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"
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);
214  llvm::Triple::ArchType Arch = Triple.getArch();
215  std::string SysRoot = computeSysRoot();
216 
217  // Cross-compiling binutils and GCC installations (vanilla and openSUSE at
218  // least) put various tools in a triple-prefixed directory off of the parent
219  // of the GCC installation. We use the GCC triple here to ensure that we end
220  // up with tools that support the same amount of cross compiling as the
221  // detected GCC installation. For example, if we find a GCC installation
222  // targeting x86_64, but it is a bi-arch GCC installation, it can also be
223  // used to target i386.
224  // FIXME: This seems unlikely to be Linux-specific.
226  PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
227  GCCInstallation.getTriple().str() + "/bin")
228  .str());
229 
230  Distro Distro(D.getVFS());
231 
232  if (Distro.IsAlpineLinux()) {
233  ExtraOpts.push_back("-z");
234  ExtraOpts.push_back("now");
235  }
236 
238  ExtraOpts.push_back("-z");
239  ExtraOpts.push_back("relro");
240  }
241 
242  if (GCCInstallation.getParentLibPath().find("opt/rh/devtoolset") !=
243  StringRef::npos)
244  // With devtoolset on RHEL, we want to add a bin directory that is relative
245  // to the detected gcc install, because if we are using devtoolset gcc then
246  // we want to use other tools from devtoolset (e.g. ld) instead of the
247  // standard system tools.
248  PPaths.push_back(Twine(GCCInstallation.getParentLibPath() +
249  "/../bin").str());
250 
251  if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
252  ExtraOpts.push_back("-X");
253 
254  const bool IsAndroid = Triple.isAndroid();
255  const bool IsMips = Triple.isMIPS();
256  const bool IsHexagon = Arch == llvm::Triple::hexagon;
257  const bool IsRISCV =
258  Arch == llvm::Triple::riscv32 || Arch == llvm::Triple::riscv64;
259 
260  if (IsMips && !SysRoot.empty())
261  ExtraOpts.push_back("--sysroot=" + SysRoot);
262 
263  // Do not use 'gnu' hash style for Mips targets because .gnu.hash
264  // and the MIPS ABI require .dynsym to be sorted in different ways.
265  // .gnu.hash needs symbols to be grouped by hash code whereas the MIPS
266  // ABI requires a mapping between the GOT and the symbol table.
267  // Android loader does not support .gnu.hash.
268  // Hexagon linker/loader does not support .gnu.hash
269  if (!IsMips && !IsAndroid && !IsHexagon) {
272  ExtraOpts.push_back("--hash-style=gnu");
273 
276  ExtraOpts.push_back("--hash-style=both");
277  }
278 
280  ExtraOpts.push_back("--no-add-needed");
281 
282 #ifdef ENABLE_LINKER_BUILD_ID
283  ExtraOpts.push_back("--build-id");
284 #endif
285 
286  if (IsAndroid || Distro.IsOpenSUSE())
287  ExtraOpts.push_back("--enable-new-dtags");
288 
289  // The selection of paths to try here is designed to match the patterns which
290  // the GCC driver itself uses, as this is part of the GCC-compatible driver.
291  // This was determined by running GCC in a fake filesystem, creating all
292  // possible permutations of these directories, and seeing which ones it added
293  // to the link paths.
294  path_list &Paths = getFilePaths();
295 
296  const std::string OSLibDir = getOSLibDir(Triple, Args);
297  const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
298 
299  // Add the multilib suffixed paths where they are available.
300  if (GCCInstallation.isValid()) {
301  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
302  const std::string &LibPath = GCCInstallation.getParentLibPath();
303 
304  // Add toolchain / multilib specific file paths.
307 
308  // Sourcery CodeBench MIPS toolchain holds some libraries under
309  // a biarch-like suffix of the GCC installation.
311  Paths);
312 
313  // GCC cross compiling toolchains will install target libraries which ship
314  // as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
315  // any part of the GCC installation in
316  // <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
317  // debatable, but is the reality today. We need to search this tree even
318  // when we have a sysroot somewhere else. It is the responsibility of
319  // whomever is doing the cross build targeting a sysroot using a GCC
320  // installation that is *not* within the system root to ensure two things:
321  //
322  // 1) Any DSOs that are linked in from this tree or from the install path
323  // above must be present on the system root and found via an
324  // appropriate rpath.
325  // 2) There must not be libraries installed into
326  // <prefix>/<triple>/<libdir> unless they should be preferred over
327  // those within the system root.
328  //
329  // Note that this matches the GCC behavior. See the below comment for where
330  // Clang diverges from GCC's behavior.
331  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" +
332  OSLibDir + SelectedMultilib.osSuffix(),
333  Paths);
334 
335  // If the GCC installation we found is inside of the sysroot, we want to
336  // prefer libraries installed in the parent prefix of the GCC installation.
337  // It is important to *not* use these paths when the GCC installation is
338  // outside of the system root as that can pick up unintended libraries.
339  // This usually happens when there is an external cross compiler on the
340  // host system, and a more minimal sysroot available that is the target of
341  // the cross. Note that GCC does include some of these directories in some
342  // configurations but this seems somewhere between questionable and simply
343  // a bug.
344  if (StringRef(LibPath).startswith(SysRoot)) {
345  addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths);
346  addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
347  }
348  }
349 
350  // Similar to the logic for GCC above, if we currently running Clang inside
351  // of the requested system root, add its parent library paths to
352  // those searched.
353  // FIXME: It's not clear whether we should use the driver's installed
354  // directory ('Dir' below) or the ResourceDir.
355  if (StringRef(D.Dir).startswith(SysRoot)) {
356  addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths);
357  addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths);
358  }
359 
360  addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
361  addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
362 
363  if (IsAndroid) {
364  // Android sysroots contain a library directory for each supported OS
365  // version as well as some unversioned libraries in the usual multiarch
366  // directory.
367  unsigned Major;
368  unsigned Minor;
369  unsigned Micro;
370  Triple.getEnvironmentVersion(Major, Minor, Micro);
371  addPathIfExists(D,
372  SysRoot + "/usr/lib/" + MultiarchTriple + "/" +
373  llvm::to_string(Major),
374  Paths);
375  }
376 
377  addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths);
378  // 64-bit OpenEmbedded sysroots may not have a /usr/lib dir. So they cannot
379  // find /usr/lib64 as it is referenced as /usr/lib/../lib64. So we handle
380  // this here.
381  if (Triple.getVendor() == llvm::Triple::OpenEmbedded &&
382  Triple.isArch64Bit())
383  addPathIfExists(D, SysRoot + "/usr/" + OSLibDir, Paths);
384  else
385  addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths);
386  if (IsRISCV) {
387  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
388  addPathIfExists(D, SysRoot + "/" + OSLibDir + "/" + ABIName, Paths);
389  addPathIfExists(D, SysRoot + "/usr/" + OSLibDir + "/" + ABIName, Paths);
390  }
391 
392  // Try walking via the GCC triple path in case of biarch or multiarch GCC
393  // installations with strange symlinks.
394  if (GCCInstallation.isValid()) {
395  addPathIfExists(D,
396  SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() +
397  "/../../" + OSLibDir,
398  Paths);
399 
400  // Add the 'other' biarch variant path
401  Multilib BiarchSibling;
402  if (GCCInstallation.getBiarchSibling(BiarchSibling)) {
404  BiarchSibling.gccSuffix(),
405  Paths);
406  }
407 
408  // See comments above on the multilib variant for details of why this is
409  // included even from outside the sysroot.
410  const std::string &LibPath = GCCInstallation.getParentLibPath();
411  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
413  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" +
414  Multilib.osSuffix(),
415  Paths);
416 
417  // See comments above on the multilib variant for details of why this is
418  // only included from within the sysroot.
419  if (StringRef(LibPath).startswith(SysRoot))
420  addPathIfExists(D, LibPath, Paths);
421  }
422 
423  // Similar to the logic for GCC above, if we are currently running Clang
424  // inside of the requested system root, add its parent library path to those
425  // searched.
426  // FIXME: It's not clear whether we should use the driver's installed
427  // directory ('Dir' below) or the ResourceDir.
428  if (StringRef(D.Dir).startswith(SysRoot))
429  addPathIfExists(D, D.Dir + "/../lib", Paths);
430 
431  addPathIfExists(D, SysRoot + "/lib", Paths);
432  addPathIfExists(D, SysRoot + "/usr/lib", Paths);
433 }
434 
435 bool Linux::HasNativeLLVMSupport() const { return true; }
436 
437 Tool *Linux::buildLinker() const { return new tools::gnutools::Linker(*this); }
438 
440  return new tools::gnutools::Assembler(*this);
441 }
442 
443 std::string Linux::computeSysRoot() const {
444  if (!getDriver().SysRoot.empty())
445  return getDriver().SysRoot;
446 
447  if (getTriple().isAndroid()) {
448  // Android toolchains typically include a sysroot at ../sysroot relative to
449  // the clang binary.
450  const StringRef ClangDir = getDriver().getInstalledDir();
451  std::string AndroidSysRootPath = (ClangDir + "/../sysroot").str();
452  if (getVFS().exists(AndroidSysRootPath))
453  return AndroidSysRootPath;
454  }
455 
456  if (!GCCInstallation.isValid() || !getTriple().isMIPS())
457  return std::string();
458 
459  // Standalone MIPS toolchains use different names for sysroot folder
460  // and put it into different places. Here we try to check some known
461  // variants.
462 
463  const StringRef InstallDir = GCCInstallation.getInstallPath();
464  const StringRef TripleStr = GCCInstallation.getTriple().str();
466 
467  std::string Path =
468  (InstallDir + "/../../../../" + TripleStr + "/libc" + Multilib.osSuffix())
469  .str();
470 
471  if (getVFS().exists(Path))
472  return Path;
473 
474  Path = (InstallDir + "/../../../../sysroot" + Multilib.osSuffix()).str();
475 
476  if (getVFS().exists(Path))
477  return Path;
478 
479  return std::string();
480 }
481 
482 std::string Linux::getDynamicLinker(const ArgList &Args) const {
483  const llvm::Triple::ArchType Arch = getArch();
484  const llvm::Triple &Triple = getTriple();
485 
486  const Distro Distro(getDriver().getVFS());
487 
488  if (Triple.isAndroid())
489  return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker";
490 
491  if (Triple.isMusl()) {
492  std::string ArchName;
493  bool IsArm = false;
494 
495  switch (Arch) {
496  case llvm::Triple::arm:
497  case llvm::Triple::thumb:
498  ArchName = "arm";
499  IsArm = true;
500  break;
501  case llvm::Triple::armeb:
502  case llvm::Triple::thumbeb:
503  ArchName = "armeb";
504  IsArm = true;
505  break;
506  default:
507  ArchName = Triple.getArchName().str();
508  }
509  if (IsArm &&
510  (Triple.getEnvironment() == llvm::Triple::MuslEABIHF ||
512  ArchName += "hf";
513 
514  return "/lib/ld-musl-" + ArchName + ".so.1";
515  }
516 
517  std::string LibDir;
518  std::string Loader;
519 
520  switch (Arch) {
521  default:
522  llvm_unreachable("unsupported architecture");
523 
524  case llvm::Triple::aarch64:
525  LibDir = "lib";
526  Loader = "ld-linux-aarch64.so.1";
527  break;
528  case llvm::Triple::aarch64_be:
529  LibDir = "lib";
530  Loader = "ld-linux-aarch64_be.so.1";
531  break;
532  case llvm::Triple::arm:
533  case llvm::Triple::thumb:
534  case llvm::Triple::armeb:
535  case llvm::Triple::thumbeb: {
536  const bool HF =
537  Triple.getEnvironment() == llvm::Triple::GNUEABIHF ||
539 
540  LibDir = "lib";
541  Loader = HF ? "ld-linux-armhf.so.3" : "ld-linux.so.3";
542  break;
543  }
544  case llvm::Triple::mips:
545  case llvm::Triple::mipsel:
546  case llvm::Triple::mips64:
547  case llvm::Triple::mips64el: {
548  bool IsNaN2008 = tools::mips::isNaN2008(Args, Triple);
549 
550  LibDir = "lib" + tools::mips::getMipsABILibSuffix(Args, Triple);
551 
552  if (tools::mips::isUCLibc(Args))
553  Loader = IsNaN2008 ? "ld-uClibc-mipsn8.so.0" : "ld-uClibc.so.0";
554  else if (!Triple.hasEnvironment() &&
555  Triple.getVendor() == llvm::Triple::VendorType::MipsTechnologies)
556  Loader =
557  Triple.isLittleEndian() ? "ld-musl-mipsel.so.1" : "ld-musl-mips.so.1";
558  else
559  Loader = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1";
560 
561  break;
562  }
563  case llvm::Triple::ppc:
564  LibDir = "lib";
565  Loader = "ld.so.1";
566  break;
567  case llvm::Triple::ppc64:
568  LibDir = "lib64";
569  Loader =
570  (tools::ppc::hasPPCAbiArg(Args, "elfv2")) ? "ld64.so.2" : "ld64.so.1";
571  break;
572  case llvm::Triple::ppc64le:
573  LibDir = "lib64";
574  Loader =
575  (tools::ppc::hasPPCAbiArg(Args, "elfv1")) ? "ld64.so.1" : "ld64.so.2";
576  break;
577  case llvm::Triple::riscv32: {
578  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
579  LibDir = "lib";
580  Loader = ("ld-linux-riscv32-" + ABIName + ".so.1").str();
581  break;
582  }
583  case llvm::Triple::riscv64: {
584  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
585  LibDir = "lib";
586  Loader = ("ld-linux-riscv64-" + ABIName + ".so.1").str();
587  break;
588  }
589  case llvm::Triple::sparc:
590  case llvm::Triple::sparcel:
591  LibDir = "lib";
592  Loader = "ld-linux.so.2";
593  break;
594  case llvm::Triple::sparcv9:
595  LibDir = "lib64";
596  Loader = "ld-linux.so.2";
597  break;
598  case llvm::Triple::systemz:
599  LibDir = "lib";
600  Loader = "ld64.so.1";
601  break;
602  case llvm::Triple::x86:
603  LibDir = "lib";
604  Loader = "ld-linux.so.2";
605  break;
606  case llvm::Triple::x86_64: {
607  bool X32 = Triple.getEnvironment() == llvm::Triple::GNUX32;
608 
609  LibDir = X32 ? "libx32" : "lib64";
610  Loader = X32 ? "ld-linux-x32.so.2" : "ld-linux-x86-64.so.2";
611  break;
612  }
613  }
614 
615  if (Distro == Distro::Exherbo && (Triple.getVendor() == llvm::Triple::UnknownVendor ||
616  Triple.getVendor() == llvm::Triple::PC))
617  return "/usr/" + Triple.str() + "/lib/" + Loader;
618  return "/" + LibDir + "/" + Loader;
619 }
620 
621 void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
622  ArgStringList &CC1Args) const {
623  const Driver &D = getDriver();
624  std::string SysRoot = computeSysRoot();
625 
626  if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
627  return;
628 
629  if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
630  addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include");
631 
632  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
634  llvm::sys::path::append(P, "include");
635  addSystemInclude(DriverArgs, CC1Args, P);
636  }
637 
638  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
639  return;
640 
641  // Check for configure-time C include directories.
642  StringRef CIncludeDirs(C_INCLUDE_DIRS);
643  if (CIncludeDirs != "") {
645  CIncludeDirs.split(dirs, ":");
646  for (StringRef dir : dirs) {
647  StringRef Prefix =
648  llvm::sys::path::is_absolute(dir) ? StringRef(SysRoot) : "";
649  addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
650  }
651  return;
652  }
653 
654  // Lacking those, try to detect the correct set of system includes for the
655  // target triple.
656 
657  // Add include directories specific to the selected multilib set and multilib.
658  if (GCCInstallation.isValid()) {
659  const auto &Callback = Multilibs.includeDirsCallback();
660  if (Callback) {
661  for (const auto &Path : Callback(GCCInstallation.getMultilib()))
663  DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path);
664  }
665  }
666 
667  // Implement generic Debian multiarch support.
668  const StringRef X86_64MultiarchIncludeDirs[] = {
669  "/usr/include/x86_64-linux-gnu",
670 
671  // FIXME: These are older forms of multiarch. It's not clear that they're
672  // in use in any released version of Debian, so we should consider
673  // removing them.
674  "/usr/include/i686-linux-gnu/64", "/usr/include/i486-linux-gnu/64"};
675  const StringRef X86MultiarchIncludeDirs[] = {
676  "/usr/include/i386-linux-gnu",
677 
678  // FIXME: These are older forms of multiarch. It's not clear that they're
679  // in use in any released version of Debian, so we should consider
680  // removing them.
681  "/usr/include/x86_64-linux-gnu/32", "/usr/include/i686-linux-gnu",
682  "/usr/include/i486-linux-gnu"};
683  const StringRef AArch64MultiarchIncludeDirs[] = {
684  "/usr/include/aarch64-linux-gnu"};
685  const StringRef ARMMultiarchIncludeDirs[] = {
686  "/usr/include/arm-linux-gnueabi"};
687  const StringRef ARMHFMultiarchIncludeDirs[] = {
688  "/usr/include/arm-linux-gnueabihf"};
689  const StringRef ARMEBMultiarchIncludeDirs[] = {
690  "/usr/include/armeb-linux-gnueabi"};
691  const StringRef ARMEBHFMultiarchIncludeDirs[] = {
692  "/usr/include/armeb-linux-gnueabihf"};
693  const StringRef MIPSMultiarchIncludeDirs[] = {"/usr/include/mips-linux-gnu"};
694  const StringRef MIPSELMultiarchIncludeDirs[] = {
695  "/usr/include/mipsel-linux-gnu"};
696  const StringRef MIPS64MultiarchIncludeDirs[] = {
697  "/usr/include/mips64-linux-gnu", "/usr/include/mips64-linux-gnuabi64"};
698  const StringRef MIPS64ELMultiarchIncludeDirs[] = {
699  "/usr/include/mips64el-linux-gnu",
700  "/usr/include/mips64el-linux-gnuabi64"};
701  const StringRef PPCMultiarchIncludeDirs[] = {
702  "/usr/include/powerpc-linux-gnu",
703  "/usr/include/powerpc-linux-gnuspe"};
704  const StringRef PPC64MultiarchIncludeDirs[] = {
705  "/usr/include/powerpc64-linux-gnu"};
706  const StringRef PPC64LEMultiarchIncludeDirs[] = {
707  "/usr/include/powerpc64le-linux-gnu"};
708  const StringRef SparcMultiarchIncludeDirs[] = {
709  "/usr/include/sparc-linux-gnu"};
710  const StringRef Sparc64MultiarchIncludeDirs[] = {
711  "/usr/include/sparc64-linux-gnu"};
712  const StringRef SYSTEMZMultiarchIncludeDirs[] = {
713  "/usr/include/s390x-linux-gnu"};
714  ArrayRef<StringRef> MultiarchIncludeDirs;
715  switch (getTriple().getArch()) {
716  case llvm::Triple::x86_64:
717  MultiarchIncludeDirs = X86_64MultiarchIncludeDirs;
718  break;
719  case llvm::Triple::x86:
720  MultiarchIncludeDirs = X86MultiarchIncludeDirs;
721  break;
722  case llvm::Triple::aarch64:
723  case llvm::Triple::aarch64_be:
724  MultiarchIncludeDirs = AArch64MultiarchIncludeDirs;
725  break;
726  case llvm::Triple::arm:
727  case llvm::Triple::thumb:
728  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
729  MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs;
730  else
731  MultiarchIncludeDirs = ARMMultiarchIncludeDirs;
732  break;
733  case llvm::Triple::armeb:
734  case llvm::Triple::thumbeb:
735  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
736  MultiarchIncludeDirs = ARMEBHFMultiarchIncludeDirs;
737  else
738  MultiarchIncludeDirs = ARMEBMultiarchIncludeDirs;
739  break;
740  case llvm::Triple::mips:
741  MultiarchIncludeDirs = MIPSMultiarchIncludeDirs;
742  break;
743  case llvm::Triple::mipsel:
744  MultiarchIncludeDirs = MIPSELMultiarchIncludeDirs;
745  break;
746  case llvm::Triple::mips64:
747  MultiarchIncludeDirs = MIPS64MultiarchIncludeDirs;
748  break;
749  case llvm::Triple::mips64el:
750  MultiarchIncludeDirs = MIPS64ELMultiarchIncludeDirs;
751  break;
752  case llvm::Triple::ppc:
753  MultiarchIncludeDirs = PPCMultiarchIncludeDirs;
754  break;
755  case llvm::Triple::ppc64:
756  MultiarchIncludeDirs = PPC64MultiarchIncludeDirs;
757  break;
758  case llvm::Triple::ppc64le:
759  MultiarchIncludeDirs = PPC64LEMultiarchIncludeDirs;
760  break;
761  case llvm::Triple::sparc:
762  MultiarchIncludeDirs = SparcMultiarchIncludeDirs;
763  break;
764  case llvm::Triple::sparcv9:
765  MultiarchIncludeDirs = Sparc64MultiarchIncludeDirs;
766  break;
767  case llvm::Triple::systemz:
768  MultiarchIncludeDirs = SYSTEMZMultiarchIncludeDirs;
769  break;
770  default:
771  break;
772  }
773 
774  const std::string AndroidMultiarchIncludeDir =
775  std::string("/usr/include/") +
776  getMultiarchTriple(D, getTriple(), SysRoot);
777  const StringRef AndroidMultiarchIncludeDirs[] = {AndroidMultiarchIncludeDir};
778  if (getTriple().isAndroid())
779  MultiarchIncludeDirs = AndroidMultiarchIncludeDirs;
780 
781  for (StringRef Dir : MultiarchIncludeDirs) {
782  if (D.getVFS().exists(SysRoot + Dir)) {
783  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + Dir);
784  break;
785  }
786  }
787 
788  if (getTriple().getOS() == llvm::Triple::RTEMS)
789  return;
790 
791  // Add an include of '/include' directly. This isn't provided by default by
792  // system GCCs, but is often used with cross-compiling GCCs, and harmless to
793  // add even when Clang is acting as-if it were a system compiler.
794  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include");
795 
796  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include");
797 }
798 
799 static std::string DetectLibcxxIncludePath(StringRef base) {
800  std::error_code EC;
801  int MaxVersion = 0;
802  std::string MaxVersionString = "";
803  for (llvm::sys::fs::directory_iterator LI(base, EC), LE; !EC && LI != LE;
804  LI = LI.increment(EC)) {
805  StringRef VersionText = llvm::sys::path::filename(LI->path());
806  int Version;
807  if (VersionText[0] == 'v' &&
808  !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) {
809  if (Version > MaxVersion) {
810  MaxVersion = Version;
811  MaxVersionString = VersionText;
812  }
813  }
814  }
815  return MaxVersion ? (base + "/" + MaxVersionString).str() : "";
816 }
817 
818 void Linux::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
819  llvm::opt::ArgStringList &CC1Args) const {
820  const std::string& SysRoot = computeSysRoot();
821  const std::string LibCXXIncludePathCandidates[] = {
822  DetectLibcxxIncludePath(getDriver().ResourceDir + "/include/c++"),
823  DetectLibcxxIncludePath(getDriver().Dir + "/../include/c++"),
824  // If this is a development, non-installed, clang, libcxx will
825  // not be found at ../include/c++ but it likely to be found at
826  // one of the following two locations:
827  DetectLibcxxIncludePath(SysRoot + "/usr/local/include/c++"),
828  DetectLibcxxIncludePath(SysRoot + "/usr/include/c++") };
829  for (const auto &IncludePath : LibCXXIncludePathCandidates) {
830  if (IncludePath.empty() || !getVFS().exists(IncludePath))
831  continue;
832  // Use the first candidate that exists.
833  addSystemInclude(DriverArgs, CC1Args, IncludePath);
834  return;
835  }
836 }
837 
838 void Linux::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
839  llvm::opt::ArgStringList &CC1Args) const {
840  // We need a detected GCC installation on Linux to provide libstdc++'s
841  // headers.
842  if (!GCCInstallation.isValid())
843  return;
844 
845  // By default, look for the C++ headers in an include directory adjacent to
846  // the lib directory of the GCC installation. Note that this is expect to be
847  // equivalent to '/usr/include/c++/X.Y' in almost all cases.
848  StringRef LibDir = GCCInstallation.getParentLibPath();
849  StringRef InstallDir = GCCInstallation.getInstallPath();
850  StringRef TripleStr = GCCInstallation.getTriple().str();
852  const std::string GCCMultiarchTriple = getMultiarchTriple(
854  const std::string TargetMultiarchTriple =
856  const GCCVersion &Version = GCCInstallation.getVersion();
857 
858  // The primary search for libstdc++ supports multiarch variants.
859  if (addLibStdCXXIncludePaths(LibDir.str() + "/../include",
860  "/c++/" + Version.Text, TripleStr,
861  GCCMultiarchTriple, TargetMultiarchTriple,
862  Multilib.includeSuffix(), DriverArgs, CC1Args))
863  return;
864 
865  // Otherwise, fall back on a bunch of options which don't use multiarch
866  // layouts for simplicity.
867  const std::string LibStdCXXIncludePathCandidates[] = {
868  // Gentoo is weird and places its headers inside the GCC install,
869  // so if the first attempt to find the headers fails, try these patterns.
870  InstallDir.str() + "/include/g++-v" + Version.Text,
871  InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." +
872  Version.MinorStr,
873  InstallDir.str() + "/include/g++-v" + Version.MajorStr,
874  // Android standalone toolchain has C++ headers in yet another place.
875  LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
876  // Freescale SDK C++ headers are directly in <sysroot>/usr/include/c++,
877  // without a subdirectory corresponding to the gcc version.
878  LibDir.str() + "/../include/c++",
879  };
880 
881  for (const auto &IncludePath : LibStdCXXIncludePathCandidates) {
882  if (addLibStdCXXIncludePaths(IncludePath, /*Suffix*/ "", TripleStr,
883  /*GCCMultiarchTriple*/ "",
884  /*TargetMultiarchTriple*/ "",
885  Multilib.includeSuffix(), DriverArgs, CC1Args))
886  break;
887  }
888 }
889 
890 void Linux::AddCudaIncludeArgs(const ArgList &DriverArgs,
891  ArgStringList &CC1Args) const {
892  CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
893 }
894 
895 void Linux::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
896  ArgStringList &CC1Args) const {
897  if (GCCInstallation.isValid()) {
898  CC1Args.push_back("-isystem");
899  CC1Args.push_back(DriverArgs.MakeArgString(
900  GCCInstallation.getParentLibPath() + "/../" +
901  GCCInstallation.getTriple().str() + "/include"));
902  }
903 }
904 
905 bool Linux::isPIEDefault() const {
906  return (getTriple().isAndroid() && !getTriple().isAndroidVersionLT(16)) ||
907  getTriple().isMusl() || getSanitizerArgs().requiresPIE();
908 }
909 
911  if (getTriple().isAndroid())
912  return false;
914 }
915 
917  const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
918  const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
919  const bool IsMIPS = getTriple().isMIPS32();
920  const bool IsMIPS64 = getTriple().isMIPS64();
921  const bool IsPowerPC64 = getTriple().getArch() == llvm::Triple::ppc64 ||
922  getTriple().getArch() == llvm::Triple::ppc64le;
923  const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64 ||
924  getTriple().getArch() == llvm::Triple::aarch64_be;
925  const bool IsArmArch = getTriple().getArch() == llvm::Triple::arm ||
926  getTriple().getArch() == llvm::Triple::thumb ||
927  getTriple().getArch() == llvm::Triple::armeb ||
928  getTriple().getArch() == llvm::Triple::thumbeb;
930  Res |= SanitizerKind::Address;
931  Res |= SanitizerKind::Fuzzer;
932  Res |= SanitizerKind::FuzzerNoLink;
933  Res |= SanitizerKind::KernelAddress;
934  Res |= SanitizerKind::Memory;
935  Res |= SanitizerKind::Vptr;
936  Res |= SanitizerKind::SafeStack;
937  if (IsX86_64 || IsMIPS64 || IsAArch64)
938  Res |= SanitizerKind::DataFlow;
939  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsArmArch || IsPowerPC64)
940  Res |= SanitizerKind::Leak;
941  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64)
942  Res |= SanitizerKind::Thread;
943  if (IsX86_64)
944  Res |= SanitizerKind::KernelMemory;
945  if (IsX86_64 || IsMIPS64)
946  Res |= SanitizerKind::Efficiency;
947  if (IsX86 || IsX86_64)
948  Res |= SanitizerKind::Function;
949  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch ||
950  IsPowerPC64)
951  Res |= SanitizerKind::Scudo;
952  if (IsX86_64 || IsAArch64) {
953  Res |= SanitizerKind::HWAddress;
954  Res |= SanitizerKind::KernelHWAddress;
955  }
956  return Res;
957 }
958 
959 void Linux::addProfileRTLibs(const llvm::opt::ArgList &Args,
960  llvm::opt::ArgStringList &CmdArgs) const {
961  if (!needsProfileRT(Args)) return;
962 
963  // Add linker option -u__llvm_runtime_variable to cause runtime
964  // initialization module to be linked in.
965  if (!Args.hasArg(options::OPT_coverage))
966  CmdArgs.push_back(Args.MakeArgString(
967  Twine("-u", llvm::getInstrProfRuntimeHookVarName())));
968  ToolChain::addProfileRTLibs(Args, CmdArgs);
969 }
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:709
bool isPIEDefault() const override
Test whether this toolchain defaults to PIE.
Definition: Linux.cpp:905
virtual std::string getDynamicLinker(const llvm::opt::ArgList &Args) const
Definition: Linux.cpp:482
static void addExternCSystemIncludeIfExists(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Definition: ToolChain.cpp:716
bool getBiarchSibling(Multilib &M) const
Get the biarch sibling multilib (if it exists).
Definition: Gnu.cpp:1745
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:916
StringRef getOS() const
Definition: ToolChain.h:204
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:838
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:649
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:890
GCCInstallationDetector GCCInstallation
Definition: Gnu.h:280
path_list & getProgramPaths()
Definition: ToolChain.h:226
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:435
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:401
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:799
vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:102
path_list & getFilePaths()
Definition: ToolChain.h:223
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:621
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:959
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:329
bool IsDebian() const
Definition: Distro.h:113
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:201
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:895
vfs::FileSystem & getVFS() const
Definition: Driver.h:301
const Driver & getDriver() const
Definition: ToolChain.h:185
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:443
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:694
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:910
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:114
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:437
const llvm::Triple & getTriple() const
Definition: ToolChain.h:187
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:810
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:439
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:2458
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:1637
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:818
std::vector< std::string > ExtraOpts
Definition: Linux.h:49
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