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/PreprocessorOptions.h" 17 #include "clang/Lex/Preprocessor.h" 18 #include "llvm/ADT/StringExtras.h" 19 #include "llvm/ADT/STLExtras.h" 20 #include "llvm/System/Path.h" 21 using namespace clang; 22 23 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 24 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 25 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 26 static void DefineBuiltinMacro(std::vector<char> &Buf, const char *Macro) { 27 const char *Command = "#define "; 28 Buf.insert(Buf.end(), Command, Command+strlen(Command)); 29 if (const char *Equal = strchr(Macro, '=')) { 30 // Turn the = into ' '. 31 Buf.insert(Buf.end(), Macro, Equal); 32 Buf.push_back(' '); 33 34 // Per GCC -D semantics, the macro ends at \n if it exists. 35 const char *End = strpbrk(Equal, "\n\r"); 36 if (End) { 37 fprintf(stderr, "warning: macro '%s' contains embedded newline, text " 38 "after the newline is ignored.\n", 39 std::string(Macro, Equal).c_str()); 40 } else { 41 End = Equal+strlen(Equal); 42 } 43 44 Buf.insert(Buf.end(), Equal+1, End); 45 } else { 46 // Push "macroname 1". 47 Buf.insert(Buf.end(), Macro, Macro+strlen(Macro)); 48 Buf.push_back(' '); 49 Buf.push_back('1'); 50 } 51 Buf.push_back('\n'); 52 } 53 54 // Append a #undef line to Buf for Macro. Macro should be of the form XXX 55 // and we emit "#undef XXX". 56 static void UndefineBuiltinMacro(std::vector<char> &Buf, const char *Macro) { 57 // Push "macroname". 58 const char *Command = "#undef "; 59 Buf.insert(Buf.end(), Command, Command+strlen(Command)); 60 Buf.insert(Buf.end(), Macro, Macro+strlen(Macro)); 61 Buf.push_back('\n'); 62 } 63 64 std::string clang::NormalizeDashIncludePath(llvm::StringRef File) { 65 // Implicit include paths should be resolved relative to the current 66 // working directory first, and then use the regular header search 67 // mechanism. The proper way to handle this is to have the 68 // predefines buffer located at the current working directory, but 69 // it has not file entry. For now, workaround this by using an 70 // absolute path if we find the file here, and otherwise letting 71 // header search handle it. 72 llvm::sys::Path Path(File); 73 Path.makeAbsolute(); 74 if (!Path.exists()) 75 Path = File; 76 77 return Lexer::Stringify(Path.str()); 78 } 79 80 /// Add the quoted name of an implicit include file. 81 static void AddQuotedIncludePath(std::vector<char> &Buf, 82 const std::string &File) { 83 84 // Escape double quotes etc. 85 Buf.push_back('"'); 86 std::string EscapedFile = NormalizeDashIncludePath(File); 87 Buf.insert(Buf.end(), EscapedFile.begin(), EscapedFile.end()); 88 Buf.push_back('"'); 89 } 90 91 /// AddImplicitInclude - Add an implicit #include of the specified file to the 92 /// predefines buffer. 93 static void AddImplicitInclude(std::vector<char> &Buf, 94 const std::string &File) { 95 const char *Inc = "#include "; 96 Buf.insert(Buf.end(), Inc, Inc+strlen(Inc)); 97 AddQuotedIncludePath(Buf, File); 98 Buf.push_back('\n'); 99 } 100 101 static void AddImplicitIncludeMacros(std::vector<char> &Buf, 102 const std::string &File) { 103 const char *Inc = "#__include_macros "; 104 Buf.insert(Buf.end(), Inc, Inc+strlen(Inc)); 105 AddQuotedIncludePath(Buf, File); 106 Buf.push_back('\n'); 107 // Marker token to stop the __include_macros fetch loop. 108 const char *Marker = "##\n"; // ##? 109 Buf.insert(Buf.end(), Marker, Marker+strlen(Marker)); 110 } 111 112 /// AddImplicitIncludePTH - Add an implicit #include using the original file 113 /// used to generate a PTH cache. 114 static void AddImplicitIncludePTH(std::vector<char> &Buf, Preprocessor &PP, 115 const std::string& ImplicitIncludePTH) { 116 PTHManager *P = PP.getPTHManager(); 117 assert(P && "No PTHManager."); 118 const char *OriginalFile = P->getOriginalSourceFile(); 119 120 if (!OriginalFile) { 121 assert(!ImplicitIncludePTH.empty()); 122 fprintf(stderr, "error: PTH file '%s' does not designate an original " 123 "source header file for -include-pth\n", 124 ImplicitIncludePTH.c_str()); 125 exit (1); 126 } 127 128 AddImplicitInclude(Buf, OriginalFile); 129 } 130 131 /// PickFP - This is used to pick a value based on the FP semantics of the 132 /// specified FP model. 133 template <typename T> 134 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, 135 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 136 T IEEEQuadVal) { 137 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) 138 return IEEESingleVal; 139 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) 140 return IEEEDoubleVal; 141 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) 142 return X87DoubleExtendedVal; 143 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) 144 return PPCDoubleDoubleVal; 145 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); 146 return IEEEQuadVal; 147 } 148 149 static void DefineFloatMacros(std::vector<char> &Buf, const char *Prefix, 150 const llvm::fltSemantics *Sem) { 151 const char *DenormMin, *Epsilon, *Max, *Min; 152 DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324", 153 "3.64519953188247460253e-4951L", 154 "4.94065645841246544176568792868221e-324L", 155 "6.47517511943802511092443895822764655e-4966L"); 156 int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 157 Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16", 158 "1.08420217248550443401e-19L", 159 "4.94065645841246544176568792868221e-324L", 160 "1.92592994438723585305597794258492732e-34L"); 161 int HasInifinity = 1, HasQuietNaN = 1; 162 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 163 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 164 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 165 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 166 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 167 Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308", 168 "3.36210314311209350626e-4932L", 169 "2.00416836000897277799610805135016e-292L", 170 "3.36210314311209350626267781732175260e-4932L"); 171 Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308", 172 "1.18973149535723176502e+4932L", 173 "1.79769313486231580793728971405301e+308L", 174 "1.18973149535723176508575932662800702e+4932L"); 175 176 char MacroBuf[100]; 177 sprintf(MacroBuf, "__%s_DENORM_MIN__=%s", Prefix, DenormMin); 178 DefineBuiltinMacro(Buf, MacroBuf); 179 sprintf(MacroBuf, "__%s_DIG__=%d", Prefix, Digits); 180 DefineBuiltinMacro(Buf, MacroBuf); 181 sprintf(MacroBuf, "__%s_EPSILON__=%s", Prefix, Epsilon); 182 DefineBuiltinMacro(Buf, MacroBuf); 183 sprintf(MacroBuf, "__%s_HAS_INFINITY__=%d", Prefix, HasInifinity); 184 DefineBuiltinMacro(Buf, MacroBuf); 185 sprintf(MacroBuf, "__%s_HAS_QUIET_NAN__=%d", Prefix, HasQuietNaN); 186 DefineBuiltinMacro(Buf, MacroBuf); 187 sprintf(MacroBuf, "__%s_MANT_DIG__=%d", Prefix, MantissaDigits); 188 DefineBuiltinMacro(Buf, MacroBuf); 189 sprintf(MacroBuf, "__%s_MAX_10_EXP__=%d", Prefix, Max10Exp); 190 DefineBuiltinMacro(Buf, MacroBuf); 191 sprintf(MacroBuf, "__%s_MAX_EXP__=%d", Prefix, MaxExp); 192 DefineBuiltinMacro(Buf, MacroBuf); 193 sprintf(MacroBuf, "__%s_MAX__=%s", Prefix, Max); 194 DefineBuiltinMacro(Buf, MacroBuf); 195 sprintf(MacroBuf, "__%s_MIN_10_EXP__=(%d)", Prefix, Min10Exp); 196 DefineBuiltinMacro(Buf, MacroBuf); 197 sprintf(MacroBuf, "__%s_MIN_EXP__=(%d)", Prefix, MinExp); 198 DefineBuiltinMacro(Buf, MacroBuf); 199 sprintf(MacroBuf, "__%s_MIN__=%s", Prefix, Min); 200 DefineBuiltinMacro(Buf, MacroBuf); 201 sprintf(MacroBuf, "__%s_HAS_DENORM__=1", Prefix); 202 DefineBuiltinMacro(Buf, MacroBuf); 203 } 204 205 206 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 207 /// named MacroName with the max value for a type with width 'TypeWidth' a 208 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 209 static void DefineTypeSize(const char *MacroName, unsigned TypeWidth, 210 const char *ValSuffix, bool isSigned, 211 std::vector<char> &Buf) { 212 char MacroBuf[60]; 213 long long MaxVal; 214 if (isSigned) 215 MaxVal = (1LL << (TypeWidth - 1)) - 1; 216 else 217 MaxVal = ~0LL >> (64-TypeWidth); 218 219 // FIXME: Switch to using raw_ostream and avoid utostr(). 220 sprintf(MacroBuf, "%s=%s%s", MacroName, llvm::utostr(MaxVal).c_str(), 221 ValSuffix); 222 DefineBuiltinMacro(Buf, MacroBuf); 223 } 224 225 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 226 /// the width, suffix, and signedness of the given type 227 static void DefineTypeSize(const char *MacroName, TargetInfo::IntType Ty, 228 const TargetInfo &TI, std::vector<char> &Buf) { 229 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 230 TI.isTypeSigned(Ty), Buf); 231 } 232 233 static void DefineType(const char *MacroName, TargetInfo::IntType Ty, 234 std::vector<char> &Buf) { 235 char MacroBuf[60]; 236 sprintf(MacroBuf, "%s=%s", MacroName, TargetInfo::getTypeName(Ty)); 237 DefineBuiltinMacro(Buf, MacroBuf); 238 } 239 240 static void DefineTypeWidth(const char *MacroName, TargetInfo::IntType Ty, 241 const TargetInfo &TI, std::vector<char> &Buf) { 242 char MacroBuf[60]; 243 sprintf(MacroBuf, "%s=%d", MacroName, TI.getTypeWidth(Ty)); 244 DefineBuiltinMacro(Buf, MacroBuf); 245 } 246 247 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 248 const TargetInfo &TI, std::vector<char> &Buf) { 249 char MacroBuf[60]; 250 int TypeWidth = TI.getTypeWidth(Ty); 251 sprintf(MacroBuf, "__INT%d_TYPE__", TypeWidth); 252 DefineType(MacroBuf, Ty, Buf); 253 254 255 const char *ConstSuffix = TargetInfo::getTypeConstantSuffix(Ty); 256 if (strlen(ConstSuffix) > 0) { 257 sprintf(MacroBuf, "__INT%d_C_SUFFIX__=%s", TypeWidth, ConstSuffix); 258 DefineBuiltinMacro(Buf, MacroBuf); 259 } 260 } 261 262 static void InitializePredefinedMacros(const TargetInfo &TI, 263 const LangOptions &LangOpts, 264 std::vector<char> &Buf) { 265 char MacroBuf[60]; 266 // Compiler version introspection macros. 267 DefineBuiltinMacro(Buf, "__llvm__=1"); // LLVM Backend 268 DefineBuiltinMacro(Buf, "__clang__=1"); // Clang Frontend 269 270 // Currently claim to be compatible with GCC 4.2.1-5621. 271 DefineBuiltinMacro(Buf, "__GNUC_MINOR__=2"); 272 DefineBuiltinMacro(Buf, "__GNUC_PATCHLEVEL__=1"); 273 DefineBuiltinMacro(Buf, "__GNUC__=4"); 274 DefineBuiltinMacro(Buf, "__GXX_ABI_VERSION=1002"); 275 DefineBuiltinMacro(Buf, "__VERSION__=\"4.2.1 Compatible Clang Compiler\""); 276 277 278 // Initialize language-specific preprocessor defines. 279 280 // These should all be defined in the preprocessor according to the 281 // current language configuration. 282 if (!LangOpts.Microsoft) 283 DefineBuiltinMacro(Buf, "__STDC__=1"); 284 if (LangOpts.AsmPreprocessor) 285 DefineBuiltinMacro(Buf, "__ASSEMBLER__=1"); 286 287 if (!LangOpts.CPlusPlus) { 288 if (LangOpts.C99) 289 DefineBuiltinMacro(Buf, "__STDC_VERSION__=199901L"); 290 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 291 DefineBuiltinMacro(Buf, "__STDC_VERSION__=199409L"); 292 } 293 294 // Standard conforming mode? 295 if (!LangOpts.GNUMode) 296 DefineBuiltinMacro(Buf, "__STRICT_ANSI__=1"); 297 298 if (LangOpts.CPlusPlus0x) 299 DefineBuiltinMacro(Buf, "__GXX_EXPERIMENTAL_CXX0X__"); 300 301 if (LangOpts.Freestanding) 302 DefineBuiltinMacro(Buf, "__STDC_HOSTED__=0"); 303 else 304 DefineBuiltinMacro(Buf, "__STDC_HOSTED__=1"); 305 306 if (LangOpts.ObjC1) { 307 DefineBuiltinMacro(Buf, "__OBJC__=1"); 308 if (LangOpts.ObjCNonFragileABI) { 309 DefineBuiltinMacro(Buf, "__OBJC2__=1"); 310 DefineBuiltinMacro(Buf, "OBJC_ZEROCOST_EXCEPTIONS=1"); 311 } 312 313 if (LangOpts.getGCMode() != LangOptions::NonGC) 314 DefineBuiltinMacro(Buf, "__OBJC_GC__=1"); 315 316 if (LangOpts.NeXTRuntime) 317 DefineBuiltinMacro(Buf, "__NEXT_RUNTIME__=1"); 318 } 319 320 // darwin_constant_cfstrings controls this. This is also dependent 321 // on other things like the runtime I believe. This is set even for C code. 322 DefineBuiltinMacro(Buf, "__CONSTANT_CFSTRINGS__=1"); 323 324 if (LangOpts.ObjC2) 325 DefineBuiltinMacro(Buf, "OBJC_NEW_PROPERTIES"); 326 327 if (LangOpts.PascalStrings) 328 DefineBuiltinMacro(Buf, "__PASCAL_STRINGS__"); 329 330 if (LangOpts.Blocks) { 331 DefineBuiltinMacro(Buf, "__block=__attribute__((__blocks__(byref)))"); 332 DefineBuiltinMacro(Buf, "__BLOCKS__=1"); 333 } 334 335 if (LangOpts.Exceptions) 336 DefineBuiltinMacro(Buf, "__EXCEPTIONS=1"); 337 338 if (LangOpts.CPlusPlus) { 339 DefineBuiltinMacro(Buf, "__DEPRECATED=1"); 340 DefineBuiltinMacro(Buf, "__GNUG__=4"); 341 DefineBuiltinMacro(Buf, "__GXX_WEAK__=1"); 342 if (LangOpts.GNUMode) 343 DefineBuiltinMacro(Buf, "__cplusplus=1"); 344 else 345 // C++ [cpp.predefined]p1: 346 // The name_ _cplusplusis defined to the value199711Lwhen compiling a 347 // C++ translation unit. 348 DefineBuiltinMacro(Buf, "__cplusplus=199711L"); 349 DefineBuiltinMacro(Buf, "__private_extern__=extern"); 350 // Ugly hack to work with GNU libstdc++. 351 DefineBuiltinMacro(Buf, "_GNU_SOURCE=1"); 352 } 353 354 if (LangOpts.Microsoft) { 355 // Filter out some microsoft extensions when trying to parse in ms-compat 356 // mode. 357 DefineBuiltinMacro(Buf, "__int8=__INT8_TYPE__"); 358 DefineBuiltinMacro(Buf, "__int16=__INT16_TYPE__"); 359 DefineBuiltinMacro(Buf, "__int32=__INT32_TYPE__"); 360 DefineBuiltinMacro(Buf, "__int64=__INT64_TYPE__"); 361 // Work around some issues with Visual C++ headerws. 362 if (LangOpts.CPlusPlus) { 363 // Since we define wchar_t in C++ mode. 364 DefineBuiltinMacro(Buf, "_WCHAR_T_DEFINED=1"); 365 DefineBuiltinMacro(Buf, "_NATIVE_WCHAR_T_DEFINED=1"); 366 // FIXME: This should be temporary until we have a __pragma 367 // solution, to avoid some errors flagged in VC++ headers. 368 DefineBuiltinMacro(Buf, "_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES=0"); 369 } 370 } 371 372 if (LangOpts.Optimize) 373 DefineBuiltinMacro(Buf, "__OPTIMIZE__=1"); 374 if (LangOpts.OptimizeSize) 375 DefineBuiltinMacro(Buf, "__OPTIMIZE_SIZE__=1"); 376 377 // Initialize target-specific preprocessor defines. 378 379 // Define type sizing macros based on the target properties. 380 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 381 DefineBuiltinMacro(Buf, "__CHAR_BIT__=8"); 382 383 DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Buf); 384 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Buf); 385 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Buf); 386 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Buf); 387 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Buf); 388 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Buf); 389 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Buf); 390 391 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Buf); 392 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Buf); 393 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Buf); 394 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Buf); 395 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Buf); 396 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Buf); 397 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Buf); 398 DefineType("__SIZE_TYPE__", TI.getSizeType(), Buf); 399 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Buf); 400 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Buf); 401 DefineType("__WINT_TYPE__", TI.getWIntType(), Buf); 402 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Buf); 403 404 DefineFloatMacros(Buf, "FLT", &TI.getFloatFormat()); 405 DefineFloatMacros(Buf, "DBL", &TI.getDoubleFormat()); 406 DefineFloatMacros(Buf, "LDBL", &TI.getLongDoubleFormat()); 407 408 // Define a __POINTER_WIDTH__ macro for stdint.h. 409 sprintf(MacroBuf, "__POINTER_WIDTH__=%d", (int)TI.getPointerWidth(0)); 410 DefineBuiltinMacro(Buf, MacroBuf); 411 412 if (!LangOpts.CharIsSigned) 413 DefineBuiltinMacro(Buf, "__CHAR_UNSIGNED__"); 414 415 // Define exact-width integer types for stdint.h 416 sprintf(MacroBuf, "__INT%d_TYPE__=char", TI.getCharWidth()); 417 DefineBuiltinMacro(Buf, MacroBuf); 418 419 if (TI.getShortWidth() > TI.getCharWidth()) 420 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Buf); 421 422 if (TI.getIntWidth() > TI.getShortWidth()) 423 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Buf); 424 425 if (TI.getLongWidth() > TI.getIntWidth()) 426 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Buf); 427 428 if (TI.getLongLongWidth() > TI.getLongWidth()) 429 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Buf); 430 431 // Add __builtin_va_list typedef. 432 { 433 const char *VAList = TI.getVAListDeclaration(); 434 Buf.insert(Buf.end(), VAList, VAList+strlen(VAList)); 435 Buf.push_back('\n'); 436 } 437 438 if (const char *Prefix = TI.getUserLabelPrefix()) { 439 sprintf(MacroBuf, "__USER_LABEL_PREFIX__=%s", Prefix); 440 DefineBuiltinMacro(Buf, MacroBuf); 441 } 442 443 // Build configuration options. FIXME: these should be controlled by 444 // command line options or something. 445 DefineBuiltinMacro(Buf, "__FINITE_MATH_ONLY__=0"); 446 447 if (LangOpts.GNUInline) 448 DefineBuiltinMacro(Buf, "__GNUC_GNU_INLINE__=1"); 449 else 450 DefineBuiltinMacro(Buf, "__GNUC_STDC_INLINE__=1"); 451 452 if (LangOpts.NoInline) 453 DefineBuiltinMacro(Buf, "__NO_INLINE__=1"); 454 455 if (unsigned PICLevel = LangOpts.PICLevel) { 456 sprintf(MacroBuf, "__PIC__=%d", PICLevel); 457 DefineBuiltinMacro(Buf, MacroBuf); 458 459 sprintf(MacroBuf, "__pic__=%d", PICLevel); 460 DefineBuiltinMacro(Buf, MacroBuf); 461 } 462 463 // Macros to control C99 numerics and <float.h> 464 DefineBuiltinMacro(Buf, "__FLT_EVAL_METHOD__=0"); 465 DefineBuiltinMacro(Buf, "__FLT_RADIX__=2"); 466 sprintf(MacroBuf, "__DECIMAL_DIG__=%d", 467 PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36)); 468 DefineBuiltinMacro(Buf, MacroBuf); 469 470 if (LangOpts.getStackProtectorMode() == LangOptions::SSPOn) 471 DefineBuiltinMacro(Buf, "__SSP__=1"); 472 else if (LangOpts.getStackProtectorMode() == LangOptions::SSPReq) 473 DefineBuiltinMacro(Buf, "__SSP_ALL__=2"); 474 475 // Get other target #defines. 476 TI.getTargetDefines(LangOpts, Buf); 477 } 478 479 /// InitializePreprocessor - Initialize the preprocessor getting it and the 480 /// environment ready to process a single file. This returns true on error. 481 /// 482 void clang::InitializePreprocessor(Preprocessor &PP, 483 const PreprocessorOptions &InitOpts, 484 const HeaderSearchOptions &HSOpts) { 485 std::vector<char> PredefineBuffer; 486 487 const char *LineDirective = "# 1 \"<built-in>\" 3\n"; 488 PredefineBuffer.insert(PredefineBuffer.end(), 489 LineDirective, LineDirective+strlen(LineDirective)); 490 491 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 492 if (InitOpts.UsePredefines) 493 InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(), 494 PredefineBuffer); 495 496 // Add on the predefines from the driver. Wrap in a #line directive to report 497 // that they come from the command line. 498 LineDirective = "# 1 \"<command line>\" 1\n"; 499 PredefineBuffer.insert(PredefineBuffer.end(), 500 LineDirective, LineDirective+strlen(LineDirective)); 501 502 // Process #define's and #undef's in the order they are given. 503 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 504 if (InitOpts.Macros[i].second) // isUndef 505 UndefineBuiltinMacro(PredefineBuffer, InitOpts.Macros[i].first.c_str()); 506 else 507 DefineBuiltinMacro(PredefineBuffer, InitOpts.Macros[i].first.c_str()); 508 } 509 510 // If -imacros are specified, include them now. These are processed before 511 // any -include directives. 512 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 513 AddImplicitIncludeMacros(PredefineBuffer, InitOpts.MacroIncludes[i]); 514 515 // Process -include directives. 516 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 517 const std::string &Path = InitOpts.Includes[i]; 518 if (Path == InitOpts.ImplicitPTHInclude) 519 AddImplicitIncludePTH(PredefineBuffer, PP, Path); 520 else 521 AddImplicitInclude(PredefineBuffer, Path); 522 } 523 524 // Null terminate PredefinedBuffer and add it. 525 PredefineBuffer.push_back(0); 526 PP.setPredefines(&PredefineBuffer[0]); 527 528 // Initialize the header search object. 529 ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts, 530 PP.getLangOptions(), 531 PP.getTargetInfo().getTriple()); 532 } 533