1//===--- ToolChains.h - ToolChain Implementations ---------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef CLANG_LIB_DRIVER_TOOLCHAINS_H_
11#define CLANG_LIB_DRIVER_TOOLCHAINS_H_
12
13#include "Tools.h"
14#include "clang/Basic/VersionTuple.h"
15#include "clang/Driver/Action.h"
16#include "clang/Driver/Multilib.h"
17#include "clang/Driver/ToolChain.h"
18#include "llvm/ADT/DenseMap.h"
19#include "llvm/ADT/Optional.h"
20#include "llvm/Support/Compiler.h"
21#include <set>
22#include <vector>
23
24namespace clang {
25namespace driver {
26namespace toolchains {
27
28/// Generic_GCC - A tool chain using the 'gcc' command to perform
29/// all subcommands; this relies on gcc translating the majority of
30/// command line options.
31class LLVM_LIBRARY_VISIBILITY Generic_GCC : public ToolChain {
32protected:
33  /// \brief Struct to store and manipulate GCC versions.
34  ///
35  /// We rely on assumptions about the form and structure of GCC version
36  /// numbers: they consist of at most three '.'-separated components, and each
37  /// component is a non-negative integer except for the last component. For
38  /// the last component we are very flexible in order to tolerate release
39  /// candidates or 'x' wildcards.
40  ///
41  /// Note that the ordering established among GCCVersions is based on the
42  /// preferred version string to use. For example we prefer versions without
43  /// a hard-coded patch number to those with a hard coded patch number.
44  ///
45  /// Currently this doesn't provide any logic for textual suffixes to patches
46  /// in the way that (for example) Debian's version format does. If that ever
47  /// becomes necessary, it can be added.
48  struct GCCVersion {
49    /// \brief The unparsed text of the version.
50    std::string Text;
51
52    /// \brief The parsed major, minor, and patch numbers.
53    int Major, Minor, Patch;
54
55    /// \brief The text of the parsed major, and major+minor versions.
56    std::string MajorStr, MinorStr;
57
58    /// \brief Any textual suffix on the patch number.
59    std::string PatchSuffix;
60
61    static GCCVersion Parse(StringRef VersionText);
62    bool isOlderThan(int RHSMajor, int RHSMinor, int RHSPatch,
63                     StringRef RHSPatchSuffix = StringRef()) const;
64    bool operator<(const GCCVersion &RHS) const {
65      return isOlderThan(RHS.Major, RHS.Minor, RHS.Patch, RHS.PatchSuffix);
66    }
67    bool operator>(const GCCVersion &RHS) const { return RHS < *this; }
68    bool operator<=(const GCCVersion &RHS) const { return !(*this > RHS); }
69    bool operator>=(const GCCVersion &RHS) const { return !(*this < RHS); }
70  };
71
72  /// \brief This is a class to find a viable GCC installation for Clang to
73  /// use.
74  ///
75  /// This class tries to find a GCC installation on the system, and report
76  /// information about it. It starts from the host information provided to the
77  /// Driver, and has logic for fuzzing that where appropriate.
78  class GCCInstallationDetector {
79    bool IsValid;
80    llvm::Triple GCCTriple;
81
82    // FIXME: These might be better as path objects.
83    std::string GCCInstallPath;
84    std::string GCCParentLibPath;
85
86    /// The primary multilib appropriate for the given flags.
87    Multilib SelectedMultilib;
88    /// On Biarch systems, this corresponds to the default multilib when
89    /// targeting the non-default multilib. Otherwise, it is empty.
90    llvm::Optional<Multilib> BiarchSibling;
91
92    GCCVersion Version;
93
94    // We retain the list of install paths that were considered and rejected in
95    // order to print out detailed information in verbose mode.
96    std::set<std::string> CandidateGCCInstallPaths;
97
98    /// The set of multilibs that the detected installation supports.
99    MultilibSet Multilibs;
100
101  public:
102    GCCInstallationDetector() : IsValid(false) {}
103    void init(const Driver &D, const llvm::Triple &TargetTriple,
104                            const llvm::opt::ArgList &Args);
105
106    /// \brief Check whether we detected a valid GCC install.
107    bool isValid() const { return IsValid; }
108
109    /// \brief Get the GCC triple for the detected install.
110    const llvm::Triple &getTriple() const { return GCCTriple; }
111
112    /// \brief Get the detected GCC installation path.
113    StringRef getInstallPath() const { return GCCInstallPath; }
114
115    /// \brief Get the detected GCC parent lib path.
116    StringRef getParentLibPath() const { return GCCParentLibPath; }
117
118    /// \brief Get the detected Multilib
119    const Multilib &getMultilib() const { return SelectedMultilib; }
120
121    /// \brief Get the whole MultilibSet
122    const MultilibSet &getMultilibs() const { return Multilibs; }
123
124    /// Get the biarch sibling multilib (if it exists).
125    /// \return true iff such a sibling exists
126    bool getBiarchSibling(Multilib &M) const;
127
128    /// \brief Get the detected GCC version string.
129    const GCCVersion &getVersion() const { return Version; }
130
131    /// \brief Print information about the detected GCC installation.
132    void print(raw_ostream &OS) const;
133
134  private:
135    static void
136    CollectLibDirsAndTriples(const llvm::Triple &TargetTriple,
137                             const llvm::Triple &BiarchTriple,
138                             SmallVectorImpl<StringRef> &LibDirs,
139                             SmallVectorImpl<StringRef> &TripleAliases,
140                             SmallVectorImpl<StringRef> &BiarchLibDirs,
141                             SmallVectorImpl<StringRef> &BiarchTripleAliases);
142
143    void ScanLibDirForGCCTriple(const llvm::Triple &TargetArch,
144                                const llvm::opt::ArgList &Args,
145                                const std::string &LibDir,
146                                StringRef CandidateTriple,
147                                bool NeedsBiarchSuffix = false);
148  };
149
150  GCCInstallationDetector GCCInstallation;
151
152public:
153  Generic_GCC(const Driver &D, const llvm::Triple &Triple,
154              const llvm::opt::ArgList &Args);
155  ~Generic_GCC();
156
157  void printVerboseInfo(raw_ostream &OS) const override;
158
159  bool IsUnwindTablesDefault() const override;
160  bool isPICDefault() const override;
161  bool isPIEDefault() const override;
162  bool isPICDefaultForced() const override;
163  bool IsIntegratedAssemblerDefault() const override;
164
165protected:
166  Tool *getTool(Action::ActionClass AC) const override;
167  Tool *buildAssembler() const override;
168  Tool *buildLinker() const override;
169
170  /// \name ToolChain Implementation Helper Functions
171  /// @{
172
173  /// \brief Check whether the target triple's architecture is 64-bits.
174  bool isTarget64Bit() const { return getTriple().isArch64Bit(); }
175
176  /// \brief Check whether the target triple's architecture is 32-bits.
177  bool isTarget32Bit() const { return getTriple().isArch32Bit(); }
178
179  /// @}
180
181private:
182  mutable std::unique_ptr<tools::gcc::Preprocess> Preprocess;
183  mutable std::unique_ptr<tools::gcc::Compile> Compile;
184};
185
186class LLVM_LIBRARY_VISIBILITY MachO : public ToolChain {
187protected:
188  Tool *buildAssembler() const override;
189  Tool *buildLinker() const override;
190  Tool *getTool(Action::ActionClass AC) const override;
191private:
192  mutable std::unique_ptr<tools::darwin::Lipo> Lipo;
193  mutable std::unique_ptr<tools::darwin::Dsymutil> Dsymutil;
194  mutable std::unique_ptr<tools::darwin::VerifyDebug> VerifyDebug;
195
196public:
197  MachO(const Driver &D, const llvm::Triple &Triple,
198             const llvm::opt::ArgList &Args);
199  ~MachO();
200
201  /// @name MachO specific toolchain API
202  /// {
203
204  /// Get the "MachO" arch name for a particular compiler invocation. For
205  /// example, Apple treats different ARM variations as distinct architectures.
206  StringRef getMachOArchName(const llvm::opt::ArgList &Args) const;
207
208
209  /// Add the linker arguments to link the ARC runtime library.
210  virtual void AddLinkARCArgs(const llvm::opt::ArgList &Args,
211                              llvm::opt::ArgStringList &CmdArgs) const {}
212
213  /// Add the linker arguments to link the compiler runtime library.
214  virtual void AddLinkRuntimeLibArgs(const llvm::opt::ArgList &Args,
215                                     llvm::opt::ArgStringList &CmdArgs) const;
216
217  virtual void
218  addStartObjectFileArgs(const llvm::opt::ArgList &Args,
219                         llvm::opt::ArgStringList &CmdArgs) const {}
220
221  virtual void addMinVersionArgs(const llvm::opt::ArgList &Args,
222                                 llvm::opt::ArgStringList &CmdArgs) const {}
223
224  /// On some iOS platforms, kernel and kernel modules were built statically. Is
225  /// this such a target?
226  virtual bool isKernelStatic() const {
227    return false;
228  }
229
230  /// Is the target either iOS or an iOS simulator?
231  bool isTargetIOSBased() const {
232    return false;
233  }
234
235  void AddLinkRuntimeLib(const llvm::opt::ArgList &Args,
236                         llvm::opt::ArgStringList &CmdArgs,
237                         StringRef DarwinStaticLib,
238                         bool AlwaysLink = false,
239                         bool IsEmbedded = false) const;
240
241  /// }
242  /// @name ToolChain Implementation
243  /// {
244
245  std::string ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args,
246                                          types::ID InputType) const override;
247
248  types::ID LookupTypeForExtension(const char *Ext) const override;
249
250  bool HasNativeLLVMSupport() const override;
251
252  llvm::opt::DerivedArgList *
253  TranslateArgs(const llvm::opt::DerivedArgList &Args,
254                const char *BoundArch) const override;
255
256  bool IsBlocksDefault() const override {
257    // Always allow blocks on Apple; users interested in versioning are
258    // expected to use /usr/include/Blocks.h.
259    return true;
260  }
261  bool IsIntegratedAssemblerDefault() const override {
262    // Default integrated assembler to on for Apple's MachO targets.
263    return true;
264  }
265
266  bool IsMathErrnoDefault() const override {
267    return false;
268  }
269
270  bool IsEncodeExtendedBlockSignatureDefault() const override {
271    return true;
272  }
273
274  bool IsObjCNonFragileABIDefault() const override {
275    // Non-fragile ABI is default for everything but i386.
276    return getTriple().getArch() != llvm::Triple::x86;
277  }
278
279  bool UseObjCMixedDispatch() const override {
280    return true;
281  }
282
283  bool IsUnwindTablesDefault() const override;
284
285  RuntimeLibType GetDefaultRuntimeLibType() const override {
286    return ToolChain::RLT_CompilerRT;
287  }
288
289  bool isPICDefault() const override;
290  bool isPIEDefault() const override;
291  bool isPICDefaultForced() const override;
292
293  bool SupportsProfiling() const override;
294
295  bool SupportsObjCGC() const override {
296    return false;
297  }
298
299  bool UseDwarfDebugFlags() const override;
300
301  bool UseSjLjExceptions() const override {
302    return false;
303  }
304
305  /// }
306};
307
308  /// Darwin - The base Darwin tool chain.
309class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
310public:
311  /// The host version.
312  unsigned DarwinVersion[3];
313
314  /// Whether the information on the target has been initialized.
315  //
316  // FIXME: This should be eliminated. What we want to do is make this part of
317  // the "default target for arguments" selection process, once we get out of
318  // the argument translation business.
319  mutable bool TargetInitialized;
320
321  enum DarwinPlatformKind {
322    MacOS,
323    IPhoneOS,
324    IPhoneOSSimulator
325  };
326
327  mutable DarwinPlatformKind TargetPlatform;
328
329  /// The OS version we are targeting.
330  mutable VersionTuple TargetVersion;
331
332private:
333  /// The default macosx-version-min of this tool chain; empty until
334  /// initialized.
335  std::string MacosxVersionMin;
336
337  /// The default ios-version-min of this tool chain; empty until
338  /// initialized.
339  std::string iOSVersionMin;
340
341private:
342  void AddDeploymentTarget(llvm::opt::DerivedArgList &Args) const;
343
344public:
345  Darwin(const Driver &D, const llvm::Triple &Triple,
346         const llvm::opt::ArgList &Args);
347  ~Darwin();
348
349  std::string ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args,
350                                          types::ID InputType) const override;
351
352  /// @name Apple Specific Toolchain Implementation
353  /// {
354
355  void
356  addMinVersionArgs(const llvm::opt::ArgList &Args,
357                    llvm::opt::ArgStringList &CmdArgs) const override;
358
359  void
360  addStartObjectFileArgs(const llvm::opt::ArgList &Args,
361                         llvm::opt::ArgStringList &CmdArgs) const override;
362
363  bool isKernelStatic() const override {
364    return !isTargetIPhoneOS() || isIPhoneOSVersionLT(6, 0) ||
365           getTriple().getArch() == llvm::Triple::arm64;
366  }
367
368protected:
369  /// }
370  /// @name Darwin specific Toolchain functions
371  /// {
372
373  // FIXME: Eliminate these ...Target functions and derive separate tool chains
374  // for these targets and put version in constructor.
375  void setTarget(DarwinPlatformKind Platform, unsigned Major, unsigned Minor,
376                 unsigned Micro) const {
377    // FIXME: For now, allow reinitialization as long as values don't
378    // change. This will go away when we move away from argument translation.
379    if (TargetInitialized && TargetPlatform == Platform &&
380        TargetVersion == VersionTuple(Major, Minor, Micro))
381      return;
382
383    assert(!TargetInitialized && "Target already initialized!");
384    TargetInitialized = true;
385    TargetPlatform = Platform;
386    TargetVersion = VersionTuple(Major, Minor, Micro);
387  }
388
389  bool isTargetIPhoneOS() const {
390    assert(TargetInitialized && "Target not initialized!");
391    return TargetPlatform == IPhoneOS;
392  }
393
394  bool isTargetIOSSimulator() const {
395    assert(TargetInitialized && "Target not initialized!");
396    return TargetPlatform == IPhoneOSSimulator;
397  }
398
399  bool isTargetIOSBased() const {
400    assert(TargetInitialized && "Target not initialized!");
401    return isTargetIPhoneOS() || isTargetIOSSimulator();
402  }
403
404  bool isTargetMacOS() const {
405    return TargetPlatform == MacOS;
406  }
407
408  bool isTargetInitialized() const { return TargetInitialized; }
409
410  VersionTuple getTargetVersion() const {
411    assert(TargetInitialized && "Target not initialized!");
412    return TargetVersion;
413  }
414
415  bool isIPhoneOSVersionLT(unsigned V0, unsigned V1=0, unsigned V2=0) const {
416    assert(isTargetIOSBased() && "Unexpected call for non iOS target!");
417    return TargetVersion < VersionTuple(V0, V1, V2);
418  }
419
420  bool isMacosxVersionLT(unsigned V0, unsigned V1=0, unsigned V2=0) const {
421    assert(isTargetMacOS() && "Unexpected call for non OS X target!");
422    return TargetVersion < VersionTuple(V0, V1, V2);
423  }
424
425public:
426  /// }
427  /// @name ToolChain Implementation
428  /// {
429
430  llvm::opt::DerivedArgList *
431  TranslateArgs(const llvm::opt::DerivedArgList &Args,
432                const char *BoundArch) const override;
433
434  ObjCRuntime getDefaultObjCRuntime(bool isNonFragile) const override;
435  bool hasBlocksRuntime() const override;
436
437  bool UseObjCMixedDispatch() const override {
438    // This is only used with the non-fragile ABI and non-legacy dispatch.
439
440    // Mixed dispatch is used everywhere except OS X before 10.6.
441    return !(isTargetMacOS() && isMacosxVersionLT(10, 6));
442  }
443
444  unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
445    // Stack protectors default to on for user code on 10.5,
446    // and for everything in 10.6 and beyond
447    if (isTargetIOSBased())
448      return 1;
449    else if (isTargetMacOS() && !isMacosxVersionLT(10, 6))
450      return 1;
451    else if (isTargetMacOS() && !isMacosxVersionLT(10, 5) && !KernelOrKext)
452      return 1;
453
454    return 0;
455  }
456
457  bool SupportsObjCGC() const override;
458
459  void CheckObjCARC() const override;
460
461  bool UseSjLjExceptions() const override;
462};
463
464/// DarwinClang - The Darwin toolchain used by Clang.
465class LLVM_LIBRARY_VISIBILITY DarwinClang : public Darwin {
466public:
467  DarwinClang(const Driver &D, const llvm::Triple &Triple,
468              const llvm::opt::ArgList &Args);
469
470  /// @name Apple ToolChain Implementation
471  /// {
472
473  void
474  AddLinkRuntimeLibArgs(const llvm::opt::ArgList &Args,
475                        llvm::opt::ArgStringList &CmdArgs) const override;
476
477  void
478  AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
479                      llvm::opt::ArgStringList &CmdArgs) const override;
480
481  void
482  AddCCKextLibArgs(const llvm::opt::ArgList &Args,
483                   llvm::opt::ArgStringList &CmdArgs) const override;
484
485  virtual void addClangWarningOptions(llvm::opt::ArgStringList &CC1Args) const;
486
487  void
488  AddLinkARCArgs(const llvm::opt::ArgList &Args,
489                 llvm::opt::ArgStringList &CmdArgs) const override;
490  /// }
491};
492
493class LLVM_LIBRARY_VISIBILITY Generic_ELF : public Generic_GCC {
494  virtual void anchor();
495public:
496  Generic_ELF(const Driver &D, const llvm::Triple &Triple,
497              const llvm::opt::ArgList &Args)
498      : Generic_GCC(D, Triple, Args) {}
499
500  void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
501                             llvm::opt::ArgStringList &CC1Args) const override;
502};
503
504class LLVM_LIBRARY_VISIBILITY AuroraUX : public Generic_GCC {
505public:
506  AuroraUX(const Driver &D, const llvm::Triple &Triple,
507           const llvm::opt::ArgList &Args);
508
509protected:
510  Tool *buildAssembler() const override;
511  Tool *buildLinker() const override;
512};
513
514class LLVM_LIBRARY_VISIBILITY Solaris : public Generic_GCC {
515public:
516  Solaris(const Driver &D, const llvm::Triple &Triple,
517          const llvm::opt::ArgList &Args);
518
519  bool IsIntegratedAssemblerDefault() const override { return true; }
520protected:
521  Tool *buildAssembler() const override;
522  Tool *buildLinker() const override;
523
524};
525
526
527class LLVM_LIBRARY_VISIBILITY OpenBSD : public Generic_ELF {
528public:
529  OpenBSD(const Driver &D, const llvm::Triple &Triple,
530          const llvm::opt::ArgList &Args);
531
532  bool IsMathErrnoDefault() const override { return false; }
533  bool IsObjCNonFragileABIDefault() const override { return true; }
534  bool isPIEDefault() const override { return true; }
535
536  unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
537    return 2;
538  }
539
540  virtual bool IsIntegratedAssemblerDefault() const {
541    if (getTriple().getArch() == llvm::Triple::ppc)
542      return true;
543    return Generic_ELF::IsIntegratedAssemblerDefault();
544  }
545
546protected:
547  Tool *buildAssembler() const override;
548  Tool *buildLinker() const override;
549};
550
551class LLVM_LIBRARY_VISIBILITY Bitrig : public Generic_ELF {
552public:
553  Bitrig(const Driver &D, const llvm::Triple &Triple,
554         const llvm::opt::ArgList &Args);
555
556  bool IsMathErrnoDefault() const override { return false; }
557  bool IsObjCNonFragileABIDefault() const override { return true; }
558
559  CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
560  void
561  AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
562                              llvm::opt::ArgStringList &CC1Args) const override;
563  void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
564                           llvm::opt::ArgStringList &CmdArgs) const override;
565  unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
566     return 1;
567  }
568
569protected:
570  Tool *buildAssembler() const override;
571  Tool *buildLinker() const override;
572};
573
574class LLVM_LIBRARY_VISIBILITY FreeBSD : public Generic_ELF {
575public:
576  FreeBSD(const Driver &D, const llvm::Triple &Triple,
577          const llvm::opt::ArgList &Args);
578  bool HasNativeLLVMSupport() const override;
579
580  bool IsMathErrnoDefault() const override { return false; }
581  bool IsObjCNonFragileABIDefault() const override { return true; }
582
583  CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
584  void
585  AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
586                               llvm::opt::ArgStringList &CC1Args) const override;
587  bool IsIntegratedAssemblerDefault() const override {
588    if (getTriple().getArch() == llvm::Triple::ppc ||
589        getTriple().getArch() == llvm::Triple::ppc64)
590      return true;
591    return Generic_ELF::IsIntegratedAssemblerDefault();
592  }
593
594  bool UseSjLjExceptions() const override;
595  bool isPIEDefault() const override;
596protected:
597  Tool *buildAssembler() const override;
598  Tool *buildLinker() const override;
599};
600
601class LLVM_LIBRARY_VISIBILITY NetBSD : public Generic_ELF {
602public:
603  NetBSD(const Driver &D, const llvm::Triple &Triple,
604         const llvm::opt::ArgList &Args);
605
606  bool IsMathErrnoDefault() const override { return false; }
607  bool IsObjCNonFragileABIDefault() const override { return true; }
608
609  CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
610
611  void
612  AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
613                              llvm::opt::ArgStringList &CC1Args) const override;
614  bool IsUnwindTablesDefault() const override {
615    return true;
616  }
617  bool IsIntegratedAssemblerDefault() const override {
618    if (getTriple().getArch() == llvm::Triple::ppc)
619      return true;
620    return Generic_ELF::IsIntegratedAssemblerDefault();
621  }
622
623protected:
624  Tool *buildAssembler() const override;
625  Tool *buildLinker() const override;
626};
627
628class LLVM_LIBRARY_VISIBILITY Minix : public Generic_ELF {
629public:
630  Minix(const Driver &D, const llvm::Triple &Triple,
631        const llvm::opt::ArgList &Args);
632
633protected:
634  Tool *buildAssembler() const override;
635  Tool *buildLinker() const override;
636};
637
638class LLVM_LIBRARY_VISIBILITY DragonFly : public Generic_ELF {
639public:
640  DragonFly(const Driver &D, const llvm::Triple &Triple,
641            const llvm::opt::ArgList &Args);
642
643  bool IsMathErrnoDefault() const override { return false; }
644
645protected:
646  Tool *buildAssembler() const override;
647  Tool *buildLinker() const override;
648};
649
650class LLVM_LIBRARY_VISIBILITY Linux : public Generic_ELF {
651public:
652  Linux(const Driver &D, const llvm::Triple &Triple,
653        const llvm::opt::ArgList &Args);
654
655  bool HasNativeLLVMSupport() const override;
656
657  void
658  AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
659                            llvm::opt::ArgStringList &CC1Args) const override;
660  void
661  AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
662                               llvm::opt::ArgStringList &CC1Args) const override;
663  bool isPIEDefault() const override;
664
665  std::string Linker;
666  std::vector<std::string> ExtraOpts;
667
668protected:
669  Tool *buildAssembler() const override;
670  Tool *buildLinker() const override;
671
672private:
673  static bool addLibStdCXXIncludePaths(Twine Base, Twine Suffix,
674                                       Twine TargetArchDir, Twine IncludeSuffix,
675                                       const llvm::opt::ArgList &DriverArgs,
676                                       llvm::opt::ArgStringList &CC1Args);
677  static bool addLibStdCXXIncludePaths(Twine Base, Twine TargetArchDir,
678                                       const llvm::opt::ArgList &DriverArgs,
679                                       llvm::opt::ArgStringList &CC1Args);
680
681  std::string computeSysRoot() const;
682};
683
684class LLVM_LIBRARY_VISIBILITY Hexagon_TC : public Linux {
685protected:
686  GCCVersion GCCLibAndIncVersion;
687  Tool *buildAssembler() const override;
688  Tool *buildLinker() const override;
689
690public:
691  Hexagon_TC(const Driver &D, const llvm::Triple &Triple,
692             const llvm::opt::ArgList &Args);
693  ~Hexagon_TC();
694
695  void
696  AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
697                            llvm::opt::ArgStringList &CC1Args) const override;
698  void
699  AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
700                              llvm::opt::ArgStringList &CC1Args) const override;
701  CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
702
703  StringRef GetGCCLibAndIncVersion() const { return GCCLibAndIncVersion.Text; }
704
705  static std::string GetGnuDir(const std::string &InstalledDir);
706
707  static StringRef GetTargetCPU(const llvm::opt::ArgList &Args);
708};
709
710/// TCEToolChain - A tool chain using the llvm bitcode tools to perform
711/// all subcommands. See http://tce.cs.tut.fi for our peculiar target.
712class LLVM_LIBRARY_VISIBILITY TCEToolChain : public ToolChain {
713public:
714  TCEToolChain(const Driver &D, const llvm::Triple &Triple,
715               const llvm::opt::ArgList &Args);
716  ~TCEToolChain();
717
718  bool IsMathErrnoDefault() const override;
719  bool isPICDefault() const override;
720  bool isPIEDefault() const override;
721  bool isPICDefaultForced() const override;
722};
723
724class LLVM_LIBRARY_VISIBILITY Windows : public ToolChain {
725public:
726  Windows(const Driver &D, const llvm::Triple &Triple,
727          const llvm::opt::ArgList &Args);
728
729  bool IsIntegratedAssemblerDefault() const override;
730  bool IsUnwindTablesDefault() const override;
731  bool isPICDefault() const override;
732  bool isPIEDefault() const override;
733  bool isPICDefaultForced() const override;
734
735  void
736  AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
737                            llvm::opt::ArgStringList &CC1Args) const override;
738  void
739  AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
740                               llvm::opt::ArgStringList &CC1Args) const override;
741
742protected:
743  Tool *buildLinker() const override;
744  Tool *buildAssembler() const override;
745};
746
747
748class LLVM_LIBRARY_VISIBILITY XCore : public ToolChain {
749public:
750  XCore(const Driver &D, const llvm::Triple &Triple,
751          const llvm::opt::ArgList &Args);
752protected:
753  Tool *buildAssembler() const override;
754  Tool *buildLinker() const override;
755public:
756  bool isPICDefault() const override;
757  bool isPIEDefault() const override;
758  bool isPICDefaultForced() const override;
759  bool SupportsProfiling() const override;
760  bool hasBlocksRuntime() const override;
761  void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
762                    llvm::opt::ArgStringList &CC1Args) const override;
763  void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
764                             llvm::opt::ArgStringList &CC1Args) const override;
765  void AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
766                       llvm::opt::ArgStringList &CC1Args) const override;
767  void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
768                           llvm::opt::ArgStringList &CmdArgs) const override;
769};
770
771} // end namespace toolchains
772} // end namespace driver
773} // end namespace clang
774
775#endif
776