| //===- DriverUtils.cpp ----------------------------------------------------===// |
| // |
| // The LLVM Linker |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file contains utility functions for the driver. Because there |
| // are so many small functions, we created this separate file to make |
| // Driver.cpp less cluttered. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "Driver.h" |
| #include "Error.h" |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/FileSystem.h" |
| #include "llvm/Support/Path.h" |
| #include "llvm/Support/StringSaver.h" |
| |
| using namespace llvm; |
| |
| using namespace lld; |
| using namespace lld::elf2; |
| |
| // Create OptTable |
| |
| // Create prefix string literals used in Options.td |
| #define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE; |
| #include "Options.inc" |
| #undef PREFIX |
| |
| // Create table mapping all options defined in Options.td |
| static const opt::OptTable::Info infoTable[] = { |
| #define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X6, X7, X8, X9, X10) \ |
| { \ |
| X1, X2, X9, X10, OPT_##ID, opt::Option::KIND##Class, X8, X7, OPT_##GROUP, \ |
| OPT_##ALIAS, X6 \ |
| } \ |
| , |
| #include "Options.inc" |
| #undef OPTION |
| }; |
| |
| class ELFOptTable : public opt::OptTable { |
| public: |
| ELFOptTable() : OptTable(infoTable) {} |
| }; |
| |
| // Parses a given list of options. |
| opt::InputArgList elf2::parseArgs(llvm::BumpPtrAllocator *A, |
| ArrayRef<const char *> Argv) { |
| // Make InputArgList from string vectors. |
| ELFOptTable Table; |
| unsigned MissingIndex; |
| unsigned MissingCount; |
| |
| // Expand response files. '@<filename>' is replaced by the file's contents. |
| SmallVector<const char *, 256> Vec(Argv.data(), Argv.data() + Argv.size()); |
| StringSaver Saver(*A); |
| llvm::cl::ExpandResponseFiles(Saver, llvm::cl::TokenizeGNUCommandLine, Vec); |
| |
| // Parse options and then do error checking. |
| opt::InputArgList Args = Table.ParseArgs(Vec, MissingIndex, MissingCount); |
| if (MissingCount) |
| error(Twine("missing arg value for \"") + Args.getArgString(MissingIndex) + |
| "\", expected " + Twine(MissingCount) + |
| (MissingCount == 1 ? " argument.\n" : " arguments")); |
| |
| iterator_range<opt::arg_iterator> Unknowns = Args.filtered(OPT_UNKNOWN); |
| for (auto *Arg : Unknowns) |
| warning("warning: unknown argument: " + Arg->getSpelling()); |
| if (Unknowns.begin() != Unknowns.end()) |
| error("unknown argument(s) found"); |
| |
| return Args; |
| } |
| |
| std::string elf2::findFromSearchPaths(StringRef Path) { |
| for (StringRef Dir : Config->SearchPaths) { |
| std::string FullPath = buildSysrootedPath(Dir, Path); |
| if (sys::fs::exists(FullPath)) |
| return FullPath; |
| } |
| return ""; |
| } |
| |
| // Searches a given library from input search paths, which are filled |
| // from -L command line switches. Returns a path to an existent library file. |
| std::string elf2::searchLibrary(StringRef Path) { |
| std::vector<std::string> Names; |
| if (Path[0] == ':') { |
| Names.push_back(Path.drop_front()); |
| } else { |
| if (!Config->Static) |
| Names.push_back(("lib" + Path + ".so").str()); |
| Names.push_back(("lib" + Path + ".a").str()); |
| } |
| for (const std::string &Name : Names) { |
| std::string S = findFromSearchPaths(Name); |
| if (!S.empty()) |
| return S; |
| } |
| error("Unable to find library -l" + Path); |
| } |
| |
| // Makes a path by concatenating Dir and File. |
| // If Dir starts with '=' the result will be preceded by Sysroot, |
| // which can be set with --sysroot command line switch. |
| std::string elf2::buildSysrootedPath(StringRef Dir, StringRef File) { |
| SmallString<128> Path; |
| if (Dir.startswith("=")) |
| sys::path::append(Path, Config->Sysroot, Dir.substr(1), File); |
| else |
| sys::path::append(Path, Dir, File); |
| return Path.str(); |
| } |