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