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/TargetInfo.h" 16 #include "clang/Frontend/FrontendDiagnostic.h" 17 #include "clang/Frontend/FrontendOptions.h" 18 #include "clang/Frontend/PreprocessorOptions.h" 19 #include "clang/Lex/Preprocessor.h" 20 #include "clang/Basic/FileManager.h" 21 #include "clang/Basic/SourceManager.h" 22 #include "llvm/ADT/APFloat.h" 23 #include "llvm/Support/MemoryBuffer.h" 24 #include "llvm/System/Path.h" 25 using namespace clang; 26 27 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 28 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 29 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 30 static void DefineBuiltinMacro(MacroBuilder &Builder, llvm::StringRef Macro, 31 Diagnostic &Diags) { 32 std::pair<llvm::StringRef, llvm::StringRef> MacroPair = Macro.split('='); 33 llvm::StringRef MacroName = MacroPair.first; 34 llvm::StringRef MacroBody = MacroPair.second; 35 if (MacroName.size() != Macro.size()) { 36 // Per GCC -D semantics, the macro ends at \n if it exists. 37 llvm::StringRef::size_type End = MacroBody.find_first_of("\n\r"); 38 if (End != llvm::StringRef::npos) 39 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 40 << MacroName; 41 Builder.defineMacro(MacroName, MacroBody.substr(0, End)); 42 } else { 43 // Push "macroname 1". 44 Builder.defineMacro(Macro); 45 } 46 } 47 48 std::string clang::NormalizeDashIncludePath(llvm::StringRef File) { 49 // Implicit include paths should be resolved relative to the current 50 // working directory first, and then use the regular header search 51 // mechanism. The proper way to handle this is to have the 52 // predefines buffer located at the current working directory, but 53 // it has not file entry. For now, workaround this by using an 54 // absolute path if we find the file here, and otherwise letting 55 // header search handle it. 56 llvm::sys::Path Path(File); 57 Path.makeAbsolute(); 58 if (!Path.exists()) 59 Path = File; 60 61 return Lexer::Stringify(Path.str()); 62 } 63 64 /// AddImplicitInclude - Add an implicit #include of the specified file to the 65 /// predefines buffer. 66 static void AddImplicitInclude(MacroBuilder &Builder, llvm::StringRef File) { 67 Builder.append("#include \"" + 68 llvm::Twine(NormalizeDashIncludePath(File)) + "\""); 69 } 70 71 static void AddImplicitIncludeMacros(MacroBuilder &Builder, 72 llvm::StringRef File) { 73 Builder.append("#__include_macros \"" + 74 llvm::Twine(NormalizeDashIncludePath(File)) + "\""); 75 // Marker token to stop the __include_macros fetch loop. 76 Builder.append("##"); // ##? 77 } 78 79 /// AddImplicitIncludePTH - Add an implicit #include using the original file 80 /// used to generate a PTH cache. 81 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 82 llvm::StringRef ImplicitIncludePTH) { 83 PTHManager *P = PP.getPTHManager(); 84 assert(P && "No PTHManager."); 85 const char *OriginalFile = P->getOriginalSourceFile(); 86 87 if (!OriginalFile) { 88 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 89 << ImplicitIncludePTH; 90 return; 91 } 92 93 AddImplicitInclude(Builder, OriginalFile); 94 } 95 96 /// PickFP - This is used to pick a value based on the FP semantics of the 97 /// specified FP model. 98 template <typename T> 99 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, 100 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 101 T IEEEQuadVal) { 102 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) 103 return IEEESingleVal; 104 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) 105 return IEEEDoubleVal; 106 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) 107 return X87DoubleExtendedVal; 108 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) 109 return PPCDoubleDoubleVal; 110 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); 111 return IEEEQuadVal; 112 } 113 114 static void DefineFloatMacros(MacroBuilder &Builder, llvm::StringRef Prefix, 115 const llvm::fltSemantics *Sem) { 116 const char *DenormMin, *Epsilon, *Max, *Min; 117 DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324", 118 "3.64519953188247460253e-4951L", 119 "4.94065645841246544176568792868221e-324L", 120 "6.47517511943802511092443895822764655e-4966L"); 121 int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 122 Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16", 123 "1.08420217248550443401e-19L", 124 "4.94065645841246544176568792868221e-324L", 125 "1.92592994438723585305597794258492732e-34L"); 126 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 127 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 128 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 129 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 130 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 131 Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308", 132 "3.36210314311209350626e-4932L", 133 "2.00416836000897277799610805135016e-292L", 134 "3.36210314311209350626267781732175260e-4932L"); 135 Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308", 136 "1.18973149535723176502e+4932L", 137 "1.79769313486231580793728971405301e+308L", 138 "1.18973149535723176508575932662800702e+4932L"); 139 140 llvm::SmallString<32> DefPrefix; 141 DefPrefix = "__"; 142 DefPrefix += Prefix; 143 DefPrefix += "_"; 144 145 Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin); 146 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 147 Builder.defineMacro(DefPrefix + "DIG__", llvm::Twine(Digits)); 148 Builder.defineMacro(DefPrefix + "EPSILON__", llvm::Twine(Epsilon)); 149 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 150 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 151 Builder.defineMacro(DefPrefix + "MANT_DIG__", llvm::Twine(MantissaDigits)); 152 153 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", llvm::Twine(Max10Exp)); 154 Builder.defineMacro(DefPrefix + "MAX_EXP__", llvm::Twine(MaxExp)); 155 Builder.defineMacro(DefPrefix + "MAX__", llvm::Twine(Max)); 156 157 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+llvm::Twine(Min10Exp)+")"); 158 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+llvm::Twine(MinExp)+")"); 159 Builder.defineMacro(DefPrefix + "MIN__", llvm::Twine(Min)); 160 } 161 162 163 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 164 /// named MacroName with the max value for a type with width 'TypeWidth' a 165 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 166 static void DefineTypeSize(llvm::StringRef MacroName, unsigned TypeWidth, 167 llvm::StringRef ValSuffix, bool isSigned, 168 MacroBuilder& Builder) { 169 long long MaxVal; 170 if (isSigned) 171 MaxVal = (1LL << (TypeWidth - 1)) - 1; 172 else 173 MaxVal = ~0LL >> (64-TypeWidth); 174 175 Builder.defineMacro(MacroName, llvm::Twine(MaxVal) + ValSuffix); 176 } 177 178 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 179 /// the width, suffix, and signedness of the given type 180 static void DefineTypeSize(llvm::StringRef MacroName, TargetInfo::IntType Ty, 181 const TargetInfo &TI, MacroBuilder &Builder) { 182 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 183 TI.isTypeSigned(Ty), Builder); 184 } 185 186 static void DefineType(const llvm::Twine &MacroName, TargetInfo::IntType Ty, 187 MacroBuilder &Builder) { 188 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 189 } 190 191 static void DefineTypeWidth(llvm::StringRef MacroName, TargetInfo::IntType Ty, 192 const TargetInfo &TI, MacroBuilder &Builder) { 193 Builder.defineMacro(MacroName, llvm::Twine(TI.getTypeWidth(Ty))); 194 } 195 196 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 197 const TargetInfo &TI, MacroBuilder &Builder) { 198 int TypeWidth = TI.getTypeWidth(Ty); 199 DefineType("__INT" + llvm::Twine(TypeWidth) + "_TYPE__", Ty, Builder); 200 201 llvm::StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty)); 202 if (!ConstSuffix.empty()) 203 Builder.defineMacro("__INT" + llvm::Twine(TypeWidth) + "_C_SUFFIX__", 204 ConstSuffix); 205 } 206 207 static void InitializePredefinedMacros(const TargetInfo &TI, 208 const LangOptions &LangOpts, 209 const FrontendOptions &FEOpts, 210 MacroBuilder &Builder) { 211 // Compiler version introspection macros. 212 Builder.defineMacro("__llvm__"); // LLVM Backend 213 Builder.defineMacro("__clang__"); // Clang Frontend 214 215 // Currently claim to be compatible with GCC 4.2.1-5621. 216 Builder.defineMacro("__GNUC_MINOR__", "2"); 217 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 218 Builder.defineMacro("__GNUC__", "4"); 219 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 220 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible Clang Compiler\""); 221 222 // Initialize language-specific preprocessor defines. 223 224 // These should all be defined in the preprocessor according to the 225 // current language configuration. 226 if (!LangOpts.Microsoft) 227 Builder.defineMacro("__STDC__"); 228 if (LangOpts.AsmPreprocessor) 229 Builder.defineMacro("__ASSEMBLER__"); 230 231 if (!LangOpts.CPlusPlus) { 232 if (LangOpts.C99) 233 Builder.defineMacro("__STDC_VERSION__", "199901L"); 234 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 235 Builder.defineMacro("__STDC_VERSION__", "199409L"); 236 } 237 238 // Standard conforming mode? 239 if (!LangOpts.GNUMode) 240 Builder.defineMacro("__STRICT_ANSI__"); 241 242 if (LangOpts.CPlusPlus0x) 243 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 244 245 if (LangOpts.Freestanding) 246 Builder.defineMacro("__STDC_HOSTED__", "0"); 247 else 248 Builder.defineMacro("__STDC_HOSTED__"); 249 250 if (LangOpts.ObjC1) { 251 Builder.defineMacro("__OBJC__"); 252 if (LangOpts.ObjCNonFragileABI) { 253 Builder.defineMacro("__OBJC2__"); 254 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 255 } 256 257 if (LangOpts.getGCMode() != LangOptions::NonGC) 258 Builder.defineMacro("__OBJC_GC__"); 259 260 if (LangOpts.NeXTRuntime) 261 Builder.defineMacro("__NEXT_RUNTIME__"); 262 } 263 264 // darwin_constant_cfstrings controls this. This is also dependent 265 // on other things like the runtime I believe. This is set even for C code. 266 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 267 268 if (LangOpts.ObjC2) 269 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 270 271 if (LangOpts.PascalStrings) 272 Builder.defineMacro("__PASCAL_STRINGS__"); 273 274 if (LangOpts.Blocks) { 275 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 276 Builder.defineMacro("__BLOCKS__"); 277 } 278 279 if (LangOpts.Exceptions) 280 Builder.defineMacro("__EXCEPTIONS"); 281 282 if (LangOpts.CPlusPlus) { 283 Builder.defineMacro("__DEPRECATED"); 284 Builder.defineMacro("__GNUG__", "4"); 285 Builder.defineMacro("__GXX_WEAK__"); 286 if (LangOpts.GNUMode) 287 Builder.defineMacro("__cplusplus"); 288 else 289 // C++ [cpp.predefined]p1: 290 // The name_ _cplusplusis defined to the value199711Lwhen compiling a 291 // C++ translation unit. 292 Builder.defineMacro("__cplusplus", "199711L"); 293 Builder.defineMacro("__private_extern__", "extern"); 294 // Ugly hack to work with GNU libstdc++. 295 Builder.defineMacro("_GNU_SOURCE"); 296 } 297 298 if (LangOpts.Microsoft) { 299 // Filter out some microsoft extensions when trying to parse in ms-compat 300 // mode. 301 Builder.defineMacro("__int8", "__INT8_TYPE__"); 302 Builder.defineMacro("__int16", "__INT16_TYPE__"); 303 Builder.defineMacro("__int32", "__INT32_TYPE__"); 304 Builder.defineMacro("__int64", "__INT64_TYPE__"); 305 // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however 306 // VC++ appears to only like __FUNCTION__. 307 Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__"); 308 // Work around some issues with Visual C++ headerws. 309 if (LangOpts.CPlusPlus) { 310 // Since we define wchar_t in C++ mode. 311 Builder.defineMacro("_WCHAR_T_DEFINED"); 312 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 313 // FIXME: This should be temporary until we have a __pragma 314 // solution, to avoid some errors flagged in VC++ headers. 315 Builder.defineMacro("_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES", "0"); 316 } 317 } 318 319 if (LangOpts.Optimize) 320 Builder.defineMacro("__OPTIMIZE__"); 321 if (LangOpts.OptimizeSize) 322 Builder.defineMacro("__OPTIMIZE_SIZE__"); 323 324 // Initialize target-specific preprocessor defines. 325 326 // Define type sizing macros based on the target properties. 327 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 328 Builder.defineMacro("__CHAR_BIT__", "8"); 329 330 DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder); 331 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 332 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 333 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 334 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 335 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 336 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 337 338 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 339 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 340 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 341 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 342 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 343 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 344 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 345 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 346 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 347 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 348 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 349 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 350 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 351 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 352 353 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat()); 354 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat()); 355 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat()); 356 357 // Define a __POINTER_WIDTH__ macro for stdint.h. 358 Builder.defineMacro("__POINTER_WIDTH__", 359 llvm::Twine((int)TI.getPointerWidth(0))); 360 361 if (!LangOpts.CharIsSigned) 362 Builder.defineMacro("__CHAR_UNSIGNED__"); 363 364 // Define exact-width integer types for stdint.h 365 Builder.defineMacro("__INT" + llvm::Twine(TI.getCharWidth()) + "_TYPE__", 366 "char"); 367 368 if (TI.getShortWidth() > TI.getCharWidth()) 369 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 370 371 if (TI.getIntWidth() > TI.getShortWidth()) 372 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 373 374 if (TI.getLongWidth() > TI.getIntWidth()) 375 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 376 377 if (TI.getLongLongWidth() > TI.getLongWidth()) 378 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 379 380 // Add __builtin_va_list typedef. 381 Builder.append(TI.getVAListDeclaration()); 382 383 if (const char *Prefix = TI.getUserLabelPrefix()) 384 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix); 385 386 // Build configuration options. FIXME: these should be controlled by 387 // command line options or something. 388 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 389 390 if (LangOpts.GNUInline) 391 Builder.defineMacro("__GNUC_GNU_INLINE__"); 392 else 393 Builder.defineMacro("__GNUC_STDC_INLINE__"); 394 395 if (LangOpts.NoInline) 396 Builder.defineMacro("__NO_INLINE__"); 397 398 if (unsigned PICLevel = LangOpts.PICLevel) { 399 Builder.defineMacro("__PIC__", llvm::Twine(PICLevel)); 400 Builder.defineMacro("__pic__", llvm::Twine(PICLevel)); 401 } 402 403 // Macros to control C99 numerics and <float.h> 404 Builder.defineMacro("__FLT_EVAL_METHOD__", "0"); 405 Builder.defineMacro("__FLT_RADIX__", "2"); 406 int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36); 407 Builder.defineMacro("__DECIMAL_DIG__", llvm::Twine(Dig)); 408 409 if (LangOpts.getStackProtectorMode() == LangOptions::SSPOn) 410 Builder.defineMacro("__SSP__"); 411 else if (LangOpts.getStackProtectorMode() == LangOptions::SSPReq) 412 Builder.defineMacro("__SSP_ALL__", "2"); 413 414 if (FEOpts.ProgramAction == frontend::RewriteObjC) 415 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 416 // Get other target #defines. 417 TI.getTargetDefines(LangOpts, Builder); 418 } 419 420 // Initialize the remapping of files to alternative contents, e.g., 421 // those specified through other files. 422 static void InitializeFileRemapping(Diagnostic &Diags, 423 SourceManager &SourceMgr, 424 FileManager &FileMgr, 425 const PreprocessorOptions &InitOpts) { 426 // Remap files in the source manager. 427 for (PreprocessorOptions::remapped_file_iterator 428 Remap = InitOpts.remapped_file_begin(), 429 RemapEnd = InitOpts.remapped_file_end(); 430 Remap != RemapEnd; 431 ++Remap) { 432 // Find the file that we're mapping to. 433 const FileEntry *ToFile = FileMgr.getFile(Remap->second); 434 if (!ToFile) { 435 Diags.Report(diag::err_fe_remap_missing_to_file) 436 << Remap->first << Remap->second; 437 continue; 438 } 439 440 // Create the file entry for the file that we're mapping from. 441 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first, 442 ToFile->getSize(), 443 0); 444 if (!FromFile) { 445 Diags.Report(diag::err_fe_remap_missing_from_file) 446 << Remap->first; 447 continue; 448 } 449 450 // Load the contents of the file we're mapping to. 451 std::string ErrorStr; 452 const llvm::MemoryBuffer *Buffer 453 = llvm::MemoryBuffer::getFile(ToFile->getName(), &ErrorStr); 454 if (!Buffer) { 455 Diags.Report(diag::err_fe_error_opening) 456 << Remap->second << ErrorStr; 457 continue; 458 } 459 460 // Override the contents of the "from" file with the contents of 461 // the "to" file. 462 SourceMgr.overrideFileContents(FromFile, Buffer); 463 } 464 } 465 466 /// InitializePreprocessor - Initialize the preprocessor getting it and the 467 /// environment ready to process a single file. This returns true on error. 468 /// 469 void clang::InitializePreprocessor(Preprocessor &PP, 470 const PreprocessorOptions &InitOpts, 471 const HeaderSearchOptions &HSOpts, 472 const FrontendOptions &FEOpts) { 473 std::string PredefineBuffer; 474 PredefineBuffer.reserve(4080); 475 llvm::raw_string_ostream Predefines(PredefineBuffer); 476 MacroBuilder Builder(Predefines); 477 478 InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(), 479 PP.getFileManager(), InitOpts); 480 481 Builder.append("# 1 \"<built-in>\" 3"); 482 483 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 484 if (InitOpts.UsePredefines) 485 InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(), 486 FEOpts, Builder); 487 488 // Add on the predefines from the driver. Wrap in a #line directive to report 489 // that they come from the command line. 490 Builder.append("# 1 \"<command line>\" 1"); 491 492 // Process #define's and #undef's in the order they are given. 493 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 494 if (InitOpts.Macros[i].second) // isUndef 495 Builder.undefineMacro(InitOpts.Macros[i].first); 496 else 497 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 498 PP.getDiagnostics()); 499 } 500 501 // If -imacros are specified, include them now. These are processed before 502 // any -include directives. 503 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 504 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 505 506 // Process -include directives. 507 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 508 const std::string &Path = InitOpts.Includes[i]; 509 if (Path == InitOpts.ImplicitPTHInclude) 510 AddImplicitIncludePTH(Builder, PP, Path); 511 else 512 AddImplicitInclude(Builder, Path); 513 } 514 515 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 516 Builder.append("# 1 \"<built-in>\" 2"); 517 518 // Copy PredefinedBuffer into the Preprocessor. 519 PP.setPredefines(Predefines.str()); 520 521 // Initialize the header search object. 522 ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts, 523 PP.getLangOptions(), 524 PP.getTargetInfo().getTriple()); 525 } 526