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/Frontend/HeaderSearchOptions.h"
18 #include "clang/Lex/HeaderSearch.h"
19 #include "llvm/ADT/SmallString.h"
20 #include "llvm/ADT/SmallPtrSet.h"
21 #include "llvm/ADT/SmallVector.h"
22 #include "llvm/ADT/StringExtras.h"
23 #include "llvm/ADT/Triple.h"
24 #include "llvm/ADT/Twine.h"
25 #include "llvm/Support/raw_ostream.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/Support/Path.h"
28
29 #include "clang/Config/config.h" // C_INCLUDE_DIRS
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 HeaderSearch &Headers;
44 bool Verbose;
45 std::string IncludeSysroot;
46 bool IsNotEmptyOrRoot;
47
48 public:
49
InitHeaderSearch(HeaderSearch & HS,bool verbose,StringRef sysroot)50 InitHeaderSearch(HeaderSearch &HS, bool verbose, StringRef sysroot)
51 : Headers(HS), Verbose(verbose), IncludeSysroot(sysroot),
52 IsNotEmptyOrRoot(!(sysroot.empty() || sysroot == "/")) {
53 }
54
55 /// AddPath - Add the specified path to the specified group list.
56 void AddPath(const Twine &Path, IncludeDirGroup Group,
57 bool isCXXAware, bool isUserSupplied,
58 bool isFramework, bool IgnoreSysRoot = false);
59
60 /// AddGnuCPlusPlusIncludePaths - Add the necessary paths to support a gnu
61 /// libstdc++.
62 void AddGnuCPlusPlusIncludePaths(StringRef Base,
63 StringRef ArchDir,
64 StringRef Dir32,
65 StringRef Dir64,
66 const llvm::Triple &triple);
67
68 /// AddMinGWCPlusPlusIncludePaths - Add the necessary paths to support a MinGW
69 /// libstdc++.
70 void AddMinGWCPlusPlusIncludePaths(StringRef Base,
71 StringRef Arch,
72 StringRef Version);
73
74 /// AddMinGW64CXXPaths - Add the necessary paths to support
75 /// libstdc++ of x86_64-w64-mingw32 aka mingw-w64.
76 void AddMinGW64CXXPaths(StringRef Base,
77 StringRef Version);
78
79 // AddDefaultCIncludePaths - Add paths that should always be searched.
80 void AddDefaultCIncludePaths(const llvm::Triple &triple,
81 const HeaderSearchOptions &HSOpts);
82
83 // AddDefaultCPlusPlusIncludePaths - Add paths that should be searched when
84 // compiling c++.
85 void AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple,
86 const HeaderSearchOptions &HSOpts);
87
88 /// AddDefaultSystemIncludePaths - Adds the default system include paths so
89 /// that e.g. stdio.h is found.
90 void AddDefaultIncludePaths(const LangOptions &Lang,
91 const llvm::Triple &triple,
92 const HeaderSearchOptions &HSOpts);
93
94 /// Realize - Merges all search path lists into one list and send it to
95 /// HeaderSearch.
96 void Realize(const LangOptions &Lang);
97 };
98
99 } // end anonymous namespace.
100
AddPath(const Twine & Path,IncludeDirGroup Group,bool isCXXAware,bool isUserSupplied,bool isFramework,bool IgnoreSysRoot)101 void InitHeaderSearch::AddPath(const Twine &Path,
102 IncludeDirGroup Group, bool isCXXAware,
103 bool isUserSupplied, bool isFramework,
104 bool IgnoreSysRoot) {
105 assert(!Path.isTriviallyEmpty() && "can't handle empty path here");
106 FileManager &FM = Headers.getFileMgr();
107
108 // Compute the actual path, taking into consideration -isysroot.
109 SmallString<256> MappedPathStorage;
110 StringRef MappedPathStr = Path.toStringRef(MappedPathStorage);
111
112 // Handle isysroot.
113 if ((Group == System || Group == CXXSystem) && !IgnoreSysRoot &&
114 #if defined(_WIN32)
115 !MappedPathStr.empty() &&
116 llvm::sys::path::is_separator(MappedPathStr[0]) &&
117 #else
118 llvm::sys::path::is_absolute(MappedPathStr) &&
119 #endif
120 IsNotEmptyOrRoot) {
121 MappedPathStorage.clear();
122 MappedPathStr =
123 (IncludeSysroot + Path).toStringRef(MappedPathStorage);
124 }
125
126 // Compute the DirectoryLookup type.
127 SrcMgr::CharacteristicKind Type;
128 if (Group == Quoted || Group == Angled || Group == IndexHeaderMap)
129 Type = SrcMgr::C_User;
130 else if (isCXXAware)
131 Type = SrcMgr::C_System;
132 else
133 Type = SrcMgr::C_ExternCSystem;
134
135
136 // If the directory exists, add it.
137 if (const DirectoryEntry *DE = FM.getDirectory(MappedPathStr)) {
138 IncludePath.push_back(std::make_pair(Group, DirectoryLookup(DE, Type,
139 isUserSupplied, isFramework)));
140 return;
141 }
142
143 // Check to see if this is an apple-style headermap (which are not allowed to
144 // be frameworks).
145 if (!isFramework) {
146 if (const FileEntry *FE = FM.getFile(MappedPathStr)) {
147 if (const HeaderMap *HM = Headers.CreateHeaderMap(FE)) {
148 // It is a headermap, add it to the search path.
149 IncludePath.push_back(std::make_pair(Group, DirectoryLookup(HM, Type,
150 isUserSupplied, Group == IndexHeaderMap)));
151 return;
152 }
153 }
154 }
155
156 if (Verbose)
157 llvm::errs() << "ignoring nonexistent directory \""
158 << MappedPathStr << "\"\n";
159 }
160
AddGnuCPlusPlusIncludePaths(StringRef Base,StringRef ArchDir,StringRef Dir32,StringRef Dir64,const llvm::Triple & triple)161 void InitHeaderSearch::AddGnuCPlusPlusIncludePaths(StringRef Base,
162 StringRef ArchDir,
163 StringRef Dir32,
164 StringRef Dir64,
165 const llvm::Triple &triple) {
166 // Add the base dir
167 AddPath(Base, CXXSystem, true, false, false);
168
169 // Add the multilib dirs
170 llvm::Triple::ArchType arch = triple.getArch();
171 bool is64bit = arch == llvm::Triple::ppc64 || arch == llvm::Triple::x86_64;
172 if (is64bit)
173 AddPath(Base + "/" + ArchDir + "/" + Dir64, CXXSystem, true, false, false);
174 else
175 AddPath(Base + "/" + ArchDir + "/" + Dir32, CXXSystem, true, false, false);
176
177 // Add the backward dir
178 AddPath(Base + "/backward", CXXSystem, true, false, false);
179 }
180
AddMinGWCPlusPlusIncludePaths(StringRef Base,StringRef Arch,StringRef Version)181 void InitHeaderSearch::AddMinGWCPlusPlusIncludePaths(StringRef Base,
182 StringRef Arch,
183 StringRef Version) {
184 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++",
185 CXXSystem, true, false, false);
186 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/" + Arch,
187 CXXSystem, true, false, false);
188 AddPath(Base + "/" + Arch + "/" + Version + "/include/c++/backward",
189 CXXSystem, true, false, false);
190 }
191
AddMinGW64CXXPaths(StringRef Base,StringRef Version)192 void InitHeaderSearch::AddMinGW64CXXPaths(StringRef Base,
193 StringRef Version) {
194 // Assumes Base is HeaderSearchOpts' ResourceDir
195 AddPath(Base + "/../../../include/c++/" + Version,
196 CXXSystem, true, false, false);
197 AddPath(Base + "/../../../include/c++/" + Version + "/x86_64-w64-mingw32",
198 CXXSystem, true, false, false);
199 AddPath(Base + "/../../../include/c++/" + Version + "/i686-w64-mingw32",
200 CXXSystem, true, false, false);
201 AddPath(Base + "/../../../include/c++/" + Version + "/backward",
202 CXXSystem, true, false, false);
203 }
204
AddDefaultCIncludePaths(const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)205 void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
206 const HeaderSearchOptions &HSOpts) {
207 llvm::Triple::OSType os = triple.getOS();
208
209 if (HSOpts.UseStandardSystemIncludes) {
210 switch (os) {
211 case llvm::Triple::FreeBSD:
212 case llvm::Triple::NetBSD:
213 break;
214 default:
215 // FIXME: temporary hack: hard-coded paths.
216 AddPath("/usr/local/include", System, true, false, false);
217 break;
218 }
219 }
220
221 // Builtin includes use #include_next directives and should be positioned
222 // just prior C include dirs.
223 if (HSOpts.UseBuiltinIncludes) {
224 // Ignore the sys root, we *always* look for clang headers relative to
225 // supplied path.
226 llvm::sys::Path P(HSOpts.ResourceDir);
227 P.appendComponent("include");
228 AddPath(P.str(), System, false, false, false, /*IgnoreSysRoot=*/ true);
229 }
230
231 // All remaining additions are for system include directories, early exit if
232 // we aren't using them.
233 if (!HSOpts.UseStandardSystemIncludes)
234 return;
235
236 // Add dirs specified via 'configure --with-c-include-dirs'.
237 StringRef CIncludeDirs(C_INCLUDE_DIRS);
238 if (CIncludeDirs != "") {
239 SmallVector<StringRef, 5> dirs;
240 CIncludeDirs.split(dirs, ":");
241 for (SmallVectorImpl<StringRef>::iterator i = dirs.begin();
242 i != dirs.end();
243 ++i)
244 AddPath(*i, System, false, false, false);
245 return;
246 }
247
248 switch (os) {
249 case llvm::Triple::Linux:
250 case llvm::Triple::Win32:
251 llvm_unreachable("Include management is handled in the driver.");
252
253 case llvm::Triple::Haiku:
254 AddPath("/boot/common/include", System, true, false, false);
255 AddPath("/boot/develop/headers/os", System, true, false, false);
256 AddPath("/boot/develop/headers/os/app", System, true, false, false);
257 AddPath("/boot/develop/headers/os/arch", System, true, false, false);
258 AddPath("/boot/develop/headers/os/device", System, true, false, false);
259 AddPath("/boot/develop/headers/os/drivers", System, true, false, false);
260 AddPath("/boot/develop/headers/os/game", System, true, false, false);
261 AddPath("/boot/develop/headers/os/interface", System, true, false, false);
262 AddPath("/boot/develop/headers/os/kernel", System, true, false, false);
263 AddPath("/boot/develop/headers/os/locale", System, true, false, false);
264 AddPath("/boot/develop/headers/os/mail", System, true, false, false);
265 AddPath("/boot/develop/headers/os/media", System, true, false, false);
266 AddPath("/boot/develop/headers/os/midi", System, true, false, false);
267 AddPath("/boot/develop/headers/os/midi2", System, true, false, false);
268 AddPath("/boot/develop/headers/os/net", System, true, false, false);
269 AddPath("/boot/develop/headers/os/storage", System, true, false, false);
270 AddPath("/boot/develop/headers/os/support", System, true, false, false);
271 AddPath("/boot/develop/headers/os/translation",
272 System, true, false, false);
273 AddPath("/boot/develop/headers/os/add-ons/graphics",
274 System, true, false, false);
275 AddPath("/boot/develop/headers/os/add-ons/input_server",
276 System, true, false, false);
277 AddPath("/boot/develop/headers/os/add-ons/screen_saver",
278 System, true, false, false);
279 AddPath("/boot/develop/headers/os/add-ons/tracker",
280 System, true, false, false);
281 AddPath("/boot/develop/headers/os/be_apps/Deskbar",
282 System, true, false, false);
283 AddPath("/boot/develop/headers/os/be_apps/NetPositive",
284 System, true, false, false);
285 AddPath("/boot/develop/headers/os/be_apps/Tracker",
286 System, true, false, false);
287 AddPath("/boot/develop/headers/cpp", System, true, false, false);
288 AddPath("/boot/develop/headers/cpp/i586-pc-haiku",
289 System, true, false, false);
290 AddPath("/boot/develop/headers/3rdparty", System, true, false, false);
291 AddPath("/boot/develop/headers/bsd", System, true, false, false);
292 AddPath("/boot/develop/headers/glibc", System, true, false, false);
293 AddPath("/boot/develop/headers/posix", System, true, false, false);
294 AddPath("/boot/develop/headers", System, true, false, false);
295 break;
296 case llvm::Triple::RTEMS:
297 break;
298 case llvm::Triple::Cygwin:
299 AddPath("/usr/include/w32api", System, true, false, false);
300 break;
301 case llvm::Triple::MinGW32: {
302 // mingw-w64 crt include paths
303 llvm::sys::Path P(HSOpts.ResourceDir);
304 P.appendComponent("../../../i686-w64-mingw32/include"); // <sysroot>/i686-w64-mingw32/include
305 AddPath(P.str(), System, true, false, false);
306 P = llvm::sys::Path(HSOpts.ResourceDir);
307 P.appendComponent("../../../x86_64-w64-mingw32/include"); // <sysroot>/x86_64-w64-mingw32/include
308 AddPath(P.str(), System, true, false, false);
309 // mingw.org crt include paths
310 P = llvm::sys::Path(HSOpts.ResourceDir);
311 P.appendComponent("../../../include"); // <sysroot>/include
312 AddPath(P.str(), System, true, false, false);
313 AddPath("/mingw/include", System, true, false, false);
314 AddPath("c:/mingw/include", System, true, false, false);
315 }
316 break;
317
318 default:
319 break;
320 }
321
322 if ( os != llvm::Triple::RTEMS )
323 AddPath("/usr/include", System, false, false, false);
324 }
325
326 void InitHeaderSearch::
AddDefaultCPlusPlusIncludePaths(const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)327 AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) {
328 llvm::Triple::OSType os = triple.getOS();
329 // FIXME: temporary hack: hard-coded paths.
330
331 if (triple.isOSDarwin()) {
332 switch (triple.getArch()) {
333 default: break;
334
335 case llvm::Triple::ppc:
336 case llvm::Triple::ppc64:
337 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
338 "powerpc-apple-darwin10", "", "ppc64",
339 triple);
340 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
341 "powerpc-apple-darwin10", "", "ppc64",
342 triple);
343 break;
344
345 case llvm::Triple::x86:
346 case llvm::Triple::x86_64:
347 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
348 "i686-apple-darwin10", "", "x86_64", triple);
349 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
350 "i686-apple-darwin8", "", "", triple);
351 break;
352
353 case llvm::Triple::arm:
354 case llvm::Triple::thumb:
355 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
356 "arm-apple-darwin10", "v7", "", triple);
357 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
358 "arm-apple-darwin10", "v6", "", triple);
359 break;
360 }
361 return;
362 }
363
364 switch (os) {
365 case llvm::Triple::Linux:
366 case llvm::Triple::Win32:
367 llvm_unreachable("Include management is handled in the driver.");
368
369 case llvm::Triple::Cygwin:
370 // Cygwin-1.7
371 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
372 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
373 // g++-4 / Cygwin-1.5
374 AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
375 break;
376 case llvm::Triple::MinGW32:
377 // mingw-w64 C++ include paths (i686-w64-mingw32 and x86_64-w64-mingw32)
378 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.0");
379 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.1");
380 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.2");
381 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.3");
382 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.4");
383 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.0");
384 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.1");
385 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.2");
386 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.3");
387 AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.0");
388 // mingw.org C++ include paths
389 AddMinGWCPlusPlusIncludePaths("/mingw/lib/gcc", "mingw32", "4.5.2"); //MSYS
390 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.6.2");
391 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.6.1");
392 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.2");
393 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.0");
394 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.4.0");
395 AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.3.0");
396 break;
397 case llvm::Triple::DragonFly:
398 AddPath("/usr/include/c++/4.1", CXXSystem, true, false, false);
399 break;
400 case llvm::Triple::FreeBSD:
401 // FreeBSD 8.0
402 // FreeBSD 7.3
403 AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2", "", "", "", triple);
404 break;
405 case llvm::Triple::NetBSD:
406 AddGnuCPlusPlusIncludePaths("/usr/include/g++", "", "", "", triple);
407 break;
408 case llvm::Triple::OpenBSD: {
409 std::string t = triple.getTriple();
410 if (t.substr(0, 6) == "x86_64")
411 t.replace(0, 6, "amd64");
412 AddGnuCPlusPlusIncludePaths("/usr/include/g++",
413 t, "", "", triple);
414 break;
415 }
416 case llvm::Triple::Minix:
417 AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
418 "", "", "", triple);
419 break;
420 case llvm::Triple::Solaris:
421 AddGnuCPlusPlusIncludePaths("/usr/gcc/4.5/include/c++/4.5.2/",
422 "i386-pc-solaris2.11", "", "", triple);
423 // Solaris - Fall though..
424 case llvm::Triple::AuroraUX:
425 // AuroraUX
426 AddGnuCPlusPlusIncludePaths("/opt/gcc4/include/c++/4.2.4",
427 "i386-pc-solaris2.11", "", "", triple);
428 break;
429 default:
430 break;
431 }
432 }
433
AddDefaultIncludePaths(const LangOptions & Lang,const llvm::Triple & triple,const HeaderSearchOptions & HSOpts)434 void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang,
435 const llvm::Triple &triple,
436 const HeaderSearchOptions &HSOpts) {
437 // NB: This code path is going away. All of the logic is moving into the
438 // driver which has the information necessary to do target-specific
439 // selections of default include paths. Each target which moves there will be
440 // exempted from this logic here until we can delete the entire pile of code.
441 switch (triple.getOS()) {
442 default:
443 break; // Everything else continues to use this routine's logic.
444
445 case llvm::Triple::Linux:
446 case llvm::Triple::Win32:
447 return;
448 }
449
450 if (Lang.CPlusPlus && HSOpts.UseStandardCXXIncludes &&
451 HSOpts.UseStandardSystemIncludes) {
452 if (HSOpts.UseLibcxx) {
453 if (triple.isOSDarwin()) {
454 // On Darwin, libc++ may be installed alongside the compiler in
455 // lib/c++/v1.
456 llvm::sys::Path P(HSOpts.ResourceDir);
457 if (!P.isEmpty()) {
458 P.eraseComponent(); // Remove version from foo/lib/clang/version
459 P.eraseComponent(); // Remove clang from foo/lib/clang
460
461 // Get foo/lib/c++/v1
462 P.appendComponent("c++");
463 P.appendComponent("v1");
464 AddPath(P.str(), CXXSystem, true, false, false, true);
465 }
466 }
467 // On Solaris, include the support directory for things like xlocale and
468 // fudged system headers.
469 if (triple.getOS() == llvm::Triple::Solaris)
470 AddPath("/usr/include/c++/v1/support/solaris", CXXSystem, true, false,
471 false);
472
473 AddPath("/usr/include/c++/v1", CXXSystem, true, false, false);
474 } else {
475 AddDefaultCPlusPlusIncludePaths(triple, HSOpts);
476 }
477 }
478
479 AddDefaultCIncludePaths(triple, HSOpts);
480
481 // Add the default framework include paths on Darwin.
482 if (HSOpts.UseStandardSystemIncludes) {
483 if (triple.isOSDarwin()) {
484 AddPath("/System/Library/Frameworks", System, true, false, true);
485 AddPath("/Library/Frameworks", System, true, false, true);
486 }
487 }
488 }
489
490 /// RemoveDuplicates - If there are duplicate directory entries in the specified
491 /// search list, remove the later (dead) ones. Returns the number of non-system
492 /// headers removed, which is used to update NumAngled.
RemoveDuplicates(std::vector<DirectoryLookup> & SearchList,unsigned First,bool Verbose)493 static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList,
494 unsigned First, bool Verbose) {
495 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenDirs;
496 llvm::SmallPtrSet<const DirectoryEntry *, 8> SeenFrameworkDirs;
497 llvm::SmallPtrSet<const HeaderMap *, 8> SeenHeaderMaps;
498 unsigned NonSystemRemoved = 0;
499 for (unsigned i = First; i != SearchList.size(); ++i) {
500 unsigned DirToRemove = i;
501
502 const DirectoryLookup &CurEntry = SearchList[i];
503
504 if (CurEntry.isNormalDir()) {
505 // If this isn't the first time we've seen this dir, remove it.
506 if (SeenDirs.insert(CurEntry.getDir()))
507 continue;
508 } else if (CurEntry.isFramework()) {
509 // If this isn't the first time we've seen this framework dir, remove it.
510 if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()))
511 continue;
512 } else {
513 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
514 // If this isn't the first time we've seen this headermap, remove it.
515 if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()))
516 continue;
517 }
518
519 // If we have a normal #include dir/framework/headermap that is shadowed
520 // later in the chain by a system include location, we actually want to
521 // ignore the user's request and drop the user dir... keeping the system
522 // dir. This is weird, but required to emulate GCC's search path correctly.
523 //
524 // Since dupes of system dirs are rare, just rescan to find the original
525 // that we're nuking instead of using a DenseMap.
526 if (CurEntry.getDirCharacteristic() != SrcMgr::C_User) {
527 // Find the dir that this is the same of.
528 unsigned FirstDir;
529 for (FirstDir = 0; ; ++FirstDir) {
530 assert(FirstDir != i && "Didn't find dupe?");
531
532 const DirectoryLookup &SearchEntry = SearchList[FirstDir];
533
534 // If these are different lookup types, then they can't be the dupe.
535 if (SearchEntry.getLookupType() != CurEntry.getLookupType())
536 continue;
537
538 bool isSame;
539 if (CurEntry.isNormalDir())
540 isSame = SearchEntry.getDir() == CurEntry.getDir();
541 else if (CurEntry.isFramework())
542 isSame = SearchEntry.getFrameworkDir() == CurEntry.getFrameworkDir();
543 else {
544 assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
545 isSame = SearchEntry.getHeaderMap() == CurEntry.getHeaderMap();
546 }
547
548 if (isSame)
549 break;
550 }
551
552 // If the first dir in the search path is a non-system dir, zap it
553 // instead of the system one.
554 if (SearchList[FirstDir].getDirCharacteristic() == SrcMgr::C_User)
555 DirToRemove = FirstDir;
556 }
557
558 if (Verbose) {
559 llvm::errs() << "ignoring duplicate directory \""
560 << CurEntry.getName() << "\"\n";
561 if (DirToRemove != i)
562 llvm::errs() << " as it is a non-system directory that duplicates "
563 << "a system directory\n";
564 }
565 if (DirToRemove != i)
566 ++NonSystemRemoved;
567
568 // This is reached if the current entry is a duplicate. Remove the
569 // DirToRemove (usually the current dir).
570 SearchList.erase(SearchList.begin()+DirToRemove);
571 --i;
572 }
573 return NonSystemRemoved;
574 }
575
576
Realize(const LangOptions & Lang)577 void InitHeaderSearch::Realize(const LangOptions &Lang) {
578 // Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
579 std::vector<DirectoryLookup> SearchList;
580 SearchList.reserve(IncludePath.size());
581
582 // Quoted arguments go first.
583 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end();
584 it != ie; ++it) {
585 if (it->first == Quoted)
586 SearchList.push_back(it->second);
587 }
588 // Deduplicate and remember index.
589 RemoveDuplicates(SearchList, 0, Verbose);
590 unsigned NumQuoted = SearchList.size();
591
592 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end();
593 it != ie; ++it) {
594 if (it->first == Angled || it->first == IndexHeaderMap)
595 SearchList.push_back(it->second);
596 }
597
598 RemoveDuplicates(SearchList, NumQuoted, Verbose);
599 unsigned NumAngled = SearchList.size();
600
601 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end();
602 it != ie; ++it) {
603 if (it->first == System ||
604 (!Lang.ObjC1 && !Lang.CPlusPlus && it->first == CSystem) ||
605 (/*FIXME !Lang.ObjC1 && */Lang.CPlusPlus && it->first == CXXSystem) ||
606 (Lang.ObjC1 && !Lang.CPlusPlus && it->first == ObjCSystem) ||
607 (Lang.ObjC1 && Lang.CPlusPlus && it->first == ObjCXXSystem))
608 SearchList.push_back(it->second);
609 }
610
611 for (path_iterator it = IncludePath.begin(), ie = IncludePath.end();
612 it != ie; ++it) {
613 if (it->first == After)
614 SearchList.push_back(it->second);
615 }
616
617 // Remove duplicates across both the Angled and System directories. GCC does
618 // this and failing to remove duplicates across these two groups breaks
619 // #include_next.
620 unsigned NonSystemRemoved = RemoveDuplicates(SearchList, NumQuoted, Verbose);
621 NumAngled -= NonSystemRemoved;
622
623 bool DontSearchCurDir = false; // TODO: set to true if -I- is set?
624 Headers.SetSearchPaths(SearchList, NumQuoted, NumAngled, DontSearchCurDir);
625
626 // If verbose, print the list of directories that will be searched.
627 if (Verbose) {
628 llvm::errs() << "#include \"...\" search starts here:\n";
629 for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
630 if (i == NumQuoted)
631 llvm::errs() << "#include <...> search starts here:\n";
632 const char *Name = SearchList[i].getName();
633 const char *Suffix;
634 if (SearchList[i].isNormalDir())
635 Suffix = "";
636 else if (SearchList[i].isFramework())
637 Suffix = " (framework directory)";
638 else {
639 assert(SearchList[i].isHeaderMap() && "Unknown DirectoryLookup");
640 Suffix = " (headermap)";
641 }
642 llvm::errs() << " " << Name << Suffix << "\n";
643 }
644 llvm::errs() << "End of search list.\n";
645 }
646 }
647
ApplyHeaderSearchOptions(HeaderSearch & HS,const HeaderSearchOptions & HSOpts,const LangOptions & Lang,const llvm::Triple & Triple)648 void clang::ApplyHeaderSearchOptions(HeaderSearch &HS,
649 const HeaderSearchOptions &HSOpts,
650 const LangOptions &Lang,
651 const llvm::Triple &Triple) {
652 InitHeaderSearch Init(HS, HSOpts.Verbose, HSOpts.Sysroot);
653
654 // Add the user defined entries.
655 for (unsigned i = 0, e = HSOpts.UserEntries.size(); i != e; ++i) {
656 const HeaderSearchOptions::Entry &E = HSOpts.UserEntries[i];
657 Init.AddPath(E.Path, E.Group, !E.ImplicitExternC, E.IsUserSupplied,
658 E.IsFramework, E.IgnoreSysRoot);
659 }
660
661 Init.AddDefaultIncludePaths(Lang, Triple, HSOpts);
662
663 if (HSOpts.UseBuiltinIncludes) {
664 // Set up the builtin include directory in the module map.
665 llvm::sys::Path P(HSOpts.ResourceDir);
666 P.appendComponent("include");
667 if (const DirectoryEntry *Dir = HS.getFileMgr().getDirectory(P.str()))
668 HS.getModuleMap().setBuiltinIncludeDir(Dir);
669 }
670
671 Init.Realize(Lang);
672 }
673