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/DiagnosticFrontend.h" 14 #include "clang/Basic/FileManager.h" 15 #include "clang/Basic/LangOptions.h" 16 #include "clang/Config/config.h" // C_INCLUDE_DIRS 17 #include "clang/Lex/HeaderMap.h" 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/Twine.h" 25 #include "llvm/Support/ErrorHandling.h" 26 #include "llvm/Support/Path.h" 27 #include "llvm/Support/raw_ostream.h" 28 #include "llvm/TargetParser/Triple.h" 29 #include <optional> 30 31 using namespace clang; 32 using namespace clang::frontend; 33 34 namespace { 35 /// Holds information about a single DirectoryLookup object. 36 struct DirectoryLookupInfo { 37 IncludeDirGroup Group; 38 DirectoryLookup Lookup; 39 std::optional<unsigned> UserEntryIdx; 40 41 DirectoryLookupInfo(IncludeDirGroup Group, DirectoryLookup Lookup, 42 std::optional<unsigned> UserEntryIdx) 43 : Group(Group), Lookup(Lookup), UserEntryIdx(UserEntryIdx) {} 44 }; 45 46 /// This class makes it easier to set the search paths of a HeaderSearch object. 47 /// InitHeaderSearch stores several search path lists internally, which can be 48 /// sent to a HeaderSearch object in one swoop. 49 class InitHeaderSearch { 50 std::vector<DirectoryLookupInfo> IncludePath; 51 std::vector<std::pair<std::string, bool> > SystemHeaderPrefixes; 52 HeaderSearch &Headers; 53 bool Verbose; 54 std::string IncludeSysroot; 55 bool HasSysroot; 56 57 public: 58 InitHeaderSearch(HeaderSearch &HS, bool verbose, StringRef sysroot) 59 : Headers(HS), Verbose(verbose), IncludeSysroot(std::string(sysroot)), 60 HasSysroot(!(sysroot.empty() || sysroot == "/")) {} 61 62 /// Add the specified path to the specified group list, prefixing the sysroot 63 /// if used. 64 /// Returns true if the path exists, false if it was ignored. 65 bool AddPath(const Twine &Path, IncludeDirGroup Group, bool isFramework, 66 std::optional<unsigned> UserEntryIdx = std::nullopt); 67 68 /// Add the specified path to the specified group list, without performing any 69 /// sysroot remapping. 70 /// Returns true if the path exists, false if it was ignored. 71 bool AddUnmappedPath(const Twine &Path, IncludeDirGroup Group, 72 bool isFramework, 73 std::optional<unsigned> UserEntryIdx = std::nullopt); 74 75 /// Add the specified prefix to the system header prefix list. 76 void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) { 77 SystemHeaderPrefixes.emplace_back(std::string(Prefix), IsSystemHeader); 78 } 79 80 /// Add the necessary paths to support a gnu libstdc++. 81 /// Returns true if the \p Base path was found, false if it does not exist. 82 bool AddGnuCPlusPlusIncludePaths(StringRef Base, StringRef ArchDir, 83 StringRef Dir32, StringRef Dir64, 84 const llvm::Triple &triple); 85 86 /// Add the necessary paths to support a MinGW libstdc++. 87 void AddMinGWCPlusPlusIncludePaths(StringRef Base, 88 StringRef Arch, 89 StringRef Version); 90 91 /// Add paths that should always be searched. 92 void AddDefaultCIncludePaths(const llvm::Triple &triple, 93 const HeaderSearchOptions &HSOpts); 94 95 /// Add paths that should be searched when compiling c++. 96 void AddDefaultCPlusPlusIncludePaths(const LangOptions &LangOpts, 97 const llvm::Triple &triple, 98 const HeaderSearchOptions &HSOpts); 99 100 /// Returns true iff AddDefaultIncludePaths should do anything. If this 101 /// returns false, include paths should instead be handled in the driver. 102 bool ShouldAddDefaultIncludePaths(const llvm::Triple &triple); 103 104 /// Adds the default system include paths so that e.g. stdio.h is found. 105 void AddDefaultIncludePaths(const LangOptions &Lang, 106 const llvm::Triple &triple, 107 const HeaderSearchOptions &HSOpts); 108 109 /// Merges all search path lists into one list and send it to HeaderSearch. 110 void Realize(const LangOptions &Lang); 111 }; 112 113 } // end anonymous namespace. 114 115 static bool CanPrefixSysroot(StringRef Path) { 116 #if defined(_WIN32) 117 return !Path.empty() && llvm::sys::path::is_separator(Path[0]); 118 #else 119 return llvm::sys::path::is_absolute(Path); 120 #endif 121 } 122 123 bool InitHeaderSearch::AddPath(const Twine &Path, IncludeDirGroup Group, 124 bool isFramework, 125 std::optional<unsigned> UserEntryIdx) { 126 // Add the path with sysroot prepended, if desired and this is a system header 127 // group. 128 if (HasSysroot) { 129 SmallString<256> MappedPathStorage; 130 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage); 131 if (CanPrefixSysroot(MappedPathStr)) { 132 return AddUnmappedPath(IncludeSysroot + Path, Group, isFramework, 133 UserEntryIdx); 134 } 135 } 136 137 return AddUnmappedPath(Path, Group, isFramework, UserEntryIdx); 138 } 139 140 bool InitHeaderSearch::AddUnmappedPath(const Twine &Path, IncludeDirGroup Group, 141 bool isFramework, 142 std::optional<unsigned> UserEntryIdx) { 143 assert(!Path.isTriviallyEmpty() && "can't handle empty path here"); 144 145 FileManager &FM = Headers.getFileMgr(); 146 SmallString<256> MappedPathStorage; 147 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage); 148 149 // If use system headers while cross-compiling, emit the warning. 150 if (HasSysroot && (MappedPathStr.startswith("/usr/include") || 151 MappedPathStr.startswith("/usr/local/include"))) { 152 Headers.getDiags().Report(diag::warn_poison_system_directories) 153 << MappedPathStr; 154 } 155 156 // Compute the DirectoryLookup type. 157 SrcMgr::CharacteristicKind Type; 158 if (Group == Quoted || Group == Angled || Group == IndexHeaderMap) { 159 Type = SrcMgr::C_User; 160 } else if (Group == ExternCSystem) { 161 Type = SrcMgr::C_ExternCSystem; 162 } else { 163 Type = SrcMgr::C_System; 164 } 165 166 // If the directory exists, add it. 167 if (auto DE = FM.getOptionalDirectoryRef(MappedPathStr)) { 168 IncludePath.emplace_back(Group, DirectoryLookup(*DE, Type, isFramework), 169 UserEntryIdx); 170 return true; 171 } 172 173 // Check to see if this is an apple-style headermap (which are not allowed to 174 // be frameworks). 175 if (!isFramework) { 176 if (auto FE = FM.getFile(MappedPathStr)) { 177 if (const HeaderMap *HM = Headers.CreateHeaderMap(*FE)) { 178 // It is a headermap, add it to the search path. 179 IncludePath.emplace_back( 180 Group, DirectoryLookup(HM, Type, Group == IndexHeaderMap), 181 UserEntryIdx); 182 return true; 183 } 184 } 185 } 186 187 if (Verbose) 188 llvm::errs() << "ignoring nonexistent directory \"" 189 << MappedPathStr << "\"\n"; 190 return false; 191 } 192 193 bool InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base, 194 StringRef ArchDir, 195 StringRef Dir32, 196 StringRef Dir64, 197 const llvm::Triple &triple) { 198 // Add the base dir 199 bool IsBaseFound = AddPath(Base, CXXSystem, false); 200 201 // Add the multilib dirs 202 llvm::Triple::ArchType arch = triple.getArch(); 203 bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64; 204 if (is64bit) 205 AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, false); 206 else 207 AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, false); 208 209 // Add the backward dir 210 AddPath(Base + "/backward", CXXSystem, false); 211 return IsBaseFound; 212 } 213 214 void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base, 215 StringRef Arch, 216 StringRef Version) { 217 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++", 218 CXXSystem, false); 219 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch, 220 CXXSystem, false); 221 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward", 222 CXXSystem, false); 223 } 224 225 void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple, 226 const HeaderSearchOptions &HSOpts) { 227 if (!ShouldAddDefaultIncludePaths(triple)) 228 llvm_unreachable("Include management is handled in the driver."); 229 230 llvm::Triple::OSType os = triple.getOS(); 231 232 if (HSOpts.UseStandardSystemIncludes) { 233 switch (os) { 234 case llvm::Triple::CloudABI: 235 case llvm::Triple::NaCl: 236 case llvm::Triple::ELFIAMCU: 237 break; 238 case llvm::Triple::Win32: 239 if (triple.getEnvironment() != llvm::Triple::Cygnus) 240 break; 241 [[fallthrough]]; 242 default: 243 // FIXME: temporary hack: hard-coded paths. 244 AddPath("/usr/local/include", System, false); 245 break; 246 } 247 } 248 249 // Builtin includes use #include_next directives and should be positioned 250 // just prior C include dirs. 251 if (HSOpts.UseBuiltinIncludes) { 252 // Ignore the sys root, we *always* look for clang headers relative to 253 // supplied path. 254 SmallString<128> P = StringRef(HSOpts.ResourceDir); 255 llvm::sys::path::append(P, "include"); 256 AddUnmappedPath(P, ExternCSystem, false); 257 } 258 259 // All remaining additions are for system include directories, early exit if 260 // we aren't using them. 261 if (!HSOpts.UseStandardSystemIncludes) 262 return; 263 264 // Add dirs specified via 'configure --with-c-include-dirs'. 265 StringRef CIncludeDirs(C_INCLUDE_DIRS); 266 if (CIncludeDirs != "") { 267 SmallVector<StringRef, 5> dirs; 268 CIncludeDirs.split(dirs, ":"); 269 for (StringRef dir : dirs) 270 AddPath(dir, ExternCSystem, false); 271 return; 272 } 273 274 switch (os) { 275 case llvm::Triple::CloudABI: { 276 // <sysroot>/<triple>/include 277 SmallString<128> P = StringRef(HSOpts.ResourceDir); 278 llvm::sys::path::append(P, "../../..", triple.str(), "include"); 279 AddPath(P, System, false); 280 break; 281 } 282 283 case llvm::Triple::Haiku: 284 AddPath("/boot/system/non-packaged/develop/headers", System, false); 285 AddPath("/boot/system/develop/headers/os", System, false); 286 AddPath("/boot/system/develop/headers/os/app", System, false); 287 AddPath("/boot/system/develop/headers/os/arch", System, false); 288 AddPath("/boot/system/develop/headers/os/device", System, false); 289 AddPath("/boot/system/develop/headers/os/drivers", System, false); 290 AddPath("/boot/system/develop/headers/os/game", System, false); 291 AddPath("/boot/system/develop/headers/os/interface", System, false); 292 AddPath("/boot/system/develop/headers/os/kernel", System, false); 293 AddPath("/boot/system/develop/headers/os/locale", System, false); 294 AddPath("/boot/system/develop/headers/os/mail", System, false); 295 AddPath("/boot/system/develop/headers/os/media", System, false); 296 AddPath("/boot/system/develop/headers/os/midi", System, false); 297 AddPath("/boot/system/develop/headers/os/midi2", System, false); 298 AddPath("/boot/system/develop/headers/os/net", System, false); 299 AddPath("/boot/system/develop/headers/os/opengl", System, false); 300 AddPath("/boot/system/develop/headers/os/storage", System, false); 301 AddPath("/boot/system/develop/headers/os/support", System, false); 302 AddPath("/boot/system/develop/headers/os/translation", System, false); 303 AddPath("/boot/system/develop/headers/os/add-ons/graphics", System, false); 304 AddPath("/boot/system/develop/headers/os/add-ons/input_server", System, false); 305 AddPath("/boot/system/develop/headers/os/add-ons/mail_daemon", System, false); 306 AddPath("/boot/system/develop/headers/os/add-ons/registrar", System, false); 307 AddPath("/boot/system/develop/headers/os/add-ons/screen_saver", System, false); 308 AddPath("/boot/system/develop/headers/os/add-ons/tracker", System, false); 309 AddPath("/boot/system/develop/headers/os/be_apps/Deskbar", System, false); 310 AddPath("/boot/system/develop/headers/os/be_apps/NetPositive", System, false); 311 AddPath("/boot/system/develop/headers/os/be_apps/Tracker", System, false); 312 AddPath("/boot/system/develop/headers/3rdparty", System, false); 313 AddPath("/boot/system/develop/headers/bsd", System, false); 314 AddPath("/boot/system/develop/headers/glibc", System, false); 315 AddPath("/boot/system/develop/headers/posix", System, false); 316 AddPath("/boot/system/develop/headers", System, false); 317 break; 318 case llvm::Triple::RTEMS: 319 break; 320 case llvm::Triple::Win32: 321 switch (triple.getEnvironment()) { 322 default: llvm_unreachable("Include management is handled in the driver."); 323 case llvm::Triple::Cygnus: 324 AddPath("/usr/include/w32api", System, false); 325 break; 326 case llvm::Triple::GNU: 327 break; 328 } 329 break; 330 default: 331 break; 332 } 333 334 switch (os) { 335 case llvm::Triple::CloudABI: 336 case llvm::Triple::RTEMS: 337 case llvm::Triple::NaCl: 338 case llvm::Triple::ELFIAMCU: 339 break; 340 default: 341 AddPath("/usr/include", ExternCSystem, false); 342 break; 343 } 344 } 345 346 void InitHeaderSearch::AddDefaultCPlusPlusIncludePaths( 347 const LangOptions &LangOpts, const llvm::Triple &triple, 348 const HeaderSearchOptions &HSOpts) { 349 if (!ShouldAddDefaultIncludePaths(triple)) 350 llvm_unreachable("Include management is handled in the driver."); 351 352 // FIXME: temporary hack: hard-coded paths. 353 llvm::Triple::OSType os = triple.getOS(); 354 switch (os) { 355 case llvm::Triple::Win32: 356 switch (triple.getEnvironment()) { 357 default: llvm_unreachable("Include management is handled in the driver."); 358 case llvm::Triple::Cygnus: 359 // Cygwin-1.7 360 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3"); 361 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3"); 362 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4"); 363 // g++-4 / Cygwin-1.5 364 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2"); 365 break; 366 } 367 break; 368 case llvm::Triple::DragonFly: 369 AddPath("/usr/include/c++/5.0", CXXSystem, false); 370 break; 371 case llvm::Triple::Minix: 372 AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3", 373 "", "", "", triple); 374 break; 375 default: 376 break; 377 } 378 } 379 380 bool InitHeaderSearch::ShouldAddDefaultIncludePaths( 381 const llvm::Triple &triple) { 382 switch (triple.getOS()) { 383 case llvm::Triple::AIX: 384 case llvm::Triple::Emscripten: 385 case llvm::Triple::FreeBSD: 386 case llvm::Triple::NetBSD: 387 case llvm::Triple::OpenBSD: 388 case llvm::Triple::PS4: 389 case llvm::Triple::PS5: 390 case llvm::Triple::Fuchsia: 391 case llvm::Triple::Hurd: 392 case llvm::Triple::Linux: 393 case llvm::Triple::Solaris: 394 case llvm::Triple::WASI: 395 return false; 396 397 case llvm::Triple::Win32: 398 if (triple.getEnvironment() != llvm::Triple::Cygnus || 399 triple.isOSBinFormatMachO()) 400 return false; 401 break; 402 403 case llvm::Triple::UnknownOS: 404 if (triple.isWasm()) 405 return false; 406 break; 407 408 default: 409 break; 410 } 411 412 return true; // Everything else uses AddDefaultIncludePaths(). 413 } 414 415 void InitHeaderSearch::AddDefaultIncludePaths( 416 const LangOptions &Lang, const llvm::Triple &triple, 417 const HeaderSearchOptions &HSOpts) { 418 // NB: This code path is going away. All of the logic is moving into the 419 // driver which has the information necessary to do target-specific 420 // selections of default include paths. Each target which moves there will be 421 // exempted from this logic in ShouldAddDefaultIncludePaths() until we can 422 // delete the entire pile of code. 423 if (!ShouldAddDefaultIncludePaths(triple)) 424 return; 425 426 // NOTE: some additional header search logic is handled in the driver for 427 // Darwin. 428 if (triple.isOSDarwin()) { 429 if (HSOpts.UseStandardSystemIncludes) { 430 // Add the default framework include paths on Darwin. 431 if (triple.isDriverKit()) { 432 AddPath("/System/DriverKit/System/Library/Frameworks", System, true); 433 } else { 434 AddPath("/System/Library/Frameworks", System, true); 435 AddPath("/Library/Frameworks", System, true); 436 } 437 } 438 return; 439 } 440 441 if (Lang.CPlusPlus && !Lang.AsmPreprocessor && 442 HSOpts.UseStandardCXXIncludes && HSOpts.UseStandardSystemIncludes) { 443 if (HSOpts.UseLibcxx) { 444 AddPath("/usr/include/c++/v1", CXXSystem, false); 445 } else { 446 AddDefaultCPlusPlusIncludePaths(Lang, triple, HSOpts); 447 } 448 } 449 450 AddDefaultCIncludePaths(triple, HSOpts); 451 } 452 453 /// If there are duplicate directory entries in the specified search list, 454 /// remove the later (dead) ones. Returns the number of non-system headers 455 /// removed, which is used to update NumAngled. 456 static unsigned RemoveDuplicates(std::vector<DirectoryLookupInfo> &SearchList, 457 unsigned First, bool Verbose) { 458 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs; 459 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs; 460 llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps; 461 unsigned NonSystemRemoved = 0; 462 for (unsigned i = First; i != SearchList.size(); ++i) { 463 unsigned DirToRemove = i; 464 465 const DirectoryLookup &CurEntry = SearchList[i].Lookup; 466 467 if (CurEntry.isNormalDir()) { 468 // If this isn't the first time we've seen this dir, remove it. 469 if (SeenDirs.insert(CurEntry.getDir()).second) 470 continue; 471 } else if (CurEntry.isFramework()) { 472 // If this isn't the first time we've seen this framework dir, remove it. 473 if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second) 474 continue; 475 } else { 476 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 477 // If this isn't the first time we've seen this headermap, remove it. 478 if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second) 479 continue; 480 } 481 482 // If we have a normal #include dir/framework/headermap that is shadowed 483 // later in the chain by a system include location, we actually want to 484 // ignore the user's request and drop the user dir... keeping the system 485 // dir. This is weird, but required to emulate GCC's search path correctly. 486 // 487 // Since dupes of system dirs are rare, just rescan to find the original 488 // that we're nuking instead of using a DenseMap. 489 if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) { 490 // Find the dir that this is the same of. 491 unsigned FirstDir; 492 for (FirstDir = First;; ++FirstDir) { 493 assert(FirstDir != i && "Didn't find dupe?"); 494 495 const DirectoryLookup &SearchEntry = SearchList[FirstDir].Lookup; 496 497 // If these are different lookup types, then they can't be the dupe. 498 if (SearchEntry.getLookupType() != CurEntry.getLookupType()) 499 continue; 500 501 bool isSame; 502 if (CurEntry.isNormalDir()) 503 isSame = SearchEntry.getDir() == CurEntry.getDir(); 504 else if (CurEntry.isFramework()) 505 isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir(); 506 else { 507 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 508 isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap(); 509 } 510 511 if (isSame) 512 break; 513 } 514 515 // If the first dir in the search path is a non-system dir, zap it 516 // instead of the system one. 517 if (SearchList[FirstDir].Lookup.getDirCharacteristic() == SrcMgr::C_User) 518 DirToRemove = FirstDir; 519 } 520 521 if (Verbose) { 522 llvm::errs() << "ignoring duplicate directory \"" 523 << CurEntry.getName() << "\"\n"; 524 if (DirToRemove != i) 525 llvm::errs() << " as it is a non-system directory that duplicates " 526 << "a system directory\n"; 527 } 528 if (DirToRemove != i) 529 ++NonSystemRemoved; 530 531 // This is reached if the current entry is a duplicate. Remove the 532 // DirToRemove (usually the current dir). 533 SearchList.erase(SearchList.begin()+DirToRemove); 534 --i; 535 } 536 return NonSystemRemoved; 537 } 538 539 /// Extract DirectoryLookups from DirectoryLookupInfos. 540 static std::vector<DirectoryLookup> 541 extractLookups(const std::vector<DirectoryLookupInfo> &Infos) { 542 std::vector<DirectoryLookup> Lookups; 543 Lookups.reserve(Infos.size()); 544 llvm::transform(Infos, std::back_inserter(Lookups), 545 [](const DirectoryLookupInfo &Info) { return Info.Lookup; }); 546 return Lookups; 547 } 548 549 /// Collect the mapping between indices of DirectoryLookups and UserEntries. 550 static llvm::DenseMap<unsigned, unsigned> 551 mapToUserEntries(const std::vector<DirectoryLookupInfo> &Infos) { 552 llvm::DenseMap<unsigned, unsigned> LookupsToUserEntries; 553 for (unsigned I = 0, E = Infos.size(); I < E; ++I) { 554 // Check whether this DirectoryLookup maps to a HeaderSearch::UserEntry. 555 if (Infos[I].UserEntryIdx) 556 LookupsToUserEntries.insert({I, *Infos[I].UserEntryIdx}); 557 } 558 return LookupsToUserEntries; 559 } 560 561 void InitHeaderSearch::Realize(const LangOptions &Lang) { 562 // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList. 563 std::vector<DirectoryLookupInfo> SearchList; 564 SearchList.reserve(IncludePath.size()); 565 566 // Quoted arguments go first. 567 for (auto &Include : IncludePath) 568 if (Include.Group == Quoted) 569 SearchList.push_back(Include); 570 571 // Deduplicate and remember index. 572 RemoveDuplicates(SearchList, 0, Verbose); 573 unsigned NumQuoted = SearchList.size(); 574 575 for (auto &Include : IncludePath) 576 if (Include.Group == Angled || Include.Group == IndexHeaderMap) 577 SearchList.push_back(Include); 578 579 RemoveDuplicates(SearchList, NumQuoted, Verbose); 580 unsigned NumAngled = SearchList.size(); 581 582 for (auto &Include : IncludePath) 583 if (Include.Group == System || Include.Group == ExternCSystem || 584 (!Lang.ObjC && !Lang.CPlusPlus && Include.Group == CSystem) || 585 (/*FIXME !Lang.ObjC && */ Lang.CPlusPlus && 586 Include.Group == CXXSystem) || 587 (Lang.ObjC && !Lang.CPlusPlus && Include.Group == ObjCSystem) || 588 (Lang.ObjC && Lang.CPlusPlus && Include.Group == ObjCXXSystem)) 589 SearchList.push_back(Include); 590 591 for (auto &Include : IncludePath) 592 if (Include.Group == After) 593 SearchList.push_back(Include); 594 595 // Remove duplicates across both the Angled and System directories. GCC does 596 // this and failing to remove duplicates across these two groups breaks 597 // #include_next. 598 unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose); 599 NumAngled -= NonSystemRemoved; 600 601 bool DontSearchCurDir = false; // TODO: set to true if -I- is set? 602 Headers.SetSearchPaths(extractLookups(SearchList), NumQuoted, NumAngled, 603 DontSearchCurDir, mapToUserEntries(SearchList)); 604 605 Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes); 606 607 // If verbose, print the list of directories that will be searched. 608 if (Verbose) { 609 llvm::errs() << "#include \"...\" search starts here:\n"; 610 for (unsigned i = 0, e = SearchList.size(); i != e; ++i) { 611 if (i == NumQuoted) 612 llvm::errs() << "#include <...> search starts here:\n"; 613 StringRef Name = SearchList[i].Lookup.getName(); 614 const char *Suffix; 615 if (SearchList[i].Lookup.isNormalDir()) 616 Suffix = ""; 617 else if (SearchList[i].Lookup.isFramework()) 618 Suffix = " (framework directory)"; 619 else { 620 assert(SearchList[i].Lookup.isHeaderMap() && "Unknown DirectoryLookup"); 621 Suffix = " (headermap)"; 622 } 623 llvm::errs() << " " << Name << Suffix << "\n"; 624 } 625 llvm::errs() << "End of search list.\n"; 626 } 627 } 628 629 void clang::ApplyHeaderSearchOptions(HeaderSearch &HS, 630 const HeaderSearchOptions &HSOpts, 631 const LangOptions &Lang, 632 const llvm::Triple &Triple) { 633 InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot); 634 635 // Add the user defined entries. 636 for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) { 637 const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i]; 638 if (E.IgnoreSysRoot) { 639 Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework, i); 640 } else { 641 Init.AddPath(E.Path, E.Group, E.IsFramework, i); 642 } 643 } 644 645 Init.AddDefaultIncludePaths(Lang, Triple, HSOpts); 646 647 for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i) 648 Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix, 649 HSOpts.SystemHeaderPrefixes[i].IsSystemHeader); 650 651 if (HSOpts.UseBuiltinIncludes) { 652 // Set up the builtin include directory in the module map. 653 SmallString<128> P = StringRef(HSOpts.ResourceDir); 654 llvm::sys::path::append(P, "include"); 655 if (auto Dir = HS.getFileMgr().getOptionalDirectoryRef(P)) 656 HS.getModuleMap().setBuiltinIncludeDir(*Dir); 657 } 658 659 Init.Realize(Lang); 660 } 661