r233594 - Add driver support for Native Client SDK

Rafael EspĂ­ndola rafael.espindola at gmail.com
Tue Mar 31 05:10:57 PDT 2015


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http://lab.llvm.org:8011/builders/clang-x86-win2008-selfhost/builds/189

On 30 March 2015 at 16:31, Derek Schuff <dschuff at google.com> wrote:
> Author: dschuff
> Date: Mon Mar 30 15:31:33 2015
> New Revision: 233594
>
> URL: http://llvm.org/viewvc/llvm-project?rev=233594&view=rev
> Log:
> Add driver support for Native Client SDK
>
> Add Tool and ToolChain support for clang to target the NaCl OS using the NaCl
> SDK for x86-32, x86-64 and ARM.
>
> Includes nacltools::Assemble and Link which are derived from gnutools. They
> are similar to Linux but different enought that they warrant their own class.
> Also includes a NaCl_TC in ToolChains derived from Generic_ELF with library
> and include paths suitable for an SDK and independent of the system tools.
>
> Differential Revision: http://reviews.llvm.org/D8590
>
> Added:
>     cfe/trunk/test/Driver/nacl-direct.c
> Modified:
>     cfe/trunk/lib/Basic/Targets.cpp
>     cfe/trunk/lib/Driver/Driver.cpp
>     cfe/trunk/lib/Driver/ToolChains.cpp
>     cfe/trunk/lib/Driver/ToolChains.h
>     cfe/trunk/lib/Driver/Tools.cpp
>     cfe/trunk/lib/Driver/Tools.h
>     cfe/trunk/lib/Frontend/InitHeaderSearch.cpp
>     cfe/trunk/test/CodeGen/target-data.c
>
> Modified: cfe/trunk/lib/Basic/Targets.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets.cpp?rev=233594&r1=233593&r2=233594&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Basic/Targets.cpp (original)
> +++ cfe/trunk/lib/Basic/Targets.cpp Mon Mar 30 15:31:33 2015
> @@ -713,8 +713,7 @@ public:
>      // RegParmMax is inherited from the underlying architecture
>      this->LongDoubleFormat = &llvm::APFloat::IEEEdouble;
>      if (Triple.getArch() == llvm::Triple::arm) {
> -      this->DescriptionString =
> -          "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S128";
> +      // Handled in ARM's setABI().
>      } else if (Triple.getArch() == llvm::Triple::x86) {
>        this->DescriptionString = "e-m:e-p:32:32-i64:64-n8:16:32-S128";
>      } else if (Triple.getArch() == llvm::Triple::x86_64) {
> @@ -3897,6 +3896,9 @@ class ARMTargetInfo : public TargetInfo
>                            "-a:0:32"
>                            "-n32"
>                            "-S64";
> +    } else if (T.isOSNaCl()) {
> +      assert(!BigEndian && "NaCl on ARM does not support big endian");
> +      DescriptionString = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S128";
>      } else {
>        DescriptionString =
>            BigEndian ? "E-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
>
> Modified: cfe/trunk/lib/Driver/Driver.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Driver.cpp?rev=233594&r1=233593&r2=233594&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Driver/Driver.cpp (original)
> +++ cfe/trunk/lib/Driver/Driver.cpp Mon Mar 30 15:31:33 2015
> @@ -2062,6 +2062,9 @@ const ToolChain &Driver::getToolChain(co
>        else
>          TC = new toolchains::Linux(*this, Target, Args);
>        break;
> +    case llvm::Triple::NaCl:
> +      TC = new toolchains::NaCl_TC(*this, Target, Args);
> +      break;
>      case llvm::Triple::Solaris:
>        TC = new toolchains::Solaris(*this, Target, Args);
>        break;
>
> Modified: cfe/trunk/lib/Driver/ToolChains.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains.cpp?rev=233594&r1=233593&r2=233594&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Driver/ToolChains.cpp (original)
> +++ cfe/trunk/lib/Driver/ToolChains.cpp Mon Mar 30 15:31:33 2015
> @@ -2084,7 +2084,8 @@ void Generic_ELF::addClangTargetOptions(
>        getTriple().getArch() == llvm::Triple::aarch64_be ||
>        (getTriple().getOS() == llvm::Triple::Linux &&
>         (!V.isOlderThan(4, 7, 0) ||
> -        getTriple().getEnvironment() == llvm::Triple::Android));
> +        getTriple().getEnvironment() == llvm::Triple::Android)) ||
> +      getTriple().getOS() == llvm::Triple::NaCl;
>
>    if (DriverArgs.hasFlag(options::OPT_fuse_init_array,
>                           options::OPT_fno_use_init_array,
> @@ -2307,6 +2308,159 @@ StringRef Hexagon_TC::GetTargetCPU(const
>  }
>  // End Hexagon
>
> +/// NaCl Toolchain
> +NaCl_TC::NaCl_TC(const Driver &D, const llvm::Triple &Triple,
> +                 const ArgList &Args)
> +  : Generic_ELF(D, Triple, Args) {
> +
> +  // Remove paths added by Generic_GCC. NaCl Toolchain cannot use the
> +  // default paths, and must instead only use the paths provided
> +  // with this toolchain based on architecture.
> +  path_list& file_paths = getFilePaths();
> +  path_list& prog_paths = getProgramPaths();
> +
> +  file_paths.clear();
> +  prog_paths.clear();
> +
> +  // Path for library files (libc.a, ...)
> +  std::string FilePath(getDriver().Dir + "/../");
> +
> +  // Path for tools (clang, ld, etc..)
> +  std::string ProgPath(getDriver().Dir + "/../");
> +
> +  // Path for toolchain libraries (libgcc.a, ...)
> +  std::string ToolPath(getDriver().ResourceDir + "/lib/");
> +
> +  switch(Triple.getArch()) {
> +    case llvm::Triple::x86: {
> +      file_paths.push_back(FilePath + "x86_64-nacl/lib32");
> +      file_paths.push_back(FilePath + "x86_64-nacl/usr/lib32");
> +      prog_paths.push_back(ProgPath + "x86_64-nacl/bin");
> +      file_paths.push_back(ToolPath + "i686-nacl");
> +      break;
> +    }
> +    case llvm::Triple::x86_64: {
> +      file_paths.push_back(FilePath + "x86_64-nacl/lib");
> +      file_paths.push_back(FilePath + "x86_64-nacl/usr/lib");
> +      prog_paths.push_back(ProgPath + "x86_64-nacl/bin");
> +      file_paths.push_back(ToolPath + "x86_64-nacl");
> +      break;
> +    }
> +    case llvm::Triple::arm: {
> +      file_paths.push_back(FilePath + "arm-nacl/lib");
> +      file_paths.push_back(FilePath + "arm-nacl/usr/lib");
> +      prog_paths.push_back(ProgPath + "arm-nacl/bin");
> +      file_paths.push_back(ToolPath + "arm-nacl");
> +      break;
> +    }
> +    default:
> +      break;
> +  }
> +
> +  // Use provided linker, not system linker
> +  Linker = GetProgramPath("ld");
> +  NaClArmMacrosPath = GetFilePath("nacl-arm-macros.s");
> +}
> +
> +void NaCl_TC::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
> +                                        ArgStringList &CC1Args) const {
> +  const Driver &D = getDriver();
> +  if (DriverArgs.hasArg(options::OPT_nostdinc))
> +    return;
> +
> +  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
> +    SmallString<128> P(D.ResourceDir);
> +    llvm::sys::path::append(P, "include");
> +    addSystemInclude(DriverArgs, CC1Args, P.str());
> +  }
> +
> +  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
> +    return;
> +
> +  SmallString<128> P(D.Dir + "/../");
> +  if (getTriple().getArch() == llvm::Triple::arm) {
> +    llvm::sys::path::append(P, "arm-nacl/usr/include");
> +  } else if (getTriple().getArch() == llvm::Triple::x86) {
> +    llvm::sys::path::append(P, "x86_64-nacl/usr/include");
> +  } else if (getTriple().getArch() == llvm::Triple::x86_64) {
> +    llvm::sys::path::append(P, "x86_64-nacl/usr/include");
> +  } else {
> +    return;
> +  }
> +
> +  addSystemInclude(DriverArgs, CC1Args, P.str());
> +  llvm::sys::path::remove_filename(P);
> +  llvm::sys::path::remove_filename(P);
> +  llvm::sys::path::append(P, "include");
> +  addSystemInclude(DriverArgs, CC1Args, P.str());
> +}
> +
> +void NaCl_TC::AddCXXStdlibLibArgs(const ArgList &Args,
> +                                  ArgStringList &CmdArgs) const {
> +  // Check for -stdlib= flags. We only support libc++ but this consumes the arg
> +  // if the value is libc++, and emits an error for other values.
> +  GetCXXStdlibType(Args);
> +  CmdArgs.push_back("-lc++");
> +}
> +
> +void NaCl_TC::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
> +                                           ArgStringList &CC1Args) const {
> +  const Driver &D = getDriver();
> +  if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
> +      DriverArgs.hasArg(options::OPT_nostdincxx))
> +    return;
> +
> +  // Check for -stdlib= flags. We only support libc++ but this consumes the arg
> +  // if the value is libc++, and emits an error for other values.
> +  GetCXXStdlibType(DriverArgs);
> +
> +  if (getTriple().getArch() == llvm::Triple::arm) {
> +    SmallString<128> P(D.Dir + "/../");
> +    llvm::sys::path::append(P, "arm-nacl/include/c++/v1");
> +    addSystemInclude(DriverArgs, CC1Args, P.str());
> +  } else if (getTriple().getArch() == llvm::Triple::x86) {
> +    SmallString<128> P(D.Dir + "/../");
> +    llvm::sys::path::append(P, "x86_64-nacl/include/c++/v1");
> +    addSystemInclude(DriverArgs, CC1Args, P.str());
> +  } else if (getTriple().getArch() == llvm::Triple::x86_64) {
> +    SmallString<128> P(D.Dir + "/../");
> +    llvm::sys::path::append(P, "x86_64-nacl/include/c++/v1");
> +    addSystemInclude(DriverArgs, CC1Args, P.str());
> +  }
> +}
> +
> +ToolChain::CXXStdlibType NaCl_TC::GetCXXStdlibType(const ArgList &Args) const {
> +  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
> +    StringRef Value = A->getValue();
> +    if (Value == "libc++")
> +      return ToolChain::CST_Libcxx;
> +    getDriver().Diag(diag::err_drv_invalid_stdlib_name)
> +      << A->getAsString(Args);
> +  }
> +
> +  return ToolChain::CST_Libcxx;
> +}
> +
> +std::string NaCl_TC::ComputeEffectiveClangTriple(
> +    const ArgList &Args, types::ID InputType) const {
> +  llvm::Triple TheTriple(ComputeLLVMTriple(Args, InputType));
> +  if (TheTriple.getArch() == llvm::Triple::arm &&
> +      TheTriple.getEnvironment() == llvm::Triple::UnknownEnvironment)
> +    TheTriple.setEnvironment(llvm::Triple::GNUEABIHF);
> +  return TheTriple.getTriple();
> +}
> +
> +Tool *NaCl_TC::buildLinker() const {
> +  return new tools::nacltools::Link(*this);
> +}
> +
> +Tool *NaCl_TC::buildAssembler() const {
> +  if (getTriple().getArch() == llvm::Triple::arm)
> +    return new tools::nacltools::AssembleARM(*this);
> +  return new tools::gnutools::Assemble(*this);
> +}
> +// End NaCl
> +
>  /// TCEToolChain - A tool chain using the llvm bitcode tools to perform
>  /// all subcommands. See http://tce.cs.tut.fi for our peculiar target.
>  /// Currently does not support anything else but compilation.
>
> Modified: cfe/trunk/lib/Driver/ToolChains.h
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains.h?rev=233594&r1=233593&r2=233594&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Driver/ToolChains.h (original)
> +++ cfe/trunk/lib/Driver/ToolChains.h Mon Mar 30 15:31:33 2015
> @@ -717,6 +717,45 @@ public:
>    static StringRef GetTargetCPU(const llvm::opt::ArgList &Args);
>  };
>
> +class LLVM_LIBRARY_VISIBILITY NaCl_TC : public Generic_ELF {
> +public:
> +  NaCl_TC(const Driver &D, const llvm::Triple &Triple,
> +          const llvm::opt::ArgList &Args);
> +
> +  void
> +  AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
> +                            llvm::opt::ArgStringList &CC1Args) const override;
> +  void
> +  AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
> +                               llvm::opt::ArgStringList &CC1Args) const override;
> +
> +  CXXStdlibType
> +  GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
> +
> +  void
> +  AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
> +                      llvm::opt::ArgStringList &CmdArgs) const override;
> +
> +  bool
> +  IsIntegratedAssemblerDefault() const override { return false; }
> +
> +  // Get the path to the file containing NaCl's ARM macros. It lives in NaCl_TC
> +  // because the AssembleARM tool needs a const char * that it can pass around
> +  // and the toolchain outlives all the jobs.
> +  const char *GetNaClArmMacrosPath() const { return NaClArmMacrosPath.c_str(); }
> +
> +  std::string ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args,
> +                                          types::ID InputType) const override;
> +  std::string Linker;
> +
> +protected:
> +  Tool *buildLinker() const override;
> +  Tool *buildAssembler() const override;
> +
> +private:
> +  std::string NaClArmMacrosPath;
> +};
> +
>  /// TCEToolChain - A tool chain using the llvm bitcode tools to perform
>  /// all subcommands. See http://tce.cs.tut.fi for our peculiar target.
>  class LLVM_LIBRARY_VISIBILITY TCEToolChain : public ToolChain {
>
> Modified: cfe/trunk/lib/Driver/Tools.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=233594&r1=233593&r2=233594&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Driver/Tools.cpp (original)
> +++ cfe/trunk/lib/Driver/Tools.cpp Mon Mar 30 15:31:33 2015
> @@ -7911,6 +7911,172 @@ void gnutools::Link::ConstructJob(Compil
>        llvm::make_unique<Command>(JA, *this, ToolChain.Linker.c_str(), CmdArgs));
>  }
>
> +
> +// NaCl ARM assembly (inline or standalone) can be written with a set of macros
> +// for the various SFI requirements like register masking. The assembly tool
> +// inserts the file containing the macros as an input into all the assembly
> +// jobs.
> +void nacltools::AssembleARM::ConstructJob(Compilation &C, const JobAction &JA,
> +                                          const InputInfo &Output,
> +                                          const InputInfoList &Inputs,
> +                                          const ArgList &Args,
> +                                          const char *LinkingOutput) const {
> +  const toolchains::NaCl_TC& ToolChain =
> +    static_cast<const toolchains::NaCl_TC&>(getToolChain());
> +  InputInfo NaClMacros(ToolChain.GetNaClArmMacrosPath(), types::TY_PP_Asm,
> +                       "nacl-arm-macros.s");
> +  InputInfoList NewInputs;
> +  NewInputs.push_back(NaClMacros);
> +  NewInputs.append(Inputs.begin(), Inputs.end());
> +  gnutools::Assemble::ConstructJob(C, JA, Output, NewInputs, Args,
> +                                   LinkingOutput);
> +}
> +
> +
> +// This is quite similar to gnutools::link::ConstructJob with changes that
> +// we use static by default, do not yet support sanitizers or LTO, and a few
> +// others. Eventually we can support more of that and hopefully migrate back
> +// to gnutools::link.
> +void nacltools::Link::ConstructJob(Compilation &C, const JobAction &JA,
> +                                  const InputInfo &Output,
> +                                  const InputInfoList &Inputs,
> +                                  const ArgList &Args,
> +                                  const char *LinkingOutput) const {
> +
> +  const toolchains::NaCl_TC& ToolChain =
> +    static_cast<const toolchains::NaCl_TC&>(getToolChain());
> +  const Driver &D = ToolChain.getDriver();
> +  const bool IsStatic =
> +    !Args.hasArg(options::OPT_dynamic) &&
> +    !Args.hasArg(options::OPT_shared);
> +
> +  ArgStringList CmdArgs;
> +
> +  // Silence warning for "clang -g foo.o -o foo"
> +  Args.ClaimAllArgs(options::OPT_g_Group);
> +  // and "clang -emit-llvm foo.o -o foo"
> +  Args.ClaimAllArgs(options::OPT_emit_llvm);
> +  // and for "clang -w foo.o -o foo". Other warning options are already
> +  // handled somewhere else.
> +  Args.ClaimAllArgs(options::OPT_w);
> +
> +  if (!D.SysRoot.empty())
> +    CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
> +
> +  if (Args.hasArg(options::OPT_rdynamic))
> +    CmdArgs.push_back("-export-dynamic");
> +
> +  if (Args.hasArg(options::OPT_s))
> +    CmdArgs.push_back("-s");
> +
> +  // NaCl_TC doesn't have ExtraOpts like Linux; the only relevant flag from
> +  // there is --build-id, which we do want.
> +  CmdArgs.push_back("--build-id");
> +
> +  if (!IsStatic)
> +    CmdArgs.push_back("--eh-frame-hdr");
> +
> +  CmdArgs.push_back("-m");
> +  if (ToolChain.getArch() == llvm::Triple::x86)
> +    CmdArgs.push_back("elf_i386_nacl");
> +  else if (ToolChain.getArch() == llvm::Triple::arm)
> +    CmdArgs.push_back("armelf_nacl");
> +  else if (ToolChain.getArch() == llvm::Triple::x86_64)
> +    CmdArgs.push_back("elf_x86_64_nacl");
> +  else
> +    D.Diag(diag::err_target_unsupported_arch) << ToolChain.getArchName() <<
> +        "Native Client";
> +
> +
> +  if (IsStatic)
> +    CmdArgs.push_back("-static");
> +  else if (Args.hasArg(options::OPT_shared))
> +    CmdArgs.push_back("-shared");
> +
> +  CmdArgs.push_back("-o");
> +  CmdArgs.push_back(Output.getFilename());
> +  if (!Args.hasArg(options::OPT_nostdlib) &&
> +      !Args.hasArg(options::OPT_nostartfiles)) {
> +    if (!Args.hasArg(options::OPT_shared))
> +      CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt1.o")));
> +    CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
> +
> +    const char *crtbegin;
> +    if (IsStatic)
> +      crtbegin = "crtbeginT.o";
> +    else if (Args.hasArg(options::OPT_shared))
> +      crtbegin = "crtbeginS.o";
> +    else
> +      crtbegin = "crtbegin.o";
> +    CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
> +  }
> +
> +  Args.AddAllArgs(CmdArgs, options::OPT_L);
> +  Args.AddAllArgs(CmdArgs, options::OPT_u);
> +
> +  const ToolChain::path_list &Paths = ToolChain.getFilePaths();
> +
> +  for (const auto &Path : Paths)
> +    CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + Path));
> +
> +  if (Args.hasArg(options::OPT_Z_Xlinker__no_demangle))
> +    CmdArgs.push_back("--no-demangle");
> +
> +  AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs);
> +
> +  if (D.CCCIsCXX() &&
> +      !Args.hasArg(options::OPT_nostdlib) &&
> +      !Args.hasArg(options::OPT_nodefaultlibs)) {
> +    bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
> +      !IsStatic;
> +    if (OnlyLibstdcxxStatic)
> +      CmdArgs.push_back("-Bstatic");
> +    ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
> +    if (OnlyLibstdcxxStatic)
> +      CmdArgs.push_back("-Bdynamic");
> +    CmdArgs.push_back("-lm");
> +  }
> +
> +  if (!Args.hasArg(options::OPT_nostdlib)) {
> +    if (!Args.hasArg(options::OPT_nodefaultlibs)) {
> +      // Always use groups, since it has no effect on dynamic libraries.
> +      CmdArgs.push_back("--start-group");
> +      CmdArgs.push_back("-lc");
> +      // NaCl's libc++ currently requires libpthread, so just always include it
> +      // in the group for C++.
> +      if (Args.hasArg(options::OPT_pthread) ||
> +          Args.hasArg(options::OPT_pthreads) ||
> +          D.CCCIsCXX()) {
> +        CmdArgs.push_back("-lpthread");
> +      }
> +
> +      CmdArgs.push_back("-lgcc");
> +      CmdArgs.push_back("--as-needed");
> +      if (IsStatic)
> +        CmdArgs.push_back("-lgcc_eh");
> +      else
> +        CmdArgs.push_back("-lgcc_s");
> +      CmdArgs.push_back("--no-as-needed");
> +      CmdArgs.push_back("--end-group");
> +    }
> +
> +    if (!Args.hasArg(options::OPT_nostartfiles)) {
> +      const char *crtend;
> +      if (Args.hasArg(options::OPT_shared))
> +        crtend = "crtendS.o";
> +      else
> +        crtend = "crtend.o";
> +
> +      CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
> +      CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
> +    }
> +  }
> +
> +  C.addCommand(llvm::make_unique<Command>(JA, *this,
> +                                          ToolChain.Linker.c_str(), CmdArgs));
> +}
> +
> +
>  void minix::Assemble::ConstructJob(Compilation &C, const JobAction &JA,
>                                     const InputInfo &Output,
>                                     const InputInfoList &Inputs,
>
> Modified: cfe/trunk/lib/Driver/Tools.h
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.h?rev=233594&r1=233593&r2=233594&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Driver/Tools.h (original)
> +++ cfe/trunk/lib/Driver/Tools.h Mon Mar 30 15:31:33 2015
> @@ -507,6 +507,33 @@ namespace gnutools {
>                        const char *LinkingOutput) const override;
>    };
>  }
> +
> +namespace nacltools {
> +  class LLVM_LIBRARY_VISIBILITY AssembleARM : public gnutools::Assemble  {
> +  public:
> +    AssembleARM(const ToolChain &TC) : gnutools::Assemble(TC) {}
> +
> +    void ConstructJob(Compilation &C, const JobAction &JA,
> +                      const InputInfo &Output,
> +                      const InputInfoList &Inputs,
> +                      const llvm::opt::ArgList &TCArgs,
> +                      const char *LinkingOutput) const override;
> +  };
> +  class LLVM_LIBRARY_VISIBILITY Link : public Tool  {
> +  public:
> +    Link(const ToolChain &TC) : Tool("NaCl::Link", "linker", TC) {}
> +
> +    bool hasIntegratedCPP() const override { return false; }
> +    bool isLinkJob() const override { return true; }
> +
> +    void ConstructJob(Compilation &C, const JobAction &JA,
> +                              const InputInfo &Output,
> +                              const InputInfoList &Inputs,
> +                              const llvm::opt::ArgList &TCArgs,
> +                              const char *LinkingOutput) const override;
> +  };
> +}
> +
>    /// minix -- Directly call GNU Binutils assembler and linker
>  namespace minix {
>    class LLVM_LIBRARY_VISIBILITY Assemble : public GnuTool  {
>
> Modified: cfe/trunk/lib/Frontend/InitHeaderSearch.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/InitHeaderSearch.cpp?rev=233594&r1=233593&r2=233594&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Frontend/InitHeaderSearch.cpp (original)
> +++ cfe/trunk/lib/Frontend/InitHeaderSearch.cpp Mon Mar 30 15:31:33 2015
> @@ -232,6 +232,7 @@ void InitHeaderSearch::AddDefaultCInclud
>      case llvm::Triple::NetBSD:
>      case llvm::Triple::OpenBSD:
>      case llvm::Triple::Bitrig:
> +    case llvm::Triple::NaCl:
>        break;
>      default:
>        // FIXME: temporary hack: hard-coded paths.
> @@ -352,6 +353,7 @@ void InitHeaderSearch::AddDefaultCInclud
>    switch (os) {
>    case llvm::Triple::CloudABI:
>    case llvm::Triple::RTEMS:
> +  case llvm::Triple::NaCl:
>      break;
>    default:
>      AddPath("/usr/include", ExternCSystem, false);
>
> Modified: cfe/trunk/test/CodeGen/target-data.c
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/target-data.c?rev=233594&r1=233593&r2=233594&view=diff
> ==============================================================================
> --- cfe/trunk/test/CodeGen/target-data.c (original)
> +++ cfe/trunk/test/CodeGen/target-data.c Mon Mar 30 15:31:33 2015
> @@ -66,7 +66,7 @@
>  // RUN: FileCheck %s -check-prefix=X86_64-NACL
>  // X86_64-NACL: target datalayout = "e-m:e-p:32:32-i64:64-n8:16:32:64-S128"
>
> -// RUN: %clang_cc1 -triple arm-nacl-gnueabi -o - -emit-llvm %s | \
> +// RUN: %clang_cc1 -triple arm-nacl -o - -emit-llvm %s | \
>  // RUN: FileCheck %s -check-prefix=ARM-NACL
>  // ARM-NACL: target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S128"
>
>
> Added: cfe/trunk/test/Driver/nacl-direct.c
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/nacl-direct.c?rev=233594&view=auto
> ==============================================================================
> --- cfe/trunk/test/Driver/nacl-direct.c (added)
> +++ cfe/trunk/test/Driver/nacl-direct.c Mon Mar 30 15:31:33 2015
> @@ -0,0 +1,108 @@
> +// Test clang changes for NaCl Support including:
> +//    include paths, library paths, emulation, default static
> +//
> +// RUN: %clang -### -o %t.o %s 2>&1 \
> +// RUN:     -target i686-unknown-nacl \
> +// RUN:   | FileCheck --check-prefix=CHECK-I686 %s
> +// CHECK-I686: {{.*}}clang{{.*}}" "-cc1"
> +// CHECK-I686: "-fuse-init-array"
> +// CHECK-I686: "-target-cpu" "pentium4"
> +// CHECK-I686: "-resource-dir" "{{.*}}/lib/clang/[[VER:[0-9.]+]]"
> +// CHECK-I686: "-internal-isystem" "{{.*}}/../lib/clang/[[VER]]/include"
> +// CHECK-I686: "-internal-isystem" "{{.*}}/../x86_64-nacl/usr/include"
> +// CHECK-I686: "-internal-isystem" "{{.*}}/../x86_64-nacl/include"
> +// CHECK-I686: /as" "--32"
> +// CHECK-I686: /ld"
> +// CHECK-I686: "--build-id"
> +// CHECK-I686: "-m" "elf_i386_nacl"
> +// CHECK-I686: "-static"
> +// CHECK-I686: "-L{{.*}}/../x86_64-nacl/lib32"
> +// CHECK-I686: "-L{{.*}}/../x86_64-nacl/usr/lib32"
> +// CHECK-I686: "-L{{.*}}/../lib/clang/[[VER]]/lib/i686-nacl"
> +// CHECK-I686-NOT: -lpthread
> +//
> +// RUN: %clang -### -o %t.o %s 2>&1 \
> +// RUN:     -target x86_64-unknown-nacl \
> +// RUN:   | FileCheck --check-prefix=CHECK-x86_64 %s
> +// CHECK-x86_64: {{.*}}clang{{.*}}" "-cc1"
> +// CHECK-x86_64: "-fuse-init-array"
> +// CHECK-x86_64: "-target-cpu" "x86-64"
> +// CHECK-x86_64: "-resource-dir" "{{.*}}/lib/clang/[[VER:[0-9.]+]]"
> +// CHECK-x86_64: "-internal-isystem" "{{.*}}/../lib/clang/[[VER]]/include"
> +// CHECK-x86_64: "-internal-isystem" "{{.*}}/../x86_64-nacl/usr/include"
> +// CHECK-x86_64: "-internal-isystem" "{{.*}}/../x86_64-nacl/include"
> +// CHECK-x86_64: /as" "--64"
> +// CHECK-x86_64: /ld"
> +// CHECK-x86_64: "--build-id"
> +// CHECK-x86_64: "-m" "elf_x86_64_nacl"
> +// CHECK-x86_64: "-static"
> +// CHECK-x86_64: "-L{{.*}}/../x86_64-nacl/lib"
> +// CHECK-x86_64: "-L{{.*}}/../x86_64-nacl/usr/lib"
> +// CHECK-x86_64: "-L{{.*}}/../lib/clang/[[VER]]/lib/x86_64-nacl"
> +// CHECK-X86_64-NOT: -lpthread
> +//
> +// RUN: %clang -### -o %t.o %s 2>&1 \
> +// RUN:     -target armv7a-unknown-nacl-gnueabihf \
> +// RUN:   | FileCheck --check-prefix=CHECK-ARM %s
> +// CHECK-ARM: {{.*}}clang{{.*}}" "-cc1"
> +// CHECK-ARM: "-fuse-init-array"
> +// CHECK-ARM: "-target-cpu" "cortex-a8"
> +// CHECK-ARM: "-target-abi" "aapcs-linux"
> +// CHECK-ARM: "-mfloat-abi" "hard"
> +// CHECK-ARM: "-resource-dir" "{{.*}}/lib/clang/[[VER:[0-9.]+]]"
> +// CHECK-ARM: "-internal-isystem" "{{.*}}/../lib/clang/[[VER]]/include"
> +// CHECK-ARM: "-internal-isystem" "{{.*}}/../arm-nacl/usr/include"
> +// CHECK-ARM: "-internal-isystem" "{{.*}}/../arm-nacl/include"
> +// CHECK-ARM: /as"
> +// CHECK-ARM: /ld"
> +// CHECK-ARM: "--build-id"
> +// CHECK-ARM: "-m" "armelf_nacl"
> +// CHECK-ARM: "-static"
> +// CHECK-ARM: "-L{{.*}}/../arm-nacl/lib"
> +// CHECK-ARM: "-L{{.*}}/../arm-nacl/usr/lib"
> +// CHECK-ARM: "-L{{.*}}/../lib/clang/[[VER]]/lib/arm-nacl"
> +// CHECK-ARM-NOT: -lpthread
> +
> +// Check that even when the target arch is just "arm" (as will be the case when
> +// it is inferred from the binary name) that we get the right ABI flags
> +// RUN: %clang -### -o %t.o %s 2>&1 \
> +// RUN:     -target arm-nacl \
> +// RUN:   | FileCheck --check-prefix=CHECK-ARM-NOV7 %s
> +// CHECK-ARM-NOV7: "-triple" "armv7--nacl-gnueabihf"
> +// CHECK-ARM-NOV7: "-target-abi" "aapcs-linux"
> +// CHECK-ARM-NOV7: "-mfloat-abi" "hard"
> +
> +// Test clang c++ include dirs and link line when using clang++
> +
> +// RUN: %clangxx -### -o %t.o %s 2>&1 \
> +// RUN:     -target armv7a-unknown-nacl-gnueabihf \
> +// RUN:   | FileCheck --check-prefix=CHECK-ARM-CXX %s
> +// CHECK-ARM-CXX: {{.*}}clang{{.*}}" "-cc1"
> +// CHECK-ARM-CXX: "-resource-dir" "{{.*}}/lib/clang/[[VER:[0-9.]+]]"
> +// CHECK-ARM-CXX: "-internal-isystem" "{{.*}}/../arm-nacl/include/c++/v1"
> +// CHECK-ARM-CXX: "-internal-isystem" "{{.*}}/../lib/clang/[[VER]]/include"
> +// CHECK-ARM-CXX: "-internal-isystem" "{{.*}}/../arm-nacl/usr/include"
> +// CHECK-ARM-CXX: "-internal-isystem" "{{.*}}/../arm-nacl/include"
> +// CHECK-ARM-CXX: "-lpthread"
> +
> +// RUN: %clangxx -### -o %t.o %s 2>&1 \
> +// RUN:     -target i686-unknown-nacl \
> +// RUN:   | FileCheck --check-prefix=CHECK-I686-CXX %s
> +// CHECK-I686-CXX: {{.*}}clang{{.*}}" "-cc1"
> +// CHECK-I686-CXX: "-resource-dir" "{{.*}}/lib/clang/[[VER:[0-9.]+]]"
> +// CHECK-I686-CXX: "-internal-isystem" "{{.*}}/../x86_64-nacl/include/c++/v1"
> +// CHECK-I686-CXX: "-internal-isystem" "{{.*}}/../lib/clang/[[VER]]/include"
> +// CHECK-I686-CXX: "-internal-isystem" "{{.*}}/../x86_64-nacl/usr/include"
> +// CHECK-I686-CXX: "-internal-isystem" "{{.*}}/../x86_64-nacl/include"
> +// CHECK-I686-CXX: "-lpthread"
> +
> +// RUN: %clangxx -### -o %t.o %s 2>&1 \
> +// RUN:     -target x86_64-unknown-nacl \
> +// RUN:   | FileCheck --check-prefix=CHECK-x86_64-CXX %s
> +// CHECK-x86_64-CXX: {{.*}}clang{{.*}}" "-cc1"
> +// CHECK-x86_64-CXX: "-resource-dir" "{{.*}}/lib/clang/[[VER:[0-9.]+]]"
> +// CHECK-x86_64-CXX: "-internal-isystem" "{{.*}}/../x86_64-nacl/include/c++/v1"
> +// CHECK-x86_64-CXX: "-internal-isystem" "{{.*}}/../lib/clang/[[VER]]/include"
> +// CHECK-x86_64-CXX: "-internal-isystem" "{{.*}}/../x86_64-nacl/usr/include"
> +// CHECK-x86_64-CXX: "-internal-isystem" "{{.*}}/../x86_64-nacl/include"
> +// CHECK-x86_64-CXX: "-lpthread"
>
>
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