clang  8.0.0svn
Linux.cpp
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1 //===--- Linux.h - Linux ToolChain Implementations --------------*- C++ -*-===//
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 #include "Linux.h"
11 #include "Arch/ARM.h"
12 #include "Arch/Mips.h"
13 #include "Arch/PPC.h"
14 #include "Arch/RISCV.h"
15 #include "CommonArgs.h"
16 #include "clang/Config/config.h"
17 #include "clang/Driver/Distro.h"
18 #include "clang/Driver/Driver.h"
19 #include "clang/Driver/Options.h"
21 #include "llvm/Option/ArgList.h"
22 #include "llvm/ProfileData/InstrProf.h"
23 #include "llvm/Support/Path.h"
24 #include "llvm/Support/ScopedPrinter.h"
25 #include "llvm/Support/VirtualFileSystem.h"
26 #include <system_error>
27 
28 using namespace clang::driver;
29 using namespace clang::driver::toolchains;
30 using namespace clang;
31 using namespace llvm::opt;
32 
34 
35 /// Get our best guess at the multiarch triple for a target.
36 ///
37 /// Debian-based systems are starting to use a multiarch setup where they use
38 /// a target-triple directory in the library and header search paths.
39 /// Unfortunately, this triple does not align with the vanilla target triple,
40 /// so we provide a rough mapping here.
41 static std::string getMultiarchTriple(const Driver &D,
42  const llvm::Triple &TargetTriple,
43  StringRef SysRoot) {
44  llvm::Triple::EnvironmentType TargetEnvironment =
45  TargetTriple.getEnvironment();
46  bool IsAndroid = TargetTriple.isAndroid();
47  bool IsMipsR6 = TargetTriple.getSubArch() == llvm::Triple::MipsSubArch_r6;
48 
49  // For most architectures, just use whatever we have rather than trying to be
50  // clever.
51  switch (TargetTriple.getArch()) {
52  default:
53  break;
54 
55  // We use the existence of '/lib/<triple>' as a directory to detect some
56  // common linux triples that don't quite match the Clang triple for both
57  // 32-bit and 64-bit targets. Multiarch fixes its install triples to these
58  // regardless of what the actual target triple is.
59  case llvm::Triple::arm:
60  case llvm::Triple::thumb:
61  if (IsAndroid) {
62  return "arm-linux-androideabi";
63  } else if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
64  if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabihf"))
65  return "arm-linux-gnueabihf";
66  } else {
67  if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabi"))
68  return "arm-linux-gnueabi";
69  }
70  break;
71  case llvm::Triple::armeb:
72  case llvm::Triple::thumbeb:
73  if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
74  if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabihf"))
75  return "armeb-linux-gnueabihf";
76  } else {
77  if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabi"))
78  return "armeb-linux-gnueabi";
79  }
80  break;
81  case llvm::Triple::x86:
82  if (IsAndroid)
83  return "i686-linux-android";
84  if (D.getVFS().exists(SysRoot + "/lib/i386-linux-gnu"))
85  return "i386-linux-gnu";
86  break;
87  case llvm::Triple::x86_64:
88  if (IsAndroid)
89  return "x86_64-linux-android";
90  // We don't want this for x32, otherwise it will match x86_64 libs
91  if (TargetEnvironment != llvm::Triple::GNUX32 &&
92  D.getVFS().exists(SysRoot + "/lib/x86_64-linux-gnu"))
93  return "x86_64-linux-gnu";
94  break;
95  case llvm::Triple::aarch64:
96  if (IsAndroid)
97  return "aarch64-linux-android";
98  if (D.getVFS().exists(SysRoot + "/lib/aarch64-linux-gnu"))
99  return "aarch64-linux-gnu";
100  break;
101  case llvm::Triple::aarch64_be:
102  if (D.getVFS().exists(SysRoot + "/lib/aarch64_be-linux-gnu"))
103  return "aarch64_be-linux-gnu";
104  break;
105  case llvm::Triple::mips: {
106  std::string Arch = IsMipsR6 ? "mipsisa32r6" : "mips";
107  if (D.getVFS().exists(SysRoot + "/lib/" + Arch + "-linux-gnu"))
108  return Arch + "-linux-gnu";
109  break;
110  }
111  case llvm::Triple::mipsel: {
112  if (IsAndroid)
113  return "mipsel-linux-android";
114  std::string Arch = IsMipsR6 ? "mipsisa32r6el" : "mipsel";
115  if (D.getVFS().exists(SysRoot + "/lib/" + Arch + "-linux-gnu"))
116  return Arch + "-linux-gnu";
117  break;
118  }
119  case llvm::Triple::mips64: {
120  std::string Arch = IsMipsR6 ? "mipsisa64r6" : "mips64";
121  std::string ABI = llvm::Triple::getEnvironmentTypeName(TargetEnvironment);
122  if (D.getVFS().exists(SysRoot + "/lib/" + Arch + "-linux-" + ABI))
123  return Arch + "-linux-" + ABI;
124  break;
125  }
126  case llvm::Triple::mips64el: {
127  if (IsAndroid)
128  return "mips64el-linux-android";
129  std::string Arch = IsMipsR6 ? "mipsisa64r6el" : "mips64el";
130  std::string ABI = llvm::Triple::getEnvironmentTypeName(TargetEnvironment);
131  if (D.getVFS().exists(SysRoot + "/lib/" + Arch + "-linux-" + ABI))
132  return Arch + "-linux-" + ABI;
133  break;
134  }
135  case llvm::Triple::ppc:
136  if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnuspe"))
137  return "powerpc-linux-gnuspe";
138  if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnu"))
139  return "powerpc-linux-gnu";
140  break;
141  case llvm::Triple::ppc64:
142  if (D.getVFS().exists(SysRoot + "/lib/powerpc64-linux-gnu"))
143  return "powerpc64-linux-gnu";
144  break;
145  case llvm::Triple::ppc64le:
146  if (D.getVFS().exists(SysRoot + "/lib/powerpc64le-linux-gnu"))
147  return "powerpc64le-linux-gnu";
148  break;
149  case llvm::Triple::sparc:
150  if (D.getVFS().exists(SysRoot + "/lib/sparc-linux-gnu"))
151  return "sparc-linux-gnu";
152  break;
153  case llvm::Triple::sparcv9:
154  if (D.getVFS().exists(SysRoot + "/lib/sparc64-linux-gnu"))
155  return "sparc64-linux-gnu";
156  break;
157  case llvm::Triple::systemz:
158  if (D.getVFS().exists(SysRoot + "/lib/s390x-linux-gnu"))
159  return "s390x-linux-gnu";
160  break;
161  }
162  return TargetTriple.str();
163 }
164 
165 static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args) {
166  if (Triple.isMIPS()) {
167  if (Triple.isAndroid()) {
168  StringRef CPUName;
169  StringRef ABIName;
170  tools::mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
171  if (CPUName == "mips32r6")
172  return "libr6";
173  if (CPUName == "mips32r2")
174  return "libr2";
175  }
176  // lib32 directory has a special meaning on MIPS targets.
177  // It contains N32 ABI binaries. Use this folder if produce
178  // code for N32 ABI only.
179  if (tools::mips::hasMipsAbiArg(Args, "n32"))
180  return "lib32";
181  return Triple.isArch32Bit() ? "lib" : "lib64";
182  }
183 
184  // It happens that only x86 and PPC use the 'lib32' variant of oslibdir, and
185  // using that variant while targeting other architectures causes problems
186  // because the libraries are laid out in shared system roots that can't cope
187  // with a 'lib32' library search path being considered. So we only enable
188  // them when we know we may need it.
189  //
190  // FIXME: This is a bit of a hack. We should really unify this code for
191  // reasoning about oslibdir spellings with the lib dir spellings in the
192  // GCCInstallationDetector, but that is a more significant refactoring.
193  if (Triple.getArch() == llvm::Triple::x86 ||
194  Triple.getArch() == llvm::Triple::ppc)
195  return "lib32";
196 
197  if (Triple.getArch() == llvm::Triple::x86_64 &&
198  Triple.getEnvironment() == llvm::Triple::GNUX32)
199  return "libx32";
200 
201  if (Triple.getArch() == llvm::Triple::riscv32)
202  return "lib32";
203 
204  return Triple.isArch32Bit() ? "lib" : "lib64";
205 }
206 
207 static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs,
208  const Multilib &Multilib,
209  StringRef InstallPath,
210  ToolChain::path_list &Paths) {
211  if (const auto &PathsCallback = Multilibs.filePathsCallback())
212  for (const auto &Path : PathsCallback(Multilib))
213  addPathIfExists(D, InstallPath + Path, Paths);
214 }
215 
216 Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
217  : Generic_ELF(D, Triple, Args) {
218  GCCInstallation.init(Triple, Args);
221  llvm::Triple::ArchType Arch = Triple.getArch();
222  std::string SysRoot = computeSysRoot();
223 
224  // Cross-compiling binutils and GCC installations (vanilla and openSUSE at
225  // least) put various tools in a triple-prefixed directory off of the parent
226  // of the GCC installation. We use the GCC triple here to ensure that we end
227  // up with tools that support the same amount of cross compiling as the
228  // detected GCC installation. For example, if we find a GCC installation
229  // targeting x86_64, but it is a bi-arch GCC installation, it can also be
230  // used to target i386.
231  // FIXME: This seems unlikely to be Linux-specific.
233  PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
234  GCCInstallation.getTriple().str() + "/bin")
235  .str());
236 
237  Distro Distro(D.getVFS());
238 
239  if (Distro.IsAlpineLinux() || Triple.isAndroid()) {
240  ExtraOpts.push_back("-z");
241  ExtraOpts.push_back("now");
242  }
243 
245  Triple.isAndroid()) {
246  ExtraOpts.push_back("-z");
247  ExtraOpts.push_back("relro");
248  }
249 
250  // The lld default page size is too large for Aarch64, which produces much
251  // larger .so files and images for arm64 device targets. Use 4KB page size
252  // for Android arm64 targets instead.
253  if (Triple.isAArch64() && Triple.isAndroid()) {
254  ExtraOpts.push_back("-z");
255  ExtraOpts.push_back("max-page-size=4096");
256  }
257 
258  if (GCCInstallation.getParentLibPath().find("opt/rh/devtoolset") !=
259  StringRef::npos)
260  // With devtoolset on RHEL, we want to add a bin directory that is relative
261  // to the detected gcc install, because if we are using devtoolset gcc then
262  // we want to use other tools from devtoolset (e.g. ld) instead of the
263  // standard system tools.
264  PPaths.push_back(Twine(GCCInstallation.getParentLibPath() +
265  "/../bin").str());
266 
267  if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
268  ExtraOpts.push_back("-X");
269 
270  const bool IsAndroid = Triple.isAndroid();
271  const bool IsMips = Triple.isMIPS();
272  const bool IsHexagon = Arch == llvm::Triple::hexagon;
273  const bool IsRISCV =
274  Arch == llvm::Triple::riscv32 || Arch == llvm::Triple::riscv64;
275 
276  if (IsMips && !SysRoot.empty())
277  ExtraOpts.push_back("--sysroot=" + SysRoot);
278 
279  // Do not use 'gnu' hash style for Mips targets because .gnu.hash
280  // and the MIPS ABI require .dynsym to be sorted in different ways.
281  // .gnu.hash needs symbols to be grouped by hash code whereas the MIPS
282  // ABI requires a mapping between the GOT and the symbol table.
283  // Android loader does not support .gnu.hash until API 23.
284  // Hexagon linker/loader does not support .gnu.hash
285  if (!IsMips && !IsHexagon) {
288  (IsAndroid && !Triple.isAndroidVersionLT(23)))
289  ExtraOpts.push_back("--hash-style=gnu");
290 
291  if (Distro.IsDebian() || Distro.IsOpenSUSE() ||
294  (IsAndroid && Triple.isAndroidVersionLT(23)))
295  ExtraOpts.push_back("--hash-style=both");
296  }
297 
299  ExtraOpts.push_back("--no-add-needed");
300 
301 #ifdef ENABLE_LINKER_BUILD_ID
302  ExtraOpts.push_back("--build-id");
303 #endif
304 
305  if (IsAndroid || Distro.IsOpenSUSE())
306  ExtraOpts.push_back("--enable-new-dtags");
307 
308  // The selection of paths to try here is designed to match the patterns which
309  // the GCC driver itself uses, as this is part of the GCC-compatible driver.
310  // This was determined by running GCC in a fake filesystem, creating all
311  // possible permutations of these directories, and seeing which ones it added
312  // to the link paths.
313  path_list &Paths = getFilePaths();
314 
315  const std::string OSLibDir = getOSLibDir(Triple, Args);
316  const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
317 
318  // Add the multilib suffixed paths where they are available.
319  if (GCCInstallation.isValid()) {
320  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
321  const std::string &LibPath = GCCInstallation.getParentLibPath();
322 
323  // Add toolchain / multilib specific file paths.
326 
327  // Sourcery CodeBench MIPS toolchain holds some libraries under
328  // a biarch-like suffix of the GCC installation.
330  Paths);
331 
332  // GCC cross compiling toolchains will install target libraries which ship
333  // as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
334  // any part of the GCC installation in
335  // <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
336  // debatable, but is the reality today. We need to search this tree even
337  // when we have a sysroot somewhere else. It is the responsibility of
338  // whomever is doing the cross build targeting a sysroot using a GCC
339  // installation that is *not* within the system root to ensure two things:
340  //
341  // 1) Any DSOs that are linked in from this tree or from the install path
342  // above must be present on the system root and found via an
343  // appropriate rpath.
344  // 2) There must not be libraries installed into
345  // <prefix>/<triple>/<libdir> unless they should be preferred over
346  // those within the system root.
347  //
348  // Note that this matches the GCC behavior. See the below comment for where
349  // Clang diverges from GCC's behavior.
350  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" +
351  OSLibDir + SelectedMultilib.osSuffix(),
352  Paths);
353 
354  // If the GCC installation we found is inside of the sysroot, we want to
355  // prefer libraries installed in the parent prefix of the GCC installation.
356  // It is important to *not* use these paths when the GCC installation is
357  // outside of the system root as that can pick up unintended libraries.
358  // This usually happens when there is an external cross compiler on the
359  // host system, and a more minimal sysroot available that is the target of
360  // the cross. Note that GCC does include some of these directories in some
361  // configurations but this seems somewhere between questionable and simply
362  // a bug.
363  if (StringRef(LibPath).startswith(SysRoot)) {
364  addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths);
365  addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
366  }
367  }
368 
369  // Similar to the logic for GCC above, if we currently running Clang inside
370  // of the requested system root, add its parent library paths to
371  // those searched.
372  // FIXME: It's not clear whether we should use the driver's installed
373  // directory ('Dir' below) or the ResourceDir.
374  if (StringRef(D.Dir).startswith(SysRoot)) {
375  addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths);
376  addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths);
377  }
378 
379  addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
380  addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
381 
382  if (IsAndroid) {
383  // Android sysroots contain a library directory for each supported OS
384  // version as well as some unversioned libraries in the usual multiarch
385  // directory.
386  unsigned Major;
387  unsigned Minor;
388  unsigned Micro;
389  Triple.getEnvironmentVersion(Major, Minor, Micro);
390  addPathIfExists(D,
391  SysRoot + "/usr/lib/" + MultiarchTriple + "/" +
392  llvm::to_string(Major),
393  Paths);
394  }
395 
396  addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths);
397  // 64-bit OpenEmbedded sysroots may not have a /usr/lib dir. So they cannot
398  // find /usr/lib64 as it is referenced as /usr/lib/../lib64. So we handle
399  // this here.
400  if (Triple.getVendor() == llvm::Triple::OpenEmbedded &&
401  Triple.isArch64Bit())
402  addPathIfExists(D, SysRoot + "/usr/" + OSLibDir, Paths);
403  else
404  addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths);
405  if (IsRISCV) {
406  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
407  addPathIfExists(D, SysRoot + "/" + OSLibDir + "/" + ABIName, Paths);
408  addPathIfExists(D, SysRoot + "/usr/" + OSLibDir + "/" + ABIName, Paths);
409  }
410 
411  // Try walking via the GCC triple path in case of biarch or multiarch GCC
412  // installations with strange symlinks.
413  if (GCCInstallation.isValid()) {
414  addPathIfExists(D,
415  SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() +
416  "/../../" + OSLibDir,
417  Paths);
418 
419  // Add the 'other' biarch variant path
420  Multilib BiarchSibling;
421  if (GCCInstallation.getBiarchSibling(BiarchSibling)) {
423  BiarchSibling.gccSuffix(),
424  Paths);
425  }
426 
427  // See comments above on the multilib variant for details of why this is
428  // included even from outside the sysroot.
429  const std::string &LibPath = GCCInstallation.getParentLibPath();
430  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
432  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" +
433  Multilib.osSuffix(),
434  Paths);
435 
436  // See comments above on the multilib variant for details of why this is
437  // only included from within the sysroot.
438  if (StringRef(LibPath).startswith(SysRoot))
439  addPathIfExists(D, LibPath, Paths);
440  }
441 
442  // Similar to the logic for GCC above, if we are currently running Clang
443  // inside of the requested system root, add its parent library path to those
444  // searched.
445  // FIXME: It's not clear whether we should use the driver's installed
446  // directory ('Dir' below) or the ResourceDir.
447  if (StringRef(D.Dir).startswith(SysRoot))
448  addPathIfExists(D, D.Dir + "/../lib", Paths);
449 
450  addPathIfExists(D, SysRoot + "/lib", Paths);
451  addPathIfExists(D, SysRoot + "/usr/lib", Paths);
452 }
453 
455  if (getTriple().isAndroid())
456  return ToolChain::CST_Libcxx;
458 }
459 
460 bool Linux::HasNativeLLVMSupport() const { return true; }
461 
462 Tool *Linux::buildLinker() const { return new tools::gnutools::Linker(*this); }
463 
465  return new tools::gnutools::Assembler(*this);
466 }
467 
468 std::string Linux::computeSysRoot() const {
469  if (!getDriver().SysRoot.empty())
470  return getDriver().SysRoot;
471 
472  if (getTriple().isAndroid()) {
473  // Android toolchains typically include a sysroot at ../sysroot relative to
474  // the clang binary.
475  const StringRef ClangDir = getDriver().getInstalledDir();
476  std::string AndroidSysRootPath = (ClangDir + "/../sysroot").str();
477  if (getVFS().exists(AndroidSysRootPath))
478  return AndroidSysRootPath;
479  }
480 
481  if (!GCCInstallation.isValid() || !getTriple().isMIPS())
482  return std::string();
483 
484  // Standalone MIPS toolchains use different names for sysroot folder
485  // and put it into different places. Here we try to check some known
486  // variants.
487 
488  const StringRef InstallDir = GCCInstallation.getInstallPath();
489  const StringRef TripleStr = GCCInstallation.getTriple().str();
491 
492  std::string Path =
493  (InstallDir + "/../../../../" + TripleStr + "/libc" + Multilib.osSuffix())
494  .str();
495 
496  if (getVFS().exists(Path))
497  return Path;
498 
499  Path = (InstallDir + "/../../../../sysroot" + Multilib.osSuffix()).str();
500 
501  if (getVFS().exists(Path))
502  return Path;
503 
504  return std::string();
505 }
506 
507 std::string Linux::getDynamicLinker(const ArgList &Args) const {
508  const llvm::Triple::ArchType Arch = getArch();
509  const llvm::Triple &Triple = getTriple();
510 
511  const Distro Distro(getDriver().getVFS());
512 
513  if (Triple.isAndroid())
514  return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker";
515 
516  if (Triple.isMusl()) {
517  std::string ArchName;
518  bool IsArm = false;
519 
520  switch (Arch) {
521  case llvm::Triple::arm:
522  case llvm::Triple::thumb:
523  ArchName = "arm";
524  IsArm = true;
525  break;
526  case llvm::Triple::armeb:
527  case llvm::Triple::thumbeb:
528  ArchName = "armeb";
529  IsArm = true;
530  break;
531  default:
532  ArchName = Triple.getArchName().str();
533  }
534  if (IsArm &&
535  (Triple.getEnvironment() == llvm::Triple::MuslEABIHF ||
537  ArchName += "hf";
538 
539  return "/lib/ld-musl-" + ArchName + ".so.1";
540  }
541 
542  std::string LibDir;
543  std::string Loader;
544 
545  switch (Arch) {
546  default:
547  llvm_unreachable("unsupported architecture");
548 
549  case llvm::Triple::aarch64:
550  LibDir = "lib";
551  Loader = "ld-linux-aarch64.so.1";
552  break;
553  case llvm::Triple::aarch64_be:
554  LibDir = "lib";
555  Loader = "ld-linux-aarch64_be.so.1";
556  break;
557  case llvm::Triple::arm:
558  case llvm::Triple::thumb:
559  case llvm::Triple::armeb:
560  case llvm::Triple::thumbeb: {
561  const bool HF =
562  Triple.getEnvironment() == llvm::Triple::GNUEABIHF ||
564 
565  LibDir = "lib";
566  Loader = HF ? "ld-linux-armhf.so.3" : "ld-linux.so.3";
567  break;
568  }
569  case llvm::Triple::mips:
570  case llvm::Triple::mipsel:
571  case llvm::Triple::mips64:
572  case llvm::Triple::mips64el: {
573  bool IsNaN2008 = tools::mips::isNaN2008(Args, Triple);
574 
575  LibDir = "lib" + tools::mips::getMipsABILibSuffix(Args, Triple);
576 
577  if (tools::mips::isUCLibc(Args))
578  Loader = IsNaN2008 ? "ld-uClibc-mipsn8.so.0" : "ld-uClibc.so.0";
579  else if (!Triple.hasEnvironment() &&
580  Triple.getVendor() == llvm::Triple::VendorType::MipsTechnologies)
581  Loader =
582  Triple.isLittleEndian() ? "ld-musl-mipsel.so.1" : "ld-musl-mips.so.1";
583  else
584  Loader = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1";
585 
586  break;
587  }
588  case llvm::Triple::ppc:
589  LibDir = "lib";
590  Loader = "ld.so.1";
591  break;
592  case llvm::Triple::ppc64:
593  LibDir = "lib64";
594  Loader =
595  (tools::ppc::hasPPCAbiArg(Args, "elfv2")) ? "ld64.so.2" : "ld64.so.1";
596  break;
597  case llvm::Triple::ppc64le:
598  LibDir = "lib64";
599  Loader =
600  (tools::ppc::hasPPCAbiArg(Args, "elfv1")) ? "ld64.so.1" : "ld64.so.2";
601  break;
602  case llvm::Triple::riscv32: {
603  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
604  LibDir = "lib";
605  Loader = ("ld-linux-riscv32-" + ABIName + ".so.1").str();
606  break;
607  }
608  case llvm::Triple::riscv64: {
609  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
610  LibDir = "lib";
611  Loader = ("ld-linux-riscv64-" + ABIName + ".so.1").str();
612  break;
613  }
614  case llvm::Triple::sparc:
615  case llvm::Triple::sparcel:
616  LibDir = "lib";
617  Loader = "ld-linux.so.2";
618  break;
619  case llvm::Triple::sparcv9:
620  LibDir = "lib64";
621  Loader = "ld-linux.so.2";
622  break;
623  case llvm::Triple::systemz:
624  LibDir = "lib";
625  Loader = "ld64.so.1";
626  break;
627  case llvm::Triple::x86:
628  LibDir = "lib";
629  Loader = "ld-linux.so.2";
630  break;
631  case llvm::Triple::x86_64: {
632  bool X32 = Triple.getEnvironment() == llvm::Triple::GNUX32;
633 
634  LibDir = X32 ? "libx32" : "lib64";
635  Loader = X32 ? "ld-linux-x32.so.2" : "ld-linux-x86-64.so.2";
636  break;
637  }
638  }
639 
640  if (Distro == Distro::Exherbo && (Triple.getVendor() == llvm::Triple::UnknownVendor ||
641  Triple.getVendor() == llvm::Triple::PC))
642  return "/usr/" + Triple.str() + "/lib/" + Loader;
643  return "/" + LibDir + "/" + Loader;
644 }
645 
646 void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
647  ArgStringList &CC1Args) const {
648  const Driver &D = getDriver();
649  std::string SysRoot = computeSysRoot();
650 
651  if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
652  return;
653 
654  if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
655  addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include");
656 
657  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
659  llvm::sys::path::append(P, "include");
660  addSystemInclude(DriverArgs, CC1Args, P);
661  }
662 
663  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
664  return;
665 
666  // Check for configure-time C include directories.
667  StringRef CIncludeDirs(C_INCLUDE_DIRS);
668  if (CIncludeDirs != "") {
670  CIncludeDirs.split(dirs, ":");
671  for (StringRef dir : dirs) {
672  StringRef Prefix =
673  llvm::sys::path::is_absolute(dir) ? StringRef(SysRoot) : "";
674  addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
675  }
676  return;
677  }
678 
679  // Lacking those, try to detect the correct set of system includes for the
680  // target triple.
681 
682  // Add include directories specific to the selected multilib set and multilib.
683  if (GCCInstallation.isValid()) {
684  const auto &Callback = Multilibs.includeDirsCallback();
685  if (Callback) {
686  for (const auto &Path : Callback(GCCInstallation.getMultilib()))
688  DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path);
689  }
690  }
691 
692  // Implement generic Debian multiarch support.
693  const StringRef X86_64MultiarchIncludeDirs[] = {
694  "/usr/include/x86_64-linux-gnu",
695 
696  // FIXME: These are older forms of multiarch. It's not clear that they're
697  // in use in any released version of Debian, so we should consider
698  // removing them.
699  "/usr/include/i686-linux-gnu/64", "/usr/include/i486-linux-gnu/64"};
700  const StringRef X86MultiarchIncludeDirs[] = {
701  "/usr/include/i386-linux-gnu",
702 
703  // FIXME: These are older forms of multiarch. It's not clear that they're
704  // in use in any released version of Debian, so we should consider
705  // removing them.
706  "/usr/include/x86_64-linux-gnu/32", "/usr/include/i686-linux-gnu",
707  "/usr/include/i486-linux-gnu"};
708  const StringRef AArch64MultiarchIncludeDirs[] = {
709  "/usr/include/aarch64-linux-gnu"};
710  const StringRef ARMMultiarchIncludeDirs[] = {
711  "/usr/include/arm-linux-gnueabi"};
712  const StringRef ARMHFMultiarchIncludeDirs[] = {
713  "/usr/include/arm-linux-gnueabihf"};
714  const StringRef ARMEBMultiarchIncludeDirs[] = {
715  "/usr/include/armeb-linux-gnueabi"};
716  const StringRef ARMEBHFMultiarchIncludeDirs[] = {
717  "/usr/include/armeb-linux-gnueabihf"};
718  const StringRef MIPSMultiarchIncludeDirs[] = {"/usr/include/mips-linux-gnu"};
719  const StringRef MIPSELMultiarchIncludeDirs[] = {
720  "/usr/include/mipsel-linux-gnu"};
721  const StringRef MIPS64MultiarchIncludeDirs[] = {
722  "/usr/include/mips64-linux-gnuabi64"};
723  const StringRef MIPS64ELMultiarchIncludeDirs[] = {
724  "/usr/include/mips64el-linux-gnuabi64"};
725  const StringRef MIPSN32MultiarchIncludeDirs[] = {
726  "/usr/include/mips64-linux-gnuabin32"};
727  const StringRef MIPSN32ELMultiarchIncludeDirs[] = {
728  "/usr/include/mips64el-linux-gnuabin32"};
729  const StringRef MIPSR6MultiarchIncludeDirs[] = {
730  "/usr/include/mipsisa32-linux-gnu"};
731  const StringRef MIPSR6ELMultiarchIncludeDirs[] = {
732  "/usr/include/mipsisa32r6el-linux-gnu"};
733  const StringRef MIPS64R6MultiarchIncludeDirs[] = {
734  "/usr/include/mipsisa64r6-linux-gnuabi64"};
735  const StringRef MIPS64R6ELMultiarchIncludeDirs[] = {
736  "/usr/include/mipsisa64r6el-linux-gnuabi64"};
737  const StringRef MIPSN32R6MultiarchIncludeDirs[] = {
738  "/usr/include/mipsisa64r6-linux-gnuabin32"};
739  const StringRef MIPSN32R6ELMultiarchIncludeDirs[] = {
740  "/usr/include/mipsisa64r6el-linux-gnuabin32"};
741  const StringRef PPCMultiarchIncludeDirs[] = {
742  "/usr/include/powerpc-linux-gnu",
743  "/usr/include/powerpc-linux-gnuspe"};
744  const StringRef PPC64MultiarchIncludeDirs[] = {
745  "/usr/include/powerpc64-linux-gnu"};
746  const StringRef PPC64LEMultiarchIncludeDirs[] = {
747  "/usr/include/powerpc64le-linux-gnu"};
748  const StringRef SparcMultiarchIncludeDirs[] = {
749  "/usr/include/sparc-linux-gnu"};
750  const StringRef Sparc64MultiarchIncludeDirs[] = {
751  "/usr/include/sparc64-linux-gnu"};
752  const StringRef SYSTEMZMultiarchIncludeDirs[] = {
753  "/usr/include/s390x-linux-gnu"};
754  ArrayRef<StringRef> MultiarchIncludeDirs;
755  switch (getTriple().getArch()) {
756  case llvm::Triple::x86_64:
757  MultiarchIncludeDirs = X86_64MultiarchIncludeDirs;
758  break;
759  case llvm::Triple::x86:
760  MultiarchIncludeDirs = X86MultiarchIncludeDirs;
761  break;
762  case llvm::Triple::aarch64:
763  case llvm::Triple::aarch64_be:
764  MultiarchIncludeDirs = AArch64MultiarchIncludeDirs;
765  break;
766  case llvm::Triple::arm:
767  case llvm::Triple::thumb:
768  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
769  MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs;
770  else
771  MultiarchIncludeDirs = ARMMultiarchIncludeDirs;
772  break;
773  case llvm::Triple::armeb:
774  case llvm::Triple::thumbeb:
775  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
776  MultiarchIncludeDirs = ARMEBHFMultiarchIncludeDirs;
777  else
778  MultiarchIncludeDirs = ARMEBMultiarchIncludeDirs;
779  break;
780  case llvm::Triple::mips:
781  if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6)
782  MultiarchIncludeDirs = MIPSR6MultiarchIncludeDirs;
783  else
784  MultiarchIncludeDirs = MIPSMultiarchIncludeDirs;
785  break;
786  case llvm::Triple::mipsel:
787  if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6)
788  MultiarchIncludeDirs = MIPSR6ELMultiarchIncludeDirs;
789  else
790  MultiarchIncludeDirs = MIPSELMultiarchIncludeDirs;
791  break;
792  case llvm::Triple::mips64:
793  if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6)
794  if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32)
795  MultiarchIncludeDirs = MIPSN32R6MultiarchIncludeDirs;
796  else
797  MultiarchIncludeDirs = MIPS64R6MultiarchIncludeDirs;
798  else if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32)
799  MultiarchIncludeDirs = MIPSN32MultiarchIncludeDirs;
800  else
801  MultiarchIncludeDirs = MIPS64MultiarchIncludeDirs;
802  break;
803  case llvm::Triple::mips64el:
804  if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6)
805  if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32)
806  MultiarchIncludeDirs = MIPSN32R6ELMultiarchIncludeDirs;
807  else
808  MultiarchIncludeDirs = MIPS64R6ELMultiarchIncludeDirs;
809  else if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32)
810  MultiarchIncludeDirs = MIPSN32ELMultiarchIncludeDirs;
811  else
812  MultiarchIncludeDirs = MIPS64ELMultiarchIncludeDirs;
813  break;
814  case llvm::Triple::ppc:
815  MultiarchIncludeDirs = PPCMultiarchIncludeDirs;
816  break;
817  case llvm::Triple::ppc64:
818  MultiarchIncludeDirs = PPC64MultiarchIncludeDirs;
819  break;
820  case llvm::Triple::ppc64le:
821  MultiarchIncludeDirs = PPC64LEMultiarchIncludeDirs;
822  break;
823  case llvm::Triple::sparc:
824  MultiarchIncludeDirs = SparcMultiarchIncludeDirs;
825  break;
826  case llvm::Triple::sparcv9:
827  MultiarchIncludeDirs = Sparc64MultiarchIncludeDirs;
828  break;
829  case llvm::Triple::systemz:
830  MultiarchIncludeDirs = SYSTEMZMultiarchIncludeDirs;
831  break;
832  default:
833  break;
834  }
835 
836  const std::string AndroidMultiarchIncludeDir =
837  std::string("/usr/include/") +
838  getMultiarchTriple(D, getTriple(), SysRoot);
839  const StringRef AndroidMultiarchIncludeDirs[] = {AndroidMultiarchIncludeDir};
840  if (getTriple().isAndroid())
841  MultiarchIncludeDirs = AndroidMultiarchIncludeDirs;
842 
843  for (StringRef Dir : MultiarchIncludeDirs) {
844  if (D.getVFS().exists(SysRoot + Dir)) {
845  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + Dir);
846  break;
847  }
848  }
849 
850  if (getTriple().getOS() == llvm::Triple::RTEMS)
851  return;
852 
853  // Add an include of '/include' directly. This isn't provided by default by
854  // system GCCs, but is often used with cross-compiling GCCs, and harmless to
855  // add even when Clang is acting as-if it were a system compiler.
856  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include");
857 
858  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include");
859 }
860 
861 static std::string DetectLibcxxIncludePath(StringRef base) {
862  std::error_code EC;
863  int MaxVersion = 0;
864  std::string MaxVersionString = "";
865  for (llvm::sys::fs::directory_iterator LI(base, EC), LE; !EC && LI != LE;
866  LI = LI.increment(EC)) {
867  StringRef VersionText = llvm::sys::path::filename(LI->path());
868  int Version;
869  if (VersionText[0] == 'v' &&
870  !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) {
871  if (Version > MaxVersion) {
872  MaxVersion = Version;
873  MaxVersionString = VersionText;
874  }
875  }
876  }
877  return MaxVersion ? (base + "/" + MaxVersionString).str() : "";
878 }
879 
880 void Linux::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
881  llvm::opt::ArgStringList &CC1Args) const {
882  const std::string& SysRoot = computeSysRoot();
883  const std::string LibCXXIncludePathCandidates[] = {
884  DetectLibcxxIncludePath(getDriver().ResourceDir + "/include/c++"),
885  DetectLibcxxIncludePath(getDriver().Dir + "/../include/c++"),
886  // If this is a development, non-installed, clang, libcxx will
887  // not be found at ../include/c++ but it likely to be found at
888  // one of the following two locations:
889  DetectLibcxxIncludePath(SysRoot + "/usr/local/include/c++"),
890  DetectLibcxxIncludePath(SysRoot + "/usr/include/c++") };
891  for (const auto &IncludePath : LibCXXIncludePathCandidates) {
892  if (IncludePath.empty() || !getVFS().exists(IncludePath))
893  continue;
894  // Use the first candidate that exists.
895  addSystemInclude(DriverArgs, CC1Args, IncludePath);
896  return;
897  }
898 }
899 
900 void Linux::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
901  llvm::opt::ArgStringList &CC1Args) const {
902  // We need a detected GCC installation on Linux to provide libstdc++'s
903  // headers.
904  if (!GCCInstallation.isValid())
905  return;
906 
907  // By default, look for the C++ headers in an include directory adjacent to
908  // the lib directory of the GCC installation. Note that this is expect to be
909  // equivalent to '/usr/include/c++/X.Y' in almost all cases.
910  StringRef LibDir = GCCInstallation.getParentLibPath();
911  StringRef InstallDir = GCCInstallation.getInstallPath();
912  StringRef TripleStr = GCCInstallation.getTriple().str();
914  const std::string GCCMultiarchTriple = getMultiarchTriple(
916  const std::string TargetMultiarchTriple =
918  const GCCVersion &Version = GCCInstallation.getVersion();
919 
920  // The primary search for libstdc++ supports multiarch variants.
921  if (addLibStdCXXIncludePaths(LibDir.str() + "/../include",
922  "/c++/" + Version.Text, TripleStr,
923  GCCMultiarchTriple, TargetMultiarchTriple,
924  Multilib.includeSuffix(), DriverArgs, CC1Args))
925  return;
926 
927  // Otherwise, fall back on a bunch of options which don't use multiarch
928  // layouts for simplicity.
929  const std::string LibStdCXXIncludePathCandidates[] = {
930  // Gentoo is weird and places its headers inside the GCC install,
931  // so if the first attempt to find the headers fails, try these patterns.
932  InstallDir.str() + "/include/g++-v" + Version.Text,
933  InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." +
934  Version.MinorStr,
935  InstallDir.str() + "/include/g++-v" + Version.MajorStr,
936  // Android standalone toolchain has C++ headers in yet another place.
937  LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
938  // Freescale SDK C++ headers are directly in <sysroot>/usr/include/c++,
939  // without a subdirectory corresponding to the gcc version.
940  LibDir.str() + "/../include/c++",
941  // Cray's gcc installation puts headers under "g++" without a
942  // version suffix.
943  LibDir.str() + "/../include/g++",
944  };
945 
946  for (const auto &IncludePath : LibStdCXXIncludePathCandidates) {
947  if (addLibStdCXXIncludePaths(IncludePath, /*Suffix*/ "", TripleStr,
948  /*GCCMultiarchTriple*/ "",
949  /*TargetMultiarchTriple*/ "",
950  Multilib.includeSuffix(), DriverArgs, CC1Args))
951  break;
952  }
953 }
954 
955 void Linux::AddCudaIncludeArgs(const ArgList &DriverArgs,
956  ArgStringList &CC1Args) const {
957  CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
958 }
959 
960 void Linux::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
961  ArgStringList &CC1Args) const {
962  if (GCCInstallation.isValid()) {
963  CC1Args.push_back("-isystem");
964  CC1Args.push_back(DriverArgs.MakeArgString(
965  GCCInstallation.getParentLibPath() + "/../" +
966  GCCInstallation.getTriple().str() + "/include"));
967  }
968 }
969 
970 bool Linux::isPIEDefault() const {
971  return (getTriple().isAndroid() && !getTriple().isAndroidVersionLT(16)) ||
972  getTriple().isMusl() || getSanitizerArgs().requiresPIE();
973 }
974 
976  if (getTriple().isAndroid())
977  return false;
979 }
980 
982  const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
983  const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
984  const bool IsMIPS = getTriple().isMIPS32();
985  const bool IsMIPS64 = getTriple().isMIPS64();
986  const bool IsPowerPC64 = getTriple().getArch() == llvm::Triple::ppc64 ||
987  getTriple().getArch() == llvm::Triple::ppc64le;
988  const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64 ||
989  getTriple().getArch() == llvm::Triple::aarch64_be;
990  const bool IsArmArch = getTriple().getArch() == llvm::Triple::arm ||
991  getTriple().getArch() == llvm::Triple::thumb ||
992  getTriple().getArch() == llvm::Triple::armeb ||
993  getTriple().getArch() == llvm::Triple::thumbeb;
995  Res |= SanitizerKind::Address;
996  Res |= SanitizerKind::Fuzzer;
997  Res |= SanitizerKind::FuzzerNoLink;
998  Res |= SanitizerKind::KernelAddress;
999  Res |= SanitizerKind::Memory;
1000  Res |= SanitizerKind::Vptr;
1001  Res |= SanitizerKind::SafeStack;
1002  if (IsX86_64 || IsMIPS64 || IsAArch64)
1003  Res |= SanitizerKind::DataFlow;
1004  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsArmArch || IsPowerPC64)
1005  Res |= SanitizerKind::Leak;
1006  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64)
1007  Res |= SanitizerKind::Thread;
1008  if (IsX86_64)
1009  Res |= SanitizerKind::KernelMemory;
1010  if (IsX86_64 || IsMIPS64)
1011  Res |= SanitizerKind::Efficiency;
1012  if (IsX86 || IsX86_64)
1013  Res |= SanitizerKind::Function;
1014  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch ||
1015  IsPowerPC64)
1016  Res |= SanitizerKind::Scudo;
1017  if (IsX86_64 || IsAArch64) {
1018  Res |= SanitizerKind::HWAddress;
1019  Res |= SanitizerKind::KernelHWAddress;
1020  }
1021  return Res;
1022 }
1023 
1024 void Linux::addProfileRTLibs(const llvm::opt::ArgList &Args,
1025  llvm::opt::ArgStringList &CmdArgs) const {
1026  if (!needsProfileRT(Args)) return;
1027 
1028  // Add linker option -u__llvm_runtime_variable to cause runtime
1029  // initialization module to be linked in.
1030  if ((!Args.hasArg(options::OPT_coverage)) && (!Args.hasArg(options::OPT_ftest_coverage)))
1031  CmdArgs.push_back(Args.MakeArgString(
1032  Twine("-u", llvm::getInstrProfRuntimeHookVarName())));
1033  ToolChain::addProfileRTLibs(Args, CmdArgs);
1034 }
static void addExternCSystemInclude(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Utility function to add a system include directory with extern "C" semantics to CC1 arguments...
Definition: ToolChain.cpp:717
bool isPIEDefault() const override
Test whether this toolchain defaults to PIE.
Definition: Linux.cpp:970
virtual std::string getDynamicLinker(const llvm::opt::ArgList &Args) const
Definition: Linux.cpp:507
static void addExternCSystemIncludeIfExists(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Definition: ToolChain.cpp:724
bool getBiarchSibling(Multilib &M) const
Get the biarch sibling multilib (if it exists).
Definition: Gnu.cpp:1786
const IncludeDirsFunc & includeDirsCallback() const
Definition: Multilib.h:175
const llvm::Triple & getTriple() const
Get the GCC triple for the detected install.
Definition: Gnu.h:220
StringRef P
SanitizerMask getSupportedSanitizers() const override
Return sanitizers which are available in this toolchain.
Definition: Linux.cpp:981
StringRef getOS() const
Definition: ToolChain.h:205
bool IsOpenSUSE() const
Definition: Distro.h:110
const IncludeDirsFunc & filePathsCallback() const
Definition: Multilib.h:182
void addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Definition: Linux.cpp:900
Struct to store and manipulate GCC versions.
Definition: Gnu.h:157
virtual void addProfileRTLibs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
addProfileRTLibs - When -fprofile-instr-profile is specified, try to pass a suitable profile runtime ...
Definition: ToolChain.cpp:657
FloatABI getARMFloatABI(const ToolChain &TC, const llvm::opt::ArgList &Args)
void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add arguments to use system-specific CUDA includes.
Definition: Linux.cpp:955
GCCInstallationDetector GCCInstallation
Definition: Gnu.h:280
path_list & getProgramPaths()
Definition: ToolChain.h:227
Distro - Helper class for detecting and classifying Linux distributions.
Definition: Distro.h:23
const std::string & includeSuffix() const
Get the include directory suffix.
Definition: Multilib.h:67
bool HasNativeLLVMSupport() const override
HasNativeLTOLinker - Check whether the linker and related tools have native LLVM support.
Definition: Linux.cpp:460
std::string Dir
The path the driver executable was in, as invoked from the command line.
Definition: Driver.h:120
const std::string & gccSuffix() const
Get the detected GCC installation path suffix for the multi-arch target variant.
Definition: Multilib.h:45
static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args)
Definition: Linux.cpp:165
bool isNaN2008(const llvm::opt::ArgList &Args, const llvm::Triple &Triple)
static bool needsProfileRT(const llvm::opt::ArgList &Args)
needsProfileRT - returns true if instrumentation profile is on.
Definition: ToolChain.cpp:405
const std::string & osSuffix() const
Get the detected os path suffix for the multi-arch target variant.
Definition: Multilib.h:56
static std::string DetectLibcxxIncludePath(StringRef base)
Definition: Linux.cpp:861
path_list & getFilePaths()
Definition: ToolChain.h:224
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:58
bool hasMipsAbiArg(const llvm::opt::ArgList &Args, const char *Value)
CXXStdlibType GetDefaultCXXStdlibType() const override
Definition: Linux.cpp:454
llvm::vfs::FileSystem & getVFS() const
Definition: Driver.h:297
const GCCVersion & getVersion() const
Get the detected GCC version string.
Definition: Gnu.h:239
return Out str()
void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add the clang cc1 arguments for system include paths.
Definition: Linux.cpp:646
StringRef getRISCVABI(const llvm::opt::ArgList &Args, const llvm::Triple &Triple)
CudaInstallationDetector CudaInstallation
Definition: Gnu.h:281
void addProfileRTLibs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const override
addProfileRTLibs - When -fprofile-instr-profile is specified, try to pass a suitable profile runtime ...
Definition: Linux.cpp:1024
This corresponds to a single GCC Multilib, or a segment of one controlled by a command line flag...
Definition: Multilib.h:29
virtual bool IsMathErrnoDefault() const
IsMathErrnoDefault - Does this tool chain use -fmath-errno by default.
Definition: ToolChain.h:330
bool IsDebian() const
Definition: Distro.h:114
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:202
void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
Definition: Cuda.cpp:231
static std::string getMultiarchTriple(const Driver &D, const llvm::Triple &TargetTriple, StringRef SysRoot)
Get our best guess at the multiarch triple for a target.
Definition: Linux.cpp:41
void AddIAMCUIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add arguments to use MCU GCC toolchain includes.
Definition: Linux.cpp:960
const Driver & getDriver() const
Definition: ToolChain.h:186
bool hasPPCAbiArg(const llvm::opt::ArgList &Args, const char *Value)
bool isUCLibc(const llvm::opt::ArgList &Args)
virtual std::string computeSysRoot() const
Definition: Linux.cpp:468
static void addSystemInclude(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Utility function to add a system include directory to CC1 arguments.
Definition: ToolChain.cpp:702
StringRef getParentLibPath() const
Get the detected GCC parent lib path.
Definition: Gnu.h:226
bool IsMathErrnoDefault() const override
IsMathErrnoDefault - Does this tool chain use -fmath-errno by default.
Definition: Linux.cpp:975
llvm::vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:102
bool IsAlpineLinux() const
Definition: Distro.h:122
static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs, const Multilib &Multilib, StringRef InstallPath, ToolChain::path_list &Paths)
Definition: Linux.cpp:207
Dataflow Directional Tag Classes.
std::string SysRoot
sysroot, if present
Definition: Driver.h:148
Tool - Information on a specific compilation tool.
Definition: Tool.h:34
const SanitizerArgs & getSanitizerArgs() const
Definition: ToolChain.cpp:116
const char * getInstalledDir() const
Get the path to where the clang executable was installed.
Definition: Driver.h:316
uint64_t SanitizerMask
Definition: Sanitizers.h:26
std::string MajorStr
The text of the parsed major, and major+minor versions.
Definition: Gnu.h:165
std::string Text
The unparsed text of the version.
Definition: Gnu.h:159
Tool * buildLinker() const override
Definition: Linux.cpp:462
const llvm::Triple & getTriple() const
Definition: ToolChain.h:188
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:818
bool IsRedhat() const
Definition: Distro.h:106
bool IsUbuntu() const
Definition: Distro.h:118
void addPathIfExists(const Driver &D, const Twine &Path, ToolChain::path_list &Paths)
Definition: CommonArgs.cpp:62
Tool * buildAssembler() const override
Definition: Linux.cpp:464
bool addLibStdCXXIncludePaths(Twine Base, Twine Suffix, StringRef GCCTriple, StringRef GCCMultiarchTriple, StringRef TargetMultiarchTriple, Twine IncludeSuffix, const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
Helper to add the variant paths of a libstdc++ installation.
Definition: Gnu.cpp:2516
void init(const llvm::Triple &TargetTriple, const llvm::opt::ArgList &Args, ArrayRef< std::string > ExtraTripleAliases=None)
Initialize a GCCInstallationDetector from the driver.
Definition: Gnu.cpp:1678
const MultilibSet & getMultilibs() const
Get the whole MultilibSet.
Definition: Gnu.h:232
void getMipsCPUAndABI(const llvm::opt::ArgList &Args, const llvm::Triple &Triple, StringRef &CPUName, StringRef &ABIName)
void addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Definition: Linux.cpp:880
std::vector< std::string > ExtraOpts
Definition: Linux.h:50
std::string getMipsABILibSuffix(const llvm::opt::ArgList &Args, const llvm::Triple &Triple)
StringRef getInstallPath() const
Get the detected GCC installation path.
Definition: Gnu.h:223
const Multilib & getMultilib() const
Get the detected Multilib.
Definition: Gnu.h:229
Linux(const Driver &D, const llvm::Triple &Triple, const llvm::opt::ArgList &Args)
Definition: Linux.cpp:216
std::string ResourceDir
The path to the compiler resource directory.
Definition: Driver.h:132
bool isValid() const
Check whether we detected a valid GCC install.
Definition: Gnu.h:217