clang  7.0.0svn
ToolChain.cpp
Go to the documentation of this file.
1 //===- ToolChain.cpp - Collections of tools for one platform --------------===//
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 "clang/Driver/ToolChain.h"
11 #include "InputInfo.h"
12 #include "ToolChains/Arch/ARM.h"
13 #include "ToolChains/Clang.h"
15 #include "clang/Basic/Sanitizers.h"
18 #include "clang/Config/config.h"
19 #include "clang/Driver/Action.h"
20 #include "clang/Driver/Driver.h"
22 #include "clang/Driver/Job.h"
23 #include "clang/Driver/Options.h"
25 #include "clang/Driver/XRayArgs.h"
26 #include "llvm/ADT/STLExtras.h"
27 #include "llvm/ADT/SmallString.h"
28 #include "llvm/ADT/StringRef.h"
29 #include "llvm/ADT/Triple.h"
30 #include "llvm/ADT/Twine.h"
31 #include "llvm/Config/llvm-config.h"
32 #include "llvm/Option/Arg.h"
33 #include "llvm/Option/ArgList.h"
34 #include "llvm/Option/OptTable.h"
35 #include "llvm/Option/Option.h"
36 #include "llvm/Support/ErrorHandling.h"
37 #include "llvm/Support/FileSystem.h"
38 #include "llvm/Support/Path.h"
39 #include "llvm/MC/MCTargetOptions.h"
40 #include "llvm/Support/TargetParser.h"
41 #include "llvm/Support/TargetRegistry.h"
42 #include <cassert>
43 #include <cstddef>
44 #include <cstring>
45 #include <string>
46 
47 using namespace clang;
48 using namespace driver;
49 using namespace tools;
50 using namespace llvm;
51 using namespace llvm::opt;
52 
53 static llvm::opt::Arg *GetRTTIArgument(const ArgList &Args) {
54  return Args.getLastArg(options::OPT_mkernel, options::OPT_fapple_kext,
55  options::OPT_fno_rtti, options::OPT_frtti);
56 }
57 
58 static ToolChain::RTTIMode CalculateRTTIMode(const ArgList &Args,
59  const llvm::Triple &Triple,
60  const Arg *CachedRTTIArg) {
61  // Explicit rtti/no-rtti args
62  if (CachedRTTIArg) {
63  if (CachedRTTIArg->getOption().matches(options::OPT_frtti))
65  else
67  }
68 
69  // -frtti is default, except for the PS4 CPU.
70  if (!Triple.isPS4CPU())
72 
73  // On the PS4, turning on c++ exceptions turns on rtti.
74  // We're assuming that, if we see -fexceptions, rtti gets turned on.
75  Arg *Exceptions = Args.getLastArgNoClaim(
76  options::OPT_fcxx_exceptions, options::OPT_fno_cxx_exceptions,
77  options::OPT_fexceptions, options::OPT_fno_exceptions);
78  if (Exceptions &&
79  (Exceptions->getOption().matches(options::OPT_fexceptions) ||
80  Exceptions->getOption().matches(options::OPT_fcxx_exceptions)))
82 
84 }
85 
86 ToolChain::ToolChain(const Driver &D, const llvm::Triple &T,
87  const ArgList &Args)
88  : D(D), Triple(T), Args(Args), CachedRTTIArg(GetRTTIArgument(Args)),
89  CachedRTTIMode(CalculateRTTIMode(Args, Triple, CachedRTTIArg)) {
90  std::string CandidateLibPath = getArchSpecificLibPath();
91  if (getVFS().exists(CandidateLibPath))
92  getFilePaths().push_back(CandidateLibPath);
93 }
94 
95 void ToolChain::setTripleEnvironment(llvm::Triple::EnvironmentType Env) {
96  Triple.setEnvironment(Env);
97  if (EffectiveTriple != llvm::Triple())
98  EffectiveTriple.setEnvironment(Env);
99 }
100 
101 ToolChain::~ToolChain() = default;
102 
104 
106  return Args.hasFlag(options::OPT_fintegrated_as,
107  options::OPT_fno_integrated_as,
109 }
110 
112  return ENABLE_X86_RELAX_RELOCATIONS;
113 }
114 
116  if (!SanitizerArguments.get())
117  SanitizerArguments.reset(new SanitizerArgs(*this, Args));
118  return *SanitizerArguments.get();
119 }
120 
122  if (!XRayArguments.get())
123  XRayArguments.reset(new XRayArgs(*this, Args));
124  return *XRayArguments.get();
125 }
126 
127 namespace {
128 
129 struct DriverSuffix {
130  const char *Suffix;
131  const char *ModeFlag;
132 };
133 
134 } // namespace
135 
136 static const DriverSuffix *FindDriverSuffix(StringRef ProgName, size_t &Pos) {
137  // A list of known driver suffixes. Suffixes are compared against the
138  // program name in order. If there is a match, the frontend type is updated as
139  // necessary by applying the ModeFlag.
140  static const DriverSuffix DriverSuffixes[] = {
141  {"clang", nullptr},
142  {"clang++", "--driver-mode=g++"},
143  {"clang-c++", "--driver-mode=g++"},
144  {"clang-cc", nullptr},
145  {"clang-cpp", "--driver-mode=cpp"},
146  {"clang-g++", "--driver-mode=g++"},
147  {"clang-gcc", nullptr},
148  {"clang-cl", "--driver-mode=cl"},
149  {"cc", nullptr},
150  {"cpp", "--driver-mode=cpp"},
151  {"cl", "--driver-mode=cl"},
152  {"++", "--driver-mode=g++"},
153  };
154 
155  for (size_t i = 0; i < llvm::array_lengthof(DriverSuffixes); ++i) {
156  StringRef Suffix(DriverSuffixes[i].Suffix);
157  if (ProgName.endswith(Suffix)) {
158  Pos = ProgName.size() - Suffix.size();
159  return &DriverSuffixes[i];
160  }
161  }
162  return nullptr;
163 }
164 
165 /// Normalize the program name from argv[0] by stripping the file extension if
166 /// present and lower-casing the string on Windows.
167 static std::string normalizeProgramName(llvm::StringRef Argv0) {
168  std::string ProgName = llvm::sys::path::stem(Argv0);
169 #ifdef LLVM_ON_WIN32
170  // Transform to lowercase for case insensitive file systems.
171  std::transform(ProgName.begin(), ProgName.end(), ProgName.begin(), ::tolower);
172 #endif
173  return ProgName;
174 }
175 
176 static const DriverSuffix *parseDriverSuffix(StringRef ProgName, size_t &Pos) {
177  // Try to infer frontend type and default target from the program name by
178  // comparing it against DriverSuffixes in order.
179 
180  // If there is a match, the function tries to identify a target as prefix.
181  // E.g. "x86_64-linux-clang" as interpreted as suffix "clang" with target
182  // prefix "x86_64-linux". If such a target prefix is found, it may be
183  // added via -target as implicit first argument.
184  const DriverSuffix *DS = FindDriverSuffix(ProgName, Pos);
185 
186  if (!DS) {
187  // Try again after stripping any trailing version number:
188  // clang++3.5 -> clang++
189  ProgName = ProgName.rtrim("0123456789.");
190  DS = FindDriverSuffix(ProgName, Pos);
191  }
192 
193  if (!DS) {
194  // Try again after stripping trailing -component.
195  // clang++-tot -> clang++
196  ProgName = ProgName.slice(0, ProgName.rfind('-'));
197  DS = FindDriverSuffix(ProgName, Pos);
198  }
199  return DS;
200 }
201 
204  std::string ProgName = normalizeProgramName(PN);
205  size_t SuffixPos;
206  const DriverSuffix *DS = parseDriverSuffix(ProgName, SuffixPos);
207  if (!DS)
208  return {};
209  size_t SuffixEnd = SuffixPos + strlen(DS->Suffix);
210 
211  size_t LastComponent = ProgName.rfind('-', SuffixPos);
212  if (LastComponent == std::string::npos)
213  return ParsedClangName(ProgName.substr(0, SuffixEnd), DS->ModeFlag);
214  std::string ModeSuffix = ProgName.substr(LastComponent + 1,
215  SuffixEnd - LastComponent - 1);
216 
217  // Infer target from the prefix.
218  StringRef Prefix(ProgName);
219  Prefix = Prefix.slice(0, LastComponent);
220  std::string IgnoredError;
221  bool IsRegistered = llvm::TargetRegistry::lookupTarget(Prefix, IgnoredError);
222  return ParsedClangName{Prefix, ModeSuffix, DS->ModeFlag, IsRegistered};
223 }
224 
226  // In universal driver terms, the arch name accepted by -arch isn't exactly
227  // the same as the ones that appear in the triple. Roughly speaking, this is
228  // an inverse of the darwin::getArchTypeForDarwinArchName() function, but the
229  // only interesting special case is powerpc.
230  switch (Triple.getArch()) {
231  case llvm::Triple::ppc:
232  return "ppc";
233  case llvm::Triple::ppc64:
234  return "ppc64";
235  case llvm::Triple::ppc64le:
236  return "ppc64le";
237  default:
238  return Triple.getArchName();
239  }
240 }
241 
242 std::string ToolChain::getInputFilename(const InputInfo &Input) const {
243  return Input.getFilename();
244 }
245 
246 bool ToolChain::IsUnwindTablesDefault(const ArgList &Args) const {
247  return false;
248 }
249 
250 Tool *ToolChain::getClang() const {
251  if (!Clang)
252  Clang.reset(new tools::Clang(*this));
253  return Clang.get();
254 }
255 
257  return new tools::ClangAs(*this);
258 }
259 
261  llvm_unreachable("Linking is not supported by this toolchain");
262 }
263 
264 Tool *ToolChain::getAssemble() const {
265  if (!Assemble)
266  Assemble.reset(buildAssembler());
267  return Assemble.get();
268 }
269 
270 Tool *ToolChain::getClangAs() const {
271  if (!Assemble)
272  Assemble.reset(new tools::ClangAs(*this));
273  return Assemble.get();
274 }
275 
276 Tool *ToolChain::getLink() const {
277  if (!Link)
278  Link.reset(buildLinker());
279  return Link.get();
280 }
281 
282 Tool *ToolChain::getOffloadBundler() const {
283  if (!OffloadBundler)
284  OffloadBundler.reset(new tools::OffloadBundler(*this));
285  return OffloadBundler.get();
286 }
287 
289  switch (AC) {
291  return getAssemble();
292 
294  return getLink();
295 
296  case Action::InputClass:
302  llvm_unreachable("Invalid tool kind.");
303 
311  return getClang();
312 
315  return getOffloadBundler();
316  }
317 
318  llvm_unreachable("Invalid tool kind.");
319 }
320 
321 static StringRef getArchNameForCompilerRTLib(const ToolChain &TC,
322  const ArgList &Args) {
323  const llvm::Triple &Triple = TC.getTriple();
324  bool IsWindows = Triple.isOSWindows();
325 
326  if (TC.getArch() == llvm::Triple::arm || TC.getArch() == llvm::Triple::armeb)
327  return (arm::getARMFloatABI(TC, Args) == arm::FloatABI::Hard && !IsWindows)
328  ? "armhf"
329  : "arm";
330 
331  // For historic reasons, Android library is using i686 instead of i386.
332  if (TC.getArch() == llvm::Triple::x86 && Triple.isAndroid())
333  return "i686";
334 
335  return llvm::Triple::getArchTypeName(TC.getArch());
336 }
337 
338 StringRef ToolChain::getOSLibName() const {
339  switch (Triple.getOS()) {
340  case llvm::Triple::FreeBSD:
341  return "freebsd";
342  case llvm::Triple::NetBSD:
343  return "netbsd";
344  case llvm::Triple::OpenBSD:
345  return "openbsd";
346  case llvm::Triple::Solaris:
347  return "sunos";
348  default:
349  return getOS();
350  }
351 }
352 
353 std::string ToolChain::getCompilerRTPath() const {
354  SmallString<128> Path(getDriver().ResourceDir);
355  if (Triple.isOSUnknown()) {
356  llvm::sys::path::append(Path, "lib");
357  } else {
358  llvm::sys::path::append(Path, "lib", getOSLibName());
359  }
360  return Path.str();
361 }
362 
363 std::string ToolChain::getCompilerRT(const ArgList &Args, StringRef Component,
364  bool Shared) const {
365  const llvm::Triple &TT = getTriple();
366  const char *Env = TT.isAndroid() ? "-android" : "";
367  bool IsITANMSVCWindows =
368  TT.isWindowsMSVCEnvironment() || TT.isWindowsItaniumEnvironment();
369 
370  StringRef Arch = getArchNameForCompilerRTLib(*this, Args);
371  const char *Prefix = IsITANMSVCWindows ? "" : "lib";
372  const char *Suffix = Shared ? (Triple.isOSWindows() ? ".dll" : ".so")
373  : (IsITANMSVCWindows ? ".lib" : ".a");
374 
376  llvm::sys::path::append(Path, Prefix + Twine("clang_rt.") + Component + "-" +
377  Arch + Env + Suffix);
378  return Path.str();
379 }
380 
381 const char *ToolChain::getCompilerRTArgString(const llvm::opt::ArgList &Args,
382  StringRef Component,
383  bool Shared) const {
384  return Args.MakeArgString(getCompilerRT(Args, Component, Shared));
385 }
386 
388  SmallString<128> Path(getDriver().ResourceDir);
389  llvm::sys::path::append(Path, "lib", getOSLibName(),
390  llvm::Triple::getArchTypeName(getArch()));
391  return Path.str();
392 }
393 
394 bool ToolChain::needsProfileRT(const ArgList &Args) {
395  if (Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
396  false) ||
397  Args.hasArg(options::OPT_fprofile_generate) ||
398  Args.hasArg(options::OPT_fprofile_generate_EQ) ||
399  Args.hasArg(options::OPT_fprofile_instr_generate) ||
400  Args.hasArg(options::OPT_fprofile_instr_generate_EQ) ||
401  Args.hasArg(options::OPT_fcreate_profile) ||
402  Args.hasArg(options::OPT_coverage))
403  return true;
404 
405  return false;
406 }
407 
409  if (getDriver().ShouldUseClangCompiler(JA)) return getClang();
410  Action::ActionClass AC = JA.getKind();
412  return getClangAs();
413  return getTool(AC);
414 }
415 
416 std::string ToolChain::GetFilePath(const char *Name) const {
417  return D.GetFilePath(Name, *this);
418 }
419 
420 std::string ToolChain::GetProgramPath(const char *Name) const {
421  return D.GetProgramPath(Name, *this);
422 }
423 
424 std::string ToolChain::GetLinkerPath() const {
425  const Arg* A = Args.getLastArg(options::OPT_fuse_ld_EQ);
426  StringRef UseLinker = A ? A->getValue() : CLANG_DEFAULT_LINKER;
427 
428  if (llvm::sys::path::is_absolute(UseLinker)) {
429  // If we're passed what looks like an absolute path, don't attempt to
430  // second-guess that.
431  if (llvm::sys::fs::can_execute(UseLinker))
432  return UseLinker;
433  } else if (UseLinker.empty() || UseLinker == "ld") {
434  // If we're passed -fuse-ld= with no argument, or with the argument ld,
435  // then use whatever the default system linker is.
437  } else {
438  llvm::SmallString<8> LinkerName;
439  if (Triple.isOSDarwin())
440  LinkerName.append("ld64.");
441  else
442  LinkerName.append("ld.");
443  LinkerName.append(UseLinker);
444 
445  std::string LinkerPath(GetProgramPath(LinkerName.c_str()));
446  if (llvm::sys::fs::can_execute(LinkerPath))
447  return LinkerPath;
448  }
449 
450  if (A)
451  getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args);
452 
454 }
455 
457  return types::lookupTypeForExtension(Ext);
458 }
459 
461  return false;
462 }
463 
465  llvm::Triple HostTriple(LLVM_HOST_TRIPLE);
466  switch (HostTriple.getArch()) {
467  // The A32/T32/T16 instruction sets are not separate architectures in this
468  // context.
469  case llvm::Triple::arm:
470  case llvm::Triple::armeb:
471  case llvm::Triple::thumb:
472  case llvm::Triple::thumbeb:
473  return getArch() != llvm::Triple::arm && getArch() != llvm::Triple::thumb &&
474  getArch() != llvm::Triple::armeb && getArch() != llvm::Triple::thumbeb;
475  default:
476  return HostTriple.getArch() != getArch();
477  }
478 }
479 
481  return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC,
482  VersionTuple());
483 }
484 
485 llvm::ExceptionHandling
486 ToolChain::GetExceptionModel(const llvm::opt::ArgList &Args) const {
487  if (Triple.isOSWindows() && Triple.getArch() != llvm::Triple::x86)
488  return llvm::ExceptionHandling::WinEH;
490 }
491 
492 bool ToolChain::isThreadModelSupported(const StringRef Model) const {
493  if (Model == "single") {
494  // FIXME: 'single' is only supported on ARM and WebAssembly so far.
495  return Triple.getArch() == llvm::Triple::arm ||
496  Triple.getArch() == llvm::Triple::armeb ||
497  Triple.getArch() == llvm::Triple::thumb ||
498  Triple.getArch() == llvm::Triple::thumbeb ||
499  Triple.getArch() == llvm::Triple::wasm32 ||
500  Triple.getArch() == llvm::Triple::wasm64;
501  } else if (Model == "posix")
502  return true;
503 
504  return false;
505 }
506 
507 std::string ToolChain::ComputeLLVMTriple(const ArgList &Args,
508  types::ID InputType) const {
509  switch (getTriple().getArch()) {
510  default:
511  return getTripleString();
512 
513  case llvm::Triple::x86_64: {
514  llvm::Triple Triple = getTriple();
515  if (!Triple.isOSBinFormatMachO())
516  return getTripleString();
517 
518  if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
519  // x86_64h goes in the triple. Other -march options just use the
520  // vanilla triple we already have.
521  StringRef MArch = A->getValue();
522  if (MArch == "x86_64h")
523  Triple.setArchName(MArch);
524  }
525  return Triple.getTriple();
526  }
527  case llvm::Triple::aarch64: {
528  llvm::Triple Triple = getTriple();
529  if (!Triple.isOSBinFormatMachO())
530  return getTripleString();
531 
532  // FIXME: older versions of ld64 expect the "arm64" component in the actual
533  // triple string and query it to determine whether an LTO file can be
534  // handled. Remove this when we don't care any more.
535  Triple.setArchName("arm64");
536  return Triple.getTriple();
537  }
538  case llvm::Triple::arm:
539  case llvm::Triple::armeb:
540  case llvm::Triple::thumb:
541  case llvm::Triple::thumbeb: {
542  // FIXME: Factor into subclasses.
543  llvm::Triple Triple = getTriple();
544  bool IsBigEndian = getTriple().getArch() == llvm::Triple::armeb ||
545  getTriple().getArch() == llvm::Triple::thumbeb;
546 
547  // Handle pseudo-target flags '-mlittle-endian'/'-EL' and
548  // '-mbig-endian'/'-EB'.
549  if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
550  options::OPT_mbig_endian)) {
551  IsBigEndian = !A->getOption().matches(options::OPT_mlittle_endian);
552  }
553 
554  // Thumb2 is the default for V7 on Darwin.
555  //
556  // FIXME: Thumb should just be another -target-feaure, not in the triple.
557  StringRef MCPU, MArch;
558  if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
559  MCPU = A->getValue();
560  if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
561  MArch = A->getValue();
562  std::string CPU =
563  Triple.isOSBinFormatMachO()
564  ? tools::arm::getARMCPUForMArch(MArch, Triple).str()
565  : tools::arm::getARMTargetCPU(MCPU, MArch, Triple);
566  StringRef Suffix =
567  tools::arm::getLLVMArchSuffixForARM(CPU, MArch, Triple);
568  bool IsMProfile = ARM::parseArchProfile(Suffix) == ARM::ProfileKind::M;
569  bool ThumbDefault = IsMProfile || (ARM::parseArchVersion(Suffix) == 7 &&
570  getTriple().isOSBinFormatMachO());
571  // FIXME: this is invalid for WindowsCE
572  if (getTriple().isOSWindows())
573  ThumbDefault = true;
574  std::string ArchName;
575  if (IsBigEndian)
576  ArchName = "armeb";
577  else
578  ArchName = "arm";
579 
580  // Check if ARM ISA was explicitly selected (using -mno-thumb or -marm) for
581  // M-Class CPUs/architecture variants, which is not supported.
582  bool ARMModeRequested = !Args.hasFlag(options::OPT_mthumb,
583  options::OPT_mno_thumb, ThumbDefault);
584  if (IsMProfile && ARMModeRequested) {
585  if (!MCPU.empty())
586  getDriver().Diag(diag::err_cpu_unsupported_isa) << CPU << "ARM";
587  else
588  getDriver().Diag(diag::err_arch_unsupported_isa)
589  << tools::arm::getARMArch(MArch, getTriple()) << "ARM";
590  }
591 
592  // Check to see if an explicit choice to use thumb has been made via
593  // -mthumb. For assembler files we must check for -mthumb in the options
594  // passed to the assember via -Wa or -Xassembler.
595  bool IsThumb = false;
596  if (InputType != types::TY_PP_Asm)
597  IsThumb = Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb,
598  ThumbDefault);
599  else {
600  // Ideally we would check for these flags in
601  // CollectArgsForIntegratedAssembler but we can't change the ArchName at
602  // that point. There is no assembler equivalent of -mno-thumb, -marm, or
603  // -mno-arm.
604  for (const auto *A :
605  Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) {
606  for (StringRef Value : A->getValues()) {
607  if (Value == "-mthumb")
608  IsThumb = true;
609  }
610  }
611  }
612  // Assembly files should start in ARM mode, unless arch is M-profile, or
613  // -mthumb has been passed explicitly to the assembler. Windows is always
614  // thumb.
615  if (IsThumb || IsMProfile || getTriple().isOSWindows()) {
616  if (IsBigEndian)
617  ArchName = "thumbeb";
618  else
619  ArchName = "thumb";
620  }
621  Triple.setArchName(ArchName + Suffix.str());
622 
623  return Triple.getTriple();
624  }
625  }
626 }
627 
628 std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args,
629  types::ID InputType) const {
630  return ComputeLLVMTriple(Args, InputType);
631 }
632 
633 void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
634  ArgStringList &CC1Args) const {
635  // Each toolchain should provide the appropriate include flags.
636 }
637 
639  const ArgList &DriverArgs, ArgStringList &CC1Args,
640  Action::OffloadKind DeviceOffloadKind) const {}
641 
642 void ToolChain::addClangWarningOptions(ArgStringList &CC1Args) const {}
643 
644 void ToolChain::addProfileRTLibs(const llvm::opt::ArgList &Args,
645  llvm::opt::ArgStringList &CmdArgs) const {
646  if (!needsProfileRT(Args)) return;
647 
648  CmdArgs.push_back(getCompilerRTArgString(Args, "profile"));
649 }
650 
652  const ArgList &Args) const {
653  const Arg* A = Args.getLastArg(options::OPT_rtlib_EQ);
654  StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_RTLIB;
655 
656  // Only use "platform" in tests to override CLANG_DEFAULT_RTLIB!
657  if (LibName == "compiler-rt")
659  else if (LibName == "libgcc")
660  return ToolChain::RLT_Libgcc;
661  else if (LibName == "platform")
662  return GetDefaultRuntimeLibType();
663 
664  if (A)
665  getDriver().Diag(diag::err_drv_invalid_rtlib_name) << A->getAsString(Args);
666 
667  return GetDefaultRuntimeLibType();
668 }
669 
671  const Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
672  StringRef LibName = A ? A->getValue() : CLANG_DEFAULT_CXX_STDLIB;
673 
674  // Only use "platform" in tests to override CLANG_DEFAULT_CXX_STDLIB!
675  if (LibName == "libc++")
676  return ToolChain::CST_Libcxx;
677  else if (LibName == "libstdc++")
679  else if (LibName == "platform")
680  return GetDefaultCXXStdlibType();
681 
682  if (A)
683  getDriver().Diag(diag::err_drv_invalid_stdlib_name) << A->getAsString(Args);
684 
685  return GetDefaultCXXStdlibType();
686 }
687 
688 /// \brief Utility function to add a system include directory to CC1 arguments.
689 /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
690  ArgStringList &CC1Args,
691  const Twine &Path) {
692  CC1Args.push_back("-internal-isystem");
693  CC1Args.push_back(DriverArgs.MakeArgString(Path));
694 }
695 
696 /// \brief Utility function to add a system include directory with extern "C"
697 /// semantics to CC1 arguments.
698 ///
699 /// Note that this should be used rarely, and only for directories that
700 /// historically and for legacy reasons are treated as having implicit extern
701 /// "C" semantics. These semantics are *ignored* by and large today, but its
702 /// important to preserve the preprocessor changes resulting from the
703 /// classification.
704 /*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs,
705  ArgStringList &CC1Args,
706  const Twine &Path) {
707  CC1Args.push_back("-internal-externc-isystem");
708  CC1Args.push_back(DriverArgs.MakeArgString(Path));
709 }
710 
711 void ToolChain::addExternCSystemIncludeIfExists(const ArgList &DriverArgs,
712  ArgStringList &CC1Args,
713  const Twine &Path) {
714  if (llvm::sys::fs::exists(Path))
715  addExternCSystemInclude(DriverArgs, CC1Args, Path);
716 }
717 
718 /// \brief Utility function to add a list of system include directories to CC1.
719 /*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs,
720  ArgStringList &CC1Args,
721  ArrayRef<StringRef> Paths) {
722  for (const auto Path : Paths) {
723  CC1Args.push_back("-internal-isystem");
724  CC1Args.push_back(DriverArgs.MakeArgString(Path));
725  }
726 }
727 
728 void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
729  ArgStringList &CC1Args) const {
730  // Header search paths should be handled by each of the subclasses.
731  // Historically, they have not been, and instead have been handled inside of
732  // the CC1-layer frontend. As the logic is hoisted out, this generic function
733  // will slowly stop being called.
734  //
735  // While it is being called, replicate a bit of a hack to propagate the
736  // '-stdlib=' flag down to CC1 so that it can in turn customize the C++
737  // header search paths with it. Once all systems are overriding this
738  // function, the CC1 flag and this line can be removed.
739  DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
740 }
741 
742 bool ToolChain::ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const {
743  return getDriver().CCCIsCXX() &&
744  !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
745  options::OPT_nostdlibxx);
746 }
747 
748 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
749  ArgStringList &CmdArgs) const {
750  assert(!Args.hasArg(options::OPT_nostdlibxx) &&
751  "should not have called this");
753 
754  switch (Type) {
756  CmdArgs.push_back("-lc++");
757  break;
758 
760  CmdArgs.push_back("-lstdc++");
761  break;
762  }
763 }
764 
765 void ToolChain::AddFilePathLibArgs(const ArgList &Args,
766  ArgStringList &CmdArgs) const {
767  for (const auto &LibPath : getFilePaths())
768  if(LibPath.length() > 0)
769  CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + LibPath));
770 }
771 
772 void ToolChain::AddCCKextLibArgs(const ArgList &Args,
773  ArgStringList &CmdArgs) const {
774  CmdArgs.push_back("-lcc_kext");
775 }
776 
778  ArgStringList &CmdArgs) const {
779  // Do not check for -fno-fast-math or -fno-unsafe-math when -Ofast passed
780  // (to keep the linker options consistent with gcc and clang itself).
781  if (!isOptimizationLevelFast(Args)) {
782  // Check if -ffast-math or -funsafe-math.
783  Arg *A =
784  Args.getLastArg(options::OPT_ffast_math, options::OPT_fno_fast_math,
785  options::OPT_funsafe_math_optimizations,
786  options::OPT_fno_unsafe_math_optimizations);
787 
788  if (!A || A->getOption().getID() == options::OPT_fno_fast_math ||
789  A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations)
790  return false;
791  }
792  // If crtfastmath.o exists add it to the arguments.
793  std::string Path = GetFilePath("crtfastmath.o");
794  if (Path == "crtfastmath.o") // Not found.
795  return false;
796 
797  CmdArgs.push_back(Args.MakeArgString(Path));
798  return true;
799 }
800 
802  // Return sanitizers which don't require runtime support and are not
803  // platform dependent.
804 
805  using namespace SanitizerKind;
806 
807  SanitizerMask Res = (Undefined & ~Vptr & ~Function) | (CFI & ~CFIICall) |
808  CFICastStrict | UnsignedIntegerOverflow | Nullability |
809  LocalBounds;
810  if (getTriple().getArch() == llvm::Triple::x86 ||
811  getTriple().getArch() == llvm::Triple::x86_64 ||
812  getTriple().getArch() == llvm::Triple::arm ||
813  getTriple().getArch() == llvm::Triple::aarch64 ||
814  getTriple().getArch() == llvm::Triple::wasm32 ||
815  getTriple().getArch() == llvm::Triple::wasm64)
816  Res |= CFIICall;
817  if (getTriple().getArch() == llvm::Triple::x86_64 ||
818  getTriple().getArch() == llvm::Triple::aarch64)
819  Res |= ShadowCallStack;
820  return Res;
821 }
822 
823 void ToolChain::AddCudaIncludeArgs(const ArgList &DriverArgs,
824  ArgStringList &CC1Args) const {}
825 
826 void ToolChain::AddIAMCUIncludeArgs(const ArgList &DriverArgs,
827  ArgStringList &CC1Args) const {}
828 
829 static VersionTuple separateMSVCFullVersion(unsigned Version) {
830  if (Version < 100)
831  return VersionTuple(Version);
832 
833  if (Version < 10000)
834  return VersionTuple(Version / 100, Version % 100);
835 
836  unsigned Build = 0, Factor = 1;
837  for (; Version > 10000; Version = Version / 10, Factor = Factor * 10)
838  Build = Build + (Version % 10) * Factor;
839  return VersionTuple(Version / 100, Version % 100, Build);
840 }
841 
844  const llvm::opt::ArgList &Args) const {
845  const Arg *MSCVersion = Args.getLastArg(options::OPT_fmsc_version);
846  const Arg *MSCompatibilityVersion =
847  Args.getLastArg(options::OPT_fms_compatibility_version);
848 
849  if (MSCVersion && MSCompatibilityVersion) {
850  if (D)
851  D->Diag(diag::err_drv_argument_not_allowed_with)
852  << MSCVersion->getAsString(Args)
853  << MSCompatibilityVersion->getAsString(Args);
854  return VersionTuple();
855  }
856 
857  if (MSCompatibilityVersion) {
858  VersionTuple MSVT;
859  if (MSVT.tryParse(MSCompatibilityVersion->getValue())) {
860  if (D)
861  D->Diag(diag::err_drv_invalid_value)
862  << MSCompatibilityVersion->getAsString(Args)
863  << MSCompatibilityVersion->getValue();
864  } else {
865  return MSVT;
866  }
867  }
868 
869  if (MSCVersion) {
870  unsigned Version = 0;
871  if (StringRef(MSCVersion->getValue()).getAsInteger(10, Version)) {
872  if (D)
873  D->Diag(diag::err_drv_invalid_value)
874  << MSCVersion->getAsString(Args) << MSCVersion->getValue();
875  } else {
876  return separateMSVCFullVersion(Version);
877  }
878  }
879 
880  return VersionTuple();
881 }
882 
883 llvm::opt::DerivedArgList *ToolChain::TranslateOpenMPTargetArgs(
884  const llvm::opt::DerivedArgList &Args, bool SameTripleAsHost,
885  SmallVectorImpl<llvm::opt::Arg *> &AllocatedArgs) const {
886  DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
887  const OptTable &Opts = getDriver().getOpts();
888  bool Modified = false;
889 
890  // Handle -Xopenmp-target flags
891  for (auto *A : Args) {
892  // Exclude flags which may only apply to the host toolchain.
893  // Do not exclude flags when the host triple (AuxTriple)
894  // matches the current toolchain triple. If it is not present
895  // at all, target and host share a toolchain.
896  if (A->getOption().matches(options::OPT_m_Group)) {
897  if (SameTripleAsHost)
898  DAL->append(A);
899  else
900  Modified = true;
901  continue;
902  }
903 
904  unsigned Index;
905  unsigned Prev;
906  bool XOpenMPTargetNoTriple =
907  A->getOption().matches(options::OPT_Xopenmp_target);
908 
909  if (A->getOption().matches(options::OPT_Xopenmp_target_EQ)) {
910  // Passing device args: -Xopenmp-target=<triple> -opt=val.
911  if (A->getValue(0) == getTripleString())
912  Index = Args.getBaseArgs().MakeIndex(A->getValue(1));
913  else
914  continue;
915  } else if (XOpenMPTargetNoTriple) {
916  // Passing device args: -Xopenmp-target -opt=val.
917  Index = Args.getBaseArgs().MakeIndex(A->getValue(0));
918  } else {
919  DAL->append(A);
920  continue;
921  }
922 
923  // Parse the argument to -Xopenmp-target.
924  Prev = Index;
925  std::unique_ptr<Arg> XOpenMPTargetArg(Opts.ParseOneArg(Args, Index));
926  if (!XOpenMPTargetArg || Index > Prev + 1) {
927  getDriver().Diag(diag::err_drv_invalid_Xopenmp_target_with_args)
928  << A->getAsString(Args);
929  continue;
930  }
931  if (XOpenMPTargetNoTriple && XOpenMPTargetArg &&
932  Args.getAllArgValues(options::OPT_fopenmp_targets_EQ).size() != 1) {
933  getDriver().Diag(diag::err_drv_Xopenmp_target_missing_triple);
934  continue;
935  }
936  XOpenMPTargetArg->setBaseArg(A);
937  A = XOpenMPTargetArg.release();
938  AllocatedArgs.push_back(A);
939  DAL->append(A);
940  Modified = true;
941  }
942 
943  if (Modified)
944  return DAL;
945 
946  delete DAL;
947  return nullptr;
948 }
virtual void addClangWarningOptions(llvm::opt::ArgStringList &CC1Args) const
Add warning options that need to be passed to cc1 for this target.
Definition: ToolChain.cpp:642
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:704
void setTripleEnvironment(llvm::Triple::EnvironmentType Env)
Definition: ToolChain.cpp:95
virtual std::string ComputeLLVMTriple(const llvm::opt::ArgList &Args, types::ID InputType=types::TY_INVALID) const
ComputeLLVMTriple - Return the LLVM target triple to use, after taking command line arguments into ac...
Definition: ToolChain.cpp:507
static void addExternCSystemIncludeIfExists(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Definition: ToolChain.cpp:711
Represents a version number in the form major[.minor[.subminor[.build]]].
Definition: VersionTuple.h:26
virtual void AddCCKextLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddCCKextLibArgs - Add the system specific linker arguments to use for kernel extensions (Darwin-spec...
Definition: ToolChain.cpp:772
virtual const char * getDefaultLinker() const
GetDefaultLinker - Get the default linker to use.
Definition: ToolChain.h:342
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:30
virtual ObjCRuntime getDefaultObjCRuntime(bool isNonFragile) const
getDefaultObjCRuntime - Return the default Objective-C runtime for this platform. ...
Definition: ToolChain.cpp:480
const char * getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:381
Defines types useful for describing an Objective-C runtime.
The base class of the type hierarchy.
Definition: Type.h:1419
const XRayArgs & getXRayArgs() const
Definition: ToolChain.cpp:121
virtual void AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
AddClangCXXStdlibIncludeArgs - Add the clang -cc1 level arguments to set the include paths to use for...
Definition: ToolChain.cpp:728
StringRef getOS() const
Definition: ToolChain.h:198
virtual bool isThreadModelSupported(const StringRef Model) const
isThreadModelSupported() - Does this target support a thread model?
Definition: ToolChain.cpp:492
virtual bool IsUnwindTablesDefault(const llvm::opt::ArgList &Args) const
IsUnwindTablesDefault - Does this tool chain use -funwind-tables by default.
Definition: ToolChain.cpp:246
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:110
&#39;gcc&#39; is the Objective-C runtime shipped with GCC, implementing a fragile Objective-C ABI ...
Definition: ObjCRuntime.h:53
static ParsedClangName getTargetAndModeFromProgramName(StringRef ProgName)
Return any implicit target and/or mode flag for an invocation of the compiler driver as ProgName...
Definition: ToolChain.cpp:203
static VersionTuple separateMSVCFullVersion(unsigned Version)
Definition: ToolChain.cpp:829
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:644
std::string GetLinkerPath() const
Returns the linker path, respecting the -fuse-ld= argument to determine the linker suffix or name...
Definition: ToolChain.cpp:424
FloatABI getARMFloatABI(const ToolChain &TC, const llvm::opt::ArgList &Args)
Clang integrated assembler tool.
Definition: Clang.h:115
Defines the clang::SanitizerKind enum.
const std::string getARMArch(llvm::StringRef Arch, const llvm::Triple &Triple)
The virtual file system interface.
const char * getFilename() const
Definition: InputInfo.h:84
virtual void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
Add the clang cc1 arguments for system include paths.
Definition: ToolChain.cpp:633
static StringRef getArchNameForCompilerRTLib(const ToolChain &TC, const ArgList &Args)
Definition: ToolChain.cpp:321
StringRef getOSLibName() const
Definition: ToolChain.cpp:338
static bool needsProfileRT(const llvm::opt::ArgList &Args)
needsProfileRT - returns true if instrumentation profile is on.
Definition: ToolChain.cpp:394
std::string getTripleString() const
Definition: ToolChain.h:204
StringRef getARMCPUForMArch(llvm::StringRef Arch, const llvm::Triple &Triple)
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:23
std::string GetFilePath(const char *Name) const
Definition: ToolChain.cpp:416
vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:103
bool isOptimizationLevelFast(const llvm::opt::ArgList &Args)
path_list & getFilePaths()
Definition: ToolChain.h:214
virtual bool AddFastMathRuntimeIfAvailable(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddFastMathRuntimeIfAvailable - If a runtime library exists that sets global flags for unsafe floatin...
Definition: ToolChain.cpp:777
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:59
ToolChain(const Driver &D, const llvm::Triple &T, const llvm::opt::ArgList &Args)
Definition: ToolChain.cpp:86
virtual bool IsIntegratedAssemblerDefault() const
IsIntegratedAssemblerDefault - Does this tool chain enable -integrated-as by default.
Definition: ToolChain.h:312
virtual bool useRelaxRelocations() const
Check whether to enable x86 relax relocations by default.
Definition: ToolChain.cpp:111
virtual bool useIntegratedAs() const
Check if the toolchain should use the integrated assembler.
Definition: ToolChain.cpp:105
ActionClass getKind() const
Definition: Action.h:138
virtual VersionTuple computeMSVCVersion(const Driver *D, const llvm::opt::ArgList &Args) const
On Windows, returns the MSVC compatibility version.
Definition: ToolChain.cpp:843
static void addSystemIncludes(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, ArrayRef< StringRef > Paths)
Utility function to add a list of system include directories to CC1.
Definition: ToolChain.cpp:719
virtual llvm::ExceptionHandling GetExceptionModel(const llvm::opt::ArgList &Args) const
GetExceptionModel - Return the tool chain exception model.
Definition: ToolChain.cpp:486
const FunctionProtoType * T
static llvm::opt::Arg * GetRTTIArgument(const ArgList &Args)
Definition: ToolChain.cpp:53
virtual Tool * buildLinker() const
Definition: ToolChain.cpp:260
static const DriverSuffix * parseDriverSuffix(StringRef ProgName, size_t &Pos)
Definition: ToolChain.cpp:176
virtual llvm::opt::DerivedArgList * TranslateOpenMPTargetArgs(const llvm::opt::DerivedArgList &Args, bool SameTripleAsHost, SmallVectorImpl< llvm::opt::Arg *> &AllocatedArgs) const
TranslateOpenMPTargetArgs - Create a new derived argument list for that contains the OpenMP target sp...
Definition: ToolChain.cpp:883
virtual types::ID LookupTypeForExtension(StringRef Ext) const
LookupTypeForExtension - Return the default language type to use for the given extension.
Definition: ToolChain.cpp:456
static const DriverSuffix * FindDriverSuffix(StringRef ProgName, size_t &Pos)
Definition: ToolChain.cpp:136
virtual std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:363
&#39;gnustep&#39; is the modern non-fragile GNUstep runtime.
Definition: ObjCRuntime.h:56
virtual CXXStdlibType GetDefaultCXXStdlibType() const
Definition: ToolChain.h:349
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:195
virtual void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
Add arguments to use system-specific CUDA includes.
Definition: ToolChain.cpp:823
virtual std::string getInputFilename(const InputInfo &Input) const
Some toolchains need to modify the file name, for example to replace the extension for object files w...
Definition: ToolChain.cpp:242
void AddFilePathLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddFilePathLibArgs - Add each thing in getFilePaths() as a "-L" option.
Definition: ToolChain.cpp:765
vfs::FileSystem & getVFS() const
Definition: Driver.h:301
Offload bundler tool.
Definition: Clang.h:134
const Driver & getDriver() const
Definition: ToolChain.h:179
bool CCCIsCXX() const
Whether the driver should follow g++ like behavior.
Definition: Driver.h:174
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:689
virtual bool HasNativeLLVMSupport() const
HasNativeLTOLinker - Check whether the linker and related tools have native LLVM support.
Definition: ToolChain.cpp:460
constexpr XRayInstrMask None
Definition: XRayInstr.h:38
virtual RuntimeLibType GetRuntimeLibType(const llvm::opt::ArgList &Args) const
Definition: ToolChain.cpp:651
virtual Tool * buildAssembler() const
Definition: ToolChain.cpp:256
Helper structure used to pass information extracted from clang executable name such as i686-linux-and...
Definition: ToolChain.h:61
std::string getARMTargetCPU(StringRef CPU, llvm::StringRef Arch, const llvm::Triple &Triple)
bool ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const
Returns if the C++ standard library should be linked in.
Definition: ToolChain.cpp:742
Dataflow Directional Tag Classes.
bool tryParse(StringRef string)
Try to parse the given string as a version number.
virtual std::string ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args, types::ID InputType=types::TY_INVALID) const
ComputeEffectiveClangTriple - Return the Clang triple to use for this target, which may take into acc...
Definition: ToolChain.cpp:628
Clang compiler tool.
Definition: Clang.h:29
static ToolChain::RTTIMode CalculateRTTIMode(const ArgList &Args, const llvm::Triple &Triple, const Arg *CachedRTTIArg)
Definition: ToolChain.cpp:58
The basic abstraction for the target Objective-C runtime.
Definition: ObjCRuntime.h:28
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:115
static std::string normalizeProgramName(llvm::StringRef Argv0)
Normalize the program name from argv[0] by stripping the file extension if present and lower-casing t...
Definition: ToolChain.cpp:167
uint64_t SanitizerMask
Definition: Sanitizers.h:26
StringRef getDefaultUniversalArchName() const
Provide the default architecture name (as expected by -arch) for this toolchain.
Definition: ToolChain.cpp:225
const llvm::Triple & getTriple() const
Definition: ToolChain.h:181
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:801
ID lookupTypeForExtension(llvm::StringRef Ext)
lookupTypeForExtension - Lookup the type to use for the file extension Ext.
Definition: Types.cpp:186
std::string getArchSpecificLibPath() const
Definition: ToolChain.cpp:387
virtual Tool * getTool(Action::ActionClass AC) const
Definition: ToolChain.cpp:288
virtual std::string getCompilerRTPath() const
Definition: ToolChain.cpp:353
std::string GetProgramPath(const char *Name) const
Definition: ToolChain.cpp:420
const llvm::opt::OptTable & getOpts() const
Definition: Driver.h:297
virtual bool isCrossCompiling() const
Returns true if the toolchain is targeting a non-native architecture.
Definition: ToolChain.cpp:464
virtual CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const
Definition: ToolChain.cpp:670
virtual Tool * SelectTool(const JobAction &JA) const
Choose a tool to use to handle the action JA.
Definition: ToolChain.cpp:408
virtual void AddIAMCUIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const
Add arguments to use MCU GCC toolchain includes.
Definition: ToolChain.cpp:826
Defines the clang::VersionTuple class, which represents a version in the form major[.minor[.subminor]].
StringRef getLLVMArchSuffixForARM(llvm::StringRef CPU, llvm::StringRef Arch, const llvm::Triple &Triple)
virtual void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, Action::OffloadKind DeviceOffloadKind) const
Add options that need to be passed to cc1 for this target.
Definition: ToolChain.cpp:638
virtual RuntimeLibType GetDefaultRuntimeLibType() const
GetDefaultRuntimeLibType - Get the default runtime library variant to use.
Definition: ToolChain.h:345
virtual void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddCXXStdlibLibArgs - Add the system specific linker arguments to use for the given C++ standard libr...
Definition: ToolChain.cpp:748
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:84