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/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/FileSystem.h" 29 #include "llvm/Support/Path.h" 30 #include "llvm/Support/raw_ostream.h" 31 32 using namespace clang; 33 using namespace clang::frontend; 34 35 namespace { 36 37 /// InitHeaderSearch - This class makes it easier to set the search paths of 38 /// a HeaderSearch object. InitHeaderSearch stores several search path lists 39 /// internally, which can be sent to a HeaderSearch object in one swoop. 40 class InitHeaderSearch { 41 std::vector<std::pair<IncludeDirGroup, DirectoryLookup> > IncludePath; 42 typedef std::vector<std::pair<IncludeDirGroup, 43 DirectoryLookup> >::const_iterator path_iterator; 44 std::vector<std::pair<std::string, bool> > SystemHeaderPrefixes; 45 HeaderSearch &Headers; 46 bool Verbose; 47 std::string IncludeSysroot; 48 bool HasSysroot; 49 50 public: 51 InitHeaderSearch(HeaderSearch & HS,bool verbose,StringRef sysroot)52 InitHeaderSearch(HeaderSearch &HS, bool verbose, StringRef sysroot) 53 : Headers(HS), Verbose(verbose), IncludeSysroot(sysroot), 54 HasSysroot(!(sysroot.empty() || sysroot == "/")) { 55 } 56 57 /// AddPath - Add the specified path to the specified group list, prefixing 58 /// the sysroot if used. 59 void 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 void AddUnmappedPath(const Twine &Path, IncludeDirGroup Group, 64 bool isFramework); 65 66 /// AddSystemHeaderPrefix - Add the specified prefix to the system header 67 /// prefix list. AddSystemHeaderPrefix(StringRef Prefix,bool IsSystemHeader)68 void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) { 69 SystemHeaderPrefixes.emplace_back(Prefix, IsSystemHeader); 70 } 71 72 /// AddGnuCPlusPlusIncludePaths - Add the necessary paths to support a gnu 73 /// libstdc++. 74 void AddGnuCPlusPlusIncludePaths(StringRef Base, 75 StringRef ArchDir, 76 StringRef Dir32, 77 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 llvm::Triple &triple, 93 const HeaderSearchOptions &HSOpts); 94 95 /// AddDefaultSystemIncludePaths - Adds the default system include paths so 96 /// that e.g. stdio.h is found. 97 void AddDefaultIncludePaths(const LangOptions &Lang, 98 const llvm::Triple &triple, 99 const HeaderSearchOptions &HSOpts); 100 101 /// Realize - Merges all search path lists into one list and send it to 102 /// HeaderSearch. 103 void Realize(const LangOptions &Lang); 104 }; 105 106 } // end anonymous namespace. 107 CanPrefixSysroot(StringRef Path)108 static bool CanPrefixSysroot(StringRef Path) { 109 #if defined(LLVM_ON_WIN32) 110 return !Path.empty() && llvm::sys::path::is_separator(Path[0]); 111 #else 112 return llvm::sys::path::is_absolute(Path); 113 #endif 114 } 115 AddPath(const Twine & Path,IncludeDirGroup Group,bool isFramework)116 void InitHeaderSearch::AddPath(const Twine &Path, IncludeDirGroup Group, 117 bool isFramework) { 118 // Add the path with sysroot prepended, if desired and this is a system header 119 // group. 120 if (HasSysroot) { 121 SmallString<256> MappedPathStorage; 122 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage); 123 if (CanPrefixSysroot(MappedPathStr)) { 124 AddUnmappedPath(IncludeSysroot + Path, Group, isFramework); 125 return; 126 } 127 } 128 129 AddUnmappedPath(Path, Group, isFramework); 130 } 131 AddUnmappedPath(const Twine & Path,IncludeDirGroup Group,bool isFramework)132 void 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; 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; 167 } 168 } 169 } 170 171 if (Verbose) 172 llvm::errs() << "ignoring nonexistent directory \"" 173 << MappedPathStr << "\"\n"; 174 } 175 AddGnuCPlusPlusIncludePaths(StringRef Base,StringRef ArchDir,StringRef Dir32,StringRef Dir64,const llvm::Triple & triple)176 void InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base, 177 StringRef ArchDir, 178 StringRef Dir32, 179 StringRef Dir64, 180 const llvm::Triple &triple) { 181 // Add the base dir 182 AddPath(Base, CXXSystem, false); 183 184 // Add the multilib dirs 185 llvm::Triple::ArchType arch = triple.getArch(); 186 bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64; 187 if (is64bit) 188 AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, false); 189 else 190 AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, false); 191 192 // Add the backward dir 193 AddPath(Base + "/backward", CXXSystem, false); 194 } 195 AddMinGWCPlusPlusIncludePaths(StringRef Base,StringRef Arch,StringRef Version)196 void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base, 197 StringRef Arch, 198 StringRef Version) { 199 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++", 200 CXXSystem, false); 201 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch, 202 CXXSystem, false); 203 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward", 204 CXXSystem, false); 205 } 206 AddDefaultCIncludePaths(const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)207 void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple, 208 const HeaderSearchOptions &HSOpts) { 209 llvm::Triple::OSType os = triple.getOS(); 210 211 if (HSOpts.UseStandardSystemIncludes) { 212 switch (os) { 213 case llvm::Triple::CloudABI: 214 case llvm::Triple::FreeBSD: 215 case llvm::Triple::NetBSD: 216 case llvm::Triple::OpenBSD: 217 case llvm::Triple::Bitrig: 218 case llvm::Triple::NaCl: 219 case llvm::Triple::PS4: 220 case llvm::Triple::ELFIAMCU: 221 break; 222 case llvm::Triple::Win32: 223 if (triple.getEnvironment() != llvm::Triple::Cygnus) 224 break; 225 default: 226 // FIXME: temporary hack: hard-coded paths. 227 AddPath("/usr/local/include", System, false); 228 break; 229 } 230 } 231 232 // Builtin includes use #include_next directives and should be positioned 233 // just prior C include dirs. 234 if (HSOpts.UseBuiltinIncludes) { 235 // Ignore the sys root, we *always* look for clang headers relative to 236 // supplied path. 237 SmallString<128> P = StringRef(HSOpts.ResourceDir); 238 llvm::sys::path::append(P, "include"); 239 AddUnmappedPath(P, ExternCSystem, false); 240 } 241 242 // All remaining additions are for system include directories, early exit if 243 // we aren't using them. 244 if (!HSOpts.UseStandardSystemIncludes) 245 return; 246 247 // Add dirs specified via 'configure --with-c-include-dirs'. 248 StringRef CIncludeDirs(C_INCLUDE_DIRS); 249 if (CIncludeDirs != "") { 250 SmallVector<StringRef, 5> dirs; 251 CIncludeDirs.split(dirs, ":"); 252 for (StringRef dir : dirs) 253 AddPath(dir, ExternCSystem, false); 254 return; 255 } 256 257 switch (os) { 258 case llvm::Triple::Linux: 259 llvm_unreachable("Include management is handled in the driver."); 260 261 case llvm::Triple::CloudABI: { 262 // <sysroot>/<triple>/include 263 SmallString<128> P = StringRef(HSOpts.ResourceDir); 264 llvm::sys::path::append(P, "../../..", triple.str(), "include"); 265 AddPath(P, System, false); 266 break; 267 } 268 269 case llvm::Triple::Haiku: 270 AddPath("/boot/system/non-packaged/develop/headers", System, false); 271 AddPath("/boot/system/develop/headers/os", System, false); 272 AddPath("/boot/system/develop/headers/os/app", System, false); 273 AddPath("/boot/system/develop/headers/os/arch", System, false); 274 AddPath("/boot/system/develop/headers/os/device", System, false); 275 AddPath("/boot/system/develop/headers/os/drivers", System, false); 276 AddPath("/boot/system/develop/headers/os/game", System, false); 277 AddPath("/boot/system/develop/headers/os/interface", System, false); 278 AddPath("/boot/system/develop/headers/os/kernel", System, false); 279 AddPath("/boot/system/develop/headers/os/locale", System, false); 280 AddPath("/boot/system/develop/headers/os/mail", System, false); 281 AddPath("/boot/system/develop/headers/os/media", System, false); 282 AddPath("/boot/system/develop/headers/os/midi", System, false); 283 AddPath("/boot/system/develop/headers/os/midi2", System, false); 284 AddPath("/boot/system/develop/headers/os/net", System, false); 285 AddPath("/boot/system/develop/headers/os/opengl", System, false); 286 AddPath("/boot/system/develop/headers/os/storage", System, false); 287 AddPath("/boot/system/develop/headers/os/support", System, false); 288 AddPath("/boot/system/develop/headers/os/translation", System, false); 289 AddPath("/boot/system/develop/headers/os/add-ons/graphics", System, false); 290 AddPath("/boot/system/develop/headers/os/add-ons/input_server", System, false); 291 AddPath("/boot/system/develop/headers/os/add-ons/mail_daemon", System, false); 292 AddPath("/boot/system/develop/headers/os/add-ons/registrar", System, false); 293 AddPath("/boot/system/develop/headers/os/add-ons/screen_saver", System, false); 294 AddPath("/boot/system/develop/headers/os/add-ons/tracker", System, false); 295 AddPath("/boot/system/develop/headers/os/be_apps/Deskbar", System, false); 296 AddPath("/boot/system/develop/headers/os/be_apps/NetPositive", System, false); 297 AddPath("/boot/system/develop/headers/os/be_apps/Tracker", System, false); 298 AddPath("/boot/system/develop/headers/3rdparty", System, false); 299 AddPath("/boot/system/develop/headers/bsd", System, false); 300 AddPath("/boot/system/develop/headers/glibc", System, false); 301 AddPath("/boot/system/develop/headers/posix", System, false); 302 AddPath("/boot/system/develop/headers", System, false); 303 break; 304 case llvm::Triple::RTEMS: 305 break; 306 case llvm::Triple::Win32: 307 switch (triple.getEnvironment()) { 308 default: llvm_unreachable("Include management is handled in the driver."); 309 case llvm::Triple::Cygnus: 310 AddPath("/usr/include/w32api", System, false); 311 break; 312 case llvm::Triple::GNU: 313 break; 314 } 315 break; 316 default: 317 break; 318 } 319 320 switch (os) { 321 case llvm::Triple::CloudABI: 322 case llvm::Triple::RTEMS: 323 case llvm::Triple::NaCl: 324 case llvm::Triple::ELFIAMCU: 325 break; 326 case llvm::Triple::PS4: { 327 // <isysroot> gets prepended later in AddPath(). 328 std::string BaseSDKPath = ""; 329 if (!HasSysroot) { 330 const char *envValue = getenv("SCE_ORBIS_SDK_DIR"); 331 if (envValue) 332 BaseSDKPath = envValue; 333 else { 334 // HSOpts.ResourceDir variable contains the location of Clang's 335 // resource files. 336 // Assuming that Clang is configured for PS4 without 337 // --with-clang-resource-dir option, the location of Clang's resource 338 // files is <SDK_DIR>/host_tools/lib/clang 339 SmallString<128> P = StringRef(HSOpts.ResourceDir); 340 llvm::sys::path::append(P, "../../.."); 341 BaseSDKPath = P.str(); 342 } 343 } 344 AddPath(BaseSDKPath + "/target/include", System, false); 345 if (triple.isPS4CPU()) 346 AddPath(BaseSDKPath + "/target/include_common", System, false); 347 } 348 default: 349 AddPath("/usr/include", ExternCSystem, false); 350 break; 351 } 352 } 353 354 void InitHeaderSearch:: AddDefaultCPlusPlusIncludePaths(const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)355 AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) { 356 llvm::Triple::OSType os = triple.getOS(); 357 // FIXME: temporary hack: hard-coded paths. 358 359 if (triple.isOSDarwin()) { 360 switch (triple.getArch()) { 361 default: break; 362 363 case llvm::Triple::ppc: 364 case llvm::Triple::ppc64: 365 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 366 "powerpc-apple-darwin10", "", "ppc64", 367 triple); 368 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0", 369 "powerpc-apple-darwin10", "", "ppc64", 370 triple); 371 break; 372 373 case llvm::Triple::x86: 374 case llvm::Triple::x86_64: 375 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 376 "i686-apple-darwin10", "", "x86_64", triple); 377 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0", 378 "i686-apple-darwin8", "", "", triple); 379 break; 380 381 case llvm::Triple::arm: 382 case llvm::Triple::thumb: 383 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 384 "arm-apple-darwin10", "v7", "", triple); 385 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 386 "arm-apple-darwin10", "v6", "", triple); 387 break; 388 389 case llvm::Triple::aarch64: 390 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 391 "arm64-apple-darwin10", "", "", triple); 392 break; 393 } 394 return; 395 } 396 397 switch (os) { 398 case llvm::Triple::Linux: 399 llvm_unreachable("Include management is handled in the driver."); 400 break; 401 case llvm::Triple::Win32: 402 switch (triple.getEnvironment()) { 403 default: llvm_unreachable("Include management is handled in the driver."); 404 case llvm::Triple::Cygnus: 405 // Cygwin-1.7 406 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3"); 407 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3"); 408 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4"); 409 // g++-4 / Cygwin-1.5 410 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2"); 411 break; 412 } 413 break; 414 case llvm::Triple::DragonFly: 415 AddPath("/usr/include/c++/5.0", CXXSystem, false); 416 break; 417 case llvm::Triple::OpenBSD: { 418 std::string t = triple.getTriple(); 419 if (t.substr(0, 6) == "x86_64") 420 t.replace(0, 6, "amd64"); 421 AddGnuCPlusPlusIncludePaths("/usr/include/g++", 422 t, "", "", triple); 423 break; 424 } 425 case llvm::Triple::Minix: 426 AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3", 427 "", "", "", triple); 428 break; 429 default: 430 break; 431 } 432 } 433 AddDefaultIncludePaths(const LangOptions & Lang,const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)434 void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang, 435 const llvm::Triple &triple, 436 const HeaderSearchOptions &HSOpts) { 437 // NB: This code path is going away. All of the logic is moving into the 438 // driver which has the information necessary to do target-specific 439 // selections of default include paths. Each target which moves there will be 440 // exempted from this logic here until we can delete the entire pile of code. 441 switch (triple.getOS()) { 442 default: 443 break; // Everything else continues to use this routine's logic. 444 445 case llvm::Triple::Linux: 446 return; 447 448 case llvm::Triple::Win32: 449 if (triple.getEnvironment() != llvm::Triple::Cygnus || 450 triple.isOSBinFormatMachO()) 451 return; 452 break; 453 } 454 455 if (Lang.CPlusPlus && HSOpts.UseStandardCXXIncludes && 456 HSOpts.UseStandardSystemIncludes) { 457 if (HSOpts.UseLibcxx) { 458 if (triple.isOSDarwin()) { 459 // On Darwin, libc++ may be installed alongside the compiler in 460 // include/c++/v1. 461 if (!HSOpts.ResourceDir.empty()) { 462 // Remove version from foo/lib/clang/version 463 StringRef NoVer = llvm::sys::path::parent_path(HSOpts.ResourceDir); 464 // Remove clang from foo/lib/clang 465 StringRef Lib = llvm::sys::path::parent_path(NoVer); 466 // Remove lib from foo/lib 467 SmallString<128> P = llvm::sys::path::parent_path(Lib); 468 469 // Get foo/include/c++/v1 470 llvm::sys::path::append(P, "include", "c++", "v1"); 471 AddUnmappedPath(P, CXXSystem, false); 472 } 473 } 474 AddPath("/usr/include/c++/v1", CXXSystem, false); 475 } else { 476 AddDefaultCPlusPlusIncludePaths(triple, HSOpts); 477 } 478 } 479 480 AddDefaultCIncludePaths(triple, HSOpts); 481 482 // Add the default framework include paths on Darwin. 483 if (HSOpts.UseStandardSystemIncludes) { 484 if (triple.isOSDarwin()) { 485 AddPath("/System/Library/Frameworks", System, true); 486 AddPath("/Library/Frameworks", System, true); 487 } 488 } 489 } 490 491 /// RemoveDuplicates - If there are duplicate directory entries in the specified 492 /// search list, remove the later (dead) ones. Returns the number of non-system 493 /// headers removed, which is used to update NumAngled. RemoveDuplicates(std::vector<DirectoryLookup> & SearchList,unsigned First,bool Verbose)494 static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList, 495 unsigned First, bool Verbose) { 496 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs; 497 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs; 498 llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps; 499 unsigned NonSystemRemoved = 0; 500 for (unsigned i = First; i != SearchList.size(); ++i) { 501 unsigned DirToRemove = i; 502 503 const DirectoryLookup &CurEntry = SearchList[i]; 504 505 if (CurEntry.isNormalDir()) { 506 // If this isn't the first time we've seen this dir, remove it. 507 if (SeenDirs.insert(CurEntry.getDir()).second) 508 continue; 509 } else if (CurEntry.isFramework()) { 510 // If this isn't the first time we've seen this framework dir, remove it. 511 if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second) 512 continue; 513 } else { 514 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 515 // If this isn't the first time we've seen this headermap, remove it. 516 if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second) 517 continue; 518 } 519 520 // If we have a normal #include dir/framework/headermap that is shadowed 521 // later in the chain by a system include location, we actually want to 522 // ignore the user's request and drop the user dir... keeping the system 523 // dir. This is weird, but required to emulate GCC's search path correctly. 524 // 525 // Since dupes of system dirs are rare, just rescan to find the original 526 // that we're nuking instead of using a DenseMap. 527 if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) { 528 // Find the dir that this is the same of. 529 unsigned FirstDir; 530 for (FirstDir = 0; ; ++FirstDir) { 531 assert(FirstDir != i && "Didn't find dupe?"); 532 533 const DirectoryLookup &SearchEntry = SearchList[FirstDir]; 534 535 // If these are different lookup types, then they can't be the dupe. 536 if (SearchEntry.getLookupType() != CurEntry.getLookupType()) 537 continue; 538 539 bool isSame; 540 if (CurEntry.isNormalDir()) 541 isSame = SearchEntry.getDir() == CurEntry.getDir(); 542 else if (CurEntry.isFramework()) 543 isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir(); 544 else { 545 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 546 isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap(); 547 } 548 549 if (isSame) 550 break; 551 } 552 553 // If the first dir in the search path is a non-system dir, zap it 554 // instead of the system one. 555 if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User) 556 DirToRemove = FirstDir; 557 } 558 559 if (Verbose) { 560 llvm::errs() << "ignoring duplicate directory \"" 561 << CurEntry.getName() << "\"\n"; 562 if (DirToRemove != i) 563 llvm::errs() << " as it is a non-system directory that duplicates " 564 << "a system directory\n"; 565 } 566 if (DirToRemove != i) 567 ++NonSystemRemoved; 568 569 // This is reached if the current entry is a duplicate. Remove the 570 // DirToRemove (usually the current dir). 571 SearchList.erase(SearchList.begin()+DirToRemove); 572 --i; 573 } 574 return NonSystemRemoved; 575 } 576 577 Realize(const LangOptions & Lang)578 void InitHeaderSearch::Realize(const LangOptions &Lang) { 579 // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList. 580 std::vector<DirectoryLookup> SearchList; 581 SearchList.reserve(IncludePath.size()); 582 583 // Quoted arguments go first. 584 for (auto &Include : IncludePath) 585 if (Include.first == Quoted) 586 SearchList.push_back(Include.second); 587 588 // Deduplicate and remember index. 589 RemoveDuplicates(SearchList, 0, Verbose); 590 unsigned NumQuoted = SearchList.size(); 591 592 for (auto &Include : IncludePath) 593 if (Include.first == Angled || Include.first == IndexHeaderMap) 594 SearchList.push_back(Include.second); 595 596 RemoveDuplicates(SearchList, NumQuoted, Verbose); 597 unsigned NumAngled = SearchList.size(); 598 599 for (auto &Include : IncludePath) 600 if (Include.first == System || Include.first == ExternCSystem || 601 (!Lang.ObjC1 && !Lang.CPlusPlus && Include.first == CSystem) || 602 (/*FIXME !Lang.ObjC1 && */ Lang.CPlusPlus && 603 Include.first == CXXSystem) || 604 (Lang.ObjC1 && !Lang.CPlusPlus && Include.first == ObjCSystem) || 605 (Lang.ObjC1 && Lang.CPlusPlus && Include.first == ObjCXXSystem)) 606 SearchList.push_back(Include.second); 607 608 for (auto &Include : IncludePath) 609 if (Include.first == After) 610 SearchList.push_back(Include.second); 611 612 // Remove duplicates across both the Angled and System directories. GCC does 613 // this and failing to remove duplicates across these two groups breaks 614 // #include_next. 615 unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose); 616 NumAngled -= NonSystemRemoved; 617 618 bool DontSearchCurDir = false; // TODO: set to true if -I- is set? 619 Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir); 620 621 Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes); 622 623 // If verbose, print the list of directories that will be searched. 624 if (Verbose) { 625 llvm::errs() << "#include \"...\" search starts here:\n"; 626 for (unsigned i = 0, e = SearchList.size(); i != e; ++i) { 627 if (i == NumQuoted) 628 llvm::errs() << "#include <...> search starts here:\n"; 629 const char *Name = SearchList[i].getName(); 630 const char *Suffix; 631 if (SearchList[i].isNormalDir()) 632 Suffix = ""; 633 else if (SearchList[i].isFramework()) 634 Suffix = " (framework directory)"; 635 else { 636 assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup"); 637 Suffix = " (headermap)"; 638 } 639 llvm::errs() << " " << Name << Suffix << "\n"; 640 } 641 llvm::errs() << "End of search list.\n"; 642 } 643 } 644 ApplyHeaderSearchOptions(HeaderSearch & HS,const HeaderSearchOptions & HSOpts,const LangOptions & Lang,const llvm::Triple & Triple)645 void clang::ApplyHeaderSearchOptions(HeaderSearch &HS, 646 const HeaderSearchOptions &HSOpts, 647 const LangOptions &Lang, 648 const llvm::Triple &Triple) { 649 InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot); 650 651 // Add the user defined entries. 652 for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) { 653 const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i]; 654 if (E.IgnoreSysRoot) { 655 Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework); 656 } else { 657 Init.AddPath(E.Path, E.Group, E.IsFramework); 658 } 659 } 660 661 Init.AddDefaultIncludePaths(Lang, Triple, HSOpts); 662 663 for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i) 664 Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix, 665 HSOpts.SystemHeaderPrefixes[i].IsSystemHeader); 666 667 if (HSOpts.UseBuiltinIncludes) { 668 // Set up the builtin include directory in the module map. 669 SmallString<128> P = StringRef(HSOpts.ResourceDir); 670 llvm::sys::path::append(P, "include"); 671 if (const DirectoryEntry *Dir = HS.getFileMgr().getDirectory(P)) 672 HS.getModuleMap().setBuiltinIncludeDir(Dir); 673 } 674 675 Init.Realize(Lang); 676 } 677