1 //===--- InitHeaderSearch.cpp - Initialize header search paths ------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements the InitHeaderSearch class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "clang/Frontend/Utils.h" 15 #include "clang/Basic/FileManager.h" 16 #include "clang/Basic/LangOptions.h" 17 #include "clang/Config/config.h" // C_INCLUDE_DIRS 18 #include "clang/Lex/HeaderSearch.h" 19 #include "clang/Lex/HeaderSearchOptions.h" 20 #include "llvm/ADT/SmallPtrSet.h" 21 #include "llvm/ADT/SmallString.h" 22 #include "llvm/ADT/SmallVector.h" 23 #include "llvm/ADT/StringExtras.h" 24 #include "llvm/ADT/Triple.h" 25 #include "llvm/ADT/Twine.h" 26 #include "llvm/Support/ErrorHandling.h" 27 #include "llvm/Support/FileSystem.h" 28 #include "llvm/Support/Path.h" 29 #include "llvm/Support/raw_ostream.h" 30 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 51 InitHeaderSearch(HeaderSearch &HS, bool verbose, StringRef sysroot) 52 : Headers(HS), Verbose(verbose), IncludeSysroot(sysroot), 53 HasSysroot(!(sysroot.empty() || sysroot == "/")) { 54 } 55 56 /// AddPath - Add the specified path to the specified group list, prefixing 57 /// the sysroot if used. 58 void AddPath(const Twine &Path, IncludeDirGroup Group, bool isFramework); 59 60 /// AddUnmappedPath - Add the specified path to the specified group list, 61 /// without performing any sysroot remapping. 62 void AddUnmappedPath(const Twine &Path, IncludeDirGroup Group, 63 bool isFramework); 64 65 /// AddSystemHeaderPrefix - Add the specified prefix to the system header 66 /// prefix list. 67 void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) { 68 SystemHeaderPrefixes.push_back(std::make_pair(Prefix, IsSystemHeader)); 69 } 70 71 /// AddGnuCPlusPlusIncludePaths - Add the necessary paths to support a gnu 72 /// libstdc++. 73 void AddGnuCPlusPlusIncludePaths(StringRef Base, 74 StringRef ArchDir, 75 StringRef Dir32, 76 StringRef Dir64, 77 const llvm::Triple &triple); 78 79 /// AddMinGWCPlusPlusIncludePaths - Add the necessary paths to support a MinGW 80 /// libstdc++. 81 void AddMinGWCPlusPlusIncludePaths(StringRef Base, 82 StringRef Arch, 83 StringRef Version); 84 85 /// AddMinGW64CXXPaths - Add the necessary paths to support 86 /// libstdc++ of x86_64-w64-mingw32 aka mingw-w64. 87 void AddMinGW64CXXPaths(StringRef Base, 88 StringRef Version); 89 90 // AddDefaultCIncludePaths - Add paths that should always be searched. 91 void AddDefaultCIncludePaths(const llvm::Triple &triple, 92 const HeaderSearchOptions &HSOpts); 93 94 // AddDefaultCPlusPlusIncludePaths - Add paths that should be searched when 95 // compiling c++. 96 void AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, 97 const HeaderSearchOptions &HSOpts); 98 99 /// AddDefaultSystemIncludePaths - Adds the default system include paths so 100 /// that e.g. stdio.h is found. 101 void AddDefaultIncludePaths(const LangOptions &Lang, 102 const llvm::Triple &triple, 103 const HeaderSearchOptions &HSOpts); 104 105 /// Realize - Merges all search path lists into one list and send it to 106 /// HeaderSearch. 107 void Realize(const LangOptions &Lang); 108 }; 109 110 } // end anonymous namespace. 111 112 static bool CanPrefixSysroot(StringRef Path) { 113 #if defined(LLVM_ON_WIN32) 114 return !Path.empty() && llvm::sys::path::is_separator(Path[0]); 115 #else 116 return llvm::sys::path::is_absolute(Path); 117 #endif 118 } 119 120 void InitHeaderSearch::AddPath(const Twine &Path, IncludeDirGroup Group, 121 bool isFramework) { 122 // Add the path with sysroot prepended, if desired and this is a system header 123 // group. 124 if (HasSysroot) { 125 SmallString<256> MappedPathStorage; 126 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage); 127 if (CanPrefixSysroot(MappedPathStr)) { 128 AddUnmappedPath(IncludeSysroot + Path, Group, isFramework); 129 return; 130 } 131 } 132 133 AddUnmappedPath(Path, Group, isFramework); 134 } 135 136 void InitHeaderSearch::AddUnmappedPath(const Twine &Path, IncludeDirGroup Group, 137 bool isFramework) { 138 assert(!Path.isTriviallyEmpty() && "can't handle empty path here"); 139 140 FileManager &FM = Headers.getFileMgr(); 141 SmallString<256> MappedPathStorage; 142 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage); 143 144 // Compute the DirectoryLookup type. 145 SrcMgr::CharacteristicKind Type; 146 if (Group == Quoted || Group == Angled || Group == IndexHeaderMap) { 147 Type = SrcMgr::C_User; 148 } else if (Group == ExternCSystem) { 149 Type = SrcMgr::C_ExternCSystem; 150 } else { 151 Type = SrcMgr::C_System; 152 } 153 154 // If the directory exists, add it. 155 if (const DirectoryEntry *DE = FM.getDirectory(MappedPathStr)) { 156 IncludePath.push_back( 157 std::make_pair(Group, DirectoryLookup(DE, Type, isFramework))); 158 return; 159 } 160 161 // Check to see if this is an apple-style headermap (which are not allowed to 162 // be frameworks). 163 if (!isFramework) { 164 if (const FileEntry *FE = FM.getFile(MappedPathStr)) { 165 if (const HeaderMap *HM = Headers.CreateHeaderMap(FE)) { 166 // It is a headermap, add it to the search path. 167 IncludePath.push_back( 168 std::make_pair(Group, 169 DirectoryLookup(HM, Type, Group == IndexHeaderMap))); 170 return; 171 } 172 } 173 } 174 175 if (Verbose) 176 llvm::errs() << "ignoring nonexistent directory \"" 177 << MappedPathStr << "\"\n"; 178 } 179 180 void InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base, 181 StringRef ArchDir, 182 StringRef Dir32, 183 StringRef Dir64, 184 const llvm::Triple &triple) { 185 // Add the base dir 186 AddPath(Base, CXXSystem, false); 187 188 // Add the multilib dirs 189 llvm::Triple::ArchType arch = triple.getArch(); 190 bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64; 191 if (is64bit) 192 AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, false); 193 else 194 AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, false); 195 196 // Add the backward dir 197 AddPath(Base + "/backward", CXXSystem, false); 198 } 199 200 void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base, 201 StringRef Arch, 202 StringRef Version) { 203 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++", 204 CXXSystem, false); 205 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch, 206 CXXSystem, false); 207 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward", 208 CXXSystem, false); 209 } 210 211 void InitHeaderSearch::AddMinGW64CXXPaths(StringRef Base, 212 StringRef Version) { 213 // Assumes Base is HeaderSearchOpts' ResourceDir 214 AddPath(Base + "/../../../include/c++/" + Version, 215 CXXSystem, false); 216 AddPath(Base + "/../../../include/c++/" + Version + "/x86_64-w64-mingw32", 217 CXXSystem, false); 218 AddPath(Base + "/../../../include/c++/" + Version + "/i686-w64-mingw32", 219 CXXSystem, false); 220 AddPath(Base + "/../../../include/c++/" + Version + "/backward", 221 CXXSystem, false); 222 } 223 224 void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple, 225 const HeaderSearchOptions &HSOpts) { 226 llvm::Triple::OSType os = triple.getOS(); 227 228 if (HSOpts.UseStandardSystemIncludes) { 229 switch (os) { 230 case llvm::Triple::CloudABI: 231 case llvm::Triple::FreeBSD: 232 case llvm::Triple::NetBSD: 233 case llvm::Triple::OpenBSD: 234 case llvm::Triple::Bitrig: 235 case llvm::Triple::NaCl: 236 break; 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 (SmallVectorImpl<StringRef>::iterator i = dirs.begin(); 265 i != dirs.end(); 266 ++i) 267 AddPath(*i, ExternCSystem, false); 268 return; 269 } 270 271 switch (os) { 272 case llvm::Triple::Linux: 273 llvm_unreachable("Include management is handled in the driver."); 274 275 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/common/include", System, false); 285 AddPath("/boot/develop/headers/os", System, false); 286 AddPath("/boot/develop/headers/os/app", System, false); 287 AddPath("/boot/develop/headers/os/arch", System, false); 288 AddPath("/boot/develop/headers/os/device", System, false); 289 AddPath("/boot/develop/headers/os/drivers", System, false); 290 AddPath("/boot/develop/headers/os/game", System, false); 291 AddPath("/boot/develop/headers/os/interface", System, false); 292 AddPath("/boot/develop/headers/os/kernel", System, false); 293 AddPath("/boot/develop/headers/os/locale", System, false); 294 AddPath("/boot/develop/headers/os/mail", System, false); 295 AddPath("/boot/develop/headers/os/media", System, false); 296 AddPath("/boot/develop/headers/os/midi", System, false); 297 AddPath("/boot/develop/headers/os/midi2", System, false); 298 AddPath("/boot/develop/headers/os/net", System, false); 299 AddPath("/boot/develop/headers/os/storage", System, false); 300 AddPath("/boot/develop/headers/os/support", System, false); 301 AddPath("/boot/develop/headers/os/translation", System, false); 302 AddPath("/boot/develop/headers/os/add-ons/graphics", System, false); 303 AddPath("/boot/develop/headers/os/add-ons/input_server", System, false); 304 AddPath("/boot/develop/headers/os/add-ons/screen_saver", System, false); 305 AddPath("/boot/develop/headers/os/add-ons/tracker", System, false); 306 AddPath("/boot/develop/headers/os/be_apps/Deskbar", System, false); 307 AddPath("/boot/develop/headers/os/be_apps/NetPositive", System, false); 308 AddPath("/boot/develop/headers/os/be_apps/Tracker", System, false); 309 AddPath("/boot/develop/headers/cpp", System, false); 310 AddPath("/boot/develop/headers/cpp/i586-pc-haiku", System, false); 311 AddPath("/boot/develop/headers/3rdparty", System, false); 312 AddPath("/boot/develop/headers/bsd", System, false); 313 AddPath("/boot/develop/headers/glibc", System, false); 314 AddPath("/boot/develop/headers/posix", System, false); 315 AddPath("/boot/develop/headers", System, false); 316 break; 317 case llvm::Triple::RTEMS: 318 break; 319 case llvm::Triple::Win32: 320 switch (triple.getEnvironment()) { 321 default: llvm_unreachable("Include management is handled in the driver."); 322 case llvm::Triple::Cygnus: 323 AddPath("/usr/include/w32api", System, false); 324 break; 325 case llvm::Triple::GNU: 326 // mingw-w64 crt include paths 327 // <sysroot>/i686-w64-mingw32/include 328 SmallString<128> P = StringRef(HSOpts.ResourceDir); 329 llvm::sys::path::append(P, "../../../i686-w64-mingw32/include"); 330 AddPath(P, System, false); 331 332 // <sysroot>/x86_64-w64-mingw32/include 333 P.resize(HSOpts.ResourceDir.size()); 334 llvm::sys::path::append(P, "../../../x86_64-w64-mingw32/include"); 335 AddPath(P, System, false); 336 337 // mingw.org crt include paths 338 // <sysroot>/include 339 P.resize(HSOpts.ResourceDir.size()); 340 llvm::sys::path::append(P, "../../../include"); 341 AddPath(P, System, false); 342 AddPath("/mingw/include", System, false); 343 #if defined(LLVM_ON_WIN32) 344 AddPath("c:/mingw/include", System, false); 345 #endif 346 break; 347 } 348 break; 349 default: 350 break; 351 } 352 353 switch (os) { 354 case llvm::Triple::CloudABI: 355 case llvm::Triple::RTEMS: 356 case llvm::Triple::NaCl: 357 break; 358 default: 359 AddPath("/usr/include", ExternCSystem, false); 360 break; 361 } 362 } 363 364 void InitHeaderSearch:: 365 AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) { 366 llvm::Triple::OSType os = triple.getOS(); 367 // FIXME: temporary hack: hard-coded paths. 368 369 if (triple.isOSDarwin()) { 370 switch (triple.getArch()) { 371 default: break; 372 373 case llvm::Triple::ppc: 374 case llvm::Triple::ppc64: 375 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 376 "powerpc-apple-darwin10", "", "ppc64", 377 triple); 378 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0", 379 "powerpc-apple-darwin10", "", "ppc64", 380 triple); 381 break; 382 383 case llvm::Triple::x86: 384 case llvm::Triple::x86_64: 385 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 386 "i686-apple-darwin10", "", "x86_64", triple); 387 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0", 388 "i686-apple-darwin8", "", "", triple); 389 break; 390 391 case llvm::Triple::arm: 392 case llvm::Triple::thumb: 393 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 394 "arm-apple-darwin10", "v7", "", triple); 395 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 396 "arm-apple-darwin10", "v6", "", triple); 397 break; 398 399 case llvm::Triple::aarch64: 400 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 401 "arm64-apple-darwin10", "", "", triple); 402 break; 403 } 404 return; 405 } 406 407 switch (os) { 408 case llvm::Triple::Linux: 409 llvm_unreachable("Include management is handled in the driver."); 410 break; 411 case llvm::Triple::Win32: 412 switch (triple.getEnvironment()) { 413 default: llvm_unreachable("Include management is handled in the driver."); 414 case llvm::Triple::Cygnus: 415 // Cygwin-1.7 416 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3"); 417 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3"); 418 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4"); 419 // g++-4 / Cygwin-1.5 420 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2"); 421 break; 422 case llvm::Triple::GNU: 423 // mingw-w64 C++ include paths (i686-w64-mingw32 and x86_64-w64-mingw32) 424 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.0"); 425 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.1"); 426 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.2"); 427 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.3"); 428 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.8.0"); 429 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.8.1"); 430 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.8.2"); 431 // mingw.org C++ include paths 432 #if defined(LLVM_ON_WIN32) 433 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.0"); 434 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.1"); 435 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.2"); 436 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.3"); 437 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.0"); 438 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.1"); 439 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.2"); 440 #endif 441 break; 442 } 443 case llvm::Triple::DragonFly: 444 if (llvm::sys::fs::exists("/usr/lib/gcc47")) 445 AddPath("/usr/include/c++/4.7", CXXSystem, false); 446 else 447 AddPath("/usr/include/c++/4.4", CXXSystem, false); 448 break; 449 case llvm::Triple::OpenBSD: { 450 std::string t = triple.getTriple(); 451 if (t.substr(0, 6) == "x86_64") 452 t.replace(0, 6, "amd64"); 453 AddGnuCPlusPlusIncludePaths("/usr/include/g++", 454 t, "", "", triple); 455 break; 456 } 457 case llvm::Triple::Minix: 458 AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3", 459 "", "", "", triple); 460 break; 461 case llvm::Triple::Solaris: 462 AddGnuCPlusPlusIncludePaths("/usr/gcc/4.5/include/c++/4.5.2/", 463 "i386-pc-solaris2.11", "", "", triple); 464 break; 465 default: 466 break; 467 } 468 } 469 470 void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang, 471 const llvm::Triple &triple, 472 const HeaderSearchOptions &HSOpts) { 473 // NB: This code path is going away. All of the logic is moving into the 474 // driver which has the information necessary to do target-specific 475 // selections of default include paths. Each target which moves there will be 476 // exempted from this logic here until we can delete the entire pile of code. 477 switch (triple.getOS()) { 478 default: 479 break; // Everything else continues to use this routine's logic. 480 481 case llvm::Triple::Linux: 482 return; 483 484 case llvm::Triple::Win32: 485 if (triple.getEnvironment() == llvm::Triple::MSVC || 486 triple.getEnvironment() == llvm::Triple::Itanium || 487 triple.isOSBinFormatMachO()) 488 return; 489 break; 490 } 491 492 if (Lang.CPlusPlus && HSOpts.UseStandardCXXIncludes && 493 HSOpts.UseStandardSystemIncludes) { 494 if (HSOpts.UseLibcxx) { 495 if (triple.isOSDarwin()) { 496 // On Darwin, libc++ may be installed alongside the compiler in 497 // include/c++/v1. 498 if (!HSOpts.ResourceDir.empty()) { 499 // Remove version from foo/lib/clang/version 500 StringRef NoVer = llvm::sys::path::parent_path(HSOpts.ResourceDir); 501 // Remove clang from foo/lib/clang 502 StringRef Lib = llvm::sys::path::parent_path(NoVer); 503 // Remove lib from foo/lib 504 SmallString<128> P = llvm::sys::path::parent_path(Lib); 505 506 // Get foo/include/c++/v1 507 llvm::sys::path::append(P, "include", "c++", "v1"); 508 AddUnmappedPath(P, CXXSystem, false); 509 } 510 } 511 // On Solaris, include the support directory for things like xlocale and 512 // fudged system headers. 513 if (triple.getOS() == llvm::Triple::Solaris) 514 AddPath("/usr/include/c++/v1/support/solaris", CXXSystem, false); 515 516 AddPath("/usr/include/c++/v1", CXXSystem, false); 517 } else { 518 AddDefaultCPlusPlusIncludePaths(triple, HSOpts); 519 } 520 } 521 522 AddDefaultCIncludePaths(triple, HSOpts); 523 524 // Add the default framework include paths on Darwin. 525 if (HSOpts.UseStandardSystemIncludes) { 526 if (triple.isOSDarwin()) { 527 AddPath("/System/Library/Frameworks", System, true); 528 AddPath("/Library/Frameworks", System, true); 529 } 530 } 531 } 532 533 /// RemoveDuplicates - If there are duplicate directory entries in the specified 534 /// search list, remove the later (dead) ones. Returns the number of non-system 535 /// headers removed, which is used to update NumAngled. 536 static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList, 537 unsigned First, bool Verbose) { 538 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs; 539 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs; 540 llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps; 541 unsigned NonSystemRemoved = 0; 542 for (unsigned i = First; i != SearchList.size(); ++i) { 543 unsigned DirToRemove = i; 544 545 const DirectoryLookup &CurEntry = SearchList[i]; 546 547 if (CurEntry.isNormalDir()) { 548 // If this isn't the first time we've seen this dir, remove it. 549 if (SeenDirs.insert(CurEntry.getDir()).second) 550 continue; 551 } else if (CurEntry.isFramework()) { 552 // If this isn't the first time we've seen this framework dir, remove it. 553 if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second) 554 continue; 555 } else { 556 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 557 // If this isn't the first time we've seen this headermap, remove it. 558 if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second) 559 continue; 560 } 561 562 // If we have a normal #include dir/framework/headermap that is shadowed 563 // later in the chain by a system include location, we actually want to 564 // ignore the user's request and drop the user dir... keeping the system 565 // dir. This is weird, but required to emulate GCC's search path correctly. 566 // 567 // Since dupes of system dirs are rare, just rescan to find the original 568 // that we're nuking instead of using a DenseMap. 569 if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) { 570 // Find the dir that this is the same of. 571 unsigned FirstDir; 572 for (FirstDir = 0; ; ++FirstDir) { 573 assert(FirstDir != i && "Didn't find dupe?"); 574 575 const DirectoryLookup &SearchEntry = SearchList[FirstDir]; 576 577 // If these are different lookup types, then they can't be the dupe. 578 if (SearchEntry.getLookupType() != CurEntry.getLookupType()) 579 continue; 580 581 bool isSame; 582 if (CurEntry.isNormalDir()) 583 isSame = SearchEntry.getDir() == CurEntry.getDir(); 584 else if (CurEntry.isFramework()) 585 isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir(); 586 else { 587 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 588 isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap(); 589 } 590 591 if (isSame) 592 break; 593 } 594 595 // If the first dir in the search path is a non-system dir, zap it 596 // instead of the system one. 597 if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User) 598 DirToRemove = FirstDir; 599 } 600 601 if (Verbose) { 602 llvm::errs() << "ignoring duplicate directory \"" 603 << CurEntry.getName() << "\"\n"; 604 if (DirToRemove != i) 605 llvm::errs() << " as it is a non-system directory that duplicates " 606 << "a system directory\n"; 607 } 608 if (DirToRemove != i) 609 ++NonSystemRemoved; 610 611 // This is reached if the current entry is a duplicate. Remove the 612 // DirToRemove (usually the current dir). 613 SearchList.erase(SearchList.begin()+DirToRemove); 614 --i; 615 } 616 return NonSystemRemoved; 617 } 618 619 620 void InitHeaderSearch::Realize(const LangOptions &Lang) { 621 // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList. 622 std::vector<DirectoryLookup> SearchList; 623 SearchList.reserve(IncludePath.size()); 624 625 // Quoted arguments go first. 626 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 627 it != ie; ++it) { 628 if (it->first == Quoted) 629 SearchList.push_back(it->second); 630 } 631 // Deduplicate and remember index. 632 RemoveDuplicates(SearchList, 0, Verbose); 633 unsigned NumQuoted = SearchList.size(); 634 635 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 636 it != ie; ++it) { 637 if (it->first == Angled || it->first == IndexHeaderMap) 638 SearchList.push_back(it->second); 639 } 640 641 RemoveDuplicates(SearchList, NumQuoted, Verbose); 642 unsigned NumAngled = SearchList.size(); 643 644 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 645 it != ie; ++it) { 646 if (it->first == System || it->first == ExternCSystem || 647 (!Lang.ObjC1 && !Lang.CPlusPlus && it->first == CSystem) || 648 (/*FIXME !Lang.ObjC1 && */Lang.CPlusPlus && it->first == CXXSystem) || 649 (Lang.ObjC1 && !Lang.CPlusPlus && it->first == ObjCSystem) || 650 (Lang.ObjC1 && Lang.CPlusPlus && it->first == ObjCXXSystem)) 651 SearchList.push_back(it->second); 652 } 653 654 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 655 it != ie; ++it) { 656 if (it->first == After) 657 SearchList.push_back(it->second); 658 } 659 660 // Remove duplicates across both the Angled and System directories. GCC does 661 // this and failing to remove duplicates across these two groups breaks 662 // #include_next. 663 unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose); 664 NumAngled -= NonSystemRemoved; 665 666 bool DontSearchCurDir = false; // TODO: set to true if -I- is set? 667 Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir); 668 669 Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes); 670 671 // If verbose, print the list of directories that will be searched. 672 if (Verbose) { 673 llvm::errs() << "#include \"...\" search starts here:\n"; 674 for (unsigned i = 0, e = SearchList.size(); i != e; ++i) { 675 if (i == NumQuoted) 676 llvm::errs() << "#include <...> search starts here:\n"; 677 const char *Name = SearchList[i].getName(); 678 const char *Suffix; 679 if (SearchList[i].isNormalDir()) 680 Suffix = ""; 681 else if (SearchList[i].isFramework()) 682 Suffix = " (framework directory)"; 683 else { 684 assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup"); 685 Suffix = " (headermap)"; 686 } 687 llvm::errs() << " " << Name << Suffix << "\n"; 688 } 689 llvm::errs() << "End of search list.\n"; 690 } 691 } 692 693 void clang::ApplyHeaderSearchOptions(HeaderSearch &HS, 694 const HeaderSearchOptions &HSOpts, 695 const LangOptions &Lang, 696 const llvm::Triple &Triple) { 697 InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot); 698 699 // Add the user defined entries. 700 for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) { 701 const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i]; 702 if (E.IgnoreSysRoot) { 703 Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework); 704 } else { 705 Init.AddPath(E.Path, E.Group, E.IsFramework); 706 } 707 } 708 709 Init.AddDefaultIncludePaths(Lang, Triple, HSOpts); 710 711 for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i) 712 Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix, 713 HSOpts.SystemHeaderPrefixes[i].IsSystemHeader); 714 715 if (HSOpts.UseBuiltinIncludes) { 716 // Set up the builtin include directory in the module map. 717 SmallString<128> P = StringRef(HSOpts.ResourceDir); 718 llvm::sys::path::append(P, "include"); 719 if (const DirectoryEntry *Dir = HS.getFileMgr().getDirectory(P)) 720 HS.getModuleMap().setBuiltinIncludeDir(Dir); 721 } 722 723 Init.Realize(Lang); 724 } 725
