1 //===-- llvm-ar.cpp - LLVM archive librarian utility ----------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Builds up (relatively) standard unix archive files (.a) containing LLVM
11 // bitcode or other files.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/ADT/StringSwitch.h"
16 #include "llvm/ADT/Triple.h"
17 #include "llvm/IR/LLVMContext.h"
18 #include "llvm/IR/Module.h"
19 #include "llvm/LibDriver/LibDriver.h"
20 #include "llvm/Object/Archive.h"
21 #include "llvm/Object/ArchiveWriter.h"
22 #include "llvm/Object/MachO.h"
23 #include "llvm/Object/ObjectFile.h"
24 #include "llvm/Support/Chrono.h"
25 #include "llvm/Support/CommandLine.h"
26 #include "llvm/Support/Errc.h"
27 #include "llvm/Support/FileSystem.h"
28 #include "llvm/Support/Format.h"
29 #include "llvm/Support/LineIterator.h"
30 #include "llvm/Support/ManagedStatic.h"
31 #include "llvm/Support/MemoryBuffer.h"
32 #include "llvm/Support/Path.h"
33 #include "llvm/Support/PrettyStackTrace.h"
34 #include "llvm/Support/Signals.h"
35 #include "llvm/Support/TargetSelect.h"
36 #include "llvm/Support/ToolOutputFile.h"
37 #include "llvm/Support/raw_ostream.h"
42 #if !defined(_MSC_VER) && !defined(__MINGW32__)
50 // The name this program was invoked as.
51 static StringRef ToolName;
53 // Show the error message and exit.
54 LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) {
55 errs() << ToolName << ": " << Error << ".\n";
59 static void failIfError(std::error_code EC, Twine Context = "") {
63 std::string ContextStr = Context.str();
66 fail(Context + ": " + EC.message());
69 static void failIfError(Error E, Twine Context = "") {
73 handleAllErrors(std::move(E), [&](const llvm::ErrorInfoBase &EIB) {
74 std::string ContextStr = Context.str();
77 fail(Context + ": " + EIB.message());
81 // llvm-ar/llvm-ranlib remaining positional arguments.
82 static cl::list<std::string>
83 RestOfArgs(cl::Positional, cl::ZeroOrMore,
84 cl::desc("[relpos] [count] <archive-file> [members]..."));
86 static cl::opt<bool> MRI("M", cl::desc(""));
87 static cl::opt<std::string> Plugin("plugin", cl::desc("plugin (ignored for compatibility"));
90 enum Format { Default, GNU, BSD, DARWIN };
93 static cl::opt<Format>
94 FormatOpt("format", cl::desc("Archive format to create"),
95 cl::values(clEnumValN(Default, "default", "default"),
96 clEnumValN(GNU, "gnu", "gnu"),
97 clEnumValN(DARWIN, "darwin", "darwin"),
98 clEnumValN(BSD, "bsd", "bsd")));
100 static std::string Options;
102 // Provide additional help output explaining the operations and modifiers of
103 // llvm-ar. This object instructs the CommandLine library to print the text of
104 // the constructor when the --help option is given.
105 static cl::extrahelp MoreHelp(
107 " d[NsS] - delete file(s) from the archive\n"
108 " m[abiSs] - move file(s) in the archive\n"
109 " p[kN] - print file(s) found in the archive\n"
110 " q[ufsS] - quick append file(s) to the archive\n"
111 " r[abfiuRsS] - replace or insert file(s) into the archive\n"
112 " t - display contents of archive\n"
113 " x[No] - extract file(s) from the archive\n"
114 "\nMODIFIERS (operation specific):\n"
115 " [a] - put file(s) after [relpos]\n"
116 " [b] - put file(s) before [relpos] (same as [i])\n"
117 " [i] - put file(s) before [relpos] (same as [b])\n"
118 " [o] - preserve original dates\n"
119 " [s] - create an archive index (cf. ranlib)\n"
120 " [S] - do not build a symbol table\n"
121 " [T] - create a thin archive\n"
122 " [u] - update only files newer than archive contents\n"
123 "\nMODIFIERS (generic):\n"
124 " [c] - do not warn if the library had to be created\n"
125 " [v] - be verbose about actions taken\n"
128 // This enumeration delineates the kinds of operations on an archive
129 // that are permitted.
130 enum ArchiveOperation {
131 Print, ///< Print the contents of the archive
132 Delete, ///< Delete the specified members
133 Move, ///< Move members to end or as given by {a,b,i} modifiers
134 QuickAppend, ///< Quickly append to end of archive
135 ReplaceOrInsert, ///< Replace or Insert members
136 DisplayTable, ///< Display the table of contents
137 Extract, ///< Extract files back to file system
138 CreateSymTab ///< Create a symbol table in an existing archive
141 // Modifiers to follow operation to vary behavior
142 static bool AddAfter = false; ///< 'a' modifier
143 static bool AddBefore = false; ///< 'b' modifier
144 static bool Create = false; ///< 'c' modifier
145 static bool OriginalDates = false; ///< 'o' modifier
146 static bool OnlyUpdate = false; ///< 'u' modifier
147 static bool Verbose = false; ///< 'v' modifier
148 static bool Symtab = true; ///< 's' modifier
149 static bool Deterministic = true; ///< 'D' and 'U' modifiers
150 static bool Thin = false; ///< 'T' modifier
152 // Relative Positional Argument (for insert/move). This variable holds
153 // the name of the archive member to which the 'a', 'b' or 'i' modifier
154 // refers. Only one of 'a', 'b' or 'i' can be specified so we only need
156 static std::string RelPos;
158 // This variable holds the name of the archive file as given on the
160 static std::string ArchiveName;
162 // This variable holds the list of member files to proecess, as given
163 // on the command line.
164 static std::vector<StringRef> Members;
166 // Show the error message, the help message and exit.
167 LLVM_ATTRIBUTE_NORETURN static void
168 show_help(const std::string &msg) {
169 errs() << ToolName << ": " << msg << "\n\n";
170 cl::PrintHelpMessage();
174 // Extract the member filename from the command line for the [relpos] argument
175 // associated with a, b, and i modifiers
176 static void getRelPos() {
177 if(RestOfArgs.size() == 0)
178 show_help("Expected [relpos] for a, b, or i modifier");
179 RelPos = RestOfArgs[0];
180 RestOfArgs.erase(RestOfArgs.begin());
183 static void getOptions() {
184 if(RestOfArgs.size() == 0)
185 show_help("Expected options");
186 Options = RestOfArgs[0];
187 RestOfArgs.erase(RestOfArgs.begin());
190 // Get the archive file name from the command line
191 static void getArchive() {
192 if(RestOfArgs.size() == 0)
193 show_help("An archive name must be specified");
194 ArchiveName = RestOfArgs[0];
195 RestOfArgs.erase(RestOfArgs.begin());
198 // Copy over remaining items in RestOfArgs to our Members vector
199 static void getMembers() {
200 for (auto &Arg : RestOfArgs)
201 Members.push_back(Arg);
204 static void runMRIScript();
206 // Parse the command line options as presented and return the operation
207 // specified. Process all modifiers and check to make sure that constraints on
208 // modifier/operation pairs have not been violated.
209 static ArchiveOperation parseCommandLine() {
211 if (!RestOfArgs.empty())
212 fail("Cannot mix -M and other options");
218 // Keep track of number of operations. We can only specify one
220 unsigned NumOperations = 0;
222 // Keep track of the number of positional modifiers (a,b,i). Only
223 // one can be specified.
224 unsigned NumPositional = 0;
226 // Keep track of which operation was requested
227 ArchiveOperation Operation;
229 bool MaybeJustCreateSymTab = false;
231 for(unsigned i=0; i<Options.size(); ++i) {
233 case 'd': ++NumOperations; Operation = Delete; break;
234 case 'm': ++NumOperations; Operation = Move ; break;
235 case 'p': ++NumOperations; Operation = Print; break;
236 case 'q': ++NumOperations; Operation = QuickAppend; break;
237 case 'r': ++NumOperations; Operation = ReplaceOrInsert; break;
238 case 't': ++NumOperations; Operation = DisplayTable; break;
239 case 'x': ++NumOperations; Operation = Extract; break;
240 case 'c': Create = true; break;
241 case 'l': /* accepted but unused */ break;
242 case 'o': OriginalDates = true; break;
245 MaybeJustCreateSymTab = true;
250 case 'u': OnlyUpdate = true; break;
251 case 'v': Verbose = true; break;
268 Deterministic = true;
271 Deterministic = false;
277 cl::PrintHelpMessage();
281 // At this point, the next thing on the command line must be
285 // Everything on the command line at this point is a member.
288 if (NumOperations == 0 && MaybeJustCreateSymTab) {
290 Operation = CreateSymTab;
291 if (!Members.empty())
292 show_help("The s operation takes only an archive as argument");
295 // Perform various checks on the operation/modifier specification
296 // to make sure we are dealing with a legal request.
297 if (NumOperations == 0)
298 show_help("You must specify at least one of the operations");
299 if (NumOperations > 1)
300 show_help("Only one operation may be specified");
301 if (NumPositional > 1)
302 show_help("You may only specify one of a, b, and i modifiers");
303 if (AddAfter || AddBefore) {
304 if (Operation != Move && Operation != ReplaceOrInsert)
305 show_help("The 'a', 'b' and 'i' modifiers can only be specified with "
306 "the 'm' or 'r' operations");
308 if (OriginalDates && Operation != Extract)
309 show_help("The 'o' modifier is only applicable to the 'x' operation");
310 if (OnlyUpdate && Operation != ReplaceOrInsert)
311 show_help("The 'u' modifier is only applicable to the 'r' operation");
313 // Return the parsed operation to the caller
317 // Implements the 'p' operation. This function traverses the archive
318 // looking for members that match the path list.
319 static void doPrint(StringRef Name, const object::Archive::Child &C) {
321 outs() << "Printing " << Name << "\n";
323 Expected<StringRef> DataOrErr = C.getBuffer();
324 failIfError(DataOrErr.takeError());
325 StringRef Data = *DataOrErr;
326 outs().write(Data.data(), Data.size());
329 // Utility function for printing out the file mode when the 't' operation is in
331 static void printMode(unsigned mode) {
332 outs() << ((mode & 004) ? "r" : "-");
333 outs() << ((mode & 002) ? "w" : "-");
334 outs() << ((mode & 001) ? "x" : "-");
337 // Implement the 't' operation. This function prints out just
338 // the file names of each of the members. However, if verbose mode is requested
339 // ('v' modifier) then the file type, permission mode, user, group, size, and
340 // modification time are also printed.
341 static void doDisplayTable(StringRef Name, const object::Archive::Child &C) {
343 Expected<sys::fs::perms> ModeOrErr = C.getAccessMode();
344 failIfError(ModeOrErr.takeError());
345 sys::fs::perms Mode = ModeOrErr.get();
346 printMode((Mode >> 6) & 007);
347 printMode((Mode >> 3) & 007);
348 printMode(Mode & 007);
349 Expected<unsigned> UIDOrErr = C.getUID();
350 failIfError(UIDOrErr.takeError());
351 outs() << ' ' << UIDOrErr.get();
352 Expected<unsigned> GIDOrErr = C.getGID();
353 failIfError(GIDOrErr.takeError());
354 outs() << '/' << GIDOrErr.get();
355 Expected<uint64_t> Size = C.getSize();
356 failIfError(Size.takeError());
357 outs() << ' ' << format("%6llu", Size.get());
358 auto ModTimeOrErr = C.getLastModified();
359 failIfError(ModTimeOrErr.takeError());
360 outs() << ' ' << ModTimeOrErr.get();
364 if (C.getParent()->isThin()) {
365 outs() << sys::path::parent_path(ArchiveName);
368 outs() << Name << "\n";
371 // Implement the 'x' operation. This function extracts files back to the file
373 static void doExtract(StringRef Name, const object::Archive::Child &C) {
374 // Retain the original mode.
375 Expected<sys::fs::perms> ModeOrErr = C.getAccessMode();
376 failIfError(ModeOrErr.takeError());
377 sys::fs::perms Mode = ModeOrErr.get();
380 failIfError(sys::fs::openFileForWrite(sys::path::filename(Name), FD,
381 sys::fs::F_None, Mode),
385 raw_fd_ostream file(FD, false);
387 // Get the data and its length
388 Expected<StringRef> BufOrErr = C.getBuffer();
389 failIfError(BufOrErr.takeError());
390 StringRef Data = BufOrErr.get();
393 file.write(Data.data(), Data.size());
396 // If we're supposed to retain the original modification times, etc. do so
399 auto ModTimeOrErr = C.getLastModified();
400 failIfError(ModTimeOrErr.takeError());
402 sys::fs::setLastModificationAndAccessTime(FD, ModTimeOrErr.get()));
406 fail("Could not close the file");
409 static bool shouldCreateArchive(ArchiveOperation Op) {
420 case ReplaceOrInsert:
424 llvm_unreachable("Missing entry in covered switch.");
427 static void performReadOperation(ArchiveOperation Operation,
428 object::Archive *OldArchive) {
429 if (Operation == Extract && OldArchive->isThin())
430 fail("extracting from a thin archive is not supported");
432 bool Filter = !Members.empty();
434 Error Err = Error::success();
435 for (auto &C : OldArchive->children(Err)) {
436 Expected<StringRef> NameOrErr = C.getName();
437 failIfError(NameOrErr.takeError());
438 StringRef Name = NameOrErr.get();
441 auto I = find(Members, Name);
442 if (I == Members.end())
449 llvm_unreachable("Not a read operation");
454 doDisplayTable(Name, C);
461 failIfError(std::move(Err));
466 for (StringRef Name : Members)
467 errs() << Name << " was not found\n";
471 static void addMember(std::vector<NewArchiveMember> &Members,
472 StringRef FileName, int Pos = -1) {
473 Expected<NewArchiveMember> NMOrErr =
474 NewArchiveMember::getFile(FileName, Deterministic);
475 failIfError(NMOrErr.takeError(), FileName);
477 Members.push_back(std::move(*NMOrErr));
479 Members[Pos] = std::move(*NMOrErr);
482 static void addMember(std::vector<NewArchiveMember> &Members,
483 const object::Archive::Child &M, int Pos = -1) {
484 if (Thin && !M.getParent()->isThin())
485 fail("Cannot convert a regular archive to a thin one");
486 Expected<NewArchiveMember> NMOrErr =
487 NewArchiveMember::getOldMember(M, Deterministic);
488 failIfError(NMOrErr.takeError());
490 Members.push_back(std::move(*NMOrErr));
492 Members[Pos] = std::move(*NMOrErr);
503 static InsertAction computeInsertAction(ArchiveOperation Operation,
504 const object::Archive::Child &Member,
506 std::vector<StringRef>::iterator &Pos) {
507 if (Operation == QuickAppend || Members.empty())
508 return IA_AddOldMember;
510 auto MI = find_if(Members, [Name](StringRef Path) {
511 return Name == sys::path::filename(Path);
514 if (MI == Members.end())
515 return IA_AddOldMember;
519 if (Operation == Delete)
522 if (Operation == Move)
523 return IA_MoveOldMember;
525 if (Operation == ReplaceOrInsert) {
526 StringRef PosName = sys::path::filename(RelPos);
529 return IA_AddNewMeber;
530 return IA_MoveNewMember;
533 // We could try to optimize this to a fstat, but it is not a common
535 sys::fs::file_status Status;
536 failIfError(sys::fs::status(*MI, Status), *MI);
537 auto ModTimeOrErr = Member.getLastModified();
538 failIfError(ModTimeOrErr.takeError());
539 if (Status.getLastModificationTime() < ModTimeOrErr.get()) {
541 return IA_AddOldMember;
542 return IA_MoveOldMember;
546 return IA_AddNewMeber;
547 return IA_MoveNewMember;
549 llvm_unreachable("No such operation");
552 // We have to walk this twice and computing it is not trivial, so creating an
553 // explicit std::vector is actually fairly efficient.
554 static std::vector<NewArchiveMember>
555 computeNewArchiveMembers(ArchiveOperation Operation,
556 object::Archive *OldArchive) {
557 std::vector<NewArchiveMember> Ret;
558 std::vector<NewArchiveMember> Moved;
560 StringRef PosName = sys::path::filename(RelPos);
562 Error Err = Error::success();
563 for (auto &Child : OldArchive->children(Err)) {
564 int Pos = Ret.size();
565 Expected<StringRef> NameOrErr = Child.getName();
566 failIfError(NameOrErr.takeError());
567 StringRef Name = NameOrErr.get();
568 if (Name == PosName) {
569 assert(AddAfter || AddBefore);
576 std::vector<StringRef>::iterator MemberI = Members.end();
577 InsertAction Action =
578 computeInsertAction(Operation, Child, Name, MemberI);
580 case IA_AddOldMember:
581 addMember(Ret, Child);
584 addMember(Ret, *MemberI);
588 case IA_MoveOldMember:
589 addMember(Moved, Child);
591 case IA_MoveNewMember:
592 addMember(Moved, *MemberI);
595 if (MemberI != Members.end())
596 Members.erase(MemberI);
598 failIfError(std::move(Err));
601 if (Operation == Delete)
604 if (!RelPos.empty() && InsertPos == -1)
605 fail("Insertion point not found");
608 InsertPos = Ret.size();
610 assert(unsigned(InsertPos) <= Ret.size());
612 for (auto &M : Moved) {
613 Ret.insert(Ret.begin() + Pos, std::move(M));
617 for (unsigned I = 0; I != Members.size(); ++I)
618 Ret.insert(Ret.begin() + InsertPos, NewArchiveMember());
620 for (auto &Member : Members) {
621 addMember(Ret, Member, Pos);
628 static object::Archive::Kind getDefaultForHost() {
629 return Triple(sys::getProcessTriple()).isOSDarwin()
630 ? object::Archive::K_DARWIN
631 : object::Archive::K_GNU;
634 static object::Archive::Kind getKindFromMember(const NewArchiveMember &Member) {
635 Expected<std::unique_ptr<object::ObjectFile>> OptionalObject =
636 object::ObjectFile::createObjectFile(Member.Buf->getMemBufferRef());
639 return isa<object::MachOObjectFile>(**OptionalObject)
640 ? object::Archive::K_DARWIN
641 : object::Archive::K_GNU;
643 // squelch the error in case we had a non-object file
644 consumeError(OptionalObject.takeError());
645 return getDefaultForHost();
649 performWriteOperation(ArchiveOperation Operation,
650 object::Archive *OldArchive,
651 std::unique_ptr<MemoryBuffer> OldArchiveBuf,
652 std::vector<NewArchiveMember> *NewMembersP) {
653 std::vector<NewArchiveMember> NewMembers;
655 NewMembers = computeNewArchiveMembers(Operation, OldArchive);
657 object::Archive::Kind Kind;
661 Kind = object::Archive::K_GNU;
663 Kind = OldArchive->kind();
664 else if (NewMembersP)
665 Kind = NewMembersP->size() ? getKindFromMember(NewMembersP->front())
666 : getDefaultForHost();
668 Kind = NewMembers.size() ? getKindFromMember(NewMembers.front())
669 : getDefaultForHost();
672 Kind = object::Archive::K_GNU;
676 fail("Only the gnu format has a thin mode");
677 Kind = object::Archive::K_BSD;
681 fail("Only the gnu format has a thin mode");
682 Kind = object::Archive::K_DARWIN;
686 std::pair<StringRef, std::error_code> Result =
687 writeArchive(ArchiveName, NewMembersP ? *NewMembersP : NewMembers, Symtab,
688 Kind, Deterministic, Thin, std::move(OldArchiveBuf));
689 failIfError(Result.second, Result.first);
692 static void createSymbolTable(object::Archive *OldArchive) {
693 // When an archive is created or modified, if the s option is given, the
694 // resulting archive will have a current symbol table. If the S option
695 // is given, it will have no symbol table.
696 // In summary, we only need to update the symbol table if we have none.
697 // This is actually very common because of broken build systems that think
698 // they have to run ranlib.
699 if (OldArchive->hasSymbolTable())
702 performWriteOperation(CreateSymTab, OldArchive, nullptr, nullptr);
705 static void performOperation(ArchiveOperation Operation,
706 object::Archive *OldArchive,
707 std::unique_ptr<MemoryBuffer> OldArchiveBuf,
708 std::vector<NewArchiveMember> *NewMembers) {
713 performReadOperation(Operation, OldArchive);
719 case ReplaceOrInsert:
720 performWriteOperation(Operation, OldArchive, std::move(OldArchiveBuf),
724 createSymbolTable(OldArchive);
727 llvm_unreachable("Unknown operation.");
730 static int performOperation(ArchiveOperation Operation,
731 std::vector<NewArchiveMember> *NewMembers) {
732 // Create or open the archive object.
733 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
734 MemoryBuffer::getFile(ArchiveName, -1, false);
735 std::error_code EC = Buf.getError();
736 if (EC && EC != errc::no_such_file_or_directory)
737 fail("error opening '" + ArchiveName + "': " + EC.message() + "!");
740 Error Err = Error::success();
741 object::Archive Archive(Buf.get()->getMemBufferRef(), Err);
742 EC = errorToErrorCode(std::move(Err));
744 "error loading '" + ArchiveName + "': " + EC.message() + "!");
745 performOperation(Operation, &Archive, std::move(Buf.get()), NewMembers);
749 assert(EC == errc::no_such_file_or_directory);
751 if (!shouldCreateArchive(Operation)) {
752 failIfError(EC, Twine("error loading '") + ArchiveName + "'");
755 // Produce a warning if we should and we're creating the archive
756 errs() << ToolName << ": creating " << ArchiveName << "\n";
760 performOperation(Operation, nullptr, nullptr, NewMembers);
764 static void runMRIScript() {
765 enum class MRICommand { AddLib, AddMod, Create, Save, End, Invalid };
767 ErrorOr<std::unique_ptr<MemoryBuffer>> Buf = MemoryBuffer::getSTDIN();
768 failIfError(Buf.getError());
769 const MemoryBuffer &Ref = *Buf.get();
771 std::vector<NewArchiveMember> NewMembers;
772 std::vector<std::unique_ptr<MemoryBuffer>> ArchiveBuffers;
773 std::vector<std::unique_ptr<object::Archive>> Archives;
775 for (line_iterator I(Ref, /*SkipBlanks*/ true, ';'), E; I != E; ++I) {
777 StringRef CommandStr, Rest;
778 std::tie(CommandStr, Rest) = Line.split(' ');
780 if (!Rest.empty() && Rest.front() == '"' && Rest.back() == '"')
781 Rest = Rest.drop_front().drop_back();
782 auto Command = StringSwitch<MRICommand>(CommandStr.lower())
783 .Case("addlib", MRICommand::AddLib)
784 .Case("addmod", MRICommand::AddMod)
785 .Case("create", MRICommand::Create)
786 .Case("save", MRICommand::Save)
787 .Case("end", MRICommand::End)
788 .Default(MRICommand::Invalid);
791 case MRICommand::AddLib: {
792 auto BufOrErr = MemoryBuffer::getFile(Rest, -1, false);
793 failIfError(BufOrErr.getError(), "Could not open library");
794 ArchiveBuffers.push_back(std::move(*BufOrErr));
796 object::Archive::create(ArchiveBuffers.back()->getMemBufferRef());
797 failIfError(errorToErrorCode(LibOrErr.takeError()),
798 "Could not parse library");
799 Archives.push_back(std::move(*LibOrErr));
800 object::Archive &Lib = *Archives.back();
802 Error Err = Error::success();
803 for (auto &Member : Lib.children(Err))
804 addMember(NewMembers, Member);
805 failIfError(std::move(Err));
809 case MRICommand::AddMod:
810 addMember(NewMembers, Rest);
812 case MRICommand::Create:
814 if (!ArchiveName.empty())
815 fail("Editing multiple archives not supported");
817 fail("File already saved");
820 case MRICommand::Save:
823 case MRICommand::End:
825 case MRICommand::Invalid:
826 fail("Unknown command: " + CommandStr);
830 // Nothing to do if not saved.
832 performOperation(ReplaceOrInsert, &NewMembers);
836 static int ar_main() {
837 // Do our own parsing of the command line because the CommandLine utility
838 // can't handle the grouped positional parameters without a dash.
839 ArchiveOperation Operation = parseCommandLine();
840 return performOperation(Operation, nullptr);
843 static int ranlib_main() {
844 if (RestOfArgs.size() != 1)
845 fail(ToolName + " takes just one archive as an argument");
846 ArchiveName = RestOfArgs[0];
847 return performOperation(CreateSymTab, nullptr);
850 int main(int argc, char **argv) {
852 // Print a stack trace if we signal out.
853 sys::PrintStackTraceOnErrorSignal(argv[0]);
854 PrettyStackTraceProgram X(argc, argv);
855 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
857 llvm::InitializeAllTargetInfos();
858 llvm::InitializeAllTargetMCs();
859 llvm::InitializeAllAsmParsers();
861 StringRef Stem = sys::path::stem(ToolName);
862 if (Stem.find("ranlib") == StringRef::npos &&
863 Stem.find("lib") != StringRef::npos)
864 return libDriverMain(makeArrayRef(argv, argc));
866 // Have the command line options parsed and handle things
867 // like --help and --version.
868 cl::ParseCommandLineOptions(argc, argv,
869 "LLVM Archiver (llvm-ar)\n\n"
870 " This program archives bitcode files into single libraries\n"
873 if (Stem.find("ranlib") != StringRef::npos)
874 return ranlib_main();
875 if (Stem.find("ar") != StringRef::npos)
877 fail("Not ranlib, ar or lib!");