7859216b28
The option numbers in the macro were off by one which leads to some confusion. There are actually 12 arguments to this macro. Differential Revision: https://reviews.llvm.org/D34413 llvm-svn: 305823
209 lines
7.1 KiB
C++
209 lines
7.1 KiB
C++
//===- DriverUtils.cpp ----------------------------------------------------===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains utility functions for the driver. Because there
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// are so many small functions, we created this separate file to make
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// Driver.cpp less cluttered.
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//
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//===----------------------------------------------------------------------===//
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#include "Driver.h"
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#include "Error.h"
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#include "Memory.h"
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#include "lld/Config/Version.h"
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#include "lld/Core/Reproduce.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Option/Option.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/Process.h"
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using namespace llvm;
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using namespace llvm::sys;
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using namespace lld;
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using namespace lld::elf;
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// Create OptTable
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// Create prefix string literals used in Options.td
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#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
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#include "Options.inc"
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#undef PREFIX
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// Create table mapping all options defined in Options.td
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static const opt::OptTable::Info OptInfo[] = {
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#define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X7, X8, X9, X10, X11, X12) \
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{X1, X2, X10, X11, OPT_##ID, opt::Option::KIND##Class, \
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X9, X8, OPT_##GROUP, OPT_##ALIAS, X7, X12},
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#include "Options.inc"
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#undef OPTION
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};
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ELFOptTable::ELFOptTable() : OptTable(OptInfo) {}
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// Parse -color-diagnostics={auto,always,never} or -no-color-diagnostics.
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static bool getColorDiagnostics(opt::InputArgList &Args) {
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auto *Arg = Args.getLastArg(OPT_color_diagnostics, OPT_color_diagnostics_eq,
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OPT_no_color_diagnostics);
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if (!Arg)
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return ErrorOS->has_colors();
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if (Arg->getOption().getID() == OPT_color_diagnostics)
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return true;
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if (Arg->getOption().getID() == OPT_no_color_diagnostics)
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return false;
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StringRef S = Arg->getValue();
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if (S == "auto")
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return ErrorOS->has_colors();
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if (S == "always")
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return true;
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if (S != "never")
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error("unknown option: -color-diagnostics=" + S);
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return false;
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}
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static cl::TokenizerCallback getQuotingStyle(opt::InputArgList &Args) {
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if (auto *Arg = Args.getLastArg(OPT_rsp_quoting)) {
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StringRef S = Arg->getValue();
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if (S != "windows" && S != "posix")
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error("invalid response file quoting: " + S);
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if (S == "windows")
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return cl::TokenizeWindowsCommandLine;
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return cl::TokenizeGNUCommandLine;
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}
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if (Triple(sys::getProcessTriple()).getOS() == Triple::Win32)
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return cl::TokenizeWindowsCommandLine;
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return cl::TokenizeGNUCommandLine;
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}
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// Parses a given list of options.
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opt::InputArgList ELFOptTable::parse(ArrayRef<const char *> Argv) {
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// Make InputArgList from string vectors.
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unsigned MissingIndex;
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unsigned MissingCount;
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SmallVector<const char *, 256> Vec(Argv.data(), Argv.data() + Argv.size());
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// We need to get the quoting style for response files before parsing all
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// options so we parse here before and ignore all the options but
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// --rsp-quoting.
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opt::InputArgList Args = this->ParseArgs(Vec, MissingIndex, MissingCount);
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// Expand response files (arguments in the form of @<filename>)
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// and then parse the argument again.
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cl::ExpandResponseFiles(Saver, getQuotingStyle(Args), Vec);
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Args = this->ParseArgs(Vec, MissingIndex, MissingCount);
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// Interpret -color-diagnostics early so that error messages
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// for unknown flags are colored.
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Config->ColorDiagnostics = getColorDiagnostics(Args);
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if (MissingCount)
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error(Twine(Args.getArgString(MissingIndex)) + ": missing argument");
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for (auto *Arg : Args.filtered(OPT_UNKNOWN))
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error("unknown argument: " + Arg->getSpelling());
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return Args;
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}
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void elf::printHelp(const char *Argv0) {
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ELFOptTable Table;
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Table.PrintHelp(outs(), Argv0, "lld", false);
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outs() << "\n";
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// Scripts generated by Libtool versions up to at least 2.4.6 (the most
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// recent version as of March 2017) expect /: supported targets:.* elf/
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// in a message for the -help option. If it doesn't match, the scripts
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// assume that the linker doesn't support very basic features such as
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// shared libraries. Therefore, we need to print out at least "elf".
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// Here, we print out all the targets that we support.
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outs() << Argv0 << ": supported targets: "
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<< "elf32-i386 elf32-iamcu elf32-littlearm elf32-ntradbigmips "
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<< "elf32-ntradlittlemips elf32-powerpc elf32-tradbigmips "
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<< "elf32-tradlittlemips elf32-x86-64 "
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<< "elf64-amdgpu elf64-littleaarch64 elf64-powerpc elf64-tradbigmips "
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<< "elf64-tradlittlemips elf64-x86-64\n";
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}
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// Reconstructs command line arguments so that so that you can re-run
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// the same command with the same inputs. This is for --reproduce.
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std::string elf::createResponseFile(const opt::InputArgList &Args) {
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SmallString<0> Data;
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raw_svector_ostream OS(Data);
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// Copy the command line to the output while rewriting paths.
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for (auto *Arg : Args) {
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switch (Arg->getOption().getID()) {
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case OPT_reproduce:
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break;
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case OPT_INPUT:
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OS << quote(rewritePath(Arg->getValue())) << "\n";
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break;
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case OPT_o:
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// If -o path contains directories, "lld @response.txt" will likely
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// fail because the archive we are creating doesn't contain empty
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// directories for the output path (-o doesn't create directories).
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// Strip directories to prevent the issue.
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OS << "-o " << quote(sys::path::filename(Arg->getValue())) << "\n";
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break;
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case OPT_L:
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case OPT_dynamic_list:
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case OPT_rpath:
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case OPT_alias_script_T:
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case OPT_script:
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case OPT_version_script:
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OS << Arg->getSpelling() << " " << quote(rewritePath(Arg->getValue()))
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<< "\n";
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break;
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default:
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OS << toString(Arg) << "\n";
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}
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}
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return Data.str();
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}
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// Find a file by concatenating given paths. If a resulting path
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// starts with "=", the character is replaced with a --sysroot value.
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static Optional<std::string> findFile(StringRef Path1, const Twine &Path2) {
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SmallString<128> S;
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if (Path1.startswith("="))
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path::append(S, Config->Sysroot, Path1.substr(1), Path2);
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else
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path::append(S, Path1, Path2);
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if (fs::exists(S))
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return S.str().str();
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return None;
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}
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Optional<std::string> elf::findFromSearchPaths(StringRef Path) {
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for (StringRef Dir : Config->SearchPaths)
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if (Optional<std::string> S = findFile(Dir, Path))
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return S;
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return None;
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}
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// This is for -lfoo. We'll look for libfoo.so or libfoo.a from
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// search paths.
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Optional<std::string> elf::searchLibrary(StringRef Name) {
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if (Name.startswith(":"))
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return findFromSearchPaths(Name.substr(1));
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for (StringRef Dir : Config->SearchPaths) {
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if (!Config->Static)
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if (Optional<std::string> S = findFile(Dir, "lib" + Name + ".so"))
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return S;
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if (Optional<std::string> S = findFile(Dir, "lib" + Name + ".a"))
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return S;
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}
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return None;
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}
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