1 //===--- InitHeaderSearch.cpp - Initialize header search paths ------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the InitHeaderSearch class.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "clang/Basic/FileManager.h"
14 #include "clang/Basic/LangOptions.h"
15 #include "clang/Config/config.h" // C_INCLUDE_DIRS
16 #include "clang/Frontend/FrontendDiagnostic.h"
17 #include "clang/Frontend/Utils.h"
18 #include "clang/Lex/HeaderMap.h"
19 #include "clang/Lex/HeaderSearch.h"
20 #include "clang/Lex/HeaderSearchOptions.h"
21 #include "llvm/ADT/SmallPtrSet.h"
22 #include "llvm/ADT/SmallString.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/Triple.h"
26 #include "llvm/ADT/Twine.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/Path.h"
29 #include "llvm/Support/raw_ostream.h"
30
31 using namespace clang;
32 using namespace clang::frontend;
33
34 namespace {
35 /// Holds information about a single DirectoryLookup object.
36 struct DirectoryLookupInfo {
37 IncludeDirGroup Group;
38 DirectoryLookup Lookup;
39
DirectoryLookupInfo__anon3858ab560111::DirectoryLookupInfo40 DirectoryLookupInfo(IncludeDirGroup Group, DirectoryLookup Lookup)
41 : Group(Group), Lookup(Lookup) {}
42 };
43
44 /// InitHeaderSearch - This class makes it easier to set the search paths of
45 /// a HeaderSearch object. InitHeaderSearch stores several search path lists
46 /// internally, which can be sent to a HeaderSearch object in one swoop.
47 class InitHeaderSearch {
48 std::vector<DirectoryLookupInfo> IncludePath;
49 std::vector<std::pair<std::string, bool> > SystemHeaderPrefixes;
50 HeaderSearch &Headers;
51 bool Verbose;
52 std::string IncludeSysroot;
53 bool HasSysroot;
54
55 public:
InitHeaderSearch(HeaderSearch & HS,bool verbose,StringRef sysroot)56 InitHeaderSearch(HeaderSearch &HS, bool verbose, StringRef sysroot)
57 : Headers(HS), Verbose(verbose), IncludeSysroot(std::string(sysroot)),
58 HasSysroot(!(sysroot.empty() || sysroot == "/")) {}
59
60 /// AddPath - Add the specified path to the specified group list, prefixing
61 /// the sysroot if used.
62 /// Returns true if the path exists, false if it was ignored.
63 bool AddPath(const Twine &Path, IncludeDirGroup Group, bool isFramework);
64
65 /// AddUnmappedPath - Add the specified path to the specified group list,
66 /// without performing any sysroot remapping.
67 /// Returns true if the path exists, false if it was ignored.
68 bool AddUnmappedPath(const Twine &Path, IncludeDirGroup Group,
69 bool isFramework);
70
71 /// AddSystemHeaderPrefix - Add the specified prefix to the system header
72 /// prefix list.
AddSystemHeaderPrefix(StringRef Prefix,bool IsSystemHeader)73 void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) {
74 SystemHeaderPrefixes.emplace_back(std::string(Prefix), IsSystemHeader);
75 }
76
77 /// AddGnuCPlusPlusIncludePaths - Add the necessary paths to support a gnu
78 /// libstdc++.
79 /// Returns true if the \p Base path was found, false if it does not exist.
80 bool AddGnuCPlusPlusIncludePaths(StringRef Base, StringRef ArchDir,
81 StringRef Dir32, StringRef Dir64,
82 const llvm::Triple &triple);
83
84 /// AddMinGWCPlusPlusIncludePaths - Add the necessary paths to support a MinGW
85 /// libstdc++.
86 void AddMinGWCPlusPlusIncludePaths(StringRef Base,
87 StringRef Arch,
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 LangOptions &LangOpts,
97 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
CanPrefixSysroot(StringRef Path)113 static 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
AddPath(const Twine & Path,IncludeDirGroup Group,bool isFramework)121 bool 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 return AddUnmappedPath(IncludeSysroot + Path, Group, isFramework);
130 }
131 }
132
133 return AddUnmappedPath(Path, Group, isFramework);
134 }
135
AddUnmappedPath(const Twine & Path,IncludeDirGroup Group,bool isFramework)136 bool 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 // If use system headers while cross-compiling, emit the warning.
145 if (HasSysroot && (MappedPathStr.startswith("/usr/include") ||
146 MappedPathStr.startswith("/usr/local/include"))) {
147 Headers.getDiags().Report(diag::warn_poison_system_directories)
148 << MappedPathStr;
149 }
150
151 // Compute the DirectoryLookup type.
152 SrcMgr::CharacteristicKind Type;
153 if (Group == Quoted || Group == Angled || Group == IndexHeaderMap) {
154 Type = SrcMgr::C_User;
155 } else if (Group == ExternCSystem) {
156 Type = SrcMgr::C_ExternCSystem;
157 } else {
158 Type = SrcMgr::C_System;
159 }
160
161 // If the directory exists, add it.
162 if (auto DE = FM.getOptionalDirectoryRef(MappedPathStr)) {
163 IncludePath.emplace_back(Group, DirectoryLookup(*DE, Type, isFramework));
164 return true;
165 }
166
167 // Check to see if this is an apple-style headermap (which are not allowed to
168 // be frameworks).
169 if (!isFramework) {
170 if (auto FE = FM.getFile(MappedPathStr)) {
171 if (const HeaderMap *HM = Headers.CreateHeaderMap(*FE)) {
172 // It is a headermap, add it to the search path.
173 IncludePath.emplace_back(
174 Group, DirectoryLookup(HM, Type, Group == IndexHeaderMap));
175 return true;
176 }
177 }
178 }
179
180 if (Verbose)
181 llvm::errs() << "ignoring nonexistent directory \""
182 << MappedPathStr << "\"\n";
183 return false;
184 }
185
AddGnuCPlusPlusIncludePaths(StringRef Base,StringRef ArchDir,StringRef Dir32,StringRef Dir64,const llvm::Triple & triple)186 bool InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base,
187 StringRef ArchDir,
188 StringRef Dir32,
189 StringRef Dir64,
190 const llvm::Triple &triple) {
191 // Add the base dir
192 bool IsBaseFound = AddPath(Base, CXXSystem, false);
193
194 // Add the multilib dirs
195 llvm::Triple::ArchType arch = triple.getArch();
196 bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64;
197 if (is64bit)
198 AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, false);
199 else
200 AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, false);
201
202 // Add the backward dir
203 AddPath(Base + "/backward", CXXSystem, false);
204 return IsBaseFound;
205 }
206
AddMinGWCPlusPlusIncludePaths(StringRef Base,StringRef Arch,StringRef Version)207 void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base,
208 StringRef Arch,
209 StringRef Version) {
210 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++",
211 CXXSystem, false);
212 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch,
213 CXXSystem, false);
214 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward",
215 CXXSystem, false);
216 }
217
AddDefaultCIncludePaths(const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)218 void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
219 const HeaderSearchOptions &HSOpts) {
220 llvm::Triple::OSType os = triple.getOS();
221
222 if (triple.isOSDarwin()) {
223 llvm_unreachable("Include management is handled in the driver.");
224 }
225
226 if (HSOpts.UseStandardSystemIncludes) {
227 switch (os) {
228 case llvm::Triple::CloudABI:
229 case llvm::Triple::FreeBSD:
230 case llvm::Triple::NetBSD:
231 case llvm::Triple::OpenBSD:
232 case llvm::Triple::NaCl:
233 case llvm::Triple::PS4:
234 case llvm::Triple::ELFIAMCU:
235 case llvm::Triple::Fuchsia:
236 break;
237 case llvm::Triple::Win32:
238 if (triple.getEnvironment() != llvm::Triple::Cygnus)
239 break;
240 LLVM_FALLTHROUGH;
241 default:
242 // FIXME: temporary hack: hard-coded paths.
243 AddPath("/usr/local/include", System, false);
244 break;
245 }
246 }
247
248 // Builtin includes use #include_next directives and should be positioned
249 // just prior C include dirs.
250 if (HSOpts.UseBuiltinIncludes) {
251 // Ignore the sys root, we *always* look for clang headers relative to
252 // supplied path.
253 SmallString<128> P = StringRef(HSOpts.ResourceDir);
254 llvm::sys::path::append(P, "include");
255 AddUnmappedPath(P, ExternCSystem, false);
256 }
257
258 // All remaining additions are for system include directories, early exit if
259 // we aren't using them.
260 if (!HSOpts.UseStandardSystemIncludes)
261 return;
262
263 // Add dirs specified via 'configure --with-c-include-dirs'.
264 StringRef CIncludeDirs(C_INCLUDE_DIRS);
265 if (CIncludeDirs != "") {
266 SmallVector<StringRef, 5> dirs;
267 CIncludeDirs.split(dirs, ":");
268 for (StringRef dir : dirs)
269 AddPath(dir, ExternCSystem, false);
270 return;
271 }
272
273 switch (os) {
274 case llvm::Triple::Linux:
275 case llvm::Triple::Hurd:
276 case llvm::Triple::Solaris:
277 case llvm::Triple::OpenBSD:
278 llvm_unreachable("Include management is handled in the driver.");
279
280 case llvm::Triple::CloudABI: {
281 // <sysroot>/<triple>/include
282 SmallString<128> P = StringRef(HSOpts.ResourceDir);
283 llvm::sys::path::append(P, "../../..", triple.str(), "include");
284 AddPath(P, System, false);
285 break;
286 }
287
288 case llvm::Triple::Haiku:
289 AddPath("/boot/system/non-packaged/develop/headers", System, false);
290 AddPath("/boot/system/develop/headers/os", System, false);
291 AddPath("/boot/system/develop/headers/os/app", System, false);
292 AddPath("/boot/system/develop/headers/os/arch", System, false);
293 AddPath("/boot/system/develop/headers/os/device", System, false);
294 AddPath("/boot/system/develop/headers/os/drivers", System, false);
295 AddPath("/boot/system/develop/headers/os/game", System, false);
296 AddPath("/boot/system/develop/headers/os/interface", System, false);
297 AddPath("/boot/system/develop/headers/os/kernel", System, false);
298 AddPath("/boot/system/develop/headers/os/locale", System, false);
299 AddPath("/boot/system/develop/headers/os/mail", System, false);
300 AddPath("/boot/system/develop/headers/os/media", System, false);
301 AddPath("/boot/system/develop/headers/os/midi", System, false);
302 AddPath("/boot/system/develop/headers/os/midi2", System, false);
303 AddPath("/boot/system/develop/headers/os/net", System, false);
304 AddPath("/boot/system/develop/headers/os/opengl", System, false);
305 AddPath("/boot/system/develop/headers/os/storage", System, false);
306 AddPath("/boot/system/develop/headers/os/support", System, false);
307 AddPath("/boot/system/develop/headers/os/translation", System, false);
308 AddPath("/boot/system/develop/headers/os/add-ons/graphics", System, false);
309 AddPath("/boot/system/develop/headers/os/add-ons/input_server", System, false);
310 AddPath("/boot/system/develop/headers/os/add-ons/mail_daemon", System, false);
311 AddPath("/boot/system/develop/headers/os/add-ons/registrar", System, false);
312 AddPath("/boot/system/develop/headers/os/add-ons/screen_saver", System, false);
313 AddPath("/boot/system/develop/headers/os/add-ons/tracker", System, false);
314 AddPath("/boot/system/develop/headers/os/be_apps/Deskbar", System, false);
315 AddPath("/boot/system/develop/headers/os/be_apps/NetPositive", System, false);
316 AddPath("/boot/system/develop/headers/os/be_apps/Tracker", System, false);
317 AddPath("/boot/system/develop/headers/3rdparty", System, false);
318 AddPath("/boot/system/develop/headers/bsd", System, false);
319 AddPath("/boot/system/develop/headers/glibc", System, false);
320 AddPath("/boot/system/develop/headers/posix", System, false);
321 AddPath("/boot/system/develop/headers", System, false);
322 break;
323 case llvm::Triple::RTEMS:
324 break;
325 case llvm::Triple::Win32:
326 switch (triple.getEnvironment()) {
327 default: llvm_unreachable("Include management is handled in the driver.");
328 case llvm::Triple::Cygnus:
329 AddPath("/usr/include/w32api", System, false);
330 break;
331 case llvm::Triple::GNU:
332 break;
333 }
334 break;
335 default:
336 break;
337 }
338
339 switch (os) {
340 case llvm::Triple::CloudABI:
341 case llvm::Triple::RTEMS:
342 case llvm::Triple::NaCl:
343 case llvm::Triple::ELFIAMCU:
344 case llvm::Triple::Fuchsia:
345 break;
346 case llvm::Triple::PS4: {
347 // <isysroot> gets prepended later in AddPath().
348 std::string BaseSDKPath = "";
349 if (!HasSysroot) {
350 const char *envValue = getenv("SCE_ORBIS_SDK_DIR");
351 if (envValue)
352 BaseSDKPath = envValue;
353 else {
354 // HSOpts.ResourceDir variable contains the location of Clang's
355 // resource files.
356 // Assuming that Clang is configured for PS4 without
357 // --with-clang-resource-dir option, the location of Clang's resource
358 // files is <SDK_DIR>/host_tools/lib/clang
359 SmallString<128> P = StringRef(HSOpts.ResourceDir);
360 llvm::sys::path::append(P, "../../..");
361 BaseSDKPath = std::string(P.str());
362 }
363 }
364 AddPath(BaseSDKPath + "/target/include", System, false);
365 if (triple.isPS4CPU())
366 AddPath(BaseSDKPath + "/target/include_common", System, false);
367 LLVM_FALLTHROUGH;
368 }
369 default:
370 AddPath("/usr/include", ExternCSystem, false);
371 break;
372 }
373 }
374
AddDefaultCPlusPlusIncludePaths(const LangOptions & LangOpts,const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)375 void InitHeaderSearch::AddDefaultCPlusPlusIncludePaths(
376 const LangOptions &LangOpts, const llvm::Triple &triple,
377 const HeaderSearchOptions &HSOpts) {
378 llvm::Triple::OSType os = triple.getOS();
379 // FIXME: temporary hack: hard-coded paths.
380
381 if (triple.isOSDarwin()) {
382 llvm_unreachable("Include management is handled in the driver.");
383 }
384
385 switch (os) {
386 case llvm::Triple::Linux:
387 case llvm::Triple::Hurd:
388 case llvm::Triple::Solaris:
389 case llvm::Triple::AIX:
390 llvm_unreachable("Include management is handled in the driver.");
391 break;
392 case llvm::Triple::Win32:
393 switch (triple.getEnvironment()) {
394 default: llvm_unreachable("Include management is handled in the driver.");
395 case llvm::Triple::Cygnus:
396 // Cygwin-1.7
397 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.7.3");
398 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
399 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
400 // g++-4 / Cygwin-1.5
401 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
402 break;
403 }
404 break;
405 case llvm::Triple::DragonFly:
406 AddPath("/usr/include/c++/8.0", CXXSystem, false);
407 break;
408 case llvm::Triple::Minix:
409 AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
410 "", "", "", triple);
411 break;
412 default:
413 break;
414 }
415 }
416
AddDefaultIncludePaths(const LangOptions & Lang,const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)417 void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang,
418 const llvm::Triple &triple,
419 const HeaderSearchOptions &HSOpts) {
420 // NB: This code path is going away. All of the logic is moving into the
421 // driver which has the information necessary to do target-specific
422 // selections of default include paths. Each target which moves there will be
423 // exempted from this logic here until we can delete the entire pile of code.
424 switch (triple.getOS()) {
425 default:
426 break; // Everything else continues to use this routine's logic.
427
428 case llvm::Triple::Emscripten:
429 case llvm::Triple::Linux:
430 case llvm::Triple::Hurd:
431 case llvm::Triple::OpenBSD:
432 case llvm::Triple::Solaris:
433 case llvm::Triple::WASI:
434 case llvm::Triple::AIX:
435 return;
436
437 case llvm::Triple::Win32:
438 if (triple.getEnvironment() != llvm::Triple::Cygnus ||
439 triple.isOSBinFormatMachO())
440 return;
441 break;
442
443 case llvm::Triple::UnknownOS:
444 if (triple.isWasm())
445 return;
446 break;
447 }
448
449 // All header search logic is handled in the Driver for Darwin.
450 if (triple.isOSDarwin()) {
451 if (HSOpts.UseStandardSystemIncludes) {
452 // Add the default framework include paths on Darwin.
453 AddPath("/System/Library/Frameworks", System, true);
454 AddPath("/Library/Frameworks", System, true);
455 }
456 return;
457 }
458
459 if (Lang.CPlusPlus && !Lang.AsmPreprocessor &&
460 HSOpts.UseStandardCXXIncludes && HSOpts.UseStandardSystemIncludes) {
461 if (HSOpts.UseLibcxx) {
462 AddPath("/usr/include/c++/v1", CXXSystem, false);
463 } else {
464 AddDefaultCPlusPlusIncludePaths(Lang, triple, HSOpts);
465 }
466 }
467
468 AddDefaultCIncludePaths(triple, HSOpts);
469 }
470
471 /// RemoveDuplicates - If there are duplicate directory entries in the specified
472 /// search list, remove the later (dead) ones. Returns the number of non-system
473 /// headers removed, which is used to update NumAngled.
RemoveDuplicates(std::vector<DirectoryLookup> & SearchList,unsigned First,bool Verbose)474 static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList,
475 unsigned First, bool Verbose) {
476 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs;
477 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs;
478 llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps;
479 unsigned NonSystemRemoved = 0;
480 for (unsigned i = First; i != SearchList.size(); ++i) {
481 unsigned DirToRemove = i;
482
483 const DirectoryLookup &CurEntry = SearchList[i];
484
485 if (CurEntry.isNormalDir()) {
486 // If this isn't the first time we've seen this dir, remove it.
487 if (SeenDirs.insert(CurEntry.getDir()).second)
488 continue;
489 } else if (CurEntry.isFramework()) {
490 // If this isn't the first time we've seen this framework dir, remove it.
491 if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second)
492 continue;
493 } else {
494 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
495 // If this isn't the first time we've seen this headermap, remove it.
496 if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second)
497 continue;
498 }
499
500 // If we have a normal #include dir/framework/headermap that is shadowed
501 // later in the chain by a system include location, we actually want to
502 // ignore the user's request and drop the user dir... keeping the system
503 // dir. This is weird, but required to emulate GCC's search path correctly.
504 //
505 // Since dupes of system dirs are rare, just rescan to find the original
506 // that we're nuking instead of using a DenseMap.
507 if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) {
508 // Find the dir that this is the same of.
509 unsigned FirstDir;
510 for (FirstDir = First;; ++FirstDir) {
511 assert(FirstDir != i && "Didn't find dupe?");
512
513 const DirectoryLookup &SearchEntry = SearchList[FirstDir];
514
515 // If these are different lookup types, then they can't be the dupe.
516 if (SearchEntry.getLookupType() != CurEntry.getLookupType())
517 continue;
518
519 bool isSame;
520 if (CurEntry.isNormalDir())
521 isSame = SearchEntry.getDir() == CurEntry.getDir();
522 else if (CurEntry.isFramework())
523 isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir();
524 else {
525 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
526 isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap();
527 }
528
529 if (isSame)
530 break;
531 }
532
533 // If the first dir in the search path is a non-system dir, zap it
534 // instead of the system one.
535 if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User)
536 DirToRemove = FirstDir;
537 }
538
539 if (Verbose) {
540 llvm::errs() << "ignoring duplicate directory \""
541 << CurEntry.getName() << "\"\n";
542 if (DirToRemove != i)
543 llvm::errs() << " as it is a non-system directory that duplicates "
544 << "a system directory\n";
545 }
546 if (DirToRemove != i)
547 ++NonSystemRemoved;
548
549 // This is reached if the current entry is a duplicate. Remove the
550 // DirToRemove (usually the current dir).
551 SearchList.erase(SearchList.begin()+DirToRemove);
552 --i;
553 }
554 return NonSystemRemoved;
555 }
556
557
Realize(const LangOptions & Lang)558 void InitHeaderSearch::Realize(const LangOptions &Lang) {
559 // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
560 std::vector<DirectoryLookup> SearchList;
561 SearchList.reserve(IncludePath.size());
562
563 // Quoted arguments go first.
564 for (auto &Include : IncludePath)
565 if (Include.Group == Quoted)
566 SearchList.push_back(Include.Lookup);
567
568 // Deduplicate and remember index.
569 RemoveDuplicates(SearchList, 0, Verbose);
570 unsigned NumQuoted = SearchList.size();
571
572 for (auto &Include : IncludePath)
573 if (Include.Group == Angled || Include.Group == IndexHeaderMap)
574 SearchList.push_back(Include.Lookup);
575
576 RemoveDuplicates(SearchList, NumQuoted, Verbose);
577 unsigned NumAngled = SearchList.size();
578
579 for (auto &Include : IncludePath)
580 if (Include.Group == System || Include.Group == ExternCSystem ||
581 (!Lang.ObjC && !Lang.CPlusPlus && Include.Group == CSystem) ||
582 (/*FIXME !Lang.ObjC && */ Lang.CPlusPlus &&
583 Include.Group == CXXSystem) ||
584 (Lang.ObjC && !Lang.CPlusPlus && Include.Group == ObjCSystem) ||
585 (Lang.ObjC && Lang.CPlusPlus && Include.Group == ObjCXXSystem))
586 SearchList.push_back(Include.Lookup);
587
588 for (auto &Include : IncludePath)
589 if (Include.Group == After)
590 SearchList.push_back(Include.Lookup);
591
592 // Remove duplicates across both the Angled and System directories. GCC does
593 // this and failing to remove duplicates across these two groups breaks
594 // #include_next.
595 unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose);
596 NumAngled -= NonSystemRemoved;
597
598 bool DontSearchCurDir = false; // TODO: set to true if -I- is set?
599 Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir);
600
601 Headers.SetSystemHeaderPrefixes(SystemHeaderPrefixes);
602
603 // If verbose, print the list of directories that will be searched.
604 if (Verbose) {
605 llvm::errs() << "#include \"...\" search starts here:\n";
606 for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
607 if (i == NumQuoted)
608 llvm::errs() << "#include <...> search starts here:\n";
609 StringRef Name = SearchList[i].getName();
610 const char *Suffix;
611 if (SearchList[i].isNormalDir())
612 Suffix = "";
613 else if (SearchList[i].isFramework())
614 Suffix = " (framework directory)";
615 else {
616 assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup");
617 Suffix = " (headermap)";
618 }
619 llvm::errs() << " " << Name << Suffix << "\n";
620 }
621 llvm::errs() << "End of search list.\n";
622 }
623 }
624
ApplyHeaderSearchOptions(HeaderSearch & HS,const HeaderSearchOptions & HSOpts,const LangOptions & Lang,const llvm::Triple & Triple)625 void clang::ApplyHeaderSearchOptions(HeaderSearch &HS,
626 const HeaderSearchOptions &HSOpts,
627 const LangOptions &Lang,
628 const llvm::Triple &Triple) {
629 InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot);
630
631 // Add the user defined entries.
632 for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) {
633 const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i];
634 if (E.IgnoreSysRoot) {
635 Init.AddUnmappedPath(E.Path, E.Group, E.IsFramework);
636 } else {
637 Init.AddPath(E.Path, E.Group, E.IsFramework);
638 }
639 }
640
641 Init.AddDefaultIncludePaths(Lang, Triple, HSOpts);
642
643 for (unsigned i = 0, e = HSOpts.SystemHeaderPrefixes.size(); i != e; ++i)
644 Init.AddSystemHeaderPrefix(HSOpts.SystemHeaderPrefixes[i].Prefix,
645 HSOpts.SystemHeaderPrefixes[i].IsSystemHeader);
646
647 if (HSOpts.UseBuiltinIncludes) {
648 // Set up the builtin include directory in the module map.
649 SmallString<128> P = StringRef(HSOpts.ResourceDir);
650 llvm::sys::path::append(P, "include");
651 if (auto Dir = HS.getFileMgr().getDirectory(P))
652 HS.getModuleMap().setBuiltinIncludeDir(*Dir);
653 }
654
655 Init.Realize(Lang);
656 }
657