1 //===--- InitHeaderSearch.cpp - Initialize header search paths ------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the InitHeaderSearch class.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "clang/Basic/FileManager.h"
14 #include "clang/Basic/LangOptions.h"
15 #include "clang/Config/config.h" // C_INCLUDE_DIRS
16 #include "clang/Frontend/FrontendDiagnostic.h"
17 #include "clang/Frontend/Utils.h"
18 #include "clang/Lex/HeaderMap.h"
19 #include "clang/Lex/HeaderSearch.h"
20 #include "clang/Lex/HeaderSearchOptions.h"
21 #include "llvm/ADT/SmallPtrSet.h"
22 #include "llvm/ADT/SmallString.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/Triple.h"
26 #include "llvm/ADT/Twine.h"
27 #include "llvm/Support/ErrorHandling.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
InitHeaderSearch(HeaderSearch & HS,bool verbose,StringRef sysroot)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 /// Returns true if the path exists, false if it was ignored.
59 bool AddPath(const Twine &Path, IncludeDirGroup Group, bool isFramework);
60
61 /// AddUnmappedPath - Add the specified path to the specified group list,
62 /// without performing any sysroot remapping.
63 /// Returns true if the path exists, false if it was ignored.
64 bool AddUnmappedPath(const Twine &Path, IncludeDirGroup Group,
65 bool isFramework);
66
67 /// AddSystemHeaderPrefix - Add the specified prefix to the system header
68 /// prefix list.
AddSystemHeaderPrefix(StringRef Prefix,bool IsSystemHeader)69 void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) {
70 SystemHeaderPrefixes.emplace_back(Prefix, IsSystemHeader);
71 }
72
73 /// AddGnuCPlusPlusIncludePaths - Add the necessary paths to support a gnu
74 /// libstdc++.
75 /// Returns true if the \p Base path was found, false if it does not exist.
76 bool AddGnuCPlusPlusIncludePaths(StringRef Base, StringRef ArchDir,
77 StringRef Dir32, StringRef Dir64,
78 const llvm::Triple &triple);
79
80 /// AddMinGWCPlusPlusIncludePaths - Add the necessary paths to support a MinGW
81 /// libstdc++.
82 void AddMinGWCPlusPlusIncludePaths(StringRef Base,
83 StringRef Arch,
84 StringRef Version);
85
86 // AddDefaultCIncludePaths - Add paths that should always be searched.
87 void AddDefaultCIncludePaths(const llvm::Triple &triple,
88 const HeaderSearchOptions &HSOpts);
89
90 // AddDefaultCPlusPlusIncludePaths - Add paths that should be searched when
91 // compiling c++.
92 void AddDefaultCPlusPlusIncludePaths(const LangOptions &LangOpts,
93 const llvm::Triple &triple,
94 const HeaderSearchOptions &HSOpts);
95
96 /// AddDefaultSystemIncludePaths - Adds the default system include paths so
97 /// that e.g. stdio.h is found.
98 void AddDefaultIncludePaths(const LangOptions &Lang,
99 const llvm::Triple &triple,
100 const HeaderSearchOptions &HSOpts);
101
102 /// Realize - Merges all search path lists into one list and send it to
103 /// HeaderSearch.
104 void Realize(const LangOptions &Lang);
105 };
106
107 } // end anonymous namespace.
108
CanPrefixSysroot(StringRef Path)109 static bool CanPrefixSysroot(StringRef Path) {
110 #if defined(_WIN32)
111 return !Path.empty() && llvm::sys::path::is_separator(Path[0]);
112 #else
113 return llvm::sys::path::is_absolute(Path);
114 #endif
115 }
116
AddPath(const Twine & Path,IncludeDirGroup Group,bool isFramework)117 bool InitHeaderSearch::AddPath(const Twine &Path, IncludeDirGroup Group,
118 bool isFramework) {
119 // Add the path with sysroot prepended, if desired and this is a system header
120 // group.
121 if (HasSysroot) {
122 SmallString<256> MappedPathStorage;
123 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage);
124 if (CanPrefixSysroot(MappedPathStr)) {
125 return AddUnmappedPath(IncludeSysroot + Path, Group, isFramework);
126 }
127 }
128
129 return AddUnmappedPath(Path, Group, isFramework);
130 }
131
AddUnmappedPath(const Twine & Path,IncludeDirGroup Group,bool isFramework)132 bool InitHeaderSearch::AddUnmappedPath(const Twine &Path, IncludeDirGroup Group,
133 bool isFramework) {
134 assert(!Path.isTriviallyEmpty() && "can't handle empty path here");
135
136 FileManager &FM = Headers.getFileMgr();
137 SmallString<256> MappedPathStorage;
138 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage);
139
140 // Compute the DirectoryLookup type.
141 SrcMgr::CharacteristicKind Type;
142 if (Group == Quoted || Group == Angled || Group == IndexHeaderMap) {
143 Type = SrcMgr::C_User;
144 } else if (Group == ExternCSystem) {
145 Type = SrcMgr::C_ExternCSystem;
146 } else {
147 Type = SrcMgr::C_System;
148 }
149
150 // If the directory exists, add it.
151 if (const DirectoryEntry *DE = FM.getDirectory(MappedPathStr)) {
152 IncludePath.push_back(
153 std::make_pair(Group, DirectoryLookup(DE, Type, isFramework)));
154 return true;
155 }
156
157 // Check to see if this is an apple-style headermap (which are not allowed to
158 // be frameworks).
159 if (!isFramework) {
160 if (const FileEntry *FE = FM.getFile(MappedPathStr)) {
161 if (const HeaderMap *HM = Headers.CreateHeaderMap(FE)) {
162 // It is a headermap, add it to the search path.
163 IncludePath.push_back(
164 std::make_pair(Group,
165 DirectoryLookup(HM, Type, Group == IndexHeaderMap)));
166 return true;
167 }
168 }
169 }
170
171 if (Verbose)
172 llvm::errs() << "ignoring nonexistent directory \""
173 << MappedPathStr << "\"\n";
174 return false;
175 }
176
AddGnuCPlusPlusIncludePaths(StringRef Base,StringRef ArchDir,StringRef Dir32,StringRef Dir64,const llvm::Triple & triple)177 bool InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base,
178 StringRef ArchDir,
179 StringRef Dir32,
180 StringRef Dir64,
181 const llvm::Triple &triple) {
182 // Add the base dir
183 bool IsBaseFound = AddPath(Base, CXXSystem, false);
184
185 // Add the multilib dirs
186 llvm::Triple::ArchType arch = triple.getArch();
187 bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64;
188 if (is64bit)
189 AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, false);
190 else
191 AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, false);
192
193 // Add the backward dir
194 AddPath(Base + "/backward", CXXSystem, false);
195 return IsBaseFound;
196 }
197
AddMinGWCPlusPlusIncludePaths(StringRef Base,StringRef Arch,StringRef Version)198 void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base,
199 StringRef Arch,
200 StringRef Version) {
201 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++",
202 CXXSystem, false);
203 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch,
204 CXXSystem, false);
205 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward",
206 CXXSystem, false);
207 }
208
AddDefaultCIncludePaths(const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)209 void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
210 const HeaderSearchOptions &HSOpts) {
211 llvm::Triple::OSType os = triple.getOS();
212
213 if (triple.isOSDarwin()) {
214 llvm_unreachable("Include management is handled in the driver.");
215 }
216
217 if (HSOpts.UseStandardSystemIncludes) {
218 switch (os) {
219 case llvm::Triple::CloudABI:
220 case llvm::Triple::FreeBSD:
221 case llvm::Triple::NetBSD:
222 case llvm::Triple::OpenBSD:
223 case llvm::Triple::NaCl:
224 case llvm::Triple::PS4:
225 case llvm::Triple::ELFIAMCU:
226 case llvm::Triple::Fuchsia:
227 break;
228 case llvm::Triple::Win32:
229 if (triple.getEnvironment() != llvm::Triple::Cygnus)
230 break;
231 LLVM_FALLTHROUGH;
232 default:
233 // FIXME: temporary hack: hard-coded paths.
234 AddPath("/usr/local/include", System, false);
235 break;
236 }
237 }
238
239 // Builtin includes use #include_next directives and should be positioned
240 // just prior C include dirs.
241 if (HSOpts.UseBuiltinIncludes) {
242 // Ignore the sys root, we *always* look for clang headers relative to
243 // supplied path.
244 SmallString<128> P = StringRef(HSOpts.ResourceDir);
245 llvm::sys::path::append(P, "include");
246 AddUnmappedPath(P, ExternCSystem, false);
247 }
248
249 // All remaining additions are for system include directories, early exit if
250 // we aren't using them.
251 if (!HSOpts.UseStandardSystemIncludes)
252 return;
253
254 // Add dirs specified via 'configure --with-c-include-dirs'.
255 StringRef CIncludeDirs(C_INCLUDE_DIRS);
256 if (CIncludeDirs != "") {
257 SmallVector<StringRef, 5> dirs;
258 CIncludeDirs.split(dirs, ":");
259 for (StringRef dir : dirs)
260 AddPath(dir, ExternCSystem, false);
261 return;
262 }
263
264 switch (os) {
265 case llvm::Triple::Linux:
266 case llvm::Triple::Hurd:
267 case llvm::Triple::Solaris:
268 llvm_unreachable("Include management is handled in the driver.");
269
270 case llvm::Triple::CloudABI: {
271 // <sysroot>/<triple>/include
272 SmallString<128> P = StringRef(HSOpts.ResourceDir);
273 llvm::sys::path::append(P, "../../..", triple.str(), "include");
274 AddPath(P, System, false);
275 break;
276 }
277
278 case llvm::Triple::Haiku:
279 AddPath("/boot/system/non-packaged/develop/headers", System, false);
280 AddPath("/boot/system/develop/headers/os", System, false);
281 AddPath("/boot/system/develop/headers/os/app", System, false);
282 AddPath("/boot/system/develop/headers/os/arch", System, false);
283 AddPath("/boot/system/develop/headers/os/device", System, false);
284 AddPath("/boot/system/develop/headers/os/drivers", System, false);
285 AddPath("/boot/system/develop/headers/os/game", System, false);
286 AddPath("/boot/system/develop/headers/os/interface", System, false);
287 AddPath("/boot/system/develop/headers/os/kernel", System, false);
288 AddPath("/boot/system/develop/headers/os/locale", System, false);
289 AddPath("/boot/system/develop/headers/os/mail", System, false);
290 AddPath("/boot/system/develop/headers/os/media", System, false);
291 AddPath("/boot/system/develop/headers/os/midi", System, false);
292 AddPath("/boot/system/develop/headers/os/midi2", System, false);
293 AddPath("/boot/system/develop/headers/os/net", System, false);
294 AddPath("/boot/system/develop/headers/os/opengl", System, false);
295 AddPath("/boot/system/develop/headers/os/storage", System, false);
296 AddPath("/boot/system/develop/headers/os/support", System, false);
297 AddPath("/boot/system/develop/headers/os/translation", System, false);
298 AddPath("/boot/system/develop/headers/os/add-ons/graphics", System, false);
299 AddPath("/boot/system/develop/headers/os/add-ons/input_server", System, false);
300 AddPath("/boot/system/develop/headers/os/add-ons/mail_daemon", System, false);
301 AddPath("/boot/system/develop/headers/os/add-ons/registrar", System, false);
302 AddPath("/boot/system/develop/headers/os/add-ons/screen_saver", System, false);
303 AddPath("/boot/system/develop/headers/os/add-ons/tracker", System, false);
304 AddPath("/boot/system/develop/headers/os/be_apps/Deskbar", System, false);
305 AddPath("/boot/system/develop/headers/os/be_apps/NetPositive", System, false);
306 AddPath("/boot/system/develop/headers/os/be_apps/Tracker", System, false);
307 AddPath("/boot/system/develop/headers/3rdparty", System, false);
308 AddPath("/boot/system/develop/headers/bsd", System, false);
309 AddPath("/boot/system/develop/headers/glibc", System, false);
310 AddPath("/boot/system/develop/headers/posix", System, false);
311 AddPath("/boot/system/develop/headers", System, false);
312 break;
313 case llvm::Triple::RTEMS:
314 break;
315 case llvm::Triple::Win32:
316 switch (triple.getEnvironment()) {
317 default: llvm_unreachable("Include management is handled in the driver.");
318 case llvm::Triple::Cygnus:
319 AddPath("/usr/include/w32api", System, false);
320 break;
321 case llvm::Triple::GNU:
322 break;
323 }
324 break;
325 default:
326 break;
327 }
328
329 switch (os) {
330 case llvm::Triple::CloudABI:
331 case llvm::Triple::RTEMS:
332 case llvm::Triple::NaCl:
333 case llvm::Triple::ELFIAMCU:
334 case llvm::Triple::Fuchsia:
335 break;
336 case llvm::Triple::PS4: {
337 // <isysroot> gets prepended later in AddPath().
338 std::string BaseSDKPath = "";
339 if (!HasSysroot) {
340 const char *envValue = getenv("SCE_ORBIS_SDK_DIR");
341 if (envValue)
342 BaseSDKPath = envValue;
343 else {
344 // HSOpts.ResourceDir variable contains the location of Clang's
345 // resource files.
346 // Assuming that Clang is configured for PS4 without
347 // --with-clang-resource-dir option, the location of Clang's resource
348 // files is <SDK_DIR>/host_tools/lib/clang
349 SmallString<128> P = StringRef(HSOpts.ResourceDir);
350 llvm::sys::path::append(P, "../../..");
351 BaseSDKPath = P.str();
352 }
353 }
354 AddPath(BaseSDKPath + "/target/include", System, false);
355 if (triple.isPS4CPU())
356 AddPath(BaseSDKPath + "/target/include_common", System, false);
357 LLVM_FALLTHROUGH;
358 }
359 default:
360 AddPath("/usr/include", ExternCSystem, false);
361 break;
362 }
363 }
364
AddDefaultCPlusPlusIncludePaths(const LangOptions & LangOpts,const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)365 void InitHeaderSearch::AddDefaultCPlusPlusIncludePaths(
366 const LangOptions &LangOpts, const llvm::Triple &triple,
367 const HeaderSearchOptions &HSOpts) {
368 llvm::Triple::OSType os = triple.getOS();
369 // FIXME: temporary hack: hard-coded paths.
370
371 if (triple.isOSDarwin()) {
372 llvm_unreachable("Include management is handled in the driver.");
373 }
374
375 switch (os) {
376 case llvm::Triple::Linux:
377 case llvm::Triple::Hurd:
378 case llvm::Triple::Solaris:
379 llvm_unreachable("Include management is handled in the driver.");
380 break;
381 case llvm::Triple::Win32:
382 switch (triple.getEnvironment()) {
383 default: llvm_unreachable("Include management is handled in the driver.");
384 case llvm::Triple::Cygnus:
385 // Cygwin-1.7
386 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3");
387 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
388 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
389 // g++-4 / Cygwin-1.5
390 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
391 break;
392 }
393 break;
394 case llvm::Triple::DragonFly:
395 AddPath("/usr/include/c++/8.0", CXXSystem, false);
396 break;
397 case llvm::Triple::Minix:
398 AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
399 "", "", "", triple);
400 break;
401 default:
402 break;
403 }
404 }
405
AddDefaultIncludePaths(const LangOptions & Lang,const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)406 void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang,
407 const llvm::Triple &triple,
408 const HeaderSearchOptions &HSOpts) {
409 // NB: This code path is going away. All of the logic is moving into the
410 // driver which has the information necessary to do target-specific
411 // selections of default include paths. Each target which moves there will be
412 // exempted from this logic here until we can delete the entire pile of code.
413 switch (triple.getOS()) {
414 default:
415 break; // Everything else continues to use this routine's logic.
416
417 case llvm::Triple::Emscripten:
418 case llvm::Triple::Linux:
419 case llvm::Triple::Hurd:
420 case llvm::Triple::Solaris:
421 case llvm::Triple::WASI:
422 return;
423
424 case llvm::Triple::Win32:
425 if (triple.getEnvironment() != llvm::Triple::Cygnus ||
426 triple.isOSBinFormatMachO())
427 return;
428 break;
429
430 case llvm::Triple::UnknownOS:
431 if (triple.getArch() == llvm::Triple::wasm32 ||
432 triple.getArch() == llvm::Triple::wasm64)
433 return;
434 break;
435 }
436
437 // All header search logic is handled in the Driver for Darwin.
438 if (triple.isOSDarwin()) {
439 if (HSOpts.UseStandardSystemIncludes) {
440 // Add the default framework include paths on Darwin.
441 AddPath("/System/Library/Frameworks", System, true);
442 AddPath("/Library/Frameworks", System, true);
443 }
444 return;
445 }
446
447 if (Lang.CPlusPlus && !Lang.AsmPreprocessor &&
448 HSOpts.UseStandardCXXIncludes && HSOpts.UseStandardSystemIncludes) {
449 if (HSOpts.UseLibcxx) {
450 AddPath("/usr/include/c++/v1", CXXSystem, false);
451 } else {
452 AddDefaultCPlusPlusIncludePaths(Lang, triple, HSOpts);
453 }
454 }
455
456 AddDefaultCIncludePaths(triple, HSOpts);
457 }
458
459 /// RemoveDuplicates - If there are duplicate directory entries in the specified
460 /// search list, remove the later (dead) ones. Returns the number of non-system
461 /// headers removed, which is used to update NumAngled.
RemoveDuplicates(std::vector<DirectoryLookup> & SearchList,unsigned First,bool Verbose)462 static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList,
463 unsigned First, bool Verbose) {
464 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs;
465 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs;
466 llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps;
467 unsigned NonSystemRemoved = 0;
468 for (unsigned i = First; i != SearchList.size(); ++i) {
469 unsigned DirToRemove = i;
470
471 const DirectoryLookup &CurEntry = SearchList[i];
472
473 if (CurEntry.isNormalDir()) {
474 // If this isn't the first time we've seen this dir, remove it.
475 if (SeenDirs.insert(CurEntry.getDir()).second)
476 continue;
477 } else if (CurEntry.isFramework()) {
478 // If this isn't the first time we've seen this framework dir, remove it.
479 if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second)
480 continue;
481 } else {
482 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
483 // If this isn't the first time we've seen this headermap, remove it.
484 if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second)
485 continue;
486 }
487
488 // If we have a normal #include dir/framework/headermap that is shadowed
489 // later in the chain by a system include location, we actually want to
490 // ignore the user's request and drop the user dir... keeping the system
491 // dir. This is weird, but required to emulate GCC's search path correctly.
492 //
493 // Since dupes of system dirs are rare, just rescan to find the original
494 // that we're nuking instead of using a DenseMap.
495 if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) {
496 // Find the dir that this is the same of.
497 unsigned FirstDir;
498 for (FirstDir = First;; ++FirstDir) {
499 assert(FirstDir != i && "Didn't find dupe?");
500
501 const DirectoryLookup &SearchEntry = SearchList[FirstDir];
502
503 // If these are different lookup types, then they can't be the dupe.
504 if (SearchEntry.getLookupType() != CurEntry.getLookupType())
505 continue;
506
507 bool isSame;
508 if (CurEntry.isNormalDir())
509 isSame = SearchEntry.getDir() == CurEntry.getDir();
510 else if (CurEntry.isFramework())
511 isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir();
512 else {
513 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
514 isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap();
515 }
516
517 if (isSame)
518 break;
519 }
520
521 // If the first dir in the search path is a non-system dir, zap it
522 // instead of the system one.
523 if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User)
524 DirToRemove = FirstDir;
525 }
526
527 if (Verbose) {
528 llvm::errs() << "ignoring duplicate directory \""
529 << CurEntry.getName() << "\"\n";
530 if (DirToRemove != i)
531 llvm::errs() << " as it is a non-system directory that duplicates "
532 << "a system directory\n";
533 }
534 if (DirToRemove != i)
535 ++NonSystemRemoved;
536
537 // This is reached if the current entry is a duplicate. Remove the
538 // DirToRemove (usually the current dir).
539 SearchList.erase(SearchList.begin()+DirToRemove);
540 --i;
541 }
542 return NonSystemRemoved;
543 }
544
545
Realize(const LangOptions & Lang)546 void InitHeaderSearch::Realize(const LangOptions &Lang) {
547 // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
548 std::vector<DirectoryLookup> SearchList;
549 SearchList.reserve(IncludePath.size());
550
551 // Quoted arguments go first.
552 for (auto &Include : IncludePath)
553 if (Include.first == Quoted)
554 SearchList.push_back(Include.second);
555
556 // Deduplicate and remember index.
557 RemoveDuplicates(SearchList, 0, Verbose);
558 unsigned NumQuoted = SearchList.size();
559
560 for (auto &Include : IncludePath)
561 if (Include.first == Angled || Include.first == IndexHeaderMap)
562 SearchList.push_back(Include.second);
563
564 RemoveDuplicates(SearchList, NumQuoted, Verbose);
565 unsigned NumAngled = SearchList.size();
566
567 for (auto &Include : IncludePath)
568 if (Include.first == System || Include.first == ExternCSystem ||
569 (!Lang.ObjC && !Lang.CPlusPlus && Include.first == CSystem) ||
570 (/*FIXME !Lang.ObjC && */ Lang.CPlusPlus &&
571 Include.first == CXXSystem) ||
572 (Lang.ObjC && !Lang.CPlusPlus && Include.first == ObjCSystem) ||
573 (Lang.ObjC && Lang.CPlusPlus && Include.first == ObjCXXSystem))
574 SearchList.push_back(Include.second);
575
576 for (auto &Include : IncludePath)
577 if (Include.first == After)
578 SearchList.push_back(Include.second);
579
580 // Remove duplicates across both the Angled and System directories. GCC does
581 // this and failing to remove duplicates across these two groups breaks
582 // #include_next.
583 unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose);
584 NumAngled -= NonSystemRemoved;
585
586 bool DontSearchCurDir = false; // TODO: set to true if -I- is set?
587 Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir);
588
589 Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes);
590
591 // If verbose, print the list of directories that will be searched.
592 if (Verbose) {
593 llvm::errs() << "#include \"...\" search starts here:\n";
594 for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
595 if (i == NumQuoted)
596 llvm::errs() << "#include <...> search starts here:\n";
597 StringRef Name = SearchList[i].getName();
598 const char *Suffix;
599 if (SearchList[i].isNormalDir())
600 Suffix = "";
601 else if (SearchList[i].isFramework())
602 Suffix = " (framework directory)";
603 else {
604 assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup");
605 Suffix = " (headermap)";
606 }
607 llvm::errs() << " " << Name << Suffix << "\n";
608 }
609 llvm::errs() << "End of search list.\n";
610 }
611 }
612
ApplyHeaderSearchOptions(HeaderSearch & HS,const HeaderSearchOptions & HSOpts,const LangOptions & Lang,const llvm::Triple & Triple)613 void clang::ApplyHeaderSearchOptions(HeaderSearch &HS,
614 const HeaderSearchOptions &HSOpts,
615 const LangOptions &Lang,
616 const llvm::Triple &Triple) {
617 InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot);
618
619 // Add the user defined entries.
620 for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) {
621 const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i];
622 if (E.IgnoreSysRoot) {
623 Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework);
624 } else {
625 Init.AddPath(E.Path, E.Group, E.IsFramework);
626 }
627 }
628
629 Init.AddDefaultIncludePaths(Lang, Triple, HSOpts);
630
631 for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i)
632 Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix,
633 HSOpts.SystemHeaderPrefixes[i].IsSystemHeader);
634
635 if (HSOpts.UseBuiltinIncludes) {
636 // Set up the builtin include directory in the module map.
637 SmallString<128> P = StringRef(HSOpts.ResourceDir);
638 llvm::sys::path::append(P, "include");
639 if (const DirectoryEntry *Dir = HS.getFileMgr().getDirectory(P))
640 HS.getModuleMap().setBuiltinIncludeDir(Dir);
641 }
642
643 Init.Realize(Lang);
644 }
645