatlink" 1673 and then Output_File_Name.all = "test" 1674 then 1675 Error_Msg ("warning: executable name """ & Output_File_Name.all 1676 & """ may conflict with shell command"); 1677 end if; 1678 1679 -- Special warnings for worrisome file names on windows 1680 1681 -- Recent versions of Windows by default cause privilege escalation if an 1682 -- executable file name contains substrings "install", "setup", "update" 1683 -- or "patch". A console application will typically fail to load as a 1684 -- result, so we should warn the user. 1685 1686 Bad_File_Names_On_Windows : declare 1687 FN : String := Output_File_Name.all; 1688 1689 procedure Check_File_Name (S : String); 1690 -- Warn if file name has the substring S 1691 1692 procedure Check_File_Name (S : String) is 1693 begin 1694 for J in 1 .. FN'Length - (S'Length - 1) loop 1695 if FN (J .. J + (S'Length - 1)) = S then 1696 Error_Msg 1697 ("warning: executable file name """ & Output_File_Name.all 1698 & """ contains substring """ & S & '"'); 1699 Error_Msg 1700 ("admin privileges may be required to run this file"); 1701 end if; 1702 end loop; 1703 end Check_File_Name; 1704 1705 -- Start of processing for Bad_File_Names_On_Windows 1706 1707 begin 1708 for J in FN'Range loop 1709 FN (J) := Csets.Fold_Lower (FN (J)); 1710 end loop; 1711 1712 -- For now we detect Windows by its executable suffix of .exe 1713 1714 if Target_Debuggable_Suffix.all = ".exe" then 1715 Check_File_Name ("install"); 1716 Check_File_Name ("setup"); 1717 Check_File_Name ("update"); 1718 Check_File_Name ("patch"); 1719 end if; 1720 end Bad_File_Names_On_Windows; 1721 1722 -- If -M switch was specified, add the switches to create the map file 1723 1724 if Create_Map_File then 1725 declare 1726 Map_Name : constant String := Base_Name (Ali_File_Name.all) & ".map"; 1727 Switches : String_List_Access; 1728 1729 begin 1730 Convert (Map_File, Map_Name, Switches); 1731 1732 if Switches /= null then 1733 for J in Switches'Range loop 1734 Linker_Options.Increment_Last; 1735 Linker_Options.Table (Linker_Options.Last) := Switches (J); 1736 end loop; 1737 end if; 1738 end; 1739 end if; 1740 1741 -- Perform consistency checks 1742 1743 -- Transform the .ali file name into the binder output file name 1744 1745 Make_Binder_File_Names : declare 1746 Fname : constant String := Base_Name (Ali_File_Name.all); 1747 Fname_Len : Integer := Fname'Length; 1748 1749 function Get_Maximum_File_Name_Length return Integer; 1750 pragma Import (C, Get_Maximum_File_Name_Length, 1751 "__gnat_get_maximum_file_name_length"); 1752 1753 Maximum_File_Name_Length : constant Integer := 1754 Get_Maximum_File_Name_Length; 1755 1756 Bind_File_Prefix : Types.String_Ptr; 1757 -- Contains prefix used for bind files 1758 1759 begin 1760 -- Set prefix 1761 1762 Bind_File_Prefix := new String'("b~"); 1763 1764 -- If the length of the binder file becomes too long due to 1765 -- the addition of the "b?" prefix, then truncate it. 1766 1767 if Maximum_File_Name_Length > 0 then 1768 while Fname_Len > 1769 Maximum_File_Name_Length - Bind_File_Prefix.all'Length 1770 loop 1771 Fname_Len := Fname_Len - 1; 1772 end loop; 1773 end if; 1774 1775 declare 1776 Fnam : constant String := 1777 Bind_File_Prefix.all & 1778 Fname (Fname'First .. Fname'First + Fname_Len - 1); 1779 1780 begin 1781 Binder_Spec_Src_File := new String'(Fnam & ".ads"); 1782 Binder_Body_Src_File := new String'(Fnam & ".adb"); 1783 Binder_Ali_File := new String'(Fnam & ".ali"); 1784 1785 Binder_Obj_File := new String'(Fnam & Get_Target_Object_Suffix.all); 1786 end; 1787 1788 if Fname_Len /= Fname'Length then 1789 Binder_Options.Increment_Last; 1790 Binder_Options.Table (Binder_Options.Last) := new String'("-o"); 1791 Binder_Options.Increment_Last; 1792 Binder_Options.Table (Binder_Options.Last) := Binder_Obj_File; 1793 end if; 1794 end Make_Binder_File_Names; 1795 1796 Process_Binder_File (Binder_Body_Src_File.all & ASCII.NUL); 1797 1798 -- Compile the binder file. This is fast, so we always do it, unless 1799 -- specifically told not to by the -n switch 1800 1801 if Compile_Bind_File then 1802 Bind_Step : declare 1803 Success : Boolean; 1804 1805 Args : Argument_List 1806 (1 .. Binder_Options_From_ALI.Last + Binder_Options.Last + 1); 1807 1808 begin 1809 for J in 1 .. Binder_Options_From_ALI.Last loop 1810 Args (J) := Binder_Options_From_ALI.Table (J); 1811 end loop; 1812 1813 for J in 1 .. Binder_Options.Last loop 1814 Args (Binder_Options_From_ALI.Last + J) := 1815 Binder_Options.Table (J); 1816 end loop; 1817 1818 -- Use the full path of the binder generated source, so that it is 1819 -- guaranteed that the debugger will find this source, even with 1820 -- STABS. 1821 1822 Args (Args'Last) := 1823 new String'(Normalize_Pathname (Binder_Body_Src_File.all)); 1824 1825 if Verbose_Mode then 1826 Write_Str (Base_Name (Gcc_Path.all)); 1827 1828 for J in Args'Range loop 1829 Write_Str (" "); 1830 Write_Str (Args (J).all); 1831 end loop; 1832 1833 Write_Eol; 1834 end if; 1835 1836 System.OS_Lib.Spawn (Gcc_Path.all, Args, Success); 1837 1838 if not Success then 1839 Exit_Program (E_Fatal); 1840 end if; 1841 end Bind_Step; 1842 end if; 1843 1844 -- In CodePeer mode, there's nothing left to do after the binder file has 1845 -- been compiled. 1846 1847 if Opt.CodePeer_Mode then 1848 if Tname_FD /= Invalid_FD then 1849 Delete (Tname); 1850 end if; 1851 1852 return; 1853 end if; 1854 1855 -- Now, actually link the program 1856 1857 Link_Step : declare 1858 Num_Args : Natural := 1859 (Linker_Options.Last - Linker_Options.First + 1) + 1860 (Gcc_Linker_Options.Last - Gcc_Linker_Options.First + 1) + 1861 (Linker_Objects.Last - Linker_Objects.First + 1); 1862 Stack_Op : Boolean := False; 1863 1864 begin 1865 -- Remove duplicate stack size setting from the Linker_Options table. 1866 -- The stack setting option "-Xlinker --stack=R,C" can be found 1867 -- in one line when set by a pragma Linker_Options or in two lines 1868 -- ("-Xlinker" then "--stack=R,C") when set on the command line. We 1869 -- also check for the "-Wl,--stack=R" style option. 1870 1871 -- We must remove the second stack setting option instance because 1872 -- the one on the command line will always be the first one. And any 1873 -- subsequent stack setting option will overwrite the previous one. 1874 -- This is done especially for GNAT/NT where we set the stack size 1875 -- for tasking programs by a pragma in the NT specific tasking 1876 -- package System.Task_Primitives.Operations. 1877 1878 -- Note: This is not a FOR loop that runs from Linker_Options.First 1879 -- to Linker_Options.Last, since operations within the loop can 1880 -- modify the length of the table. 1881 1882 Clean_Link_Option_Set : declare 1883 J : Natural; 1884 Shared_Libgcc_Seen : Boolean := False; 1885 Static_Libgcc_Seen : Boolean := False; 1886 1887 begin 1888 J := Linker_Options.First; 1889 while J <= Linker_Options.Last loop 1890 if Linker_Options.Table (J).all = "-Xlinker" 1891 and then J < Linker_Options.Last 1892 and then Linker_Options.Table (J + 1)'Length > 8 1893 and then Linker_Options.Table (J + 1) (1 .. 8) = "--stack=" 1894 then 1895 if Stack_Op then 1896 Linker_Options.Table (J .. Linker_Options.Last - 2) := 1897 Linker_Options.Table (J + 2 .. Linker_Options.Last); 1898 Linker_Options.Decrement_Last; 1899 Linker_Options.Decrement_Last; 1900 Num_Args := Num_Args - 2; 1901 1902 else 1903 Stack_Op := True; 1904 end if; 1905 end if; 1906 1907 -- Remove duplicate -shared-libgcc switches 1908 1909 if Linker_Options.Table (J).all = Shared_Libgcc_String then 1910 if Shared_Libgcc_Seen then 1911 Linker_Options.Table (J .. Linker_Options.Last - 1) := 1912 Linker_Options.Table (J + 1 .. Linker_Options.Last); 1913 Linker_Options.Decrement_Last; 1914 Num_Args := Num_Args - 1; 1915 1916 else 1917 Shared_Libgcc_Seen := True; 1918 end if; 1919 end if; 1920 1921 -- Remove duplicate -static-libgcc switches 1922 1923 if Linker_Options.Table (J).all = Static_Libgcc_String then 1924 if Static_Libgcc_Seen then 1925 Linker_Options.Table (J .. Linker_Options.Last - 1) := 1926 Linker_Options.Table (J + 1 .. Linker_Options.Last); 1927 Linker_Options.Decrement_Last; 1928 Num_Args := Num_Args - 1; 1929 1930 else 1931 Static_Libgcc_Seen := True; 1932 end if; 1933 end if; 1934 1935 -- Here we just check for a canonical form that matches the 1936 -- pragma Linker_Options set in the NT runtime. 1937 1938 if (Linker_Options.Table (J)'Length > 17 1939 and then Linker_Options.Table (J) (1 .. 17) = 1940 "-Xlinker --stack=") 1941 or else 1942 (Linker_Options.Table (J)'Length > 12 1943 and then Linker_Options.Table (J) (1 .. 12) = 1944 "-Wl,--stack=") 1945 then 1946 if Stack_Op then 1947 Linker_Options.Table (J .. Linker_Options.Last - 1) := 1948 Linker_Options.Table (J + 1 .. Linker_Options.Last); 1949 Linker_Options.Decrement_Last; 1950 Num_Args := Num_Args - 1; 1951 1952 else 1953 Stack_Op := True; 1954 end if; 1955 end if; 1956 1957 J := J + 1; 1958 end loop; 1959 1960 if Linker_Path = Gcc_Path then 1961 1962 -- For systems where the default is to link statically with 1963 -- libgcc, if gcc is not called with -shared-libgcc, call it 1964 -- with -static-libgcc, as there are some platforms where one 1965 -- of these two switches is compulsory to link. 1966 -- Don't push extra switches if we already saw one. 1967 1968 if Shared_Libgcc_Default = 'T' 1969 and then not Shared_Libgcc_Seen 1970 and then not Static_Libgcc_Seen 1971 then 1972 Linker_Options.Increment_Last; 1973 Linker_Options.Table (Linker_Options.Last) := Static_Libgcc; 1974 Num_Args := Num_Args + 1; 1975 end if; 1976 1977 -- Likewise, the reverse. 1978 1979 if Shared_Libgcc_Default = 'H' 1980 and then not Static_Libgcc_Seen 1981 and then not Shared_Libgcc_Seen 1982 then 1983 Linker_Options.Increment_Last; 1984 Linker_Options.Table (Linker_Options.Last) := Shared_Libgcc; 1985 Num_Args := Num_Args + 1; 1986 end if; 1987 end if; 1988 end Clean_Link_Option_Set; 1989 1990 -- Prepare arguments for call to linker 1991 1992 Call_Linker : declare 1993 Success : Boolean; 1994 Args : Argument_List (1 .. Num_Args + 1); 1995 Index : Integer := Args'First; 1996 1997 begin 1998 Args (Index) := Binder_Obj_File; 1999 2000 -- Add the object files and any -largs libraries 2001 2002 for J in Linker_Objects.First .. Linker_Objects.Last loop 2003 Index := Index + 1; 2004 Args (Index) := Linker_Objects.Table (J); 2005 end loop; 2006 2007 -- Add the linker options from the binder file 2008 2009 for J in Linker_Options.First .. Linker_Options.Last loop 2010 Index := Index + 1; 2011 Args (Index) := Linker_Options.Table (J); 2012 end loop; 2013 2014 -- Finally add the libraries from the --GCC= switch 2015 2016 for J in Gcc_Linker_Options.First .. Gcc_Linker_Options.Last loop 2017 Index := Index + 1; 2018 Args (Index) := Gcc_Linker_Options.Table (J); 2019 end loop; 2020 2021 if Verbose_Mode then 2022 Write_Str (Linker_Path.all); 2023 2024 for J in Args'Range loop 2025 Write_Str (" "); 2026 Write_Str (Args (J).all); 2027 end loop; 2028 2029 Write_Eol; 2030 2031 -- If we are on very verbose mode (-v -v) and a response file 2032 -- is used we display its content. 2033 2034 if Very_Verbose_Mode and then Tname_FD /= Invalid_FD then 2035 Write_Eol; 2036 Write_Str ("Response file (" & 2037 Tname (Tname'First .. Tname'Last - 1) & 2038 ") content : "); 2039 Write_Eol; 2040 2041 for J in 2042 Response_File_Objects.First .. Response_File_Objects.Last 2043 loop 2044 Write_Str (Response_File_Objects.Table (J).all); 2045 Write_Eol; 2046 end loop; 2047 2048 Write_Eol; 2049 end if; 2050 end if; 2051 2052 System.OS_Lib.Spawn (Linker_Path.all, Args, Success); 2053 2054 -- Delete the temporary file used in conjunction with linking if one 2055 -- was created. See Process_Bind_File for details. 2056 2057 if Tname_FD /= Invalid_FD then 2058 Delete (Tname); 2059 end if; 2060 2061 if not Success then 2062 Error_Msg ("error when calling " & Linker_Path.all); 2063 Exit_Program (E_Fatal); 2064 end if; 2065 end Call_Linker; 2066 end Link_Step; 2067 2068 -- Only keep the binder output file and it's associated object 2069 -- file if compiling with the -g option. These files are only 2070 -- useful if debugging. 2071 2072 if not Debug_Flag_Present then 2073 Delete (Binder_Ali_File.all & ASCII.NUL); 2074 Delete (Binder_Spec_Src_File.all & ASCII.NUL); 2075 Delete (Binder_Body_Src_File.all & ASCII.NUL); 2076 Delete (Binder_Obj_File.all & ASCII.NUL); 2077 end if; 2078 2079 Exit_Program (E_Success); 2080 2081exception 2082 when X : others => 2083 Write_Line (Exception_Information (X)); 2084 Exit_With_Error ("INTERNAL ERROR. Please report"); 2085end Gnatlink; 2086