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 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File, 69 FileManager &FileMgr) { 70 Builder.append(Twine("#include \"") + 71 HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\""); 72 } 73 74 static void AddImplicitIncludeMacros(MacroBuilder &Builder, 75 StringRef File, 76 FileManager &FileMgr) { 77 Builder.append(Twine("#__include_macros \"") + 78 HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\""); 79 // Marker token to stop the __include_macros fetch loop. 80 Builder.append("##"); // ##? 81 } 82 83 /// AddImplicitIncludePTH - Add an implicit \#include using the original file 84 /// used to generate a PTH cache. 85 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 86 StringRef ImplicitIncludePTH) { 87 PTHManager *P = PP.getPTHManager(); 88 // Null check 'P' in the corner case where it couldn't be created. 89 const char *OriginalFile = P ? P->getOriginalSourceFile() : nullptr; 90 91 if (!OriginalFile) { 92 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 93 << ImplicitIncludePTH; 94 return; 95 } 96 97 AddImplicitInclude(Builder, OriginalFile, PP.getFileManager()); 98 } 99 100 /// \brief Add an implicit \#include using the original file used to generate 101 /// a PCH file. 102 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 103 StringRef ImplicitIncludePCH) { 104 std::string OriginalFile = 105 ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(), 106 PP.getDiagnostics()); 107 if (OriginalFile.empty()) 108 return; 109 110 AddImplicitInclude(Builder, OriginalFile, PP.getFileManager()); 111 } 112 113 /// PickFP - This is used to pick a value based on the FP semantics of the 114 /// specified FP model. 115 template <typename T> 116 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, 117 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 118 T IEEEQuadVal) { 119 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) 120 return IEEESingleVal; 121 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) 122 return IEEEDoubleVal; 123 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) 124 return X87DoubleExtendedVal; 125 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) 126 return PPCDoubleDoubleVal; 127 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); 128 return IEEEQuadVal; 129 } 130 131 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 132 const llvm::fltSemantics *Sem, StringRef Ext) { 133 const char *DenormMin, *Epsilon, *Max, *Min; 134 DenormMin = PickFP(Sem, "1.40129846e-45", "4.9406564584124654e-324", 135 "3.64519953188247460253e-4951", 136 "4.94065645841246544176568792868221e-324", 137 "6.47517511943802511092443895822764655e-4966"); 138 int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 139 Epsilon = PickFP(Sem, "1.19209290e-7", "2.2204460492503131e-16", 140 "1.08420217248550443401e-19", 141 "4.94065645841246544176568792868221e-324", 142 "1.92592994438723585305597794258492732e-34"); 143 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 144 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 145 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 146 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 147 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 148 Min = PickFP(Sem, "1.17549435e-38", "2.2250738585072014e-308", 149 "3.36210314311209350626e-4932", 150 "2.00416836000897277799610805135016e-292", 151 "3.36210314311209350626267781732175260e-4932"); 152 Max = PickFP(Sem, "3.40282347e+38", "1.7976931348623157e+308", 153 "1.18973149535723176502e+4932", 154 "1.79769313486231580793728971405301e+308", 155 "1.18973149535723176508575932662800702e+4932"); 156 157 SmallString<32> DefPrefix; 158 DefPrefix = "__"; 159 DefPrefix += Prefix; 160 DefPrefix += "_"; 161 162 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); 163 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 164 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 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.CPlusPlus1y) 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++11 features. 416 if (LangOpts.CPlusPlus11) { 417 Builder.defineMacro("__cpp_unicode_characters", "200704"); 418 Builder.defineMacro("__cpp_raw_strings", "200710"); 419 Builder.defineMacro("__cpp_unicode_literals", "200710"); 420 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 421 Builder.defineMacro("__cpp_lambdas", "200907"); 422 Builder.defineMacro("__cpp_constexpr", 423 LangOpts.CPlusPlus1y ? "201304" : "200704"); 424 Builder.defineMacro("__cpp_static_assert", "200410"); 425 Builder.defineMacro("__cpp_decltype", "200707"); 426 Builder.defineMacro("__cpp_attributes", "200809"); 427 Builder.defineMacro("__cpp_rvalue_references", "200610"); 428 Builder.defineMacro("__cpp_variadic_templates", "200704"); 429 } 430 431 // C++14 features. 432 if (LangOpts.CPlusPlus1y) { 433 Builder.defineMacro("__cpp_binary_literals", "201304"); 434 Builder.defineMacro("__cpp_init_captures", "201304"); 435 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 436 Builder.defineMacro("__cpp_decltype_auto", "201304"); 437 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 438 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 439 Builder.defineMacro("__cpp_variable_templates", "201304"); 440 } 441 } 442 443 static void InitializePredefinedMacros(const TargetInfo &TI, 444 const LangOptions &LangOpts, 445 const FrontendOptions &FEOpts, 446 MacroBuilder &Builder) { 447 // Compiler version introspection macros. 448 Builder.defineMacro("__llvm__"); // LLVM Backend 449 Builder.defineMacro("__clang__"); // Clang Frontend 450 #define TOSTR2(X) #X 451 #define TOSTR(X) TOSTR2(X) 452 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 453 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 454 #ifdef CLANG_VERSION_PATCHLEVEL 455 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 456 #else 457 Builder.defineMacro("__clang_patchlevel__", "0"); 458 #endif 459 Builder.defineMacro("__clang_version__", 460 "\"" CLANG_VERSION_STRING " " 461 + getClangFullRepositoryVersion() + "\""); 462 #undef TOSTR 463 #undef TOSTR2 464 if (!LangOpts.MSVCCompat) { 465 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 466 // not compiling for MSVC compatibility 467 Builder.defineMacro("__GNUC_MINOR__", "2"); 468 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 469 Builder.defineMacro("__GNUC__", "4"); 470 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 471 } 472 473 // Define macros for the C11 / C++11 memory orderings 474 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 475 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 476 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 477 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 478 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 479 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 480 481 // Support for #pragma redefine_extname (Sun compatibility) 482 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 483 484 // As sad as it is, enough software depends on the __VERSION__ for version 485 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 486 // compatibility with) first. 487 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 488 Twine(getClangFullCPPVersion()) + "\""); 489 490 // Initialize language-specific preprocessor defines. 491 492 // Standard conforming mode? 493 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 494 Builder.defineMacro("__STRICT_ANSI__"); 495 496 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 497 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 498 499 if (LangOpts.ObjC1) { 500 if (LangOpts.ObjCRuntime.isNonFragile()) { 501 Builder.defineMacro("__OBJC2__"); 502 503 if (LangOpts.ObjCExceptions) 504 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 505 } 506 507 if (LangOpts.getGC() != LangOptions::NonGC) 508 Builder.defineMacro("__OBJC_GC__"); 509 510 if (LangOpts.ObjCRuntime.isNeXTFamily()) 511 Builder.defineMacro("__NEXT_RUNTIME__"); 512 513 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 514 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 515 516 unsigned minor = 0; 517 if (tuple.getMinor().hasValue()) 518 minor = tuple.getMinor().getValue(); 519 520 unsigned subminor = 0; 521 if (tuple.getSubminor().hasValue()) 522 subminor = tuple.getSubminor().getValue(); 523 524 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 525 Twine(tuple.getMajor() * 10000 + minor * 100 + 526 subminor)); 527 } 528 529 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 530 Builder.defineMacro("IBOutletCollection(ClassName)", 531 "__attribute__((iboutletcollection(ClassName)))"); 532 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 533 Builder.defineMacro("IBInspectable", ""); 534 Builder.defineMacro("IB_DESIGNABLE", ""); 535 } 536 537 if (LangOpts.CPlusPlus) 538 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 539 540 // darwin_constant_cfstrings controls this. This is also dependent 541 // on other things like the runtime I believe. This is set even for C code. 542 if (!LangOpts.NoConstantCFStrings) 543 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 544 545 if (LangOpts.ObjC2) 546 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 547 548 if (LangOpts.PascalStrings) 549 Builder.defineMacro("__PASCAL_STRINGS__"); 550 551 if (LangOpts.Blocks) { 552 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 553 Builder.defineMacro("__BLOCKS__"); 554 } 555 556 if (!LangOpts.MSVCCompat && LangOpts.CXXExceptions) 557 Builder.defineMacro("__EXCEPTIONS"); 558 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 559 Builder.defineMacro("__GXX_RTTI"); 560 if (LangOpts.SjLjExceptions) 561 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 562 563 if (LangOpts.Deprecated) 564 Builder.defineMacro("__DEPRECATED"); 565 566 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 567 Builder.defineMacro("__GNUG__", "4"); 568 Builder.defineMacro("__GXX_WEAK__"); 569 Builder.defineMacro("__private_extern__", "extern"); 570 } 571 572 if (LangOpts.MicrosoftExt) { 573 if (LangOpts.WChar) { 574 // wchar_t supported as a keyword. 575 Builder.defineMacro("_WCHAR_T_DEFINED"); 576 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 577 } 578 } 579 580 if (LangOpts.Optimize) 581 Builder.defineMacro("__OPTIMIZE__"); 582 if (LangOpts.OptimizeSize) 583 Builder.defineMacro("__OPTIMIZE_SIZE__"); 584 585 if (LangOpts.FastMath) 586 Builder.defineMacro("__FAST_MATH__"); 587 588 // Initialize target-specific preprocessor defines. 589 590 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 591 // to the macro __BYTE_ORDER (no trailing underscores) 592 // from glibc's <endian.h> header. 593 // We don't support the PDP-11 as a target, but include 594 // the define so it can still be compared against. 595 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 596 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 597 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 598 if (TI.isBigEndian()) { 599 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 600 Builder.defineMacro("__BIG_ENDIAN__"); 601 } else { 602 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 603 Builder.defineMacro("__LITTLE_ENDIAN__"); 604 } 605 606 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 607 && TI.getIntWidth() == 32) { 608 Builder.defineMacro("_LP64"); 609 Builder.defineMacro("__LP64__"); 610 } 611 612 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 613 && TI.getIntWidth() == 32) { 614 Builder.defineMacro("_ILP32"); 615 Builder.defineMacro("__ILP32__"); 616 } 617 618 // Define type sizing macros based on the target properties. 619 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 620 Builder.defineMacro("__CHAR_BIT__", "8"); 621 622 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 623 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 624 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 625 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 626 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 627 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 628 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 629 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 630 631 if (!LangOpts.MSVCCompat) { 632 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 633 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 634 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 635 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 636 } 637 638 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 639 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 640 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 641 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 642 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 643 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 644 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 645 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 646 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 647 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 648 DefineTypeSizeof("__SIZEOF_SIZE_T__", 649 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 650 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 651 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 652 DefineTypeSizeof("__SIZEOF_WINT_T__", 653 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 654 if (TI.hasInt128Type()) 655 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 656 657 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 658 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 659 Builder.defineMacro("__INTMAX_C_SUFFIX__", 660 TI.getTypeConstantSuffix(TI.getIntMaxType())); 661 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 662 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 663 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 664 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 665 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 666 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 667 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 668 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 669 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 670 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 671 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 672 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 673 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 674 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 675 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 676 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 677 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 678 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 679 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 680 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 681 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 682 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 683 684 if (!LangOpts.MSVCCompat) { 685 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 686 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 687 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 688 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 689 } 690 691 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 692 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 693 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 694 695 // Define a __POINTER_WIDTH__ macro for stdint.h. 696 Builder.defineMacro("__POINTER_WIDTH__", 697 Twine((int)TI.getPointerWidth(0))); 698 699 if (!LangOpts.CharIsSigned) 700 Builder.defineMacro("__CHAR_UNSIGNED__"); 701 702 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 703 Builder.defineMacro("__WCHAR_UNSIGNED__"); 704 705 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 706 Builder.defineMacro("__WINT_UNSIGNED__"); 707 708 // Define exact-width integer types for stdint.h 709 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 710 711 if (TI.getShortWidth() > TI.getCharWidth()) 712 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 713 714 if (TI.getIntWidth() > TI.getShortWidth()) 715 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 716 717 if (TI.getLongWidth() > TI.getIntWidth()) 718 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 719 720 if (TI.getLongLongWidth() > TI.getLongWidth()) 721 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 722 723 if (!LangOpts.MSVCCompat) { 724 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 725 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 726 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 727 728 if (TI.getShortWidth() > TI.getCharWidth()) { 729 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 730 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 731 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 732 } 733 734 if (TI.getIntWidth() > TI.getShortWidth()) { 735 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 736 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 737 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 738 } 739 740 if (TI.getLongWidth() > TI.getIntWidth()) { 741 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 742 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 743 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 744 } 745 746 if (TI.getLongLongWidth() > TI.getLongWidth()) { 747 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 748 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 749 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 750 } 751 752 DefineLeastWidthIntType(8, true, TI, Builder); 753 DefineLeastWidthIntType(8, false, TI, Builder); 754 DefineLeastWidthIntType(16, true, TI, Builder); 755 DefineLeastWidthIntType(16, false, TI, Builder); 756 DefineLeastWidthIntType(32, true, TI, Builder); 757 DefineLeastWidthIntType(32, false, TI, Builder); 758 DefineLeastWidthIntType(64, true, TI, Builder); 759 DefineLeastWidthIntType(64, false, TI, Builder); 760 761 DefineFastIntType(8, true, TI, Builder); 762 DefineFastIntType(8, false, TI, Builder); 763 DefineFastIntType(16, true, TI, Builder); 764 DefineFastIntType(16, false, TI, Builder); 765 DefineFastIntType(32, true, TI, Builder); 766 DefineFastIntType(32, false, TI, Builder); 767 DefineFastIntType(64, true, TI, Builder); 768 DefineFastIntType(64, false, TI, Builder); 769 } 770 771 if (const char *Prefix = TI.getUserLabelPrefix()) 772 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix); 773 774 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 775 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 776 else 777 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 778 779 if (!LangOpts.MSVCCompat) { 780 if (LangOpts.GNUInline) 781 Builder.defineMacro("__GNUC_GNU_INLINE__"); 782 else 783 Builder.defineMacro("__GNUC_STDC_INLINE__"); 784 785 // The value written by __atomic_test_and_set. 786 // FIXME: This is target-dependent. 787 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 788 789 // Used by libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 790 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 791 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 792 Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \ 793 getLockFreeValue(TI.get##Type##Width(), \ 794 TI.get##Type##Align(), \ 795 InlineWidthBits)); 796 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 797 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 798 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 799 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 800 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 801 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 802 DEFINE_LOCK_FREE_MACRO(INT, Int); 803 DEFINE_LOCK_FREE_MACRO(LONG, Long); 804 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 805 Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE", 806 getLockFreeValue(TI.getPointerWidth(0), 807 TI.getPointerAlign(0), 808 InlineWidthBits)); 809 #undef DEFINE_LOCK_FREE_MACRO 810 } 811 812 if (LangOpts.NoInlineDefine) 813 Builder.defineMacro("__NO_INLINE__"); 814 815 if (unsigned PICLevel = LangOpts.PICLevel) { 816 Builder.defineMacro("__PIC__", Twine(PICLevel)); 817 Builder.defineMacro("__pic__", Twine(PICLevel)); 818 } 819 if (unsigned PIELevel = LangOpts.PIELevel) { 820 Builder.defineMacro("__PIE__", Twine(PIELevel)); 821 Builder.defineMacro("__pie__", Twine(PIELevel)); 822 } 823 824 // Macros to control C99 numerics and <float.h> 825 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 826 Builder.defineMacro("__FLT_RADIX__", "2"); 827 int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36); 828 Builder.defineMacro("__DECIMAL_DIG__", Twine(Dig)); 829 830 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 831 Builder.defineMacro("__SSP__"); 832 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 833 Builder.defineMacro("__SSP_STRONG__", "2"); 834 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 835 Builder.defineMacro("__SSP_ALL__", "3"); 836 837 if (FEOpts.ProgramAction == frontend::RewriteObjC) 838 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 839 840 // Define a macro that exists only when using the static analyzer. 841 if (FEOpts.ProgramAction == frontend::RunAnalysis) 842 Builder.defineMacro("__clang_analyzer__"); 843 844 if (LangOpts.FastRelaxedMath) 845 Builder.defineMacro("__FAST_RELAXED_MATH__"); 846 847 if (LangOpts.ObjCAutoRefCount) { 848 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 849 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 850 Builder.defineMacro("__autoreleasing", 851 "__attribute__((objc_ownership(autoreleasing)))"); 852 Builder.defineMacro("__unsafe_unretained", 853 "__attribute__((objc_ownership(none)))"); 854 } 855 856 // OpenMP definition 857 if (LangOpts.OpenMP) { 858 // OpenMP 2.2: 859 // In implementations that support a preprocessor, the _OPENMP 860 // macro name is defined to have the decimal value yyyymm where 861 // yyyy and mm are the year and the month designations of the 862 // version of the OpenMP API that the implementation support. 863 Builder.defineMacro("_OPENMP", "201307"); 864 } 865 866 // Get other target #defines. 867 TI.getTargetDefines(LangOpts, Builder); 868 } 869 870 /// InitializePreprocessor - Initialize the preprocessor getting it and the 871 /// environment ready to process a single file. This returns true on error. 872 /// 873 void clang::InitializePreprocessor(Preprocessor &PP, 874 const PreprocessorOptions &InitOpts, 875 const FrontendOptions &FEOpts) { 876 const LangOptions &LangOpts = PP.getLangOpts(); 877 std::string PredefineBuffer; 878 PredefineBuffer.reserve(4080); 879 llvm::raw_string_ostream Predefines(PredefineBuffer); 880 MacroBuilder Builder(Predefines); 881 882 // Emit line markers for various builtin sections of the file. We don't do 883 // this in asm preprocessor mode, because "# 4" is not a line marker directive 884 // in this mode. 885 if (!PP.getLangOpts().AsmPreprocessor) 886 Builder.append("# 1 \"<built-in>\" 3"); 887 888 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 889 if (InitOpts.UsePredefines) { 890 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 891 892 // Install definitions to make Objective-C++ ARC work well with various 893 // C++ Standard Library implementations. 894 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && LangOpts.ObjCAutoRefCount) { 895 switch (InitOpts.ObjCXXARCStandardLibrary) { 896 case ARCXX_nolib: 897 case ARCXX_libcxx: 898 break; 899 900 case ARCXX_libstdcxx: 901 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 902 break; 903 } 904 } 905 } 906 907 // Even with predefines off, some macros are still predefined. 908 // These should all be defined in the preprocessor according to the 909 // current language configuration. 910 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 911 FEOpts, Builder); 912 913 // Add on the predefines from the driver. Wrap in a #line directive to report 914 // that they come from the command line. 915 if (!PP.getLangOpts().AsmPreprocessor) 916 Builder.append("# 1 \"<command line>\" 1"); 917 918 // Process #define's and #undef's in the order they are given. 919 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 920 if (InitOpts.Macros[i].second) // isUndef 921 Builder.undefineMacro(InitOpts.Macros[i].first); 922 else 923 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 924 PP.getDiagnostics()); 925 } 926 927 // If -imacros are specified, include them now. These are processed before 928 // any -include directives. 929 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 930 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i], 931 PP.getFileManager()); 932 933 // Process -include-pch/-include-pth directives. 934 if (!InitOpts.ImplicitPCHInclude.empty()) 935 AddImplicitIncludePCH(Builder, PP, InitOpts.ImplicitPCHInclude); 936 if (!InitOpts.ImplicitPTHInclude.empty()) 937 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 938 939 // Process -include directives. 940 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 941 const std::string &Path = InitOpts.Includes[i]; 942 AddImplicitInclude(Builder, Path, PP.getFileManager()); 943 } 944 945 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 946 if (!PP.getLangOpts().AsmPreprocessor) 947 Builder.append("# 1 \"<built-in>\" 2"); 948 949 // Instruct the preprocessor to skip the preamble. 950 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 951 InitOpts.PrecompiledPreambleBytes.second); 952 953 // Copy PredefinedBuffer into the Preprocessor. 954 PP.setPredefines(Predefines.str()); 955 } 956