1 //===- LibDriver.cpp - lib.exe-compatible driver --------------------------===//
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 // Defines an interface to a lib.exe-compatible driver that also understands
11 // bitcode files. Used by llvm-lib and lld-link /lib.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/ToolDrivers/llvm-lib/LibDriver.h"
16 #include "llvm/ADT/STLExtras.h"
17 #include "llvm/BinaryFormat/Magic.h"
18 #include "llvm/Object/ArchiveWriter.h"
19 #include "llvm/Option/Arg.h"
20 #include "llvm/Option/ArgList.h"
21 #include "llvm/Option/Option.h"
22 #include "llvm/Support/CommandLine.h"
23 #include "llvm/Support/Path.h"
24 #include "llvm/Support/Process.h"
25 #include "llvm/Support/StringSaver.h"
26 #include "llvm/Support/raw_ostream.h"
34 #define OPTION(_1, _2, ID, _4, _5, _6, _7, _8, _9, _10, _11, _12) OPT_##ID,
35 #include "Options.inc"
39 #define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
40 #include "Options.inc"
43 static const opt::OptTable::Info InfoTable[] = {
44 #define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X7, X8, X9, X10, X11, X12) \
45 {X1, X2, X10, X11, OPT_##ID, opt::Option::KIND##Class, \
46 X9, X8, OPT_##GROUP, OPT_##ALIAS, X7, X12},
47 #include "Options.inc"
51 class LibOptTable : public opt::OptTable {
53 LibOptTable() : OptTable(InfoTable, true) {}
58 static std::string getOutputPath(opt::InputArgList *Args,
59 const NewArchiveMember &FirstMember) {
60 if (auto *Arg = Args->getLastArg(OPT_out))
61 return Arg->getValue();
62 SmallString<128> Val = StringRef(FirstMember.Buf->getBufferIdentifier());
63 sys::path::replace_extension(Val, ".lib");
67 static std::vector<StringRef> getSearchPaths(opt::InputArgList *Args,
69 std::vector<StringRef> Ret;
70 // Add current directory as first item of the search path.
73 // Add /libpath flags.
74 for (auto *Arg : Args->filtered(OPT_libpath))
75 Ret.push_back(Arg->getValue());
78 Optional<std::string> EnvOpt = sys::Process::GetEnv("LIB");
79 if (!EnvOpt.hasValue())
81 StringRef Env = Saver.save(*EnvOpt);
82 while (!Env.empty()) {
84 std::tie(Path, Env) = Env.split(';');
90 static std::string findInputFile(StringRef File, ArrayRef<StringRef> Paths) {
91 for (StringRef Dir : Paths) {
92 SmallString<128> Path = Dir;
93 sys::path::append(Path, File);
94 if (sys::fs::exists(Path))
95 return Path.str().str();
100 int llvm::libDriverMain(ArrayRef<const char *> ArgsArr) {
101 BumpPtrAllocator Alloc;
102 StringSaver Saver(Alloc);
104 // Parse command line arguments.
105 SmallVector<const char *, 20> NewArgs(ArgsArr.begin(), ArgsArr.end());
106 cl::ExpandResponseFiles(Saver, cl::TokenizeWindowsCommandLine, NewArgs);
110 unsigned MissingIndex;
111 unsigned MissingCount;
112 opt::InputArgList Args =
113 Table.ParseArgs(ArgsArr.slice(1), MissingIndex, MissingCount);
115 llvm::errs() << "missing arg value for \""
116 << Args.getArgString(MissingIndex) << "\", expected "
118 << (MissingCount == 1 ? " argument.\n" : " arguments.\n");
121 for (auto *Arg : Args.filtered(OPT_UNKNOWN))
122 llvm::errs() << "ignoring unknown argument: " << Arg->getSpelling() << "\n";
125 if (Args.hasArg(OPT_help)) {
126 Table.PrintHelp(outs(), ArgsArr[0], "LLVM Lib");
130 // If no input files, silently do nothing to match lib.exe.
131 if (!Args.hasArgNoClaim(OPT_INPUT))
134 std::vector<StringRef> SearchPaths = getSearchPaths(&Args, Saver);
136 // Create a NewArchiveMember for each input file.
137 std::vector<NewArchiveMember> Members;
138 for (auto *Arg : Args.filtered(OPT_INPUT)) {
139 std::string Path = findInputFile(Arg->getValue(), SearchPaths);
141 llvm::errs() << Arg->getValue() << ": no such file or directory\n";
145 Expected<NewArchiveMember> MOrErr =
146 NewArchiveMember::getFile(Saver.save(Path), /*Deterministic=*/true);
148 handleAllErrors(MOrErr.takeError(), [&](const ErrorInfoBase &EIB) {
149 llvm::errs() << Arg->getValue() << ": " << EIB.message() << "\n";
154 file_magic Magic = identify_magic(MOrErr->Buf->getBuffer());
155 if (Magic != file_magic::coff_object && Magic != file_magic::bitcode &&
156 Magic != file_magic::windows_resource) {
157 llvm::errs() << Arg->getValue()
158 << ": not a COFF object, bitcode or resource file\n";
161 Members.emplace_back(std::move(*MOrErr));
164 // Create an archive file.
165 std::string OutputPath = getOutputPath(&Args, Members[0]);
167 writeArchive(OutputPath, Members,
168 /*WriteSymtab=*/true, object::Archive::K_GNU,
169 /*Deterministic*/ true, Args.hasArg(OPT_llvmlibthin))) {
170 handleAllErrors(std::move(E), [&](const ErrorInfoBase &EI) {
171 llvm::errs() << OutputPath << ": " << EI.message() << "\n";