ToolChains.cpp revision fe3a7ea7f2132ec5cd0510cc21d2677614a6ab3a 
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#include "clang/Driver/Arg.h"
13#include "clang/Driver/ArgList.h"
14#include "clang/Driver/Compilation.h"
15#include "clang/Driver/Driver.h"
16#include "clang/Driver/DriverDiagnostic.h"
17#include "clang/Driver/HostInfo.h"
18#include "clang/Driver/OptTable.h"
19#include "clang/Driver/Option.h"
20#include "clang/Driver/Options.h"
21#include "clang/Basic/Version.h"
22
23#include "llvm/ADT/SmallString.h"
24#include "llvm/ADT/StringExtras.h"
25#include "llvm/Support/ErrorHandling.h"
26#include "llvm/Support/MemoryBuffer.h"
27#include "llvm/Support/raw_ostream.h"
28#include "llvm/System/Path.h"
29
30#include <cstdlib> // ::getenv
31
32using namespace clang::driver;
33using namespace clang::driver::toolchains;
34
35/// Darwin - Darwin tool chain for i386 and x86_64.
36
37Darwin::Darwin(const HostInfo &Host, const llvm::Triple& Triple)
38  : ToolChain(Host, Triple), TargetInitialized(false)
39{
40  // Compute the initial Darwin version based on the host.
41  bool HadExtra;
42  std::string OSName = Triple.getOSName();
43  if (!Driver::GetReleaseVersion(&OSName[6],
44                                 DarwinVersion[0], DarwinVersion[1],
45                                 DarwinVersion[2], HadExtra))
46    getDriver().Diag(clang::diag::err_drv_invalid_darwin_version) << OSName;
47
48  llvm::raw_string_ostream(MacosxVersionMin)
49    << "10." << std::max(0, (int)DarwinVersion[0] - 4) << '.'
50    << DarwinVersion[1];
51}
52
53types::ID Darwin::LookupTypeForExtension(const char *Ext) const {
54  types::ID Ty = types::lookupTypeForExtension(Ext);
55
56  // Darwin always preprocesses assembly files (unless -x is used explicitly).
57  if (Ty == types::TY_PP_Asm)
58    return types::TY_Asm;
59
60  return Ty;
61}
62
63bool Darwin::HasNativeLLVMSupport() const {
64  return true;
65}
66
67// FIXME: Can we tablegen this?
68static const char *GetArmArchForMArch(llvm::StringRef Value) {
69  if (Value == "armv6k")
70    return "armv6";
71
72  if (Value == "armv5tej")
73    return "armv5";
74
75  if (Value == "xscale")
76    return "xscale";
77
78  if (Value == "armv4t")
79    return "armv4t";
80
81  if (Value == "armv7" || Value == "armv7-a" || Value == "armv7-r" ||
82      Value == "armv7-m" || Value == "armv7a" || Value == "armv7r" ||
83      Value == "armv7m")
84    return "armv7";
85
86  return 0;
87}
88
89// FIXME: Can we tablegen this?
90static const char *GetArmArchForMCpu(llvm::StringRef Value) {
91  if (Value == "arm10tdmi" || Value == "arm1020t" || Value == "arm9e" ||
92      Value == "arm946e-s" || Value == "arm966e-s" ||
93      Value == "arm968e-s" || Value == "arm10e" ||
94      Value == "arm1020e" || Value == "arm1022e" || Value == "arm926ej-s" ||
95      Value == "arm1026ej-s")
96    return "armv5";
97
98  if (Value == "xscale")
99    return "xscale";
100
101  if (Value == "arm1136j-s" || Value == "arm1136jf-s" ||
102      Value == "arm1176jz-s" || Value == "arm1176jzf-s")
103    return "armv6";
104
105  if (Value == "cortex-a8" || Value == "cortex-r4" || Value == "cortex-m3")
106    return "armv7";
107
108  return 0;
109}
110
111llvm::StringRef Darwin::getDarwinArchName(const ArgList &Args) const {
112  switch (getTriple().getArch()) {
113  default:
114    return getArchName();
115
116  case llvm::Triple::arm: {
117    if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
118      if (const char *Arch = GetArmArchForMArch(A->getValue(Args)))
119        return Arch;
120
121    if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
122      if (const char *Arch = GetArmArchForMCpu(A->getValue(Args)))
123        return Arch;
124
125    return "arm";
126  }
127  }
128}
129
130DarwinGCC::DarwinGCC(const HostInfo &Host, const llvm::Triple& Triple)
131  : Darwin(Host, Triple)
132{
133  // We can only work with 4.2.1 currently.
134  GCCVersion[0] = 4;
135  GCCVersion[1] = 2;
136  GCCVersion[2] = 1;
137
138  // Set up the tool chain paths to match gcc.
139  ToolChainDir = "i686-apple-darwin";
140  ToolChainDir += llvm::utostr(DarwinVersion[0]);
141  ToolChainDir += "/";
142  ToolChainDir += llvm::utostr(GCCVersion[0]);
143  ToolChainDir += '.';
144  ToolChainDir += llvm::utostr(GCCVersion[1]);
145  ToolChainDir += '.';
146  ToolChainDir += llvm::utostr(GCCVersion[2]);
147
148  // Try the next major version if that tool chain dir is invalid.
149  std::string Tmp = "/usr/lib/gcc/" + ToolChainDir;
150  if (!llvm::sys::Path(Tmp).exists()) {
151    std::string Next = "i686-apple-darwin";
152    Next += llvm::utostr(DarwinVersion[0] + 1);
153    Next += "/";
154    Next += llvm::utostr(GCCVersion[0]);
155    Next += '.';
156    Next += llvm::utostr(GCCVersion[1]);
157    Next += '.';
158    Next += llvm::utostr(GCCVersion[2]);
159
160    // Use that if it exists, otherwise hope the user isn't linking.
161    //
162    // FIXME: Drop dependency on gcc's tool chain.
163    Tmp = "/usr/lib/gcc/" + Next;
164    if (llvm::sys::Path(Tmp).exists())
165      ToolChainDir = Next;
166  }
167
168  std::string Path;
169  if (getArchName() == "x86_64") {
170    Path = getDriver().Dir;
171    Path += "/../lib/gcc/";
172    Path += ToolChainDir;
173    Path += "/x86_64";
174    getFilePaths().push_back(Path);
175
176    Path = "/usr/lib/gcc/";
177    Path += ToolChainDir;
178    Path += "/x86_64";
179    getFilePaths().push_back(Path);
180  }
181
182  Path = getDriver().Dir;
183  Path += "/../lib/gcc/";
184  Path += ToolChainDir;
185  getFilePaths().push_back(Path);
186
187  Path = "/usr/lib/gcc/";
188  Path += ToolChainDir;
189  getFilePaths().push_back(Path);
190
191  Path = getDriver().Dir;
192  Path += "/../libexec/gcc/";
193  Path += ToolChainDir;
194  getProgramPaths().push_back(Path);
195
196  Path = "/usr/libexec/gcc/";
197  Path += ToolChainDir;
198  getProgramPaths().push_back(Path);
199
200  getProgramPaths().push_back(getDriver().getInstalledDir());
201  if (getDriver().getInstalledDir() != getDriver().Dir)
202    getProgramPaths().push_back(getDriver().Dir);
203}
204
205Darwin::~Darwin() {
206  // Free tool implementations.
207  for (llvm::DenseMap<unsigned, Tool*>::iterator
208         it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
209    delete it->second;
210}
211
212std::string Darwin::ComputeEffectiveClangTriple(const ArgList &Args) const {
213  llvm::Triple Triple(ComputeLLVMTriple(Args));
214
215  // If the target isn't initialized (e.g., an unknown Darwin platform, return
216  // the default triple).
217  if (!isTargetInitialized())
218    return Triple.getTriple();
219
220  unsigned Version[3];
221  getTargetVersion(Version);
222
223  // Mangle the target version into the OS triple component.  For historical
224  // reasons that make little sense, the version passed here is the "darwin"
225  // version, which drops the 10 and offsets by 4. See inverse code when
226  // setting the OS version preprocessor define.
227  if (!isTargetIPhoneOS()) {
228    Version[0] = Version[1] + 4;
229    Version[1] = Version[2];
230    Version[2] = 0;
231  } else {
232    // Use the environment to communicate that we are targetting iPhoneOS.
233    Triple.setEnvironmentName("iphoneos");
234  }
235
236  llvm::SmallString<16> Str;
237  llvm::raw_svector_ostream(Str) << "darwin" << Version[0]
238                                 << "." << Version[1] << "." << Version[2];
239  Triple.setOSName(Str.str());
240
241  return Triple.getTriple();
242}
243
244Tool &Darwin::SelectTool(const Compilation &C, const JobAction &JA) const {
245  Action::ActionClass Key;
246  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
247    Key = Action::AnalyzeJobClass;
248  else
249    Key = JA.getKind();
250
251  // FIXME: This doesn't belong here, but ideally we will support static soon
252  // anyway.
253  bool HasStatic = (C.getArgs().hasArg(options::OPT_mkernel) ||
254                    C.getArgs().hasArg(options::OPT_static) ||
255                    C.getArgs().hasArg(options::OPT_fapple_kext));
256  bool IsIADefault = IsIntegratedAssemblerDefault() && !HasStatic;
257  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
258                                             options::OPT_no_integrated_as,
259                                             IsIADefault);
260
261  Tool *&T = Tools[Key];
262  if (!T) {
263    switch (Key) {
264    case Action::InputClass:
265    case Action::BindArchClass:
266      assert(0 && "Invalid tool kind.");
267    case Action::PreprocessJobClass:
268      T = new tools::darwin::Preprocess(*this); break;
269    case Action::AnalyzeJobClass:
270      T = new tools::Clang(*this); break;
271    case Action::PrecompileJobClass:
272    case Action::CompileJobClass:
273      T = new tools::darwin::Compile(*this); break;
274    case Action::AssembleJobClass: {
275      if (UseIntegratedAs)
276        T = new tools::ClangAs(*this);
277      else
278        T = new tools::darwin::Assemble(*this);
279      break;
280    }
281    case Action::LinkJobClass:
282      T = new tools::darwin::Link(*this); break;
283    case Action::LipoJobClass:
284      T = new tools::darwin::Lipo(*this); break;
285    case Action::DsymutilJobClass:
286      T = new tools::darwin::Dsymutil(*this); break;
287    }
288  }
289
290  return *T;
291}
292
293void DarwinGCC::AddLinkSearchPathArgs(const ArgList &Args,
294                                      ArgStringList &CmdArgs) const {
295  std::string Tmp;
296
297  // FIXME: Derive these correctly.
298  if (getArchName() == "x86_64") {
299    CmdArgs.push_back(Args.MakeArgString("-L/usr/lib/gcc/" + ToolChainDir +
300                                         "/x86_64"));
301    // Intentionally duplicated for (temporary) gcc bug compatibility.
302    CmdArgs.push_back(Args.MakeArgString("-L/usr/lib/gcc/" + ToolChainDir +
303                                         "/x86_64"));
304  }
305
306  CmdArgs.push_back(Args.MakeArgString("-L/usr/lib/" + ToolChainDir));
307
308  Tmp = getDriver().Dir + "/../lib/gcc/" + ToolChainDir;
309  if (llvm::sys::Path(Tmp).exists())
310    CmdArgs.push_back(Args.MakeArgString("-L" + Tmp));
311  Tmp = getDriver().Dir + "/../lib/gcc";
312  if (llvm::sys::Path(Tmp).exists())
313    CmdArgs.push_back(Args.MakeArgString("-L" + Tmp));
314  CmdArgs.push_back(Args.MakeArgString("-L/usr/lib/gcc/" + ToolChainDir));
315  // Intentionally duplicated for (temporary) gcc bug compatibility.
316  CmdArgs.push_back(Args.MakeArgString("-L/usr/lib/gcc/" + ToolChainDir));
317  Tmp = getDriver().Dir + "/../lib/" + ToolChainDir;
318  if (llvm::sys::Path(Tmp).exists())
319    CmdArgs.push_back(Args.MakeArgString("-L" + Tmp));
320  Tmp = getDriver().Dir + "/../lib";
321  if (llvm::sys::Path(Tmp).exists())
322    CmdArgs.push_back(Args.MakeArgString("-L" + Tmp));
323  CmdArgs.push_back(Args.MakeArgString("-L/usr/lib/gcc/" + ToolChainDir +
324                                       "/../../../" + ToolChainDir));
325  CmdArgs.push_back(Args.MakeArgString("-L/usr/lib/gcc/" + ToolChainDir +
326                                       "/../../.."));
327}
328
329void DarwinGCC::AddLinkRuntimeLibArgs(const ArgList &Args,
330                                      ArgStringList &CmdArgs) const {
331  // Note that this routine is only used for targetting OS X.
332
333  // Derived from libgcc and lib specs but refactored.
334  if (Args.hasArg(options::OPT_static)) {
335    CmdArgs.push_back("-lgcc_static");
336  } else {
337    if (Args.hasArg(options::OPT_static_libgcc)) {
338      CmdArgs.push_back("-lgcc_eh");
339    } else if (Args.hasArg(options::OPT_miphoneos_version_min_EQ)) {
340      // Derived from darwin_iphoneos_libgcc spec.
341      if (isTargetIPhoneOS()) {
342        CmdArgs.push_back("-lgcc_s.1");
343      } else {
344        CmdArgs.push_back("-lgcc_s.10.5");
345      }
346    } else if (Args.hasArg(options::OPT_shared_libgcc) ||
347               Args.hasFlag(options::OPT_fexceptions,
348                            options::OPT_fno_exceptions) ||
349               Args.hasArg(options::OPT_fgnu_runtime)) {
350      // FIXME: This is probably broken on 10.3?
351      if (isMacosxVersionLT(10, 5))
352        CmdArgs.push_back("-lgcc_s.10.4");
353      else if (isMacosxVersionLT(10, 6))
354        CmdArgs.push_back("-lgcc_s.10.5");
355    } else {
356      if (isMacosxVersionLT(10, 3, 9))
357        ; // Do nothing.
358      else if (isMacosxVersionLT(10, 5))
359        CmdArgs.push_back("-lgcc_s.10.4");
360      else if (isMacosxVersionLT(10, 6))
361        CmdArgs.push_back("-lgcc_s.10.5");
362    }
363
364    if (isTargetIPhoneOS() || isMacosxVersionLT(10, 6)) {
365      CmdArgs.push_back("-lgcc");
366      CmdArgs.push_back("-lSystem");
367    } else {
368      CmdArgs.push_back("-lSystem");
369      CmdArgs.push_back("-lgcc");
370    }
371  }
372}
373
374DarwinClang::DarwinClang(const HostInfo &Host, const llvm::Triple& Triple)
375  : Darwin(Host, Triple)
376{
377  getProgramPaths().push_back(getDriver().getInstalledDir());
378  if (getDriver().getInstalledDir() != getDriver().Dir)
379    getProgramPaths().push_back(getDriver().Dir);
380
381  // We expect 'as', 'ld', etc. to be adjacent to our install dir.
382  getProgramPaths().push_back(getDriver().getInstalledDir());
383  if (getDriver().getInstalledDir() != getDriver().Dir)
384    getProgramPaths().push_back(getDriver().Dir);
385
386  // For fallback, we need to know how to find the GCC cc1 executables, so we
387  // also add the GCC libexec paths. This is legiy code that can be removed once
388  // fallback is no longer useful.
389  std::string ToolChainDir = "i686-apple-darwin";
390  ToolChainDir += llvm::utostr(DarwinVersion[0]);
391  ToolChainDir += "/4.2.1";
392
393  std::string Path = getDriver().Dir;
394  Path += "/../libexec/gcc/";
395  Path += ToolChainDir;
396  getProgramPaths().push_back(Path);
397
398  Path = "/usr/libexec/gcc/";
399  Path += ToolChainDir;
400  getProgramPaths().push_back(Path);
401}
402
403void DarwinClang::AddLinkSearchPathArgs(const ArgList &Args,
404                                       ArgStringList &CmdArgs) const {
405  // The Clang toolchain uses explicit paths for internal libraries.
406
407  // Unfortunately, we still might depend on a few of the libraries that are
408  // only available in the gcc library directory (in particular
409  // libstdc++.dylib). For now, hardcode the path to the known install location.
410  llvm::sys::Path P(getDriver().Dir);
411  P.eraseComponent(); // .../usr/bin -> ../usr
412  P.appendComponent("lib");
413  P.appendComponent("gcc");
414  switch (getTriple().getArch()) {
415  default:
416    assert(0 && "Invalid Darwin arch!");
417  case llvm::Triple::x86:
418  case llvm::Triple::x86_64:
419    P.appendComponent("i686-apple-darwin10");
420    break;
421  case llvm::Triple::arm:
422  case llvm::Triple::thumb:
423    P.appendComponent("arm-apple-darwin10");
424    break;
425  case llvm::Triple::ppc:
426  case llvm::Triple::ppc64:
427    P.appendComponent("powerpc-apple-darwin10");
428    break;
429  }
430  P.appendComponent("4.2.1");
431
432  // Determine the arch specific GCC subdirectory.
433  const char *ArchSpecificDir = 0;
434  switch (getTriple().getArch()) {
435  default:
436    break;
437  case llvm::Triple::arm:
438  case llvm::Triple::thumb: {
439    std::string Triple = ComputeLLVMTriple(Args);
440    llvm::StringRef TripleStr = Triple;
441    if (TripleStr.startswith("armv5") || TripleStr.startswith("thumbv5"))
442      ArchSpecificDir = "v5";
443    else if (TripleStr.startswith("armv6") || TripleStr.startswith("thumbv6"))
444      ArchSpecificDir = "v6";
445    else if (TripleStr.startswith("armv7") || TripleStr.startswith("thumbv7"))
446      ArchSpecificDir = "v7";
447    break;
448  }
449  case llvm::Triple::ppc64:
450    ArchSpecificDir = "ppc64";
451    break;
452  case llvm::Triple::x86_64:
453    ArchSpecificDir = "x86_64";
454    break;
455  }
456
457  if (ArchSpecificDir) {
458    P.appendComponent(ArchSpecificDir);
459    if (P.exists())
460      CmdArgs.push_back(Args.MakeArgString("-L" + P.str()));
461    P.eraseComponent();
462  }
463
464  if (P.exists())
465    CmdArgs.push_back(Args.MakeArgString("-L" + P.str()));
466}
467
468void DarwinClang::AddLinkRuntimeLibArgs(const ArgList &Args,
469                                        ArgStringList &CmdArgs) const {
470  // Darwin doesn't support real static executables, don't link any runtime
471  // libraries with -static.
472  if (Args.hasArg(options::OPT_static))
473    return;
474
475  // Reject -static-libgcc for now, we can deal with this when and if someone
476  // cares. This is useful in situations where someone wants to statically link
477  // something like libstdc++, and needs its runtime support routines.
478  if (const Arg *A = Args.getLastArg(options::OPT_static_libgcc)) {
479    getDriver().Diag(clang::diag::err_drv_unsupported_opt)
480      << A->getAsString(Args);
481    return;
482  }
483
484  // Otherwise link libSystem, then the dynamic runtime library, and finally any
485  // target specific static runtime library.
486  CmdArgs.push_back("-lSystem");
487
488  // Select the dynamic runtime library and the target specific static library.
489  const char *DarwinStaticLib = 0;
490  if (isTargetIPhoneOS()) {
491    CmdArgs.push_back("-lgcc_s.1");
492
493    // We may need some static functions for armv6/thumb which are required to
494    // be in the same linkage unit as their caller.
495    if (getDarwinArchName(Args) == "armv6")
496      DarwinStaticLib = "libclang_rt.armv6.a";
497  } else {
498    // The dynamic runtime library was merged with libSystem for 10.6 and
499    // beyond; only 10.4 and 10.5 need an additional runtime library.
500    if (isMacosxVersionLT(10, 5))
501      CmdArgs.push_back("-lgcc_s.10.4");
502    else if (isMacosxVersionLT(10, 6))
503      CmdArgs.push_back("-lgcc_s.10.5");
504
505    // For OS X, we thought we would only need a static runtime library when
506    // targetting 10.4, to provide versions of the static functions which were
507    // omitted from 10.4.dylib.
508    //
509    // Unfortunately, that turned out to not be true, because Darwin system
510    // headers can still use eprintf on i386, and it is not exported from
511    // libSystem. Therefore, we still must provide a runtime library just for
512    // the tiny tiny handful of projects that *might* use that symbol.
513    if (isMacosxVersionLT(10, 5)) {
514      DarwinStaticLib = "libclang_rt.10.4.a";
515    } else {
516      if (getTriple().getArch() == llvm::Triple::x86)
517        DarwinStaticLib = "libclang_rt.eprintf.a";
518    }
519  }
520
521  /// Add the target specific static library, if needed.
522  if (DarwinStaticLib) {
523    llvm::sys::Path P(getDriver().ResourceDir);
524    P.appendComponent("lib");
525    P.appendComponent("darwin");
526    P.appendComponent(DarwinStaticLib);
527
528    // For now, allow missing resource libraries to support developers who may
529    // not have compiler-rt checked out or integrated into their build.
530    if (P.exists())
531      CmdArgs.push_back(Args.MakeArgString(P.str()));
532  }
533}
534
535void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
536  const OptTable &Opts = getDriver().getOpts();
537
538  Arg *OSXVersion = Args.getLastArg(options::OPT_mmacosx_version_min_EQ);
539  Arg *iPhoneVersion = Args.getLastArg(options::OPT_miphoneos_version_min_EQ);
540  if (OSXVersion && iPhoneVersion) {
541    getDriver().Diag(clang::diag::err_drv_argument_not_allowed_with)
542          << OSXVersion->getAsString(Args)
543          << iPhoneVersion->getAsString(Args);
544    iPhoneVersion = 0;
545  } else if (!OSXVersion && !iPhoneVersion) {
546    // If neither OS X nor iPhoneOS targets were specified, check for
547    // environment defines.
548    const char *OSXTarget = ::getenv("MACOSX_DEPLOYMENT_TARGET");
549    const char *iPhoneOSTarget = ::getenv("IPHONEOS_DEPLOYMENT_TARGET");
550
551    // Ignore empty strings.
552    if (OSXTarget && OSXTarget[0] == '\0')
553      OSXTarget = 0;
554    if (iPhoneOSTarget && iPhoneOSTarget[0] == '\0')
555      iPhoneOSTarget = 0;
556
557    // Diagnose conflicting deployment targets, and choose default platform
558    // based on the tool chain.
559    //
560    // FIXME: Don't hardcode default here.
561    if (OSXTarget && iPhoneOSTarget) {
562      // FIXME: We should see if we can get away with warning or erroring on
563      // this. Perhaps put under -pedantic?
564      if (getTriple().getArch() == llvm::Triple::arm ||
565          getTriple().getArch() == llvm::Triple::thumb)
566        OSXTarget = 0;
567      else
568        iPhoneOSTarget = 0;
569    }
570
571    if (OSXTarget) {
572      const Option *O = Opts.getOption(options::OPT_mmacosx_version_min_EQ);
573      OSXVersion = Args.MakeJoinedArg(0, O, OSXTarget);
574      Args.append(OSXVersion);
575    } else if (iPhoneOSTarget) {
576      const Option *O = Opts.getOption(options::OPT_miphoneos_version_min_EQ);
577      iPhoneVersion = Args.MakeJoinedArg(0, O, iPhoneOSTarget);
578      Args.append(iPhoneVersion);
579    } else {
580      // Otherwise, assume we are targeting OS X.
581      const Option *O = Opts.getOption(options::OPT_mmacosx_version_min_EQ);
582      OSXVersion = Args.MakeJoinedArg(0, O, MacosxVersionMin);
583      Args.append(OSXVersion);
584    }
585  }
586
587  // Set the tool chain target information.
588  unsigned Major, Minor, Micro;
589  bool HadExtra;
590  if (OSXVersion) {
591    assert(!iPhoneVersion && "Unknown target platform!");
592    if (!Driver::GetReleaseVersion(OSXVersion->getValue(Args), Major, Minor,
593                                   Micro, HadExtra) || HadExtra ||
594        Major != 10 || Minor >= 10 || Micro >= 10)
595      getDriver().Diag(clang::diag::err_drv_invalid_version_number)
596        << OSXVersion->getAsString(Args);
597  } else {
598    assert(iPhoneVersion && "Unknown target platform!");
599    if (!Driver::GetReleaseVersion(iPhoneVersion->getValue(Args), Major, Minor,
600                                   Micro, HadExtra) || HadExtra ||
601        Major >= 10 || Minor >= 100 || Micro >= 100)
602      getDriver().Diag(clang::diag::err_drv_invalid_version_number)
603        << iPhoneVersion->getAsString(Args);
604  }
605  setTarget(iPhoneVersion, Major, Minor, Micro);
606}
607
608void DarwinClang::AddCXXStdlibLibArgs(const ArgList &Args,
609                                      ArgStringList &CmdArgs) const {
610  CXXStdlibType Type = GetCXXStdlibType(Args);
611
612  switch (Type) {
613  case ToolChain::CST_Libcxx:
614    CmdArgs.push_back("-lc++");
615    break;
616
617  case ToolChain::CST_Libstdcxx: {
618    // Unfortunately, -lstdc++ doesn't always exist in the standard search path;
619    // it was previously found in the gcc lib dir. However, for all the Darwin
620    // platforms we care about it was -lstdc++.6, so we search for that
621    // explicitly if we can't see an obvious -lstdc++ candidate.
622
623    // Check in the sysroot first.
624    if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) {
625      llvm::sys::Path P(A->getValue(Args));
626      P.appendComponent("usr");
627      P.appendComponent("lib");
628      P.appendComponent("libstdc++.dylib");
629
630      if (!P.exists()) {
631        P.eraseComponent();
632        P.appendComponent("libstdc++.6.dylib");
633        if (P.exists()) {
634          CmdArgs.push_back(Args.MakeArgString(P.str()));
635          return;
636        }
637      }
638    }
639
640    // Otherwise, look in the root.
641    if (!llvm::sys::Path("/usr/lib/libstdc++.dylib").exists() &&
642        llvm::sys::Path("/usr/lib/libstdc++.6.dylib").exists()) {
643      CmdArgs.push_back("/usr/lib/libstdc++.6.dylib");
644      return;
645    }
646
647    // Otherwise, let the linker search.
648    CmdArgs.push_back("-lstdc++");
649    break;
650  }
651  }
652}
653
654void DarwinClang::AddCCKextLibArgs(const ArgList &Args,
655                                   ArgStringList &CmdArgs) const {
656
657  // For Darwin platforms, use the compiler-rt-based support library
658  // instead of the gcc-provided one (which is also incidentally
659  // only present in the gcc lib dir, which makes it hard to find).
660
661  llvm::sys::Path P(getDriver().ResourceDir);
662  P.appendComponent("lib");
663  P.appendComponent("darwin");
664  P.appendComponent("libclang_rt.cc_kext.a");
665
666  // For now, allow missing resource libraries to support developers who may
667  // not have compiler-rt checked out or integrated into their build.
668  if (P.exists())
669    CmdArgs.push_back(Args.MakeArgString(P.str()));
670}
671
672DerivedArgList *Darwin::TranslateArgs(const DerivedArgList &Args,
673                                      const char *BoundArch) const {
674  DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
675  const OptTable &Opts = getDriver().getOpts();
676
677  // FIXME: We really want to get out of the tool chain level argument
678  // translation business, as it makes the driver functionality much
679  // more opaque. For now, we follow gcc closely solely for the
680  // purpose of easily achieving feature parity & testability. Once we
681  // have something that works, we should reevaluate each translation
682  // and try to push it down into tool specific logic.
683
684  for (ArgList::const_iterator it = Args.begin(),
685         ie = Args.end(); it != ie; ++it) {
686    Arg *A = *it;
687
688    if (A->getOption().matches(options::OPT_Xarch__)) {
689      // FIXME: Canonicalize name.
690      if (getArchName() != A->getValue(Args, 0))
691        continue;
692
693      unsigned Index = Args.getBaseArgs().MakeIndex(A->getValue(Args, 1));
694      unsigned Prev = Index;
695      Arg *XarchArg = Opts.ParseOneArg(Args, Index);
696
697      // If the argument parsing failed or more than one argument was
698      // consumed, the -Xarch_ argument's parameter tried to consume
699      // extra arguments. Emit an error and ignore.
700      //
701      // We also want to disallow any options which would alter the
702      // driver behavior; that isn't going to work in our model. We
703      // use isDriverOption() as an approximation, although things
704      // like -O4 are going to slip through.
705      if (!XarchArg || Index > Prev + 1 ||
706          XarchArg->getOption().isDriverOption()) {
707       getDriver().Diag(clang::diag::err_drv_invalid_Xarch_argument)
708          << A->getAsString(Args);
709        continue;
710      }
711
712      XarchArg->setBaseArg(A);
713      A = XarchArg;
714
715      DAL->AddSynthesizedArg(A);
716    }
717
718    // Sob. These is strictly gcc compatible for the time being. Apple
719    // gcc translates options twice, which means that self-expanding
720    // options add duplicates.
721    switch ((options::ID) A->getOption().getID()) {
722    default:
723      DAL->append(A);
724      break;
725
726    case options::OPT_mkernel:
727    case options::OPT_fapple_kext:
728      DAL->append(A);
729      DAL->AddFlagArg(A, Opts.getOption(options::OPT_static));
730      DAL->AddFlagArg(A, Opts.getOption(options::OPT_static));
731      break;
732
733    case options::OPT_dependency_file:
734      DAL->AddSeparateArg(A, Opts.getOption(options::OPT_MF),
735                          A->getValue(Args));
736      break;
737
738    case options::OPT_gfull:
739      DAL->AddFlagArg(A, Opts.getOption(options::OPT_g_Flag));
740      DAL->AddFlagArg(A,
741               Opts.getOption(options::OPT_fno_eliminate_unused_debug_symbols));
742      break;
743
744    case options::OPT_gused:
745      DAL->AddFlagArg(A, Opts.getOption(options::OPT_g_Flag));
746      DAL->AddFlagArg(A,
747             Opts.getOption(options::OPT_feliminate_unused_debug_symbols));
748      break;
749
750    case options::OPT_fterminated_vtables:
751    case options::OPT_findirect_virtual_calls:
752      DAL->AddFlagArg(A, Opts.getOption(options::OPT_fapple_kext));
753      DAL->AddFlagArg(A, Opts.getOption(options::OPT_static));
754      break;
755
756    case options::OPT_shared:
757      DAL->AddFlagArg(A, Opts.getOption(options::OPT_dynamiclib));
758      break;
759
760    case options::OPT_fconstant_cfstrings:
761      DAL->AddFlagArg(A, Opts.getOption(options::OPT_mconstant_cfstrings));
762      break;
763
764    case options::OPT_fno_constant_cfstrings:
765      DAL->AddFlagArg(A, Opts.getOption(options::OPT_mno_constant_cfstrings));
766      break;
767
768    case options::OPT_Wnonportable_cfstrings:
769      DAL->AddFlagArg(A,
770                      Opts.getOption(options::OPT_mwarn_nonportable_cfstrings));
771      break;
772
773    case options::OPT_Wno_nonportable_cfstrings:
774      DAL->AddFlagArg(A,
775                   Opts.getOption(options::OPT_mno_warn_nonportable_cfstrings));
776      break;
777
778    case options::OPT_fpascal_strings:
779      DAL->AddFlagArg(A, Opts.getOption(options::OPT_mpascal_strings));
780      break;
781
782    case options::OPT_fno_pascal_strings:
783      DAL->AddFlagArg(A, Opts.getOption(options::OPT_mno_pascal_strings));
784      break;
785    }
786  }
787
788  if (getTriple().getArch() == llvm::Triple::x86 ||
789      getTriple().getArch() == llvm::Triple::x86_64)
790    if (!Args.hasArgNoClaim(options::OPT_mtune_EQ))
791      DAL->AddJoinedArg(0, Opts.getOption(options::OPT_mtune_EQ), "core2");
792
793  // Add the arch options based on the particular spelling of -arch, to match
794  // how the driver driver works.
795  if (BoundArch) {
796    llvm::StringRef Name = BoundArch;
797    const Option *MCpu = Opts.getOption(options::OPT_mcpu_EQ);
798    const Option *MArch = Opts.getOption(options::OPT_march_EQ);
799
800    // This code must be kept in sync with LLVM's getArchTypeForDarwinArch,
801    // which defines the list of which architectures we accept.
802    if (Name == "ppc")
803      ;
804    else if (Name == "ppc601")
805      DAL->AddJoinedArg(0, MCpu, "601");
806    else if (Name == "ppc603")
807      DAL->AddJoinedArg(0, MCpu, "603");
808    else if (Name == "ppc604")
809      DAL->AddJoinedArg(0, MCpu, "604");
810    else if (Name == "ppc604e")
811      DAL->AddJoinedArg(0, MCpu, "604e");
812    else if (Name == "ppc750")
813      DAL->AddJoinedArg(0, MCpu, "750");
814    else if (Name == "ppc7400")
815      DAL->AddJoinedArg(0, MCpu, "7400");
816    else if (Name == "ppc7450")
817      DAL->AddJoinedArg(0, MCpu, "7450");
818    else if (Name == "ppc970")
819      DAL->AddJoinedArg(0, MCpu, "970");
820
821    else if (Name == "ppc64")
822      DAL->AddFlagArg(0, Opts.getOption(options::OPT_m64));
823
824    else if (Name == "i386")
825      ;
826    else if (Name == "i486")
827      DAL->AddJoinedArg(0, MArch, "i486");
828    else if (Name == "i586")
829      DAL->AddJoinedArg(0, MArch, "i586");
830    else if (Name == "i686")
831      DAL->AddJoinedArg(0, MArch, "i686");
832    else if (Name == "pentium")
833      DAL->AddJoinedArg(0, MArch, "pentium");
834    else if (Name == "pentium2")
835      DAL->AddJoinedArg(0, MArch, "pentium2");
836    else if (Name == "pentpro")
837      DAL->AddJoinedArg(0, MArch, "pentiumpro");
838    else if (Name == "pentIIm3")
839      DAL->AddJoinedArg(0, MArch, "pentium2");
840
841    else if (Name == "x86_64")
842      DAL->AddFlagArg(0, Opts.getOption(options::OPT_m64));
843
844    else if (Name == "arm")
845      DAL->AddJoinedArg(0, MArch, "armv4t");
846    else if (Name == "armv4t")
847      DAL->AddJoinedArg(0, MArch, "armv4t");
848    else if (Name == "armv5")
849      DAL->AddJoinedArg(0, MArch, "armv5tej");
850    else if (Name == "xscale")
851      DAL->AddJoinedArg(0, MArch, "xscale");
852    else if (Name == "armv6")
853      DAL->AddJoinedArg(0, MArch, "armv6k");
854    else if (Name == "armv7")
855      DAL->AddJoinedArg(0, MArch, "armv7a");
856
857    else
858      llvm_unreachable("invalid Darwin arch");
859  }
860
861  // Add an explicit version min argument for the deployment target. We do this
862  // after argument translation because -Xarch_ arguments may add a version min
863  // argument.
864  AddDeploymentTarget(*DAL);
865
866  return DAL;
867}
868
869bool Darwin::IsUnwindTablesDefault() const {
870  // FIXME: Gross; we should probably have some separate target
871  // definition, possibly even reusing the one in clang.
872  return getArchName() == "x86_64";
873}
874
875bool Darwin::UseDwarfDebugFlags() const {
876  if (const char *S = ::getenv("RC_DEBUG_OPTIONS"))
877    return S[0] != '\0';
878  return false;
879}
880
881bool Darwin::UseSjLjExceptions() const {
882  // Darwin uses SjLj exceptions on ARM.
883  return (getTriple().getArch() == llvm::Triple::arm ||
884          getTriple().getArch() == llvm::Triple::thumb);
885}
886
887const char *Darwin::GetDefaultRelocationModel() const {
888  return "pic";
889}
890
891const char *Darwin::GetForcedPicModel() const {
892  if (getArchName() == "x86_64")
893    return "pic";
894  return 0;
895}
896
897bool Darwin::SupportsObjCGC() const {
898  // Garbage collection is supported everywhere except on iPhone OS.
899  return !isTargetIPhoneOS();
900}
901
902std::string
903Darwin_Generic_GCC::ComputeEffectiveClangTriple(const ArgList &Args) const {
904  return ComputeLLVMTriple(Args);
905}
906
907/// Generic_GCC - A tool chain using the 'gcc' command to perform
908/// all subcommands; this relies on gcc translating the majority of
909/// command line options.
910
911Generic_GCC::Generic_GCC(const HostInfo &Host, const llvm::Triple& Triple)
912  : ToolChain(Host, Triple) {
913  getProgramPaths().push_back(getDriver().getInstalledDir());
914  if (getDriver().getInstalledDir() != getDriver().Dir.c_str())
915    getProgramPaths().push_back(getDriver().Dir);
916}
917
918Generic_GCC::~Generic_GCC() {
919  // Free tool implementations.
920  for (llvm::DenseMap<unsigned, Tool*>::iterator
921         it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
922    delete it->second;
923}
924
925Tool &Generic_GCC::SelectTool(const Compilation &C,
926                              const JobAction &JA) const {
927  Action::ActionClass Key;
928  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
929    Key = Action::AnalyzeJobClass;
930  else
931    Key = JA.getKind();
932
933  Tool *&T = Tools[Key];
934  if (!T) {
935    switch (Key) {
936    case Action::InputClass:
937    case Action::BindArchClass:
938      assert(0 && "Invalid tool kind.");
939    case Action::PreprocessJobClass:
940      T = new tools::gcc::Preprocess(*this); break;
941    case Action::PrecompileJobClass:
942      T = new tools::gcc::Precompile(*this); break;
943    case Action::AnalyzeJobClass:
944      T = new tools::Clang(*this); break;
945    case Action::CompileJobClass:
946      T = new tools::gcc::Compile(*this); break;
947    case Action::AssembleJobClass:
948      T = new tools::gcc::Assemble(*this); break;
949    case Action::LinkJobClass:
950      T = new tools::gcc::Link(*this); break;
951
952      // This is a bit ungeneric, but the only platform using a driver
953      // driver is Darwin.
954    case Action::LipoJobClass:
955      T = new tools::darwin::Lipo(*this); break;
956    case Action::DsymutilJobClass:
957      T = new tools::darwin::Dsymutil(*this); break;
958    }
959  }
960
961  return *T;
962}
963
964bool Generic_GCC::IsUnwindTablesDefault() const {
965  // FIXME: Gross; we should probably have some separate target
966  // definition, possibly even reusing the one in clang.
967  return getArchName() == "x86_64";
968}
969
970const char *Generic_GCC::GetDefaultRelocationModel() const {
971  return "static";
972}
973
974const char *Generic_GCC::GetForcedPicModel() const {
975  return 0;
976}
977
978/// TCEToolChain - A tool chain using the llvm bitcode tools to perform
979/// all subcommands. See http://tce.cs.tut.fi for our peculiar target.
980/// Currently does not support anything else but compilation.
981
982TCEToolChain::TCEToolChain(const HostInfo &Host, const llvm::Triple& Triple)
983  : ToolChain(Host, Triple) {
984  // Path mangling to find libexec
985  std::string Path(getDriver().Dir);
986
987  Path += "/../libexec";
988  getProgramPaths().push_back(Path);
989}
990
991TCEToolChain::~TCEToolChain() {
992  for (llvm::DenseMap<unsigned, Tool*>::iterator
993           it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
994      delete it->second;
995}
996
997bool TCEToolChain::IsMathErrnoDefault() const {
998  return true;
999}
1000
1001bool TCEToolChain::IsUnwindTablesDefault() const {
1002  return false;
1003}
1004
1005const char *TCEToolChain::GetDefaultRelocationModel() const {
1006  return "static";
1007}
1008
1009const char *TCEToolChain::GetForcedPicModel() const {
1010  return 0;
1011}
1012
1013Tool &TCEToolChain::SelectTool(const Compilation &C,
1014                            const JobAction &JA) const {
1015  Action::ActionClass Key;
1016  Key = Action::AnalyzeJobClass;
1017
1018  Tool *&T = Tools[Key];
1019  if (!T) {
1020    switch (Key) {
1021    case Action::PreprocessJobClass:
1022      T = new tools::gcc::Preprocess(*this); break;
1023    case Action::AnalyzeJobClass:
1024      T = new tools::Clang(*this); break;
1025    default:
1026     assert(false && "Unsupported action for TCE target.");
1027    }
1028  }
1029  return *T;
1030}
1031
1032/// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly.
1033
1034OpenBSD::OpenBSD(const HostInfo &Host, const llvm::Triple& Triple)
1035  : Generic_ELF(Host, Triple) {
1036  getFilePaths().push_back(getDriver().Dir + "/../lib");
1037  getFilePaths().push_back("/usr/lib");
1038}
1039
1040Tool &OpenBSD::SelectTool(const Compilation &C, const JobAction &JA) const {
1041  Action::ActionClass Key;
1042  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1043    Key = Action::AnalyzeJobClass;
1044  else
1045    Key = JA.getKind();
1046
1047  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
1048                                             options::OPT_no_integrated_as,
1049                                             IsIntegratedAssemblerDefault());
1050
1051  Tool *&T = Tools[Key];
1052  if (!T) {
1053    switch (Key) {
1054    case Action::AssembleJobClass: {
1055      if (UseIntegratedAs)
1056        T = new tools::ClangAs(*this);
1057      else
1058        T = new tools::openbsd::Assemble(*this);
1059      break;
1060    }
1061    case Action::LinkJobClass:
1062      T = new tools::openbsd::Link(*this); break;
1063    default:
1064      T = &Generic_GCC::SelectTool(C, JA);
1065    }
1066  }
1067
1068  return *T;
1069}
1070
1071/// FreeBSD - FreeBSD tool chain which can call as(1) and ld(1) directly.
1072
1073FreeBSD::FreeBSD(const HostInfo &Host, const llvm::Triple& Triple)
1074  : Generic_ELF(Host, Triple) {
1075
1076  // Determine if we are compiling 32-bit code on an x86_64 platform.
1077  bool Lib32 = false;
1078  if (Triple.getArch() == llvm::Triple::x86 &&
1079      llvm::Triple(getDriver().DefaultHostTriple).getArch() ==
1080        llvm::Triple::x86_64)
1081    Lib32 = true;
1082
1083  getProgramPaths().push_back(getDriver().Dir + "/../libexec");
1084  getProgramPaths().push_back("/usr/libexec");
1085  if (Lib32) {
1086    getFilePaths().push_back(getDriver().Dir + "/../lib32");
1087    getFilePaths().push_back("/usr/lib32");
1088  } else {
1089    getFilePaths().push_back(getDriver().Dir + "/../lib");
1090    getFilePaths().push_back("/usr/lib");
1091  }
1092}
1093
1094Tool &FreeBSD::SelectTool(const Compilation &C, const JobAction &JA) const {
1095  Action::ActionClass Key;
1096  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1097    Key = Action::AnalyzeJobClass;
1098  else
1099    Key = JA.getKind();
1100
1101  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
1102                                             options::OPT_no_integrated_as,
1103                                             IsIntegratedAssemblerDefault());
1104
1105  Tool *&T = Tools[Key];
1106  if (!T) {
1107    switch (Key) {
1108    case Action::AssembleJobClass:
1109      if (UseIntegratedAs)
1110        T = new tools::ClangAs(*this);
1111      else
1112        T = new tools::freebsd::Assemble(*this);
1113      break;
1114    case Action::LinkJobClass:
1115      T = new tools::freebsd::Link(*this); break;
1116    default:
1117      T = &Generic_GCC::SelectTool(C, JA);
1118    }
1119  }
1120
1121  return *T;
1122}
1123
1124/// Minix - Minix tool chain which can call as(1) and ld(1) directly.
1125
1126Minix::Minix(const HostInfo &Host, const llvm::Triple& Triple)
1127  : Generic_GCC(Host, Triple) {
1128  getFilePaths().push_back(getDriver().Dir + "/../lib");
1129  getFilePaths().push_back("/usr/lib");
1130  getFilePaths().push_back("/usr/gnu/lib");
1131  getFilePaths().push_back("/usr/gnu/lib/gcc/i686-pc-minix/4.4.3");
1132}
1133
1134Tool &Minix::SelectTool(const Compilation &C, const JobAction &JA) const {
1135  Action::ActionClass Key;
1136  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1137    Key = Action::AnalyzeJobClass;
1138  else
1139    Key = JA.getKind();
1140
1141  Tool *&T = Tools[Key];
1142  if (!T) {
1143    switch (Key) {
1144    case Action::AssembleJobClass:
1145      T = new tools::minix::Assemble(*this); break;
1146    case Action::LinkJobClass:
1147      T = new tools::minix::Link(*this); break;
1148    default:
1149      T = &Generic_GCC::SelectTool(C, JA);
1150    }
1151  }
1152
1153  return *T;
1154}
1155
1156/// AuroraUX - AuroraUX tool chain which can call as(1) and ld(1) directly.
1157
1158AuroraUX::AuroraUX(const HostInfo &Host, const llvm::Triple& Triple)
1159  : Generic_GCC(Host, Triple) {
1160
1161  getProgramPaths().push_back(getDriver().getInstalledDir());
1162  if (getDriver().getInstalledDir() != getDriver().Dir.c_str())
1163    getProgramPaths().push_back(getDriver().Dir);
1164
1165  getFilePaths().push_back(getDriver().Dir + "/../lib");
1166  getFilePaths().push_back("/usr/lib");
1167  getFilePaths().push_back("/usr/sfw/lib");
1168  getFilePaths().push_back("/opt/gcc4/lib");
1169  getFilePaths().push_back("/opt/gcc4/lib/gcc/i386-pc-solaris2.11/4.2.4");
1170
1171}
1172
1173Tool &AuroraUX::SelectTool(const Compilation &C, const JobAction &JA) const {
1174  Action::ActionClass Key;
1175  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1176    Key = Action::AnalyzeJobClass;
1177  else
1178    Key = JA.getKind();
1179
1180  Tool *&T = Tools[Key];
1181  if (!T) {
1182    switch (Key) {
1183    case Action::AssembleJobClass:
1184      T = new tools::auroraux::Assemble(*this); break;
1185    case Action::LinkJobClass:
1186      T = new tools::auroraux::Link(*this); break;
1187    default:
1188      T = &Generic_GCC::SelectTool(C, JA);
1189    }
1190  }
1191
1192  return *T;
1193}
1194
1195
1196/// Linux toolchain (very bare-bones at the moment).
1197
1198enum LinuxDistro {
1199  DebianLenny,
1200  DebianSqueeze,
1201  Fedora13,
1202  Fedora14,
1203  OpenSuse11_3,
1204  UbuntuLucid,
1205  UbuntuMaverick,
1206  UnknownDistro
1207};
1208
1209static bool IsFedora(enum LinuxDistro Distro) {
1210  return Distro == Fedora13 || Distro == Fedora14;
1211}
1212
1213static bool IsOpenSuse(enum LinuxDistro Distro) {
1214  return Distro == OpenSuse11_3;
1215}
1216
1217static bool IsDebian(enum LinuxDistro Distro) {
1218  return Distro == DebianLenny || Distro == DebianSqueeze;
1219}
1220
1221static bool IsUbuntu(enum LinuxDistro Distro) {
1222  return Distro == UbuntuLucid || Distro == UbuntuMaverick;
1223}
1224
1225static bool IsDebianBased(enum LinuxDistro Distro) {
1226  return IsDebian(Distro) || IsUbuntu(Distro);
1227}
1228
1229static bool HasMultilib(llvm::Triple::ArchType Arch, enum LinuxDistro Distro) {
1230  if (Arch == llvm::Triple::x86_64)
1231    return true;
1232  if (Arch == llvm::Triple::x86 && IsDebianBased(Distro))
1233    return true;
1234  return false;
1235}
1236
1237static LinuxDistro DetectLinuxDistro(llvm::Triple::ArchType Arch) {
1238  llvm::OwningPtr<const llvm::MemoryBuffer>
1239    LsbRelease(llvm::MemoryBuffer::getFile("/etc/lsb-release"));
1240  if (LsbRelease) {
1241    llvm::StringRef Data = LsbRelease.get()->getBuffer();
1242    llvm::SmallVector<llvm::StringRef, 8> Lines;
1243    Data.split(Lines, "\n");
1244    for (unsigned int i = 0, s = Lines.size(); i < s; ++ i) {
1245      if (Lines[i] == "DISTRIB_CODENAME=maverick")
1246        return UbuntuMaverick;
1247      else if (Lines[i] == "DISTRIB_CODENAME=lucid")
1248        return UbuntuLucid;
1249    }
1250    return UnknownDistro;
1251  }
1252
1253  llvm::OwningPtr<const llvm::MemoryBuffer>
1254    RHRelease(llvm::MemoryBuffer::getFile("/etc/redhat-release"));
1255  if (RHRelease) {
1256    llvm::StringRef Data = RHRelease.get()->getBuffer();
1257    if (Data.startswith("Fedora release 14 (Laughlin)"))
1258      return Fedora14;
1259    else if (Data.startswith("Fedora release 13 (Goddard)"))
1260      return Fedora13;
1261    return UnknownDistro;
1262  }
1263
1264  llvm::OwningPtr<const llvm::MemoryBuffer>
1265    DebianVersion(llvm::MemoryBuffer::getFile("/etc/debian_version"));
1266  if (DebianVersion) {
1267    llvm::StringRef Data = DebianVersion.get()->getBuffer();
1268    if (Data[0] == '5')
1269      return DebianLenny;
1270    else if (Data.startswith("squeeze/sid"))
1271      return DebianSqueeze;
1272    return UnknownDistro;
1273  }
1274
1275  llvm::OwningPtr<const llvm::MemoryBuffer>
1276    SuseRelease(llvm::MemoryBuffer::getFile("/etc/SuSE-release"));
1277  if (SuseRelease) {
1278    llvm::StringRef Data = SuseRelease.get()->getBuffer();
1279    if (Data.startswith("openSUSE 11.3"))
1280      return OpenSuse11_3;
1281    return UnknownDistro;
1282  }
1283
1284  return UnknownDistro;
1285}
1286
1287Linux::Linux(const HostInfo &Host, const llvm::Triple& Triple)
1288  : Generic_ELF(Host, Triple) {
1289  llvm::Triple::ArchType Arch =
1290    llvm::Triple(getDriver().DefaultHostTriple).getArch();
1291
1292  std::string Suffix32  = "";
1293  if (Arch == llvm::Triple::x86_64)
1294    Suffix32 = "/32";
1295
1296  std::string Suffix64  = "";
1297  if (Arch == llvm::Triple::x86)
1298    Suffix64 = "/64";
1299
1300  std::string Lib32 = "lib";
1301
1302  if (  llvm::sys::Path("/lib32").exists())
1303    Lib32 = "lib32";
1304
1305  std::string Lib64 = "lib";
1306  llvm::sys::Path Lib64Path("/lib64");
1307  if (Lib64Path.exists() && !Lib64Path.isSymLink())
1308    Lib64 = "lib64";
1309
1310  std::string GccTriple = "";
1311  if (Arch == llvm::Triple::arm) {
1312    if (llvm::sys::Path("/usr/lib/gcc/arm-linux-gnueabi").exists())
1313      GccTriple = "arm-linux-gnueabi";
1314  } else if (Arch == llvm::Triple::x86_64) {
1315    if (llvm::sys::Path("/usr/lib/gcc/x86_64-linux-gnu").exists())
1316      GccTriple = "x86_64-linux-gnu";
1317    else if (llvm::sys::Path("/usr/lib/gcc/x86_64-redhat-linux").exists())
1318      GccTriple = "x86_64-redhat-linux";
1319    else if (llvm::sys::Path("/usr/lib64/gcc/x86_64-suse-linux").exists())
1320      GccTriple = "x86_64-suse-linux";
1321  } else if (Arch == llvm::Triple::x86) {
1322    if (llvm::sys::Path("/usr/lib/gcc/i686-linux-gnu").exists())
1323      GccTriple = "i686-linux-gnu";
1324    else if (llvm::sys::Path("/usr/lib/gcc/i486-linux-gnu").exists())
1325      GccTriple = "i486-linux-gnu";
1326    else if (llvm::sys::Path("/usr/lib/gcc/i686-redhat-linux").exists())
1327      GccTriple = "i686-redhat-linux";
1328    else if (llvm::sys::Path("/usr/lib/gcc/i586-suse-linux").exists())
1329      GccTriple = "i586-suse-linux";
1330  }
1331
1332  const char* GccVersions[] = {"4.5.1", "4.5", "4.4.5", "4.4.4", "4.4.3",
1333                               "4.3.2"};
1334  std::string Base = "";
1335  for (unsigned i = 0; i < sizeof(GccVersions)/sizeof(char*); ++i) {
1336    std::string Suffix = GccTriple + "/" + GccVersions[i];
1337    std::string t1 = "/usr/lib/gcc/" + Suffix;
1338    if (llvm::sys::Path(t1 + "/crtbegin.o").exists()) {
1339      Base = t1;
1340      break;
1341    }
1342    std::string t2 = "/usr/lib64/gcc/" + Suffix;
1343    if (llvm::sys::Path(t2 + "/crtbegin.o").exists()) {
1344      Base = t2;
1345      break;
1346    }
1347  }
1348
1349  path_list &Paths = getFilePaths();
1350  bool Is32Bits = getArch() == llvm::Triple::x86;
1351
1352  std::string Suffix;
1353  std::string Lib;
1354
1355  if (Is32Bits) {
1356    Suffix = Suffix32;
1357    Lib = Lib32;
1358  } else {
1359    Suffix = Suffix64;
1360    Lib = Lib64;
1361  }
1362
1363  llvm::sys::Path LinkerPath(Base + "/../../../../" + GccTriple + "/bin/ld");
1364  if (LinkerPath.exists())
1365    Linker = LinkerPath.str();
1366  else
1367    Linker = GetProgramPath("ld");
1368
1369  LinuxDistro Distro = DetectLinuxDistro(Arch);
1370
1371  if (IsUbuntu(Distro)) {
1372    ExtraOpts.push_back("-z");
1373    ExtraOpts.push_back("relro");
1374  }
1375
1376  if (Arch == llvm::Triple::arm)
1377    ExtraOpts.push_back("-X");
1378
1379  if (IsFedora(Distro) || Distro == UbuntuMaverick)
1380    ExtraOpts.push_back("--hash-style=gnu");
1381
1382  if (IsDebian(Distro) || Distro == UbuntuLucid)
1383    ExtraOpts.push_back("--hash-style=both");
1384
1385  if (IsFedora(Distro))
1386    ExtraOpts.push_back("--no-add-needed");
1387
1388  if (Distro == DebianSqueeze || IsUbuntu(Distro) || IsOpenSuse(Distro) ||
1389      IsFedora(Distro))
1390    ExtraOpts.push_back("--build-id");
1391
1392  Paths.push_back(Base + Suffix);
1393  if (HasMultilib(Arch, Distro)) {
1394    if (IsOpenSuse(Distro) && Is32Bits)
1395      Paths.push_back(Base + "/../../../../" + GccTriple + "/lib/../lib");
1396    Paths.push_back(Base + "/../../../../" + Lib);
1397    Paths.push_back("/lib/../" + Lib);
1398    Paths.push_back("/usr/lib/../" + Lib);
1399  }
1400  if (!Suffix.empty())
1401    Paths.push_back(Base);
1402  if (IsOpenSuse(Distro))
1403    Paths.push_back(Base + "/../../../../" + GccTriple + "/lib");
1404  Paths.push_back(Base + "/../../..");
1405  if (Arch == getArch() && IsUbuntu(Distro))
1406    Paths.push_back("/usr/lib/" + GccTriple);
1407}
1408
1409bool Linux::HasNativeLLVMSupport() const {
1410  return true;
1411}
1412
1413Tool &Linux::SelectTool(const Compilation &C, const JobAction &JA) const {
1414  Action::ActionClass Key;
1415  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1416    Key = Action::AnalyzeJobClass;
1417  else
1418    Key = JA.getKind();
1419
1420  bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
1421                                             options::OPT_no_integrated_as,
1422                                             IsIntegratedAssemblerDefault());
1423
1424  Tool *&T = Tools[Key];
1425  if (!T) {
1426    switch (Key) {
1427    case Action::AssembleJobClass:
1428      if (UseIntegratedAs)
1429        T = new tools::ClangAs(*this);
1430      else
1431        T = new tools::linuxtools::Assemble(*this);
1432      break;
1433    case Action::LinkJobClass:
1434      T = new tools::linuxtools::Link(*this); break;
1435    default:
1436      T = &Generic_GCC::SelectTool(C, JA);
1437    }
1438  }
1439
1440  return *T;
1441}
1442
1443/// DragonFly - DragonFly tool chain which can call as(1) and ld(1) directly.
1444
1445DragonFly::DragonFly(const HostInfo &Host, const llvm::Triple& Triple)
1446  : Generic_ELF(Host, Triple) {
1447
1448  // Path mangling to find libexec
1449  getProgramPaths().push_back(getDriver().getInstalledDir());
1450  if (getDriver().getInstalledDir() != getDriver().Dir.c_str())
1451    getProgramPaths().push_back(getDriver().Dir);
1452
1453  getFilePaths().push_back(getDriver().Dir + "/../lib");
1454  getFilePaths().push_back("/usr/lib");
1455  getFilePaths().push_back("/usr/lib/gcc41");
1456}
1457
1458Tool &DragonFly::SelectTool(const Compilation &C, const JobAction &JA) const {
1459  Action::ActionClass Key;
1460  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1461    Key = Action::AnalyzeJobClass;
1462  else
1463    Key = JA.getKind();
1464
1465  Tool *&T = Tools[Key];
1466  if (!T) {
1467    switch (Key) {
1468    case Action::AssembleJobClass:
1469      T = new tools::dragonfly::Assemble(*this); break;
1470    case Action::LinkJobClass:
1471      T = new tools::dragonfly::Link(*this); break;
1472    default:
1473      T = &Generic_GCC::SelectTool(C, JA);
1474    }
1475  }
1476
1477  return *T;
1478}
1479
1480Windows::Windows(const HostInfo &Host, const llvm::Triple& Triple)
1481  : ToolChain(Host, Triple) {
1482}
1483
1484Tool &Windows::SelectTool(const Compilation &C, const JobAction &JA) const {
1485  Action::ActionClass Key;
1486  if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
1487    Key = Action::AnalyzeJobClass;
1488  else
1489    Key = JA.getKind();
1490
1491  Tool *&T = Tools[Key];
1492  if (!T) {
1493    switch (Key) {
1494    case Action::InputClass:
1495    case Action::BindArchClass:
1496    case Action::LipoJobClass:
1497    case Action::DsymutilJobClass:
1498      assert(0 && "Invalid tool kind.");
1499    case Action::PreprocessJobClass:
1500    case Action::PrecompileJobClass:
1501    case Action::AnalyzeJobClass:
1502    case Action::CompileJobClass:
1503      T = new tools::Clang(*this); break;
1504    case Action::AssembleJobClass:
1505      T = new tools::ClangAs(*this); break;
1506    case Action::LinkJobClass:
1507      T = new tools::visualstudio::Link(*this); break;
1508    }
1509  }
1510
1511  return *T;
1512}
1513
1514bool Windows::IsIntegratedAssemblerDefault() const {
1515  return true;
1516}
1517
1518bool Windows::IsUnwindTablesDefault() const {
1519  // FIXME: Gross; we should probably have some separate target
1520  // definition, possibly even reusing the one in clang.
1521  return getArchName() == "x86_64";
1522}
1523
1524const char *Windows::GetDefaultRelocationModel() const {
1525  return "static";
1526}
1527
1528const char *Windows::GetForcedPicModel() const {
1529  if (getArchName() == "x86_64")
1530    return "pic";
1531  return 0;
1532}
1533