1 //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements the clang::InitializePreprocessor function. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "clang/Frontend/Utils.h" 15 #include "clang/Basic/FileManager.h" 16 #include "clang/Basic/MacroBuilder.h" 17 #include "clang/Basic/SourceManager.h" 18 #include "clang/Basic/TargetInfo.h" 19 #include "clang/Basic/Version.h" 20 #include "clang/Frontend/FrontendDiagnostic.h" 21 #include "clang/Frontend/FrontendOptions.h" 22 #include "clang/Lex/HeaderSearch.h" 23 #include "clang/Lex/Preprocessor.h" 24 #include "clang/Lex/PreprocessorOptions.h" 25 #include "clang/Serialization/ASTReader.h" 26 #include "llvm/ADT/APFloat.h" 27 #include "llvm/Support/FileSystem.h" 28 #include "llvm/Support/MemoryBuffer.h" 29 #include "llvm/Support/Path.h" 30 using namespace clang; 31 32 static bool MacroBodyEndsInBackslash(StringRef MacroBody) { 33 while (!MacroBody.empty() && isWhitespace(MacroBody.back())) 34 MacroBody = MacroBody.drop_back(); 35 return !MacroBody.empty() && MacroBody.back() == '\\'; 36 } 37 38 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 39 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 40 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 41 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, 42 DiagnosticsEngine &Diags) { 43 std::pair<StringRef, StringRef> MacroPair = Macro.split('='); 44 StringRef MacroName = MacroPair.first; 45 StringRef MacroBody = MacroPair.second; 46 if (MacroName.size() != Macro.size()) { 47 // Per GCC -D semantics, the macro ends at \n if it exists. 48 StringRef::size_type End = MacroBody.find_first_of("\n\r"); 49 if (End != StringRef::npos) 50 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 51 << MacroName; 52 MacroBody = MacroBody.substr(0, End); 53 // We handle macro bodies which end in a backslash by appending an extra 54 // backslash+newline. This makes sure we don't accidentally treat the 55 // backslash as a line continuation marker. 56 if (MacroBodyEndsInBackslash(MacroBody)) 57 Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n"); 58 else 59 Builder.defineMacro(MacroName, MacroBody); 60 } else { 61 // Push "macroname 1". 62 Builder.defineMacro(Macro); 63 } 64 } 65 66 /// AddImplicitInclude - Add an implicit \#include of the specified file to the 67 /// predefines buffer. 68 /// As these includes are generated by -include arguments the header search 69 /// logic is going to search relatively to the current working directory. 70 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { 71 Builder.append(Twine("#include \"") + File + "\""); 72 } 73 74 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { 75 Builder.append(Twine("#__include_macros \"") + File + "\""); 76 // Marker token to stop the __include_macros fetch loop. 77 Builder.append("##"); // ##? 78 } 79 80 /// AddImplicitIncludePTH - Add an implicit \#include using the original file 81 /// used to generate a PTH cache. 82 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 83 StringRef ImplicitIncludePTH) { 84 PTHManager *P = PP.getPTHManager(); 85 // Null check 'P' in the corner case where it couldn't be created. 86 const char *OriginalFile = P ? P->getOriginalSourceFile() : nullptr; 87 88 if (!OriginalFile) { 89 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 90 << ImplicitIncludePTH; 91 return; 92 } 93 94 AddImplicitInclude(Builder, OriginalFile); 95 } 96 97 /// \brief Add an implicit \#include using the original file used to generate 98 /// a PCH file. 99 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 100 const PCHContainerReader &PCHContainerRdr, 101 StringRef ImplicitIncludePCH) { 102 std::string OriginalFile = 103 ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(), 104 PCHContainerRdr, PP.getDiagnostics()); 105 if (OriginalFile.empty()) 106 return; 107 108 AddImplicitInclude(Builder, OriginalFile); 109 } 110 111 /// PickFP - This is used to pick a value based on the FP semantics of the 112 /// specified FP model. 113 template <typename T> 114 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, 115 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 116 T IEEEQuadVal) { 117 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) 118 return IEEESingleVal; 119 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) 120 return IEEEDoubleVal; 121 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) 122 return X87DoubleExtendedVal; 123 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) 124 return PPCDoubleDoubleVal; 125 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); 126 return IEEEQuadVal; 127 } 128 129 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 130 const llvm::fltSemantics *Sem, StringRef Ext) { 131 const char *DenormMin, *Epsilon, *Max, *Min; 132 DenormMin = PickFP(Sem, "1.40129846e-45", "4.9406564584124654e-324", 133 "3.64519953188247460253e-4951", 134 "4.94065645841246544176568792868221e-324", 135 "6.47517511943802511092443895822764655e-4966"); 136 int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 137 int DecimalDigits = PickFP(Sem, 9, 17, 21, 33, 36); 138 Epsilon = PickFP(Sem, "1.19209290e-7", "2.2204460492503131e-16", 139 "1.08420217248550443401e-19", 140 "4.94065645841246544176568792868221e-324", 141 "1.92592994438723585305597794258492732e-34"); 142 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 143 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 144 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 145 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 146 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 147 Min = PickFP(Sem, "1.17549435e-38", "2.2250738585072014e-308", 148 "3.36210314311209350626e-4932", 149 "2.00416836000897277799610805135016e-292", 150 "3.36210314311209350626267781732175260e-4932"); 151 Max = PickFP(Sem, "3.40282347e+38", "1.7976931348623157e+308", 152 "1.18973149535723176502e+4932", 153 "1.79769313486231580793728971405301e+308", 154 "1.18973149535723176508575932662800702e+4932"); 155 156 SmallString<32> DefPrefix; 157 DefPrefix = "__"; 158 DefPrefix += Prefix; 159 DefPrefix += "_"; 160 161 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); 162 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 163 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 164 Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits)); 165 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext); 166 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 167 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 168 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); 169 170 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); 171 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); 172 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext); 173 174 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); 175 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); 176 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext); 177 } 178 179 180 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 181 /// named MacroName with the max value for a type with width 'TypeWidth' a 182 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 183 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, 184 StringRef ValSuffix, bool isSigned, 185 MacroBuilder &Builder) { 186 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 187 : llvm::APInt::getMaxValue(TypeWidth); 188 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix); 189 } 190 191 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 192 /// the width, suffix, and signedness of the given type 193 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty, 194 const TargetInfo &TI, MacroBuilder &Builder) { 195 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 196 TI.isTypeSigned(Ty), Builder); 197 } 198 199 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, 200 const TargetInfo &TI, MacroBuilder &Builder) { 201 bool IsSigned = TI.isTypeSigned(Ty); 202 StringRef FmtModifier = TI.getTypeFormatModifier(Ty); 203 for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) { 204 Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__", 205 Twine("\"") + FmtModifier + Twine(*Fmt) + "\""); 206 } 207 } 208 209 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 210 MacroBuilder &Builder) { 211 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 212 } 213 214 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, 215 const TargetInfo &TI, MacroBuilder &Builder) { 216 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 217 } 218 219 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 220 const TargetInfo &TI, MacroBuilder &Builder) { 221 Builder.defineMacro(MacroName, 222 Twine(BitWidth / TI.getCharWidth())); 223 } 224 225 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 226 const TargetInfo &TI, 227 MacroBuilder &Builder) { 228 int TypeWidth = TI.getTypeWidth(Ty); 229 bool IsSigned = TI.isTypeSigned(Ty); 230 231 // Use the target specified int64 type, when appropriate, so that [u]int64_t 232 // ends up being defined in terms of the correct type. 233 if (TypeWidth == 64) 234 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 235 236 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 237 238 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 239 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 240 241 StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty)); 242 Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix); 243 } 244 245 static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, 246 const TargetInfo &TI, 247 MacroBuilder &Builder) { 248 int TypeWidth = TI.getTypeWidth(Ty); 249 bool IsSigned = TI.isTypeSigned(Ty); 250 251 // Use the target specified int64 type, when appropriate, so that [u]int64_t 252 // ends up being defined in terms of the correct type. 253 if (TypeWidth == 64) 254 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 255 256 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 257 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 258 } 259 260 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, 261 const TargetInfo &TI, 262 MacroBuilder &Builder) { 263 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 264 if (Ty == TargetInfo::NoInt) 265 return; 266 267 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST"; 268 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 269 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 270 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 271 } 272 273 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, 274 const TargetInfo &TI, MacroBuilder &Builder) { 275 // stdint.h currently defines the fast int types as equivalent to the least 276 // types. 277 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 278 if (Ty == TargetInfo::NoInt) 279 return; 280 281 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST"; 282 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 283 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 284 285 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 286 } 287 288 289 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with 290 /// the specified properties. 291 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, 292 unsigned InlineWidth) { 293 // Fully-aligned, power-of-2 sizes no larger than the inline 294 // width will be inlined as lock-free operations. 295 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && 296 TypeWidth <= InlineWidth) 297 return "2"; // "always lock free" 298 // We cannot be certain what operations the lib calls might be 299 // able to implement as lock-free on future processors. 300 return "1"; // "sometimes lock free" 301 } 302 303 /// \brief Add definitions required for a smooth interaction between 304 /// Objective-C++ automated reference counting and libstdc++ (4.2). 305 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 306 MacroBuilder &Builder) { 307 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 308 309 std::string Result; 310 { 311 // Provide specializations for the __is_scalar type trait so that 312 // lifetime-qualified objects are not considered "scalar" types, which 313 // libstdc++ uses as an indicator of the presence of trivial copy, assign, 314 // default-construct, and destruct semantics (none of which hold for 315 // lifetime-qualified objects in ARC). 316 llvm::raw_string_ostream Out(Result); 317 318 Out << "namespace std {\n" 319 << "\n" 320 << "struct __true_type;\n" 321 << "struct __false_type;\n" 322 << "\n"; 323 324 Out << "template<typename _Tp> struct __is_scalar;\n" 325 << "\n"; 326 327 if (LangOpts.ObjCAutoRefCount) { 328 Out << "template<typename _Tp>\n" 329 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 330 << " enum { __value = 0 };\n" 331 << " typedef __false_type __type;\n" 332 << "};\n" 333 << "\n"; 334 } 335 336 if (LangOpts.ObjCWeak) { 337 Out << "template<typename _Tp>\n" 338 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 339 << " enum { __value = 0 };\n" 340 << " typedef __false_type __type;\n" 341 << "};\n" 342 << "\n"; 343 } 344 345 if (LangOpts.ObjCAutoRefCount) { 346 Out << "template<typename _Tp>\n" 347 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 348 << " _Tp> {\n" 349 << " enum { __value = 0 };\n" 350 << " typedef __false_type __type;\n" 351 << "};\n" 352 << "\n"; 353 } 354 355 Out << "}\n"; 356 } 357 Builder.append(Result); 358 } 359 360 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 361 const LangOptions &LangOpts, 362 const FrontendOptions &FEOpts, 363 MacroBuilder &Builder) { 364 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) 365 Builder.defineMacro("__STDC__"); 366 if (LangOpts.Freestanding) 367 Builder.defineMacro("__STDC_HOSTED__", "0"); 368 else 369 Builder.defineMacro("__STDC_HOSTED__"); 370 371 if (!LangOpts.CPlusPlus) { 372 if (LangOpts.C11) 373 Builder.defineMacro("__STDC_VERSION__", "201112L"); 374 else if (LangOpts.C99) 375 Builder.defineMacro("__STDC_VERSION__", "199901L"); 376 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 377 Builder.defineMacro("__STDC_VERSION__", "199409L"); 378 } else { 379 // FIXME: Use correct value for C++17. 380 if (LangOpts.CPlusPlus1z) 381 Builder.defineMacro("__cplusplus", "201406L"); 382 // C++1y [cpp.predefined]p1: 383 // The name __cplusplus is defined to the value 201402L when compiling a 384 // C++ translation unit. 385 else if (LangOpts.CPlusPlus14) 386 Builder.defineMacro("__cplusplus", "201402L"); 387 // C++11 [cpp.predefined]p1: 388 // The name __cplusplus is defined to the value 201103L when compiling a 389 // C++ translation unit. 390 else if (LangOpts.CPlusPlus11) 391 Builder.defineMacro("__cplusplus", "201103L"); 392 // C++03 [cpp.predefined]p1: 393 // The name __cplusplus is defined to the value 199711L when compiling a 394 // C++ translation unit. 395 else 396 Builder.defineMacro("__cplusplus", "199711L"); 397 } 398 399 // In C11 these are environment macros. In C++11 they are only defined 400 // as part of <cuchar>. To prevent breakage when mixing C and C++ 401 // code, define these macros unconditionally. We can define them 402 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 403 // and 32-bit character literals. 404 Builder.defineMacro("__STDC_UTF_16__", "1"); 405 Builder.defineMacro("__STDC_UTF_32__", "1"); 406 407 if (LangOpts.ObjC1) 408 Builder.defineMacro("__OBJC__"); 409 410 // Not "standard" per se, but available even with the -undef flag. 411 if (LangOpts.AsmPreprocessor) 412 Builder.defineMacro("__ASSEMBLER__"); 413 } 414 415 /// Initialize the predefined C++ language feature test macros defined in 416 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 417 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 418 MacroBuilder &Builder) { 419 // C++98 features. 420 if (LangOpts.RTTI) 421 Builder.defineMacro("__cpp_rtti", "199711"); 422 if (LangOpts.CXXExceptions) 423 Builder.defineMacro("__cpp_exceptions", "199711"); 424 425 // C++11 features. 426 if (LangOpts.CPlusPlus11) { 427 Builder.defineMacro("__cpp_unicode_characters", "200704"); 428 Builder.defineMacro("__cpp_raw_strings", "200710"); 429 Builder.defineMacro("__cpp_unicode_literals", "200710"); 430 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 431 Builder.defineMacro("__cpp_lambdas", "200907"); 432 Builder.defineMacro("__cpp_constexpr", 433 LangOpts.CPlusPlus14 ? "201304" : "200704"); 434 Builder.defineMacro("__cpp_range_based_for", "200907"); 435 Builder.defineMacro("__cpp_static_assert", "200410"); 436 Builder.defineMacro("__cpp_decltype", "200707"); 437 Builder.defineMacro("__cpp_attributes", "200809"); 438 Builder.defineMacro("__cpp_rvalue_references", "200610"); 439 Builder.defineMacro("__cpp_variadic_templates", "200704"); 440 Builder.defineMacro("__cpp_initializer_lists", "200806"); 441 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 442 Builder.defineMacro("__cpp_nsdmi", "200809"); 443 Builder.defineMacro("__cpp_inheriting_constructors", "200802"); 444 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 445 Builder.defineMacro("__cpp_alias_templates", "200704"); 446 } 447 448 // C++14 features. 449 if (LangOpts.CPlusPlus14) { 450 Builder.defineMacro("__cpp_binary_literals", "201304"); 451 Builder.defineMacro("__cpp_digit_separators", "201309"); 452 Builder.defineMacro("__cpp_init_captures", "201304"); 453 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 454 Builder.defineMacro("__cpp_decltype_auto", "201304"); 455 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 456 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 457 Builder.defineMacro("__cpp_variable_templates", "201304"); 458 } 459 if (LangOpts.SizedDeallocation) 460 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 461 if (LangOpts.ConceptsTS) 462 Builder.defineMacro("__cpp_experimental_concepts", "1"); 463 if (LangOpts.Coroutines) 464 Builder.defineMacro("__cpp_coroutines", "1"); 465 } 466 467 static void InitializePredefinedMacros(const TargetInfo &TI, 468 const LangOptions &LangOpts, 469 const FrontendOptions &FEOpts, 470 MacroBuilder &Builder) { 471 // Compiler version introspection macros. 472 Builder.defineMacro("__llvm__"); // LLVM Backend 473 Builder.defineMacro("__clang__"); // Clang Frontend 474 #define TOSTR2(X) #X 475 #define TOSTR(X) TOSTR2(X) 476 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 477 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 478 #ifdef CLANG_VERSION_PATCHLEVEL 479 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 480 #else 481 Builder.defineMacro("__clang_patchlevel__", "0"); 482 #endif 483 Builder.defineMacro("__clang_version__", 484 "\"" CLANG_VERSION_STRING " " 485 + getClangFullRepositoryVersion() + "\""); 486 #undef TOSTR 487 #undef TOSTR2 488 if (!LangOpts.MSVCCompat) { 489 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 490 // not compiling for MSVC compatibility 491 Builder.defineMacro("__GNUC_MINOR__", "2"); 492 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 493 Builder.defineMacro("__GNUC__", "4"); 494 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 495 } 496 497 // Define macros for the C11 / C++11 memory orderings 498 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 499 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 500 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 501 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 502 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 503 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 504 505 // Support for #pragma redefine_extname (Sun compatibility) 506 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 507 508 // As sad as it is, enough software depends on the __VERSION__ for version 509 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 510 // compatibility with) first. 511 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 512 Twine(getClangFullCPPVersion()) + "\""); 513 514 // Initialize language-specific preprocessor defines. 515 516 // Standard conforming mode? 517 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 518 Builder.defineMacro("__STRICT_ANSI__"); 519 520 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 521 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 522 523 if (LangOpts.ObjC1) { 524 if (LangOpts.ObjCRuntime.isNonFragile()) { 525 Builder.defineMacro("__OBJC2__"); 526 527 if (LangOpts.ObjCExceptions) 528 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 529 } 530 531 if (LangOpts.getGC() != LangOptions::NonGC) 532 Builder.defineMacro("__OBJC_GC__"); 533 534 if (LangOpts.ObjCRuntime.isNeXTFamily()) 535 Builder.defineMacro("__NEXT_RUNTIME__"); 536 537 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 538 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 539 540 unsigned minor = 0; 541 if (tuple.getMinor().hasValue()) 542 minor = tuple.getMinor().getValue(); 543 544 unsigned subminor = 0; 545 if (tuple.getSubminor().hasValue()) 546 subminor = tuple.getSubminor().getValue(); 547 548 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 549 Twine(tuple.getMajor() * 10000 + minor * 100 + 550 subminor)); 551 } 552 553 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 554 Builder.defineMacro("IBOutletCollection(ClassName)", 555 "__attribute__((iboutletcollection(ClassName)))"); 556 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 557 Builder.defineMacro("IBInspectable", ""); 558 Builder.defineMacro("IB_DESIGNABLE", ""); 559 } 560 561 if (LangOpts.CPlusPlus) 562 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 563 564 // darwin_constant_cfstrings controls this. This is also dependent 565 // on other things like the runtime I believe. This is set even for C code. 566 if (!LangOpts.NoConstantCFStrings) 567 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 568 569 if (LangOpts.ObjC2) 570 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 571 572 if (LangOpts.PascalStrings) 573 Builder.defineMacro("__PASCAL_STRINGS__"); 574 575 if (LangOpts.Blocks) { 576 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 577 Builder.defineMacro("__BLOCKS__"); 578 } 579 580 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 581 Builder.defineMacro("__EXCEPTIONS"); 582 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 583 Builder.defineMacro("__GXX_RTTI"); 584 if (LangOpts.SjLjExceptions) 585 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 586 587 if (LangOpts.Deprecated) 588 Builder.defineMacro("__DEPRECATED"); 589 590 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 591 Builder.defineMacro("__GNUG__", "4"); 592 Builder.defineMacro("__GXX_WEAK__"); 593 Builder.defineMacro("__private_extern__", "extern"); 594 } 595 596 if (LangOpts.MicrosoftExt) { 597 if (LangOpts.WChar) { 598 // wchar_t supported as a keyword. 599 Builder.defineMacro("_WCHAR_T_DEFINED"); 600 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 601 } 602 } 603 604 if (LangOpts.Optimize) 605 Builder.defineMacro("__OPTIMIZE__"); 606 if (LangOpts.OptimizeSize) 607 Builder.defineMacro("__OPTIMIZE_SIZE__"); 608 609 if (LangOpts.FastMath) 610 Builder.defineMacro("__FAST_MATH__"); 611 612 // Initialize target-specific preprocessor defines. 613 614 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 615 // to the macro __BYTE_ORDER (no trailing underscores) 616 // from glibc's <endian.h> header. 617 // We don't support the PDP-11 as a target, but include 618 // the define so it can still be compared against. 619 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 620 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 621 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 622 if (TI.isBigEndian()) { 623 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 624 Builder.defineMacro("__BIG_ENDIAN__"); 625 } else { 626 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 627 Builder.defineMacro("__LITTLE_ENDIAN__"); 628 } 629 630 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 631 && TI.getIntWidth() == 32) { 632 Builder.defineMacro("_LP64"); 633 Builder.defineMacro("__LP64__"); 634 } 635 636 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 637 && TI.getIntWidth() == 32) { 638 Builder.defineMacro("_ILP32"); 639 Builder.defineMacro("__ILP32__"); 640 } 641 642 // Define type sizing macros based on the target properties. 643 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 644 Builder.defineMacro("__CHAR_BIT__", "8"); 645 646 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 647 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 648 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 649 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 650 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 651 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 652 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 653 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 654 655 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 656 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 657 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 658 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 659 660 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 661 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 662 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 663 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 664 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 665 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 666 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 667 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 668 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 669 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 670 DefineTypeSizeof("__SIZEOF_SIZE_T__", 671 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 672 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 673 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 674 DefineTypeSizeof("__SIZEOF_WINT_T__", 675 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 676 if (TI.hasInt128Type()) 677 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 678 679 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 680 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 681 Builder.defineMacro("__INTMAX_C_SUFFIX__", 682 TI.getTypeConstantSuffix(TI.getIntMaxType())); 683 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 684 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 685 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 686 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 687 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 688 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 689 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 690 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 691 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 692 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 693 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 694 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 695 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 696 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 697 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 698 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 699 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 700 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 701 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 702 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 703 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 704 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 705 706 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 707 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 708 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 709 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 710 711 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 712 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 713 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 714 715 // Define a __POINTER_WIDTH__ macro for stdint.h. 716 Builder.defineMacro("__POINTER_WIDTH__", 717 Twine((int)TI.getPointerWidth(0))); 718 719 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 720 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 721 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 722 723 if (!LangOpts.CharIsSigned) 724 Builder.defineMacro("__CHAR_UNSIGNED__"); 725 726 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 727 Builder.defineMacro("__WCHAR_UNSIGNED__"); 728 729 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 730 Builder.defineMacro("__WINT_UNSIGNED__"); 731 732 // Define exact-width integer types for stdint.h 733 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 734 735 if (TI.getShortWidth() > TI.getCharWidth()) 736 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 737 738 if (TI.getIntWidth() > TI.getShortWidth()) 739 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 740 741 if (TI.getLongWidth() > TI.getIntWidth()) 742 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 743 744 if (TI.getLongLongWidth() > TI.getLongWidth()) 745 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 746 747 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 748 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 749 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 750 751 if (TI.getShortWidth() > TI.getCharWidth()) { 752 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 753 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 754 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 755 } 756 757 if (TI.getIntWidth() > TI.getShortWidth()) { 758 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 759 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 760 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 761 } 762 763 if (TI.getLongWidth() > TI.getIntWidth()) { 764 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 765 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 766 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 767 } 768 769 if (TI.getLongLongWidth() > TI.getLongWidth()) { 770 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 771 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 772 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 773 } 774 775 DefineLeastWidthIntType(8, true, TI, Builder); 776 DefineLeastWidthIntType(8, false, TI, Builder); 777 DefineLeastWidthIntType(16, true, TI, Builder); 778 DefineLeastWidthIntType(16, false, TI, Builder); 779 DefineLeastWidthIntType(32, true, TI, Builder); 780 DefineLeastWidthIntType(32, false, TI, Builder); 781 DefineLeastWidthIntType(64, true, TI, Builder); 782 DefineLeastWidthIntType(64, false, TI, Builder); 783 784 DefineFastIntType(8, true, TI, Builder); 785 DefineFastIntType(8, false, TI, Builder); 786 DefineFastIntType(16, true, TI, Builder); 787 DefineFastIntType(16, false, TI, Builder); 788 DefineFastIntType(32, true, TI, Builder); 789 DefineFastIntType(32, false, TI, Builder); 790 DefineFastIntType(64, true, TI, Builder); 791 DefineFastIntType(64, false, TI, Builder); 792 793 if (const char *Prefix = TI.getUserLabelPrefix()) 794 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix); 795 796 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 797 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 798 else 799 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 800 801 if (!LangOpts.MSVCCompat) { 802 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 803 Builder.defineMacro("__GNUC_GNU_INLINE__"); 804 else 805 Builder.defineMacro("__GNUC_STDC_INLINE__"); 806 807 // The value written by __atomic_test_and_set. 808 // FIXME: This is target-dependent. 809 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 810 811 // Used by libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 812 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 813 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 814 Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \ 815 getLockFreeValue(TI.get##Type##Width(), \ 816 TI.get##Type##Align(), \ 817 InlineWidthBits)); 818 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 819 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 820 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 821 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 822 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 823 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 824 DEFINE_LOCK_FREE_MACRO(INT, Int); 825 DEFINE_LOCK_FREE_MACRO(LONG, Long); 826 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 827 Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE", 828 getLockFreeValue(TI.getPointerWidth(0), 829 TI.getPointerAlign(0), 830 InlineWidthBits)); 831 #undef DEFINE_LOCK_FREE_MACRO 832 } 833 834 if (LangOpts.NoInlineDefine) 835 Builder.defineMacro("__NO_INLINE__"); 836 837 if (unsigned PICLevel = LangOpts.PICLevel) { 838 Builder.defineMacro("__PIC__", Twine(PICLevel)); 839 Builder.defineMacro("__pic__", Twine(PICLevel)); 840 } 841 if (unsigned PIELevel = LangOpts.PIELevel) { 842 Builder.defineMacro("__PIE__", Twine(PIELevel)); 843 Builder.defineMacro("__pie__", Twine(PIELevel)); 844 } 845 846 // Macros to control C99 numerics and <float.h> 847 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 848 Builder.defineMacro("__FLT_RADIX__", "2"); 849 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 850 851 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 852 Builder.defineMacro("__SSP__"); 853 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 854 Builder.defineMacro("__SSP_STRONG__", "2"); 855 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 856 Builder.defineMacro("__SSP_ALL__", "3"); 857 858 // Define a macro that exists only when using the static analyzer. 859 if (FEOpts.ProgramAction == frontend::RunAnalysis) 860 Builder.defineMacro("__clang_analyzer__"); 861 862 if (LangOpts.FastRelaxedMath) 863 Builder.defineMacro("__FAST_RELAXED_MATH__"); 864 865 if (FEOpts.ProgramAction == frontend::RewriteObjC || 866 LangOpts.getGC() != LangOptions::NonGC) { 867 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 868 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 869 } else if (LangOpts.ObjC1) { 870 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 871 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 872 Builder.defineMacro("__autoreleasing", 873 "__attribute__((objc_ownership(autoreleasing)))"); 874 Builder.defineMacro("__unsafe_unretained", 875 "__attribute__((objc_ownership(none)))"); 876 } 877 878 // On Darwin, there are __double_underscored variants of the type 879 // nullability qualifiers. 880 if (TI.getTriple().isOSDarwin()) { 881 Builder.defineMacro("__nonnull", "_Nonnull"); 882 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 883 Builder.defineMacro("__nullable", "_Nullable"); 884 } 885 886 // OpenMP definition 887 if (LangOpts.OpenMP) { 888 // OpenMP 2.2: 889 // In implementations that support a preprocessor, the _OPENMP 890 // macro name is defined to have the decimal value yyyymm where 891 // yyyy and mm are the year and the month designations of the 892 // version of the OpenMP API that the implementation support. 893 Builder.defineMacro("_OPENMP", "201307"); 894 } 895 896 // CUDA device path compilaton 897 if (LangOpts.CUDAIsDevice) { 898 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 899 // backend's target defines. 900 Builder.defineMacro("__CUDA_ARCH__"); 901 } 902 903 // Get other target #defines. 904 TI.getTargetDefines(LangOpts, Builder); 905 } 906 907 /// InitializePreprocessor - Initialize the preprocessor getting it and the 908 /// environment ready to process a single file. This returns true on error. 909 /// 910 void clang::InitializePreprocessor( 911 Preprocessor &PP, const PreprocessorOptions &InitOpts, 912 const PCHContainerReader &PCHContainerRdr, 913 const FrontendOptions &FEOpts) { 914 const LangOptions &LangOpts = PP.getLangOpts(); 915 std::string PredefineBuffer; 916 PredefineBuffer.reserve(4080); 917 llvm::raw_string_ostream Predefines(PredefineBuffer); 918 MacroBuilder Builder(Predefines); 919 920 // Emit line markers for various builtin sections of the file. We don't do 921 // this in asm preprocessor mode, because "# 4" is not a line marker directive 922 // in this mode. 923 if (!PP.getLangOpts().AsmPreprocessor) 924 Builder.append("# 1 \"<built-in>\" 3"); 925 926 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 927 if (InitOpts.UsePredefines) { 928 if (LangOpts.CUDA && PP.getAuxTargetInfo()) 929 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 930 Builder); 931 932 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 933 934 // Install definitions to make Objective-C++ ARC work well with various 935 // C++ Standard Library implementations. 936 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 937 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 938 switch (InitOpts.ObjCXXARCStandardLibrary) { 939 case ARCXX_nolib: 940 case ARCXX_libcxx: 941 break; 942 943 case ARCXX_libstdcxx: 944 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 945 break; 946 } 947 } 948 } 949 950 // Even with predefines off, some macros are still predefined. 951 // These should all be defined in the preprocessor according to the 952 // current language configuration. 953 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 954 FEOpts, Builder); 955 956 // Add on the predefines from the driver. Wrap in a #line directive to report 957 // that they come from the command line. 958 if (!PP.getLangOpts().AsmPreprocessor) 959 Builder.append("# 1 \"<command line>\" 1"); 960 961 // Process #define's and #undef's in the order they are given. 962 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 963 if (InitOpts.Macros[i].second) // isUndef 964 Builder.undefineMacro(InitOpts.Macros[i].first); 965 else 966 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 967 PP.getDiagnostics()); 968 } 969 970 // If -imacros are specified, include them now. These are processed before 971 // any -include directives. 972 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 973 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 974 975 // Process -include-pch/-include-pth directives. 976 if (!InitOpts.ImplicitPCHInclude.empty()) 977 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 978 InitOpts.ImplicitPCHInclude); 979 if (!InitOpts.ImplicitPTHInclude.empty()) 980 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 981 982 // Process -include directives. 983 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 984 const std::string &Path = InitOpts.Includes[i]; 985 AddImplicitInclude(Builder, Path); 986 } 987 988 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 989 if (!PP.getLangOpts().AsmPreprocessor) 990 Builder.append("# 1 \"<built-in>\" 2"); 991 992 // Instruct the preprocessor to skip the preamble. 993 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 994 InitOpts.PrecompiledPreambleBytes.second); 995 996 // Copy PredefinedBuffer into the Preprocessor. 997 PP.setPredefines(Predefines.str()); 998 } 999