clang  10.0.0svn
Linux.cpp
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1 //===--- Linux.h - Linux ToolChain Implementations --------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "Linux.h"
10 #include "Arch/ARM.h"
11 #include "Arch/Mips.h"
12 #include "Arch/PPC.h"
13 #include "Arch/RISCV.h"
14 #include "CommonArgs.h"
15 #include "clang/Config/config.h"
16 #include "clang/Driver/Distro.h"
17 #include "clang/Driver/Driver.h"
18 #include "clang/Driver/Options.h"
20 #include "llvm/Option/ArgList.h"
21 #include "llvm/ProfileData/InstrProf.h"
22 #include "llvm/Support/Path.h"
23 #include "llvm/Support/ScopedPrinter.h"
24 #include "llvm/Support/VirtualFileSystem.h"
25 #include <system_error>
26 
27 using namespace clang::driver;
28 using namespace clang::driver::toolchains;
29 using namespace clang;
30 using namespace llvm::opt;
31 
33 
34 /// Get our best guess at the multiarch triple for a target.
35 ///
36 /// Debian-based systems are starting to use a multiarch setup where they use
37 /// a target-triple directory in the library and header search paths.
38 /// Unfortunately, this triple does not align with the vanilla target triple,
39 /// so we provide a rough mapping here.
40 static std::string getMultiarchTriple(const Driver &D,
41  const llvm::Triple &TargetTriple,
42  StringRef SysRoot) {
43  llvm::Triple::EnvironmentType TargetEnvironment =
44  TargetTriple.getEnvironment();
45  bool IsAndroid = TargetTriple.isAndroid();
46  bool IsMipsR6 = TargetTriple.getSubArch() == llvm::Triple::MipsSubArch_r6;
47  bool IsMipsN32Abi = TargetTriple.getEnvironment() == llvm::Triple::GNUABIN32;
48 
49  // For most architectures, just use whatever we have rather than trying to be
50  // clever.
51  switch (TargetTriple.getArch()) {
52  default:
53  break;
54 
55  // We use the existence of '/lib/<triple>' as a directory to detect some
56  // common linux triples that don't quite match the Clang triple for both
57  // 32-bit and 64-bit targets. Multiarch fixes its install triples to these
58  // regardless of what the actual target triple is.
59  case llvm::Triple::arm:
60  case llvm::Triple::thumb:
61  if (IsAndroid) {
62  return "arm-linux-androideabi";
63  } else if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
64  if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabihf"))
65  return "arm-linux-gnueabihf";
66  } else {
67  if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabi"))
68  return "arm-linux-gnueabi";
69  }
70  break;
71  case llvm::Triple::armeb:
72  case llvm::Triple::thumbeb:
73  if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
74  if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabihf"))
75  return "armeb-linux-gnueabihf";
76  } else {
77  if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabi"))
78  return "armeb-linux-gnueabi";
79  }
80  break;
81  case llvm::Triple::x86:
82  if (IsAndroid)
83  return "i686-linux-android";
84  if (D.getVFS().exists(SysRoot + "/lib/i386-linux-gnu"))
85  return "i386-linux-gnu";
86  break;
87  case llvm::Triple::x86_64:
88  if (IsAndroid)
89  return "x86_64-linux-android";
90  // We don't want this for x32, otherwise it will match x86_64 libs
91  if (TargetEnvironment != llvm::Triple::GNUX32 &&
92  D.getVFS().exists(SysRoot + "/lib/x86_64-linux-gnu"))
93  return "x86_64-linux-gnu";
94  break;
95  case llvm::Triple::aarch64:
96  if (IsAndroid)
97  return "aarch64-linux-android";
98  if (D.getVFS().exists(SysRoot + "/lib/aarch64-linux-gnu"))
99  return "aarch64-linux-gnu";
100  break;
101  case llvm::Triple::aarch64_be:
102  if (D.getVFS().exists(SysRoot + "/lib/aarch64_be-linux-gnu"))
103  return "aarch64_be-linux-gnu";
104  break;
105  case llvm::Triple::mips: {
106  std::string MT = IsMipsR6 ? "mipsisa32r6-linux-gnu" : "mips-linux-gnu";
107  if (D.getVFS().exists(SysRoot + "/lib/" + MT))
108  return MT;
109  break;
110  }
111  case llvm::Triple::mipsel: {
112  if (IsAndroid)
113  return "mipsel-linux-android";
114  std::string MT = IsMipsR6 ? "mipsisa32r6el-linux-gnu" : "mipsel-linux-gnu";
115  if (D.getVFS().exists(SysRoot + "/lib/" + MT))
116  return MT;
117  break;
118  }
119  case llvm::Triple::mips64: {
120  std::string MT = std::string(IsMipsR6 ? "mipsisa64r6" : "mips64") +
121  "-linux-" + (IsMipsN32Abi ? "gnuabin32" : "gnuabi64");
122  if (D.getVFS().exists(SysRoot + "/lib/" + MT))
123  return MT;
124  if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnu"))
125  return "mips64-linux-gnu";
126  break;
127  }
128  case llvm::Triple::mips64el: {
129  if (IsAndroid)
130  return "mips64el-linux-android";
131  std::string MT = std::string(IsMipsR6 ? "mipsisa64r6el" : "mips64el") +
132  "-linux-" + (IsMipsN32Abi ? "gnuabin32" : "gnuabi64");
133  if (D.getVFS().exists(SysRoot + "/lib/" + MT))
134  return MT;
135  if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnu"))
136  return "mips64el-linux-gnu";
137  break;
138  }
139  case llvm::Triple::ppc:
140  if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnuspe"))
141  return "powerpc-linux-gnuspe";
142  if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnu"))
143  return "powerpc-linux-gnu";
144  break;
145  case llvm::Triple::ppc64:
146  if (D.getVFS().exists(SysRoot + "/lib/powerpc64-linux-gnu"))
147  return "powerpc64-linux-gnu";
148  break;
149  case llvm::Triple::ppc64le:
150  if (D.getVFS().exists(SysRoot + "/lib/powerpc64le-linux-gnu"))
151  return "powerpc64le-linux-gnu";
152  break;
153  case llvm::Triple::sparc:
154  if (D.getVFS().exists(SysRoot + "/lib/sparc-linux-gnu"))
155  return "sparc-linux-gnu";
156  break;
157  case llvm::Triple::sparcv9:
158  if (D.getVFS().exists(SysRoot + "/lib/sparc64-linux-gnu"))
159  return "sparc64-linux-gnu";
160  break;
161  case llvm::Triple::systemz:
162  if (D.getVFS().exists(SysRoot + "/lib/s390x-linux-gnu"))
163  return "s390x-linux-gnu";
164  break;
165  }
166  return TargetTriple.str();
167 }
168 
169 static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args) {
170  if (Triple.isMIPS()) {
171  if (Triple.isAndroid()) {
172  StringRef CPUName;
173  StringRef ABIName;
174  tools::mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
175  if (CPUName == "mips32r6")
176  return "libr6";
177  if (CPUName == "mips32r2")
178  return "libr2";
179  }
180  // lib32 directory has a special meaning on MIPS targets.
181  // It contains N32 ABI binaries. Use this folder if produce
182  // code for N32 ABI only.
183  if (tools::mips::hasMipsAbiArg(Args, "n32"))
184  return "lib32";
185  return Triple.isArch32Bit() ? "lib" : "lib64";
186  }
187 
188  // It happens that only x86 and PPC use the 'lib32' variant of oslibdir, and
189  // using that variant while targeting other architectures causes problems
190  // because the libraries are laid out in shared system roots that can't cope
191  // with a 'lib32' library search path being considered. So we only enable
192  // them when we know we may need it.
193  //
194  // FIXME: This is a bit of a hack. We should really unify this code for
195  // reasoning about oslibdir spellings with the lib dir spellings in the
196  // GCCInstallationDetector, but that is a more significant refactoring.
197  if (Triple.getArch() == llvm::Triple::x86 ||
198  Triple.getArch() == llvm::Triple::ppc)
199  return "lib32";
200 
201  if (Triple.getArch() == llvm::Triple::x86_64 &&
202  Triple.getEnvironment() == llvm::Triple::GNUX32)
203  return "libx32";
204 
205  if (Triple.getArch() == llvm::Triple::riscv32)
206  return "lib32";
207 
208  return Triple.isArch32Bit() ? "lib" : "lib64";
209 }
210 
211 static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs,
212  const Multilib &Multilib,
213  StringRef InstallPath,
214  ToolChain::path_list &Paths) {
215  if (const auto &PathsCallback = Multilibs.filePathsCallback())
216  for (const auto &Path : PathsCallback(Multilib))
217  addPathIfExists(D, InstallPath + Path, Paths);
218 }
219 
220 Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
221  : Generic_ELF(D, Triple, Args) {
222  GCCInstallation.init(Triple, Args);
225  llvm::Triple::ArchType Arch = Triple.getArch();
226  std::string SysRoot = computeSysRoot();
227 
228  // Cross-compiling binutils and GCC installations (vanilla and openSUSE at
229  // least) put various tools in a triple-prefixed directory off of the parent
230  // of the GCC installation. We use the GCC triple here to ensure that we end
231  // up with tools that support the same amount of cross compiling as the
232  // detected GCC installation. For example, if we find a GCC installation
233  // targeting x86_64, but it is a bi-arch GCC installation, it can also be
234  // used to target i386.
235  // FIXME: This seems unlikely to be Linux-specific.
237  if (GCCInstallation.isValid()) {
238  PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
239  GCCInstallation.getTriple().str() + "/bin")
240  .str());
241  }
242 
243  Distro Distro(D.getVFS());
244 
245  if (Distro.IsAlpineLinux() || Triple.isAndroid()) {
246  ExtraOpts.push_back("-z");
247  ExtraOpts.push_back("now");
248  }
249 
251  Triple.isAndroid()) {
252  ExtraOpts.push_back("-z");
253  ExtraOpts.push_back("relro");
254  }
255 
256  // The lld default page size is too large for Aarch64, which produces much
257  // larger .so files and images for arm64 device targets. Use 4KB page size
258  // for Android arm64 targets instead.
259  if (Triple.isAArch64() && Triple.isAndroid()) {
260  ExtraOpts.push_back("-z");
261  ExtraOpts.push_back("max-page-size=4096");
262  }
263 
264  if (GCCInstallation.getParentLibPath().find("opt/rh/devtoolset") !=
265  StringRef::npos)
266  // With devtoolset on RHEL, we want to add a bin directory that is relative
267  // to the detected gcc install, because if we are using devtoolset gcc then
268  // we want to use other tools from devtoolset (e.g. ld) instead of the
269  // standard system tools.
270  PPaths.push_back(Twine(GCCInstallation.getParentLibPath() +
271  "/../bin").str());
272 
273  if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
274  ExtraOpts.push_back("-X");
275 
276  const bool IsAndroid = Triple.isAndroid();
277  const bool IsMips = Triple.isMIPS();
278  const bool IsHexagon = Arch == llvm::Triple::hexagon;
279  const bool IsRISCV = Triple.isRISCV();
280 
281  if (IsMips && !SysRoot.empty())
282  ExtraOpts.push_back("--sysroot=" + SysRoot);
283 
284  // Do not use 'gnu' hash style for Mips targets because .gnu.hash
285  // and the MIPS ABI require .dynsym to be sorted in different ways.
286  // .gnu.hash needs symbols to be grouped by hash code whereas the MIPS
287  // ABI requires a mapping between the GOT and the symbol table.
288  // Android loader does not support .gnu.hash until API 23.
289  // Hexagon linker/loader does not support .gnu.hash
290  if (!IsMips && !IsHexagon) {
293  (IsAndroid && !Triple.isAndroidVersionLT(23)))
294  ExtraOpts.push_back("--hash-style=gnu");
295 
296  if (Distro.IsDebian() || Distro.IsOpenSUSE() ||
299  (IsAndroid && Triple.isAndroidVersionLT(23)))
300  ExtraOpts.push_back("--hash-style=both");
301  }
302 
303 #ifdef ENABLE_LINKER_BUILD_ID
304  ExtraOpts.push_back("--build-id");
305 #endif
306 
307  if (IsAndroid || Distro.IsOpenSUSE())
308  ExtraOpts.push_back("--enable-new-dtags");
309 
310  // The selection of paths to try here is designed to match the patterns which
311  // the GCC driver itself uses, as this is part of the GCC-compatible driver.
312  // This was determined by running GCC in a fake filesystem, creating all
313  // possible permutations of these directories, and seeing which ones it added
314  // to the link paths.
315  path_list &Paths = getFilePaths();
316 
317  const std::string OSLibDir = getOSLibDir(Triple, Args);
318  const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
319 
320  // Add the multilib suffixed paths where they are available.
321  if (GCCInstallation.isValid()) {
322  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
323  const std::string &LibPath = GCCInstallation.getParentLibPath();
324 
325  // Add toolchain / multilib specific file paths.
328 
329  // Sourcery CodeBench MIPS toolchain holds some libraries under
330  // a biarch-like suffix of the GCC installation.
333  Paths);
334 
335  // GCC cross compiling toolchains will install target libraries which ship
336  // as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
337  // any part of the GCC installation in
338  // <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
339  // debatable, but is the reality today. We need to search this tree even
340  // when we have a sysroot somewhere else. It is the responsibility of
341  // whomever is doing the cross build targeting a sysroot using a GCC
342  // installation that is *not* within the system root to ensure two things:
343  //
344  // 1) Any DSOs that are linked in from this tree or from the install path
345  // above must be present on the system root and found via an
346  // appropriate rpath.
347  // 2) There must not be libraries installed into
348  // <prefix>/<triple>/<libdir> unless they should be preferred over
349  // those within the system root.
350  //
351  // Note that this matches the GCC behavior. See the below comment for where
352  // Clang diverges from GCC's behavior.
353  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" +
354  OSLibDir + SelectedMultilib.osSuffix(),
355  Paths);
356 
357  // If the GCC installation we found is inside of the sysroot, we want to
358  // prefer libraries installed in the parent prefix of the GCC installation.
359  // It is important to *not* use these paths when the GCC installation is
360  // outside of the system root as that can pick up unintended libraries.
361  // This usually happens when there is an external cross compiler on the
362  // host system, and a more minimal sysroot available that is the target of
363  // the cross. Note that GCC does include some of these directories in some
364  // configurations but this seems somewhere between questionable and simply
365  // a bug.
366  if (StringRef(LibPath).startswith(SysRoot)) {
367  addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths);
368  addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
369  }
370  }
371 
372  // Similar to the logic for GCC above, if we currently running Clang inside
373  // of the requested system root, add its parent library paths to
374  // those searched.
375  // FIXME: It's not clear whether we should use the driver's installed
376  // directory ('Dir' below) or the ResourceDir.
377  if (StringRef(D.Dir).startswith(SysRoot)) {
378  addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths);
379  addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths);
380  }
381 
382  addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
383  addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
384 
385  if (IsAndroid) {
386  // Android sysroots contain a library directory for each supported OS
387  // version as well as some unversioned libraries in the usual multiarch
388  // directory.
389  unsigned Major;
390  unsigned Minor;
391  unsigned Micro;
392  Triple.getEnvironmentVersion(Major, Minor, Micro);
393  addPathIfExists(D,
394  SysRoot + "/usr/lib/" + MultiarchTriple + "/" +
395  llvm::to_string(Major),
396  Paths);
397  }
398 
399  addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths);
400  // 64-bit OpenEmbedded sysroots may not have a /usr/lib dir. So they cannot
401  // find /usr/lib64 as it is referenced as /usr/lib/../lib64. So we handle
402  // this here.
403  if (Triple.getVendor() == llvm::Triple::OpenEmbedded &&
404  Triple.isArch64Bit())
405  addPathIfExists(D, SysRoot + "/usr/" + OSLibDir, Paths);
406  else
407  addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths);
408  if (IsRISCV) {
409  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
410  addPathIfExists(D, SysRoot + "/" + OSLibDir + "/" + ABIName, Paths);
411  addPathIfExists(D, SysRoot + "/usr/" + OSLibDir + "/" + ABIName, Paths);
412  }
413 
414  // Try walking via the GCC triple path in case of biarch or multiarch GCC
415  // installations with strange symlinks.
416  if (GCCInstallation.isValid()) {
417  addPathIfExists(D,
418  SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() +
419  "/../../" + OSLibDir,
420  Paths);
421 
422  // Add the 'other' biarch variant path
423  Multilib BiarchSibling;
424  if (GCCInstallation.getBiarchSibling(BiarchSibling)) {
426  BiarchSibling.gccSuffix(),
427  Paths);
428  }
429 
430  // See comments above on the multilib variant for details of why this is
431  // included even from outside the sysroot.
432  const std::string &LibPath = GCCInstallation.getParentLibPath();
433  const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
435  addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" +
436  Multilib.osSuffix(),
437  Paths);
438 
439  // See comments above on the multilib variant for details of why this is
440  // only included from within the sysroot.
441  if (StringRef(LibPath).startswith(SysRoot))
442  addPathIfExists(D, LibPath, Paths);
443  }
444 
445  // Similar to the logic for GCC above, if we are currently running Clang
446  // inside of the requested system root, add its parent library path to those
447  // searched.
448  // FIXME: It's not clear whether we should use the driver's installed
449  // directory ('Dir' below) or the ResourceDir.
450  if (StringRef(D.Dir).startswith(SysRoot))
451  addPathIfExists(D, D.Dir + "/../lib", Paths);
452 
453  addPathIfExists(D, SysRoot + "/lib", Paths);
454  addPathIfExists(D, SysRoot + "/usr/lib", Paths);
455 }
456 
458  if (getTriple().isAndroid())
459  return ToolChain::CST_Libcxx;
461 }
462 
463 bool Linux::HasNativeLLVMSupport() const { return true; }
464 
465 Tool *Linux::buildLinker() const { return new tools::gnutools::Linker(*this); }
466 
468  return new tools::gnutools::Assembler(*this);
469 }
470 
471 std::string Linux::computeSysRoot() const {
472  if (!getDriver().SysRoot.empty())
473  return getDriver().SysRoot;
474 
475  if (getTriple().isAndroid()) {
476  // Android toolchains typically include a sysroot at ../sysroot relative to
477  // the clang binary.
478  const StringRef ClangDir = getDriver().getInstalledDir();
479  std::string AndroidSysRootPath = (ClangDir + "/../sysroot").str();
480  if (getVFS().exists(AndroidSysRootPath))
481  return AndroidSysRootPath;
482  }
483 
484  if (!GCCInstallation.isValid() || !getTriple().isMIPS())
485  return std::string();
486 
487  // Standalone MIPS toolchains use different names for sysroot folder
488  // and put it into different places. Here we try to check some known
489  // variants.
490 
491  const StringRef InstallDir = GCCInstallation.getInstallPath();
492  const StringRef TripleStr = GCCInstallation.getTriple().str();
494 
495  std::string Path =
496  (InstallDir + "/../../../../" + TripleStr + "/libc" + Multilib.osSuffix())
497  .str();
498 
499  if (getVFS().exists(Path))
500  return Path;
501 
502  Path = (InstallDir + "/../../../../sysroot" + Multilib.osSuffix()).str();
503 
504  if (getVFS().exists(Path))
505  return Path;
506 
507  return std::string();
508 }
509 
510 std::string Linux::getDynamicLinker(const ArgList &Args) const {
511  const llvm::Triple::ArchType Arch = getArch();
512  const llvm::Triple &Triple = getTriple();
513 
514  const Distro Distro(getDriver().getVFS());
515 
516  if (Triple.isAndroid())
517  return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker";
518 
519  if (Triple.isMusl()) {
520  std::string ArchName;
521  bool IsArm = false;
522 
523  switch (Arch) {
524  case llvm::Triple::arm:
525  case llvm::Triple::thumb:
526  ArchName = "arm";
527  IsArm = true;
528  break;
529  case llvm::Triple::armeb:
530  case llvm::Triple::thumbeb:
531  ArchName = "armeb";
532  IsArm = true;
533  break;
534  default:
535  ArchName = Triple.getArchName().str();
536  }
537  if (IsArm &&
538  (Triple.getEnvironment() == llvm::Triple::MuslEABIHF ||
540  ArchName += "hf";
541 
542  return "/lib/ld-musl-" + ArchName + ".so.1";
543  }
544 
545  std::string LibDir;
546  std::string Loader;
547 
548  switch (Arch) {
549  default:
550  llvm_unreachable("unsupported architecture");
551 
552  case llvm::Triple::aarch64:
553  LibDir = "lib";
554  Loader = "ld-linux-aarch64.so.1";
555  break;
556  case llvm::Triple::aarch64_be:
557  LibDir = "lib";
558  Loader = "ld-linux-aarch64_be.so.1";
559  break;
560  case llvm::Triple::arm:
561  case llvm::Triple::thumb:
562  case llvm::Triple::armeb:
563  case llvm::Triple::thumbeb: {
564  const bool HF =
565  Triple.getEnvironment() == llvm::Triple::GNUEABIHF ||
567 
568  LibDir = "lib";
569  Loader = HF ? "ld-linux-armhf.so.3" : "ld-linux.so.3";
570  break;
571  }
572  case llvm::Triple::mips:
573  case llvm::Triple::mipsel:
574  case llvm::Triple::mips64:
575  case llvm::Triple::mips64el: {
576  bool IsNaN2008 = tools::mips::isNaN2008(Args, Triple);
577 
578  LibDir = "lib" + tools::mips::getMipsABILibSuffix(Args, Triple);
579 
580  if (tools::mips::isUCLibc(Args))
581  Loader = IsNaN2008 ? "ld-uClibc-mipsn8.so.0" : "ld-uClibc.so.0";
582  else if (!Triple.hasEnvironment() &&
583  Triple.getVendor() == llvm::Triple::VendorType::MipsTechnologies)
584  Loader =
585  Triple.isLittleEndian() ? "ld-musl-mipsel.so.1" : "ld-musl-mips.so.1";
586  else
587  Loader = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1";
588 
589  break;
590  }
591  case llvm::Triple::ppc:
592  LibDir = "lib";
593  Loader = "ld.so.1";
594  break;
595  case llvm::Triple::ppc64:
596  LibDir = "lib64";
597  Loader =
598  (tools::ppc::hasPPCAbiArg(Args, "elfv2")) ? "ld64.so.2" : "ld64.so.1";
599  break;
600  case llvm::Triple::ppc64le:
601  LibDir = "lib64";
602  Loader =
603  (tools::ppc::hasPPCAbiArg(Args, "elfv1")) ? "ld64.so.1" : "ld64.so.2";
604  break;
605  case llvm::Triple::riscv32: {
606  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
607  LibDir = "lib";
608  Loader = ("ld-linux-riscv32-" + ABIName + ".so.1").str();
609  break;
610  }
611  case llvm::Triple::riscv64: {
612  StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple);
613  LibDir = "lib";
614  Loader = ("ld-linux-riscv64-" + ABIName + ".so.1").str();
615  break;
616  }
617  case llvm::Triple::sparc:
618  case llvm::Triple::sparcel:
619  LibDir = "lib";
620  Loader = "ld-linux.so.2";
621  break;
622  case llvm::Triple::sparcv9:
623  LibDir = "lib64";
624  Loader = "ld-linux.so.2";
625  break;
626  case llvm::Triple::systemz:
627  LibDir = "lib";
628  Loader = "ld64.so.1";
629  break;
630  case llvm::Triple::x86:
631  LibDir = "lib";
632  Loader = "ld-linux.so.2";
633  break;
634  case llvm::Triple::x86_64: {
635  bool X32 = Triple.getEnvironment() == llvm::Triple::GNUX32;
636 
637  LibDir = X32 ? "libx32" : "lib64";
638  Loader = X32 ? "ld-linux-x32.so.2" : "ld-linux-x86-64.so.2";
639  break;
640  }
641  }
642 
643  if (Distro == Distro::Exherbo &&
644  (Triple.getVendor() == llvm::Triple::UnknownVendor ||
645  Triple.getVendor() == llvm::Triple::PC))
646  return "/usr/" + Triple.str() + "/lib/" + Loader;
647  return "/" + LibDir + "/" + Loader;
648 }
649 
650 void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
651  ArgStringList &CC1Args) const {
652  const Driver &D = getDriver();
653  std::string SysRoot = computeSysRoot();
654 
655  if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
656  return;
657 
658  if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
659  addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include");
660 
661  SmallString<128> ResourceDirInclude(D.ResourceDir);
662  llvm::sys::path::append(ResourceDirInclude, "include");
663  if (!DriverArgs.hasArg(options::OPT_nobuiltininc) &&
664  (!getTriple().isMusl() || DriverArgs.hasArg(options::OPT_nostdlibinc)))
665  addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude);
666 
667  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
668  return;
669 
670  // Check for configure-time C include directories.
671  StringRef CIncludeDirs(C_INCLUDE_DIRS);
672  if (CIncludeDirs != "") {
674  CIncludeDirs.split(dirs, ":");
675  for (StringRef dir : dirs) {
676  StringRef Prefix =
677  llvm::sys::path::is_absolute(dir) ? StringRef(SysRoot) : "";
678  addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
679  }
680  return;
681  }
682 
683  // Lacking those, try to detect the correct set of system includes for the
684  // target triple.
685 
686  // Add include directories specific to the selected multilib set and multilib.
687  if (GCCInstallation.isValid()) {
688  const auto &Callback = Multilibs.includeDirsCallback();
689  if (Callback) {
690  for (const auto &Path : Callback(GCCInstallation.getMultilib()))
692  DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path);
693  }
694  }
695 
696  // Implement generic Debian multiarch support.
697  const StringRef X86_64MultiarchIncludeDirs[] = {
698  "/usr/include/x86_64-linux-gnu",
699 
700  // FIXME: These are older forms of multiarch. It's not clear that they're
701  // in use in any released version of Debian, so we should consider
702  // removing them.
703  "/usr/include/i686-linux-gnu/64", "/usr/include/i486-linux-gnu/64"};
704  const StringRef X86MultiarchIncludeDirs[] = {
705  "/usr/include/i386-linux-gnu",
706 
707  // FIXME: These are older forms of multiarch. It's not clear that they're
708  // in use in any released version of Debian, so we should consider
709  // removing them.
710  "/usr/include/x86_64-linux-gnu/32", "/usr/include/i686-linux-gnu",
711  "/usr/include/i486-linux-gnu"};
712  const StringRef AArch64MultiarchIncludeDirs[] = {
713  "/usr/include/aarch64-linux-gnu"};
714  const StringRef ARMMultiarchIncludeDirs[] = {
715  "/usr/include/arm-linux-gnueabi"};
716  const StringRef ARMHFMultiarchIncludeDirs[] = {
717  "/usr/include/arm-linux-gnueabihf"};
718  const StringRef ARMEBMultiarchIncludeDirs[] = {
719  "/usr/include/armeb-linux-gnueabi"};
720  const StringRef ARMEBHFMultiarchIncludeDirs[] = {
721  "/usr/include/armeb-linux-gnueabihf"};
722  const StringRef MIPSMultiarchIncludeDirs[] = {"/usr/include/mips-linux-gnu"};
723  const StringRef MIPSELMultiarchIncludeDirs[] = {
724  "/usr/include/mipsel-linux-gnu"};
725  const StringRef MIPS64MultiarchIncludeDirs[] = {
726  "/usr/include/mips64-linux-gnuabi64"};
727  const StringRef MIPS64ELMultiarchIncludeDirs[] = {
728  "/usr/include/mips64el-linux-gnuabi64"};
729  const StringRef MIPSN32MultiarchIncludeDirs[] = {
730  "/usr/include/mips64-linux-gnuabin32"};
731  const StringRef MIPSN32ELMultiarchIncludeDirs[] = {
732  "/usr/include/mips64el-linux-gnuabin32"};
733  const StringRef MIPSR6MultiarchIncludeDirs[] = {
734  "/usr/include/mipsisa32-linux-gnu"};
735  const StringRef MIPSR6ELMultiarchIncludeDirs[] = {
736  "/usr/include/mipsisa32r6el-linux-gnu"};
737  const StringRef MIPS64R6MultiarchIncludeDirs[] = {
738  "/usr/include/mipsisa64r6-linux-gnuabi64"};
739  const StringRef MIPS64R6ELMultiarchIncludeDirs[] = {
740  "/usr/include/mipsisa64r6el-linux-gnuabi64"};
741  const StringRef MIPSN32R6MultiarchIncludeDirs[] = {
742  "/usr/include/mipsisa64r6-linux-gnuabin32"};
743  const StringRef MIPSN32R6ELMultiarchIncludeDirs[] = {
744  "/usr/include/mipsisa64r6el-linux-gnuabin32"};
745  const StringRef PPCMultiarchIncludeDirs[] = {
746  "/usr/include/powerpc-linux-gnu",
747  "/usr/include/powerpc-linux-gnuspe"};
748  const StringRef PPC64MultiarchIncludeDirs[] = {
749  "/usr/include/powerpc64-linux-gnu"};
750  const StringRef PPC64LEMultiarchIncludeDirs[] = {
751  "/usr/include/powerpc64le-linux-gnu"};
752  const StringRef SparcMultiarchIncludeDirs[] = {
753  "/usr/include/sparc-linux-gnu"};
754  const StringRef Sparc64MultiarchIncludeDirs[] = {
755  "/usr/include/sparc64-linux-gnu"};
756  const StringRef SYSTEMZMultiarchIncludeDirs[] = {
757  "/usr/include/s390x-linux-gnu"};
758  ArrayRef<StringRef> MultiarchIncludeDirs;
759  switch (getTriple().getArch()) {
760  case llvm::Triple::x86_64:
761  MultiarchIncludeDirs = X86_64MultiarchIncludeDirs;
762  break;
763  case llvm::Triple::x86:
764  MultiarchIncludeDirs = X86MultiarchIncludeDirs;
765  break;
766  case llvm::Triple::aarch64:
767  case llvm::Triple::aarch64_be:
768  MultiarchIncludeDirs = AArch64MultiarchIncludeDirs;
769  break;
770  case llvm::Triple::arm:
771  case llvm::Triple::thumb:
772  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
773  MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs;
774  else
775  MultiarchIncludeDirs = ARMMultiarchIncludeDirs;
776  break;
777  case llvm::Triple::armeb:
778  case llvm::Triple::thumbeb:
779  if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
780  MultiarchIncludeDirs = ARMEBHFMultiarchIncludeDirs;
781  else
782  MultiarchIncludeDirs = ARMEBMultiarchIncludeDirs;
783  break;
784  case llvm::Triple::mips:
785  if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6)
786  MultiarchIncludeDirs = MIPSR6MultiarchIncludeDirs;
787  else
788  MultiarchIncludeDirs = MIPSMultiarchIncludeDirs;
789  break;
790  case llvm::Triple::mipsel:
791  if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6)
792  MultiarchIncludeDirs = MIPSR6ELMultiarchIncludeDirs;
793  else
794  MultiarchIncludeDirs = MIPSELMultiarchIncludeDirs;
795  break;
796  case llvm::Triple::mips64:
797  if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6)
798  if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32)
799  MultiarchIncludeDirs = MIPSN32R6MultiarchIncludeDirs;
800  else
801  MultiarchIncludeDirs = MIPS64R6MultiarchIncludeDirs;
802  else if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32)
803  MultiarchIncludeDirs = MIPSN32MultiarchIncludeDirs;
804  else
805  MultiarchIncludeDirs = MIPS64MultiarchIncludeDirs;
806  break;
807  case llvm::Triple::mips64el:
808  if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6)
809  if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32)
810  MultiarchIncludeDirs = MIPSN32R6ELMultiarchIncludeDirs;
811  else
812  MultiarchIncludeDirs = MIPS64R6ELMultiarchIncludeDirs;
813  else if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32)
814  MultiarchIncludeDirs = MIPSN32ELMultiarchIncludeDirs;
815  else
816  MultiarchIncludeDirs = MIPS64ELMultiarchIncludeDirs;
817  break;
818  case llvm::Triple::ppc:
819  MultiarchIncludeDirs = PPCMultiarchIncludeDirs;
820  break;
821  case llvm::Triple::ppc64:
822  MultiarchIncludeDirs = PPC64MultiarchIncludeDirs;
823  break;
824  case llvm::Triple::ppc64le:
825  MultiarchIncludeDirs = PPC64LEMultiarchIncludeDirs;
826  break;
827  case llvm::Triple::sparc:
828  MultiarchIncludeDirs = SparcMultiarchIncludeDirs;
829  break;
830  case llvm::Triple::sparcv9:
831  MultiarchIncludeDirs = Sparc64MultiarchIncludeDirs;
832  break;
833  case llvm::Triple::systemz:
834  MultiarchIncludeDirs = SYSTEMZMultiarchIncludeDirs;
835  break;
836  default:
837  break;
838  }
839 
840  const std::string AndroidMultiarchIncludeDir =
841  std::string("/usr/include/") +
842  getMultiarchTriple(D, getTriple(), SysRoot);
843  const StringRef AndroidMultiarchIncludeDirs[] = {AndroidMultiarchIncludeDir};
844  if (getTriple().isAndroid())
845  MultiarchIncludeDirs = AndroidMultiarchIncludeDirs;
846 
847  for (StringRef Dir : MultiarchIncludeDirs) {
848  if (D.getVFS().exists(SysRoot + Dir)) {
849  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + Dir);
850  break;
851  }
852  }
853 
854  if (getTriple().getOS() == llvm::Triple::RTEMS)
855  return;
856 
857  // Add an include of '/include' directly. This isn't provided by default by
858  // system GCCs, but is often used with cross-compiling GCCs, and harmless to
859  // add even when Clang is acting as-if it were a system compiler.
860  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include");
861 
862  addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include");
863 
864  if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && getTriple().isMusl())
865  addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude);
866 }
867 
868 static std::string DetectLibcxxIncludePath(llvm::vfs::FileSystem &vfs,
869  StringRef base) {
870  std::error_code EC;
871  int MaxVersion = 0;
872  std::string MaxVersionString = "";
873  for (llvm::vfs::directory_iterator LI = vfs.dir_begin(base, EC), LE;
874  !EC && LI != LE; LI = LI.increment(EC)) {
875  StringRef VersionText = llvm::sys::path::filename(LI->path());
876  int Version;
877  if (VersionText[0] == 'v' &&
878  !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) {
879  if (Version > MaxVersion) {
880  MaxVersion = Version;
881  MaxVersionString = VersionText;
882  }
883  }
884  }
885  return MaxVersion ? (base + "/" + MaxVersionString).str() : "";
886 }
887 
888 void Linux::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
889  llvm::opt::ArgStringList &CC1Args) const {
890  const std::string& SysRoot = computeSysRoot();
891  const std::string LibCXXIncludePathCandidates[] = {
892  DetectLibcxxIncludePath(getVFS(), getDriver().Dir + "/../include/c++"),
893  // If this is a development, non-installed, clang, libcxx will
894  // not be found at ../include/c++ but it likely to be found at
895  // one of the following two locations:
896  DetectLibcxxIncludePath(getVFS(), SysRoot + "/usr/local/include/c++"),
897  DetectLibcxxIncludePath(getVFS(), SysRoot + "/usr/include/c++") };
898  for (const auto &IncludePath : LibCXXIncludePathCandidates) {
899  if (IncludePath.empty() || !getVFS().exists(IncludePath))
900  continue;
901  // Use the first candidate that exists.
902  addSystemInclude(DriverArgs, CC1Args, IncludePath);
903  return;
904  }
905 }
906 
907 void Linux::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
908  llvm::opt::ArgStringList &CC1Args) const {
909  // We need a detected GCC installation on Linux to provide libstdc++'s
910  // headers.
911  if (!GCCInstallation.isValid())
912  return;
913 
914  // By default, look for the C++ headers in an include directory adjacent to
915  // the lib directory of the GCC installation. Note that this is expect to be
916  // equivalent to '/usr/include/c++/X.Y' in almost all cases.
917  StringRef LibDir = GCCInstallation.getParentLibPath();
918  StringRef InstallDir = GCCInstallation.getInstallPath();
919  StringRef TripleStr = GCCInstallation.getTriple().str();
921  const std::string GCCMultiarchTriple = getMultiarchTriple(
923  const std::string TargetMultiarchTriple =
925  const GCCVersion &Version = GCCInstallation.getVersion();
926 
927  // The primary search for libstdc++ supports multiarch variants.
928  if (addLibStdCXXIncludePaths(LibDir.str() + "/../include",
929  "/c++/" + Version.Text, TripleStr,
930  GCCMultiarchTriple, TargetMultiarchTriple,
931  Multilib.includeSuffix(), DriverArgs, CC1Args))
932  return;
933 
934  // Otherwise, fall back on a bunch of options which don't use multiarch
935  // layouts for simplicity.
936  const std::string LibStdCXXIncludePathCandidates[] = {
937  // Gentoo is weird and places its headers inside the GCC install,
938  // so if the first attempt to find the headers fails, try these patterns.
939  InstallDir.str() + "/include/g++-v" + Version.Text,
940  InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." +
941  Version.MinorStr,
942  InstallDir.str() + "/include/g++-v" + Version.MajorStr,
943  // Android standalone toolchain has C++ headers in yet another place.
944  LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
945  // Freescale SDK C++ headers are directly in <sysroot>/usr/include/c++,
946  // without a subdirectory corresponding to the gcc version.
947  LibDir.str() + "/../include/c++",
948  // Cray's gcc installation puts headers under "g++" without a
949  // version suffix.
950  LibDir.str() + "/../include/g++",
951  };
952 
953  for (const auto &IncludePath : LibStdCXXIncludePathCandidates) {
954  if (addLibStdCXXIncludePaths(IncludePath, /*Suffix*/ "", TripleStr,
955  /*GCCMultiarchTriple*/ "",
956  /*TargetMultiarchTriple*/ "",
957  Multilib.includeSuffix(), DriverArgs, CC1Args))
958  break;
959  }
960 }
961 
962 void Linux::AddCudaIncludeArgs(const ArgList &DriverArgs,
963  ArgStringList &CC1Args) const {
964  CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
965 }
966 
967 void Linux::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
968  ArgStringList &CC1Args) const {
969  if (GCCInstallation.isValid()) {
970  CC1Args.push_back("-isystem");
971  CC1Args.push_back(DriverArgs.MakeArgString(
972  GCCInstallation.getParentLibPath() + "/../" +
973  GCCInstallation.getTriple().str() + "/include"));
974  }
975 }
976 
977 bool Linux::isPIEDefault() const {
978  return (getTriple().isAndroid() && !getTriple().isAndroidVersionLT(16)) ||
979  getTriple().isMusl() || getSanitizerArgs().requiresPIE();
980 }
981 
983  return getTriple().isAndroid();
984 }
985 
987  if (getTriple().isAndroid())
988  return false;
990 }
991 
993  const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
994  const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
995  const bool IsMIPS = getTriple().isMIPS32();
996  const bool IsMIPS64 = getTriple().isMIPS64();
997  const bool IsPowerPC64 = getTriple().getArch() == llvm::Triple::ppc64 ||
998  getTriple().getArch() == llvm::Triple::ppc64le;
999  const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64 ||
1000  getTriple().getArch() == llvm::Triple::aarch64_be;
1001  const bool IsArmArch = getTriple().getArch() == llvm::Triple::arm ||
1002  getTriple().getArch() == llvm::Triple::thumb ||
1003  getTriple().getArch() == llvm::Triple::armeb ||
1004  getTriple().getArch() == llvm::Triple::thumbeb;
1006  Res |= SanitizerKind::Address;
1007  Res |= SanitizerKind::PointerCompare;
1008  Res |= SanitizerKind::PointerSubtract;
1009  Res |= SanitizerKind::Fuzzer;
1010  Res |= SanitizerKind::FuzzerNoLink;
1011  Res |= SanitizerKind::KernelAddress;
1012  Res |= SanitizerKind::Memory;
1013  Res |= SanitizerKind::Vptr;
1014  Res |= SanitizerKind::SafeStack;
1015  if (IsX86_64 || IsMIPS64 || IsAArch64)
1016  Res |= SanitizerKind::DataFlow;
1017  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsArmArch || IsPowerPC64)
1018  Res |= SanitizerKind::Leak;
1019  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64)
1020  Res |= SanitizerKind::Thread;
1021  if (IsX86_64)
1022  Res |= SanitizerKind::KernelMemory;
1023  if (IsX86 || IsX86_64)
1024  Res |= SanitizerKind::Function;
1025  if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch ||
1026  IsPowerPC64)
1027  Res |= SanitizerKind::Scudo;
1028  if (IsX86_64 || IsAArch64) {
1029  Res |= SanitizerKind::HWAddress;
1030  Res |= SanitizerKind::KernelHWAddress;
1031  }
1032  return Res;
1033 }
1034 
1035 void Linux::addProfileRTLibs(const llvm::opt::ArgList &Args,
1036  llvm::opt::ArgStringList &CmdArgs) const {
1037  if (!needsProfileRT(Args)) return;
1038 
1039  // Add linker option -u__llvm_runtime_variable to cause runtime
1040  // initialization module to be linked in.
1041  if ((!Args.hasArg(options::OPT_coverage)) &&
1042  (!Args.hasArg(options::OPT_ftest_coverage)))
1043  CmdArgs.push_back(Args.MakeArgString(
1044  Twine("-u", llvm::getInstrProfRuntimeHookVarName())));
1045  ToolChain::addProfileRTLibs(Args, CmdArgs);
1046 }
bool isNoExecStackDefault() const override
Test whether this toolchaind defaults to non-executable stacks.
Definition: Linux.cpp:982
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:816
bool isPIEDefault() const override
Test whether this toolchain defaults to PIE.
Definition: Linux.cpp:977
virtual std::string getDynamicLinker(const llvm::opt::ArgList &Args) const
Definition: Linux.cpp:510
static void addExternCSystemIncludeIfExists(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Definition: ToolChain.cpp:823
bool getBiarchSibling(Multilib &M) const
Get the biarch sibling multilib (if it exists).
Definition: Gnu.cpp:1867
const IncludeDirsFunc & includeDirsCallback() const
Definition: Multilib.h:179
const llvm::Triple & getTriple() const
Get the GCC triple for the detected install.
Definition: Gnu.h:219
SanitizerMask getSupportedSanitizers() const override
Return sanitizers which are available in this toolchain.
Definition: Linux.cpp:992
StringRef getOS() const
Definition: ToolChain.h:216
bool IsOpenSUSE() const
Definition: Distro.h:112
constexpr XRayInstrMask Function
Definition: XRayInstr.h:38
const IncludeDirsFunc & filePathsCallback() const
Definition: Multilib.h:186
void addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Definition: Linux.cpp:907
Struct to store and manipulate GCC versions.
Definition: Gnu.h:156
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:729
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:962
GCCInstallationDetector GCCInstallation
Definition: Gnu.h:279
path_list & getProgramPaths()
Definition: ToolChain.h:238
Distro - Helper class for detecting and classifying Linux distributions.
Definition: Distro.h:22
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:463
std::string Dir
The path the driver executable was in, as invoked from the command line.
Definition: Driver.h:119
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:169
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:471
const std::string & osSuffix() const
Get the detected os path suffix for the multi-arch target variant.
Definition: Multilib.h:56
path_list & getFilePaths()
Definition: ToolChain.h:235
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)
CXXStdlibType GetDefaultCXXStdlibType() const override
Definition: Linux.cpp:457
llvm::vfs::FileSystem & getVFS() const
Definition: Driver.h:307
const GCCVersion & getVersion() const
Get the detected GCC version string.
Definition: Gnu.h:238
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:650
StringRef getRISCVABI(const llvm::opt::ArgList &Args, const llvm::Triple &Triple)
CudaInstallationDetector CudaInstallation
Definition: Gnu.h:280
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:1035
This corresponds to a single GCC Multilib, or a segment of one controlled by a command line flag...
Definition: Multilib.h:28
static std::string DetectLibcxxIncludePath(llvm::vfs::FileSystem &vfs, StringRef base)
Definition: Linux.cpp:868
virtual bool IsMathErrnoDefault() const
IsMathErrnoDefault - Does this tool chain use -fmath-errno by default.
Definition: ToolChain.h:341
bool IsDebian() const
Definition: Distro.h:116
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:213
void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
Definition: Cuda.cpp:232
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:40
void AddIAMCUIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add arguments to use MCU GCC toolchain includes.
Definition: Linux.cpp:967
const Driver & getDriver() const
Definition: ToolChain.h:197
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:471
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:801
StringRef getParentLibPath() const
Get the detected GCC parent lib path.
Definition: Gnu.h:225
bool IsMathErrnoDefault() const override
IsMathErrnoDefault - Does this tool chain use -fmath-errno by default.
Definition: Linux.cpp:986
llvm::vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:98
bool IsAlpineLinux() const
Definition: Distro.h:124
static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs, const Multilib &Multilib, StringRef InstallPath, ToolChain::path_list &Paths)
Definition: Linux.cpp:211
Dataflow Directional Tag Classes.
std::string SysRoot
sysroot, if present
Definition: Driver.h:147
Tool - Information on a specific compilation tool.
Definition: Tool.h:33
const SanitizerArgs & getSanitizerArgs() const
Definition: ToolChain.cpp:116
const char * getInstalledDir() const
Get the path to where the clang executable was installed.
Definition: Driver.h:326
std::string MajorStr
The text of the parsed major, and major+minor versions.
Definition: Gnu.h:164
std::string Text
The unparsed text of the version.
Definition: Gnu.h:158
Tool * buildLinker() const override
Definition: Linux.cpp:465
const llvm::Triple & getTriple() const
Definition: ToolChain.h:199
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:923
bool IsRedhat() const
Definition: Distro.h:108
bool IsUbuntu() const
Definition: Distro.h:120
bool LE(InterpState &S, CodePtr OpPC)
Definition: Interp.h:240
void addPathIfExists(const Driver &D, const Twine &Path, ToolChain::path_list &Paths)
Definition: CommonArgs.cpp:65
Tool * buildAssembler() const override
Definition: Linux.cpp:467
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:2635
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:1759
const MultilibSet & getMultilibs() const
Get the whole MultilibSet.
Definition: Gnu.h:231
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:888
std::vector< std::string > ExtraOpts
Definition: Linux.h:50
std::string getMipsABILibSuffix(const llvm::opt::ArgList &Args, const llvm::Triple &Triple)
StringRef getInstallPath() const
Get the detected GCC installation path.
Definition: Gnu.h:222
const Multilib & getMultilib() const
Get the detected Multilib.
Definition: Gnu.h:228
Linux(const Driver &D, const llvm::Triple &Triple, const llvm::opt::ArgList &Args)
Definition: Linux.cpp:220
std::string ResourceDir
The path to the compiler resource directory.
Definition: Driver.h:131
bool isValid() const
Check whether we detected a valid GCC install.
Definition: Gnu.h:216