C++ MacroBuilder类代码示例

static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
                       MacroBuilder &Builder) {
  Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
}

static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty,
                            const TargetInfo &TI, MacroBuilder &Builder) {
  Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty)));
}

/// AddImplicitInclude - Add an implicit \#include of the specified file to the
/// predefines buffer.
static void AddImplicitInclude(MacroBuilder &Builder, StringRef File,
                               FileManager &FileMgr) {
  Builder.append(Twine("#include \"") +
                 HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\"");
}

static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix,
                              const llvm::fltSemantics *Sem, StringRef Ext) {
  const char *DenormMin, *Epsilon, *Max, *Min;
  DenormMin = PickFP(Sem, "5.9604644775390625e-8", "1.40129846e-45",
                     "4.9406564584124654e-324", "3.64519953188247460253e-4951",
                     "4.94065645841246544176568792868221e-324",
                     "6.47517511943802511092443895822764655e-4966");
  int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33);
  int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36);
  Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7",
                   "2.2204460492503131e-16", "1.08420217248550443401e-19",
                   "4.94065645841246544176568792868221e-324",
                   "1.92592994438723585305597794258492732e-34");
  int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113);
  int Min10Exp = PickFP(Sem, -13, -37, -307, -4931, -291, -4931);
  int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932);
  int MinExp = PickFP(Sem, -14, -125, -1021, -16381, -968, -16381);
  int MaxExp = PickFP(Sem, 15, 128, 1024, 16384, 1024, 16384);
  Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308",
               "3.36210314311209350626e-4932",
               "2.00416836000897277799610805135016e-292",
               "3.36210314311209350626267781732175260e-4932");
  Max = PickFP(Sem, "6.5504e+4", "3.40282347e+38", "1.7976931348623157e+308",
               "1.18973149535723176502e+4932",
               "1.79769313486231580793728971405301e+308",
               "1.18973149535723176508575932662800702e+4932");

  SmallString<32> DefPrefix;
  DefPrefix = "__";
  DefPrefix += Prefix;
  DefPrefix += "_";

  Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext);
  Builder.defineMacro(DefPrefix + "HAS_DENORM__");
  Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits));
  Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits));
  Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext);
  Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
  Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
  Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits));

  Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp));
  Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp));
  Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext);

  Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")");
  Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")");
  Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext);
}

static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
                             const TargetInfo &TI, MacroBuilder &Builder) {
  Builder.defineMacro(MacroName,
                      Twine(BitWidth / TI.getCharWidth()));
}

static void InitializePredefinedMacros(const TargetInfo &TI,
                                       const LangOptions &LangOpts,
                                       const FrontendOptions &FEOpts,
                                       MacroBuilder &Builder) {
  // Compiler version introspection macros.
  Builder.defineMacro("__llvm__");  // LLVM Backend
  Builder.defineMacro("__clang__"); // Clang Frontend
#define TOSTR2(X) #X
#define TOSTR(X) TOSTR2(X)
  Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
  Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
#ifdef CLANG_VERSION_PATCHLEVEL
  Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
#else
  Builder.defineMacro("__clang_patchlevel__", "0");
#endif
  Builder.defineMacro("__clang_version__", 
                      "\"" CLANG_VERSION_STRING " "
                      + getClangFullRepositoryVersion() + "\"");
#undef TOSTR
#undef TOSTR2
  if (!LangOpts.MicrosoftMode) {
    // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're
    // not compiling for MSVC compatibility
    Builder.defineMacro("__GNUC_MINOR__", "2");
    Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
    Builder.defineMacro("__GNUC__", "4");
    Builder.defineMacro("__GXX_ABI_VERSION", "1002");
  }

  // Define macros for the C11 / C++11 memory orderings
  Builder.defineMacro("__ATOMIC_RELAXED", "0");
  Builder.defineMacro("__ATOMIC_CONSUME", "1");
  Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
  Builder.defineMacro("__ATOMIC_RELEASE", "3");
  Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
  Builder.defineMacro("__ATOMIC_SEQ_CST", "5");

  // Support for #pragma redefine_extname (Sun compatibility)
  Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");

  // As sad as it is, enough software depends on the __VERSION__ for version
  // checks that it is necessary to report 4.2.1 (the base GCC version we claim
  // compatibility with) first.
  Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 
                      Twine(getClangFullCPPVersion()) + "\"");

  // Initialize language-specific preprocessor defines.

  // Standard conforming mode?
  if (!LangOpts.GNUMode)
    Builder.defineMacro("__STRICT_ANSI__");

  if (LangOpts.CPlusPlus11)
    Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");

  if (LangOpts.ObjC1) {
    if (LangOpts.ObjCRuntime.isNonFragile()) {
      Builder.defineMacro("__OBJC2__");
      
      if (LangOpts.ObjCExceptions)
        Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
    }

    if (LangOpts.getGC() != LangOptions::NonGC)
      Builder.defineMacro("__OBJC_GC__");

    if (LangOpts.ObjCRuntime.isNeXTFamily())
      Builder.defineMacro("__NEXT_RUNTIME__");

    Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))");
    Builder.defineMacro("IBOutletCollection(ClassName)",
                        "__attribute__((iboutletcollection(ClassName)))");
    Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
  }

  // darwin_constant_cfstrings controls this. This is also dependent
  // on other things like the runtime I believe.  This is set even for C code.
  if (!LangOpts.NoConstantCFStrings)
      Builder.defineMacro("__CONSTANT_CFSTRINGS__");

  if (LangOpts.ObjC2)
    Builder.defineMacro("OBJC_NEW_PROPERTIES");

  if (LangOpts.PascalStrings)
    Builder.defineMacro("__PASCAL_STRINGS__");

  if (LangOpts.Blocks) {
    Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
    Builder.defineMacro("__BLOCKS__");
  }

  if (LangOpts.CXXExceptions)
    Builder.defineMacro("__EXCEPTIONS");
  if (LangOpts.RTTI)
    Builder.defineMacro("__GXX_RTTI");
  if (LangOpts.SjLjExceptions)
    Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");

  if (LangOpts.Deprecated)
//.........这里部分代码省略.........

/// AddImplicitInclude - Add an implicit \#include of the specified file to the
/// predefines buffer.
/// As these includes are generated by -include arguments the header search
/// logic is going to search relatively to the current working directory.
static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) {
  Builder.append(Twine("#include \"") + File + "\"");
}

static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) {
  Builder.append(Twine("#__include_macros \"") + File + "\"");
  // Marker token to stop the __include_macros fetch loop.
  Builder.append("##"); // ##?
}

/// Initialize the predefined C++ language feature test macros defined in
/// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
                                                 MacroBuilder &Builder) {
  // C++98 features.
  if (LangOpts.RTTI)
    Builder.defineMacro("__cpp_rtti", "199711");
  if (LangOpts.CXXExceptions)
    Builder.defineMacro("__cpp_exceptions", "199711");

  // C++11 features.
  if (LangOpts.CPlusPlus11) {
    Builder.defineMacro("__cpp_unicode_characters", "200704");
    Builder.defineMacro("__cpp_raw_strings", "200710");
    Builder.defineMacro("__cpp_unicode_literals", "200710");
    Builder.defineMacro("__cpp_user_defined_literals", "200809");
    Builder.defineMacro("__cpp_lambdas", "200907");
    Builder.defineMacro("__cpp_constexpr",
                        LangOpts.CPlusPlus14 ? "201304" : "200704");
    Builder.defineMacro("__cpp_range_based_for", "200907");
    Builder.defineMacro("__cpp_static_assert", "200410");
    Builder.defineMacro("__cpp_decltype", "200707");
    Builder.defineMacro("__cpp_attributes", "200809");
    Builder.defineMacro("__cpp_rvalue_references", "200610");
    Builder.defineMacro("__cpp_variadic_templates", "200704");
    Builder.defineMacro("__cpp_initializer_lists", "200806");
    Builder.defineMacro("__cpp_delegating_constructors", "200604");
    Builder.defineMacro("__cpp_nsdmi", "200809");
    Builder.defineMacro("__cpp_inheriting_constructors", "200802");
    Builder.defineMacro("__cpp_ref_qualifiers", "200710");
    Builder.defineMacro("__cpp_alias_templates", "200704");
  }

  // C++14 features.
  if (LangOpts.CPlusPlus14) {
    Builder.defineMacro("__cpp_binary_literals", "201304");
    Builder.defineMacro("__cpp_digit_separators", "201309");
    Builder.defineMacro("__cpp_init_captures", "201304");
    Builder.defineMacro("__cpp_generic_lambdas", "201304");
    Builder.defineMacro("__cpp_decltype_auto", "201304");
    Builder.defineMacro("__cpp_return_type_deduction", "201304");
    Builder.defineMacro("__cpp_aggregate_nsdmi", "201304");
    Builder.defineMacro("__cpp_variable_templates", "201304");
  }
  if (LangOpts.SizedDeallocation)
    Builder.defineMacro("__cpp_sized_deallocation", "201309");
  if (LangOpts.ConceptsTS)
    Builder.defineMacro("__cpp_experimental_concepts", "1");
  if (LangOpts.Coroutines)
    Builder.defineMacro("__cpp_coroutines", "1");
}

static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
                                               const LangOptions &LangOpts,
                                               const FrontendOptions &FEOpts,
                                               MacroBuilder &Builder) {
  if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP)
    Builder.defineMacro("__STDC__");
  if (LangOpts.Freestanding)
    Builder.defineMacro("__STDC_HOSTED__", "0");
  else
    Builder.defineMacro("__STDC_HOSTED__");

  if (!LangOpts.CPlusPlus) {
    if (LangOpts.C11)
      Builder.defineMacro("__STDC_VERSION__", "201112L");
    else if (LangOpts.C99)
      Builder.defineMacro("__STDC_VERSION__", "199901L");
    else if (!LangOpts.GNUMode && LangOpts.Digraphs)
      Builder.defineMacro("__STDC_VERSION__", "199409L");
  } else {
    // FIXME: Use correct value for C++17.
    if (LangOpts.CPlusPlus1z)
      Builder.defineMacro("__cplusplus", "201406L");
    // C++1y [cpp.predefined]p1:
    //   The name __cplusplus is defined to the value 201402L when compiling a
    //   C++ translation unit.
    else if (LangOpts.CPlusPlus14)
      Builder.defineMacro("__cplusplus", "201402L");
    // C++11 [cpp.predefined]p1:
    //   The name __cplusplus is defined to the value 201103L when compiling a
    //   C++ translation unit.
    else if (LangOpts.CPlusPlus11)
      Builder.defineMacro("__cplusplus", "201103L");
    // C++03 [cpp.predefined]p1:
    //   The name __cplusplus is defined to the value 199711L when compiling a
    //   C++ translation unit.
    else
      Builder.defineMacro("__cplusplus", "199711L");
  }

  // In C11 these are environment macros. In C++11 they are only defined
  // as part of <cuchar>. To prevent breakage when mixing C and C++
  // code, define these macros unconditionally. We can define them
  // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit
  // and 32-bit character literals.
  Builder.defineMacro("__STDC_UTF_16__", "1");
  Builder.defineMacro("__STDC_UTF_32__", "1");

  if (LangOpts.ObjC1)
    Builder.defineMacro("__OBJC__");

  // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros.
  if (LangOpts.OpenCL) {
    // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the
    // language standard with which the program is compiled. __OPENCL_VERSION__
    // is for the OpenCL version supported by the OpenCL device, which is not
    // necessarily the language standard with which the program is compiled.
    // A shared OpenCL header file requires a macro to indicate the language
    // standard. As a workaround, __OPENCL_C_VERSION__ is defined for
    // OpenCL v1.0 and v1.1.
    switch (LangOpts.OpenCLVersion) {
    case 100:
      Builder.defineMacro("__OPENCL_C_VERSION__", "100");
      break;
    case 110:
      Builder.defineMacro("__OPENCL_C_VERSION__", "110");
      break;
    case 120:
      Builder.defineMacro("__OPENCL_C_VERSION__", "120");
      break;
    case 200:
      Builder.defineMacro("__OPENCL_C_VERSION__", "200");
      break;
    default:
      llvm_unreachable("Unsupported OpenCL version");
    }
    Builder.defineMacro("CL_VERSION_1_0", "100");
    Builder.defineMacro("CL_VERSION_1_1", "110");
    Builder.defineMacro("CL_VERSION_1_2", "120");
    Builder.defineMacro("CL_VERSION_2_0", "200");

    if (LangOpts.FastRelaxedMath)
      Builder.defineMacro("__FAST_RELAXED_MATH__");
  }
  // Not "standard" per se, but available even with the -undef flag.
  if (LangOpts.AsmPreprocessor)
    Builder.defineMacro("__ASSEMBLER__");
  if (LangOpts.CUDA)
    Builder.defineMacro("__CUDA__");
}

void MipsTargetInfo::getTargetDefines(const LangOptions &Opts,
                                      MacroBuilder &Builder) const {
  if (BigEndian) {
    DefineStd(Builder, "MIPSEB", Opts);
    Builder.defineMacro("_MIPSEB");
  } else {
    DefineStd(Builder, "MIPSEL", Opts);
    Builder.defineMacro("_MIPSEL");
  }

  Builder.defineMacro("__mips__");
  Builder.defineMacro("_mips");
  if (Opts.GNUMode)
    Builder.defineMacro("mips");

  if (ABI == "o32") {
    Builder.defineMacro("__mips", "32");
    Builder.defineMacro("_MIPS_ISA", "_MIPS_ISA_MIPS32");
  } else {
    Builder.defineMacro("__mips", "64");
    Builder.defineMacro("__mips64");
    Builder.defineMacro("__mips64__");
    Builder.defineMacro("_MIPS_ISA", "_MIPS_ISA_MIPS64");
  }

  const std::string ISARev = std::to_string(getISARev());

  if (!ISARev.empty())
    Builder.defineMacro("__mips_isa_rev", ISARev);

  if (ABI == "o32") {
    Builder.defineMacro("__mips_o32");
    Builder.defineMacro("_ABIO32", "1");
    Builder.defineMacro("_MIPS_SIM", "_ABIO32");
  } else if (ABI == "n32") {
    Builder.defineMacro("__mips_n32");
    Builder.defineMacro("_ABIN32", "2");
    Builder.defineMacro("_MIPS_SIM", "_ABIN32");
  } else if (ABI == "n64") {
    Builder.defineMacro("__mips_n64");
    Builder.defineMacro("_ABI64", "3");
    Builder.defineMacro("_MIPS_SIM", "_ABI64");
  } else
    llvm_unreachable("Invalid ABI.");

  if (!IsNoABICalls) {
    Builder.defineMacro("__mips_abicalls");
    if (CanUseBSDABICalls)
      Builder.defineMacro("__ABICALLS__");
  }

  Builder.defineMacro("__REGISTER_PREFIX__", "");

  switch (FloatABI) {
  case HardFloat:
    Builder.defineMacro("__mips_hard_float", Twine(1));
    break;
  case SoftFloat:
    Builder.defineMacro("__mips_soft_float", Twine(1));
    break;
  }

  if (IsSingleFloat)
    Builder.defineMacro("__mips_single_float", Twine(1));

  switch (FPMode) {
  case FPXX:
    Builder.defineMacro("__mips_fpr", Twine(0));
    break;
  case FP32:
    Builder.defineMacro("__mips_fpr", Twine(32));
    break;
  case FP64:
    Builder.defineMacro("__mips_fpr", Twine(64));
    break;
}

  if (FPMode == FP64 || IsSingleFloat)
    Builder.defineMacro("_MIPS_FPSET", Twine(32));
  else
    Builder.defineMacro("_MIPS_FPSET", Twine(16));

  if (IsMips16)
    Builder.defineMacro("__mips16", Twine(1));

  if (IsMicromips)
    Builder.defineMacro("__mips_micromips", Twine(1));

  if (IsNan2008)
    Builder.defineMacro("__mips_nan2008", Twine(1));

  if (IsAbs2008)
    Builder.defineMacro("__mips_abs2008", Twine(1));

  switch (DspRev) {
  default:
    break;
  case DSP1:
    Builder.defineMacro("__mips_dsp_rev", Twine(1));
    Builder.defineMacro("__mips_dsp", Twine(1));
//.........这里部分代码省略.........

/// AddImplicitInclude - Add an implicit #include of the specified file to the
/// predefines buffer.
static void AddImplicitInclude(MacroBuilder &Builder, llvm::StringRef File) {
  Builder.append("#include \"" +
                 llvm::Twine(NormalizeDashIncludePath(File)) + "\"");
}

static void InitializePredefinedMacros(const TargetInfo &TI,
                                       const LangOptions &LangOpts,
                                       const FrontendOptions &FEOpts,
                                       MacroBuilder &Builder) {
  // Compiler version introspection macros.
  Builder.defineMacro("__llvm__");  // LLVM Backend
  Builder.defineMacro("__clang__"); // Clang Frontend
#define TOSTR2(X) #X
#define TOSTR(X) TOSTR2(X)
  Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
  Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
  Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
#undef TOSTR
#undef TOSTR2
  Builder.defineMacro("__clang_version__", 
                      "\"" CLANG_VERSION_STRING " "
                      + getClangFullRepositoryVersion() + "\"");
  if (!LangOpts.MSVCCompat) {
    // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're
    // not compiling for MSVC compatibility
    Builder.defineMacro("__GNUC_MINOR__", "2");
    Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
    Builder.defineMacro("__GNUC__", "4");
    Builder.defineMacro("__GXX_ABI_VERSION", "1002");
  }

  // Define macros for the C11 / C++11 memory orderings
  Builder.defineMacro("__ATOMIC_RELAXED", "0");
  Builder.defineMacro("__ATOMIC_CONSUME", "1");
  Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
  Builder.defineMacro("__ATOMIC_RELEASE", "3");
  Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
  Builder.defineMacro("__ATOMIC_SEQ_CST", "5");

  // Support for #pragma redefine_extname (Sun compatibility)
  Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");

  // As sad as it is, enough software depends on the __VERSION__ for version
  // checks that it is necessary to report 4.2.1 (the base GCC version we claim
  // compatibility with) first.
  Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 
                      Twine(getClangFullCPPVersion()) + "\"");

  // Initialize language-specific preprocessor defines.

  // Standard conforming mode?
  if (!LangOpts.GNUMode && !LangOpts.MSVCCompat)
    Builder.defineMacro("__STRICT_ANSI__");

  if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11)
    Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");

  if (LangOpts.ObjC1) {
    if (LangOpts.ObjCRuntime.isNonFragile()) {
      Builder.defineMacro("__OBJC2__");
      
      if (LangOpts.ObjCExceptions)
        Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
    }

    if (LangOpts.getGC() != LangOptions::NonGC)
      Builder.defineMacro("__OBJC_GC__");

    if (LangOpts.ObjCRuntime.isNeXTFamily())
      Builder.defineMacro("__NEXT_RUNTIME__");

    if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) {
      VersionTuple tuple = LangOpts.ObjCRuntime.getVersion();

      unsigned minor = 0;
      if (tuple.getMinor().hasValue())
        minor = tuple.getMinor().getValue();

      unsigned subminor = 0;
      if (tuple.getSubminor().hasValue())
        subminor = tuple.getSubminor().getValue();

      Builder.defineMacro("__OBJFW_RUNTIME_ABI__",
                          Twine(tuple.getMajor() * 10000 + minor * 100 +
                                subminor));
    }

    Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))");
    Builder.defineMacro("IBOutletCollection(ClassName)",
                        "__attribute__((iboutletcollection(ClassName)))");
    Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
    Builder.defineMacro("IBInspectable", "");
    Builder.defineMacro("IB_DESIGNABLE", "");
  }

  if (LangOpts.CPlusPlus)
    InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder);

  // darwin_constant_cfstrings controls this. This is also dependent
  // on other things like the runtime I believe.  This is set even for C code.
  if (!LangOpts.NoConstantCFStrings)
      Builder.defineMacro("__CONSTANT_CFSTRINGS__");

  if (LangOpts.ObjC2)
    Builder.defineMacro("OBJC_NEW_PROPERTIES");
//.........这里部分代码省略.........