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