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 (Triple.isMIPS()) {
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 (GCCInstallation.getParentLibPath().find("opt/rh/devtoolset") !=
242  StringRef::npos)
243  // With devtoolset on RHEL, we want to add a bin directory that is relative
244  // to the detected gcc install, because if we are using devtoolset gcc then
245  // we want to use other tools from devtoolset (e.g. ld) instead of the
246  // standard system tools.
247  PPaths.push_back(Twine(GCCInstallation.getParentLibPath() +
248  "/../bin").str());
249 
250  if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
251  ExtraOpts.push_back("-X");
252 
253  const bool IsAndroid = Triple.isAndroid();
254  const bool IsMips = Triple.isMIPS();
255  const bool IsHexagon = Arch == llvm::Triple::hexagon;
256  const bool IsRISCV =
257  Arch == llvm::Triple::riscv32 || Arch == llvm::Triple::riscv64;
258 
259  if (IsMips && !SysRoot.empty())
260  ExtraOpts.push_back("--sysroot=" + SysRoot);
261 
262  // Do not use 'gnu' hash style for Mips targets because .gnu.hash
263  // and the MIPS ABI require .dynsym to be sorted in different ways.
264  // .gnu.hash needs symbols to be grouped by hash code whereas the MIPS
265  // ABI requires a mapping between the GOT and the symbol table.
266  // Android loader does not support .gnu.hash.
267  // Hexagon linker/loader does not support .gnu.hash
268  if (!IsMips && !IsAndroid && !IsHexagon) {
271  ExtraOpts.push_back("--hash-style=gnu");
272 
275  ExtraOpts.push_back("--hash-style=both");
276  }
277 
279  ExtraOpts.push_back("--no-add-needed");
280 
281 #ifdef ENABLE_LINKER_BUILD_ID
282  ExtraOpts.push_back("--build-id");
283 #endif
284 
285  if (IsAndroid || Distro.IsOpenSUSE())
286  ExtraOpts.push_back("--enable-new-dtags");
287 
288  // The selection of paths to try here is designed to match the patterns which
289  // the GCC driver itself uses, as this is part of the GCC-compatible driver.
290  // This was determined by running GCC in a fake filesystem, creating all
291  // possible permutations of these directories, and seeing which ones it added
292  // to the link paths.
293  path_list &Paths = getFilePaths();
294 
295  const std::string OSLibDir = getOSLibDir(Triple, Args);
296  const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
297 
298  // Add the multilib suffixed paths where they are available.
299  if (GCCInstallation.isValid()) {
300  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
301  const std::string &LibPath = GCCInstallation.getParentLibPath();
304 
305  // Add toolchain / multilib specific file paths.
306  addMultilibsFilePaths(D, Multilibs, Multilib,
308 
309  // Sourcery CodeBench MIPS toolchain holds some libraries under
310  // a biarch-like suffix of the GCC installation.
312  Paths);
313 
314  // GCC cross compiling toolchains will install target libraries which ship
315  // as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
316  // any part of the GCC installation in
317  // <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
318  // debatable, but is the reality today. We need to search this tree even
319  // when we have a sysroot somewhere else. It is the responsibility of
320  // whomever is doing the cross build targeting a sysroot using a GCC
321  // installation that is *not* within the system root to ensure two things:
322  //
323  // 1) Any DSOs that are linked in from this tree or from the install path
324  // above must be present on the system root and found via an
325  // appropriate rpath.
326  // 2) There must not be libraries installed into
327  // <prefix>/<triple>/<libdir> unless they should be preferred over
328  // those within the system root.
329  //
330  // Note that this matches the GCC behavior. See the below comment for where
331  // Clang diverges from GCC's behavior.
332  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" +
333  OSLibDir + Multilib.osSuffix(),
334  Paths);
335 
336  // If the GCC installation we found is inside of the sysroot, we want to
337  // prefer libraries installed in the parent prefix of the GCC installation.
338  // It is important to *not* use these paths when the GCC installation is
339  // outside of the system root as that can pick up unintended libraries.
340  // This usually happens when there is an external cross compiler on the
341  // host system, and a more minimal sysroot available that is the target of
342  // the cross. Note that GCC does include some of these directories in some
343  // configurations but this seems somewhere between questionable and simply
344  // a bug.
345  if (StringRef(LibPath).startswith(SysRoot)) {
346  addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths);
347  addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
348  }
349  }
350 
351  // Similar to the logic for GCC above, if we currently running Clang inside
352  // of the requested system root, add its parent library paths to
353  // those searched.
354  // FIXME: It's not clear whether we should use the driver's installed
355  // directory ('Dir' below) or the ResourceDir.
356  if (StringRef(D.Dir).startswith(SysRoot)) {
357  addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths);
358  addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths);
359  }
360 
361  addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
362  addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
363 
364  if (IsAndroid) {
365  // Android sysroots contain a library directory for each supported OS
366  // version as well as some unversioned libraries in the usual multiarch
367  // directory.
368  unsigned Major;
369  unsigned Minor;
370  unsigned Micro;
371  Triple.getEnvironmentVersion(Major, Minor, Micro);
372  addPathIfExists(D,
373  SysRoot + "/usr/lib/" + MultiarchTriple + "/" +
374  llvm::to_string(Major),
375  Paths);
376  }
377 
378  addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths);
379  addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths);
380  if (IsRISCV) {
381  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
382  addPathIfExists(D, SysRoot + "/" + OSLibDir + "/" + ABIName, Paths);
383  addPathIfExists(D, SysRoot + "/usr/" + OSLibDir + "/" + ABIName, Paths);
384  }
385 
386  // Try walking via the GCC triple path in case of biarch or multiarch GCC
387  // installations with strange symlinks.
388  if (GCCInstallation.isValid()) {
389  addPathIfExists(D,
390  SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() +
391  "/../../" + OSLibDir,
392  Paths);
393 
394  // Add the 'other' biarch variant path
395  Multilib BiarchSibling;
396  if (GCCInstallation.getBiarchSibling(BiarchSibling)) {
398  BiarchSibling.gccSuffix(),
399  Paths);
400  }
401 
402  // See comments above on the multilib variant for details of why this is
403  // included even from outside the sysroot.
404  const std::string &LibPath = GCCInstallation.getParentLibPath();
405  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
407  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" +
408  Multilib.osSuffix(),
409  Paths);
410 
411  // See comments above on the multilib variant for details of why this is
412  // only included from within the sysroot.
413  if (StringRef(LibPath).startswith(SysRoot))
414  addPathIfExists(D, LibPath, Paths);
415  }
416 
417  // Similar to the logic for GCC above, if we are currently running Clang
418  // inside of the requested system root, add its parent library path to those
419  // searched.
420  // FIXME: It's not clear whether we should use the driver's installed
421  // directory ('Dir' below) or the ResourceDir.
422  if (StringRef(D.Dir).startswith(SysRoot))
423  addPathIfExists(D, D.Dir + "/../lib", Paths);
424 
425  addPathIfExists(D, SysRoot + "/lib", Paths);
426  addPathIfExists(D, SysRoot + "/usr/lib", Paths);
427 }
428 
429 bool Linux::HasNativeLLVMSupport() const { return true; }
430 
431 Tool *Linux::buildLinker() const { return new tools::gnutools::Linker(*this); }
432 
434  return new tools::gnutools::Assembler(*this);
435 }
436 
437 std::string Linux::computeSysRoot() const {
438  if (!getDriver().SysRoot.empty())
439  return getDriver().SysRoot;
440 
441  if (getTriple().isAndroid()) {
442  // Android toolchains typically include a sysroot at ../sysroot relative to
443  // the clang binary.
444  const StringRef ClangDir = getDriver().getInstalledDir();
445  std::string AndroidSysRootPath = (ClangDir + "/../sysroot").str();
446  if (getVFS().exists(AndroidSysRootPath))
447  return AndroidSysRootPath;
448  }
449 
450  if (!GCCInstallation.isValid() || !getTriple().isMIPS())
451  return std::string();
452 
453  // Standalone MIPS toolchains use different names for sysroot folder
454  // and put it into different places. Here we try to check some known
455  // variants.
456 
457  const StringRef InstallDir = GCCInstallation.getInstallPath();
458  const StringRef TripleStr = GCCInstallation.getTriple().str();
460 
461  std::string Path =
462  (InstallDir + "/../../../../" + TripleStr + "/libc" + Multilib.osSuffix())
463  .str();
464 
465  if (getVFS().exists(Path))
466  return Path;
467 
468  Path = (InstallDir + "/../../../../sysroot" + Multilib.osSuffix()).str();
469 
470  if (getVFS().exists(Path))
471  return Path;
472 
473  return std::string();
474 }
475 
476 std::string Linux::getDynamicLinker(const ArgList &Args) const {
477  const llvm::Triple::ArchType Arch = getArch();
478  const llvm::Triple &Triple = getTriple();
479 
480  const Distro Distro(getDriver().getVFS());
481 
482  if (Triple.isAndroid())
483  return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker";
484 
485  if (Triple.isMusl()) {
486  std::string ArchName;
487  bool IsArm = false;
488 
489  switch (Arch) {
490  case llvm::Triple::arm:
491  case llvm::Triple::thumb:
492  ArchName = "arm";
493  IsArm = true;
494  break;
495  case llvm::Triple::armeb:
496  case llvm::Triple::thumbeb:
497  ArchName = "armeb";
498  IsArm = true;
499  break;
500  default:
501  ArchName = Triple.getArchName().str();
502  }
503  if (IsArm &&
504  (Triple.getEnvironment() == llvm::Triple::MuslEABIHF ||
506  ArchName += "hf";
507 
508  return "/lib/ld-musl-" + ArchName + ".so.1";
509  }
510 
511  std::string LibDir;
512  std::string Loader;
513 
514  switch (Arch) {
515  default:
516  llvm_unreachable("unsupported architecture");
517 
518  case llvm::Triple::aarch64:
519  LibDir = "lib";
520  Loader = "ld-linux-aarch64.so.1";
521  break;
522  case llvm::Triple::aarch64_be:
523  LibDir = "lib";
524  Loader = "ld-linux-aarch64_be.so.1";
525  break;
526  case llvm::Triple::arm:
527  case llvm::Triple::thumb:
528  case llvm::Triple::armeb:
529  case llvm::Triple::thumbeb: {
530  const bool HF =
531  Triple.getEnvironment() == llvm::Triple::GNUEABIHF ||
533 
534  LibDir = "lib";
535  Loader = HF ? "ld-linux-armhf.so.3" : "ld-linux.so.3";
536  break;
537  }
538  case llvm::Triple::mips:
539  case llvm::Triple::mipsel:
540  case llvm::Triple::mips64:
541  case llvm::Triple::mips64el: {
542  bool IsNaN2008 = tools::mips::isNaN2008(Args, Triple);
543 
544  LibDir = "lib" + tools::mips::getMipsABILibSuffix(Args, Triple);
545 
546  if (tools::mips::isUCLibc(Args))
547  Loader = IsNaN2008 ? "ld-uClibc-mipsn8.so.0" : "ld-uClibc.so.0";
548  else if (!Triple.hasEnvironment() &&
549  Triple.getVendor() == llvm::Triple::VendorType::MipsTechnologies)
550  Loader =
551  Triple.isLittleEndian() ? "ld-musl-mipsel.so.1" : "ld-musl-mips.so.1";
552  else
553  Loader = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1";
554 
555  break;
556  }
557  case llvm::Triple::ppc:
558  LibDir = "lib";
559  Loader = "ld.so.1";
560  break;
561  case llvm::Triple::ppc64:
562  LibDir = "lib64";
563  Loader =
564  (tools::ppc::hasPPCAbiArg(Args, "elfv2")) ? "ld64.so.2" : "ld64.so.1";
565  break;
566  case llvm::Triple::ppc64le:
567  LibDir = "lib64";
568  Loader =
569  (tools::ppc::hasPPCAbiArg(Args, "elfv1")) ? "ld64.so.1" : "ld64.so.2";
570  break;
571  case llvm::Triple::riscv32: {
572  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
573  LibDir = "lib";
574  Loader = ("ld-linux-riscv32-" + ABIName + ".so.1").str();
575  break;
576  }
577  case llvm::Triple::riscv64: {
578  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
579  LibDir = "lib";
580  Loader = ("ld-linux-riscv64-" + ABIName + ".so.1").str();
581  break;
582  }
583  case llvm::Triple::sparc:
584  case llvm::Triple::sparcel:
585  LibDir = "lib";
586  Loader = "ld-linux.so.2";
587  break;
588  case llvm::Triple::sparcv9:
589  LibDir = "lib64";
590  Loader = "ld-linux.so.2";
591  break;
592  case llvm::Triple::systemz:
593  LibDir = "lib";
594  Loader = "ld64.so.1";
595  break;
596  case llvm::Triple::x86:
597  LibDir = "lib";
598  Loader = "ld-linux.so.2";
599  break;
600  case llvm::Triple::x86_64: {
601  bool X32 = Triple.getEnvironment() == llvm::Triple::GNUX32;
602 
603  LibDir = X32 ? "libx32" : "lib64";
604  Loader = X32 ? "ld-linux-x32.so.2" : "ld-linux-x86-64.so.2";
605  break;
606  }
607  }
608 
609  if (Distro == Distro::Exherbo && (Triple.getVendor() == llvm::Triple::UnknownVendor ||
610  Triple.getVendor() == llvm::Triple::PC))
611  return "/usr/" + Triple.str() + "/lib/" + Loader;
612  return "/" + LibDir + "/" + Loader;
613 }
614 
615 void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
616  ArgStringList &CC1Args) const {
617  const Driver &D = getDriver();
618  std::string SysRoot = computeSysRoot();
619 
620  if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
621  return;
622 
623  if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
624  addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include");
625 
626  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
628  llvm::sys::path::append(P, "include");
629  addSystemInclude(DriverArgs, CC1Args, P);
630  }
631 
632  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
633  return;
634 
635  // Check for configure-time C include directories.
636  StringRef CIncludeDirs(C_INCLUDE_DIRS);
637  if (CIncludeDirs != "") {
639  CIncludeDirs.split(dirs, ":");
640  for (StringRef dir : dirs) {
641  StringRef Prefix =
642  llvm::sys::path::is_absolute(dir) ? StringRef(SysRoot) : "";
643  addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
644  }
645  return;
646  }
647 
648  // Lacking those, try to detect the correct set of system includes for the
649  // target triple.
650 
651  // Add include directories specific to the selected multilib set and multilib.
652  if (GCCInstallation.isValid()) {
653  const auto &Callback = Multilibs.includeDirsCallback();
654  if (Callback) {
655  for (const auto &Path : Callback(GCCInstallation.getMultilib()))
657  DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path);
658  }
659  }
660 
661  // Implement generic Debian multiarch support.
662  const StringRef X86_64MultiarchIncludeDirs[] = {
663  "/usr/include/x86_64-linux-gnu",
664 
665  // FIXME: These are older forms of multiarch. It's not clear that they're
666  // in use in any released version of Debian, so we should consider
667  // removing them.
668  "/usr/include/i686-linux-gnu/64", "/usr/include/i486-linux-gnu/64"};
669  const StringRef X86MultiarchIncludeDirs[] = {
670  "/usr/include/i386-linux-gnu",
671 
672  // FIXME: These are older forms of multiarch. It's not clear that they're
673  // in use in any released version of Debian, so we should consider
674  // removing them.
675  "/usr/include/x86_64-linux-gnu/32", "/usr/include/i686-linux-gnu",
676  "/usr/include/i486-linux-gnu"};
677  const StringRef AArch64MultiarchIncludeDirs[] = {
678  "/usr/include/aarch64-linux-gnu"};
679  const StringRef ARMMultiarchIncludeDirs[] = {
680  "/usr/include/arm-linux-gnueabi"};
681  const StringRef ARMHFMultiarchIncludeDirs[] = {
682  "/usr/include/arm-linux-gnueabihf"};
683  const StringRef ARMEBMultiarchIncludeDirs[] = {
684  "/usr/include/armeb-linux-gnueabi"};
685  const StringRef ARMEBHFMultiarchIncludeDirs[] = {
686  "/usr/include/armeb-linux-gnueabihf"};
687  const StringRef MIPSMultiarchIncludeDirs[] = {"/usr/include/mips-linux-gnu"};
688  const StringRef MIPSELMultiarchIncludeDirs[] = {
689  "/usr/include/mipsel-linux-gnu"};
690  const StringRef MIPS64MultiarchIncludeDirs[] = {
691  "/usr/include/mips64-linux-gnu", "/usr/include/mips64-linux-gnuabi64"};
692  const StringRef MIPS64ELMultiarchIncludeDirs[] = {
693  "/usr/include/mips64el-linux-gnu",
694  "/usr/include/mips64el-linux-gnuabi64"};
695  const StringRef PPCMultiarchIncludeDirs[] = {
696  "/usr/include/powerpc-linux-gnu"};
697  const StringRef PPC64MultiarchIncludeDirs[] = {
698  "/usr/include/powerpc64-linux-gnu"};
699  const StringRef PPC64LEMultiarchIncludeDirs[] = {
700  "/usr/include/powerpc64le-linux-gnu"};
701  const StringRef SparcMultiarchIncludeDirs[] = {
702  "/usr/include/sparc-linux-gnu"};
703  const StringRef Sparc64MultiarchIncludeDirs[] = {
704  "/usr/include/sparc64-linux-gnu"};
705  const StringRef SYSTEMZMultiarchIncludeDirs[] = {
706  "/usr/include/s390x-linux-gnu"};
707  ArrayRef<StringRef> MultiarchIncludeDirs;
708  switch (getTriple().getArch()) {
709  case llvm::Triple::x86_64:
710  MultiarchIncludeDirs = X86_64MultiarchIncludeDirs;
711  break;
712  case llvm::Triple::x86:
713  MultiarchIncludeDirs = X86MultiarchIncludeDirs;
714  break;
715  case llvm::Triple::aarch64:
716  case llvm::Triple::aarch64_be:
717  MultiarchIncludeDirs = AArch64MultiarchIncludeDirs;
718  break;
719  case llvm::Triple::arm:
720  case llvm::Triple::thumb:
721  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
722  MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs;
723  else
724  MultiarchIncludeDirs = ARMMultiarchIncludeDirs;
725  break;
726  case llvm::Triple::armeb:
727  case llvm::Triple::thumbeb:
728  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
729  MultiarchIncludeDirs = ARMEBHFMultiarchIncludeDirs;
730  else
731  MultiarchIncludeDirs = ARMEBMultiarchIncludeDirs;
732  break;
733  case llvm::Triple::mips:
734  MultiarchIncludeDirs = MIPSMultiarchIncludeDirs;
735  break;
736  case llvm::Triple::mipsel:
737  MultiarchIncludeDirs = MIPSELMultiarchIncludeDirs;
738  break;
739  case llvm::Triple::mips64:
740  MultiarchIncludeDirs = MIPS64MultiarchIncludeDirs;
741  break;
742  case llvm::Triple::mips64el:
743  MultiarchIncludeDirs = MIPS64ELMultiarchIncludeDirs;
744  break;
745  case llvm::Triple::ppc:
746  MultiarchIncludeDirs = PPCMultiarchIncludeDirs;
747  break;
748  case llvm::Triple::ppc64:
749  MultiarchIncludeDirs = PPC64MultiarchIncludeDirs;
750  break;
751  case llvm::Triple::ppc64le:
752  MultiarchIncludeDirs = PPC64LEMultiarchIncludeDirs;
753  break;
754  case llvm::Triple::sparc:
755  MultiarchIncludeDirs = SparcMultiarchIncludeDirs;
756  break;
757  case llvm::Triple::sparcv9:
758  MultiarchIncludeDirs = Sparc64MultiarchIncludeDirs;
759  break;
760  case llvm::Triple::systemz:
761  MultiarchIncludeDirs = SYSTEMZMultiarchIncludeDirs;
762  break;
763  default:
764  break;
765  }
766 
767  const std::string AndroidMultiarchIncludeDir =
768  std::string("/usr/include/") +
769  getMultiarchTriple(D, getTriple(), SysRoot);
770  const StringRef AndroidMultiarchIncludeDirs[] = {AndroidMultiarchIncludeDir};
771  if (getTriple().isAndroid())
772  MultiarchIncludeDirs = AndroidMultiarchIncludeDirs;
773 
774  for (StringRef Dir : MultiarchIncludeDirs) {
775  if (D.getVFS().exists(SysRoot + Dir)) {
776  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + Dir);
777  break;
778  }
779  }
780 
781  if (getTriple().getOS() == llvm::Triple::RTEMS)
782  return;
783 
784  // Add an include of '/include' directly. This isn't provided by default by
785  // system GCCs, but is often used with cross-compiling GCCs, and harmless to
786  // add even when Clang is acting as-if it were a system compiler.
787  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include");
788 
789  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include");
790 }
791 
792 static std::string DetectLibcxxIncludePath(StringRef base) {
793  std::error_code EC;
794  int MaxVersion = 0;
795  std::string MaxVersionString = "";
796  for (llvm::sys::fs::directory_iterator LI(base, EC), LE; !EC && LI != LE;
797  LI = LI.increment(EC)) {
798  StringRef VersionText = llvm::sys::path::filename(LI->path());
799  int Version;
800  if (VersionText[0] == 'v' &&
801  !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) {
802  if (Version > MaxVersion) {
803  MaxVersion = Version;
804  MaxVersionString = VersionText;
805  }
806  }
807  }
808  return MaxVersion ? (base + "/" + MaxVersionString).str() : "";
809 }
810 
811 void Linux::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
812  llvm::opt::ArgStringList &CC1Args) const {
813  const std::string& SysRoot = computeSysRoot();
814  const std::string LibCXXIncludePathCandidates[] = {
815  DetectLibcxxIncludePath(getDriver().ResourceDir + "/include/c++"),
816  DetectLibcxxIncludePath(getDriver().Dir + "/../include/c++"),
817  // If this is a development, non-installed, clang, libcxx will
818  // not be found at ../include/c++ but it likely to be found at
819  // one of the following two locations:
820  DetectLibcxxIncludePath(SysRoot + "/usr/local/include/c++"),
821  DetectLibcxxIncludePath(SysRoot + "/usr/include/c++") };
822  for (const auto &IncludePath : LibCXXIncludePathCandidates) {
823  if (IncludePath.empty() || !getVFS().exists(IncludePath))
824  continue;
825  // Use the first candidate that exists.
826  addSystemInclude(DriverArgs, CC1Args, IncludePath);
827  return;
828  }
829 }
830 
831 void Linux::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
832  llvm::opt::ArgStringList &CC1Args) const {
833  // We need a detected GCC installation on Linux to provide libstdc++'s
834  // headers.
835  if (!GCCInstallation.isValid())
836  return;
837 
838  // By default, look for the C++ headers in an include directory adjacent to
839  // the lib directory of the GCC installation. Note that this is expect to be
840  // equivalent to '/usr/include/c++/X.Y' in almost all cases.
841  StringRef LibDir = GCCInstallation.getParentLibPath();
842  StringRef InstallDir = GCCInstallation.getInstallPath();
843  StringRef TripleStr = GCCInstallation.getTriple().str();
845  const std::string GCCMultiarchTriple = getMultiarchTriple(
847  const std::string TargetMultiarchTriple =
849  const GCCVersion &Version = GCCInstallation.getVersion();
850 
851  // The primary search for libstdc++ supports multiarch variants.
852  if (addLibStdCXXIncludePaths(LibDir.str() + "/../include",
853  "/c++/" + Version.Text, TripleStr,
854  GCCMultiarchTriple, TargetMultiarchTriple,
855  Multilib.includeSuffix(), DriverArgs, CC1Args))
856  return;
857 
858  // Otherwise, fall back on a bunch of options which don't use multiarch
859  // layouts for simplicity.
860  const std::string LibStdCXXIncludePathCandidates[] = {
861  // Gentoo is weird and places its headers inside the GCC install,
862  // so if the first attempt to find the headers fails, try these patterns.
863  InstallDir.str() + "/include/g++-v" + Version.Text,
864  InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." +
865  Version.MinorStr,
866  InstallDir.str() + "/include/g++-v" + Version.MajorStr,
867  // Android standalone toolchain has C++ headers in yet another place.
868  LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
869  // Freescale SDK C++ headers are directly in <sysroot>/usr/include/c++,
870  // without a subdirectory corresponding to the gcc version.
871  LibDir.str() + "/../include/c++",
872  };
873 
874  for (const auto &IncludePath : LibStdCXXIncludePathCandidates) {
875  if (addLibStdCXXIncludePaths(IncludePath, /*Suffix*/ "", TripleStr,
876  /*GCCMultiarchTriple*/ "",
877  /*TargetMultiarchTriple*/ "",
878  Multilib.includeSuffix(), DriverArgs, CC1Args))
879  break;
880  }
881 }
882 
883 void Linux::AddCudaIncludeArgs(const ArgList &DriverArgs,
884  ArgStringList &CC1Args) const {
885  CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
886 }
887 
888 void Linux::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
889  ArgStringList &CC1Args) const {
890  if (GCCInstallation.isValid()) {
891  CC1Args.push_back("-isystem");
892  CC1Args.push_back(DriverArgs.MakeArgString(
893  GCCInstallation.getParentLibPath() + "/../" +
894  GCCInstallation.getTriple().str() + "/include"));
895  }
896 }
897 
898 bool Linux::isPIEDefault() const {
899  return (getTriple().isAndroid() && !getTriple().isAndroidVersionLT(16)) ||
900  getTriple().isMusl() || getSanitizerArgs().requiresPIE();
901 }
902 
904  const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
905  const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
906  const bool IsMIPS = getTriple().isMIPS32();
907  const bool IsMIPS64 = getTriple().isMIPS64();
908  const bool IsPowerPC64 = getTriple().getArch() == llvm::Triple::ppc64 ||
909  getTriple().getArch() == llvm::Triple::ppc64le;
910  const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64 ||
911  getTriple().getArch() == llvm::Triple::aarch64_be;
912  const bool IsArmArch = getTriple().getArch() == llvm::Triple::arm ||
913  getTriple().getArch() == llvm::Triple::thumb ||
914  getTriple().getArch() == llvm::Triple::armeb ||
915  getTriple().getArch() == llvm::Triple::thumbeb;
917  Res |= SanitizerKind::Address;
918  Res |= SanitizerKind::Fuzzer;
919  Res |= SanitizerKind::FuzzerNoLink;
920  Res |= SanitizerKind::KernelAddress;
921  Res |= SanitizerKind::Memory;
922  Res |= SanitizerKind::Vptr;
923  Res |= SanitizerKind::SafeStack;
924  if (IsX86_64 || IsMIPS64 || IsAArch64)
925  Res |= SanitizerKind::DataFlow;
926  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsArmArch || IsPowerPC64)
927  Res |= SanitizerKind::Leak;
928  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64)
929  Res |= SanitizerKind::Thread;
930  if (IsX86_64 || IsMIPS64)
931  Res |= SanitizerKind::Efficiency;
932  if (IsX86 || IsX86_64)
933  Res |= SanitizerKind::Function;
934  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch ||
935  IsPowerPC64)
936  Res |= SanitizerKind::Scudo;
937  if (IsX86_64 || IsAArch64) {
938  Res |= SanitizerKind::HWAddress;
939  Res |= SanitizerKind::KernelHWAddress;
940  }
941  return Res;
942 }
943 
944 void Linux::addProfileRTLibs(const llvm::opt::ArgList &Args,
945  llvm::opt::ArgStringList &CmdArgs) const {
946  if (!needsProfileRT(Args)) return;
947 
948  // Add linker option -u__llvm_runtime_variable to cause runtime
949  // initialization module to be linked in.
950  if (!Args.hasArg(options::OPT_coverage))
951  CmdArgs.push_back(Args.MakeArgString(
952  Twine("-u", llvm::getInstrProfRuntimeHookVarName())));
953  ToolChain::addProfileRTLibs(Args, CmdArgs);
954 }
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:702
bool isPIEDefault() const override
Test whether this toolchain defaults to PIE.
Definition: Linux.cpp:898
virtual std::string getDynamicLinker(const llvm::opt::ArgList &Args) const
Definition: Linux.cpp:476
static void addExternCSystemIncludeIfExists(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Definition: ToolChain.cpp:709
bool getBiarchSibling(Multilib &M) const
Get the biarch sibling multilib (if it exists).
Definition: Gnu.cpp:1756
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:903
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:831
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:642
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:883
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:429
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:394
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:792
vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:95
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:615
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:944
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:888
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 isUCLibc(const llvm::opt::ArgList &Args)
virtual std::string computeSysRoot() const
Definition: Linux.cpp:437
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:687
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:107
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:431
const llvm::Triple & getTriple() const
Definition: ToolChain.h:183
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:799
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:433
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:2466
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:1648
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:811
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