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Shih-wei Liaof8fd82b2010-02-10 11:10:31 -08001//===--- 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/MacroBuilder.h"
16#include "clang/Basic/TargetInfo.h"
17#include "clang/Frontend/FrontendDiagnostic.h"
18#include "clang/Frontend/FrontendOptions.h"
19#include "clang/Frontend/PreprocessorOptions.h"
20#include "clang/Lex/Preprocessor.h"
21#include "clang/Basic/FileManager.h"
22#include "clang/Basic/SourceManager.h"
23#include "llvm/ADT/APFloat.h"
24#include "llvm/Support/MemoryBuffer.h"
25#include "llvm/System/Path.h"
26using namespace clang;
27
28// Append a #define line to Buf for Macro. Macro should be of the form XXX,
29// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
30// "#define XXX Y z W". To get a #define with no value, use "XXX=".
31static void DefineBuiltinMacro(MacroBuilder &Builder, llvm::StringRef Macro,
32 Diagnostic &Diags) {
33 std::pair<llvm::StringRef, llvm::StringRef> MacroPair = Macro.split('=');
34 llvm::StringRef MacroName = MacroPair.first;
35 llvm::StringRef MacroBody = MacroPair.second;
36 if (MacroName.size() != Macro.size()) {
37 // Per GCC -D semantics, the macro ends at \n if it exists.
38 llvm::StringRef::size_type End = MacroBody.find_first_of("\n\r");
39 if (End != llvm::StringRef::npos)
40 Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
41 << MacroName;
42 Builder.defineMacro(MacroName, MacroBody.substr(0, End));
43 } else {
44 // Push "macroname 1".
45 Builder.defineMacro(Macro);
46 }
47}
48
49std::string clang::NormalizeDashIncludePath(llvm::StringRef File) {
50 // Implicit include paths should be resolved relative to the current
51 // working directory first, and then use the regular header search
52 // mechanism. The proper way to handle this is to have the
53 // predefines buffer located at the current working directory, but
54 // it has not file entry. For now, workaround this by using an
55 // absolute path if we find the file here, and otherwise letting
56 // header search handle it.
57 llvm::sys::Path Path(File);
58 Path.makeAbsolute();
59 if (!Path.exists())
60 Path = File;
61
62 return Lexer::Stringify(Path.str());
63}
64
65/// AddImplicitInclude - Add an implicit #include of the specified file to the
66/// predefines buffer.
67static void AddImplicitInclude(MacroBuilder &Builder, llvm::StringRef File) {
68 Builder.append("#include \"" +
69 llvm::Twine(NormalizeDashIncludePath(File)) + "\"");
70}
71
72static void AddImplicitIncludeMacros(MacroBuilder &Builder,
73 llvm::StringRef File) {
74 Builder.append("#__include_macros \"" +
75 llvm::Twine(NormalizeDashIncludePath(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.
82static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP,
83 llvm::StringRef ImplicitIncludePTH) {
84 PTHManager *P = PP.getPTHManager();
85 assert(P && "No PTHManager.");
86 const char *OriginalFile = P->getOriginalSourceFile();
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/// PickFP - This is used to pick a value based on the FP semantics of the
98/// specified FP model.
99template <typename T>
100static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal,
101 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
102 T IEEEQuadVal) {
103 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle)
104 return IEEESingleVal;
105 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble)
106 return IEEEDoubleVal;
107 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended)
108 return X87DoubleExtendedVal;
109 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble)
110 return PPCDoubleDoubleVal;
111 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad);
112 return IEEEQuadVal;
113}
114
115static void DefineFloatMacros(MacroBuilder &Builder, llvm::StringRef Prefix,
116 const llvm::fltSemantics *Sem) {
117 const char *DenormMin, *Epsilon, *Max, *Min;
118 DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324",
119 "3.64519953188247460253e-4951L",
120 "4.94065645841246544176568792868221e-324L",
121 "6.47517511943802511092443895822764655e-4966L");
122 int Digits = PickFP(Sem, 6, 15, 18, 31, 33);
123 Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16",
124 "1.08420217248550443401e-19L",
125 "4.94065645841246544176568792868221e-324L",
126 "1.92592994438723585305597794258492732e-34L");
127 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113);
128 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931);
129 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932);
130 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381);
131 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384);
132 Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308",
133 "3.36210314311209350626e-4932L",
134 "2.00416836000897277799610805135016e-292L",
135 "3.36210314311209350626267781732175260e-4932L");
136 Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308",
137 "1.18973149535723176502e+4932L",
138 "1.79769313486231580793728971405301e+308L",
139 "1.18973149535723176508575932662800702e+4932L");
140
141 llvm::SmallString<32> DefPrefix;
142 DefPrefix = "__";
143 DefPrefix += Prefix;
144 DefPrefix += "_";
145
146 Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin);
147 Builder.defineMacro(DefPrefix + "HAS_DENORM__");
148 Builder.defineMacro(DefPrefix + "DIG__", llvm::Twine(Digits));
149 Builder.defineMacro(DefPrefix + "EPSILON__", llvm::Twine(Epsilon));
150 Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
151 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
152 Builder.defineMacro(DefPrefix + "MANT_DIG__", llvm::Twine(MantissaDigits));
153
154 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", llvm::Twine(Max10Exp));
155 Builder.defineMacro(DefPrefix + "MAX_EXP__", llvm::Twine(MaxExp));
156 Builder.defineMacro(DefPrefix + "MAX__", llvm::Twine(Max));
157
158 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+llvm::Twine(Min10Exp)+")");
159 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+llvm::Twine(MinExp)+")");
160 Builder.defineMacro(DefPrefix + "MIN__", llvm::Twine(Min));
161}
162
163
164/// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
165/// named MacroName with the max value for a type with width 'TypeWidth' a
166/// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
167static void DefineTypeSize(llvm::StringRef MacroName, unsigned TypeWidth,
168 llvm::StringRef ValSuffix, bool isSigned,
169 MacroBuilder& Builder) {
170 long long MaxVal;
171 if (isSigned)
172 MaxVal = (1LL << (TypeWidth - 1)) - 1;
173 else
174 MaxVal = ~0LL >> (64-TypeWidth);
175
176 Builder.defineMacro(MacroName, llvm::Twine(MaxVal) + ValSuffix);
177}
178
179/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
180/// the width, suffix, and signedness of the given type
181static void DefineTypeSize(llvm::StringRef MacroName, TargetInfo::IntType Ty,
182 const TargetInfo &TI, MacroBuilder &Builder) {
183 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty),
184 TI.isTypeSigned(Ty), Builder);
185}
186
187static void DefineType(const llvm::Twine &MacroName, TargetInfo::IntType Ty,
188 MacroBuilder &Builder) {
189 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
190}
191
192static void DefineTypeWidth(llvm::StringRef MacroName, TargetInfo::IntType Ty,
193 const TargetInfo &TI, MacroBuilder &Builder) {
194 Builder.defineMacro(MacroName, llvm::Twine(TI.getTypeWidth(Ty)));
195}
196
197static void DefineExactWidthIntType(TargetInfo::IntType Ty,
198 const TargetInfo &TI, MacroBuilder &Builder) {
199 int TypeWidth = TI.getTypeWidth(Ty);
200 DefineType("__INT" + llvm::Twine(TypeWidth) + "_TYPE__", Ty, Builder);
201
202 llvm::StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty));
203 if (!ConstSuffix.empty())
204 Builder.defineMacro("__INT" + llvm::Twine(TypeWidth) + "_C_SUFFIX__",
205 ConstSuffix);
206}
207
208static void InitializePredefinedMacros(const TargetInfo &TI,
209 const LangOptions &LangOpts,
210 const FrontendOptions &FEOpts,
211 MacroBuilder &Builder) {
212 // Compiler version introspection macros.
213 Builder.defineMacro("__llvm__"); // LLVM Backend
214 Builder.defineMacro("__clang__"); // Clang Frontend
215
216 // Currently claim to be compatible with GCC 4.2.1-5621.
217 Builder.defineMacro("__GNUC_MINOR__", "2");
218 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
219 Builder.defineMacro("__GNUC__", "4");
220 Builder.defineMacro("__GXX_ABI_VERSION", "1002");
221 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible Clang Compiler\"");
222
223 // Initialize language-specific preprocessor defines.
224
225 // These should all be defined in the preprocessor according to the
226 // current language configuration.
227 if (!LangOpts.Microsoft)
228 Builder.defineMacro("__STDC__");
229 if (LangOpts.AsmPreprocessor)
230 Builder.defineMacro("__ASSEMBLER__");
231
232 if (!LangOpts.CPlusPlus) {
233 if (LangOpts.C99)
234 Builder.defineMacro("__STDC_VERSION__", "199901L");
235 else if (!LangOpts.GNUMode && LangOpts.Digraphs)
236 Builder.defineMacro("__STDC_VERSION__", "199409L");
237 }
238
239 // Standard conforming mode?
240 if (!LangOpts.GNUMode)
241 Builder.defineMacro("__STRICT_ANSI__");
242
243 if (LangOpts.CPlusPlus0x)
244 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
245
246 if (LangOpts.Freestanding)
247 Builder.defineMacro("__STDC_HOSTED__", "0");
248 else
249 Builder.defineMacro("__STDC_HOSTED__");
250
251 if (LangOpts.ObjC1) {
252 Builder.defineMacro("__OBJC__");
253 if (LangOpts.ObjCNonFragileABI) {
254 Builder.defineMacro("__OBJC2__");
255 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
256 }
257
258 if (LangOpts.getGCMode() != LangOptions::NonGC)
259 Builder.defineMacro("__OBJC_GC__");
260
261 if (LangOpts.NeXTRuntime)
262 Builder.defineMacro("__NEXT_RUNTIME__");
263 }
264
265 // darwin_constant_cfstrings controls this. This is also dependent
266 // on other things like the runtime I believe. This is set even for C code.
267 Builder.defineMacro("__CONSTANT_CFSTRINGS__");
268
269 if (LangOpts.ObjC2)
270 Builder.defineMacro("OBJC_NEW_PROPERTIES");
271
272 if (LangOpts.PascalStrings)
273 Builder.defineMacro("__PASCAL_STRINGS__");
274
275 if (LangOpts.Blocks) {
276 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
277 Builder.defineMacro("__BLOCKS__");
278 }
279
280 if (LangOpts.Exceptions)
281 Builder.defineMacro("__EXCEPTIONS");
282
283 if (LangOpts.CPlusPlus) {
284 Builder.defineMacro("__DEPRECATED");
285 Builder.defineMacro("__GNUG__", "4");
286 Builder.defineMacro("__GXX_WEAK__");
287 if (LangOpts.GNUMode)
288 Builder.defineMacro("__cplusplus");
289 else
290 // C++ [cpp.predefined]p1:
291 // The name_ _cplusplusis defined to the value199711Lwhen compiling a
292 // C++ translation unit.
293 Builder.defineMacro("__cplusplus", "199711L");
294 Builder.defineMacro("__private_extern__", "extern");
295 // Ugly hack to work with GNU libstdc++.
296 Builder.defineMacro("_GNU_SOURCE");
297 }
298
299 if (LangOpts.Microsoft) {
300 // Filter out some microsoft extensions when trying to parse in ms-compat
301 // mode.
302 Builder.defineMacro("__int8", "__INT8_TYPE__");
303 Builder.defineMacro("__int16", "__INT16_TYPE__");
304 Builder.defineMacro("__int32", "__INT32_TYPE__");
305 Builder.defineMacro("__int64", "__INT64_TYPE__");
306 // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however
307 // VC++ appears to only like __FUNCTION__.
308 Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__");
309 // Work around some issues with Visual C++ headerws.
310 if (LangOpts.CPlusPlus) {
311 // Since we define wchar_t in C++ mode.
312 Builder.defineMacro("_WCHAR_T_DEFINED");
313 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
314 // FIXME: This should be temporary until we have a __pragma
315 // solution, to avoid some errors flagged in VC++ headers.
316 Builder.defineMacro("_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES", "0");
317 }
318 }
319
320 if (LangOpts.Optimize)
321 Builder.defineMacro("__OPTIMIZE__");
322 if (LangOpts.OptimizeSize)
323 Builder.defineMacro("__OPTIMIZE_SIZE__");
324
325 // Initialize target-specific preprocessor defines.
326
327 // Define type sizing macros based on the target properties.
328 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
329 Builder.defineMacro("__CHAR_BIT__", "8");
330
331 DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder);
332 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
333 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
334 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
335 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
336 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
337 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
338
339 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
340 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
341 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
342 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
343 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
344 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
345 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
346 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
347 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
348 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
349 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
350 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
351 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
352 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
353
354 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat());
355 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat());
356 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat());
357
358 // Define a __POINTER_WIDTH__ macro for stdint.h.
359 Builder.defineMacro("__POINTER_WIDTH__",
360 llvm::Twine((int)TI.getPointerWidth(0)));
361
362 if (!LangOpts.CharIsSigned)
363 Builder.defineMacro("__CHAR_UNSIGNED__");
364
365 // Define exact-width integer types for stdint.h
366 Builder.defineMacro("__INT" + llvm::Twine(TI.getCharWidth()) + "_TYPE__",
367 "char");
368
369 if (TI.getShortWidth() > TI.getCharWidth())
370 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder);
371
372 if (TI.getIntWidth() > TI.getShortWidth())
373 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder);
374
375 if (TI.getLongWidth() > TI.getIntWidth())
376 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder);
377
378 if (TI.getLongLongWidth() > TI.getLongWidth())
379 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder);
380
381 // Add __builtin_va_list typedef.
382 Builder.append(TI.getVAListDeclaration());
383
384 if (const char *Prefix = TI.getUserLabelPrefix())
385 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix);
386
387 // Build configuration options. FIXME: these should be controlled by
388 // command line options or something.
389 Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
390
391 if (LangOpts.GNUInline)
392 Builder.defineMacro("__GNUC_GNU_INLINE__");
393 else
394 Builder.defineMacro("__GNUC_STDC_INLINE__");
395
396 if (LangOpts.NoInline)
397 Builder.defineMacro("__NO_INLINE__");
398
399 if (unsigned PICLevel = LangOpts.PICLevel) {
400 Builder.defineMacro("__PIC__", llvm::Twine(PICLevel));
401 Builder.defineMacro("__pic__", llvm::Twine(PICLevel));
402 }
403
404 // Macros to control C99 numerics and <float.h>
405 Builder.defineMacro("__FLT_EVAL_METHOD__", "0");
406 Builder.defineMacro("__FLT_RADIX__", "2");
407 int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36);
408 Builder.defineMacro("__DECIMAL_DIG__", llvm::Twine(Dig));
409
410 if (LangOpts.getStackProtectorMode() == LangOptions::SSPOn)
411 Builder.defineMacro("__SSP__");
412 else if (LangOpts.getStackProtectorMode() == LangOptions::SSPReq)
413 Builder.defineMacro("__SSP_ALL__", "2");
414
415 if (FEOpts.ProgramAction == frontend::RewriteObjC)
416 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
417 // Get other target #defines.
418 TI.getTargetDefines(LangOpts, Builder);
419}
420
421// Initialize the remapping of files to alternative contents, e.g.,
422// those specified through other files.
423static void InitializeFileRemapping(Diagnostic &Diags,
424 SourceManager &SourceMgr,
425 FileManager &FileMgr,
426 const PreprocessorOptions &InitOpts) {
427 // Remap files in the source manager (with buffers).
428 for (PreprocessorOptions::remapped_file_buffer_iterator
429 Remap = InitOpts.remapped_file_buffer_begin(),
430 RemapEnd = InitOpts.remapped_file_buffer_end();
431 Remap != RemapEnd;
432 ++Remap) {
433 // Create the file entry for the file that we're mapping from.
434 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
435 Remap->second->getBufferSize(),
436 0);
437 if (!FromFile) {
438 Diags.Report(diag::err_fe_remap_missing_from_file)
439 << Remap->first;
440 continue;
441 }
442
443 // Override the contents of the "from" file with the contents of
444 // the "to" file.
445 SourceMgr.overrideFileContents(FromFile, Remap->second);
446 }
447
448 // Remap files in the source manager (with other files).
449 for (PreprocessorOptions::remapped_file_iterator
450 Remap = InitOpts.remapped_file_begin(),
451 RemapEnd = InitOpts.remapped_file_end();
452 Remap != RemapEnd;
453 ++Remap) {
454 // Find the file that we're mapping to.
455 const FileEntry *ToFile = FileMgr.getFile(Remap->second);
456 if (!ToFile) {
457 Diags.Report(diag::err_fe_remap_missing_to_file)
458 << Remap->first << Remap->second;
459 continue;
460 }
461
462 // Create the file entry for the file that we're mapping from.
463 const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first,
464 ToFile->getSize(),
465 0);
466 if (!FromFile) {
467 Diags.Report(diag::err_fe_remap_missing_from_file)
468 << Remap->first;
469 continue;
470 }
471
472 // Load the contents of the file we're mapping to.
473 std::string ErrorStr;
474 const llvm::MemoryBuffer *Buffer
475 = llvm::MemoryBuffer::getFile(ToFile->getName(), &ErrorStr);
476 if (!Buffer) {
477 Diags.Report(diag::err_fe_error_opening)
478 << Remap->second << ErrorStr;
479 continue;
480 }
481
482 // Override the contents of the "from" file with the contents of
483 // the "to" file.
484 SourceMgr.overrideFileContents(FromFile, Buffer);
485 }
486}
487
488/// InitializePreprocessor - Initialize the preprocessor getting it and the
489/// environment ready to process a single file. This returns true on error.
490///
491void clang::InitializePreprocessor(Preprocessor &PP,
492 const PreprocessorOptions &InitOpts,
493 const HeaderSearchOptions &HSOpts,
494 const FrontendOptions &FEOpts) {
495 std::string PredefineBuffer;
496 PredefineBuffer.reserve(4080);
497 llvm::raw_string_ostream Predefines(PredefineBuffer);
498 MacroBuilder Builder(Predefines);
499
500 InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(),
501 PP.getFileManager(), InitOpts);
502
503 Builder.append("# 1 \"<built-in>\" 3");
504
505 // Install things like __POWERPC__, __GNUC__, etc into the macro table.
506 if (InitOpts.UsePredefines)
507 InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(),
508 FEOpts, Builder);
509
510 // Add on the predefines from the driver. Wrap in a #line directive to report
511 // that they come from the command line.
512 Builder.append("# 1 \"<command line>\" 1");
513
514 // Process #define's and #undef's in the order they are given.
515 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
516 if (InitOpts.Macros[i].second) // isUndef
517 Builder.undefineMacro(InitOpts.Macros[i].first);
518 else
519 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
520 PP.getDiagnostics());
521 }
522
523 // If -imacros are specified, include them now. These are processed before
524 // any -include directives.
525 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
526 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
527
528 // Process -include directives.
529 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
530 const std::string &Path = InitOpts.Includes[i];
531 if (Path == InitOpts.ImplicitPTHInclude)
532 AddImplicitIncludePTH(Builder, PP, Path);
533 else
534 AddImplicitInclude(Builder, Path);
535 }
536
537 // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
538 Builder.append("# 1 \"<built-in>\" 2");
539
540 // Copy PredefinedBuffer into the Preprocessor.
541 PP.setPredefines(Predefines.str());
542
543 // Initialize the header search object.
544 ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts,
545 PP.getLangOptions(),
546 PP.getTargetInfo().getTriple());
547}