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 Out << "template<typename _Tp>\n" 328 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 329 << " enum { __value = 0 };\n" 330 << " typedef __false_type __type;\n" 331 << "};\n" 332 << "\n"; 333 334 if (LangOpts.ObjCARCWeak) { 335 Out << "template<typename _Tp>\n" 336 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 337 << " enum { __value = 0 };\n" 338 << " typedef __false_type __type;\n" 339 << "};\n" 340 << "\n"; 341 } 342 343 Out << "template<typename _Tp>\n" 344 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 345 << " _Tp> {\n" 346 << " enum { __value = 0 };\n" 347 << " typedef __false_type __type;\n" 348 << "};\n" 349 << "\n"; 350 351 Out << "}\n"; 352 } 353 Builder.append(Result); 354 } 355 356 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 357 const LangOptions &LangOpts, 358 const FrontendOptions &FEOpts, 359 MacroBuilder &Builder) { 360 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) 361 Builder.defineMacro("__STDC__"); 362 if (LangOpts.Freestanding) 363 Builder.defineMacro("__STDC_HOSTED__", "0"); 364 else 365 Builder.defineMacro("__STDC_HOSTED__"); 366 367 if (!LangOpts.CPlusPlus) { 368 if (LangOpts.C11) 369 Builder.defineMacro("__STDC_VERSION__", "201112L"); 370 else if (LangOpts.C99) 371 Builder.defineMacro("__STDC_VERSION__", "199901L"); 372 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 373 Builder.defineMacro("__STDC_VERSION__", "199409L"); 374 } else { 375 // FIXME: Use correct value for C++17. 376 if (LangOpts.CPlusPlus1z) 377 Builder.defineMacro("__cplusplus", "201406L"); 378 // C++1y [cpp.predefined]p1: 379 // The name __cplusplus is defined to the value 201402L when compiling a 380 // C++ translation unit. 381 else if (LangOpts.CPlusPlus14) 382 Builder.defineMacro("__cplusplus", "201402L"); 383 // C++11 [cpp.predefined]p1: 384 // The name __cplusplus is defined to the value 201103L when compiling a 385 // C++ translation unit. 386 else if (LangOpts.CPlusPlus11) 387 Builder.defineMacro("__cplusplus", "201103L"); 388 // C++03 [cpp.predefined]p1: 389 // The name __cplusplus is defined to the value 199711L when compiling a 390 // C++ translation unit. 391 else 392 Builder.defineMacro("__cplusplus", "199711L"); 393 } 394 395 // In C11 these are environment macros. In C++11 they are only defined 396 // as part of <cuchar>. To prevent breakage when mixing C and C++ 397 // code, define these macros unconditionally. We can define them 398 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 399 // and 32-bit character literals. 400 Builder.defineMacro("__STDC_UTF_16__", "1"); 401 Builder.defineMacro("__STDC_UTF_32__", "1"); 402 403 if (LangOpts.ObjC1) 404 Builder.defineMacro("__OBJC__"); 405 406 // Not "standard" per se, but available even with the -undef flag. 407 if (LangOpts.AsmPreprocessor) 408 Builder.defineMacro("__ASSEMBLER__"); 409 } 410 411 /// Initialize the predefined C++ language feature test macros defined in 412 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 413 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 414 MacroBuilder &Builder) { 415 // C++98 features. 416 if (LangOpts.RTTI) 417 Builder.defineMacro("__cpp_rtti", "199711"); 418 if (LangOpts.CXXExceptions) 419 Builder.defineMacro("__cpp_exceptions", "199711"); 420 421 // C++11 features. 422 if (LangOpts.CPlusPlus11) { 423 Builder.defineMacro("__cpp_unicode_characters", "200704"); 424 Builder.defineMacro("__cpp_raw_strings", "200710"); 425 Builder.defineMacro("__cpp_unicode_literals", "200710"); 426 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 427 Builder.defineMacro("__cpp_lambdas", "200907"); 428 Builder.defineMacro("__cpp_constexpr", 429 LangOpts.CPlusPlus14 ? "201304" : "200704"); 430 Builder.defineMacro("__cpp_range_based_for", "200907"); 431 Builder.defineMacro("__cpp_static_assert", "200410"); 432 Builder.defineMacro("__cpp_decltype", "200707"); 433 Builder.defineMacro("__cpp_attributes", "200809"); 434 Builder.defineMacro("__cpp_rvalue_references", "200610"); 435 Builder.defineMacro("__cpp_variadic_templates", "200704"); 436 Builder.defineMacro("__cpp_initializer_lists", "200806"); 437 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 438 Builder.defineMacro("__cpp_nsdmi", "200809"); 439 Builder.defineMacro("__cpp_inheriting_constructors", "200802"); 440 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 441 Builder.defineMacro("__cpp_alias_templates", "200704"); 442 } 443 444 // C++14 features. 445 if (LangOpts.CPlusPlus14) { 446 Builder.defineMacro("__cpp_binary_literals", "201304"); 447 Builder.defineMacro("__cpp_digit_separators", "201309"); 448 Builder.defineMacro("__cpp_init_captures", "201304"); 449 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 450 Builder.defineMacro("__cpp_decltype_auto", "201304"); 451 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 452 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 453 Builder.defineMacro("__cpp_variable_templates", "201304"); 454 } 455 if (LangOpts.SizedDeallocation) 456 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 457 if (LangOpts.ConceptsTS) 458 Builder.defineMacro("__cpp_experimental_concepts", "1"); 459 } 460 461 static void InitializePredefinedMacros(const TargetInfo &TI, 462 const LangOptions &LangOpts, 463 const FrontendOptions &FEOpts, 464 MacroBuilder &Builder) { 465 // Compiler version introspection macros. 466 Builder.defineMacro("__llvm__"); // LLVM Backend 467 Builder.defineMacro("__clang__"); // Clang Frontend 468 #define TOSTR2(X) #X 469 #define TOSTR(X) TOSTR2(X) 470 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 471 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 472 #ifdef CLANG_VERSION_PATCHLEVEL 473 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 474 #else 475 Builder.defineMacro("__clang_patchlevel__", "0"); 476 #endif 477 Builder.defineMacro("__clang_version__", 478 "\"" CLANG_VERSION_STRING " " 479 + getClangFullRepositoryVersion() + "\""); 480 #undef TOSTR 481 #undef TOSTR2 482 if (!LangOpts.MSVCCompat) { 483 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 484 // not compiling for MSVC compatibility 485 Builder.defineMacro("__GNUC_MINOR__", "2"); 486 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 487 Builder.defineMacro("__GNUC__", "4"); 488 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 489 } 490 491 // Define macros for the C11 / C++11 memory orderings 492 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 493 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 494 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 495 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 496 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 497 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 498 499 // Support for #pragma redefine_extname (Sun compatibility) 500 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 501 502 // As sad as it is, enough software depends on the __VERSION__ for version 503 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 504 // compatibility with) first. 505 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 506 Twine(getClangFullCPPVersion()) + "\""); 507 508 // Initialize language-specific preprocessor defines. 509 510 // Standard conforming mode? 511 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 512 Builder.defineMacro("__STRICT_ANSI__"); 513 514 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 515 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 516 517 if (LangOpts.ObjC1) { 518 if (LangOpts.ObjCRuntime.isNonFragile()) { 519 Builder.defineMacro("__OBJC2__"); 520 521 if (LangOpts.ObjCExceptions) 522 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 523 } 524 525 if (LangOpts.getGC() != LangOptions::NonGC) 526 Builder.defineMacro("__OBJC_GC__"); 527 528 if (LangOpts.ObjCRuntime.isNeXTFamily()) 529 Builder.defineMacro("__NEXT_RUNTIME__"); 530 531 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 532 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 533 534 unsigned minor = 0; 535 if (tuple.getMinor().hasValue()) 536 minor = tuple.getMinor().getValue(); 537 538 unsigned subminor = 0; 539 if (tuple.getSubminor().hasValue()) 540 subminor = tuple.getSubminor().getValue(); 541 542 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 543 Twine(tuple.getMajor() * 10000 + minor * 100 + 544 subminor)); 545 } 546 547 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 548 Builder.defineMacro("IBOutletCollection(ClassName)", 549 "__attribute__((iboutletcollection(ClassName)))"); 550 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 551 Builder.defineMacro("IBInspectable", ""); 552 Builder.defineMacro("IB_DESIGNABLE", ""); 553 } 554 555 if (LangOpts.CPlusPlus) 556 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 557 558 // darwin_constant_cfstrings controls this. This is also dependent 559 // on other things like the runtime I believe. This is set even for C code. 560 if (!LangOpts.NoConstantCFStrings) 561 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 562 563 if (LangOpts.ObjC2) 564 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 565 566 if (LangOpts.PascalStrings) 567 Builder.defineMacro("__PASCAL_STRINGS__"); 568 569 if (LangOpts.Blocks) { 570 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 571 Builder.defineMacro("__BLOCKS__"); 572 } 573 574 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 575 Builder.defineMacro("__EXCEPTIONS"); 576 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 577 Builder.defineMacro("__GXX_RTTI"); 578 if (LangOpts.SjLjExceptions) 579 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 580 581 if (LangOpts.Deprecated) 582 Builder.defineMacro("__DEPRECATED"); 583 584 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 585 Builder.defineMacro("__GNUG__", "4"); 586 Builder.defineMacro("__GXX_WEAK__"); 587 Builder.defineMacro("__private_extern__", "extern"); 588 } 589 590 if (LangOpts.MicrosoftExt) { 591 if (LangOpts.WChar) { 592 // wchar_t supported as a keyword. 593 Builder.defineMacro("_WCHAR_T_DEFINED"); 594 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 595 } 596 } 597 598 if (LangOpts.Optimize) 599 Builder.defineMacro("__OPTIMIZE__"); 600 if (LangOpts.OptimizeSize) 601 Builder.defineMacro("__OPTIMIZE_SIZE__"); 602 603 if (LangOpts.FastMath) 604 Builder.defineMacro("__FAST_MATH__"); 605 606 // Initialize target-specific preprocessor defines. 607 608 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 609 // to the macro __BYTE_ORDER (no trailing underscores) 610 // from glibc's <endian.h> header. 611 // We don't support the PDP-11 as a target, but include 612 // the define so it can still be compared against. 613 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 614 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 615 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 616 if (TI.isBigEndian()) { 617 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 618 Builder.defineMacro("__BIG_ENDIAN__"); 619 } else { 620 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 621 Builder.defineMacro("__LITTLE_ENDIAN__"); 622 } 623 624 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 625 && TI.getIntWidth() == 32) { 626 Builder.defineMacro("_LP64"); 627 Builder.defineMacro("__LP64__"); 628 } 629 630 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 631 && TI.getIntWidth() == 32) { 632 Builder.defineMacro("_ILP32"); 633 Builder.defineMacro("__ILP32__"); 634 } 635 636 // Define type sizing macros based on the target properties. 637 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 638 Builder.defineMacro("__CHAR_BIT__", "8"); 639 640 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 641 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 642 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 643 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 644 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 645 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 646 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 647 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 648 649 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 650 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 651 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 652 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 653 654 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 655 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 656 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 657 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 658 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 659 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 660 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 661 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 662 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 663 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 664 DefineTypeSizeof("__SIZEOF_SIZE_T__", 665 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 666 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 667 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 668 DefineTypeSizeof("__SIZEOF_WINT_T__", 669 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 670 if (TI.hasInt128Type()) 671 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 672 673 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 674 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 675 Builder.defineMacro("__INTMAX_C_SUFFIX__", 676 TI.getTypeConstantSuffix(TI.getIntMaxType())); 677 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 678 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 679 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 680 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 681 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 682 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 683 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 684 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 685 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 686 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 687 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 688 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 689 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 690 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 691 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 692 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 693 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 694 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 695 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 696 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 697 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 698 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 699 700 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 701 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 702 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 703 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 704 705 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 706 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 707 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 708 709 // Define a __POINTER_WIDTH__ macro for stdint.h. 710 Builder.defineMacro("__POINTER_WIDTH__", 711 Twine((int)TI.getPointerWidth(0))); 712 713 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 714 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 715 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 716 717 if (!LangOpts.CharIsSigned) 718 Builder.defineMacro("__CHAR_UNSIGNED__"); 719 720 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 721 Builder.defineMacro("__WCHAR_UNSIGNED__"); 722 723 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 724 Builder.defineMacro("__WINT_UNSIGNED__"); 725 726 // Define exact-width integer types for stdint.h 727 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 728 729 if (TI.getShortWidth() > TI.getCharWidth()) 730 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 731 732 if (TI.getIntWidth() > TI.getShortWidth()) 733 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 734 735 if (TI.getLongWidth() > TI.getIntWidth()) 736 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 737 738 if (TI.getLongLongWidth() > TI.getLongWidth()) 739 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 740 741 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 742 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 743 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 744 745 if (TI.getShortWidth() > TI.getCharWidth()) { 746 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 747 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 748 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 749 } 750 751 if (TI.getIntWidth() > TI.getShortWidth()) { 752 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 753 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 754 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 755 } 756 757 if (TI.getLongWidth() > TI.getIntWidth()) { 758 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 759 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 760 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 761 } 762 763 if (TI.getLongLongWidth() > TI.getLongWidth()) { 764 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 765 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 766 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 767 } 768 769 DefineLeastWidthIntType(8, true, TI, Builder); 770 DefineLeastWidthIntType(8, false, TI, Builder); 771 DefineLeastWidthIntType(16, true, TI, Builder); 772 DefineLeastWidthIntType(16, false, TI, Builder); 773 DefineLeastWidthIntType(32, true, TI, Builder); 774 DefineLeastWidthIntType(32, false, TI, Builder); 775 DefineLeastWidthIntType(64, true, TI, Builder); 776 DefineLeastWidthIntType(64, false, TI, Builder); 777 778 DefineFastIntType(8, true, TI, Builder); 779 DefineFastIntType(8, false, TI, Builder); 780 DefineFastIntType(16, true, TI, Builder); 781 DefineFastIntType(16, false, TI, Builder); 782 DefineFastIntType(32, true, TI, Builder); 783 DefineFastIntType(32, false, TI, Builder); 784 DefineFastIntType(64, true, TI, Builder); 785 DefineFastIntType(64, false, TI, Builder); 786 787 if (const char *Prefix = TI.getUserLabelPrefix()) 788 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix); 789 790 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 791 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 792 else 793 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 794 795 if (!LangOpts.MSVCCompat) { 796 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 797 Builder.defineMacro("__GNUC_GNU_INLINE__"); 798 else 799 Builder.defineMacro("__GNUC_STDC_INLINE__"); 800 801 // The value written by __atomic_test_and_set. 802 // FIXME: This is target-dependent. 803 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 804 805 // Used by libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 806 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 807 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 808 Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \ 809 getLockFreeValue(TI.get##Type##Width(), \ 810 TI.get##Type##Align(), \ 811 InlineWidthBits)); 812 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 813 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 814 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 815 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 816 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 817 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 818 DEFINE_LOCK_FREE_MACRO(INT, Int); 819 DEFINE_LOCK_FREE_MACRO(LONG, Long); 820 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 821 Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE", 822 getLockFreeValue(TI.getPointerWidth(0), 823 TI.getPointerAlign(0), 824 InlineWidthBits)); 825 #undef DEFINE_LOCK_FREE_MACRO 826 } 827 828 if (LangOpts.NoInlineDefine) 829 Builder.defineMacro("__NO_INLINE__"); 830 831 if (unsigned PICLevel = LangOpts.PICLevel) { 832 Builder.defineMacro("__PIC__", Twine(PICLevel)); 833 Builder.defineMacro("__pic__", Twine(PICLevel)); 834 } 835 if (unsigned PIELevel = LangOpts.PIELevel) { 836 Builder.defineMacro("__PIE__", Twine(PIELevel)); 837 Builder.defineMacro("__pie__", Twine(PIELevel)); 838 } 839 840 // Macros to control C99 numerics and <float.h> 841 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 842 Builder.defineMacro("__FLT_RADIX__", "2"); 843 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 844 845 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 846 Builder.defineMacro("__SSP__"); 847 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 848 Builder.defineMacro("__SSP_STRONG__", "2"); 849 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 850 Builder.defineMacro("__SSP_ALL__", "3"); 851 852 if (FEOpts.ProgramAction == frontend::RewriteObjC) 853 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 854 855 // Define a macro that exists only when using the static analyzer. 856 if (FEOpts.ProgramAction == frontend::RunAnalysis) 857 Builder.defineMacro("__clang_analyzer__"); 858 859 if (LangOpts.FastRelaxedMath) 860 Builder.defineMacro("__FAST_RELAXED_MATH__"); 861 862 if (LangOpts.ObjCAutoRefCount) { 863 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 864 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 865 Builder.defineMacro("__autoreleasing", 866 "__attribute__((objc_ownership(autoreleasing)))"); 867 Builder.defineMacro("__unsafe_unretained", 868 "__attribute__((objc_ownership(none)))"); 869 } 870 871 // On Darwin, there are __double_underscored variants of the type 872 // nullability qualifiers. 873 if (TI.getTriple().isOSDarwin()) { 874 Builder.defineMacro("__nonnull", "_Nonnull"); 875 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 876 Builder.defineMacro("__nullable", "_Nullable"); 877 } 878 879 // OpenMP definition 880 if (LangOpts.OpenMP) { 881 // OpenMP 2.2: 882 // In implementations that support a preprocessor, the _OPENMP 883 // macro name is defined to have the decimal value yyyymm where 884 // yyyy and mm are the year and the month designations of the 885 // version of the OpenMP API that the implementation support. 886 Builder.defineMacro("_OPENMP", "201307"); 887 } 888 889 // CUDA device path compilaton 890 if (LangOpts.CUDAIsDevice) { 891 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 892 // backend's target defines. 893 Builder.defineMacro("__CUDA_ARCH__"); 894 } 895 896 // Get other target #defines. 897 TI.getTargetDefines(LangOpts, Builder); 898 } 899 900 /// InitializePreprocessor - Initialize the preprocessor getting it and the 901 /// environment ready to process a single file. This returns true on error. 902 /// 903 void clang::InitializePreprocessor( 904 Preprocessor &PP, const PreprocessorOptions &InitOpts, 905 const PCHContainerReader &PCHContainerRdr, 906 const FrontendOptions &FEOpts) { 907 const LangOptions &LangOpts = PP.getLangOpts(); 908 std::string PredefineBuffer; 909 PredefineBuffer.reserve(4080); 910 llvm::raw_string_ostream Predefines(PredefineBuffer); 911 MacroBuilder Builder(Predefines); 912 913 // Emit line markers for various builtin sections of the file. We don't do 914 // this in asm preprocessor mode, because "# 4" is not a line marker directive 915 // in this mode. 916 if (!PP.getLangOpts().AsmPreprocessor) 917 Builder.append("# 1 \"<built-in>\" 3"); 918 919 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 920 if (InitOpts.UsePredefines) { 921 if (LangOpts.CUDA && PP.getAuxTargetInfo()) 922 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 923 Builder); 924 925 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 926 927 // Install definitions to make Objective-C++ ARC work well with various 928 // C++ Standard Library implementations. 929 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && LangOpts.ObjCAutoRefCount) { 930 switch (InitOpts.ObjCXXARCStandardLibrary) { 931 case ARCXX_nolib: 932 case ARCXX_libcxx: 933 break; 934 935 case ARCXX_libstdcxx: 936 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 937 break; 938 } 939 } 940 } 941 942 // Even with predefines off, some macros are still predefined. 943 // These should all be defined in the preprocessor according to the 944 // current language configuration. 945 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 946 FEOpts, Builder); 947 948 // Add on the predefines from the driver. Wrap in a #line directive to report 949 // that they come from the command line. 950 if (!PP.getLangOpts().AsmPreprocessor) 951 Builder.append("# 1 \"<command line>\" 1"); 952 953 // Process #define's and #undef's in the order they are given. 954 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 955 if (InitOpts.Macros[i].second) // isUndef 956 Builder.undefineMacro(InitOpts.Macros[i].first); 957 else 958 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 959 PP.getDiagnostics()); 960 } 961 962 // If -imacros are specified, include them now. These are processed before 963 // any -include directives. 964 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 965 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 966 967 // Process -include-pch/-include-pth directives. 968 if (!InitOpts.ImplicitPCHInclude.empty()) 969 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 970 InitOpts.ImplicitPCHInclude); 971 if (!InitOpts.ImplicitPTHInclude.empty()) 972 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 973 974 // Process -include directives. 975 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 976 const std::string &Path = InitOpts.Includes[i]; 977 AddImplicitInclude(Builder, Path); 978 } 979 980 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 981 if (!PP.getLangOpts().AsmPreprocessor) 982 Builder.append("# 1 \"<built-in>\" 2"); 983 984 // Instruct the preprocessor to skip the preamble. 985 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 986 InitOpts.PrecompiledPreambleBytes.second); 987 988 // Copy PredefinedBuffer into the Preprocessor. 989 PP.setPredefines(Predefines.str()); 990 } 991