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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 
24 namespace clang {
25 namespace driver {
26 namespace 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.
31 class LLVM_LIBRARY_VISIBILITY Generic_GCC : public ToolChain {
32 protected:
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:
GCCInstallationDetector()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.
isValid()107     bool isValid() const { return IsValid; }
108 
109     /// \brief Get the GCC triple for the detected install.
getTriple()110     const llvm::Triple &getTriple() const { return GCCTriple; }
111 
112     /// \brief Get the detected GCC installation path.
getInstallPath()113     StringRef getInstallPath() const { return GCCInstallPath; }
114 
115     /// \brief Get the detected GCC parent lib path.
getParentLibPath()116     StringRef getParentLibPath() const { return GCCParentLibPath; }
117 
118     /// \brief Get the detected Multilib
getMultilib()119     const Multilib &getMultilib() const { return SelectedMultilib; }
120 
121     /// \brief Get the whole MultilibSet
getMultilibs()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.
getVersion()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 
152 public:
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 
165 protected:
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.
isTarget64Bit()174   bool isTarget64Bit() const { return getTriple().isArch64Bit(); }
175 
176   /// \brief Check whether the target triple's architecture is 32-bits.
isTarget32Bit()177   bool isTarget32Bit() const { return getTriple().isArch32Bit(); }
178 
179   /// @}
180 
181 private:
182   mutable std::unique_ptr<tools::gcc::Preprocess> Preprocess;
183   mutable std::unique_ptr<tools::gcc::Compile> Compile;
184 };
185 
186 class LLVM_LIBRARY_VISIBILITY MachO : public ToolChain {
187 protected:
188   Tool *buildAssembler() const override;
189   Tool *buildLinker() const override;
190   Tool *getTool(Action::ActionClass AC) const override;
191 private:
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 
196 public:
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.
AddLinkARCArgs(const llvm::opt::ArgList & Args,llvm::opt::ArgStringList & CmdArgs)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
addStartObjectFileArgs(const llvm::opt::ArgList & Args,llvm::opt::ArgStringList & CmdArgs)218   addStartObjectFileArgs(const llvm::opt::ArgList &Args,
219                          llvm::opt::ArgStringList &CmdArgs) const {}
220 
addMinVersionArgs(const llvm::opt::ArgList & Args,llvm::opt::ArgStringList & CmdArgs)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?
isKernelStatic()226   virtual bool isKernelStatic() const {
227     return false;
228   }
229 
230   /// Is the target either iOS or an iOS simulator?
isTargetIOSBased()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 
IsBlocksDefault()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   }
IsIntegratedAssemblerDefault()261   bool IsIntegratedAssemblerDefault() const override {
262     // Default integrated assembler to on for Apple's MachO targets.
263     return true;
264   }
265 
IsMathErrnoDefault()266   bool IsMathErrnoDefault() const override {
267     return false;
268   }
269 
IsEncodeExtendedBlockSignatureDefault()270   bool IsEncodeExtendedBlockSignatureDefault() const override {
271     return true;
272   }
273 
IsObjCNonFragileABIDefault()274   bool IsObjCNonFragileABIDefault() const override {
275     // Non-fragile ABI is default for everything but i386.
276     return getTriple().getArch() != llvm::Triple::x86;
277   }
278 
UseObjCMixedDispatch()279   bool UseObjCMixedDispatch() const override {
280     return true;
281   }
282 
283   bool IsUnwindTablesDefault() const override;
284 
GetDefaultRuntimeLibType()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 
SupportsObjCGC()295   bool SupportsObjCGC() const override {
296     return false;
297   }
298 
299   bool UseDwarfDebugFlags() const override;
300 
UseSjLjExceptions()301   bool UseSjLjExceptions() const override {
302     return false;
303   }
304 
305   /// }
306 };
307 
308   /// Darwin - The base Darwin tool chain.
309 class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
310 public:
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 
332 private:
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 
341 private:
342   void AddDeploymentTarget(llvm::opt::DerivedArgList &Args) const;
343 
344 public:
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 
isKernelStatic()363   bool isKernelStatic() const override {
364     return !isTargetIPhoneOS() || isIPhoneOSVersionLT(6, 0) ||
365            getTriple().getArch() == llvm::Triple::arm64;
366   }
367 
368 protected:
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.
setTarget(DarwinPlatformKind Platform,unsigned Major,unsigned Minor,unsigned Micro)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 
isTargetIPhoneOS()389   bool isTargetIPhoneOS() const {
390     assert(TargetInitialized && "Target not initialized!");
391     return TargetPlatform == IPhoneOS;
392   }
393 
isTargetIOSSimulator()394   bool isTargetIOSSimulator() const {
395     assert(TargetInitialized && "Target not initialized!");
396     return TargetPlatform == IPhoneOSSimulator;
397   }
398 
isTargetIOSBased()399   bool isTargetIOSBased() const {
400     assert(TargetInitialized && "Target not initialized!");
401     return isTargetIPhoneOS() || isTargetIOSSimulator();
402   }
403 
isTargetMacOS()404   bool isTargetMacOS() const {
405     return TargetPlatform == MacOS;
406   }
407 
isTargetInitialized()408   bool isTargetInitialized() const { return TargetInitialized; }
409 
getTargetVersion()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 
425 public:
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 
UseObjCMixedDispatch()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 
GetDefaultStackProtectorLevel(bool KernelOrKext)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.
465 class LLVM_LIBRARY_VISIBILITY DarwinClang : public Darwin {
466 public:
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 
493 class LLVM_LIBRARY_VISIBILITY Generic_ELF : public Generic_GCC {
494   virtual void anchor();
495 public:
Generic_ELF(const Driver & D,const llvm::Triple & Triple,const llvm::opt::ArgList & Args)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 
504 class LLVM_LIBRARY_VISIBILITY AuroraUX : public Generic_GCC {
505 public:
506   AuroraUX(const Driver &D, const llvm::Triple &Triple,
507            const llvm::opt::ArgList &Args);
508 
509 protected:
510   Tool *buildAssembler() const override;
511   Tool *buildLinker() const override;
512 };
513 
514 class LLVM_LIBRARY_VISIBILITY Solaris : public Generic_GCC {
515 public:
516   Solaris(const Driver &D, const llvm::Triple &Triple,
517           const llvm::opt::ArgList &Args);
518 
IsIntegratedAssemblerDefault()519   bool IsIntegratedAssemblerDefault() const override { return true; }
520 protected:
521   Tool *buildAssembler() const override;
522   Tool *buildLinker() const override;
523 
524 };
525 
526 
527 class LLVM_LIBRARY_VISIBILITY OpenBSD : public Generic_ELF {
528 public:
529   OpenBSD(const Driver &D, const llvm::Triple &Triple,
530           const llvm::opt::ArgList &Args);
531 
IsMathErrnoDefault()532   bool IsMathErrnoDefault() const override { return false; }
IsObjCNonFragileABIDefault()533   bool IsObjCNonFragileABIDefault() const override { return true; }
isPIEDefault()534   bool isPIEDefault() const override { return true; }
535 
GetDefaultStackProtectorLevel(bool KernelOrKext)536   unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
537     return 2;
538   }
539 
IsIntegratedAssemblerDefault()540   virtual bool IsIntegratedAssemblerDefault() const {
541     if (getTriple().getArch() == llvm::Triple::ppc)
542       return true;
543     return Generic_ELF::IsIntegratedAssemblerDefault();
544   }
545 
546 protected:
547   Tool *buildAssembler() const override;
548   Tool *buildLinker() const override;
549 };
550 
551 class LLVM_LIBRARY_VISIBILITY Bitrig : public Generic_ELF {
552 public:
553   Bitrig(const Driver &D, const llvm::Triple &Triple,
554          const llvm::opt::ArgList &Args);
555 
IsMathErrnoDefault()556   bool IsMathErrnoDefault() const override { return false; }
IsObjCNonFragileABIDefault()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;
GetDefaultStackProtectorLevel(bool KernelOrKext)565   unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
566      return 1;
567   }
568 
569 protected:
570   Tool *buildAssembler() const override;
571   Tool *buildLinker() const override;
572 };
573 
574 class LLVM_LIBRARY_VISIBILITY FreeBSD : public Generic_ELF {
575 public:
576   FreeBSD(const Driver &D, const llvm::Triple &Triple,
577           const llvm::opt::ArgList &Args);
578   bool HasNativeLLVMSupport() const override;
579 
IsMathErrnoDefault()580   bool IsMathErrnoDefault() const override { return false; }
IsObjCNonFragileABIDefault()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;
IsIntegratedAssemblerDefault()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;
596 protected:
597   Tool *buildAssembler() const override;
598   Tool *buildLinker() const override;
599 };
600 
601 class LLVM_LIBRARY_VISIBILITY NetBSD : public Generic_ELF {
602 public:
603   NetBSD(const Driver &D, const llvm::Triple &Triple,
604          const llvm::opt::ArgList &Args);
605 
IsMathErrnoDefault()606   bool IsMathErrnoDefault() const override { return false; }
IsObjCNonFragileABIDefault()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;
IsUnwindTablesDefault()614   bool IsUnwindTablesDefault() const override {
615     return true;
616   }
IsIntegratedAssemblerDefault()617   bool IsIntegratedAssemblerDefault() const override {
618     if (getTriple().getArch() == llvm::Triple::ppc)
619       return true;
620     return Generic_ELF::IsIntegratedAssemblerDefault();
621   }
622 
623 protected:
624   Tool *buildAssembler() const override;
625   Tool *buildLinker() const override;
626 };
627 
628 class LLVM_LIBRARY_VISIBILITY Minix : public Generic_ELF {
629 public:
630   Minix(const Driver &D, const llvm::Triple &Triple,
631         const llvm::opt::ArgList &Args);
632 
633 protected:
634   Tool *buildAssembler() const override;
635   Tool *buildLinker() const override;
636 };
637 
638 class LLVM_LIBRARY_VISIBILITY DragonFly : public Generic_ELF {
639 public:
640   DragonFly(const Driver &D, const llvm::Triple &Triple,
641             const llvm::opt::ArgList &Args);
642 
IsMathErrnoDefault()643   bool IsMathErrnoDefault() const override { return false; }
644 
645 protected:
646   Tool *buildAssembler() const override;
647   Tool *buildLinker() const override;
648 };
649 
650 class LLVM_LIBRARY_VISIBILITY Linux : public Generic_ELF {
651 public:
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 
668 protected:
669   Tool *buildAssembler() const override;
670   Tool *buildLinker() const override;
671 
672 private:
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 
684 class LLVM_LIBRARY_VISIBILITY Hexagon_TC : public Linux {
685 protected:
686   GCCVersion GCCLibAndIncVersion;
687   Tool *buildAssembler() const override;
688   Tool *buildLinker() const override;
689 
690 public:
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 
GetGCCLibAndIncVersion()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.
712 class LLVM_LIBRARY_VISIBILITY TCEToolChain : public ToolChain {
713 public:
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 
724 class LLVM_LIBRARY_VISIBILITY Windows : public ToolChain {
725 public:
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 
742 protected:
743   Tool *buildLinker() const override;
744   Tool *buildAssembler() const override;
745 };
746 
747 
748 class LLVM_LIBRARY_VISIBILITY XCore : public ToolChain {
749 public:
750   XCore(const Driver &D, const llvm::Triple &Triple,
751           const llvm::opt::ArgList &Args);
752 protected:
753   Tool *buildAssembler() const override;
754   Tool *buildLinker() const override;
755 public:
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