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 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 InitHeaderSearch(HeaderSearch &HS, bool verbose, StringRef sysroot) 51 : Headers(HS), Verbose(verbose), IncludeSysroot(std::string(sysroot)), 52 HasSysroot(!(sysroot.empty() || sysroot == "/")) {} 53 54 /// AddPath - Add the specified path to the specified group list, prefixing 55 /// the sysroot if used. 56 /// Returns true if the path exists, false if it was ignored. 57 bool AddPath(const Twine &Path, IncludeDirGroup Group, bool isFramework); 58 59 /// AddUnmappedPath - Add the specified path to the specified group list, 60 /// without performing any sysroot remapping. 61 /// Returns true if the path exists, false if it was ignored. 62 bool 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(std::string(Prefix), IsSystemHeader); 69 } 70 71 /// AddGnuCPlusPlusIncludePaths - Add the necessary paths to support a gnu 72 /// libstdc++. 73 /// Returns true if the \p Base path was found, false if it does not exist. 74 bool AddGnuCPlusPlusIncludePaths(StringRef Base, StringRef ArchDir, 75 StringRef Dir32, StringRef Dir64, 76 const llvm::Triple &triple); 77 78 /// AddMinGWCPlusPlusIncludePaths - Add the necessary paths to support a MinGW 79 /// libstdc++. 80 void AddMinGWCPlusPlusIncludePaths(StringRef Base, 81 StringRef Arch, 82 StringRef Version); 83 84 // AddDefaultCIncludePaths - Add paths that should always be searched. 85 void AddDefaultCIncludePaths(const llvm::Triple &triple, 86 const HeaderSearchOptions &HSOpts); 87 88 // AddDefaultCPlusPlusIncludePaths - Add paths that should be searched when 89 // compiling c++. 90 void AddDefaultCPlusPlusIncludePaths(const LangOptions &LangOpts, 91 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(_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 115bool 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 return AddUnmappedPath(IncludeSysroot + Path, Group, isFramework); 124 } 125 } 126 127 return AddUnmappedPath(Path, Group, isFramework); 128} 129 130bool InitHeaderSearch::AddUnmappedPath(const Twine &Path, IncludeDirGroup Group, 131 bool isFramework) { 132 assert(!Path.isTriviallyEmpty() && "can't handle empty path here"); 133 134 FileManager &FM = Headers.getFileMgr(); 135 SmallString<256> MappedPathStorage; 136 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage); 137 138 // If use system headers while cross-compiling, emit the warning. 139 if (HasSysroot && (MappedPathStr.startswith("/usr/include") || 140 MappedPathStr.startswith("/usr/local/include"))) { 141 Headers.getDiags().Report(diag::warn_poison_system_directories) 142 << MappedPathStr; 143 } 144 145 // Compute the DirectoryLookup type. 146 SrcMgr::CharacteristicKind Type; 147 if (Group == Quoted || Group == Angled || Group == IndexHeaderMap) { 148 Type = SrcMgr::C_User; 149 } else if (Group == ExternCSystem) { 150 Type = SrcMgr::C_ExternCSystem; 151 } else { 152 Type = SrcMgr::C_System; 153 } 154 155 // If the directory exists, add it. 156 if (auto DE = FM.getOptionalDirectoryRef(MappedPathStr)) { 157 IncludePath.push_back( 158 std::make_pair(Group, DirectoryLookup(*DE, Type, isFramework))); 159 return true; 160 } 161 162 // Check to see if this is an apple-style headermap (which are not allowed to 163 // be frameworks). 164 if (!isFramework) { 165 if (auto FE = FM.getFile(MappedPathStr)) { 166 if (const HeaderMap *HM = Headers.CreateHeaderMap(*FE)) { 167 // It is a headermap, add it to the search path. 168 IncludePath.push_back( 169 std::make_pair(Group, 170 DirectoryLookup(HM, Type, Group == IndexHeaderMap))); 171 return true; 172 } 173 } 174 } 175 176 if (Verbose) 177 llvm::errs() << "ignoring nonexistent directory \"" 178 << MappedPathStr << "\"\n"; 179 return false; 180} 181 182bool InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base, 183 StringRef ArchDir, 184 StringRef Dir32, 185 StringRef Dir64, 186 const llvm::Triple &triple) { 187 // Add the base dir 188 bool IsBaseFound = AddPath(Base, CXXSystem, false); 189 190 // Add the multilib dirs 191 llvm::Triple::ArchType arch = triple.getArch(); 192 bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64; 193 if (is64bit) 194 AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, false); 195 else 196 AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, false); 197 198 // Add the backward dir 199 AddPath(Base + "/backward", CXXSystem, false); 200 return IsBaseFound; 201} 202 203void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base, 204 StringRef Arch, 205 StringRef Version) { 206 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++", 207 CXXSystem, false); 208 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch, 209 CXXSystem, false); 210 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward", 211 CXXSystem, false); 212} 213 214void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple, 215 const HeaderSearchOptions &HSOpts) { 216 llvm::Triple::OSType os = triple.getOS(); 217 218 if (triple.isOSDarwin()) { 219 llvm_unreachable("Include management is handled in the driver."); 220 } 221 222 if (HSOpts.UseStandardSystemIncludes) { 223 switch (os) { 224 case llvm::Triple::CloudABI: 225 case llvm::Triple::FreeBSD: 226 case llvm::Triple::NetBSD: 227 case llvm::Triple::OpenBSD: 228 case llvm::Triple::NaCl: 229 case llvm::Triple::PS4: 230 case llvm::Triple::ELFIAMCU: 231 case llvm::Triple::Fuchsia: 232 break; 233 case llvm::Triple::Win32: 234 if (triple.getEnvironment() != llvm::Triple::Cygnus) 235 break; 236 LLVM_FALLTHROUGH; 237 default: 238 // FIXME: temporary hack: hard-coded paths. 239 AddPath("/usr/local/include", System, false); 240 break; 241 } 242 } 243 244 // Builtin includes use #include_next directives and should be positioned 245 // just prior C include dirs. 246 if (HSOpts.UseBuiltinIncludes) { 247 // Ignore the sys root, we *always* look for clang headers relative to 248 // supplied path. 249 SmallString<128> P = StringRef(HSOpts.ResourceDir); 250 llvm::sys::path::append(P, "include"); 251 AddUnmappedPath(P, ExternCSystem, false); 252 } 253 254 // All remaining additions are for system include directories, early exit if 255 // we aren't using them. 256 if (!HSOpts.UseStandardSystemIncludes) 257 return; 258 259 // Add dirs specified via 'configure --with-c-include-dirs'. 260 StringRef CIncludeDirs(C_INCLUDE_DIRS); 261 if (CIncludeDirs != "") { 262 SmallVector<StringRef, 5> dirs; 263 CIncludeDirs.split(dirs, ":"); 264 for (StringRef dir : dirs) 265 AddPath(dir, ExternCSystem, false); 266 return; 267 } 268 269 switch (os) { 270 case llvm::Triple::Linux: 271 case llvm::Triple::Hurd: 272 case llvm::Triple::Solaris: 273 case llvm::Triple::OpenBSD: 274 llvm_unreachable("Include management is handled in the driver."); 275 276 case llvm::Triple::CloudABI: { 277 // <sysroot>/<triple>/include 278 SmallString<128> P = StringRef(HSOpts.ResourceDir); 279 llvm::sys::path::append(P, "../../..", triple.str(), "include"); 280 AddPath(P, System, false); 281 break; 282 } 283 284 case llvm::Triple::Haiku: 285 AddPath("/boot/system/non-packaged/develop/headers", System, false); 286 AddPath("/boot/system/develop/headers/os", System, false); 287 AddPath("/boot/system/develop/headers/os/app", System, false); 288 AddPath("/boot/system/develop/headers/os/arch", System, false); 289 AddPath("/boot/system/develop/headers/os/device", System, false); 290 AddPath("/boot/system/develop/headers/os/drivers", System, false); 291 AddPath("/boot/system/develop/headers/os/game", System, false); 292 AddPath("/boot/system/develop/headers/os/interface", System, false); 293 AddPath("/boot/system/develop/headers/os/kernel", System, false); 294 AddPath("/boot/system/develop/headers/os/locale", System, false); 295 AddPath("/boot/system/develop/headers/os/mail", System, false); 296 AddPath("/boot/system/develop/headers/os/media", System, false); 297 AddPath("/boot/system/develop/headers/os/midi", System, false); 298 AddPath("/boot/system/develop/headers/os/midi2", System, false); 299 AddPath("/boot/system/develop/headers/os/net", System, false); 300 AddPath("/boot/system/develop/headers/os/opengl", System, false); 301 AddPath("/boot/system/develop/headers/os/storage", System, false); 302 AddPath("/boot/system/develop/headers/os/support", System, false); 303 AddPath("/boot/system/develop/headers/os/translation", System, false); 304 AddPath("/boot/system/develop/headers/os/add-ons/graphics", System, false); 305 AddPath("/boot/system/develop/headers/os/add-ons/input_server", System, false); 306 AddPath("/boot/system/develop/headers/os/add-ons/mail_daemon", System, false); 307 AddPath("/boot/system/develop/headers/os/add-ons/registrar", System, false); 308 AddPath("/boot/system/develop/headers/os/add-ons/screen_saver", System, false); 309 AddPath("/boot/system/develop/headers/os/add-ons/tracker", System, false); 310 AddPath("/boot/system/develop/headers/os/be_apps/Deskbar", System, false); 311 AddPath("/boot/system/develop/headers/os/be_apps/NetPositive", System, false); 312 AddPath("/boot/system/develop/headers/os/be_apps/Tracker", System, false); 313 AddPath("/boot/system/develop/headers/3rdparty", System, false); 314 AddPath("/boot/system/develop/headers/bsd", System, false); 315 AddPath("/boot/system/develop/headers/glibc", System, false); 316 AddPath("/boot/system/develop/headers/posix", System, false); 317 AddPath("/boot/system/develop/headers", System, false); 318 break; 319 case llvm::Triple::RTEMS: 320 break; 321 case llvm::Triple::Win32: 322 switch (triple.getEnvironment()) { 323 default: llvm_unreachable("Include management is handled in the driver."); 324 case llvm::Triple::Cygnus: 325 AddPath("/usr/include/w32api", System, false); 326 break; 327 case llvm::Triple::GNU: 328 break; 329 } 330 break; 331 default: 332 break; 333 } 334 335 switch (os) { 336 case llvm::Triple::CloudABI: 337 case llvm::Triple::RTEMS: 338 case llvm::Triple::NaCl: 339 case llvm::Triple::ELFIAMCU: 340 case llvm::Triple::Fuchsia: 341 break; 342 case llvm::Triple::PS4: { 343 // <isysroot> gets prepended later in AddPath(). 344 std::string BaseSDKPath = ""; 345 if (!HasSysroot) { 346 const char *envValue = getenv("SCE_ORBIS_SDK_DIR"); 347 if (envValue) 348 BaseSDKPath = envValue; 349 else { 350 // HSOpts.ResourceDir variable contains the location of Clang's 351 // resource files. 352 // Assuming that Clang is configured for PS4 without 353 // --with-clang-resource-dir option, the location of Clang's resource 354 // files is <SDK_DIR>/host_tools/lib/clang 355 SmallString<128> P = StringRef(HSOpts.ResourceDir); 356 llvm::sys::path::append(P, "../../.."); 357 BaseSDKPath = std::string(P.str()); 358 } 359 } 360 AddPath(BaseSDKPath + "/target/include", System, false); 361 if (triple.isPS4CPU()) 362 AddPath(BaseSDKPath + "/target/include_common", System, false); 363 LLVM_FALLTHROUGH; 364 } 365 default: 366 AddPath("/usr/include", ExternCSystem, false); 367 break; 368 } 369} 370 371void InitHeaderSearch::AddDefaultCPlusPlusIncludePaths( 372 const LangOptions &LangOpts, const llvm::Triple &triple, 373 const HeaderSearchOptions &HSOpts) { 374 llvm::Triple::OSType os = triple.getOS(); 375 // FIXME: temporary hack: hard-coded paths. 376 377 if (triple.isOSDarwin()) { 378 llvm_unreachable("Include management is handled in the driver."); 379 } 380 381 switch (os) { 382 case llvm::Triple::Linux: 383 case llvm::Triple::Hurd: 384 case llvm::Triple::Solaris: 385 case llvm::Triple::AIX: 386 llvm_unreachable("Include management is handled in the driver."); 387 break; 388 case llvm::Triple::Win32: 389 switch (triple.getEnvironment()) { 390 default: llvm_unreachable("Include management is handled in the driver."); 391 case llvm::Triple::Cygnus: 392 // Cygwin-1.7 393 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3"); 394 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3"); 395 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4"); 396 // g++-4 / Cygwin-1.5 397 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2"); 398 break; 399 } 400 break; 401 case llvm::Triple::DragonFly: 402 AddPath("/usr/include/c++/5.0", CXXSystem, false); 403 break; 404 case llvm::Triple::Minix: 405 AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3", 406 "", "", "", triple); 407 break; 408 default: 409 break; 410 } 411} 412 413void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang, 414 const llvm::Triple &triple, 415 const HeaderSearchOptions &HSOpts) { 416 // NB: This code path is going away. All of the logic is moving into the 417 // driver which has the information necessary to do target-specific 418 // selections of default include paths. Each target which moves there will be 419 // exempted from this logic here until we can delete the entire pile of code. 420 switch (triple.getOS()) { 421 default: 422 break; // Everything else continues to use this routine's logic. 423 424 case llvm::Triple::Emscripten: 425 case llvm::Triple::Linux: 426 case llvm::Triple::Hurd: 427 case llvm::Triple::OpenBSD: 428 case llvm::Triple::Solaris: 429 case llvm::Triple::WASI: 430 case llvm::Triple::AIX: 431 return; 432 433 case llvm::Triple::Win32: 434 if (triple.getEnvironment() != llvm::Triple::Cygnus || 435 triple.isOSBinFormatMachO()) 436 return; 437 break; 438 439 case llvm::Triple::UnknownOS: 440 if (triple.isWasm()) 441 return; 442 break; 443 } 444 445 // All header search logic is handled in the Driver for Darwin. 446 if (triple.isOSDarwin()) { 447 if (HSOpts.UseStandardSystemIncludes) { 448 // Add the default framework include paths on Darwin. 449 AddPath("/System/Library/Frameworks", System, true); 450 AddPath("/Library/Frameworks", System, true); 451 } 452 return; 453 } 454 455 if (Lang.CPlusPlus && !Lang.AsmPreprocessor && 456 HSOpts.UseStandardCXXIncludes && HSOpts.UseStandardSystemIncludes) { 457 if (HSOpts.UseLibcxx) { 458 AddPath("/usr/include/c++/v1", CXXSystem, false); 459 } else { 460 AddDefaultCPlusPlusIncludePaths(Lang, triple, HSOpts); 461 } 462 } 463 464 AddDefaultCIncludePaths(triple, HSOpts); 465} 466 467/// RemoveDuplicates - If there are duplicate directory entries in the specified 468/// search list, remove the later (dead) ones. Returns the number of non-system 469/// headers removed, which is used to update NumAngled. 470static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList, 471 unsigned First, bool Verbose) { 472 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs; 473 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs; 474 llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps; 475 unsigned NonSystemRemoved = 0; 476 for (unsigned i = First; i != SearchList.size(); ++i) { 477 unsigned DirToRemove = i; 478 479 const DirectoryLookup &CurEntry = SearchList[i]; 480 481 if (CurEntry.isNormalDir()) { 482 // If this isn't the first time we've seen this dir, remove it. 483 if (SeenDirs.insert(CurEntry.getDir()).second) 484 continue; 485 } else if (CurEntry.isFramework()) { 486 // If this isn't the first time we've seen this framework dir, remove it. 487 if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second) 488 continue; 489 } else { 490 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 491 // If this isn't the first time we've seen this headermap, remove it. 492 if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second) 493 continue; 494 } 495 496 // If we have a normal #include dir/framework/headermap that is shadowed 497 // later in the chain by a system include location, we actually want to 498 // ignore the user's request and drop the user dir... keeping the system 499 // dir. This is weird, but required to emulate GCC's search path correctly. 500 // 501 // Since dupes of system dirs are rare, just rescan to find the original 502 // that we're nuking instead of using a DenseMap. 503 if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) { 504 // Find the dir that this is the same of. 505 unsigned FirstDir; 506 for (FirstDir = First;; ++FirstDir) { 507 assert(FirstDir != i && "Didn't find dupe?"); 508 509 const DirectoryLookup &SearchEntry = SearchList[FirstDir]; 510 511 // If these are different lookup types, then they can't be the dupe. 512 if (SearchEntry.getLookupType() != CurEntry.getLookupType()) 513 continue; 514 515 bool isSame; 516 if (CurEntry.isNormalDir()) 517 isSame = SearchEntry.getDir() == CurEntry.getDir(); 518 else if (CurEntry.isFramework()) 519 isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir(); 520 else { 521 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 522 isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap(); 523 } 524 525 if (isSame) 526 break; 527 } 528 529 // If the first dir in the search path is a non-system dir, zap it 530 // instead of the system one. 531 if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User) 532 DirToRemove = FirstDir; 533 } 534 535 if (Verbose) { 536 llvm::errs() << "ignoring duplicate directory \"" 537 << CurEntry.getName() << "\"\n"; 538 if (DirToRemove != i) 539 llvm::errs() << " as it is a non-system directory that duplicates " 540 << "a system directory\n"; 541 } 542 if (DirToRemove != i) 543 ++NonSystemRemoved; 544 545 // This is reached if the current entry is a duplicate. Remove the 546 // DirToRemove (usually the current dir). 547 SearchList.erase(SearchList.begin()+DirToRemove); 548 --i; 549 } 550 return NonSystemRemoved; 551} 552 553 554void InitHeaderSearch::Realize(const LangOptions &Lang) { 555 // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList. 556 std::vector<DirectoryLookup> SearchList; 557 SearchList.reserve(IncludePath.size()); 558 559 // Quoted arguments go first. 560 for (auto &Include : IncludePath) 561 if (Include.first == Quoted) 562 SearchList.push_back(Include.second); 563 564 // Deduplicate and remember index. 565 RemoveDuplicates(SearchList, 0, Verbose); 566 unsigned NumQuoted = SearchList.size(); 567 568 for (auto &Include : IncludePath) 569 if (Include.first == Angled || Include.first == IndexHeaderMap) 570 SearchList.push_back(Include.second); 571 572 RemoveDuplicates(SearchList, NumQuoted, Verbose); 573 unsigned NumAngled = SearchList.size(); 574 575 for (auto &Include : IncludePath) 576 if (Include.first == System || Include.first == ExternCSystem || 577 (!Lang.ObjC && !Lang.CPlusPlus && Include.first == CSystem) || 578 (/*FIXME !Lang.ObjC && */ Lang.CPlusPlus && 579 Include.first == CXXSystem) || 580 (Lang.ObjC && !Lang.CPlusPlus && Include.first == ObjCSystem) || 581 (Lang.ObjC && Lang.CPlusPlus && Include.first == ObjCXXSystem)) 582 SearchList.push_back(Include.second); 583 584 for (auto &Include : IncludePath) 585 if (Include.first == After) 586 SearchList.push_back(Include.second); 587 588 // Remove duplicates across both the Angled and System directories. GCC does 589 // this and failing to remove duplicates across these two groups breaks 590 // #include_next. 591 unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose); 592 NumAngled -= NonSystemRemoved; 593 594 bool DontSearchCurDir = false; // TODO: set to true if -I- is set? 595 Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir); 596 597 Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes); 598 599 // If verbose, print the list of directories that will be searched. 600 if (Verbose) { 601 llvm::errs() << "#include \"...\" search starts here:\n"; 602 for (unsigned i = 0, e = SearchList.size(); i != e; ++i) { 603 if (i == NumQuoted) 604 llvm::errs() << "#include <...> search starts here:\n"; 605 StringRef Name = SearchList[i].getName(); 606 const char *Suffix; 607 if (SearchList[i].isNormalDir()) 608 Suffix = ""; 609 else if (SearchList[i].isFramework()) 610 Suffix = " (framework directory)"; 611 else { 612 assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup"); 613 Suffix = " (headermap)"; 614 } 615 llvm::errs() << " " << Name << Suffix << "\n"; 616 } 617 llvm::errs() << "End of search list.\n"; 618 } 619} 620 621void clang::ApplyHeaderSearchOptions(HeaderSearch &HS, 622 const HeaderSearchOptions &HSOpts, 623 const LangOptions &Lang, 624 const llvm::Triple &Triple) { 625 InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot); 626 627 // Add the user defined entries. 628 for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) { 629 const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i]; 630 if (E.IgnoreSysRoot) { 631 Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework); 632 } else { 633 Init.AddPath(E.Path, E.Group, E.IsFramework); 634 } 635 } 636 637 Init.AddDefaultIncludePaths(Lang, Triple, HSOpts); 638 639 for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i) 640 Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix, 641 HSOpts.SystemHeaderPrefixes[i].IsSystemHeader); 642 643 if (HSOpts.UseBuiltinIncludes) { 644 // Set up the builtin include directory in the module map. 645 SmallString<128> P = StringRef(HSOpts.ResourceDir); 646 llvm::sys::path::append(P, "include"); 647 if (auto Dir = HS.getFileMgr().getDirectory(P)) 648 HS.getModuleMap().setBuiltinIncludeDir(*Dir); 649 } 650 651 Init.Realize(Lang); 652} 653