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::FreeBSD: 231 case llvm::Triple::NetBSD: 232 case llvm::Triple::OpenBSD: 233 case llvm::Triple::Bitrig: 234 break; 235 default: 236 // FIXME: temporary hack: hard-coded paths. 237 AddPath("/usr/local/include", System, false); 238 break; 239 } 240 } 241 242 // Builtin includes use #include_next directives and should be positioned 243 // just prior C include dirs. 244 if (HSOpts.UseBuiltinIncludes) { 245 // Ignore the sys root, we *always* look for clang headers relative to 246 // supplied path. 247 SmallString<128> P = StringRef(HSOpts.ResourceDir); 248 llvm::sys::path::append(P, "include"); 249 AddUnmappedPath(P.str(), ExternCSystem, false); 250 } 251 252 // All remaining additions are for system include directories, early exit if 253 // we aren't using them. 254 if (!HSOpts.UseStandardSystemIncludes) 255 return; 256 257 // Add dirs specified via 'configure --with-c-include-dirs'. 258 StringRef CIncludeDirs(C_INCLUDE_DIRS); 259 if (CIncludeDirs != "") { 260 SmallVector<StringRef, 5> dirs; 261 CIncludeDirs.split(dirs, ":"); 262 for (SmallVectorImpl<StringRef>::iterator i = dirs.begin(); 263 i != dirs.end(); 264 ++i) 265 AddPath(*i, ExternCSystem, false); 266 return; 267 } 268 269 switch (os) { 270 case llvm::Triple::Linux: 271 llvm_unreachable("Include management is handled in the driver."); 272 273 case llvm::Triple::Haiku: 274 AddPath("/boot/common/include", System, false); 275 AddPath("/boot/develop/headers/os", System, false); 276 AddPath("/boot/develop/headers/os/app", System, false); 277 AddPath("/boot/develop/headers/os/arch", System, false); 278 AddPath("/boot/develop/headers/os/device", System, false); 279 AddPath("/boot/develop/headers/os/drivers", System, false); 280 AddPath("/boot/develop/headers/os/game", System, false); 281 AddPath("/boot/develop/headers/os/interface", System, false); 282 AddPath("/boot/develop/headers/os/kernel", System, false); 283 AddPath("/boot/develop/headers/os/locale", System, false); 284 AddPath("/boot/develop/headers/os/mail", System, false); 285 AddPath("/boot/develop/headers/os/media", System, false); 286 AddPath("/boot/develop/headers/os/midi", System, false); 287 AddPath("/boot/develop/headers/os/midi2", System, false); 288 AddPath("/boot/develop/headers/os/net", System, false); 289 AddPath("/boot/develop/headers/os/storage", System, false); 290 AddPath("/boot/develop/headers/os/support", System, false); 291 AddPath("/boot/develop/headers/os/translation", System, false); 292 AddPath("/boot/develop/headers/os/add-ons/graphics", System, false); 293 AddPath("/boot/develop/headers/os/add-ons/input_server", System, false); 294 AddPath("/boot/develop/headers/os/add-ons/screen_saver", System, false); 295 AddPath("/boot/develop/headers/os/add-ons/tracker", System, false); 296 AddPath("/boot/develop/headers/os/be_apps/Deskbar", System, false); 297 AddPath("/boot/develop/headers/os/be_apps/NetPositive", System, false); 298 AddPath("/boot/develop/headers/os/be_apps/Tracker", System, false); 299 AddPath("/boot/develop/headers/cpp", System, false); 300 AddPath("/boot/develop/headers/cpp/i586-pc-haiku", System, false); 301 AddPath("/boot/develop/headers/3rdparty", System, false); 302 AddPath("/boot/develop/headers/bsd", System, false); 303 AddPath("/boot/develop/headers/glibc", System, false); 304 AddPath("/boot/develop/headers/posix", System, false); 305 AddPath("/boot/develop/headers", System, false); 306 break; 307 case llvm::Triple::RTEMS: 308 break; 309 case llvm::Triple::Win32: 310 switch (triple.getEnvironment()) { 311 default: llvm_unreachable("Include management is handled in the driver."); 312 case llvm::Triple::Cygnus: 313 AddPath("/usr/include/w32api", System, false); 314 break; 315 case llvm::Triple::GNU: 316 // mingw-w64 crt include paths 317 // <sysroot>/i686-w64-mingw32/include 318 SmallString<128> P = StringRef(HSOpts.ResourceDir); 319 llvm::sys::path::append(P, "../../../i686-w64-mingw32/include"); 320 AddPath(P.str(), System, false); 321 322 // <sysroot>/x86_64-w64-mingw32/include 323 P.resize(HSOpts.ResourceDir.size()); 324 llvm::sys::path::append(P, "../../../x86_64-w64-mingw32/include"); 325 AddPath(P.str(), System, false); 326 327 // mingw.org crt include paths 328 // <sysroot>/include 329 P.resize(HSOpts.ResourceDir.size()); 330 llvm::sys::path::append(P, "../../../include"); 331 AddPath(P.str(), System, false); 332 AddPath("/mingw/include", System, false); 333 #if defined(LLVM_ON_WIN32) 334 AddPath("c:/mingw/include", System, false); 335 #endif 336 break; 337 } 338 break; 339 default: 340 break; 341 } 342 343 if ( os != llvm::Triple::RTEMS ) 344 AddPath("/usr/include", ExternCSystem, false); 345 } 346 347 void InitHeaderSearch:: 348 AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) { 349 llvm::Triple::OSType os = triple.getOS(); 350 // FIXME: temporary hack: hard-coded paths. 351 352 if (triple.isOSDarwin()) { 353 switch (triple.getArch()) { 354 default: break; 355 356 case llvm::Triple::ppc: 357 case llvm::Triple::ppc64: 358 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 359 "powerpc-apple-darwin10", "", "ppc64", 360 triple); 361 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0", 362 "powerpc-apple-darwin10", "", "ppc64", 363 triple); 364 break; 365 366 case llvm::Triple::x86: 367 case llvm::Triple::x86_64: 368 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 369 "i686-apple-darwin10", "", "x86_64", triple); 370 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0", 371 "i686-apple-darwin8", "", "", triple); 372 break; 373 374 case llvm::Triple::arm: 375 case llvm::Triple::thumb: 376 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 377 "arm-apple-darwin10", "v7", "", triple); 378 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 379 "arm-apple-darwin10", "v6", "", triple); 380 break; 381 382 case llvm::Triple::aarch64: 383 case llvm::Triple::arm64: 384 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 385 "arm64-apple-darwin10", "", "", triple); 386 break; 387 } 388 return; 389 } 390 391 switch (os) { 392 case llvm::Triple::Linux: 393 llvm_unreachable("Include management is handled in the driver."); 394 395 case llvm::Triple::Win32: 396 switch (triple.getEnvironment()) { 397 default: llvm_unreachable("Include management is handled in the driver."); 398 case llvm::Triple::Cygnus: 399 // Cygwin-1.7 400 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3"); 401 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3"); 402 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4"); 403 // g++-4 / Cygwin-1.5 404 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2"); 405 break; 406 case llvm::Triple::GNU: 407 // mingw-w64 C++ include paths (i686-w64-mingw32 and x86_64-w64-mingw32) 408 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.0"); 409 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.1"); 410 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.2"); 411 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.3"); 412 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.8.0"); 413 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.8.1"); 414 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.8.2"); 415 // mingw.org C++ include paths 416 #if defined(LLVM_ON_WIN32) 417 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.0"); 418 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.1"); 419 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.2"); 420 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.7.3"); 421 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.0"); 422 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.1"); 423 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.2"); 424 #endif 425 break; 426 } 427 case llvm::Triple::DragonFly: 428 if (llvm::sys::fs::exists("/usr/lib/gcc47")) 429 AddPath("/usr/include/c++/4.7", CXXSystem, false); 430 else 431 AddPath("/usr/include/c++/4.4", CXXSystem, false); 432 break; 433 case llvm::Triple::OpenBSD: { 434 std::string t = triple.getTriple(); 435 if (t.substr(0, 6) == "x86_64") 436 t.replace(0, 6, "amd64"); 437 AddGnuCPlusPlusIncludePaths("/usr/include/g++", 438 t, "", "", triple); 439 break; 440 } 441 case llvm::Triple::Minix: 442 AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3", 443 "", "", "", triple); 444 break; 445 case llvm::Triple::Solaris: 446 AddGnuCPlusPlusIncludePaths("/usr/gcc/4.5/include/c++/4.5.2/", 447 "i386-pc-solaris2.11", "", "", triple); 448 // Solaris - Fall though.. 449 case llvm::Triple::AuroraUX: 450 // AuroraUX 451 AddGnuCPlusPlusIncludePaths("/opt/gcc4/include/c++/4.2.4", 452 "i386-pc-solaris2.11", "", "", triple); 453 break; 454 default: 455 break; 456 } 457 } 458 459 void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang, 460 const llvm::Triple &triple, 461 const HeaderSearchOptions &HSOpts) { 462 // NB: This code path is going away. All of the logic is moving into the 463 // driver which has the information necessary to do target-specific 464 // selections of default include paths. Each target which moves there will be 465 // exempted from this logic here until we can delete the entire pile of code. 466 switch (triple.getOS()) { 467 default: 468 break; // Everything else continues to use this routine's logic. 469 470 case llvm::Triple::Linux: 471 return; 472 473 case llvm::Triple::Win32: 474 if (triple.getEnvironment() == llvm::Triple::MSVC || 475 triple.getEnvironment() == llvm::Triple::Itanium || 476 triple.getObjectFormat() == llvm::Triple::MachO) 477 return; 478 break; 479 } 480 481 if (Lang.CPlusPlus && HSOpts.UseStandardCXXIncludes && 482 HSOpts.UseStandardSystemIncludes) { 483 if (HSOpts.UseLibcxx) { 484 if (triple.isOSDarwin()) { 485 // On Darwin, libc++ may be installed alongside the compiler in 486 // include/c++/v1. 487 if (!HSOpts.ResourceDir.empty()) { 488 // Remove version from foo/lib/clang/version 489 StringRef NoVer = llvm::sys::path::parent_path(HSOpts.ResourceDir); 490 // Remove clang from foo/lib/clang 491 StringRef Lib = llvm::sys::path::parent_path(NoVer); 492 // Remove lib from foo/lib 493 SmallString<128> P = llvm::sys::path::parent_path(Lib); 494 495 // Get foo/include/c++/v1 496 llvm::sys::path::append(P, "include", "c++", "v1"); 497 AddUnmappedPath(P.str(), CXXSystem, false); 498 } 499 } 500 // On Solaris, include the support directory for things like xlocale and 501 // fudged system headers. 502 if (triple.getOS() == llvm::Triple::Solaris) 503 AddPath("/usr/include/c++/v1/support/solaris", CXXSystem, false); 504 505 AddPath("/usr/include/c++/v1", CXXSystem, false); 506 } else { 507 AddDefaultCPlusPlusIncludePaths(triple, HSOpts); 508 } 509 } 510 511 AddDefaultCIncludePaths(triple, HSOpts); 512 513 // Add the default framework include paths on Darwin. 514 if (HSOpts.UseStandardSystemIncludes) { 515 if (triple.isOSDarwin()) { 516 AddPath("/System/Library/Frameworks", System, true); 517 AddPath("/Library/Frameworks", System, true); 518 } 519 } 520 } 521 522 /// RemoveDuplicates - If there are duplicate directory entries in the specified 523 /// search list, remove the later (dead) ones. Returns the number of non-system 524 /// headers removed, which is used to update NumAngled. 525 static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList, 526 unsigned First, bool Verbose) { 527 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs; 528 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs; 529 llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps; 530 unsigned NonSystemRemoved = 0; 531 for (unsigned i = First; i != SearchList.size(); ++i) { 532 unsigned DirToRemove = i; 533 534 const DirectoryLookup &CurEntry = SearchList[i]; 535 536 if (CurEntry.isNormalDir()) { 537 // If this isn't the first time we've seen this dir, remove it. 538 if (SeenDirs.insert(CurEntry.getDir())) 539 continue; 540 } else if (CurEntry.isFramework()) { 541 // If this isn't the first time we've seen this framework dir, remove it. 542 if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir())) 543 continue; 544 } else { 545 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 546 // If this isn't the first time we've seen this headermap, remove it. 547 if (SeenHeaderMaps.insert(CurEntry.getHeaderMap())) 548 continue; 549 } 550 551 // If we have a normal #include dir/framework/headermap that is shadowed 552 // later in the chain by a system include location, we actually want to 553 // ignore the user's request and drop the user dir... keeping the system 554 // dir. This is weird, but required to emulate GCC's search path correctly. 555 // 556 // Since dupes of system dirs are rare, just rescan to find the original 557 // that we're nuking instead of using a DenseMap. 558 if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) { 559 // Find the dir that this is the same of. 560 unsigned FirstDir; 561 for (FirstDir = 0; ; ++FirstDir) { 562 assert(FirstDir != i && "Didn't find dupe?"); 563 564 const DirectoryLookup &SearchEntry = SearchList[FirstDir]; 565 566 // If these are different lookup types, then they can't be the dupe. 567 if (SearchEntry.getLookupType() != CurEntry.getLookupType()) 568 continue; 569 570 bool isSame; 571 if (CurEntry.isNormalDir()) 572 isSame = SearchEntry.getDir() == CurEntry.getDir(); 573 else if (CurEntry.isFramework()) 574 isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir(); 575 else { 576 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 577 isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap(); 578 } 579 580 if (isSame) 581 break; 582 } 583 584 // If the first dir in the search path is a non-system dir, zap it 585 // instead of the system one. 586 if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User) 587 DirToRemove = FirstDir; 588 } 589 590 if (Verbose) { 591 llvm::errs() << "ignoring duplicate directory \"" 592 << CurEntry.getName() << "\"\n"; 593 if (DirToRemove != i) 594 llvm::errs() << " as it is a non-system directory that duplicates " 595 << "a system directory\n"; 596 } 597 if (DirToRemove != i) 598 ++NonSystemRemoved; 599 600 // This is reached if the current entry is a duplicate. Remove the 601 // DirToRemove (usually the current dir). 602 SearchList.erase(SearchList.begin()+DirToRemove); 603 --i; 604 } 605 return NonSystemRemoved; 606 } 607 608 609 void InitHeaderSearch::Realize(const LangOptions &Lang) { 610 // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList. 611 std::vector<DirectoryLookup> SearchList; 612 SearchList.reserve(IncludePath.size()); 613 614 // Quoted arguments go first. 615 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 616 it != ie; ++it) { 617 if (it->first == Quoted) 618 SearchList.push_back(it->second); 619 } 620 // Deduplicate and remember index. 621 RemoveDuplicates(SearchList, 0, Verbose); 622 unsigned NumQuoted = SearchList.size(); 623 624 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 625 it != ie; ++it) { 626 if (it->first == Angled || it->first == IndexHeaderMap) 627 SearchList.push_back(it->second); 628 } 629 630 RemoveDuplicates(SearchList, NumQuoted, Verbose); 631 unsigned NumAngled = SearchList.size(); 632 633 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 634 it != ie; ++it) { 635 if (it->first == System || it->first == ExternCSystem || 636 (!Lang.ObjC1 && !Lang.CPlusPlus && it->first == CSystem) || 637 (/*FIXME !Lang.ObjC1 && */Lang.CPlusPlus && it->first == CXXSystem) || 638 (Lang.ObjC1 && !Lang.CPlusPlus && it->first == ObjCSystem) || 639 (Lang.ObjC1 && Lang.CPlusPlus && it->first == ObjCXXSystem)) 640 SearchList.push_back(it->second); 641 } 642 643 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 644 it != ie; ++it) { 645 if (it->first == After) 646 SearchList.push_back(it->second); 647 } 648 649 // Remove duplicates across both the Angled and System directories. GCC does 650 // this and failing to remove duplicates across these two groups breaks 651 // #include_next. 652 unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose); 653 NumAngled -= NonSystemRemoved; 654 655 bool DontSearchCurDir = false; // TODO: set to true if -I- is set? 656 Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir); 657 658 Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes); 659 660 // If verbose, print the list of directories that will be searched. 661 if (Verbose) { 662 llvm::errs() << "#include \"...\" search starts here:\n"; 663 for (unsigned i = 0, e = SearchList.size(); i != e; ++i) { 664 if (i == NumQuoted) 665 llvm::errs() << "#include <...> search starts here:\n"; 666 const char *Name = SearchList[i].getName(); 667 const char *Suffix; 668 if (SearchList[i].isNormalDir()) 669 Suffix = ""; 670 else if (SearchList[i].isFramework()) 671 Suffix = " (framework directory)"; 672 else { 673 assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup"); 674 Suffix = " (headermap)"; 675 } 676 llvm::errs() << " " << Name << Suffix << "\n"; 677 } 678 llvm::errs() << "End of search list.\n"; 679 } 680 } 681 682 void clang::ApplyHeaderSearchOptions(HeaderSearch &HS, 683 const HeaderSearchOptions &HSOpts, 684 const LangOptions &Lang, 685 const llvm::Triple &Triple) { 686 InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot); 687 688 // Add the user defined entries. 689 for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) { 690 const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i]; 691 if (E.IgnoreSysRoot) { 692 Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework); 693 } else { 694 Init.AddPath(E.Path, E.Group, E.IsFramework); 695 } 696 } 697 698 Init.AddDefaultIncludePaths(Lang, Triple, HSOpts); 699 700 for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i) 701 Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix, 702 HSOpts.SystemHeaderPrefixes[i].IsSystemHeader); 703 704 if (HSOpts.UseBuiltinIncludes) { 705 // Set up the builtin include directory in the module map. 706 SmallString<128> P = StringRef(HSOpts.ResourceDir); 707 llvm::sys::path::append(P, "include"); 708 if (const DirectoryEntry *Dir = HS.getFileMgr().getDirectory(P.str())) 709 HS.getModuleMap().setBuiltinIncludeDir(Dir); 710 } 711 712 Init.Realize(Lang); 713 } 714
