InitHeaderSearch.cpp revision 263508
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/Basic/Version.h" 18#include "clang/Config/config.h" // C_INCLUDE_DIRS 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 32using namespace clang; 33using namespace clang::frontend; 34 35namespace { 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. 40class 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 50public: 51 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. 68 void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) { 69 SystemHeaderPrefixes.push_back(std::make_pair(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 /// AddMinGW64CXXPaths - Add the necessary paths to support 87 /// libstdc++ of x86_64-w64-mingw32 aka mingw-w64. 88 void AddMinGW64CXXPaths(StringRef Base, 89 StringRef Version); 90 91 // AddDefaultCIncludePaths - Add paths that should always be searched. 92 void AddDefaultCIncludePaths(const llvm::Triple &triple, 93 const HeaderSearchOptions &HSOpts); 94 95 // AddDefaultCPlusPlusIncludePaths - Add paths that should be searched when 96 // compiling c++. 97 void AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, 98 const HeaderSearchOptions &HSOpts); 99 100 /// AddDefaultSystemIncludePaths - Adds the default system include paths so 101 /// that e.g. stdio.h is found. 102 void AddDefaultIncludePaths(const LangOptions &Lang, 103 const llvm::Triple &triple, 104 const HeaderSearchOptions &HSOpts); 105 106 /// Realize - Merges all search path lists into one list and send it to 107 /// HeaderSearch. 108 void Realize(const LangOptions &Lang); 109}; 110 111} // end anonymous namespace. 112 113static bool CanPrefixSysroot(StringRef Path) { 114#if defined(_WIN32) 115 return !Path.empty() && llvm::sys::path::is_separator(Path[0]); 116#else 117 return llvm::sys::path::is_absolute(Path); 118#endif 119} 120 121void InitHeaderSearch::AddPath(const Twine &Path, IncludeDirGroup Group, 122 bool isFramework) { 123 // Add the path with sysroot prepended, if desired and this is a system header 124 // group. 125 if (HasSysroot) { 126 SmallString<256> MappedPathStorage; 127 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage); 128 if (CanPrefixSysroot(MappedPathStr)) { 129 AddUnmappedPath(IncludeSysroot + Path, Group, isFramework); 130 return; 131 } 132 } 133 134 AddUnmappedPath(Path, Group, isFramework); 135} 136 137void InitHeaderSearch::AddUnmappedPath(const Twine &Path, IncludeDirGroup Group, 138 bool isFramework) { 139 assert(!Path.isTriviallyEmpty() && "can't handle empty path here"); 140 141 FileManager &FM = Headers.getFileMgr(); 142 SmallString<256> MappedPathStorage; 143 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage); 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 (const DirectoryEntry *DE = FM.getDirectory(MappedPathStr)) { 157 IncludePath.push_back( 158 std::make_pair(Group, DirectoryLookup(DE, Type, isFramework))); 159 return; 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 (const FileEntry *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; 172 } 173 } 174 } 175 176 if (Verbose) 177 llvm::errs() << "ignoring nonexistent directory \"" 178 << MappedPathStr << "\"\n"; 179} 180 181void InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base, 182 StringRef ArchDir, 183 StringRef Dir32, 184 StringRef Dir64, 185 const llvm::Triple &triple) { 186 // Add the base dir 187 AddPath(Base, CXXSystem, false); 188 189 // Add the multilib dirs 190 llvm::Triple::ArchType arch = triple.getArch(); 191 bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64; 192 if (is64bit) 193 AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, false); 194 else 195 AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, false); 196 197 // Add the backward dir 198 AddPath(Base + "/backward", CXXSystem, false); 199} 200 201void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base, 202 StringRef Arch, 203 StringRef Version) { 204 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++", 205 CXXSystem, false); 206 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch, 207 CXXSystem, false); 208 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward", 209 CXXSystem, false); 210} 211 212void InitHeaderSearch::AddMinGW64CXXPaths(StringRef Base, 213 StringRef Version) { 214 // Assumes Base is HeaderSearchOpts' ResourceDir 215 AddPath(Base + "/../../../include/c++/" + Version, 216 CXXSystem, false); 217 AddPath(Base + "/../../../include/c++/" + Version + "/x86_64-w64-mingw32", 218 CXXSystem, false); 219 AddPath(Base + "/../../../include/c++/" + Version + "/i686-w64-mingw32", 220 CXXSystem, false); 221 AddPath(Base + "/../../../include/c++/" + Version + "/backward", 222 CXXSystem, false); 223} 224 225void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple, 226 const HeaderSearchOptions &HSOpts) { 227 llvm::Triple::OSType os = triple.getOS(); 228 229 if (HSOpts.UseStandardSystemIncludes) { 230 switch (os) { 231 case llvm::Triple::FreeBSD: 232 case llvm::Triple::NetBSD: 233 case llvm::Triple::OpenBSD: 234 case llvm::Triple::Bitrig: 235 break; 236 default: 237 // FIXME: temporary hack: hard-coded paths. 238 AddPath("/usr/local/include", System, false); 239 break; 240 } 241 } 242 243 // Builtin includes use #include_next directives and should be positioned 244 // just prior C include dirs. 245 if (HSOpts.UseBuiltinIncludes) { 246 // Ignore the sys root, we *always* look for clang headers relative to 247 // supplied path. 248 SmallString<128> P = StringRef(HSOpts.ResourceDir); 249 llvm::sys::path::append(P, "include"); 250 AddUnmappedPath(P.str(), ExternCSystem, false); 251 } 252 253 // All remaining additions are for system include directories, early exit if 254 // we aren't using them. 255 if (!HSOpts.UseStandardSystemIncludes) 256 return; 257 258 // Add dirs specified via 'configure --with-c-include-dirs'. 259 StringRef CIncludeDirs(C_INCLUDE_DIRS); 260 if (CIncludeDirs != "") { 261 SmallVector<StringRef, 5> dirs; 262 CIncludeDirs.split(dirs, ":"); 263 for (SmallVectorImpl<StringRef>::iterator i = dirs.begin(); 264 i != dirs.end(); 265 ++i) 266 AddPath(*i, ExternCSystem, false); 267 return; 268 } 269 270 switch (os) { 271 case llvm::Triple::Linux: 272 case llvm::Triple::Win32: 273 llvm_unreachable("Include management is handled in the driver."); 274 275 case llvm::Triple::Haiku: 276 AddPath("/boot/common/include", System, false); 277 AddPath("/boot/develop/headers/os", System, false); 278 AddPath("/boot/develop/headers/os/app", System, false); 279 AddPath("/boot/develop/headers/os/arch", System, false); 280 AddPath("/boot/develop/headers/os/device", System, false); 281 AddPath("/boot/develop/headers/os/drivers", System, false); 282 AddPath("/boot/develop/headers/os/game", System, false); 283 AddPath("/boot/develop/headers/os/interface", System, false); 284 AddPath("/boot/develop/headers/os/kernel", System, false); 285 AddPath("/boot/develop/headers/os/locale", System, false); 286 AddPath("/boot/develop/headers/os/mail", System, false); 287 AddPath("/boot/develop/headers/os/media", System, false); 288 AddPath("/boot/develop/headers/os/midi", System, false); 289 AddPath("/boot/develop/headers/os/midi2", System, false); 290 AddPath("/boot/develop/headers/os/net", System, false); 291 AddPath("/boot/develop/headers/os/storage", System, false); 292 AddPath("/boot/develop/headers/os/support", System, false); 293 AddPath("/boot/develop/headers/os/translation", System, false); 294 AddPath("/boot/develop/headers/os/add-ons/graphics", System, false); 295 AddPath("/boot/develop/headers/os/add-ons/input_server", System, false); 296 AddPath("/boot/develop/headers/os/add-ons/screen_saver", System, false); 297 AddPath("/boot/develop/headers/os/add-ons/tracker", System, false); 298 AddPath("/boot/develop/headers/os/be_apps/Deskbar", System, false); 299 AddPath("/boot/develop/headers/os/be_apps/NetPositive", System, false); 300 AddPath("/boot/develop/headers/os/be_apps/Tracker", System, false); 301 AddPath("/boot/develop/headers/cpp", System, false); 302 AddPath("/boot/develop/headers/cpp/i586-pc-haiku", System, false); 303 AddPath("/boot/develop/headers/3rdparty", System, false); 304 AddPath("/boot/develop/headers/bsd", System, false); 305 AddPath("/boot/develop/headers/glibc", System, false); 306 AddPath("/boot/develop/headers/posix", System, false); 307 AddPath("/boot/develop/headers", System, false); 308 break; 309 case llvm::Triple::RTEMS: 310 break; 311 case llvm::Triple::Cygwin: 312 AddPath("/usr/include/w32api", System, false); 313 break; 314 case llvm::Triple::MinGW32: { 315 // mingw-w64 crt include paths 316 // <sysroot>/i686-w64-mingw32/include 317 SmallString<128> P = StringRef(HSOpts.ResourceDir); 318 llvm::sys::path::append(P, "../../../i686-w64-mingw32/include"); 319 AddPath(P.str(), System, false); 320 321 // <sysroot>/x86_64-w64-mingw32/include 322 P.resize(HSOpts.ResourceDir.size()); 323 llvm::sys::path::append(P, "../../../x86_64-w64-mingw32/include"); 324 AddPath(P.str(), System, false); 325 326 // mingw.org crt include paths 327 // <sysroot>/include 328 P.resize(HSOpts.ResourceDir.size()); 329 llvm::sys::path::append(P, "../../../include"); 330 AddPath(P.str(), System, false); 331 AddPath("/mingw/include", System, false); 332#if defined(_WIN32) 333 AddPath("c:/mingw/include", System, false); 334#endif 335 } 336 break; 337 case llvm::Triple::FreeBSD: 338 AddPath("/usr/include/clang/" CLANG_VERSION_STRING, System, false); 339 break; 340 341 default: 342 break; 343 } 344 345 if ( os != llvm::Triple::RTEMS ) 346 AddPath("/usr/include", ExternCSystem, false); 347} 348 349void InitHeaderSearch:: 350AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) { 351 llvm::Triple::OSType os = triple.getOS(); 352 // FIXME: temporary hack: hard-coded paths. 353 354 if (triple.isOSDarwin()) { 355 switch (triple.getArch()) { 356 default: break; 357 358 case llvm::Triple::ppc: 359 case llvm::Triple::ppc64: 360 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 361 "powerpc-apple-darwin10", "", "ppc64", 362 triple); 363 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0", 364 "powerpc-apple-darwin10", "", "ppc64", 365 triple); 366 break; 367 368 case llvm::Triple::x86: 369 case llvm::Triple::x86_64: 370 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 371 "i686-apple-darwin10", "", "x86_64", triple); 372 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0", 373 "i686-apple-darwin8", "", "", triple); 374 break; 375 376 case llvm::Triple::arm: 377 case llvm::Triple::thumb: 378 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 379 "arm-apple-darwin10", "v7", "", triple); 380 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1", 381 "arm-apple-darwin10", "v6", "", triple); 382 break; 383 } 384 return; 385 } 386 387 switch (os) { 388 case llvm::Triple::Linux: 389 case llvm::Triple::Win32: 390 llvm_unreachable("Include management is handled in the driver."); 391 392 case llvm::Triple::Cygwin: 393 // Cygwin-1.7 394 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3"); 395 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3"); 396 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4"); 397 // g++-4 / Cygwin-1.5 398 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2"); 399 break; 400 case llvm::Triple::MinGW32: 401 // mingw-w64 C++ include paths (i686-w64-mingw32 and x86_64-w64-mingw32) 402 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.0"); 403 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.1"); 404 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.2"); 405 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.3"); 406 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.4"); 407 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.0"); 408 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.1"); 409 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.2"); 410 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.3"); 411 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.0"); 412 // mingw.org C++ include paths 413 AddMinGWCPlusPlusIncludePaths("/mingw/lib/gcc", "mingw32", "4.5.2"); //MSYS 414#if defined(_WIN32) 415 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.8.1"); 416 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.6.2"); 417 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.6.1"); 418 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.2"); 419 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.0"); 420 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.4.0"); 421 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.3.0"); 422#endif 423 break; 424 case llvm::Triple::DragonFly: 425 if (llvm::sys::fs::exists("/usr/lib/gcc47")) 426 AddPath("/usr/include/c++/4.7", CXXSystem, false); 427 else 428 AddPath("/usr/include/c++/4.4", CXXSystem, false); 429 break; 430 case llvm::Triple::OpenBSD: { 431 std::string t = triple.getTriple(); 432 if (t.substr(0, 6) == "x86_64") 433 t.replace(0, 6, "amd64"); 434 AddGnuCPlusPlusIncludePaths("/usr/include/g++", 435 t, "", "", triple); 436 break; 437 } 438 case llvm::Triple::Minix: 439 AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3", 440 "", "", "", triple); 441 break; 442 case llvm::Triple::Solaris: 443 AddGnuCPlusPlusIncludePaths("/usr/gcc/4.5/include/c++/4.5.2/", 444 "i386-pc-solaris2.11", "", "", triple); 445 // Solaris - Fall though.. 446 case llvm::Triple::AuroraUX: 447 // AuroraUX 448 AddGnuCPlusPlusIncludePaths("/opt/gcc4/include/c++/4.2.4", 449 "i386-pc-solaris2.11", "", "", triple); 450 break; 451 default: 452 break; 453 } 454} 455 456void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang, 457 const llvm::Triple &triple, 458 const HeaderSearchOptions &HSOpts) { 459 // NB: This code path is going away. All of the logic is moving into the 460 // driver which has the information necessary to do target-specific 461 // selections of default include paths. Each target which moves there will be 462 // exempted from this logic here until we can delete the entire pile of code. 463 switch (triple.getOS()) { 464 default: 465 break; // Everything else continues to use this routine's logic. 466 467 case llvm::Triple::Linux: 468 case llvm::Triple::Win32: 469 return; 470 } 471 472 if (Lang.CPlusPlus && HSOpts.UseStandardCXXIncludes && 473 HSOpts.UseStandardSystemIncludes) { 474 if (HSOpts.UseLibcxx) { 475 if (triple.isOSDarwin()) { 476 // On Darwin, libc++ may be installed alongside the compiler in 477 // include/c++/v1. 478 if (!HSOpts.ResourceDir.empty()) { 479 // Remove version from foo/lib/clang/version 480 StringRef NoVer = llvm::sys::path::parent_path(HSOpts.ResourceDir); 481 // Remove clang from foo/lib/clang 482 StringRef Lib = llvm::sys::path::parent_path(NoVer); 483 // Remove lib from foo/lib 484 SmallString<128> P = llvm::sys::path::parent_path(Lib); 485 486 // Get foo/include/c++/v1 487 llvm::sys::path::append(P, "include", "c++", "v1"); 488 AddUnmappedPath(P.str(), CXXSystem, false); 489 } 490 } 491 // On Solaris, include the support directory for things like xlocale and 492 // fudged system headers. 493 if (triple.getOS() == llvm::Triple::Solaris) 494 AddPath("/usr/include/c++/v1/support/solaris", CXXSystem, false); 495 496 AddPath("/usr/include/c++/v1", CXXSystem, false); 497 } else { 498 AddDefaultCPlusPlusIncludePaths(triple, HSOpts); 499 } 500 } 501 502 AddDefaultCIncludePaths(triple, HSOpts); 503 504 // Add the default framework include paths on Darwin. 505 if (HSOpts.UseStandardSystemIncludes) { 506 if (triple.isOSDarwin()) { 507 AddPath("/System/Library/Frameworks", System, true); 508 AddPath("/Library/Frameworks", System, true); 509 } 510 } 511} 512 513/// RemoveDuplicates - If there are duplicate directory entries in the specified 514/// search list, remove the later (dead) ones. Returns the number of non-system 515/// headers removed, which is used to update NumAngled. 516static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList, 517 unsigned First, bool Verbose) { 518 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs; 519 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs; 520 llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps; 521 unsigned NonSystemRemoved = 0; 522 for (unsigned i = First; i != SearchList.size(); ++i) { 523 unsigned DirToRemove = i; 524 525 const DirectoryLookup &CurEntry = SearchList[i]; 526 527 if (CurEntry.isNormalDir()) { 528 // If this isn't the first time we've seen this dir, remove it. 529 if (SeenDirs.insert(CurEntry.getDir())) 530 continue; 531 } else if (CurEntry.isFramework()) { 532 // If this isn't the first time we've seen this framework dir, remove it. 533 if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir())) 534 continue; 535 } else { 536 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 537 // If this isn't the first time we've seen this headermap, remove it. 538 if (SeenHeaderMaps.insert(CurEntry.getHeaderMap())) 539 continue; 540 } 541 542 // If we have a normal #include dir/framework/headermap that is shadowed 543 // later in the chain by a system include location, we actually want to 544 // ignore the user's request and drop the user dir... keeping the system 545 // dir. This is weird, but required to emulate GCC's search path correctly. 546 // 547 // Since dupes of system dirs are rare, just rescan to find the original 548 // that we're nuking instead of using a DenseMap. 549 if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) { 550 // Find the dir that this is the same of. 551 unsigned FirstDir; 552 for (FirstDir = 0; ; ++FirstDir) { 553 assert(FirstDir != i && "Didn't find dupe?"); 554 555 const DirectoryLookup &SearchEntry = SearchList[FirstDir]; 556 557 // If these are different lookup types, then they can't be the dupe. 558 if (SearchEntry.getLookupType() != CurEntry.getLookupType()) 559 continue; 560 561 bool isSame; 562 if (CurEntry.isNormalDir()) 563 isSame = SearchEntry.getDir() == CurEntry.getDir(); 564 else if (CurEntry.isFramework()) 565 isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir(); 566 else { 567 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?"); 568 isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap(); 569 } 570 571 if (isSame) 572 break; 573 } 574 575 // If the first dir in the search path is a non-system dir, zap it 576 // instead of the system one. 577 if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User) 578 DirToRemove = FirstDir; 579 } 580 581 if (Verbose) { 582 llvm::errs() << "ignoring duplicate directory \"" 583 << CurEntry.getName() << "\"\n"; 584 if (DirToRemove != i) 585 llvm::errs() << " as it is a non-system directory that duplicates " 586 << "a system directory\n"; 587 } 588 if (DirToRemove != i) 589 ++NonSystemRemoved; 590 591 // This is reached if the current entry is a duplicate. Remove the 592 // DirToRemove (usually the current dir). 593 SearchList.erase(SearchList.begin()+DirToRemove); 594 --i; 595 } 596 return NonSystemRemoved; 597} 598 599 600void InitHeaderSearch::Realize(const LangOptions &Lang) { 601 // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList. 602 std::vector<DirectoryLookup> SearchList; 603 SearchList.reserve(IncludePath.size()); 604 605 // Quoted arguments go first. 606 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 607 it != ie; ++it) { 608 if (it->first == Quoted) 609 SearchList.push_back(it->second); 610 } 611 // Deduplicate and remember index. 612 RemoveDuplicates(SearchList, 0, Verbose); 613 unsigned NumQuoted = SearchList.size(); 614 615 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 616 it != ie; ++it) { 617 if (it->first == Angled || it->first == IndexHeaderMap) 618 SearchList.push_back(it->second); 619 } 620 621 RemoveDuplicates(SearchList, NumQuoted, Verbose); 622 unsigned NumAngled = SearchList.size(); 623 624 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 625 it != ie; ++it) { 626 if (it->first == System || it->first == ExternCSystem || 627 (!Lang.ObjC1 && !Lang.CPlusPlus && it->first == CSystem) || 628 (/*FIXME !Lang.ObjC1 && */Lang.CPlusPlus && it->first == CXXSystem) || 629 (Lang.ObjC1 && !Lang.CPlusPlus && it->first == ObjCSystem) || 630 (Lang.ObjC1 && Lang.CPlusPlus && it->first == ObjCXXSystem)) 631 SearchList.push_back(it->second); 632 } 633 634 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end(); 635 it != ie; ++it) { 636 if (it->first == After) 637 SearchList.push_back(it->second); 638 } 639 640 // Remove duplicates across both the Angled and System directories. GCC does 641 // this and failing to remove duplicates across these two groups breaks 642 // #include_next. 643 unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose); 644 NumAngled -= NonSystemRemoved; 645 646 bool DontSearchCurDir = false; // TODO: set to true if -I- is set? 647 Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir); 648 649 Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes); 650 651 // If verbose, print the list of directories that will be searched. 652 if (Verbose) { 653 llvm::errs() << "#include \"...\" search starts here:\n"; 654 for (unsigned i = 0, e = SearchList.size(); i != e; ++i) { 655 if (i == NumQuoted) 656 llvm::errs() << "#include <...> search starts here:\n"; 657 const char *Name = SearchList[i].getName(); 658 const char *Suffix; 659 if (SearchList[i].isNormalDir()) 660 Suffix = ""; 661 else if (SearchList[i].isFramework()) 662 Suffix = " (framework directory)"; 663 else { 664 assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup"); 665 Suffix = " (headermap)"; 666 } 667 llvm::errs() << " " << Name << Suffix << "\n"; 668 } 669 llvm::errs() << "End of search list.\n"; 670 } 671} 672 673void clang::ApplyHeaderSearchOptions(HeaderSearch &HS, 674 const HeaderSearchOptions &HSOpts, 675 const LangOptions &Lang, 676 const llvm::Triple &Triple) { 677 InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot); 678 679 // Add the user defined entries. 680 for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) { 681 const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i]; 682 if (E.IgnoreSysRoot) { 683 Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework); 684 } else { 685 Init.AddPath(E.Path, E.Group, E.IsFramework); 686 } 687 } 688 689 Init.AddDefaultIncludePaths(Lang, Triple, HSOpts); 690 691 for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i) 692 Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix, 693 HSOpts.SystemHeaderPrefixes[i].IsSystemHeader); 694 695 if (HSOpts.UseBuiltinIncludes) { 696 // Set up the builtin include directory in the module map. 697 SmallString<128> P = StringRef(HSOpts.ResourceDir); 698 llvm::sys::path::append(P, "include"); 699 if (const DirectoryEntry *Dir = HS.getFileMgr().getDirectory(P.str())) 700 HS.getModuleMap().setBuiltinIncludeDir(Dir); 701 } 702 703 Init.Realize(Lang); 704} 705