clang  7.0.0svn
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"
17 #include "clang/Config/config.h"
18 #include "clang/Driver/Distro.h"
19 #include "clang/Driver/Driver.h"
20 #include "clang/Driver/Options.h"
22 #include "llvm/Option/ArgList.h"
23 #include "llvm/ProfileData/InstrProf.h"
24 #include "llvm/Support/Path.h"
25 #include "llvm/Support/ScopedPrinter.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 
48  // For most architectures, just use whatever we have rather than trying to be
49  // clever.
50  switch (TargetTriple.getArch()) {
51  default:
52  break;
53 
54  // We use the existence of '/lib/<triple>' as a directory to detect some
55  // common linux triples that don't quite match the Clang triple for both
56  // 32-bit and 64-bit targets. Multiarch fixes its install triples to these
57  // regardless of what the actual target triple is.
58  case llvm::Triple::arm:
59  case llvm::Triple::thumb:
60  if (IsAndroid) {
61  return "arm-linux-androideabi";
62  } else if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
63  if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabihf"))
64  return "arm-linux-gnueabihf";
65  } else {
66  if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabi"))
67  return "arm-linux-gnueabi";
68  }
69  break;
70  case llvm::Triple::armeb:
71  case llvm::Triple::thumbeb:
72  if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
73  if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabihf"))
74  return "armeb-linux-gnueabihf";
75  } else {
76  if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabi"))
77  return "armeb-linux-gnueabi";
78  }
79  break;
80  case llvm::Triple::x86:
81  if (IsAndroid)
82  return "i686-linux-android";
83  if (D.getVFS().exists(SysRoot + "/lib/i386-linux-gnu"))
84  return "i386-linux-gnu";
85  break;
86  case llvm::Triple::x86_64:
87  if (IsAndroid)
88  return "x86_64-linux-android";
89  // We don't want this for x32, otherwise it will match x86_64 libs
90  if (TargetEnvironment != llvm::Triple::GNUX32 &&
91  D.getVFS().exists(SysRoot + "/lib/x86_64-linux-gnu"))
92  return "x86_64-linux-gnu";
93  break;
94  case llvm::Triple::aarch64:
95  if (IsAndroid)
96  return "aarch64-linux-android";
97  if (D.getVFS().exists(SysRoot + "/lib/aarch64-linux-gnu"))
98  return "aarch64-linux-gnu";
99  break;
100  case llvm::Triple::aarch64_be:
101  if (D.getVFS().exists(SysRoot + "/lib/aarch64_be-linux-gnu"))
102  return "aarch64_be-linux-gnu";
103  break;
104  case llvm::Triple::mips:
105  if (D.getVFS().exists(SysRoot + "/lib/mips-linux-gnu"))
106  return "mips-linux-gnu";
107  break;
108  case llvm::Triple::mipsel:
109  if (IsAndroid)
110  return "mipsel-linux-android";
111  if (D.getVFS().exists(SysRoot + "/lib/mipsel-linux-gnu"))
112  return "mipsel-linux-gnu";
113  break;
114  case llvm::Triple::mips64:
115  if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnu"))
116  return "mips64-linux-gnu";
117  if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnuabi64"))
118  return "mips64-linux-gnuabi64";
119  break;
120  case llvm::Triple::mips64el:
121  if (IsAndroid)
122  return "mips64el-linux-android";
123  if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnu"))
124  return "mips64el-linux-gnu";
125  if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnuabi64"))
126  return "mips64el-linux-gnuabi64";
127  break;
128  case llvm::Triple::ppc:
129  if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnuspe"))
130  return "powerpc-linux-gnuspe";
131  if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnu"))
132  return "powerpc-linux-gnu";
133  break;
134  case llvm::Triple::ppc64:
135  if (D.getVFS().exists(SysRoot + "/lib/powerpc64-linux-gnu"))
136  return "powerpc64-linux-gnu";
137  break;
138  case llvm::Triple::ppc64le:
139  if (D.getVFS().exists(SysRoot + "/lib/powerpc64le-linux-gnu"))
140  return "powerpc64le-linux-gnu";
141  break;
142  case llvm::Triple::sparc:
143  if (D.getVFS().exists(SysRoot + "/lib/sparc-linux-gnu"))
144  return "sparc-linux-gnu";
145  break;
146  case llvm::Triple::sparcv9:
147  if (D.getVFS().exists(SysRoot + "/lib/sparc64-linux-gnu"))
148  return "sparc64-linux-gnu";
149  break;
150  case llvm::Triple::systemz:
151  if (D.getVFS().exists(SysRoot + "/lib/s390x-linux-gnu"))
152  return "s390x-linux-gnu";
153  break;
154  }
155  return TargetTriple.str();
156 }
157 
158 static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args) {
159  if (tools::isMipsArch(Triple.getArch())) {
160  if (Triple.isAndroid()) {
161  StringRef CPUName;
162  StringRef ABIName;
163  tools::mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
164  if (CPUName == "mips32r6")
165  return "libr6";
166  if (CPUName == "mips32r2")
167  return "libr2";
168  }
169  // lib32 directory has a special meaning on MIPS targets.
170  // It contains N32 ABI binaries. Use this folder if produce
171  // code for N32 ABI only.
172  if (tools::mips::hasMipsAbiArg(Args, "n32"))
173  return "lib32";
174  return Triple.isArch32Bit() ? "lib" : "lib64";
175  }
176 
177  // It happens that only x86 and PPC use the 'lib32' variant of oslibdir, and
178  // using that variant while targeting other architectures causes problems
179  // because the libraries are laid out in shared system roots that can't cope
180  // with a 'lib32' library search path being considered. So we only enable
181  // them when we know we may need it.
182  //
183  // FIXME: This is a bit of a hack. We should really unify this code for
184  // reasoning about oslibdir spellings with the lib dir spellings in the
185  // GCCInstallationDetector, but that is a more significant refactoring.
186  if (Triple.getArch() == llvm::Triple::x86 ||
187  Triple.getArch() == llvm::Triple::ppc)
188  return "lib32";
189 
190  if (Triple.getArch() == llvm::Triple::x86_64 &&
191  Triple.getEnvironment() == llvm::Triple::GNUX32)
192  return "libx32";
193 
194  if (Triple.getArch() == llvm::Triple::riscv32)
195  return "lib32";
196 
197  return Triple.isArch32Bit() ? "lib" : "lib64";
198 }
199 
200 static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs,
201  const Multilib &Multilib,
202  StringRef InstallPath,
203  ToolChain::path_list &Paths) {
204  if (const auto &PathsCallback = Multilibs.filePathsCallback())
205  for (const auto &Path : PathsCallback(Multilib))
206  addPathIfExists(D, InstallPath + Path, Paths);
207 }
208 
209 Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
210  : Generic_ELF(D, Triple, Args) {
211  GCCInstallation.init(Triple, Args);
213  llvm::Triple::ArchType Arch = Triple.getArch();
214  std::string SysRoot = computeSysRoot();
215 
216  // Cross-compiling binutils and GCC installations (vanilla and openSUSE at
217  // least) put various tools in a triple-prefixed directory off of the parent
218  // of the GCC installation. We use the GCC triple here to ensure that we end
219  // up with tools that support the same amount of cross compiling as the
220  // detected GCC installation. For example, if we find a GCC installation
221  // targeting x86_64, but it is a bi-arch GCC installation, it can also be
222  // used to target i386.
223  // FIXME: This seems unlikely to be Linux-specific.
225  PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
226  GCCInstallation.getTriple().str() + "/bin")
227  .str());
228 
229  Distro Distro(D.getVFS());
230 
231  if (Distro.IsAlpineLinux()) {
232  ExtraOpts.push_back("-z");
233  ExtraOpts.push_back("now");
234  }
235 
237  ExtraOpts.push_back("-z");
238  ExtraOpts.push_back("relro");
239  }
240 
241  if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
242  ExtraOpts.push_back("-X");
243 
244  const bool IsAndroid = Triple.isAndroid();
245  const bool IsMips = tools::isMipsArch(Arch);
246  const bool IsHexagon = Arch == llvm::Triple::hexagon;
247  const bool IsRISCV =
248  Arch == llvm::Triple::riscv32 || Arch == llvm::Triple::riscv64;
249 
250  if (IsMips && !SysRoot.empty())
251  ExtraOpts.push_back("--sysroot=" + SysRoot);
252 
253  // Do not use 'gnu' hash style for Mips targets because .gnu.hash
254  // and the MIPS ABI require .dynsym to be sorted in different ways.
255  // .gnu.hash needs symbols to be grouped by hash code whereas the MIPS
256  // ABI requires a mapping between the GOT and the symbol table.
257  // Android loader does not support .gnu.hash.
258  // Hexagon linker/loader does not support .gnu.hash
259  if (!IsMips && !IsAndroid && !IsHexagon) {
262  ExtraOpts.push_back("--hash-style=gnu");
263 
266  ExtraOpts.push_back("--hash-style=both");
267  }
268 
270  ExtraOpts.push_back("--no-add-needed");
271 
272 #ifdef ENABLE_LINKER_BUILD_ID
273  ExtraOpts.push_back("--build-id");
274 #endif
275 
276  if (IsAndroid || Distro.IsOpenSUSE())
277  ExtraOpts.push_back("--enable-new-dtags");
278 
279  // The selection of paths to try here is designed to match the patterns which
280  // the GCC driver itself uses, as this is part of the GCC-compatible driver.
281  // This was determined by running GCC in a fake filesystem, creating all
282  // possible permutations of these directories, and seeing which ones it added
283  // to the link paths.
284  path_list &Paths = getFilePaths();
285 
286  const std::string OSLibDir = getOSLibDir(Triple, Args);
287  const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
288 
289  // Add the multilib suffixed paths where they are available.
290  if (GCCInstallation.isValid()) {
291  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
292  const std::string &LibPath = GCCInstallation.getParentLibPath();
295 
296  // Add toolchain / multilib specific file paths.
297  addMultilibsFilePaths(D, Multilibs, Multilib,
299 
300  // Sourcery CodeBench MIPS toolchain holds some libraries under
301  // a biarch-like suffix of the GCC installation.
303  Paths);
304 
305  // GCC cross compiling toolchains will install target libraries which ship
306  // as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
307  // any part of the GCC installation in
308  // <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
309  // debatable, but is the reality today. We need to search this tree even
310  // when we have a sysroot somewhere else. It is the responsibility of
311  // whomever is doing the cross build targeting a sysroot using a GCC
312  // installation that is *not* within the system root to ensure two things:
313  //
314  // 1) Any DSOs that are linked in from this tree or from the install path
315  // above must be present on the system root and found via an
316  // appropriate rpath.
317  // 2) There must not be libraries installed into
318  // <prefix>/<triple>/<libdir> unless they should be preferred over
319  // those within the system root.
320  //
321  // Note that this matches the GCC behavior. See the below comment for where
322  // Clang diverges from GCC's behavior.
323  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" +
324  OSLibDir + Multilib.osSuffix(),
325  Paths);
326 
327  // If the GCC installation we found is inside of the sysroot, we want to
328  // prefer libraries installed in the parent prefix of the GCC installation.
329  // It is important to *not* use these paths when the GCC installation is
330  // outside of the system root as that can pick up unintended libraries.
331  // This usually happens when there is an external cross compiler on the
332  // host system, and a more minimal sysroot available that is the target of
333  // the cross. Note that GCC does include some of these directories in some
334  // configurations but this seems somewhere between questionable and simply
335  // a bug.
336  if (StringRef(LibPath).startswith(SysRoot)) {
337  addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths);
338  addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
339  }
340  }
341 
342  // Similar to the logic for GCC above, if we currently running Clang inside
343  // of the requested system root, add its parent library paths to
344  // those searched.
345  // FIXME: It's not clear whether we should use the driver's installed
346  // directory ('Dir' below) or the ResourceDir.
347  if (StringRef(D.Dir).startswith(SysRoot)) {
348  addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths);
349  addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths);
350  }
351 
352  addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
353  addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
354 
355  if (IsAndroid) {
356  // Android sysroots contain a library directory for each supported OS
357  // version as well as some unversioned libraries in the usual multiarch
358  // directory.
359  unsigned Major;
360  unsigned Minor;
361  unsigned Micro;
362  Triple.getEnvironmentVersion(Major, Minor, Micro);
363  addPathIfExists(D,
364  SysRoot + "/usr/lib/" + MultiarchTriple + "/" +
365  llvm::to_string(Major),
366  Paths);
367  }
368 
369  addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths);
370  addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths);
371  if (IsRISCV) {
372  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
373  addPathIfExists(D, SysRoot + "/" + OSLibDir + "/" + ABIName, Paths);
374  addPathIfExists(D, SysRoot + "/usr/" + OSLibDir + "/" + ABIName, Paths);
375  }
376 
377  // Try walking via the GCC triple path in case of biarch or multiarch GCC
378  // installations with strange symlinks.
379  if (GCCInstallation.isValid()) {
380  addPathIfExists(D,
381  SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() +
382  "/../../" + OSLibDir,
383  Paths);
384 
385  // Add the 'other' biarch variant path
386  Multilib BiarchSibling;
387  if (GCCInstallation.getBiarchSibling(BiarchSibling)) {
389  BiarchSibling.gccSuffix(),
390  Paths);
391  }
392 
393  // See comments above on the multilib variant for details of why this is
394  // included even from outside the sysroot.
395  const std::string &LibPath = GCCInstallation.getParentLibPath();
396  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
398  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" +
399  Multilib.osSuffix(),
400  Paths);
401 
402  // See comments above on the multilib variant for details of why this is
403  // only included from within the sysroot.
404  if (StringRef(LibPath).startswith(SysRoot))
405  addPathIfExists(D, LibPath, Paths);
406  }
407 
408  // Similar to the logic for GCC above, if we are currently running Clang
409  // inside of the requested system root, add its parent library path to those
410  // searched.
411  // FIXME: It's not clear whether we should use the driver's installed
412  // directory ('Dir' below) or the ResourceDir.
413  if (StringRef(D.Dir).startswith(SysRoot))
414  addPathIfExists(D, D.Dir + "/../lib", Paths);
415 
416  addPathIfExists(D, SysRoot + "/lib", Paths);
417  addPathIfExists(D, SysRoot + "/usr/lib", Paths);
418 }
419 
420 bool Linux::HasNativeLLVMSupport() const { return true; }
421 
422 Tool *Linux::buildLinker() const { return new tools::gnutools::Linker(*this); }
423 
425  return new tools::gnutools::Assembler(*this);
426 }
427 
428 std::string Linux::computeSysRoot() const {
429  if (!getDriver().SysRoot.empty())
430  return getDriver().SysRoot;
431 
432  if (getTriple().isAndroid()) {
433  // Android toolchains typically include a sysroot at ../sysroot relative to
434  // the clang binary.
435  const StringRef ClangDir = getDriver().getInstalledDir();
436  std::string AndroidSysRootPath = (ClangDir + "/../sysroot").str();
437  if (getVFS().exists(AndroidSysRootPath))
438  return AndroidSysRootPath;
439  }
440 
442  return std::string();
443 
444  // Standalone MIPS toolchains use different names for sysroot folder
445  // and put it into different places. Here we try to check some known
446  // variants.
447 
448  const StringRef InstallDir = GCCInstallation.getInstallPath();
449  const StringRef TripleStr = GCCInstallation.getTriple().str();
451 
452  std::string Path =
453  (InstallDir + "/../../../../" + TripleStr + "/libc" + Multilib.osSuffix())
454  .str();
455 
456  if (getVFS().exists(Path))
457  return Path;
458 
459  Path = (InstallDir + "/../../../../sysroot" + Multilib.osSuffix()).str();
460 
461  if (getVFS().exists(Path))
462  return Path;
463 
464  return std::string();
465 }
466 
467 std::string Linux::getDynamicLinker(const ArgList &Args) const {
468  const llvm::Triple::ArchType Arch = getArch();
469  const llvm::Triple &Triple = getTriple();
470 
471  const Distro Distro(getDriver().getVFS());
472 
473  if (Triple.isAndroid())
474  return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker";
475 
476  if (Triple.isMusl()) {
477  std::string ArchName;
478  bool IsArm = false;
479 
480  switch (Arch) {
481  case llvm::Triple::arm:
482  case llvm::Triple::thumb:
483  ArchName = "arm";
484  IsArm = true;
485  break;
486  case llvm::Triple::armeb:
487  case llvm::Triple::thumbeb:
488  ArchName = "armeb";
489  IsArm = true;
490  break;
491  default:
492  ArchName = Triple.getArchName().str();
493  }
494  if (IsArm &&
495  (Triple.getEnvironment() == llvm::Triple::MuslEABIHF ||
497  ArchName += "hf";
498 
499  return "/lib/ld-musl-" + ArchName + ".so.1";
500  }
501 
502  std::string LibDir;
503  std::string Loader;
504 
505  switch (Arch) {
506  default:
507  llvm_unreachable("unsupported architecture");
508 
509  case llvm::Triple::aarch64:
510  LibDir = "lib";
511  Loader = "ld-linux-aarch64.so.1";
512  break;
513  case llvm::Triple::aarch64_be:
514  LibDir = "lib";
515  Loader = "ld-linux-aarch64_be.so.1";
516  break;
517  case llvm::Triple::arm:
518  case llvm::Triple::thumb:
519  case llvm::Triple::armeb:
520  case llvm::Triple::thumbeb: {
521  const bool HF =
522  Triple.getEnvironment() == llvm::Triple::GNUEABIHF ||
524 
525  LibDir = "lib";
526  Loader = HF ? "ld-linux-armhf.so.3" : "ld-linux.so.3";
527  break;
528  }
529  case llvm::Triple::mips:
530  case llvm::Triple::mipsel:
531  case llvm::Triple::mips64:
532  case llvm::Triple::mips64el: {
533  bool LE = (Triple.getArch() == llvm::Triple::mipsel) ||
534  (Triple.getArch() == llvm::Triple::mips64el);
535  bool IsNaN2008 = tools::mips::isNaN2008(Args, Triple);
536 
537  LibDir = "lib" + tools::mips::getMipsABILibSuffix(Args, Triple);
538 
539  if (tools::mips::isUCLibc(Args))
540  Loader = IsNaN2008 ? "ld-uClibc-mipsn8.so.0" : "ld-uClibc.so.0";
541  else if (!Triple.hasEnvironment() &&
542  Triple.getVendor() == llvm::Triple::VendorType::MipsTechnologies)
543  Loader = LE ? "ld-musl-mipsel.so.1" : "ld-musl-mips.so.1";
544  else
545  Loader = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1";
546 
547  break;
548  }
549  case llvm::Triple::ppc:
550  LibDir = "lib";
551  Loader = "ld.so.1";
552  break;
553  case llvm::Triple::ppc64:
554  LibDir = "lib64";
555  Loader =
556  (tools::ppc::hasPPCAbiArg(Args, "elfv2")) ? "ld64.so.2" : "ld64.so.1";
557  break;
558  case llvm::Triple::ppc64le:
559  LibDir = "lib64";
560  Loader =
561  (tools::ppc::hasPPCAbiArg(Args, "elfv1")) ? "ld64.so.1" : "ld64.so.2";
562  break;
563  case llvm::Triple::riscv32: {
564  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
565  LibDir = "lib";
566  Loader = ("ld-linux-riscv32-" + ABIName + ".so.1").str();
567  break;
568  }
569  case llvm::Triple::riscv64: {
570  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
571  LibDir = "lib";
572  Loader = ("ld-linux-riscv64-" + ABIName + ".so.1").str();
573  break;
574  }
575  case llvm::Triple::sparc:
576  case llvm::Triple::sparcel:
577  LibDir = "lib";
578  Loader = "ld-linux.so.2";
579  break;
580  case llvm::Triple::sparcv9:
581  LibDir = "lib64";
582  Loader = "ld-linux.so.2";
583  break;
584  case llvm::Triple::systemz:
585  LibDir = "lib";
586  Loader = "ld64.so.1";
587  break;
588  case llvm::Triple::x86:
589  LibDir = "lib";
590  Loader = "ld-linux.so.2";
591  break;
592  case llvm::Triple::x86_64: {
593  bool X32 = Triple.getEnvironment() == llvm::Triple::GNUX32;
594 
595  LibDir = X32 ? "libx32" : "lib64";
596  Loader = X32 ? "ld-linux-x32.so.2" : "ld-linux-x86-64.so.2";
597  break;
598  }
599  }
600 
601  if (Distro == Distro::Exherbo && (Triple.getVendor() == llvm::Triple::UnknownVendor ||
602  Triple.getVendor() == llvm::Triple::PC))
603  return "/usr/" + Triple.str() + "/lib/" + Loader;
604  return "/" + LibDir + "/" + Loader;
605 }
606 
607 void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
608  ArgStringList &CC1Args) const {
609  const Driver &D = getDriver();
610  std::string SysRoot = computeSysRoot();
611 
612  if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
613  return;
614 
615  if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
616  addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include");
617 
618  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
620  llvm::sys::path::append(P, "include");
621  addSystemInclude(DriverArgs, CC1Args, P);
622  }
623 
624  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
625  return;
626 
627  // Check for configure-time C include directories.
628  StringRef CIncludeDirs(C_INCLUDE_DIRS);
629  if (CIncludeDirs != "") {
631  CIncludeDirs.split(dirs, ":");
632  for (StringRef dir : dirs) {
633  StringRef Prefix =
634  llvm::sys::path::is_absolute(dir) ? StringRef(SysRoot) : "";
635  addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
636  }
637  return;
638  }
639 
640  // Lacking those, try to detect the correct set of system includes for the
641  // target triple.
642 
643  // Add include directories specific to the selected multilib set and multilib.
644  if (GCCInstallation.isValid()) {
645  const auto &Callback = Multilibs.includeDirsCallback();
646  if (Callback) {
647  for (const auto &Path : Callback(GCCInstallation.getMultilib()))
649  DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path);
650  }
651  }
652 
653  // Implement generic Debian multiarch support.
654  const StringRef X86_64MultiarchIncludeDirs[] = {
655  "/usr/include/x86_64-linux-gnu",
656 
657  // FIXME: These are older forms of multiarch. It's not clear that they're
658  // in use in any released version of Debian, so we should consider
659  // removing them.
660  "/usr/include/i686-linux-gnu/64", "/usr/include/i486-linux-gnu/64"};
661  const StringRef X86MultiarchIncludeDirs[] = {
662  "/usr/include/i386-linux-gnu",
663 
664  // FIXME: These are older forms of multiarch. It's not clear that they're
665  // in use in any released version of Debian, so we should consider
666  // removing them.
667  "/usr/include/x86_64-linux-gnu/32", "/usr/include/i686-linux-gnu",
668  "/usr/include/i486-linux-gnu"};
669  const StringRef AArch64MultiarchIncludeDirs[] = {
670  "/usr/include/aarch64-linux-gnu"};
671  const StringRef ARMMultiarchIncludeDirs[] = {
672  "/usr/include/arm-linux-gnueabi"};
673  const StringRef ARMHFMultiarchIncludeDirs[] = {
674  "/usr/include/arm-linux-gnueabihf"};
675  const StringRef ARMEBMultiarchIncludeDirs[] = {
676  "/usr/include/armeb-linux-gnueabi"};
677  const StringRef ARMEBHFMultiarchIncludeDirs[] = {
678  "/usr/include/armeb-linux-gnueabihf"};
679  const StringRef MIPSMultiarchIncludeDirs[] = {"/usr/include/mips-linux-gnu"};
680  const StringRef MIPSELMultiarchIncludeDirs[] = {
681  "/usr/include/mipsel-linux-gnu"};
682  const StringRef MIPS64MultiarchIncludeDirs[] = {
683  "/usr/include/mips64-linux-gnu", "/usr/include/mips64-linux-gnuabi64"};
684  const StringRef MIPS64ELMultiarchIncludeDirs[] = {
685  "/usr/include/mips64el-linux-gnu",
686  "/usr/include/mips64el-linux-gnuabi64"};
687  const StringRef PPCMultiarchIncludeDirs[] = {
688  "/usr/include/powerpc-linux-gnu"};
689  const StringRef PPC64MultiarchIncludeDirs[] = {
690  "/usr/include/powerpc64-linux-gnu"};
691  const StringRef PPC64LEMultiarchIncludeDirs[] = {
692  "/usr/include/powerpc64le-linux-gnu"};
693  const StringRef SparcMultiarchIncludeDirs[] = {
694  "/usr/include/sparc-linux-gnu"};
695  const StringRef Sparc64MultiarchIncludeDirs[] = {
696  "/usr/include/sparc64-linux-gnu"};
697  const StringRef SYSTEMZMultiarchIncludeDirs[] = {
698  "/usr/include/s390x-linux-gnu"};
699  ArrayRef<StringRef> MultiarchIncludeDirs;
700  switch (getTriple().getArch()) {
701  case llvm::Triple::x86_64:
702  MultiarchIncludeDirs = X86_64MultiarchIncludeDirs;
703  break;
704  case llvm::Triple::x86:
705  MultiarchIncludeDirs = X86MultiarchIncludeDirs;
706  break;
707  case llvm::Triple::aarch64:
708  case llvm::Triple::aarch64_be:
709  MultiarchIncludeDirs = AArch64MultiarchIncludeDirs;
710  break;
711  case llvm::Triple::arm:
712  case llvm::Triple::thumb:
713  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
714  MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs;
715  else
716  MultiarchIncludeDirs = ARMMultiarchIncludeDirs;
717  break;
718  case llvm::Triple::armeb:
719  case llvm::Triple::thumbeb:
720  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
721  MultiarchIncludeDirs = ARMEBHFMultiarchIncludeDirs;
722  else
723  MultiarchIncludeDirs = ARMEBMultiarchIncludeDirs;
724  break;
725  case llvm::Triple::mips:
726  MultiarchIncludeDirs = MIPSMultiarchIncludeDirs;
727  break;
728  case llvm::Triple::mipsel:
729  MultiarchIncludeDirs = MIPSELMultiarchIncludeDirs;
730  break;
731  case llvm::Triple::mips64:
732  MultiarchIncludeDirs = MIPS64MultiarchIncludeDirs;
733  break;
734  case llvm::Triple::mips64el:
735  MultiarchIncludeDirs = MIPS64ELMultiarchIncludeDirs;
736  break;
737  case llvm::Triple::ppc:
738  MultiarchIncludeDirs = PPCMultiarchIncludeDirs;
739  break;
740  case llvm::Triple::ppc64:
741  MultiarchIncludeDirs = PPC64MultiarchIncludeDirs;
742  break;
743  case llvm::Triple::ppc64le:
744  MultiarchIncludeDirs = PPC64LEMultiarchIncludeDirs;
745  break;
746  case llvm::Triple::sparc:
747  MultiarchIncludeDirs = SparcMultiarchIncludeDirs;
748  break;
749  case llvm::Triple::sparcv9:
750  MultiarchIncludeDirs = Sparc64MultiarchIncludeDirs;
751  break;
752  case llvm::Triple::systemz:
753  MultiarchIncludeDirs = SYSTEMZMultiarchIncludeDirs;
754  break;
755  default:
756  break;
757  }
758 
759  const std::string AndroidMultiarchIncludeDir =
760  std::string("/usr/include/") +
761  getMultiarchTriple(D, getTriple(), SysRoot);
762  const StringRef AndroidMultiarchIncludeDirs[] = {AndroidMultiarchIncludeDir};
763  if (getTriple().isAndroid())
764  MultiarchIncludeDirs = AndroidMultiarchIncludeDirs;
765 
766  for (StringRef Dir : MultiarchIncludeDirs) {
767  if (D.getVFS().exists(SysRoot + Dir)) {
768  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + Dir);
769  break;
770  }
771  }
772 
773  if (getTriple().getOS() == llvm::Triple::RTEMS)
774  return;
775 
776  // Add an include of '/include' directly. This isn't provided by default by
777  // system GCCs, but is often used with cross-compiling GCCs, and harmless to
778  // add even when Clang is acting as-if it were a system compiler.
779  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include");
780 
781  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include");
782 }
783 
784 static std::string DetectLibcxxIncludePath(StringRef base) {
785  std::error_code EC;
786  int MaxVersion = 0;
787  std::string MaxVersionString = "";
788  for (llvm::sys::fs::directory_iterator LI(base, EC), LE; !EC && LI != LE;
789  LI = LI.increment(EC)) {
790  StringRef VersionText = llvm::sys::path::filename(LI->path());
791  int Version;
792  if (VersionText[0] == 'v' &&
793  !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) {
794  if (Version > MaxVersion) {
795  MaxVersion = Version;
796  MaxVersionString = VersionText;
797  }
798  }
799  }
800  return MaxVersion ? (base + "/" + MaxVersionString).str() : "";
801 }
802 
803 void Linux::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
804  llvm::opt::ArgStringList &CC1Args) const {
805  const std::string& SysRoot = computeSysRoot();
806  const std::string LibCXXIncludePathCandidates[] = {
807  DetectLibcxxIncludePath(getDriver().Dir + "/../include/c++"),
808  // If this is a development, non-installed, clang, libcxx will
809  // not be found at ../include/c++ but it likely to be found at
810  // one of the following two locations:
811  DetectLibcxxIncludePath(SysRoot + "/usr/local/include/c++"),
812  DetectLibcxxIncludePath(SysRoot + "/usr/include/c++") };
813  for (const auto &IncludePath : LibCXXIncludePathCandidates) {
814  if (IncludePath.empty() || !getVFS().exists(IncludePath))
815  continue;
816  // Use the first candidate that exists.
817  addSystemInclude(DriverArgs, CC1Args, IncludePath);
818  return;
819  }
820 }
821 
822 void Linux::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
823  llvm::opt::ArgStringList &CC1Args) const {
824  // We need a detected GCC installation on Linux to provide libstdc++'s
825  // headers.
826  if (!GCCInstallation.isValid())
827  return;
828 
829  // By default, look for the C++ headers in an include directory adjacent to
830  // the lib directory of the GCC installation. Note that this is expect to be
831  // equivalent to '/usr/include/c++/X.Y' in almost all cases.
832  StringRef LibDir = GCCInstallation.getParentLibPath();
833  StringRef InstallDir = GCCInstallation.getInstallPath();
834  StringRef TripleStr = GCCInstallation.getTriple().str();
836  const std::string GCCMultiarchTriple = getMultiarchTriple(
838  const std::string TargetMultiarchTriple =
840  const GCCVersion &Version = GCCInstallation.getVersion();
841 
842  // The primary search for libstdc++ supports multiarch variants.
843  if (addLibStdCXXIncludePaths(LibDir.str() + "/../include",
844  "/c++/" + Version.Text, TripleStr,
845  GCCMultiarchTriple, TargetMultiarchTriple,
846  Multilib.includeSuffix(), DriverArgs, CC1Args))
847  return;
848 
849  // Otherwise, fall back on a bunch of options which don't use multiarch
850  // layouts for simplicity.
851  const std::string LibStdCXXIncludePathCandidates[] = {
852  // Gentoo is weird and places its headers inside the GCC install,
853  // so if the first attempt to find the headers fails, try these patterns.
854  InstallDir.str() + "/include/g++-v" + Version.Text,
855  InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." +
856  Version.MinorStr,
857  InstallDir.str() + "/include/g++-v" + Version.MajorStr,
858  // Android standalone toolchain has C++ headers in yet another place.
859  LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
860  // Freescale SDK C++ headers are directly in <sysroot>/usr/include/c++,
861  // without a subdirectory corresponding to the gcc version.
862  LibDir.str() + "/../include/c++",
863  };
864 
865  for (const auto &IncludePath : LibStdCXXIncludePathCandidates) {
866  if (addLibStdCXXIncludePaths(IncludePath, /*Suffix*/ "", TripleStr,
867  /*GCCMultiarchTriple*/ "",
868  /*TargetMultiarchTriple*/ "",
869  Multilib.includeSuffix(), DriverArgs, CC1Args))
870  break;
871  }
872 }
873 
874 void Linux::AddCudaIncludeArgs(const ArgList &DriverArgs,
875  ArgStringList &CC1Args) const {
876  CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
877 }
878 
879 void Linux::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
880  ArgStringList &CC1Args) const {
881  if (GCCInstallation.isValid()) {
882  CC1Args.push_back("-isystem");
883  CC1Args.push_back(DriverArgs.MakeArgString(
884  GCCInstallation.getParentLibPath() + "/../" +
885  GCCInstallation.getTriple().str() + "/include"));
886  }
887 }
888 
889 bool Linux::isPIEDefault() const {
890  return (getTriple().isAndroid() && !getTriple().isAndroidVersionLT(16)) ||
891  getTriple().isMusl() || getSanitizerArgs().requiresPIE();
892 }
893 
895  const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
896  const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
897  const bool IsMIPS = getTriple().getArch() == llvm::Triple::mips ||
898  getTriple().getArch() == llvm::Triple::mipsel;
899  const bool IsMIPS64 = getTriple().getArch() == llvm::Triple::mips64 ||
900  getTriple().getArch() == llvm::Triple::mips64el;
901  const bool IsPowerPC64 = getTriple().getArch() == llvm::Triple::ppc64 ||
902  getTriple().getArch() == llvm::Triple::ppc64le;
903  const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64 ||
904  getTriple().getArch() == llvm::Triple::aarch64_be;
905  const bool IsArmArch = getTriple().getArch() == llvm::Triple::arm ||
906  getTriple().getArch() == llvm::Triple::thumb ||
907  getTriple().getArch() == llvm::Triple::armeb ||
908  getTriple().getArch() == llvm::Triple::thumbeb;
910  Res |= SanitizerKind::Address;
911  Res |= SanitizerKind::Fuzzer;
912  Res |= SanitizerKind::FuzzerNoLink;
913  Res |= SanitizerKind::KernelAddress;
914  Res |= SanitizerKind::Memory;
915  Res |= SanitizerKind::Vptr;
916  Res |= SanitizerKind::SafeStack;
917  if (IsX86_64 || IsMIPS64 || IsAArch64)
918  Res |= SanitizerKind::DataFlow;
919  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsArmArch || IsPowerPC64)
920  Res |= SanitizerKind::Leak;
921  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64)
922  Res |= SanitizerKind::Thread;
923  if (IsX86_64 || IsMIPS64)
924  Res |= SanitizerKind::Efficiency;
925  if (IsX86 || IsX86_64)
926  Res |= SanitizerKind::Function;
927  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch)
928  Res |= SanitizerKind::Scudo;
929  if (IsX86_64 || IsAArch64) {
930  Res |= SanitizerKind::HWAddress;
931  Res |= SanitizerKind::KernelHWAddress;
932  }
933  return Res;
934 }
935 
936 void Linux::addProfileRTLibs(const llvm::opt::ArgList &Args,
937  llvm::opt::ArgStringList &CmdArgs) const {
938  if (!needsProfileRT(Args)) return;
939 
940  // Add linker option -u__llvm_runtime_variable to cause runtime
941  // initialization module to be linked in.
942  if (!Args.hasArg(options::OPT_coverage))
943  CmdArgs.push_back(Args.MakeArgString(
944  Twine("-u", llvm::getInstrProfRuntimeHookVarName())));
945  ToolChain::addProfileRTLibs(Args, CmdArgs);
946 }
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:689
bool isPIEDefault() const override
Test whether this toolchain defaults to PIE.
Definition: Linux.cpp:889
virtual std::string getDynamicLinker(const llvm::opt::ArgList &Args) const
Definition: Linux.cpp:467
static void addExternCSystemIncludeIfExists(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Definition: ToolChain.cpp:696
bool getBiarchSibling(Multilib &M) const
Get the biarch sibling multilib (if it exists).
Definition: Gnu.cpp:1761
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:894
StringRef getOS() const
Definition: ToolChain.h:200
bool IsOpenSUSE() const
Definition: Distro.h:109
const IncludeDirsFunc & filePathsCallback() const
Definition: Multilib.h:182
void addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Definition: Linux.cpp:822
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:629
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:874
GCCInstallationDetector GCCInstallation
Definition: Gnu.h:280
path_list & getProgramPaths()
Definition: ToolChain.h:219
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:420
std::string Dir
The path the driver executable was in, as invoked from the command line.
Definition: Driver.h:121
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:158
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:381
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:784
vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:90
path_list & getFilePaths()
Definition: ToolChain.h:216
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:59
bool hasMipsAbiArg(const llvm::opt::ArgList &Args, const char *Value)
const GCCVersion & getVersion() const
Get the detected GCC version string.
Definition: Gnu.h:239
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:607
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:936
This corresponds to a single GCC Multilib, or a segment of one controlled by a command line flag...
Definition: Multilib.h:29
bool IsDebian() const
Definition: Distro.h:113
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:197
void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
Definition: Cuda.cpp:229
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:879
vfs::FileSystem & getVFS() const
Definition: Driver.h:301
const Driver & getDriver() const
Definition: ToolChain.h:181
bool hasPPCAbiArg(const llvm::opt::ArgList &Args, const char *Value)
bool isMipsArch(llvm::Triple::ArchType Arch)
Definition: Mips.cpp:23
bool isUCLibc(const llvm::opt::ArgList &Args)
virtual std::string computeSysRoot() const
Definition: Linux.cpp:428
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:674
StringRef getParentLibPath() const
Get the detected GCC parent lib path.
Definition: Gnu.h:226
bool IsAlpineLinux() const
Definition: Distro.h:121
static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs, const Multilib &Multilib, StringRef InstallPath, ToolChain::path_list &Paths)
Definition: Linux.cpp:200
Dataflow Directional Tag Classes.
std::string SysRoot
sysroot, if present
Definition: Driver.h:149
Tool - Information on a specific compilation tool.
Definition: Tool.h:34
Defines the virtual file system interface vfs::FileSystem.
const SanitizerArgs & getSanitizerArgs() const
Definition: ToolChain.cpp:102
const char * getInstalledDir() const
Get the path to where the clang executable was installed.
Definition: Driver.h:320
bool exists(const Twine &Path)
Check whether a file exists. Provided for convenience.
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:422
const llvm::Triple & getTriple() const
Definition: ToolChain.h:183
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:786
bool IsRedhat() const
Definition: Distro.h:105
bool IsUbuntu() const
Definition: Distro.h:117
void addPathIfExists(const Driver &D, const Twine &Path, ToolChain::path_list &Paths)
Definition: CommonArgs.cpp:61
Tool * buildAssembler() const override
Definition: Linux.cpp:424
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:2469
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:1653
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:803
std::vector< std::string > ExtraOpts
Definition: Linux.h:48
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:209
std::string ResourceDir
The path to the compiler resource directory.
Definition: Driver.h:133
bool isValid() const
Check whether we detected a valid GCC install.
Definition: Gnu.h:217