C++ Triple::getTriple方法代码示例

OptionSet<SanitizerKind> swift::parseSanitizerArgValues(
    const llvm::opt::ArgList &Args,
    const llvm::opt::Arg *A,
    const llvm::Triple &Triple,
    DiagnosticEngine &Diags,
    llvm::function_ref<bool(llvm::StringRef)> sanitizerRuntimeLibExists) {
  OptionSet<SanitizerKind> sanitizerSet;

  // Find the sanitizer kind.
  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
    StringRef opt = A->getValue(i);
    if (opt == "address") {
      sanitizerSet |= SanitizerKind::Address;
    } else if (opt == "thread") {
      sanitizerSet |= SanitizerKind::Thread;
    } else if (opt == "fuzzer") {
      sanitizerSet |= SanitizerKind::Fuzzer;
    } else {
      Diags.diagnose(SourceLoc(), diag::error_unsupported_option_argument,
          A->getOption().getPrefixedName(), A->getValue(i));
    }
  }

  // Sanitizers are only supported on Linux or Darwin.
  if (!(Triple.isOSDarwin() || Triple.isOSLinux())) {
    SmallString<128> b;
    Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
      (A->getOption().getPrefixedName() +
          StringRef(A->getAsString(Args))).toStringRef(b),
      Triple.getTriple());
  }

  // Address and thread sanitizers can not be enabled concurrently.
  if ((sanitizerSet & SanitizerKind::Thread)
        && (sanitizerSet & SanitizerKind::Address)) {
    SmallString<128> b1;
    SmallString<128> b2;
    Diags.diagnose(SourceLoc(), diag::error_argument_not_allowed_with,
        (A->getOption().getPrefixedName()
            + toStringRef(SanitizerKind::Address)).toStringRef(b1),
        (A->getOption().getPrefixedName()
            + toStringRef(SanitizerKind::Thread)).toStringRef(b2));
  }

  // Thread Sanitizer only works on OS X and the simulators. It's only supported
  // on 64 bit architectures.
  if ((sanitizerSet & SanitizerKind::Thread) &&
      !isTSanSupported(Triple, sanitizerRuntimeLibExists)) {
    SmallString<128> b;
    Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
      (A->getOption().getPrefixedName()
          + toStringRef(SanitizerKind::Thread)).toStringRef(b),
      Triple.getTriple());
  }

  return sanitizerSet;
}

SanitizerKind swift::parseSanitizerArgValues(const llvm::opt::Arg *A,
                                      const llvm::Triple &Triple,
                                      DiagnosticEngine &Diags) {
  SanitizerKind kind = SanitizerKind::None;

  // Find the sanitizer kind.
  SanitizerKind pKind = SanitizerKind::None;
  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
    kind =
    llvm::StringSwitch<SanitizerKind>(A->getValue(i))
      .Case("address", SanitizerKind::Address)
      .Case("thread", SanitizerKind::Thread)
      .Default(SanitizerKind::None);

    if (kind == SanitizerKind::None) {
      Diags.diagnose(SourceLoc(), diag::error_unsupported_option_argument,
        A->getOption().getPrefixedName(), A->getValue(i));
      return kind;
    }

    // Currently, more than one sanitizer cannot be enabled at the same time.
    if (pKind != SanitizerKind::None && pKind != kind) {
      SmallString<128> pb;
      SmallString<128> b;
      Diags.diagnose(SourceLoc(), diag::error_argument_not_allowed_with,
        (A->getOption().getPrefixedName() + toStringRef(pKind)).toStringRef(pb),
        (A->getOption().getPrefixedName() + toStringRef(kind)).toStringRef(b));
    }
    pKind = kind;
  }

  if (kind == SanitizerKind::None)
    return kind;

  // Check if the target is supported for this sanitizer.
  // None of the sanitizers work on Linux right now.
  if (!Triple.isOSDarwin()) {
    SmallString<128> b;
    Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
      (A->getOption().getPrefixedName() + toStringRef(kind)).toStringRef(b),
      Triple.getTriple());
  }
  // Thread Sanitizer only works on OS X and the simulators. It's only supported
  // on 64 bit architectures.
  if (kind == SanitizerKind::Thread &&
      (!(Triple.isMacOSX() || tripleIsAnySimulator(Triple)) ||
       !Triple.isArch64Bit())) {
    SmallString<128> b;
    Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
      (A->getOption().getPrefixedName() + toStringRef(kind)).toStringRef(b),
      Triple.getTriple());
  }

  return kind;
}

    context()
        : context_base()
        , tmp_buffer()
        , triple(llvm::sys::getDefaultTargetTriple())
        , target(llvm::TargetRegistry::lookupTarget(triple.getTriple(), tmp_buffer))
        , options()
        , target_machine(target->createTargetMachine(triple.getTriple(), ""/*cpu name*/, ""/*feature*/, options))
        , data_layout(target_machine->getDataLayout())
        , llvm_context(llvm::getGlobalContext())
        , builder(llvm_context)
    {
        if (!target) {
            throw code_generation_error{"LLVM IR generator", boost::format("On looking up target with '%1%': %2%") % triple.getTriple() % tmp_buffer};
        }

        if (!target_machine) {
            throw code_generation_error{"LLVM IR generator", boost::format("Failed to get a target machine for %1%") % triple.getTriple()};
        }

        assert(target);
        assert(target_machine);
        assert(data_layout);
    }

void InitHeaderSearch::
AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) {
  llvm::Triple::OSType os = triple.getOS();
  // FIXME: temporary hack: hard-coded paths.

  if (triple.isOSDarwin()) {
    switch (triple.getArch()) {
    default: break;

    case llvm::Triple::ppc:
    case llvm::Triple::ppc64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "powerpc-apple-darwin10", "", "ppc64",
                                  triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
                                  "powerpc-apple-darwin10", "", "ppc64",
                                  triple);
      break;

    case llvm::Triple::x86:
    case llvm::Triple::x86_64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "i686-apple-darwin10", "", "x86_64", triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
                                  "i686-apple-darwin8", "", "", triple);
      break;

    case llvm::Triple::arm:
    case llvm::Triple::thumb:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm-apple-darwin10", "v7", "", triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm-apple-darwin10", "v6", "", triple);
      break;

    case llvm::Triple::aarch64:
    case llvm::Triple::arm64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm64-apple-darwin10", "", "", triple);
      break;
    }
    return;
  }

  switch (os) {
  case llvm::Triple::Linux:
    llvm_unreachable("Include management is handled in the driver.");

  case llvm::Triple::Win32:
    switch (triple.getEnvironment()) {
    default: llvm_unreachable("Include management is handled in the driver.");
    case llvm::Triple::Cygnus:
      // Cygwin-1.7
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3");
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
      // g++-4 / Cygwin-1.5
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
      break;
    case llvm::Triple::GNU:
      // mingw-w64 C++ include paths (i686-w64-mingw32 and x86_64-w64-mingw32)
      AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.0");
      AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.1");
      AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.2");
      AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.3");
      AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.8.0");
      AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.8.1");
      AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.8.2");
      // mingw.org C++ include paths
#if defined(LLVM_ON_WIN32)
      AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.0");
      AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.1");
      AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.2");
      AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.3");
      AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.0");
      AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.1");
      AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.2");
#endif
      break;
    }
  case llvm::Triple::DragonFly:
    if (llvm::sys::fs::exists("/usr/lib/gcc47"))
      AddPath("/usr/include/c++/4.7", CXXSystem, false);
    else
      AddPath("/usr/include/c++/4.4", CXXSystem, false);
    break;
  case llvm::Triple::OpenBSD: {
    std::string t = triple.getTriple();
    if (t.substr(0, 6) == "x86_64")
      t.replace(0, 6, "amd64");
    AddGnuCPlusPlusIncludePaths("/usr/include/g++",
                                t, "", "", triple);
    break;
  }
  case llvm::Triple::Minix:
    AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
                                "", "", "", triple);
    break;
  case llvm::Triple::Solaris:
    AddGnuCPlusPlusIncludePaths("/usr/gcc/4.5/include/c++/4.5.2/",
//.........这里部分代码省略.........

void InitHeaderSearch::
AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) {
  llvm::Triple::OSType os = triple.getOS();
  // FIXME: temporary hack: hard-coded paths.

  if (triple.isOSDarwin()) {
    switch (triple.getArch()) {
    default: break;

    case llvm::Triple::ppc:
    case llvm::Triple::ppc64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "powerpc-apple-darwin10", "", "ppc64",
                                  triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
                                  "powerpc-apple-darwin10", "", "ppc64",
                                  triple);
      break;

    case llvm::Triple::x86:
    case llvm::Triple::x86_64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "i686-apple-darwin10", "", "x86_64", triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
                                  "i686-apple-darwin8", "", "", triple);
      break;

    case llvm::Triple::arm:
    case llvm::Triple::thumb:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm-apple-darwin10", "v7", "", triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm-apple-darwin10", "v6", "", triple);
      break;

    case llvm::Triple::aarch64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm64-apple-darwin10", "", "", triple);
      break;
    }
    return;
  }

  switch (os) {
  case llvm::Triple::Linux:
  case llvm::Triple::Solaris:
    llvm_unreachable("Include management is handled in the driver.");
    break;
  case llvm::Triple::Win32:
    switch (triple.getEnvironment()) {
    default: llvm_unreachable("Include management is handled in the driver.");
    case llvm::Triple::Cygnus:
      // Cygwin-1.7
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3");
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
      // g++-4 / Cygwin-1.5
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
      break;
    }
    break;
  case llvm::Triple::DragonFly:
    AddPath("/usr/include/c++/5.0", CXXSystem, false);
    break;
  case llvm::Triple::OpenBSD: {
    std::string t = triple.getTriple();
    if (t.substr(0, 6) == "x86_64")
      t.replace(0, 6, "amd64");
    AddGnuCPlusPlusIncludePaths("/usr/include/g++",
                                t, "", "", triple);
    break;
  }
  case llvm::Triple::Minix:
    AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
                                "", "", "", triple);
    break;
  default:
    break;
  }
}

//.........这里部分代码省略.........

    // Gentoo x86 gcc 4.5.2
    AddGnuCPlusPlusIncludePaths(
      "/usr/lib/gcc/i686-pc-linux-gnu/4.5.2/include/g++-v4",
      "i686-pc-linux-gnu", "", "", triple);
    // Gentoo x86 gcc 4.4.5
    AddGnuCPlusPlusIncludePaths(
      "/usr/lib/gcc/i686-pc-linux-gnu/4.4.5/include/g++-v4",
      "i686-pc-linux-gnu", "", "", triple);
    // Gentoo x86 gcc 4.4.4
    AddGnuCPlusPlusIncludePaths(
      "/usr/lib/gcc/i686-pc-linux-gnu/4.4.4/include/g++-v4",
      "i686-pc-linux-gnu", "", "", triple);
   // Gentoo x86 2010.0 stable
    AddGnuCPlusPlusIncludePaths(
      "/usr/lib/gcc/i686-pc-linux-gnu/4.4.3/include/g++-v4",
      "i686-pc-linux-gnu", "", "", triple);
    // Gentoo x86 2009.1 stable
    AddGnuCPlusPlusIncludePaths(
      "/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4",
      "i686-pc-linux-gnu", "", "", triple);
    // Gentoo x86 2009.0 stable
    AddGnuCPlusPlusIncludePaths(
      "/usr/lib/gcc/i686-pc-linux-gnu/4.3.2/include/g++-v4",
      "i686-pc-linux-gnu", "", "", triple);
    // Gentoo x86 2008.0 stable
    AddGnuCPlusPlusIncludePaths(
      "/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/include/g++-v4",
      "i686-pc-linux-gnu", "", "", triple);
    // Gentoo x86 llvm-gcc trunk
    AddGnuCPlusPlusIncludePaths(
        "/usr/lib/llvm-gcc-4.2-9999/include/c++/4.2.1",
        "i686-pc-linux-gnu", "", "", triple);

    // Gentoo amd64 gcc 4.5.2
    AddGnuCPlusPlusIncludePaths(
        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/include/g++-v4",
        "x86_64-pc-linux-gnu", "32", "", triple);
    // Gentoo amd64 gcc 4.4.5
    AddGnuCPlusPlusIncludePaths(
        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.5/include/g++-v4",
        "x86_64-pc-linux-gnu", "32", "", triple);
    // Gentoo amd64 gcc 4.4.4
    AddGnuCPlusPlusIncludePaths(
        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.4/include/g++-v4",
        "x86_64-pc-linux-gnu", "32", "", triple);
    // Gentoo amd64 gcc 4.4.3
    AddGnuCPlusPlusIncludePaths(
        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.3/include/g++-v4",
        "x86_64-pc-linux-gnu", "32", "", triple);
    // Gentoo amd64 gcc 4.3.4
    AddGnuCPlusPlusIncludePaths(
        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.4/include/g++-v4",
        "x86_64-pc-linux-gnu", "", "", triple);
    // Gentoo amd64 gcc 4.3.2
    AddGnuCPlusPlusIncludePaths(
        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2/include/g++-v4",
        "x86_64-pc-linux-gnu", "", "", triple);
    // Gentoo amd64 stable
    AddGnuCPlusPlusIncludePaths(
        "/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/include/g++-v4",
        "x86_64-pc-linux-gnu", "", "", triple);

    // Gentoo amd64 llvm-gcc trunk
    AddGnuCPlusPlusIncludePaths(
        "/usr/lib/llvm-gcc-4.2-9999/include/c++/4.2.1",
        "x86_64-pc-linux-gnu", "", "", triple);

    break;
  case llvm::Triple::FreeBSD:
    // FreeBSD 8.0
    // FreeBSD 7.3
    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2", "", "", "", triple);
    break;
  case llvm::Triple::NetBSD:
    AddGnuCPlusPlusIncludePaths("/usr/include/g++", "", "", "", triple);
    break;
  case llvm::Triple::OpenBSD: {
    std::string t = triple.getTriple();
    if (t.substr(0, 6) == "x86_64")
      t.replace(0, 6, "amd64");
    AddGnuCPlusPlusIncludePaths("/usr/include/g++",
                                t, "", "", triple);
    break;
  }
  case llvm::Triple::Minix:
    AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
                                "", "", "", triple);
    break;
  case llvm::Triple::Solaris:
    // Solaris - Fall though..
  case llvm::Triple::AuroraUX:
    // AuroraUX
    AddGnuCPlusPlusIncludePaths("/opt/gcc4/include/c++/4.2.4",
                                "i386-pc-solaris2.11", "", "", triple);
    break;
  default:
    break;
  }
}

OptionSet<SanitizerKind> swift::parseSanitizerArgValues(
    const llvm::opt::ArgList &Args,
    const llvm::opt::Arg *A,
    const llvm::Triple &Triple,
    DiagnosticEngine &Diags,
    llvm::function_ref<bool(llvm::StringRef, bool)> sanitizerRuntimeLibExists) {
  OptionSet<SanitizerKind> sanitizerSet;

  // Find the sanitizer kind.
  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
    auto kind = llvm::StringSwitch<Optional<SanitizerKind>>(A->getValue(i))
        .Case("address", SanitizerKind::Address)
        .Case("thread", SanitizerKind::Thread)
        .Case("fuzzer", SanitizerKind::Fuzzer)
        .Default(None);
    bool isShared = kind && *kind != SanitizerKind::Fuzzer;
    if (!kind) {
      Diags.diagnose(SourceLoc(), diag::error_unsupported_option_argument,
          A->getOption().getPrefixedName(), A->getValue(i));
    } else {
      // Support is determined by existance of the sanitizer library.
      bool sanitizerSupported =
          sanitizerRuntimeLibExists(toFileName(*kind), isShared);

      // TSan is explicitly not supported for 32 bits.
      if (*kind == SanitizerKind::Thread && !Triple.isArch64Bit())
        sanitizerSupported = false;

      if (!sanitizerSupported) {
        SmallString<128> b;
        Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
                       (A->getOption().getPrefixedName() + toStringRef(*kind))
                           .toStringRef(b),
                       Triple.getTriple());
      } else {
        sanitizerSet |= *kind;
      }
    }
  }

  // Check that we're one of the known supported targets for sanitizers.
  if (!(Triple.isOSDarwin() || Triple.isOSLinux() || Triple.isOSWindows())) {
    SmallString<128> b;
    Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
      (A->getOption().getPrefixedName() +
          StringRef(A->getAsString(Args))).toStringRef(b),
      Triple.getTriple());
  }

  // Address and thread sanitizers can not be enabled concurrently.
  if ((sanitizerSet & SanitizerKind::Thread)
        && (sanitizerSet & SanitizerKind::Address)) {
    SmallString<128> b1;
    SmallString<128> b2;
    Diags.diagnose(SourceLoc(), diag::error_argument_not_allowed_with,
        (A->getOption().getPrefixedName()
            + toStringRef(SanitizerKind::Address)).toStringRef(b1),
        (A->getOption().getPrefixedName()
            + toStringRef(SanitizerKind::Thread)).toStringRef(b2));
  }

  return sanitizerSet;
}

void InitHeaderSearch::AddDefaultCPlusPlusIncludePaths(
    const LangOptions &LangOpts, const llvm::Triple &triple,
    const HeaderSearchOptions &HSOpts) {
  llvm::Triple::OSType os = triple.getOS();
  // FIXME: temporary hack: hard-coded paths.

  if (triple.isOSDarwin()) {
    bool IsBaseFound = true;
    switch (triple.getArch()) {
    default: break;

    case llvm::Triple::ppc:
    case llvm::Triple::ppc64:
      IsBaseFound = AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                                "powerpc-apple-darwin10", "",
                                                "ppc64", triple);
      IsBaseFound |= AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
                                                 "powerpc-apple-darwin10", "",
                                                 "ppc64", triple);
      break;

    case llvm::Triple::x86:
    case llvm::Triple::x86_64:
      IsBaseFound = AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                                "i686-apple-darwin10", "",
                                                "x86_64", triple);
      IsBaseFound |= AddGnuCPlusPlusIncludePaths(
          "/usr/include/c++/4.0.0", "i686-apple-darwin8", "", "", triple);
      break;

    case llvm::Triple::arm:
    case llvm::Triple::thumb:
      IsBaseFound = AddGnuCPlusPlusIncludePaths(
          "/usr/include/c++/4.2.1", "arm-apple-darwin10", "v7", "", triple);
      IsBaseFound |= AddGnuCPlusPlusIncludePaths(
          "/usr/include/c++/4.2.1", "arm-apple-darwin10", "v6", "", triple);
      break;

    case llvm::Triple::aarch64:
      IsBaseFound = AddGnuCPlusPlusIncludePaths(
          "/usr/include/c++/4.2.1", "arm64-apple-darwin10", "", "", triple);
      break;
    }
    // Warn when compiling pure C++ / Objective-C++ only.
    if (!IsBaseFound &&
        !(LangOpts.CUDA || LangOpts.OpenCL || LangOpts.RenderScript)) {
      Headers.getDiags().Report(SourceLocation(),
                                diag::warn_stdlibcxx_not_found);
    }
    return;
  }

  switch (os) {
  case llvm::Triple::Linux:
  case llvm::Triple::Hurd:
  case llvm::Triple::Solaris:
    llvm_unreachable("Include management is handled in the driver.");
    break;
  case llvm::Triple::Win32:
    switch (triple.getEnvironment()) {
    default: llvm_unreachable("Include management is handled in the driver.");
    case llvm::Triple::Cygnus:
      // Cygwin-1.7
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3");
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
      // g++-4 / Cygwin-1.5
      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
      break;
    }
    break;
  case llvm::Triple::DragonFly:
    AddPath("/usr/include/c++/5.0", CXXSystem, false);
    break;
  case llvm::Triple::OpenBSD: {
    std::string t = triple.getTriple();
    if (t.substr(0, 6) == "x86_64")
      t.replace(0, 6, "amd64");
    AddGnuCPlusPlusIncludePaths("/usr/include/g++",
                                t, "", "", triple);
    break;
  }
  case llvm::Triple::Minix:
    AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
                                "", "", "", triple);
    break;
  default:
    break;
  }
}