ToolChains.cpp revision 16a63552480b137c6ef1379d2eeb866a12183bd4 
1//===--- ToolChains.cpp - ToolChain Implementations -----------------------===//
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 "ToolChains.h"
11
12#ifdef HAVE_CLANG_CONFIG_H
13# include "clang/Config/config.h"
14#endif
15
16#include "clang/Driver/Arg.h"
17#include "clang/Driver/ArgList.h"
18#include "clang/Driver/Compilation.h"
19#include "clang/Driver/Driver.h"
20#include "clang/Driver/DriverDiagnostic.h"
21#include "clang/Driver/HostInfo.h"
22#include "clang/Driver/ObjCRuntime.h"
23#include "clang/Driver/OptTable.h"
24#include "clang/Driver/Option.h"
25#include "clang/Driver/Options.h"
26#include "clang/Basic/Version.h"
27
28#include "llvm/ADT/SmallString.h"
29#include "llvm/ADT/StringExtras.h"
30#include "llvm/ADT/StringSwitch.h"
31#include "llvm/ADT/STLExtras.h"
32#include "llvm/Support/ErrorHandling.h"
33#include "llvm/Support/FileSystem.h"
34#include "llvm/Support/MemoryBuffer.h"
35#include "llvm/Support/raw_ostream.h"
36#include "llvm/Support/Path.h"
37#include "llvm/Support/system_error.h"
38
39#include <cstdlib> // ::getenv
40
41#include "llvm/Config/config.h" // for CXX_INCLUDE_ROOT
42
43using namespace clang::driver;
44using namespace clang::driver::toolchains;
45using namespace clang;
46
47/// Darwin - Darwin tool chain for i386 and x86_64.
48
49Darwin::Darwin(const HostInfo &Host, const llvm::Triple& Triple)
50  : ToolChain(Host, Triple), TargetInitialized(false),
51    ARCRuntimeForSimulator(ARCSimulator_None),
52    LibCXXForSimulator(LibCXXSimulator_None)
53{
54  // Compute the initial Darwin version based on the host.
55  bool HadExtra;
56  std::string OSName = Triple.getOSName();
57  if (!Driver::GetReleaseVersion(&OSName.c_str()[6],
58                                 DarwinVersion[0], DarwinVersion[1],
59                                 DarwinVersion[2], HadExtra))
60    getDriver().Diag(diag::err_drv_invalid_darwin_version) << OSName;
61
62  llvm::raw_string_ostream(MacosxVersionMin)
63    << "10." << std::max(0, (int)DarwinVersion[0] - 4) << '.'
64    << DarwinVersion[1];
65}
66
67types::ID Darwin::LookupTypeForExtension(const char *Ext) const {
68  types::ID Ty = types::lookupTypeForExtension(Ext);
69
70  // Darwin always preprocesses assembly files (unless -x is used explicitly).
71  if (Ty == types::TY_PP_Asm)
72    return types::TY_Asm;
73
74  return Ty;
75}
76
77bool Darwin::HasNativeLLVMSupport() const {
78  return true;
79}
80
81bool Darwin::hasARCRuntime() const {
82  // FIXME: Remove this once there is a proper way to detect an ARC runtime
83  // for the simulator.
84  switch (ARCRuntimeForSimulator) {
85  case ARCSimulator_None:
86    break;
87  case ARCSimulator_HasARCRuntime:
88    return true;
89  case ARCSimulator_NoARCRuntime:
90    return false;
91  }
92
93  if (isTargetIPhoneOS())
94    return !isIPhoneOSVersionLT(5);
95  else
96    return !isMacosxVersionLT(10, 7);
97}
98
99/// Darwin provides an ARC runtime starting in MacOS X 10.7 and iOS 5.0.
100void Darwin::configureObjCRuntime(ObjCRuntime &runtime) const {
101  if (runtime.getKind() != ObjCRuntime::NeXT)
102    return ToolChain::configureObjCRuntime(runtime);
103
104  runtime.HasARC = runtime.HasWeak = hasARCRuntime();
105
106  // So far, objc_terminate is only available in iOS 5.
107  // FIXME: do the simulator logic properly.
108  if (!ARCRuntimeForSimulator && isTargetIPhoneOS())
109    runtime.HasTerminate = !isIPhoneOSVersionLT(5);
110  else
111    runtime.HasTerminate = false;
112}
113
114/// Darwin provides a blocks runtime starting in MacOS X 10.6 and iOS 3.2.
115bool Darwin::hasBlocksRuntime() const {
116  if (isTargetIPhoneOS())
117    return !isIPhoneOSVersionLT(3, 2);
118  else
119    return !isMacosxVersionLT(10, 6);
120}
121
122static const char *GetArmArchForMArch(StringRef Value) {
123  return llvm::StringSwitch<const char*>(Value)
124    .Case("armv6k", "armv6")
125    .Case("armv5tej", "armv5")
126    .Case("xscale", "xscale")
127    .Case("armv4t", "armv4t")
128    .Case("armv7", "armv7")
129    .Cases("armv7a", "armv7-a", "armv7")
130    .Cases("armv7r", "armv7-r", "armv7")
131    .Cases("armv7m", "armv7-m", "armv7")
132    .Default(0);
133}
134
135static const char *GetArmArchForMCpu(StringRef Value) {
136  return llvm::StringSwitch<const char *>(Value)
137    .Cases("arm9e", "arm946e-s", "arm966e-s", "arm968e-s", "arm926ej-s","armv5")
138    .Cases("arm10e", "arm10tdmi", "armv5")
139    .Cases("arm1020t", "arm1020e", "arm1022e", "arm1026ej-s", "armv5")
140    .Case("xscale", "xscale")
141    .Cases("arm1136j-s", "arm1136jf-s", "arm1176jz-s",
142           "arm1176jzf-s", "cortex-m0", "armv6")
143    .Cases("cortex-a8", "cortex-r4", "cortex-m3", "cortex-a9", "armv7")
144    .Default(0);
145}
146
147StringRef Darwin::getDarwinArchName(const ArgList &Args) const {
148  switch (getTriple().getArch()) {
149  default:
150    return getArchName();
151
152  case llvm::Triple::thumb:
153  case llvm::Triple::arm: {
154    if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
155      if (const char *Arch = GetArmArchForMArch(A->getValue(Args)))
156        return Arch;
157
158    if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
159      if (const char *Arch = GetArmArchForMCpu(A->getValue(Args)))
160        return Arch;
161
162    return "arm";
163  }
164  }
165}
166
167Darwin::~Darwin() {
168  // Free tool implementations.
169  for (llvm::DenseMap<unsigned, Tool*>::iterator
170         it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
171    delete it->second;
172}
173
174std::string Darwin::ComputeEffectiveClangTriple(const ArgList &Args,
175                                                types::ID InputType) const {
176  llvm::Triple Triple(ComputeLLVMTriple(Args, InputType));
177
178  // If the target isn't initialized (e.g., an unknown Darwin platform, return
179  // the default triple).
180  if (!isTargetInitialized())
181    return Triple.getTriple();
182
183  unsigned Version[3];
184  getTargetVersion(Version);
185
186  llvm::SmallString<16> Str;
187  llvm::raw_svector_ostream(Str)
188    << (isTargetIPhoneOS() ? "ios" : "macosx")
189    << Version[0] << "." << Version[1] << "." << Version[2];
190  Triple.setOSName(Str.str());
191
192  return Triple.getTriple();
193}
194
195Tool &Darwin::SelectTool(const Compilation &C, const JobAction &JA,
196                         const ActionList &Inputs) const {
197  Action::ActionClass Key;
198
199  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple())) {
200    // Fallback to llvm-gcc for i386 kext compiles, we don't support that ABI.
201    if (Inputs.size() == 1 &&
202        types::isCXX(Inputs[0]->getType()) &&
203        getTriple().isOSDarwin() &&
204        getTriple().getArch() == llvm::Triple::x86 &&
205        (C.getArgs().getLastArg(options::OPT_fapple_kext) ||
206         C.getArgs().getLastArg(options::OPT_mkernel)))
207      Key = JA.getKind();
208    else
209      Key = Action::AnalyzeJobClass;
210  } else
211    Key = JA.getKind();
212
213  // FIXME: This doesn't belong here, but ideally we will support static soon
214  // anyway.
215  bool HasStatic = (C.getArgs().hasArg(options::OPT_mkernel) ||
216                    C.getArgs().hasArg(options::OPT_static) ||
217                    C.getArgs().hasArg(options::OPT_fapple_kext));
218  bool IsIADefault = IsIntegratedAssemblerDefault() && !HasStatic;
219  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
220                                             options::OPT_no_integrated_as,
221                                             IsIADefault);
222
223  Tool *&T = Tools[Key];
224  if (!T) {
225    switch (Key) {
226    case Action::InputClass:
227    case Action::BindArchClass:
228      llvm_unreachable("Invalid tool kind.");
229    case Action::PreprocessJobClass:
230      T = new tools::darwin::Preprocess(*this); break;
231    case Action::AnalyzeJobClass:
232      T = new tools::Clang(*this); break;
233    case Action::PrecompileJobClass:
234    case Action::CompileJobClass:
235      T = new tools::darwin::Compile(*this); break;
236    case Action::AssembleJobClass: {
237      if (UseIntegratedAs)
238        T = new tools::ClangAs(*this);
239      else
240        T = new tools::darwin::Assemble(*this);
241      break;
242    }
243    case Action::LinkJobClass:
244      T = new tools::darwin::Link(*this); break;
245    case Action::LipoJobClass:
246      T = new tools::darwin::Lipo(*this); break;
247    case Action::DsymutilJobClass:
248      T = new tools::darwin::Dsymutil(*this); break;
249    case Action::VerifyJobClass:
250      T = new tools::darwin::VerifyDebug(*this); break;
251    }
252  }
253
254  return *T;
255}
256
257
258DarwinClang::DarwinClang(const HostInfo &Host, const llvm::Triple& Triple)
259  : Darwin(Host, Triple)
260{
261  getProgramPaths().push_back(getDriver().getInstalledDir());
262  if (getDriver().getInstalledDir() != getDriver().Dir)
263    getProgramPaths().push_back(getDriver().Dir);
264
265  // We expect 'as', 'ld', etc. to be adjacent to our install dir.
266  getProgramPaths().push_back(getDriver().getInstalledDir());
267  if (getDriver().getInstalledDir() != getDriver().Dir)
268    getProgramPaths().push_back(getDriver().Dir);
269
270  // For fallback, we need to know how to find the GCC cc1 executables, so we
271  // also add the GCC libexec paths. This is legacy code that can be removed
272  // once fallback is no longer useful.
273  AddGCCLibexecPath(DarwinVersion[0]);
274  AddGCCLibexecPath(DarwinVersion[0] - 2);
275  AddGCCLibexecPath(DarwinVersion[0] - 1);
276  AddGCCLibexecPath(DarwinVersion[0] + 1);
277  AddGCCLibexecPath(DarwinVersion[0] + 2);
278}
279
280void DarwinClang::AddGCCLibexecPath(unsigned darwinVersion) {
281  std::string ToolChainDir = "i686-apple-darwin";
282  ToolChainDir += llvm::utostr(darwinVersion);
283  ToolChainDir += "/4.2.1";
284
285  std::string Path = getDriver().Dir;
286  Path += "/../llvm-gcc-4.2/libexec/gcc/";
287  Path += ToolChainDir;
288  getProgramPaths().push_back(Path);
289
290  Path = "/usr/llvm-gcc-4.2/libexec/gcc/";
291  Path += ToolChainDir;
292  getProgramPaths().push_back(Path);
293}
294
295void DarwinClang::AddLinkSearchPathArgs(const ArgList &Args,
296                                       ArgStringList &CmdArgs) const {
297  // The Clang toolchain uses explicit paths for internal libraries.
298
299  // Unfortunately, we still might depend on a few of the libraries that are
300  // only available in the gcc library directory (in particular
301  // libstdc++.dylib). For now, hardcode the path to the known install location.
302  llvm::sys::Path P(getDriver().Dir);
303  P.eraseComponent(); // .../usr/bin -> ../usr
304  P.appendComponent("lib");
305  P.appendComponent("gcc");
306  switch (getTriple().getArch()) {
307  default:
308    llvm_unreachable("Invalid Darwin arch!");
309  case llvm::Triple::x86:
310  case llvm::Triple::x86_64:
311    P.appendComponent("i686-apple-darwin10");
312    break;
313  case llvm::Triple::arm:
314  case llvm::Triple::thumb:
315    P.appendComponent("arm-apple-darwin10");
316    break;
317  case llvm::Triple::ppc:
318  case llvm::Triple::ppc64:
319    P.appendComponent("powerpc-apple-darwin10");
320    break;
321  }
322  P.appendComponent("4.2.1");
323
324  // Determine the arch specific GCC subdirectory.
325  const char *ArchSpecificDir = 0;
326  switch (getTriple().getArch()) {
327  default:
328    break;
329  case llvm::Triple::arm:
330  case llvm::Triple::thumb: {
331    std::string Triple = ComputeLLVMTriple(Args);
332    StringRef TripleStr = Triple;
333    if (TripleStr.startswith("armv5") || TripleStr.startswith("thumbv5"))
334      ArchSpecificDir = "v5";
335    else if (TripleStr.startswith("armv6") || TripleStr.startswith("thumbv6"))
336      ArchSpecificDir = "v6";
337    else if (TripleStr.startswith("armv7") || TripleStr.startswith("thumbv7"))
338      ArchSpecificDir = "v7";
339    break;
340  }
341  case llvm::Triple::ppc64:
342    ArchSpecificDir = "ppc64";
343    break;
344  case llvm::Triple::x86_64:
345    ArchSpecificDir = "x86_64";
346    break;
347  }
348
349  if (ArchSpecificDir) {
350    P.appendComponent(ArchSpecificDir);
351    bool Exists;
352    if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)
353      CmdArgs.push_back(Args.MakeArgString("-L" + P.str()));
354    P.eraseComponent();
355  }
356
357  bool Exists;
358  if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)
359    CmdArgs.push_back(Args.MakeArgString("-L" + P.str()));
360}
361
362void DarwinClang::AddLinkARCArgs(const ArgList &Args,
363                                 ArgStringList &CmdArgs) const {
364
365  CmdArgs.push_back("-force_load");
366  llvm::sys::Path P(getDriver().ClangExecutable);
367  P.eraseComponent(); // 'clang'
368  P.eraseComponent(); // 'bin'
369  P.appendComponent("lib");
370  P.appendComponent("arc");
371  P.appendComponent("libarclite_");
372  std::string s = P.str();
373  // Mash in the platform.
374  if (isTargetIPhoneOS())
375    s += "iphoneos";
376  // FIXME: isTargetIphoneOSSimulator() is not returning true.
377  else if (ARCRuntimeForSimulator != ARCSimulator_None)
378    s += "iphonesimulator";
379  else
380    s += "macosx";
381  s += ".a";
382
383  CmdArgs.push_back(Args.MakeArgString(s));
384}
385
386void DarwinClang::AddLinkRuntimeLib(const ArgList &Args,
387                                    ArgStringList &CmdArgs,
388                                    const char *DarwinStaticLib) const {
389  llvm::sys::Path P(getDriver().ResourceDir);
390  P.appendComponent("lib");
391  P.appendComponent("darwin");
392  P.appendComponent(DarwinStaticLib);
393
394  // For now, allow missing resource libraries to support developers who may
395  // not have compiler-rt checked out or integrated into their build.
396  bool Exists;
397  if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)
398    CmdArgs.push_back(Args.MakeArgString(P.str()));
399}
400
401void DarwinClang::AddLinkRuntimeLibArgs(const ArgList &Args,
402                                        ArgStringList &CmdArgs) const {
403  // Darwin doesn't support real static executables, don't link any runtime
404  // libraries with -static.
405  if (Args.hasArg(options::OPT_static))
406    return;
407
408  // Reject -static-libgcc for now, we can deal with this when and if someone
409  // cares. This is useful in situations where someone wants to statically link
410  // something like libstdc++, and needs its runtime support routines.
411  if (const Arg *A = Args.getLastArg(options::OPT_static_libgcc)) {
412    getDriver().Diag(diag::err_drv_unsupported_opt)
413      << A->getAsString(Args);
414    return;
415  }
416
417  // Otherwise link libSystem, then the dynamic runtime library, and finally any
418  // target specific static runtime library.
419  CmdArgs.push_back("-lSystem");
420
421  // Select the dynamic runtime library and the target specific static library.
422  if (isTargetIPhoneOS()) {
423    // If we are compiling as iOS / simulator, don't attempt to link libgcc_s.1,
424    // it never went into the SDK.
425    // Linking against libgcc_s.1 isn't needed for iOS 5.0+
426    if (isIPhoneOSVersionLT(5, 0) && !isTargetIOSSimulator())
427      CmdArgs.push_back("-lgcc_s.1");
428
429    // We currently always need a static runtime library for iOS.
430    AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.ios.a");
431  } else {
432    // The dynamic runtime library was merged with libSystem for 10.6 and
433    // beyond; only 10.4 and 10.5 need an additional runtime library.
434    if (isMacosxVersionLT(10, 5))
435      CmdArgs.push_back("-lgcc_s.10.4");
436    else if (isMacosxVersionLT(10, 6))
437      CmdArgs.push_back("-lgcc_s.10.5");
438
439    // For OS X, we thought we would only need a static runtime library when
440    // targeting 10.4, to provide versions of the static functions which were
441    // omitted from 10.4.dylib.
442    //
443    // Unfortunately, that turned out to not be true, because Darwin system
444    // headers can still use eprintf on i386, and it is not exported from
445    // libSystem. Therefore, we still must provide a runtime library just for
446    // the tiny tiny handful of projects that *might* use that symbol.
447    if (isMacosxVersionLT(10, 5)) {
448      AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.10.4.a");
449    } else {
450      if (getTriple().getArch() == llvm::Triple::x86)
451        AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.eprintf.a");
452      AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.osx.a");
453    }
454  }
455}
456
457static inline StringRef SimulatorVersionDefineName() {
458  return "__IPHONE_OS_VERSION_MIN_REQUIRED";
459}
460
461/// \brief Parse the simulator version define:
462/// __IPHONE_OS_VERSION_MIN_REQUIRED=([0-9])([0-9][0-9])([0-9][0-9])
463// and return the grouped values as integers, e.g:
464//   __IPHONE_OS_VERSION_MIN_REQUIRED=40201
465// will return Major=4, Minor=2, Micro=1.
466static bool GetVersionFromSimulatorDefine(StringRef define,
467                                          unsigned &Major, unsigned &Minor,
468                                          unsigned &Micro) {
469  assert(define.startswith(SimulatorVersionDefineName()));
470  StringRef name, version;
471  llvm::tie(name, version) = define.split('=');
472  if (version.empty())
473    return false;
474  std::string verstr = version.str();
475  char *end;
476  unsigned num = (unsigned) strtol(verstr.c_str(), &end, 10);
477  if (*end != '\0')
478    return false;
479  Major = num / 10000;
480  num = num % 10000;
481  Minor = num / 100;
482  Micro = num % 100;
483  return true;
484}
485
486void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
487  const OptTable &Opts = getDriver().getOpts();
488
489  Arg *OSXVersion = Args.getLastArg(options::OPT_mmacosx_version_min_EQ);
490  Arg *iOSVersion = Args.getLastArg(options::OPT_miphoneos_version_min_EQ);
491  Arg *iOSSimVersion = Args.getLastArg(
492    options::OPT_mios_simulator_version_min_EQ);
493
494  // FIXME: HACK! When compiling for the simulator we don't get a
495  // '-miphoneos-version-min' to help us know whether there is an ARC runtime
496  // or not; try to parse a __IPHONE_OS_VERSION_MIN_REQUIRED
497  // define passed in command-line.
498  if (!iOSVersion) {
499    for (arg_iterator it = Args.filtered_begin(options::OPT_D),
500           ie = Args.filtered_end(); it != ie; ++it) {
501      StringRef define = (*it)->getValue(Args);
502      if (define.startswith(SimulatorVersionDefineName())) {
503        unsigned Major = 0, Minor = 0, Micro = 0;
504        if (GetVersionFromSimulatorDefine(define, Major, Minor, Micro) &&
505            Major < 10 && Minor < 100 && Micro < 100) {
506          ARCRuntimeForSimulator = Major < 5 ? ARCSimulator_NoARCRuntime
507                                             : ARCSimulator_HasARCRuntime;
508          LibCXXForSimulator = Major < 5 ? LibCXXSimulator_NotAvailable
509                                         : LibCXXSimulator_Available;
510        }
511        break;
512      }
513    }
514  }
515
516  if (OSXVersion && (iOSVersion || iOSSimVersion)) {
517    getDriver().Diag(diag::err_drv_argument_not_allowed_with)
518          << OSXVersion->getAsString(Args)
519          << (iOSVersion ? iOSVersion : iOSSimVersion)->getAsString(Args);
520    iOSVersion = iOSSimVersion = 0;
521  } else if (iOSVersion && iOSSimVersion) {
522    getDriver().Diag(diag::err_drv_argument_not_allowed_with)
523          << iOSVersion->getAsString(Args)
524          << iOSSimVersion->getAsString(Args);
525    iOSSimVersion = 0;
526  } else if (!OSXVersion && !iOSVersion && !iOSSimVersion) {
527    // If no deployment target was specified on the command line, check for
528    // environment defines.
529    StringRef OSXTarget;
530    StringRef iOSTarget;
531    StringRef iOSSimTarget;
532    if (char *env = ::getenv("MACOSX_DEPLOYMENT_TARGET"))
533      OSXTarget = env;
534    if (char *env = ::getenv("IPHONEOS_DEPLOYMENT_TARGET"))
535      iOSTarget = env;
536    if (char *env = ::getenv("IOS_SIMULATOR_DEPLOYMENT_TARGET"))
537      iOSSimTarget = env;
538
539    // If no '-miphoneos-version-min' specified on the command line and
540    // IPHONEOS_DEPLOYMENT_TARGET is not defined, see if we can set the default
541    // based on isysroot.
542    if (iOSTarget.empty()) {
543      if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) {
544        StringRef first, second;
545        StringRef isysroot = A->getValue(Args);
546        llvm::tie(first, second) = isysroot.split(StringRef("SDKs/iPhoneOS"));
547        if (second != "")
548          iOSTarget = second.substr(0,3);
549      }
550    }
551
552    // If no OSX or iOS target has been specified and we're compiling for armv7,
553    // go ahead as assume we're targeting iOS.
554    if (OSXTarget.empty() && iOSTarget.empty())
555      if (getDarwinArchName(Args) == "armv7")
556        iOSTarget = "0.0";
557
558    // Handle conflicting deployment targets
559    //
560    // FIXME: Don't hardcode default here.
561
562    // Do not allow conflicts with the iOS simulator target.
563    if (!iOSSimTarget.empty() && (!OSXTarget.empty() || !iOSTarget.empty())) {
564      getDriver().Diag(diag::err_drv_conflicting_deployment_targets)
565        << "IOS_SIMULATOR_DEPLOYMENT_TARGET"
566        << (!OSXTarget.empty() ? "MACOSX_DEPLOYMENT_TARGET" :
567            "IPHONEOS_DEPLOYMENT_TARGET");
568    }
569
570    // Allow conflicts among OSX and iOS for historical reasons, but choose the
571    // default platform.
572    if (!OSXTarget.empty() && !iOSTarget.empty()) {
573      if (getTriple().getArch() == llvm::Triple::arm ||
574          getTriple().getArch() == llvm::Triple::thumb)
575        OSXTarget = "";
576      else
577        iOSTarget = "";
578    }
579
580    if (!OSXTarget.empty()) {
581      const Option *O = Opts.getOption(options::OPT_mmacosx_version_min_EQ);
582      OSXVersion = Args.MakeJoinedArg(0, O, OSXTarget);
583      Args.append(OSXVersion);
584    } else if (!iOSTarget.empty()) {
585      const Option *O = Opts.getOption(options::OPT_miphoneos_version_min_EQ);
586      iOSVersion = Args.MakeJoinedArg(0, O, iOSTarget);
587      Args.append(iOSVersion);
588    } else if (!iOSSimTarget.empty()) {
589      const Option *O = Opts.getOption(
590        options::OPT_mios_simulator_version_min_EQ);
591      iOSSimVersion = Args.MakeJoinedArg(0, O, iOSSimTarget);
592      Args.append(iOSSimVersion);
593    } else {
594      // Otherwise, assume we are targeting OS X.
595      const Option *O = Opts.getOption(options::OPT_mmacosx_version_min_EQ);
596      OSXVersion = Args.MakeJoinedArg(0, O, MacosxVersionMin);
597      Args.append(OSXVersion);
598    }
599  }
600
601  // Reject invalid architecture combinations.
602  if (iOSSimVersion && (getTriple().getArch() != llvm::Triple::x86 &&
603                        getTriple().getArch() != llvm::Triple::x86_64)) {
604    getDriver().Diag(diag::err_drv_invalid_arch_for_deployment_target)
605      << getTriple().getArchName() << iOSSimVersion->getAsString(Args);
606  }
607
608  // Set the tool chain target information.
609  unsigned Major, Minor, Micro;
610  bool HadExtra;
611  if (OSXVersion) {
612    assert((!iOSVersion && !iOSSimVersion) && "Unknown target platform!");
613    if (!Driver::GetReleaseVersion(OSXVersion->getValue(Args), Major, Minor,
614                                   Micro, HadExtra) || HadExtra ||
615        Major != 10 || Minor >= 100 || Micro >= 100)
616      getDriver().Diag(diag::err_drv_invalid_version_number)
617        << OSXVersion->getAsString(Args);
618  } else {
619    const Arg *Version = iOSVersion ? iOSVersion : iOSSimVersion;
620    assert(Version && "Unknown target platform!");
621    if (!Driver::GetReleaseVersion(Version->getValue(Args), Major, Minor,
622                                   Micro, HadExtra) || HadExtra ||
623        Major >= 10 || Minor >= 100 || Micro >= 100)
624      getDriver().Diag(diag::err_drv_invalid_version_number)
625        << Version->getAsString(Args);
626  }
627
628  bool IsIOSSim = bool(iOSSimVersion);
629
630  // In GCC, the simulator historically was treated as being OS X in some
631  // contexts, like determining the link logic, despite generally being called
632  // with an iOS deployment target. For compatibility, we detect the
633  // simulator as iOS + x86, and treat it differently in a few contexts.
634  if (iOSVersion && (getTriple().getArch() == llvm::Triple::x86 ||
635                     getTriple().getArch() == llvm::Triple::x86_64))
636    IsIOSSim = true;
637
638  setTarget(/*IsIPhoneOS=*/ !OSXVersion, Major, Minor, Micro, IsIOSSim);
639}
640
641void DarwinClang::AddCXXStdlibLibArgs(const ArgList &Args,
642                                      ArgStringList &CmdArgs) const {
643  CXXStdlibType Type = GetCXXStdlibType(Args);
644
645  switch (Type) {
646  case ToolChain::CST_Libcxx:
647    CmdArgs.push_back("-lc++");
648    break;
649
650  case ToolChain::CST_Libstdcxx: {
651    // Unfortunately, -lstdc++ doesn't always exist in the standard search path;
652    // it was previously found in the gcc lib dir. However, for all the Darwin
653    // platforms we care about it was -lstdc++.6, so we search for that
654    // explicitly if we can't see an obvious -lstdc++ candidate.
655
656    // Check in the sysroot first.
657    bool Exists;
658    if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) {
659      llvm::sys::Path P(A->getValue(Args));
660      P.appendComponent("usr");
661      P.appendComponent("lib");
662      P.appendComponent("libstdc++.dylib");
663
664      if (llvm::sys::fs::exists(P.str(), Exists) || !Exists) {
665        P.eraseComponent();
666        P.appendComponent("libstdc++.6.dylib");
667        if (!llvm::sys::fs::exists(P.str(), Exists) && Exists) {
668          CmdArgs.push_back(Args.MakeArgString(P.str()));
669          return;
670        }
671      }
672    }
673
674    // Otherwise, look in the root.
675    if ((llvm::sys::fs::exists("/usr/lib/libstdc++.dylib", Exists) || !Exists)&&
676      (!llvm::sys::fs::exists("/usr/lib/libstdc++.6.dylib", Exists) && Exists)){
677      CmdArgs.push_back("/usr/lib/libstdc++.6.dylib");
678      return;
679    }
680
681    // Otherwise, let the linker search.
682    CmdArgs.push_back("-lstdc++");
683    break;
684  }
685  }
686}
687
688void DarwinClang::AddCCKextLibArgs(const ArgList &Args,
689                                   ArgStringList &CmdArgs) const {
690
691  // For Darwin platforms, use the compiler-rt-based support library
692  // instead of the gcc-provided one (which is also incidentally
693  // only present in the gcc lib dir, which makes it hard to find).
694
695  llvm::sys::Path P(getDriver().ResourceDir);
696  P.appendComponent("lib");
697  P.appendComponent("darwin");
698  P.appendComponent("libclang_rt.cc_kext.a");
699
700  // For now, allow missing resource libraries to support developers who may
701  // not have compiler-rt checked out or integrated into their build.
702  bool Exists;
703  if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)
704    CmdArgs.push_back(Args.MakeArgString(P.str()));
705}
706
707DerivedArgList *Darwin::TranslateArgs(const DerivedArgList &Args,
708                                      const char *BoundArch) const {
709  DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
710  const OptTable &Opts = getDriver().getOpts();
711
712  // FIXME: We really want to get out of the tool chain level argument
713  // translation business, as it makes the driver functionality much
714  // more opaque. For now, we follow gcc closely solely for the
715  // purpose of easily achieving feature parity & testability. Once we
716  // have something that works, we should reevaluate each translation
717  // and try to push it down into tool specific logic.
718
719  for (ArgList::const_iterator it = Args.begin(),
720         ie = Args.end(); it != ie; ++it) {
721    Arg *A = *it;
722
723    if (A->getOption().matches(options::OPT_Xarch__)) {
724      // Skip this argument unless the architecture matches either the toolchain
725      // triple arch, or the arch being bound.
726      //
727      // FIXME: Canonicalize name.
728      StringRef XarchArch = A->getValue(Args, 0);
729      if (!(XarchArch == getArchName()  ||
730            (BoundArch && XarchArch == BoundArch)))
731        continue;
732
733      Arg *OriginalArg = A;
734      unsigned Index = Args.getBaseArgs().MakeIndex(A->getValue(Args, 1));
735      unsigned Prev = Index;
736      Arg *XarchArg = Opts.ParseOneArg(Args, Index);
737
738      // If the argument parsing failed or more than one argument was
739      // consumed, the -Xarch_ argument's parameter tried to consume
740      // extra arguments. Emit an error and ignore.
741      //
742      // We also want to disallow any options which would alter the
743      // driver behavior; that isn't going to work in our model. We
744      // use isDriverOption() as an approximation, although things
745      // like -O4 are going to slip through.
746      if (!XarchArg || Index > Prev + 1) {
747        getDriver().Diag(diag::err_drv_invalid_Xarch_argument_with_args)
748          << A->getAsString(Args);
749        continue;
750      } else if (XarchArg->getOption().isDriverOption()) {
751        getDriver().Diag(diag::err_drv_invalid_Xarch_argument_isdriver)
752          << A->getAsString(Args);
753        continue;
754      }
755
756      XarchArg->setBaseArg(A);
757      A = XarchArg;
758
759      DAL->AddSynthesizedArg(A);
760
761      // Linker input arguments require custom handling. The problem is that we
762      // have already constructed the phase actions, so we can not treat them as
763      // "input arguments".
764      if (A->getOption().isLinkerInput()) {
765        // Convert the argument into individual Zlinker_input_args.
766        for (unsigned i = 0, e = A->getNumValues(); i != e; ++i) {
767          DAL->AddSeparateArg(OriginalArg,
768                              Opts.getOption(options::OPT_Zlinker_input),
769                              A->getValue(Args, i));
770
771        }
772        continue;
773      }
774    }
775
776    // Sob. These is strictly gcc compatible for the time being. Apple
777    // gcc translates options twice, which means that self-expanding
778    // options add duplicates.
779    switch ((options::ID) A->getOption().getID()) {
780    default:
781      DAL->append(A);
782      break;
783
784    case options::OPT_mkernel:
785    case options::OPT_fapple_kext:
786      DAL->append(A);
787      DAL->AddFlagArg(A, Opts.getOption(options::OPT_static));
788      break;
789
790    case options::OPT_dependency_file:
791      DAL->AddSeparateArg(A, Opts.getOption(options::OPT_MF),
792                          A->getValue(Args));
793      break;
794
795    case options::OPT_gfull:
796      DAL->AddFlagArg(A, Opts.getOption(options::OPT_g_Flag));
797      DAL->AddFlagArg(A,
798               Opts.getOption(options::OPT_fno_eliminate_unused_debug_symbols));
799      break;
800
801    case options::OPT_gused:
802      DAL->AddFlagArg(A, Opts.getOption(options::OPT_g_Flag));
803      DAL->AddFlagArg(A,
804             Opts.getOption(options::OPT_feliminate_unused_debug_symbols));
805      break;
806
807    case options::OPT_shared:
808      DAL->AddFlagArg(A, Opts.getOption(options::OPT_dynamiclib));
809      break;
810
811    case options::OPT_fconstant_cfstrings:
812      DAL->AddFlagArg(A, Opts.getOption(options::OPT_mconstant_cfstrings));
813      break;
814
815    case options::OPT_fno_constant_cfstrings:
816      DAL->AddFlagArg(A, Opts.getOption(options::OPT_mno_constant_cfstrings));
817      break;
818
819    case options::OPT_Wnonportable_cfstrings:
820      DAL->AddFlagArg(A,
821                      Opts.getOption(options::OPT_mwarn_nonportable_cfstrings));
822      break;
823
824    case options::OPT_Wno_nonportable_cfstrings:
825      DAL->AddFlagArg(A,
826                   Opts.getOption(options::OPT_mno_warn_nonportable_cfstrings));
827      break;
828
829    case options::OPT_fpascal_strings:
830      DAL->AddFlagArg(A, Opts.getOption(options::OPT_mpascal_strings));
831      break;
832
833    case options::OPT_fno_pascal_strings:
834      DAL->AddFlagArg(A, Opts.getOption(options::OPT_mno_pascal_strings));
835      break;
836    }
837  }
838
839  if (getTriple().getArch() == llvm::Triple::x86 ||
840      getTriple().getArch() == llvm::Triple::x86_64)
841    if (!Args.hasArgNoClaim(options::OPT_mtune_EQ))
842      DAL->AddJoinedArg(0, Opts.getOption(options::OPT_mtune_EQ), "core2");
843
844  // Add the arch options based on the particular spelling of -arch, to match
845  // how the driver driver works.
846  if (BoundArch) {
847    StringRef Name = BoundArch;
848    const Option *MCpu = Opts.getOption(options::OPT_mcpu_EQ);
849    const Option *MArch = Opts.getOption(options::OPT_march_EQ);
850
851    // This code must be kept in sync with LLVM's getArchTypeForDarwinArch,
852    // which defines the list of which architectures we accept.
853    if (Name == "ppc")
854      ;
855    else if (Name == "ppc601")
856      DAL->AddJoinedArg(0, MCpu, "601");
857    else if (Name == "ppc603")
858      DAL->AddJoinedArg(0, MCpu, "603");
859    else if (Name == "ppc604")
860      DAL->AddJoinedArg(0, MCpu, "604");
861    else if (Name == "ppc604e")
862      DAL->AddJoinedArg(0, MCpu, "604e");
863    else if (Name == "ppc750")
864      DAL->AddJoinedArg(0, MCpu, "750");
865    else if (Name == "ppc7400")
866      DAL->AddJoinedArg(0, MCpu, "7400");
867    else if (Name == "ppc7450")
868      DAL->AddJoinedArg(0, MCpu, "7450");
869    else if (Name == "ppc970")
870      DAL->AddJoinedArg(0, MCpu, "970");
871
872    else if (Name == "ppc64")
873      DAL->AddFlagArg(0, Opts.getOption(options::OPT_m64));
874
875    else if (Name == "i386")
876      ;
877    else if (Name == "i486")
878      DAL->AddJoinedArg(0, MArch, "i486");
879    else if (Name == "i586")
880      DAL->AddJoinedArg(0, MArch, "i586");
881    else if (Name == "i686")
882      DAL->AddJoinedArg(0, MArch, "i686");
883    else if (Name == "pentium")
884      DAL->AddJoinedArg(0, MArch, "pentium");
885    else if (Name == "pentium2")
886      DAL->AddJoinedArg(0, MArch, "pentium2");
887    else if (Name == "pentpro")
888      DAL->AddJoinedArg(0, MArch, "pentiumpro");
889    else if (Name == "pentIIm3")
890      DAL->AddJoinedArg(0, MArch, "pentium2");
891
892    else if (Name == "x86_64")
893      DAL->AddFlagArg(0, Opts.getOption(options::OPT_m64));
894
895    else if (Name == "arm")
896      DAL->AddJoinedArg(0, MArch, "armv4t");
897    else if (Name == "armv4t")
898      DAL->AddJoinedArg(0, MArch, "armv4t");
899    else if (Name == "armv5")
900      DAL->AddJoinedArg(0, MArch, "armv5tej");
901    else if (Name == "xscale")
902      DAL->AddJoinedArg(0, MArch, "xscale");
903    else if (Name == "armv6")
904      DAL->AddJoinedArg(0, MArch, "armv6k");
905    else if (Name == "armv7")
906      DAL->AddJoinedArg(0, MArch, "armv7a");
907
908    else
909      llvm_unreachable("invalid Darwin arch");
910  }
911
912  // Add an explicit version min argument for the deployment target. We do this
913  // after argument translation because -Xarch_ arguments may add a version min
914  // argument.
915  AddDeploymentTarget(*DAL);
916
917  // Validate the C++ standard library choice.
918  CXXStdlibType Type = GetCXXStdlibType(*DAL);
919  if (Type == ToolChain::CST_Libcxx) {
920    switch (LibCXXForSimulator) {
921    case LibCXXSimulator_None:
922      // Handle non-simulator cases.
923      if (isTargetIPhoneOS()) {
924        if (isIPhoneOSVersionLT(5, 0)) {
925          getDriver().Diag(clang::diag::err_drv_invalid_libcxx_deployment)
926            << "iOS 5.0";
927        }
928      }
929      break;
930    case LibCXXSimulator_NotAvailable:
931      getDriver().Diag(clang::diag::err_drv_invalid_libcxx_deployment)
932        << "iOS 5.0";
933      break;
934    case LibCXXSimulator_Available:
935      break;
936    }
937  }
938
939  return DAL;
940}
941
942bool Darwin::IsUnwindTablesDefault() const {
943  // FIXME: Gross; we should probably have some separate target
944  // definition, possibly even reusing the one in clang.
945  return getArchName() == "x86_64";
946}
947
948bool Darwin::UseDwarfDebugFlags() const {
949  if (const char *S = ::getenv("RC_DEBUG_OPTIONS"))
950    return S[0] != '\0';
951  return false;
952}
953
954bool Darwin::UseSjLjExceptions() const {
955  // Darwin uses SjLj exceptions on ARM.
956  return (getTriple().getArch() == llvm::Triple::arm ||
957          getTriple().getArch() == llvm::Triple::thumb);
958}
959
960const char *Darwin::GetDefaultRelocationModel() const {
961  return "pic";
962}
963
964const char *Darwin::GetForcedPicModel() const {
965  if (getArchName() == "x86_64")
966    return "pic";
967  return 0;
968}
969
970bool Darwin::SupportsProfiling() const {
971  // Profiling instrumentation is only supported on x86.
972  return getArchName() == "i386" || getArchName() == "x86_64";
973}
974
975bool Darwin::SupportsObjCGC() const {
976  // Garbage collection is supported everywhere except on iPhone OS.
977  return !isTargetIPhoneOS();
978}
979
980std::string
981Darwin_Generic_GCC::ComputeEffectiveClangTriple(const ArgList &Args,
982                                                types::ID InputType) const {
983  return ComputeLLVMTriple(Args, InputType);
984}
985
986/// Generic_GCC - A tool chain using the 'gcc' command to perform
987/// all subcommands; this relies on gcc translating the majority of
988/// command line options.
989
990Generic_GCC::Generic_GCC(const HostInfo &Host, const llvm::Triple& Triple)
991  : ToolChain(Host, Triple) {
992  getProgramPaths().push_back(getDriver().getInstalledDir());
993  if (getDriver().getInstalledDir() != getDriver().Dir)
994    getProgramPaths().push_back(getDriver().Dir);
995}
996
997Generic_GCC::~Generic_GCC() {
998  // Free tool implementations.
999  for (llvm::DenseMap<unsigned, Tool*>::iterator
1000         it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
1001    delete it->second;
1002}
1003
1004Tool &Generic_GCC::SelectTool(const Compilation &C,
1005                              const JobAction &JA,
1006                              const ActionList &Inputs) const {
1007  Action::ActionClass Key;
1008  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1009    Key = Action::AnalyzeJobClass;
1010  else
1011    Key = JA.getKind();
1012
1013  Tool *&T = Tools[Key];
1014  if (!T) {
1015    switch (Key) {
1016    case Action::InputClass:
1017    case Action::BindArchClass:
1018      llvm_unreachable("Invalid tool kind.");
1019    case Action::PreprocessJobClass:
1020      T = new tools::gcc::Preprocess(*this); break;
1021    case Action::PrecompileJobClass:
1022      T = new tools::gcc::Precompile(*this); break;
1023    case Action::AnalyzeJobClass:
1024      T = new tools::Clang(*this); break;
1025    case Action::CompileJobClass:
1026      T = new tools::gcc::Compile(*this); break;
1027    case Action::AssembleJobClass:
1028      T = new tools::gcc::Assemble(*this); break;
1029    case Action::LinkJobClass:
1030      T = new tools::gcc::Link(*this); break;
1031
1032      // This is a bit ungeneric, but the only platform using a driver
1033      // driver is Darwin.
1034    case Action::LipoJobClass:
1035      T = new tools::darwin::Lipo(*this); break;
1036    case Action::DsymutilJobClass:
1037      T = new tools::darwin::Dsymutil(*this); break;
1038    case Action::VerifyJobClass:
1039      T = new tools::darwin::VerifyDebug(*this); break;
1040    }
1041  }
1042
1043  return *T;
1044}
1045
1046bool Generic_GCC::IsUnwindTablesDefault() const {
1047  // FIXME: Gross; we should probably have some separate target
1048  // definition, possibly even reusing the one in clang.
1049  return getArchName() == "x86_64";
1050}
1051
1052const char *Generic_GCC::GetDefaultRelocationModel() const {
1053  return "static";
1054}
1055
1056const char *Generic_GCC::GetForcedPicModel() const {
1057  return 0;
1058}
1059
1060/// TCEToolChain - A tool chain using the llvm bitcode tools to perform
1061/// all subcommands. See http://tce.cs.tut.fi for our peculiar target.
1062/// Currently does not support anything else but compilation.
1063
1064TCEToolChain::TCEToolChain(const HostInfo &Host, const llvm::Triple& Triple)
1065  : ToolChain(Host, Triple) {
1066  // Path mangling to find libexec
1067  std::string Path(getDriver().Dir);
1068
1069  Path += "/../libexec";
1070  getProgramPaths().push_back(Path);
1071}
1072
1073TCEToolChain::~TCEToolChain() {
1074  for (llvm::DenseMap<unsigned, Tool*>::iterator
1075           it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
1076      delete it->second;
1077}
1078
1079bool TCEToolChain::IsMathErrnoDefault() const {
1080  return true;
1081}
1082
1083bool TCEToolChain::IsUnwindTablesDefault() const {
1084  return false;
1085}
1086
1087const char *TCEToolChain::GetDefaultRelocationModel() const {
1088  return "static";
1089}
1090
1091const char *TCEToolChain::GetForcedPicModel() const {
1092  return 0;
1093}
1094
1095Tool &TCEToolChain::SelectTool(const Compilation &C,
1096                            const JobAction &JA,
1097                               const ActionList &Inputs) const {
1098  Action::ActionClass Key;
1099  Key = Action::AnalyzeJobClass;
1100
1101  Tool *&T = Tools[Key];
1102  if (!T) {
1103    switch (Key) {
1104    case Action::PreprocessJobClass:
1105      T = new tools::gcc::Preprocess(*this); break;
1106    case Action::AnalyzeJobClass:
1107      T = new tools::Clang(*this); break;
1108    default:
1109     llvm_unreachable("Unsupported action for TCE target.");
1110    }
1111  }
1112  return *T;
1113}
1114
1115/// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly.
1116
1117OpenBSD::OpenBSD(const HostInfo &Host, const llvm::Triple& Triple)
1118  : Generic_ELF(Host, Triple) {
1119  getFilePaths().push_back(getDriver().Dir + "/../lib");
1120  getFilePaths().push_back("/usr/lib");
1121}
1122
1123Tool &OpenBSD::SelectTool(const Compilation &C, const JobAction &JA,
1124                          const ActionList &Inputs) const {
1125  Action::ActionClass Key;
1126  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1127    Key = Action::AnalyzeJobClass;
1128  else
1129    Key = JA.getKind();
1130
1131  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
1132                                             options::OPT_no_integrated_as,
1133                                             IsIntegratedAssemblerDefault());
1134
1135  Tool *&T = Tools[Key];
1136  if (!T) {
1137    switch (Key) {
1138    case Action::AssembleJobClass: {
1139      if (UseIntegratedAs)
1140        T = new tools::ClangAs(*this);
1141      else
1142        T = new tools::openbsd::Assemble(*this);
1143      break;
1144    }
1145    case Action::LinkJobClass:
1146      T = new tools::openbsd::Link(*this); break;
1147    default:
1148      T = &Generic_GCC::SelectTool(C, JA, Inputs);
1149    }
1150  }
1151
1152  return *T;
1153}
1154
1155/// FreeBSD - FreeBSD tool chain which can call as(1) and ld(1) directly.
1156
1157FreeBSD::FreeBSD(const HostInfo &Host, const llvm::Triple& Triple)
1158  : Generic_ELF(Host, Triple) {
1159
1160  // Determine if we are compiling 32-bit code on an x86_64 platform.
1161  bool Lib32 = false;
1162  if (Triple.getArch() == llvm::Triple::x86 &&
1163      llvm::Triple(getDriver().DefaultHostTriple).getArch() ==
1164        llvm::Triple::x86_64)
1165    Lib32 = true;
1166
1167  if (Triple.getArch() == llvm::Triple::ppc &&
1168      llvm::Triple(getDriver().DefaultHostTriple).getArch() ==
1169        llvm::Triple::ppc64)
1170    Lib32 = true;
1171
1172  if (Lib32) {
1173    getFilePaths().push_back("/usr/lib32");
1174  } else {
1175    getFilePaths().push_back("/usr/lib");
1176  }
1177}
1178
1179Tool &FreeBSD::SelectTool(const Compilation &C, const JobAction &JA,
1180                          const ActionList &Inputs) const {
1181  Action::ActionClass Key;
1182  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1183    Key = Action::AnalyzeJobClass;
1184  else
1185    Key = JA.getKind();
1186
1187  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
1188                                             options::OPT_no_integrated_as,
1189                                             IsIntegratedAssemblerDefault());
1190
1191  Tool *&T = Tools[Key];
1192  if (!T) {
1193    switch (Key) {
1194    case Action::AssembleJobClass:
1195      if (UseIntegratedAs)
1196        T = new tools::ClangAs(*this);
1197      else
1198        T = new tools::freebsd::Assemble(*this);
1199      break;
1200    case Action::LinkJobClass:
1201      T = new tools::freebsd::Link(*this); break;
1202    default:
1203      T = &Generic_GCC::SelectTool(C, JA, Inputs);
1204    }
1205  }
1206
1207  return *T;
1208}
1209
1210/// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
1211
1212NetBSD::NetBSD(const HostInfo &Host, const llvm::Triple& Triple,
1213               const llvm::Triple& ToolTriple)
1214  : Generic_ELF(Host, Triple), ToolTriple(ToolTriple) {
1215
1216  // Determine if we are compiling 32-bit code on an x86_64 platform.
1217  bool Lib32 = false;
1218  if (ToolTriple.getArch() == llvm::Triple::x86_64 &&
1219      Triple.getArch() == llvm::Triple::x86)
1220    Lib32 = true;
1221
1222  if (getDriver().UseStdLib) {
1223    if (Lib32)
1224      getFilePaths().push_back("=/usr/lib/i386");
1225    else
1226      getFilePaths().push_back("=/usr/lib");
1227  }
1228}
1229
1230Tool &NetBSD::SelectTool(const Compilation &C, const JobAction &JA,
1231                         const ActionList &Inputs) const {
1232  Action::ActionClass Key;
1233  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1234    Key = Action::AnalyzeJobClass;
1235  else
1236    Key = JA.getKind();
1237
1238  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
1239                                             options::OPT_no_integrated_as,
1240                                             IsIntegratedAssemblerDefault());
1241
1242  Tool *&T = Tools[Key];
1243  if (!T) {
1244    switch (Key) {
1245    case Action::AssembleJobClass:
1246      if (UseIntegratedAs)
1247        T = new tools::ClangAs(*this);
1248      else
1249        T = new tools::netbsd::Assemble(*this, ToolTriple);
1250      break;
1251    case Action::LinkJobClass:
1252      T = new tools::netbsd::Link(*this, ToolTriple);
1253      break;
1254    default:
1255      T = &Generic_GCC::SelectTool(C, JA, Inputs);
1256    }
1257  }
1258
1259  return *T;
1260}
1261
1262/// Minix - Minix tool chain which can call as(1) and ld(1) directly.
1263
1264Minix::Minix(const HostInfo &Host, const llvm::Triple& Triple)
1265  : Generic_GCC(Host, Triple) {
1266  getFilePaths().push_back(getDriver().Dir + "/../lib");
1267  getFilePaths().push_back("/usr/lib");
1268  getFilePaths().push_back("/usr/gnu/lib");
1269  getFilePaths().push_back("/usr/gnu/lib/gcc/i686-pc-minix/4.4.3");
1270}
1271
1272Tool &Minix::SelectTool(const Compilation &C, const JobAction &JA,
1273                        const ActionList &Inputs) const {
1274  Action::ActionClass Key;
1275  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1276    Key = Action::AnalyzeJobClass;
1277  else
1278    Key = JA.getKind();
1279
1280  Tool *&T = Tools[Key];
1281  if (!T) {
1282    switch (Key) {
1283    case Action::AssembleJobClass:
1284      T = new tools::minix::Assemble(*this); break;
1285    case Action::LinkJobClass:
1286      T = new tools::minix::Link(*this); break;
1287    default:
1288      T = &Generic_GCC::SelectTool(C, JA, Inputs);
1289    }
1290  }
1291
1292  return *T;
1293}
1294
1295/// AuroraUX - AuroraUX tool chain which can call as(1) and ld(1) directly.
1296
1297AuroraUX::AuroraUX(const HostInfo &Host, const llvm::Triple& Triple)
1298  : Generic_GCC(Host, Triple) {
1299
1300  getProgramPaths().push_back(getDriver().getInstalledDir());
1301  if (getDriver().getInstalledDir() != getDriver().Dir)
1302    getProgramPaths().push_back(getDriver().Dir);
1303
1304  getFilePaths().push_back(getDriver().Dir + "/../lib");
1305  getFilePaths().push_back("/usr/lib");
1306  getFilePaths().push_back("/usr/sfw/lib");
1307  getFilePaths().push_back("/opt/gcc4/lib");
1308  getFilePaths().push_back("/opt/gcc4/lib/gcc/i386-pc-solaris2.11/4.2.4");
1309
1310}
1311
1312Tool &AuroraUX::SelectTool(const Compilation &C, const JobAction &JA,
1313                           const ActionList &Inputs) const {
1314  Action::ActionClass Key;
1315  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1316    Key = Action::AnalyzeJobClass;
1317  else
1318    Key = JA.getKind();
1319
1320  Tool *&T = Tools[Key];
1321  if (!T) {
1322    switch (Key) {
1323    case Action::AssembleJobClass:
1324      T = new tools::auroraux::Assemble(*this); break;
1325    case Action::LinkJobClass:
1326      T = new tools::auroraux::Link(*this); break;
1327    default:
1328      T = &Generic_GCC::SelectTool(C, JA, Inputs);
1329    }
1330  }
1331
1332  return *T;
1333}
1334
1335
1336/// Linux toolchain (very bare-bones at the moment).
1337
1338enum LinuxDistro {
1339  ArchLinux,
1340  DebianLenny,
1341  DebianSqueeze,
1342  DebianWheezy,
1343  Exherbo,
1344  RHEL4,
1345  RHEL5,
1346  RHEL6,
1347  Fedora13,
1348  Fedora14,
1349  Fedora15,
1350  FedoraRawhide,
1351  OpenSuse11_3,
1352  OpenSuse11_4,
1353  OpenSuse12_1,
1354  UbuntuHardy,
1355  UbuntuIntrepid,
1356  UbuntuJaunty,
1357  UbuntuKarmic,
1358  UbuntuLucid,
1359  UbuntuMaverick,
1360  UbuntuNatty,
1361  UbuntuOneiric,
1362  UnknownDistro
1363};
1364
1365static bool IsRedhat(enum LinuxDistro Distro) {
1366  return Distro == Fedora13 || Distro == Fedora14 ||
1367         Distro == Fedora15 || Distro == FedoraRawhide ||
1368         Distro == RHEL4 || Distro == RHEL5 || Distro == RHEL6;
1369}
1370
1371static bool IsOpenSuse(enum LinuxDistro Distro) {
1372  return Distro == OpenSuse11_3 || Distro == OpenSuse11_4 ||
1373         Distro == OpenSuse12_1;
1374}
1375
1376static bool IsDebian(enum LinuxDistro Distro) {
1377  return Distro == DebianLenny || Distro == DebianSqueeze ||
1378         Distro == DebianWheezy;
1379}
1380
1381static bool IsUbuntu(enum LinuxDistro Distro) {
1382  return Distro == UbuntuHardy  || Distro == UbuntuIntrepid ||
1383         Distro == UbuntuLucid  || Distro == UbuntuMaverick ||
1384         Distro == UbuntuJaunty || Distro == UbuntuKarmic ||
1385         Distro == UbuntuNatty  || Distro == UbuntuOneiric;
1386}
1387
1388// FIXME: This should be deleted. We should assume a multilib environment, and
1389// fallback gracefully if any parts of it are absent.
1390static bool HasMultilib(llvm::Triple::ArchType Arch, enum LinuxDistro Distro) {
1391  if (Arch == llvm::Triple::x86_64) {
1392    bool Exists;
1393    if (Distro == Exherbo &&
1394        (llvm::sys::fs::exists("/usr/lib32/libc.so", Exists) || !Exists))
1395      return false;
1396  }
1397
1398  return true;
1399}
1400
1401static LinuxDistro DetectLinuxDistro(llvm::Triple::ArchType Arch) {
1402  llvm::OwningPtr<llvm::MemoryBuffer> File;
1403  if (!llvm::MemoryBuffer::getFile("/etc/lsb-release", File)) {
1404    StringRef Data = File.get()->getBuffer();
1405    SmallVector<StringRef, 8> Lines;
1406    Data.split(Lines, "\n");
1407    for (unsigned int i = 0, s = Lines.size(); i < s; ++ i) {
1408      if (Lines[i] == "DISTRIB_CODENAME=hardy")
1409        return UbuntuHardy;
1410      else if (Lines[i] == "DISTRIB_CODENAME=intrepid")
1411        return UbuntuIntrepid;
1412      else if (Lines[i] == "DISTRIB_CODENAME=jaunty")
1413        return UbuntuJaunty;
1414      else if (Lines[i] == "DISTRIB_CODENAME=karmic")
1415        return UbuntuKarmic;
1416      else if (Lines[i] == "DISTRIB_CODENAME=lucid")
1417        return UbuntuLucid;
1418      else if (Lines[i] == "DISTRIB_CODENAME=maverick")
1419        return UbuntuMaverick;
1420      else if (Lines[i] == "DISTRIB_CODENAME=natty")
1421        return UbuntuNatty;
1422      else if (Lines[i] == "DISTRIB_CODENAME=oneiric")
1423        return UbuntuOneiric;
1424    }
1425    return UnknownDistro;
1426  }
1427
1428  if (!llvm::MemoryBuffer::getFile("/etc/redhat-release", File)) {
1429    StringRef Data = File.get()->getBuffer();
1430    if (Data.startswith("Fedora release 15"))
1431      return Fedora15;
1432    else if (Data.startswith("Fedora release 14"))
1433      return Fedora14;
1434    else if (Data.startswith("Fedora release 13"))
1435      return Fedora13;
1436    else if (Data.startswith("Fedora release") &&
1437             Data.find("Rawhide") != StringRef::npos)
1438      return FedoraRawhide;
1439    else if (Data.startswith("Red Hat Enterprise Linux") &&
1440             Data.find("release 6") != StringRef::npos)
1441      return RHEL6;
1442    else if ((Data.startswith("Red Hat Enterprise Linux") ||
1443	      Data.startswith("CentOS")) &&
1444             Data.find("release 5") != StringRef::npos)
1445      return RHEL5;
1446    else if ((Data.startswith("Red Hat Enterprise Linux") ||
1447	      Data.startswith("CentOS")) &&
1448             Data.find("release 4") != StringRef::npos)
1449      return RHEL4;
1450    return UnknownDistro;
1451  }
1452
1453  if (!llvm::MemoryBuffer::getFile("/etc/debian_version", File)) {
1454    StringRef Data = File.get()->getBuffer();
1455    if (Data[0] == '5')
1456      return DebianLenny;
1457    else if (Data.startswith("squeeze/sid"))
1458      return DebianSqueeze;
1459    else if (Data.startswith("wheezy/sid"))
1460      return DebianWheezy;
1461    return UnknownDistro;
1462  }
1463
1464  if (!llvm::MemoryBuffer::getFile("/etc/SuSE-release", File)) {
1465    StringRef Data = File.get()->getBuffer();
1466    if (Data.startswith("openSUSE 11.3"))
1467      return OpenSuse11_3;
1468    else if (Data.startswith("openSUSE 11.4"))
1469      return OpenSuse11_4;
1470    else if (Data.startswith("openSUSE 12.1"))
1471      return OpenSuse12_1;
1472    return UnknownDistro;
1473  }
1474
1475  bool Exists;
1476  if (!llvm::sys::fs::exists("/etc/exherbo-release", Exists) && Exists)
1477    return Exherbo;
1478
1479  if (!llvm::sys::fs::exists("/etc/arch-release", Exists) && Exists)
1480    return ArchLinux;
1481
1482  return UnknownDistro;
1483}
1484
1485/// \brief Trivial helper function to simplify code checking path existence.
1486static bool PathExists(StringRef Path) {
1487  bool Exists;
1488  if (!llvm::sys::fs::exists(Path, Exists))
1489    return Exists;
1490  return false;
1491}
1492
1493namespace {
1494/// \brief This is a class to find a viable GCC installation for Clang to use.
1495///
1496/// This class tries to find a GCC installation on the system, and report
1497/// information about it. It starts from the host information provided to the
1498/// Driver, and has logic for fuzzing that where appropriate.
1499class GCCInstallationDetector {
1500  /// \brief Struct to store and manipulate GCC versions.
1501  ///
1502  /// We rely on assumptions about the form and structure of GCC version
1503  /// numbers: they consist of at most three '.'-separated components, and each
1504  /// component is a non-negative integer.
1505  struct GCCVersion {
1506    unsigned Major, Minor, Patch;
1507
1508    static GCCVersion Parse(StringRef VersionText) {
1509      const GCCVersion BadVersion = {0, 0, 0};
1510      std::pair<StringRef, StringRef> First = VersionText.split('.');
1511      std::pair<StringRef, StringRef> Second = First.second.split('.');
1512
1513      GCCVersion GoodVersion = {0, 0, 0};
1514      if (First.first.getAsInteger(10, GoodVersion.Major))
1515        return BadVersion;
1516      if (Second.first.getAsInteger(10, GoodVersion.Minor))
1517        return BadVersion;
1518      // We accept a number, or a string for the patch version, in case there
1519      // is a strang suffix, or other mangling: '4.1.x', '4.1.2-rc3'. When it
1520      // isn't a number, we just use '0' as the number but accept it.
1521      if (Second.first.getAsInteger(10, GoodVersion.Patch))
1522        GoodVersion.Patch = 0;
1523      return GoodVersion;
1524    }
1525
1526    bool operator<(const GCCVersion &RHS) const {
1527      if (Major < RHS.Major) return true;
1528      if (Major > RHS.Major) return false;
1529      if (Minor < RHS.Minor) return true;
1530      if (Minor > RHS.Minor) return false;
1531      return Patch < RHS.Patch;
1532    }
1533    bool operator>(const GCCVersion &RHS) const { return RHS < *this; }
1534    bool operator<=(const GCCVersion &RHS) const { return !(*this > RHS); }
1535    bool operator>=(const GCCVersion &RHS) const { return !(*this < RHS); }
1536  };
1537
1538  bool IsValid;
1539  std::string GccTriple;
1540
1541  // FIXME: These might be better as path objects.
1542  std::string GccInstallPath;
1543  std::string GccParentLibPath;
1544
1545  llvm::SmallString<128> CxxIncludeRoot;
1546
1547public:
1548  /// \brief Construct a GCCInstallationDetector from the driver.
1549  ///
1550  /// This performs all of the autodetection and sets up the various paths.
1551  /// Once constructed, a GCCInstallation is esentially immutable.
1552  GCCInstallationDetector(const Driver &D)
1553    : IsValid(false),
1554      GccTriple(D.DefaultHostTriple),
1555      CxxIncludeRoot(CXX_INCLUDE_ROOT) {
1556    // FIXME: Using CXX_INCLUDE_ROOT is here is a bit of a hack, but
1557    // avoids adding yet another option to configure/cmake.
1558    // It would probably be cleaner to break it in two variables
1559    // CXX_GCC_ROOT with just /foo/bar
1560    // CXX_GCC_VER with 4.5.2
1561    // Then we would have
1562    // CXX_INCLUDE_ROOT = CXX_GCC_ROOT/include/c++/CXX_GCC_VER
1563    // and this function would return
1564    // CXX_GCC_ROOT/lib/gcc/CXX_INCLUDE_ARCH/CXX_GCC_VER
1565    if (CxxIncludeRoot != "") {
1566      // This is of the form /foo/bar/include/c++/4.5.2/
1567      if (CxxIncludeRoot.back() == '/')
1568        llvm::sys::path::remove_filename(CxxIncludeRoot); // remove the /
1569      StringRef Version = llvm::sys::path::filename(CxxIncludeRoot);
1570      llvm::sys::path::remove_filename(CxxIncludeRoot); // remove the version
1571      llvm::sys::path::remove_filename(CxxIncludeRoot); // remove the c++
1572      llvm::sys::path::remove_filename(CxxIncludeRoot); // remove the include
1573      GccInstallPath = CxxIncludeRoot.str();
1574      GccInstallPath.append("/lib/gcc/");
1575      GccInstallPath.append(CXX_INCLUDE_ARCH);
1576      GccInstallPath.append("/");
1577      GccInstallPath.append(Version);
1578      GccParentLibPath = GccInstallPath + "/../../..";
1579      IsValid = true;
1580      return;
1581    }
1582
1583    llvm::Triple::ArchType HostArch = llvm::Triple(GccTriple).getArch();
1584    // The library directories which may contain GCC installations.
1585    SmallVector<StringRef, 4> CandidateLibDirs;
1586    // The compatible GCC triples for this particular architecture.
1587    SmallVector<StringRef, 10> CandidateTriples;
1588    CollectLibDirsAndTriples(HostArch, CandidateLibDirs, CandidateTriples);
1589
1590    // Always include the default host triple as the final fallback if no
1591    // specific triple is detected.
1592    CandidateTriples.push_back(D.DefaultHostTriple);
1593
1594    // Compute the set of prefixes for our search.
1595    SmallVector<std::string, 8> Prefixes(D.PrefixDirs.begin(),
1596                                         D.PrefixDirs.end());
1597    Prefixes.push_back(D.SysRoot);
1598    Prefixes.push_back(D.SysRoot + "/usr");
1599    Prefixes.push_back(D.InstalledDir + "/..");
1600
1601    // Loop over the various components which exist and select the best GCC
1602    // installation available. GCC installs are ranked by version number.
1603    GCCVersion BestVersion = {0, 0, 0};
1604    for (unsigned i = 0, ie = Prefixes.size(); i < ie; ++i) {
1605      if (!PathExists(Prefixes[i]))
1606        continue;
1607      for (unsigned j = 0, je = CandidateLibDirs.size(); j < je; ++j) {
1608        const std::string LibDir = Prefixes[i] + CandidateLibDirs[j].str();
1609        if (!PathExists(LibDir))
1610          continue;
1611        for (unsigned k = 0, ke = CandidateTriples.size(); k < ke; ++k)
1612          ScanLibDirForGCCTriple(LibDir, CandidateTriples[k], BestVersion);
1613      }
1614    }
1615  }
1616
1617  /// \brief Check whether we detected a valid GCC install.
1618  bool isValid() const { return IsValid; }
1619
1620  /// \brief Get the GCC triple for the detected install.
1621  const std::string &getTriple() const { return GccTriple; }
1622
1623  /// \brief Get the detected GCC installation path.
1624  const std::string &getInstallPath() const { return GccInstallPath; }
1625
1626  /// \brief Get the detected GCC parent lib path.
1627  const std::string &getParentLibPath() const { return GccParentLibPath; }
1628
1629private:
1630  static void CollectLibDirsAndTriples(llvm::Triple::ArchType HostArch,
1631                                       SmallVectorImpl<StringRef> &LibDirs,
1632                                       SmallVectorImpl<StringRef> &Triples) {
1633    if (HostArch == llvm::Triple::arm || HostArch == llvm::Triple::thumb) {
1634      static const char *const ARMLibDirs[] = { "/lib" };
1635      static const char *const ARMTriples[] = { "arm-linux-gnueabi" };
1636      LibDirs.append(ARMLibDirs, ARMLibDirs + llvm::array_lengthof(ARMLibDirs));
1637      Triples.append(ARMTriples, ARMTriples + llvm::array_lengthof(ARMTriples));
1638    } else if (HostArch == llvm::Triple::x86_64) {
1639      static const char *const X86_64LibDirs[] = { "/lib64", "/lib" };
1640      static const char *const X86_64Triples[] = {
1641        "x86_64-linux-gnu",
1642        "x86_64-unknown-linux-gnu",
1643        "x86_64-pc-linux-gnu",
1644        "x86_64-redhat-linux6E",
1645        "x86_64-redhat-linux",
1646        "x86_64-suse-linux",
1647        "x86_64-manbo-linux-gnu",
1648        "x86_64-linux-gnu",
1649        "x86_64-slackware-linux"
1650      };
1651      LibDirs.append(X86_64LibDirs,
1652                     X86_64LibDirs + llvm::array_lengthof(X86_64LibDirs));
1653      Triples.append(X86_64Triples,
1654                     X86_64Triples + llvm::array_lengthof(X86_64Triples));
1655    } else if (HostArch == llvm::Triple::x86) {
1656      static const char *const X86LibDirs[] = { "/lib32", "/lib" };
1657      static const char *const X86Triples[] = {
1658        "i686-linux-gnu",
1659        "i386-linux-gnu",
1660        "i686-pc-linux-gnu",
1661        "i486-linux-gnu",
1662        "i686-redhat-linux",
1663        "i386-redhat-linux",
1664        "i586-suse-linux",
1665        "i486-slackware-linux"
1666      };
1667      LibDirs.append(X86LibDirs, X86LibDirs + llvm::array_lengthof(X86LibDirs));
1668      Triples.append(X86Triples, X86Triples + llvm::array_lengthof(X86Triples));
1669    } else if (HostArch == llvm::Triple::ppc) {
1670      static const char *const PPCLibDirs[] = { "/lib32", "/lib" };
1671      static const char *const PPCTriples[] = {
1672        "powerpc-linux-gnu",
1673        "powerpc-unknown-linux-gnu"
1674      };
1675      LibDirs.append(PPCLibDirs, PPCLibDirs + llvm::array_lengthof(PPCLibDirs));
1676      Triples.append(PPCTriples, PPCTriples + llvm::array_lengthof(PPCTriples));
1677    } else if (HostArch == llvm::Triple::ppc64) {
1678      static const char *const PPC64LibDirs[] = { "/lib64", "/lib" };
1679      static const char *const PPC64Triples[] = {
1680        "powerpc64-unknown-linux-gnu"
1681      };
1682      LibDirs.append(PPC64LibDirs,
1683                     PPC64LibDirs + llvm::array_lengthof(PPC64LibDirs));
1684      Triples.append(PPC64Triples,
1685                     PPC64Triples + llvm::array_lengthof(PPC64Triples));
1686    }
1687  }
1688
1689  void ScanLibDirForGCCTriple(const std::string &LibDir,
1690                              StringRef CandidateTriple,
1691                              GCCVersion &BestVersion) {
1692    // There are various different suffixes involving the triple we
1693    // check for. We also record what is necessary to walk from each back
1694    // up to the lib directory.
1695    const std::string Suffixes[] = {
1696      "/gcc/" + CandidateTriple.str(),
1697      "/" + CandidateTriple.str() + "/gcc/" + CandidateTriple.str(),
1698
1699      // Ubuntu has a strange mis-matched pair of triples that this happens to
1700      // match.
1701      // FIXME: It may be worthwhile to generalize this and look for a second
1702      // triple.
1703      "/" + CandidateTriple.str() + "/gcc/i686-linux-gnu"
1704    };
1705    const std::string InstallSuffixes[] = {
1706      "/../../..",
1707      "/../../../..",
1708      "/../../../.."
1709    };
1710    // Only look at the final, weird Ubuntu suffix for i386-linux-gnu.
1711    const unsigned NumSuffixes = (llvm::array_lengthof(Suffixes) -
1712                                  (CandidateTriple != "i386-linux-gnu"));
1713    for (unsigned i = 0; i < NumSuffixes; ++i) {
1714      StringRef Suffix = Suffixes[i];
1715      llvm::error_code EC;
1716      for (llvm::sys::fs::directory_iterator LI(LibDir + Suffix, EC), LE;
1717           !EC && LI != LE; LI = LI.increment(EC)) {
1718        StringRef VersionText = llvm::sys::path::filename(LI->path());
1719        GCCVersion CandidateVersion = GCCVersion::Parse(VersionText);
1720        static const GCCVersion MinVersion = { 4, 1, 1 };
1721        if (CandidateVersion < MinVersion)
1722          continue;
1723        if (CandidateVersion <= BestVersion)
1724          continue;
1725        if (!PathExists(LI->path() + "/crtbegin.o"))
1726          continue;
1727
1728        BestVersion = CandidateVersion;
1729        GccTriple = CandidateTriple.str();
1730        // FIXME: We hack together the directory name here instead of
1731        // using LI to ensure stable path separators across Windows and
1732        // Linux.
1733        GccInstallPath = LibDir + Suffixes[i] + "/" + VersionText.str();
1734        GccParentLibPath = GccInstallPath + InstallSuffixes[i];
1735        IsValid = true;
1736      }
1737    }
1738  }
1739};
1740}
1741
1742static void addPathIfExists(const std::string &Path,
1743                            ToolChain::path_list &Paths) {
1744  if (PathExists(Path)) Paths.push_back(Path);
1745}
1746
1747Linux::Linux(const HostInfo &Host, const llvm::Triple &Triple)
1748  : Generic_ELF(Host, Triple) {
1749  llvm::Triple::ArchType Arch =
1750    llvm::Triple(getDriver().DefaultHostTriple).getArch();
1751  const std::string &SysRoot = getDriver().SysRoot;
1752  GCCInstallationDetector GCCInstallation(getDriver());
1753
1754  // OpenSuse stores the linker with the compiler, add that to the search
1755  // path.
1756  ToolChain::path_list &PPaths = getProgramPaths();
1757  PPaths.push_back(GCCInstallation.getParentLibPath() + "/../" +
1758                   GCCInstallation.getTriple() + "/bin");
1759
1760  Linker = GetProgramPath("ld");
1761
1762  LinuxDistro Distro = DetectLinuxDistro(Arch);
1763
1764  if (IsOpenSuse(Distro) || IsUbuntu(Distro)) {
1765    ExtraOpts.push_back("-z");
1766    ExtraOpts.push_back("relro");
1767  }
1768
1769  if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
1770    ExtraOpts.push_back("-X");
1771
1772  if (IsRedhat(Distro) || IsOpenSuse(Distro) || Distro == UbuntuMaverick ||
1773      Distro == UbuntuNatty || Distro == UbuntuOneiric)
1774    ExtraOpts.push_back("--hash-style=gnu");
1775
1776  if (IsDebian(Distro) || IsOpenSuse(Distro) || Distro == UbuntuLucid ||
1777      Distro == UbuntuJaunty || Distro == UbuntuKarmic)
1778    ExtraOpts.push_back("--hash-style=both");
1779
1780  if (IsRedhat(Distro))
1781    ExtraOpts.push_back("--no-add-needed");
1782
1783  if (Distro == DebianSqueeze || Distro == DebianWheezy ||
1784      IsOpenSuse(Distro) ||
1785      (IsRedhat(Distro) && Distro != RHEL4 && Distro != RHEL5) ||
1786      Distro == UbuntuLucid ||
1787      Distro == UbuntuMaverick || Distro == UbuntuKarmic ||
1788      Distro == UbuntuNatty || Distro == UbuntuOneiric)
1789    ExtraOpts.push_back("--build-id");
1790
1791  if (IsOpenSuse(Distro))
1792    ExtraOpts.push_back("--enable-new-dtags");
1793
1794  // The selection of paths to try here is designed to match the patterns which
1795  // the GCC driver itself uses, as this is part of the GCC-compatible driver.
1796  // This was determined by running GCC in a fake filesystem, creating all
1797  // possible permutations of these directories, and seeing which ones it added
1798  // to the link paths.
1799  path_list &Paths = getFilePaths();
1800  const bool Is32Bits = (getArch() == llvm::Triple::x86 ||
1801                         getArch() == llvm::Triple::ppc);
1802
1803  const std::string Suffix32 = Arch == llvm::Triple::x86_64 ? "/32" : "";
1804  const std::string Suffix64 = Arch == llvm::Triple::x86_64 ? "" : "/64";
1805  const std::string Suffix = Is32Bits ? Suffix32 : Suffix64;
1806  const std::string Multilib = Is32Bits ? "lib32" : "lib64";
1807
1808  // FIXME: Because we add paths only when they exist on the system, I think we
1809  // should remove the concept of 'HasMultilib'. It's more likely to break the
1810  // behavior than to preserve any useful invariant on the system.
1811  if (HasMultilib(Arch, Distro)) {
1812    // Add the multilib suffixed paths.
1813    if (GCCInstallation.isValid()) {
1814      const std::string &LibPath = GCCInstallation.getParentLibPath();
1815      const std::string &GccTriple = GCCInstallation.getTriple();
1816      // FIXME: This OpenSuse-specific path shouldn't be needed any more, but
1817      // I don't want to remove it without finding someone to test.
1818      if (IsOpenSuse(Distro) && Is32Bits)
1819        Paths.push_back(LibPath + "/../" + GccTriple + "/lib/../lib");
1820
1821      addPathIfExists(GCCInstallation.getInstallPath() + Suffix, Paths);
1822      addPathIfExists(LibPath + "/../" + GccTriple + "/lib/../" + Multilib,
1823                      Paths);
1824      addPathIfExists(LibPath + "/../" + Multilib, Paths);
1825    }
1826    addPathIfExists(SysRoot + "/lib/../" + Multilib, Paths);
1827    addPathIfExists(SysRoot + "/usr/lib/../" + Multilib, Paths);
1828
1829    // Try walking via the GCC triple path in case of multiarch GCC
1830    // installations with strange symlinks.
1831    if (GCCInstallation.isValid())
1832      addPathIfExists(SysRoot + "/usr/lib/" + GCCInstallation.getTriple() +
1833                      "/../../" + Multilib, Paths);
1834  }
1835
1836  // Add the non-multilib suffixed paths (if potentially different).
1837  if (GCCInstallation.isValid()) {
1838    const std::string &LibPath = GCCInstallation.getParentLibPath();
1839    const std::string &GccTriple = GCCInstallation.getTriple();
1840    if (!Suffix.empty() || !HasMultilib(Arch, Distro))
1841      addPathIfExists(GCCInstallation.getInstallPath(), Paths);
1842    addPathIfExists(LibPath + "/../" + GccTriple + "/lib", Paths);
1843    addPathIfExists(LibPath, Paths);
1844  }
1845  addPathIfExists(SysRoot + "/lib", Paths);
1846  addPathIfExists(SysRoot + "/usr/lib", Paths);
1847
1848  // Add a multiarch lib directory whenever it exists and is plausible.
1849  if (GCCInstallation.isValid() && Arch == getArch())
1850    addPathIfExists(SysRoot + "/usr/lib/" + GCCInstallation.getTriple(), Paths);
1851}
1852
1853bool Linux::HasNativeLLVMSupport() const {
1854  return true;
1855}
1856
1857Tool &Linux::SelectTool(const Compilation &C, const JobAction &JA,
1858                        const ActionList &Inputs) const {
1859  Action::ActionClass Key;
1860  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1861    Key = Action::AnalyzeJobClass;
1862  else
1863    Key = JA.getKind();
1864
1865  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
1866                                             options::OPT_no_integrated_as,
1867                                             IsIntegratedAssemblerDefault());
1868
1869  Tool *&T = Tools[Key];
1870  if (!T) {
1871    switch (Key) {
1872    case Action::AssembleJobClass:
1873      if (UseIntegratedAs)
1874        T = new tools::ClangAs(*this);
1875      else
1876        T = new tools::linuxtools::Assemble(*this);
1877      break;
1878    case Action::LinkJobClass:
1879      T = new tools::linuxtools::Link(*this); break;
1880    default:
1881      T = &Generic_GCC::SelectTool(C, JA, Inputs);
1882    }
1883  }
1884
1885  return *T;
1886}
1887
1888/// DragonFly - DragonFly tool chain which can call as(1) and ld(1) directly.
1889
1890DragonFly::DragonFly(const HostInfo &Host, const llvm::Triple& Triple)
1891  : Generic_ELF(Host, Triple) {
1892
1893  // Path mangling to find libexec
1894  getProgramPaths().push_back(getDriver().getInstalledDir());
1895  if (getDriver().getInstalledDir() != getDriver().Dir)
1896    getProgramPaths().push_back(getDriver().Dir);
1897
1898  getFilePaths().push_back(getDriver().Dir + "/../lib");
1899  getFilePaths().push_back("/usr/lib");
1900  getFilePaths().push_back("/usr/lib/gcc41");
1901}
1902
1903Tool &DragonFly::SelectTool(const Compilation &C, const JobAction &JA,
1904                            const ActionList &Inputs) const {
1905  Action::ActionClass Key;
1906  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1907    Key = Action::AnalyzeJobClass;
1908  else
1909    Key = JA.getKind();
1910
1911  Tool *&T = Tools[Key];
1912  if (!T) {
1913    switch (Key) {
1914    case Action::AssembleJobClass:
1915      T = new tools::dragonfly::Assemble(*this); break;
1916    case Action::LinkJobClass:
1917      T = new tools::dragonfly::Link(*this); break;
1918    default:
1919      T = &Generic_GCC::SelectTool(C, JA, Inputs);
1920    }
1921  }
1922
1923  return *T;
1924}
1925
1926Windows::Windows(const HostInfo &Host, const llvm::Triple& Triple)
1927  : ToolChain(Host, Triple) {
1928}
1929
1930Tool &Windows::SelectTool(const Compilation &C, const JobAction &JA,
1931                          const ActionList &Inputs) const {
1932  Action::ActionClass Key;
1933  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1934    Key = Action::AnalyzeJobClass;
1935  else
1936    Key = JA.getKind();
1937
1938  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
1939                                             options::OPT_no_integrated_as,
1940                                             IsIntegratedAssemblerDefault());
1941
1942  Tool *&T = Tools[Key];
1943  if (!T) {
1944    switch (Key) {
1945    case Action::InputClass:
1946    case Action::BindArchClass:
1947    case Action::LipoJobClass:
1948    case Action::DsymutilJobClass:
1949    case Action::VerifyJobClass:
1950      llvm_unreachable("Invalid tool kind.");
1951    case Action::PreprocessJobClass:
1952    case Action::PrecompileJobClass:
1953    case Action::AnalyzeJobClass:
1954    case Action::CompileJobClass:
1955      T = new tools::Clang(*this); break;
1956    case Action::AssembleJobClass:
1957      if (!UseIntegratedAs && getTriple().getEnvironment() == llvm::Triple::MachO)
1958        T = new tools::darwin::Assemble(*this);
1959      else
1960        T = new tools::ClangAs(*this);
1961      break;
1962    case Action::LinkJobClass:
1963      T = new tools::visualstudio::Link(*this); break;
1964    }
1965  }
1966
1967  return *T;
1968}
1969
1970bool Windows::IsIntegratedAssemblerDefault() const {
1971  return true;
1972}
1973
1974bool Windows::IsUnwindTablesDefault() const {
1975  // FIXME: Gross; we should probably have some separate target
1976  // definition, possibly even reusing the one in clang.
1977  return getArchName() == "x86_64";
1978}
1979
1980const char *Windows::GetDefaultRelocationModel() const {
1981  return "static";
1982}
1983
1984const char *Windows::GetForcedPicModel() const {
1985  if (getArchName() == "x86_64")
1986    return "pic";
1987  return 0;
1988}
1989