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"
15#include "clang/Basic/FileManager.h"
16#include "clang/Basic/LangOptions.h"
17#include "clang/Config/config.h" // C_INCLUDE_DIRS
18#include "clang/Lex/HeaderSearch.h"
19#include "clang/Lex/HeaderSearchOptions.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
31using namespace clang;
32using namespace clang::frontend;
33
34namespace {
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.
39class 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
49public:
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
107static 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
115void 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
131void 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.
140  SrcMgr::CharacteristicKind Type;
141  if (Group == Quoted || Group == Angled || Group == IndexHeaderMap) {
142    Type = SrcMgr::C_User;
143  } else if (Group == ExternCSystem) {
144    Type = SrcMgr::C_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
175void 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
195void 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
206void 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    case llvm::Triple::PS4:
219    case llvm::Triple::ELFIAMCU:
220      break;
221    case llvm::Triple::Win32:
222      if (triple.getEnvironment() != llvm::Triple::Cygnus)
223        break;
224    default:
225      // FIXME: temporary hack: hard-coded paths.
226      AddPath("/usr/local/include", System, false);
227      break;
228    }
229  }
230
231  // Builtin includes use #include_next directives and should be positioned
232  // just prior C include dirs.
233  if (HSOpts.UseBuiltinIncludes) {
234    // Ignore the sys root, we *always* look for clang headers relative to
235    // supplied path.
236    SmallString<128> P = StringRef(HSOpts.ResourceDir);
237    llvm::sys::path::append(P, "include");
238    AddUnmappedPath(P, ExternCSystem, false);
239  }
240
241  // All remaining additions are for system include directories, early exit if
242  // we aren't using them.
243  if (!HSOpts.UseStandardSystemIncludes)
244    return;
245
246  // Add dirs specified via 'configure --with-c-include-dirs'.
247  StringRef CIncludeDirs(C_INCLUDE_DIRS);
248  if (CIncludeDirs != "") {
249    SmallVector<StringRef, 5> dirs;
250    CIncludeDirs.split(dirs, ":");
251    for (StringRef dir : dirs)
252      AddPath(dir, 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  case llvm::Triple::ELFIAMCU:
323    break;
324  case llvm::Triple::PS4: {
325    // <isysroot> gets prepended later in AddPath().
326    std::string BaseSDKPath = "";
327    if (!HasSysroot) {
328      const char *envValue = getenv("SCE_PS4_SDK_DIR");
329      if (envValue)
330        BaseSDKPath = envValue;
331      else {
332        // HSOpts.ResourceDir variable contains the location of Clang's
333        // resource files.
334        // Assuming that Clang is configured for PS4 without
335        // --with-clang-resource-dir option, the location of Clang's resource
336        // files is <SDK_DIR>/host_tools/lib/clang
337        SmallString<128> P = StringRef(HSOpts.ResourceDir);
338        llvm::sys::path::append(P, "../../..");
339        BaseSDKPath = P.str();
340      }
341    }
342    AddPath(BaseSDKPath + "/target/include", System, false);
343    if (triple.isPS4CPU())
344      AddPath(BaseSDKPath + "/target/include_common", System, false);
345  }
346  default:
347    AddPath("/usr/include", ExternCSystem, false);
348    break;
349  }
350}
351
352void InitHeaderSearch::
353AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) {
354  llvm::Triple::OSType os = triple.getOS();
355  // FIXME: temporary hack: hard-coded paths.
356
357  if (triple.isOSDarwin()) {
358    switch (triple.getArch()) {
359    default: break;
360
361    case llvm::Triple::ppc:
362    case llvm::Triple::ppc64:
363      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
364                                  "powerpc-apple-darwin10", "", "ppc64",
365                                  triple);
366      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
367                                  "powerpc-apple-darwin10", "", "ppc64",
368                                  triple);
369      break;
370
371    case llvm::Triple::x86:
372    case llvm::Triple::x86_64:
373      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
374                                  "i686-apple-darwin10", "", "x86_64", triple);
375      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
376                                  "i686-apple-darwin8", "", "", triple);
377      break;
378
379    case llvm::Triple::arm:
380    case llvm::Triple::thumb:
381      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
382                                  "arm-apple-darwin10", "v7", "", triple);
383      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
384                                  "arm-apple-darwin10", "v6", "", triple);
385      break;
386
387    case llvm::Triple::aarch64:
388      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
389                                  "arm64-apple-darwin10", "", "", triple);
390      break;
391    }
392    return;
393  }
394
395  switch (os) {
396  case llvm::Triple::Linux:
397    llvm_unreachable("Include management is handled in the driver.");
398    break;
399  case llvm::Triple::Win32:
400    switch (triple.getEnvironment()) {
401    default: llvm_unreachable("Include management is handled in the driver.");
402    case llvm::Triple::Cygnus:
403      // Cygwin-1.7
404      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3");
405      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
406      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
407      // g++-4 / Cygwin-1.5
408      AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
409      break;
410    }
411    break;
412  case llvm::Triple::DragonFly:
413    if (llvm::sys::fs::exists("/usr/lib/gcc47"))
414      AddPath("/usr/include/c++/4.7", CXXSystem, false);
415    else
416      AddPath("/usr/include/c++/4.4", CXXSystem, false);
417    break;
418  case llvm::Triple::OpenBSD: {
419    std::string t = triple.getTriple();
420    if (t.substr(0, 6) == "x86_64")
421      t.replace(0, 6, "amd64");
422    AddGnuCPlusPlusIncludePaths("/usr/include/g++",
423                                t, "", "", triple);
424    break;
425  }
426  case llvm::Triple::Minix:
427    AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
428                                "", "", "", triple);
429    break;
430  default:
431    break;
432  }
433}
434
435void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang,
436                                              const llvm::Triple &triple,
437                                            const HeaderSearchOptions &HSOpts) {
438  // NB: This code path is going away. All of the logic is moving into the
439  // driver which has the information necessary to do target-specific
440  // selections of default include paths. Each target which moves there will be
441  // exempted from this logic here until we can delete the entire pile of code.
442  switch (triple.getOS()) {
443  default:
444    break; // Everything else continues to use this routine's logic.
445
446  case llvm::Triple::Linux:
447    return;
448
449  case llvm::Triple::Win32:
450    if (triple.getEnvironment() != llvm::Triple::Cygnus ||
451        triple.isOSBinFormatMachO())
452      return;
453    break;
454  }
455
456  if (Lang.CPlusPlus && HSOpts.UseStandardCXXIncludes &&
457      HSOpts.UseStandardSystemIncludes) {
458    if (HSOpts.UseLibcxx) {
459      if (triple.isOSDarwin()) {
460        // On Darwin, libc++ may be installed alongside the compiler in
461        // include/c++/v1.
462        if (!HSOpts.ResourceDir.empty()) {
463          // Remove version from foo/lib/clang/version
464          StringRef NoVer = llvm::sys::path::parent_path(HSOpts.ResourceDir);
465          // Remove clang from foo/lib/clang
466          StringRef Lib = llvm::sys::path::parent_path(NoVer);
467          // Remove lib from foo/lib
468          SmallString<128> P = llvm::sys::path::parent_path(Lib);
469
470          // Get foo/include/c++/v1
471          llvm::sys::path::append(P, "include", "c++", "v1");
472          AddUnmappedPath(P, CXXSystem, false);
473        }
474      }
475      AddPath("/usr/include/c++/v1", CXXSystem, false);
476    } else {
477      AddDefaultCPlusPlusIncludePaths(triple, HSOpts);
478    }
479  }
480
481  AddDefaultCIncludePaths(triple, HSOpts);
482
483  // Add the default framework include paths on Darwin.
484  if (HSOpts.UseStandardSystemIncludes) {
485    if (triple.isOSDarwin()) {
486      AddPath("/System/Library/Frameworks", System, true);
487      AddPath("/Library/Frameworks", System, true);
488    }
489  }
490}
491
492/// RemoveDuplicates - If there are duplicate directory entries in the specified
493/// search list, remove the later (dead) ones.  Returns the number of non-system
494/// headers removed, which is used to update NumAngled.
495static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList,
496                                 unsigned First, bool Verbose) {
497  llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs;
498  llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs;
499  llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps;
500  unsigned NonSystemRemoved = 0;
501  for (unsigned i = First; i != SearchList.size(); ++i) {
502    unsigned DirToRemove = i;
503
504    const DirectoryLookup &CurEntry = SearchList[i];
505
506    if (CurEntry.isNormalDir()) {
507      // If this isn't the first time we've seen this dir, remove it.
508      if (SeenDirs.insert(CurEntry.getDir()).second)
509        continue;
510    } else if (CurEntry.isFramework()) {
511      // If this isn't the first time we've seen this framework dir, remove it.
512      if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second)
513        continue;
514    } else {
515      assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
516      // If this isn't the first time we've seen this headermap, remove it.
517      if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second)
518        continue;
519    }
520
521    // If we have a normal #include dir/framework/headermap that is shadowed
522    // later in the chain by a system include location, we actually want to
523    // ignore the user's request and drop the user dir... keeping the system
524    // dir.  This is weird, but required to emulate GCC's search path correctly.
525    //
526    // Since dupes of system dirs are rare, just rescan to find the original
527    // that we're nuking instead of using a DenseMap.
528    if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) {
529      // Find the dir that this is the same of.
530      unsigned FirstDir;
531      for (FirstDir = 0; ; ++FirstDir) {
532        assert(FirstDir != i && "Didn't find dupe?");
533
534        const DirectoryLookup &SearchEntry = SearchList[FirstDir];
535
536        // If these are different lookup types, then they can't be the dupe.
537        if (SearchEntry.getLookupType() != CurEntry.getLookupType())
538          continue;
539
540        bool isSame;
541        if (CurEntry.isNormalDir())
542          isSame = SearchEntry.getDir() == CurEntry.getDir();
543        else if (CurEntry.isFramework())
544          isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir();
545        else {
546          assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
547          isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap();
548        }
549
550        if (isSame)
551          break;
552      }
553
554      // If the first dir in the search path is a non-system dir, zap it
555      // instead of the system one.
556      if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User)
557        DirToRemove = FirstDir;
558    }
559
560    if (Verbose) {
561      llvm::errs() << "ignoring duplicate directory \""
562                   << CurEntry.getName() << "\"\n";
563      if (DirToRemove != i)
564        llvm::errs() << "  as it is a non-system directory that duplicates "
565                     << "a system directory\n";
566    }
567    if (DirToRemove != i)
568      ++NonSystemRemoved;
569
570    // This is reached if the current entry is a duplicate.  Remove the
571    // DirToRemove (usually the current dir).
572    SearchList.erase(SearchList.begin()+DirToRemove);
573    --i;
574  }
575  return NonSystemRemoved;
576}
577
578
579void InitHeaderSearch::Realize(const LangOptions &Lang) {
580  // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
581  std::vector<DirectoryLookup> SearchList;
582  SearchList.reserve(IncludePath.size());
583
584  // Quoted arguments go first.
585  for (auto &Include : IncludePath)
586    if (Include.first == Quoted)
587      SearchList.push_back(Include.second);
588
589  // Deduplicate and remember index.
590  RemoveDuplicates(SearchList, 0, Verbose);
591  unsigned NumQuoted = SearchList.size();
592
593  for (auto &Include : IncludePath)
594    if (Include.first == Angled || Include.first == IndexHeaderMap)
595      SearchList.push_back(Include.second);
596
597  RemoveDuplicates(SearchList, NumQuoted, Verbose);
598  unsigned NumAngled = SearchList.size();
599
600  for (auto &Include : IncludePath)
601    if (Include.first == System || Include.first == ExternCSystem ||
602        (!Lang.ObjC1 && !Lang.CPlusPlus && Include.first == CSystem) ||
603        (/*FIXME !Lang.ObjC1 && */ Lang.CPlusPlus &&
604         Include.first == CXXSystem) ||
605        (Lang.ObjC1 && !Lang.CPlusPlus && Include.first == ObjCSystem) ||
606        (Lang.ObjC1 && Lang.CPlusPlus && Include.first == ObjCXXSystem))
607      SearchList.push_back(Include.second);
608
609  for (auto &Include : IncludePath)
610    if (Include.first == After)
611      SearchList.push_back(Include.second);
612
613  // Remove duplicates across both the Angled and System directories.  GCC does
614  // this and failing to remove duplicates across these two groups breaks
615  // #include_next.
616  unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose);
617  NumAngled -= NonSystemRemoved;
618
619  bool DontSearchCurDir = false;  // TODO: set to true if -I- is set?
620  Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir);
621
622  Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes);
623
624  // If verbose, print the list of directories that will be searched.
625  if (Verbose) {
626    llvm::errs() << "#include \"...\" search starts here:\n";
627    for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
628      if (i == NumQuoted)
629        llvm::errs() << "#include <...> search starts here:\n";
630      const char *Name = SearchList[i].getName();
631      const char *Suffix;
632      if (SearchList[i].isNormalDir())
633        Suffix = "";
634      else if (SearchList[i].isFramework())
635        Suffix = " (framework directory)";
636      else {
637        assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup");
638        Suffix = " (headermap)";
639      }
640      llvm::errs() << " " << Name << Suffix << "\n";
641    }
642    llvm::errs() << "End of search list.\n";
643  }
644}
645
646void clang::ApplyHeaderSearchOptions(HeaderSearch &HS,
647                                     const HeaderSearchOptions &HSOpts,
648                                     const LangOptions &Lang,
649                                     const llvm::Triple &Triple) {
650  InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot);
651
652  // Add the user defined entries.
653  for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) {
654    const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i];
655    if (E.IgnoreSysRoot) {
656      Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework);
657    } else {
658      Init.AddPath(E.Path, E.Group, E.IsFramework);
659    }
660  }
661
662  Init.AddDefaultIncludePaths(Lang, Triple, HSOpts);
663
664  for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i)
665    Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix,
666                               HSOpts.SystemHeaderPrefixes[i].IsSystemHeader);
667
668  if (HSOpts.UseBuiltinIncludes) {
669    // Set up the builtin include directory in the module map.
670    SmallString<128> P = StringRef(HSOpts.ResourceDir);
671    llvm::sys::path::append(P, "include");
672    if (const DirectoryEntry *Dir = HS.getFileMgr().getDirectory(P))
673      HS.getModuleMap().setBuiltinIncludeDir(Dir);
674  }
675
676  Init.Realize(Lang);
677}
678