clang  3.7.0
InitHeaderSearch.cpp
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1 //===--- InitHeaderSearch.cpp - Initialize header search paths ------------===//
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 InitHeaderSearch class.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/Frontend/Utils.h"
17 #include "clang/Config/config.h" // C_INCLUDE_DIRS
18 #include "clang/Lex/HeaderSearch.h"
20 #include "llvm/ADT/SmallPtrSet.h"
21 #include "llvm/ADT/SmallString.h"
22 #include "llvm/ADT/SmallVector.h"
23 #include "llvm/ADT/StringExtras.h"
24 #include "llvm/ADT/Triple.h"
25 #include "llvm/ADT/Twine.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/Support/FileSystem.h"
28 #include "llvm/Support/Path.h"
29 #include "llvm/Support/raw_ostream.h"
30 
31 using namespace clang;
32 using namespace clang::frontend;
33 
34 namespace {
35 
36 /// InitHeaderSearch - This class makes it easier to set the search paths of
37 /// a HeaderSearch object. InitHeaderSearch stores several search path lists
38 /// internally, which can be sent to a HeaderSearch object in one swoop.
39 class InitHeaderSearch {
40  std::vector<std::pair<IncludeDirGroup, DirectoryLookup> > IncludePath;
41  typedef std::vector<std::pair<IncludeDirGroup,
42  DirectoryLookup> >::const_iterator path_iterator;
43  std::vector<std::pair<std::string, bool> > SystemHeaderPrefixes;
44  HeaderSearch &Headers;
45  bool Verbose;
46  std::string IncludeSysroot;
47  bool HasSysroot;
48 
49 public:
50 
51  InitHeaderSearch(HeaderSearch &HS, bool verbose, StringRef sysroot)
52  : Headers(HS), Verbose(verbose), IncludeSysroot(sysroot),
53  HasSysroot(!(sysroot.empty() || sysroot == "/")) {
54  }
55 
56  /// AddPath - Add the specified path to the specified group list, prefixing
57  /// the sysroot if used.
58  void AddPath(const Twine &Path, IncludeDirGroup Group, bool isFramework);
59 
60  /// AddUnmappedPath - Add the specified path to the specified group list,
61  /// without performing any sysroot remapping.
62  void AddUnmappedPath(const Twine &Path, IncludeDirGroup Group,
63  bool isFramework);
64 
65  /// AddSystemHeaderPrefix - Add the specified prefix to the system header
66  /// prefix list.
67  void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) {
68  SystemHeaderPrefixes.emplace_back(Prefix, IsSystemHeader);
69  }
70 
71  /// AddGnuCPlusPlusIncludePaths - Add the necessary paths to support a gnu
72  /// libstdc++.
73  void AddGnuCPlusPlusIncludePaths(StringRef Base,
74  StringRef ArchDir,
75  StringRef Dir32,
76  StringRef Dir64,
77  const llvm::Triple &triple);
78 
79  /// AddMinGWCPlusPlusIncludePaths - Add the necessary paths to support a MinGW
80  /// libstdc++.
81  void AddMinGWCPlusPlusIncludePaths(StringRef Base,
82  StringRef Arch,
83  StringRef Version);
84 
85  // AddDefaultCIncludePaths - Add paths that should always be searched.
86  void AddDefaultCIncludePaths(const llvm::Triple &triple,
87  const HeaderSearchOptions &HSOpts);
88 
89  // AddDefaultCPlusPlusIncludePaths - Add paths that should be searched when
90  // compiling c++.
91  void AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple,
92  const HeaderSearchOptions &HSOpts);
93 
94  /// AddDefaultSystemIncludePaths - Adds the default system include paths so
95  /// that e.g. stdio.h is found.
96  void AddDefaultIncludePaths(const LangOptions &Lang,
97  const llvm::Triple &triple,
98  const HeaderSearchOptions &HSOpts);
99 
100  /// Realize - Merges all search path lists into one list and send it to
101  /// HeaderSearch.
102  void Realize(const LangOptions &Lang);
103 };
104 
105 } // end anonymous namespace.
106 
107 static bool CanPrefixSysroot(StringRef Path) {
108 #if defined(LLVM_ON_WIN32)
109  return !Path.empty() && llvm::sys::path::is_separator(Path[0]);
110 #else
111  return llvm::sys::path::is_absolute(Path);
112 #endif
113 }
114 
115 void InitHeaderSearch::AddPath(const Twine &Path, IncludeDirGroup Group,
116  bool isFramework) {
117  // Add the path with sysroot prepended, if desired and this is a system header
118  // group.
119  if (HasSysroot) {
120  SmallString<256> MappedPathStorage;
121  StringRef MappedPathStr = Path.toStringRef(MappedPathStorage);
122  if (CanPrefixSysroot(MappedPathStr)) {
123  AddUnmappedPath(IncludeSysroot + Path, Group, isFramework);
124  return;
125  }
126  }
127 
128  AddUnmappedPath(Path, Group, isFramework);
129 }
130 
131 void InitHeaderSearch::AddUnmappedPath(const Twine &Path, IncludeDirGroup Group,
132  bool isFramework) {
133  assert(!Path.isTriviallyEmpty() && "can't handle empty path here");
134 
135  FileManager &FM = Headers.getFileMgr();
136  SmallString<256> MappedPathStorage;
137  StringRef MappedPathStr = Path.toStringRef(MappedPathStorage);
138 
139  // Compute the DirectoryLookup type.
141  if (Group == Quoted || Group == Angled || Group == IndexHeaderMap) {
142  Type = SrcMgr::C_User;
143  } else if (Group == ExternCSystem) {
145  } else {
146  Type = SrcMgr::C_System;
147  }
148 
149  // If the directory exists, add it.
150  if (const DirectoryEntry *DE = FM.getDirectory(MappedPathStr)) {
151  IncludePath.push_back(
152  std::make_pair(Group, DirectoryLookup(DE, Type, isFramework)));
153  return;
154  }
155 
156  // Check to see if this is an apple-style headermap (which are not allowed to
157  // be frameworks).
158  if (!isFramework) {
159  if (const FileEntry *FE = FM.getFile(MappedPathStr)) {
160  if (const HeaderMap *HM = Headers.CreateHeaderMap(FE)) {
161  // It is a headermap, add it to the search path.
162  IncludePath.push_back(
163  std::make_pair(Group,
164  DirectoryLookup(HM, Type, Group == IndexHeaderMap)));
165  return;
166  }
167  }
168  }
169 
170  if (Verbose)
171  llvm::errs() << "ignoring nonexistent directory \""
172  << MappedPathStr << "\"\n";
173 }
174 
175 void InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base,
176  StringRef ArchDir,
177  StringRef Dir32,
178  StringRef Dir64,
179  const llvm::Triple &triple) {
180  // Add the base dir
181  AddPath(Base, CXXSystem, false);
182 
183  // Add the multilib dirs
184  llvm::Triple::ArchType arch = triple.getArch();
185  bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64;
186  if (is64bit)
187  AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, false);
188  else
189  AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, false);
190 
191  // Add the backward dir
192  AddPath(Base + "/backward", CXXSystem, false);
193 }
194 
195 void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base,
196  StringRef Arch,
197  StringRef Version) {
198  AddPath(Base + "/" + Arch + "/" + Version + "/include/c++",
199  CXXSystem, false);
200  AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch,
201  CXXSystem, false);
202  AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward",
203  CXXSystem, false);
204 }
205 
206 void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
207  const HeaderSearchOptions &HSOpts) {
208  llvm::Triple::OSType os = triple.getOS();
209 
210  if (HSOpts.UseStandardSystemIncludes) {
211  switch (os) {
212  case llvm::Triple::CloudABI:
213  case llvm::Triple::FreeBSD:
214  case llvm::Triple::NetBSD:
215  case llvm::Triple::OpenBSD:
216  case llvm::Triple::Bitrig:
217  case llvm::Triple::NaCl:
218  break;
219  case llvm::Triple::Win32:
220  if (triple.getEnvironment() != llvm::Triple::Cygnus)
221  break;
222  default:
223  // FIXME: temporary hack: hard-coded paths.
224  AddPath("/usr/local/include", System, false);
225  break;
226  }
227  }
228 
229  // Builtin includes use #include_next directives and should be positioned
230  // just prior C include dirs.
231  if (HSOpts.UseBuiltinIncludes) {
232  // Ignore the sys root, we *always* look for clang headers relative to
233  // supplied path.
234  SmallString<128> P = StringRef(HSOpts.ResourceDir);
235  llvm::sys::path::append(P, "include");
236  AddUnmappedPath(P, ExternCSystem, false);
237  }
238 
239  // All remaining additions are for system include directories, early exit if
240  // we aren't using them.
241  if (!HSOpts.UseStandardSystemIncludes)
242  return;
243 
244  // Add dirs specified via 'configure --with-c-include-dirs'.
245  StringRef CIncludeDirs(C_INCLUDE_DIRS);
246  if (CIncludeDirs != "") {
248  CIncludeDirs.split(dirs, ":");
249  for (SmallVectorImpl<StringRef>::iterator i = dirs.begin();
250  i != dirs.end();
251  ++i)
252  AddPath(*i, ExternCSystem, false);
253  return;
254  }
255 
256  switch (os) {
257  case llvm::Triple::Linux:
258  llvm_unreachable("Include management is handled in the driver.");
259 
260  case llvm::Triple::CloudABI: {
261  // <sysroot>/<triple>/include
262  SmallString<128> P = StringRef(HSOpts.ResourceDir);
263  llvm::sys::path::append(P, "../../..", triple.str(), "include");
264  AddPath(P, System, false);
265  break;
266  }
267 
268  case llvm::Triple::Haiku:
269  AddPath("/boot/common/include", System, false);
270  AddPath("/boot/develop/headers/os", System, false);
271  AddPath("/boot/develop/headers/os/app", System, false);
272  AddPath("/boot/develop/headers/os/arch", System, false);
273  AddPath("/boot/develop/headers/os/device", System, false);
274  AddPath("/boot/develop/headers/os/drivers", System, false);
275  AddPath("/boot/develop/headers/os/game", System, false);
276  AddPath("/boot/develop/headers/os/interface", System, false);
277  AddPath("/boot/develop/headers/os/kernel", System, false);
278  AddPath("/boot/develop/headers/os/locale", System, false);
279  AddPath("/boot/develop/headers/os/mail", System, false);
280  AddPath("/boot/develop/headers/os/media", System, false);
281  AddPath("/boot/develop/headers/os/midi", System, false);
282  AddPath("/boot/develop/headers/os/midi2", System, false);
283  AddPath("/boot/develop/headers/os/net", System, false);
284  AddPath("/boot/develop/headers/os/storage", System, false);
285  AddPath("/boot/develop/headers/os/support", System, false);
286  AddPath("/boot/develop/headers/os/translation", System, false);
287  AddPath("/boot/develop/headers/os/add-ons/graphics", System, false);
288  AddPath("/boot/develop/headers/os/add-ons/input_server", System, false);
289  AddPath("/boot/develop/headers/os/add-ons/screen_saver", System, false);
290  AddPath("/boot/develop/headers/os/add-ons/tracker", System, false);
291  AddPath("/boot/develop/headers/os/be_apps/Deskbar", System, false);
292  AddPath("/boot/develop/headers/os/be_apps/NetPositive", System, false);
293  AddPath("/boot/develop/headers/os/be_apps/Tracker", System, false);
294  AddPath("/boot/develop/headers/cpp", System, false);
295  AddPath("/boot/develop/headers/cpp/i586-pc-haiku", System, false);
296  AddPath("/boot/develop/headers/3rdparty", System, false);
297  AddPath("/boot/develop/headers/bsd", System, false);
298  AddPath("/boot/develop/headers/glibc", System, false);
299  AddPath("/boot/develop/headers/posix", System, false);
300  AddPath("/boot/develop/headers", System, false);
301  break;
302  case llvm::Triple::RTEMS:
303  break;
304  case llvm::Triple::Win32:
305  switch (triple.getEnvironment()) {
306  default: llvm_unreachable("Include management is handled in the driver.");
307  case llvm::Triple::Cygnus:
308  AddPath("/usr/include/w32api", System, false);
309  break;
310  case llvm::Triple::GNU:
311  break;
312  }
313  break;
314  default:
315  break;
316  }
317 
318  switch (os) {
319  case llvm::Triple::CloudABI:
320  case llvm::Triple::RTEMS:
321  case llvm::Triple::NaCl:
322  break;
323  default:
324  AddPath("/usr/include", ExternCSystem, false);
325  break;
326  }
327 }
328 
329 void InitHeaderSearch::
330 AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) {
331  llvm::Triple::OSType os = triple.getOS();
332  // FIXME: temporary hack: hard-coded paths.
333 
334  if (triple.isOSDarwin()) {
335  switch (triple.getArch()) {
336  default: break;
337 
338  case llvm::Triple::ppc:
339  case llvm::Triple::ppc64:
340  AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
341  "powerpc-apple-darwin10", "", "ppc64",
342  triple);
343  AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
344  "powerpc-apple-darwin10", "", "ppc64",
345  triple);
346  break;
347 
348  case llvm::Triple::x86:
349  case llvm::Triple::x86_64:
350  AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
351  "i686-apple-darwin10", "", "x86_64", triple);
352  AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
353  "i686-apple-darwin8", "", "", triple);
354  break;
355 
356  case llvm::Triple::arm:
357  case llvm::Triple::thumb:
358  AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
359  "arm-apple-darwin10", "v7", "", triple);
360  AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
361  "arm-apple-darwin10", "v6", "", triple);
362  break;
363 
364  case llvm::Triple::aarch64:
365  AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
366  "arm64-apple-darwin10", "", "", triple);
367  break;
368  }
369  return;
370  }
371 
372  switch (os) {
373  case llvm::Triple::Linux:
374  llvm_unreachable("Include management is handled in the driver.");
375  break;
376  case llvm::Triple::Win32:
377  switch (triple.getEnvironment()) {
378  default: llvm_unreachable("Include management is handled in the driver.");
379  case llvm::Triple::Cygnus:
380  // Cygwin-1.7
381  AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3");
382  AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
383  AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
384  // g++-4 / Cygwin-1.5
385  AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
386  break;
387  }
388  break;
389  case llvm::Triple::DragonFly:
390  if (llvm::sys::fs::exists("/usr/lib/gcc47"))
391  AddPath("/usr/include/c++/4.7", CXXSystem, false);
392  else
393  AddPath("/usr/include/c++/4.4", CXXSystem, false);
394  break;
395  case llvm::Triple::OpenBSD: {
396  std::string t = triple.getTriple();
397  if (t.substr(0, 6) == "x86_64")
398  t.replace(0, 6, "amd64");
399  AddGnuCPlusPlusIncludePaths("/usr/include/g++",
400  t, "", "", triple);
401  break;
402  }
403  case llvm::Triple::Minix:
404  AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
405  "", "", "", triple);
406  break;
407  case llvm::Triple::Solaris:
408  AddGnuCPlusPlusIncludePaths("/usr/gcc/4.5/include/c++/4.5.2/",
409  "i386-pc-solaris2.11", "", "", triple);
410  break;
411  default:
412  break;
413  }
414 }
415 
416 void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang,
417  const llvm::Triple &triple,
418  const HeaderSearchOptions &HSOpts) {
419  // NB: This code path is going away. All of the logic is moving into the
420  // driver which has the information necessary to do target-specific
421  // selections of default include paths. Each target which moves there will be
422  // exempted from this logic here until we can delete the entire pile of code.
423  switch (triple.getOS()) {
424  default:
425  break; // Everything else continues to use this routine's logic.
426 
427  case llvm::Triple::Linux:
428  return;
429 
430  case llvm::Triple::Win32:
431  if (triple.getEnvironment() != llvm::Triple::Cygnus ||
432  triple.isOSBinFormatMachO())
433  return;
434  break;
435  }
436 
437  if (Lang.CPlusPlus && HSOpts.UseStandardCXXIncludes &&
438  HSOpts.UseStandardSystemIncludes) {
439  if (HSOpts.UseLibcxx) {
440  if (triple.isOSDarwin()) {
441  // On Darwin, libc++ may be installed alongside the compiler in
442  // include/c++/v1.
443  if (!HSOpts.ResourceDir.empty()) {
444  // Remove version from foo/lib/clang/version
445  StringRef NoVer = llvm::sys::path::parent_path(HSOpts.ResourceDir);
446  // Remove clang from foo/lib/clang
447  StringRef Lib = llvm::sys::path::parent_path(NoVer);
448  // Remove lib from foo/lib
449  SmallString<128> P = llvm::sys::path::parent_path(Lib);
450 
451  // Get foo/include/c++/v1
452  llvm::sys::path::append(P, "include", "c++", "v1");
453  AddUnmappedPath(P, CXXSystem, false);
454  }
455  }
456  // On Solaris, include the support directory for things like xlocale and
457  // fudged system headers.
458  if (triple.getOS() == llvm::Triple::Solaris)
459  AddPath("/usr/include/c++/v1/support/solaris", CXXSystem, false);
460 
461  AddPath("/usr/include/c++/v1", CXXSystem, false);
462  } else {
463  AddDefaultCPlusPlusIncludePaths(triple, HSOpts);
464  }
465  }
466 
467  AddDefaultCIncludePaths(triple, HSOpts);
468 
469  // Add the default framework include paths on Darwin.
470  if (HSOpts.UseStandardSystemIncludes) {
471  if (triple.isOSDarwin()) {
472  AddPath("/System/Library/Frameworks", System, true);
473  AddPath("/Library/Frameworks", System, true);
474  }
475  }
476 }
477 
478 /// RemoveDuplicates - If there are duplicate directory entries in the specified
479 /// search list, remove the later (dead) ones. Returns the number of non-system
480 /// headers removed, which is used to update NumAngled.
481 static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList,
482  unsigned First, bool Verbose) {
483  llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs;
484  llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs;
485  llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps;
486  unsigned NonSystemRemoved = 0;
487  for (unsigned i = First; i != SearchList.size(); ++i) {
488  unsigned DirToRemove = i;
489 
490  const DirectoryLookup &CurEntry = SearchList[i];
491 
492  if (CurEntry.isNormalDir()) {
493  // If this isn't the first time we've seen this dir, remove it.
494  if (SeenDirs.insert(CurEntry.getDir()).second)
495  continue;
496  } else if (CurEntry.isFramework()) {
497  // If this isn't the first time we've seen this framework dir, remove it.
498  if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second)
499  continue;
500  } else {
501  assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
502  // If this isn't the first time we've seen this headermap, remove it.
503  if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second)
504  continue;
505  }
506 
507  // If we have a normal #include dir/framework/headermap that is shadowed
508  // later in the chain by a system include location, we actually want to
509  // ignore the user's request and drop the user dir... keeping the system
510  // dir. This is weird, but required to emulate GCC's search path correctly.
511  //
512  // Since dupes of system dirs are rare, just rescan to find the original
513  // that we're nuking instead of using a DenseMap.
514  if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) {
515  // Find the dir that this is the same of.
516  unsigned FirstDir;
517  for (FirstDir = 0; ; ++FirstDir) {
518  assert(FirstDir != i && "Didn't find dupe?");
519 
520  const DirectoryLookup &SearchEntry = SearchList[FirstDir];
521 
522  // If these are different lookup types, then they can't be the dupe.
523  if (SearchEntry.getLookupType() != CurEntry.getLookupType())
524  continue;
525 
526  bool isSame;
527  if (CurEntry.isNormalDir())
528  isSame = SearchEntry.getDir() == CurEntry.getDir();
529  else if (CurEntry.isFramework())
530  isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir();
531  else {
532  assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
533  isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap();
534  }
535 
536  if (isSame)
537  break;
538  }
539 
540  // If the first dir in the search path is a non-system dir, zap it
541  // instead of the system one.
542  if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User)
543  DirToRemove = FirstDir;
544  }
545 
546  if (Verbose) {
547  llvm::errs() << "ignoring duplicate directory \""
548  << CurEntry.getName() << "\"\n";
549  if (DirToRemove != i)
550  llvm::errs() << " as it is a non-system directory that duplicates "
551  << "a system directory\n";
552  }
553  if (DirToRemove != i)
554  ++NonSystemRemoved;
555 
556  // This is reached if the current entry is a duplicate. Remove the
557  // DirToRemove (usually the current dir).
558  SearchList.erase(SearchList.begin()+DirToRemove);
559  --i;
560  }
561  return NonSystemRemoved;
562 }
563 
564 
565 void InitHeaderSearch::Realize(const LangOptions &Lang) {
566  // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
567  std::vector<DirectoryLookup> SearchList;
568  SearchList.reserve(IncludePath.size());
569 
570  // Quoted arguments go first.
571  for (path_iterator it = IncludePath.begin(), ie = IncludePath.end();
572  it != ie; ++it) {
573  if (it->first == Quoted)
574  SearchList.push_back(it->second);
575  }
576  // Deduplicate and remember index.
577  RemoveDuplicates(SearchList, 0, Verbose);
578  unsigned NumQuoted = SearchList.size();
579 
580  for (path_iterator it = IncludePath.begin(), ie = IncludePath.end();
581  it != ie; ++it) {
582  if (it->first == Angled || it->first == IndexHeaderMap)
583  SearchList.push_back(it->second);
584  }
585 
586  RemoveDuplicates(SearchList, NumQuoted, Verbose);
587  unsigned NumAngled = SearchList.size();
588 
589  for (path_iterator it = IncludePath.begin(), ie = IncludePath.end();
590  it != ie; ++it) {
591  if (it->first == System || it->first == ExternCSystem ||
592  (!Lang.ObjC1 && !Lang.CPlusPlus && it->first == CSystem) ||
593  (/*FIXME !Lang.ObjC1 && */Lang.CPlusPlus && it->first == CXXSystem) ||
594  (Lang.ObjC1 && !Lang.CPlusPlus && it->first == ObjCSystem) ||
595  (Lang.ObjC1 && Lang.CPlusPlus && it->first == ObjCXXSystem))
596  SearchList.push_back(it->second);
597  }
598 
599  for (path_iterator it = IncludePath.begin(), ie = IncludePath.end();
600  it != ie; ++it) {
601  if (it->first == After)
602  SearchList.push_back(it->second);
603  }
604 
605  // Remove duplicates across both the Angled and System directories. GCC does
606  // this and failing to remove duplicates across these two groups breaks
607  // #include_next.
608  unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose);
609  NumAngled -= NonSystemRemoved;
610 
611  bool DontSearchCurDir = false; // TODO: set to true if -I- is set?
612  Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir);
613 
614  Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes);
615 
616  // If verbose, print the list of directories that will be searched.
617  if (Verbose) {
618  llvm::errs() << "#include \"...\" search starts here:\n";
619  for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
620  if (i == NumQuoted)
621  llvm::errs() << "#include <...> search starts here:\n";
622  const char *Name = SearchList[i].getName();
623  const char *Suffix;
624  if (SearchList[i].isNormalDir())
625  Suffix = "";
626  else if (SearchList[i].isFramework())
627  Suffix = " (framework directory)";
628  else {
629  assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup");
630  Suffix = " (headermap)";
631  }
632  llvm::errs() << " " << Name << Suffix << "\n";
633  }
634  llvm::errs() << "End of search list.\n";
635  }
636 }
637 
639  const HeaderSearchOptions &HSOpts,
640  const LangOptions &Lang,
641  const llvm::Triple &Triple) {
642  InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot);
643 
644  // Add the user defined entries.
645  for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) {
646  const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i];
647  if (E.IgnoreSysRoot) {
648  Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework);
649  } else {
650  Init.AddPath(E.Path, E.Group, E.IsFramework);
651  }
652  }
653 
654  Init.AddDefaultIncludePaths(Lang, Triple, HSOpts);
655 
656  for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i)
657  Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix,
658  HSOpts.SystemHeaderPrefixes[i].IsSystemHeader);
659 
660  if (HSOpts.UseBuiltinIncludes) {
661  // Set up the builtin include directory in the module map.
662  SmallString<128> P = StringRef(HSOpts.ResourceDir);
663  llvm::sys::path::append(P, "include");
664  if (const DirectoryEntry *Dir = HS.getFileMgr().getDirectory(P))
666  }
667 
668  Init.Realize(Lang);
669 }
Paths for '#include <>' added by '-I'.
unsigned UseLibcxx
Use libc++ instead of the default libstdc++.
Implements support for file system lookup, file system caching, and directory search management...
Definition: FileManager.h:115
Defines the clang::FileManager interface and associated types.
SrcMgr::CharacteristicKind getDirCharacteristic() const
Like System, but only used for C++.
Like System, but only used for ObjC++.
CharacteristicKind
Indicates whether a file or directory holds normal user code, system code, or system code which is im...
Definition: SourceManager.h:78
ModuleMap & getModuleMap()
Retrieve the module map.
Definition: HeaderSearch.h:585
Like System, but searched after the system directories.
std::vector< Entry > UserEntries
User specified include entries.
std::vector< SystemHeaderPrefix > SystemHeaderPrefixes
User-specified system header prefixes.
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:48
Encapsulates the information needed to find the file referenced by a #include or #include_next, (sub-)framework lookup, etc.
Definition: HeaderSearch.h:151
AnnotatingParser & P
const DirectoryEntry * getDirectory(StringRef DirName, bool CacheFailure=true)
Lookup, cache, and verify the specified directory (real or virtual).
const HeaderMap * getHeaderMap() const
Defines the clang::LangOptions interface.
LookupType_t getLookupType() const
unsigned UseBuiltinIncludes
Include the compiler builtin includes.
bool isNormalDir() const
isNormalDir - Return true if this is a normal directory, not a header map.
void setBuiltinIncludeDir(const DirectoryEntry *Dir)
Set the directory that contains Clang-supplied include files, such as our stdarg.h or tgmath...
Definition: ModuleMap.h:262
void ApplyHeaderSearchOptions(HeaderSearch &HS, const HeaderSearchOptions &HSOpts, const LangOptions &Lang, const llvm::Triple &triple)
Apply the header search options to get given HeaderSearch object.
const DirectoryEntry * getFrameworkDir() const
unsigned UseStandardSystemIncludes
Include the system standard include search directories.
Cached information about one file (either on disk or in the virtual file system). ...
Definition: FileManager.h:53
FileManager & getFileMgr() const
Definition: HeaderSearch.h:276
unsigned Verbose
Whether header search information should be output as for -v.
frontend::IncludeDirGroup Group
Like System, but only used for ObjC.
'#include ""' paths, added by 'gcc -iquote'.
building frameworks.
Like System, but only used for C.
static unsigned RemoveDuplicates(std::vector< DirectoryLookup > &SearchList, unsigned First, bool Verbose)
const char * getName() const
Cached information about one directory (either on disk or in the virtual file system).
Definition: FileManager.h:40
bool isHeaderMap() const
isHeaderMap - Return true if this is a header map, not a normal directory.
static bool CanPrefixSysroot(StringRef Path)
const DirectoryEntry * getDir() const
unsigned UseStandardCXXIncludes
Include the system standard C++ library include search directories.