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      1 //===--- HostInfo.cpp - Host specific information -------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #include "clang/Driver/HostInfo.h"
     11 
     12 #include "clang/Driver/Arg.h"
     13 #include "clang/Driver/ArgList.h"
     14 #include "clang/Driver/Driver.h"
     15 #include "clang/Driver/DriverDiagnostic.h"
     16 #include "clang/Driver/Option.h"
     17 #include "clang/Driver/Options.h"
     18 
     19 #include "llvm/ADT/StringMap.h"
     20 #include "llvm/Support/Compiler.h"
     21 
     22 #include "ToolChains.h"
     23 
     24 #include <cassert>
     25 
     26 using namespace clang::driver;
     27 
     28 HostInfo::HostInfo(const Driver &D, const llvm::Triple &_Triple)
     29   : TheDriver(D), Triple(_Triple) {
     30 }
     31 
     32 HostInfo::~HostInfo() {
     33 }
     34 
     35 namespace {
     36 
     37 // Darwin Host Info
     38 
     39 /// DarwinHostInfo - Darwin host information implementation.
     40 class DarwinHostInfo : public HostInfo {
     41   /// Cache of tool chains we have created.
     42   mutable llvm::DenseMap<unsigned, ToolChain*> ToolChains;
     43 
     44 public:
     45   DarwinHostInfo(const Driver &D, const llvm::Triple &Triple);
     46   ~DarwinHostInfo();
     47 
     48   virtual bool useDriverDriver() const;
     49 
     50   virtual ToolChain *CreateToolChain(const ArgList &Args,
     51                                      const char *ArchName) const;
     52 };
     53 
     54 DarwinHostInfo::DarwinHostInfo(const Driver &D, const llvm::Triple& Triple)
     55   : HostInfo(D, Triple) {
     56 }
     57 
     58 DarwinHostInfo::~DarwinHostInfo() {
     59   for (llvm::DenseMap<unsigned, ToolChain*>::iterator
     60          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it)
     61     delete it->second;
     62 }
     63 
     64 bool DarwinHostInfo::useDriverDriver() const {
     65   return true;
     66 }
     67 
     68 ToolChain *DarwinHostInfo::CreateToolChain(const ArgList &Args,
     69                                            const char *ArchName) const {
     70   llvm::Triple::ArchType Arch;
     71 
     72   if (!ArchName) {
     73     // If we aren't looking for a specific arch, infer the default architecture
     74     // based on -arch and -m32/-m64 command line options.
     75     if (Arg *A = Args.getLastArg(options::OPT_arch)) {
     76       // The gcc driver behavior with multiple -arch flags wasn't consistent for
     77       // things which rely on a default architecture. We just use the last -arch
     78       // to find the default tool chain (assuming it is valid).
     79       Arch = llvm::Triple::getArchTypeForDarwinArchName(A->getValue(Args));
     80 
     81       // If it was invalid just use the host, we will reject this command line
     82       // later.
     83       if (Arch == llvm::Triple::UnknownArch)
     84         Arch = getTriple().getArch();
     85     } else {
     86       // Otherwise default to the arch of the host.
     87       Arch = getTriple().getArch();
     88     }
     89 
     90     // Honor -m32 and -m64 when finding the default tool chain.
     91     //
     92     // FIXME: Should this information be in llvm::Triple?
     93     if (Arg *A = Args.getLastArg(options::OPT_m32, options::OPT_m64)) {
     94       if (A->getOption().matches(options::OPT_m32)) {
     95         if (Arch == llvm::Triple::x86_64)
     96           Arch = llvm::Triple::x86;
     97         if (Arch == llvm::Triple::ppc64)
     98           Arch = llvm::Triple::ppc;
     99       } else {
    100         if (Arch == llvm::Triple::x86)
    101           Arch = llvm::Triple::x86_64;
    102         if (Arch == llvm::Triple::ppc)
    103           Arch = llvm::Triple::ppc64;
    104       }
    105     }
    106   } else
    107     Arch = llvm::Triple::getArchTypeForDarwinArchName(ArchName);
    108 
    109   assert(Arch != llvm::Triple::UnknownArch && "Unexpected arch!");
    110   ToolChain *&TC = ToolChains[Arch];
    111   if (!TC) {
    112     llvm::Triple TCTriple(getTriple());
    113     TCTriple.setArch(Arch);
    114 
    115     // If we recognized the arch, match it to the toolchains we support.
    116     if (Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64 ||
    117         Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb) {
    118       TC = new toolchains::DarwinClang(*this, TCTriple);
    119     } else
    120       TC = new toolchains::Darwin_Generic_GCC(*this, TCTriple);
    121   }
    122 
    123   return TC;
    124 }
    125 
    126 // TCE Host Info
    127 
    128 /// TCEHostInfo - TCE host information implementation (see http://tce.cs.tut.fi)
    129 class TCEHostInfo : public HostInfo {
    130 
    131 public:
    132   TCEHostInfo(const Driver &D, const llvm::Triple &Triple);
    133   ~TCEHostInfo() {}
    134 
    135   virtual bool useDriverDriver() const;
    136 
    137   virtual ToolChain *CreateToolChain(const ArgList &Args,
    138                                      const char *ArchName) const;
    139 };
    140 
    141 TCEHostInfo::TCEHostInfo(const Driver &D, const llvm::Triple& Triple)
    142   : HostInfo(D, Triple) {
    143 }
    144 
    145 bool TCEHostInfo::useDriverDriver() const {
    146   return false;
    147 }
    148 
    149 ToolChain *TCEHostInfo::CreateToolChain(const ArgList &Args,
    150                                         const char *ArchName) const {
    151   llvm::Triple TCTriple(getTriple());
    152 //  TCTriple.setArchName(ArchName);
    153   return new toolchains::TCEToolChain(*this, TCTriple);
    154 }
    155 
    156 
    157 // Unknown Host Info
    158 
    159 /// UnknownHostInfo - Generic host information to use for unknown hosts.
    160 class UnknownHostInfo : public HostInfo {
    161   /// Cache of tool chains we have created.
    162   mutable llvm::StringMap<ToolChain*> ToolChains;
    163 
    164 public:
    165   UnknownHostInfo(const Driver &D, const llvm::Triple& Triple);
    166   ~UnknownHostInfo();
    167 
    168   virtual bool useDriverDriver() const;
    169 
    170   virtual ToolChain *CreateToolChain(const ArgList &Args,
    171                                      const char *ArchName) const;
    172 };
    173 
    174 UnknownHostInfo::UnknownHostInfo(const Driver &D, const llvm::Triple& Triple)
    175   : HostInfo(D, Triple) {
    176 }
    177 
    178 UnknownHostInfo::~UnknownHostInfo() {
    179   for (llvm::StringMap<ToolChain*>::iterator
    180          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it)
    181     delete it->second;
    182 }
    183 
    184 bool UnknownHostInfo::useDriverDriver() const {
    185   return false;
    186 }
    187 
    188 ToolChain *UnknownHostInfo::CreateToolChain(const ArgList &Args,
    189                                             const char *ArchName) const {
    190   assert(!ArchName &&
    191          "Unexpected arch name on platform without driver support.");
    192 
    193   // Automatically handle some instances of -m32/-m64 we know about.
    194   std::string Arch = getArchName();
    195   ArchName = Arch.c_str();
    196   if (Arg *A = Args.getLastArg(options::OPT_m32, options::OPT_m64)) {
    197     if (Triple.getArch() == llvm::Triple::x86 ||
    198         Triple.getArch() == llvm::Triple::x86_64) {
    199       ArchName =
    200         (A->getOption().matches(options::OPT_m32)) ? "i386" : "x86_64";
    201     } else if (Triple.getArch() == llvm::Triple::ppc ||
    202                Triple.getArch() == llvm::Triple::ppc64) {
    203       ArchName =
    204         (A->getOption().matches(options::OPT_m32)) ? "powerpc" : "powerpc64";
    205     }
    206   }
    207 
    208   ToolChain *&TC = ToolChains[ArchName];
    209   if (!TC) {
    210     llvm::Triple TCTriple(getTriple());
    211     TCTriple.setArchName(ArchName);
    212 
    213     TC = new toolchains::Generic_GCC(*this, TCTriple);
    214   }
    215 
    216   return TC;
    217 }
    218 
    219 // OpenBSD Host Info
    220 
    221 /// OpenBSDHostInfo -  OpenBSD host information implementation.
    222 class OpenBSDHostInfo : public HostInfo {
    223   /// Cache of tool chains we have created.
    224   mutable llvm::StringMap<ToolChain*> ToolChains;
    225 
    226 public:
    227   OpenBSDHostInfo(const Driver &D, const llvm::Triple& Triple)
    228     : HostInfo(D, Triple) {}
    229   ~OpenBSDHostInfo();
    230 
    231   virtual bool useDriverDriver() const;
    232 
    233   virtual ToolChain *CreateToolChain(const ArgList &Args,
    234                                      const char *ArchName) const;
    235 };
    236 
    237 OpenBSDHostInfo::~OpenBSDHostInfo() {
    238   for (llvm::StringMap<ToolChain*>::iterator
    239          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it)
    240     delete it->second;
    241 }
    242 
    243 bool OpenBSDHostInfo::useDriverDriver() const {
    244   return false;
    245 }
    246 
    247 ToolChain *OpenBSDHostInfo::CreateToolChain(const ArgList &Args,
    248                                             const char *ArchName) const {
    249   assert(!ArchName &&
    250          "Unexpected arch name on platform without driver driver support.");
    251 
    252   std::string Arch = getArchName();
    253   ArchName = Arch.c_str();
    254 
    255   ToolChain *&TC = ToolChains[ArchName];
    256   if (!TC) {
    257     llvm::Triple TCTriple(getTriple());
    258     TCTriple.setArchName(ArchName);
    259 
    260     TC = new toolchains::OpenBSD(*this, TCTriple);
    261   }
    262 
    263   return TC;
    264 }
    265 
    266 // AuroraUX Host Info
    267 
    268 /// AuroraUXHostInfo - AuroraUX host information implementation.
    269 class AuroraUXHostInfo : public HostInfo {
    270   /// Cache of tool chains we have created.
    271   mutable llvm::StringMap<ToolChain*> ToolChains;
    272 
    273 public:
    274   AuroraUXHostInfo(const Driver &D, const llvm::Triple& Triple)
    275     : HostInfo(D, Triple) {}
    276   ~AuroraUXHostInfo();
    277 
    278   virtual bool useDriverDriver() const;
    279 
    280   virtual ToolChain *CreateToolChain(const ArgList &Args,
    281                                      const char *ArchName) const;
    282 };
    283 
    284 AuroraUXHostInfo::~AuroraUXHostInfo() {
    285   for (llvm::StringMap<ToolChain*>::iterator
    286          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it)
    287     delete it->second;
    288 }
    289 
    290 bool AuroraUXHostInfo::useDriverDriver() const {
    291   return false;
    292 }
    293 
    294 ToolChain *AuroraUXHostInfo::CreateToolChain(const ArgList &Args,
    295                                              const char *ArchName) const {
    296   assert(!ArchName &&
    297          "Unexpected arch name on platform without driver driver support.");
    298 
    299   ToolChain *&TC = ToolChains[getArchName()];
    300 
    301   if (!TC) {
    302     llvm::Triple TCTriple(getTriple());
    303     TCTriple.setArchName(getArchName());
    304 
    305     TC = new toolchains::AuroraUX(*this, TCTriple);
    306   }
    307 
    308   return TC;
    309 }
    310 
    311 // FreeBSD Host Info
    312 
    313 /// FreeBSDHostInfo -  FreeBSD host information implementation.
    314 class FreeBSDHostInfo : public HostInfo {
    315   /// Cache of tool chains we have created.
    316   mutable llvm::StringMap<ToolChain*> ToolChains;
    317 
    318 public:
    319   FreeBSDHostInfo(const Driver &D, const llvm::Triple& Triple)
    320     : HostInfo(D, Triple) {}
    321   ~FreeBSDHostInfo();
    322 
    323   virtual bool useDriverDriver() const;
    324 
    325   virtual ToolChain *CreateToolChain(const ArgList &Args,
    326                                      const char *ArchName) const;
    327 };
    328 
    329 FreeBSDHostInfo::~FreeBSDHostInfo() {
    330   for (llvm::StringMap<ToolChain*>::iterator
    331          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it)
    332     delete it->second;
    333 }
    334 
    335 bool FreeBSDHostInfo::useDriverDriver() const {
    336   return false;
    337 }
    338 
    339 ToolChain *FreeBSDHostInfo::CreateToolChain(const ArgList &Args,
    340                                             const char *ArchName) const {
    341   assert(!ArchName &&
    342          "Unexpected arch name on platform without driver driver support.");
    343 
    344   // Automatically handle some instances of -m32/-m64 we know about.
    345   std::string Arch = getArchName();
    346   ArchName = Arch.c_str();
    347   if (Arg *A = Args.getLastArg(options::OPT_m32, options::OPT_m64)) {
    348     if (Triple.getArch() == llvm::Triple::x86 ||
    349         Triple.getArch() == llvm::Triple::x86_64) {
    350       ArchName =
    351         (A->getOption().matches(options::OPT_m32)) ? "i386" : "x86_64";
    352     } else if (Triple.getArch() == llvm::Triple::ppc ||
    353                Triple.getArch() == llvm::Triple::ppc64) {
    354       ArchName =
    355         (A->getOption().matches(options::OPT_m32)) ? "powerpc" : "powerpc64";
    356     }
    357   }
    358 
    359   ToolChain *&TC = ToolChains[ArchName];
    360   if (!TC) {
    361     llvm::Triple TCTriple(getTriple());
    362     TCTriple.setArchName(ArchName);
    363 
    364     TC = new toolchains::FreeBSD(*this, TCTriple);
    365   }
    366 
    367   return TC;
    368 }
    369 
    370 // NetBSD Host Info
    371 
    372 /// NetBSDHostInfo -  NetBSD host information implementation.
    373 class NetBSDHostInfo : public HostInfo {
    374   /// Cache of tool chains we have created.
    375   mutable llvm::StringMap<ToolChain*> ToolChains;
    376 
    377 public:
    378   NetBSDHostInfo(const Driver &D, const llvm::Triple& Triple)
    379     : HostInfo(D, Triple) {}
    380   ~NetBSDHostInfo();
    381 
    382   virtual bool useDriverDriver() const;
    383 
    384   virtual ToolChain *CreateToolChain(const ArgList &Args,
    385                                      const char *ArchName) const;
    386 };
    387 
    388 NetBSDHostInfo::~NetBSDHostInfo() {
    389   for (llvm::StringMap<ToolChain*>::iterator
    390          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it)
    391     delete it->second;
    392 }
    393 
    394 bool NetBSDHostInfo::useDriverDriver() const {
    395   return false;
    396 }
    397 
    398 ToolChain *NetBSDHostInfo::CreateToolChain(const ArgList &Args,
    399                                             const char *ArchName) const {
    400   assert(!ArchName &&
    401          "Unexpected arch name on platform without driver driver support.");
    402 
    403   // Automatically handle some instances of -m32/-m64 we know about.
    404   std::string Arch = getArchName();
    405   ArchName = Arch.c_str();
    406   if (Arg *A = Args.getLastArg(options::OPT_m32, options::OPT_m64)) {
    407     if (Triple.getArch() == llvm::Triple::x86 ||
    408         Triple.getArch() == llvm::Triple::x86_64) {
    409       ArchName =
    410         (A->getOption().matches(options::OPT_m32)) ? "i386" : "x86_64";
    411     } else if (Triple.getArch() == llvm::Triple::ppc ||
    412                Triple.getArch() == llvm::Triple::ppc64) {
    413       ArchName =
    414         (A->getOption().matches(options::OPT_m32)) ? "powerpc" : "powerpc64";
    415     }
    416   }
    417   llvm::Triple TargetTriple(getTriple());
    418   TargetTriple.setArchName(ArchName);
    419 
    420   ToolChain *TC;
    421 
    422   // XXX Cache toolchain even if -m32 is used
    423   if (Arch == ArchName) {
    424     TC = ToolChains[ArchName];
    425     if (TC)
    426       return TC;
    427   }
    428 
    429   TC = new toolchains::NetBSD(*this, TargetTriple, getTriple());
    430 
    431   return TC;
    432 }
    433 
    434 // Minix Host Info
    435 
    436 /// MinixHostInfo -  Minix host information implementation.
    437 class MinixHostInfo : public HostInfo {
    438   /// Cache of tool chains we have created.
    439   mutable llvm::StringMap<ToolChain*> ToolChains;
    440 
    441 public:
    442   MinixHostInfo(const Driver &D, const llvm::Triple& Triple)
    443     : HostInfo(D, Triple) {}
    444   ~MinixHostInfo();
    445 
    446   virtual bool useDriverDriver() const;
    447 
    448   virtual ToolChain *CreateToolChain(const ArgList &Args,
    449                                      const char *ArchName) const;
    450 };
    451 
    452 MinixHostInfo::~MinixHostInfo() {
    453   for (llvm::StringMap<ToolChain*>::iterator
    454          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it){
    455     delete it->second;
    456   }
    457 }
    458 
    459 bool MinixHostInfo::useDriverDriver() const {
    460   return false;
    461 }
    462 
    463 ToolChain *MinixHostInfo::CreateToolChain(const ArgList &Args,
    464                                             const char *ArchName) const {
    465   assert(!ArchName &&
    466          "Unexpected arch name on platform without driver driver support.");
    467 
    468   std::string Arch = getArchName();
    469   ArchName = Arch.c_str();
    470 
    471   ToolChain *&TC = ToolChains[ArchName];
    472   if (!TC) {
    473     llvm::Triple TCTriple(getTriple());
    474     TCTriple.setArchName(ArchName);
    475 
    476     TC = new toolchains::Minix(*this, TCTriple);
    477   }
    478 
    479   return TC;
    480 }
    481 
    482 // DragonFly Host Info
    483 
    484 /// DragonFlyHostInfo -  DragonFly host information implementation.
    485 class DragonFlyHostInfo : public HostInfo {
    486   /// Cache of tool chains we have created.
    487   mutable llvm::StringMap<ToolChain*> ToolChains;
    488 
    489 public:
    490   DragonFlyHostInfo(const Driver &D, const llvm::Triple& Triple)
    491     : HostInfo(D, Triple) {}
    492   ~DragonFlyHostInfo();
    493 
    494   virtual bool useDriverDriver() const;
    495 
    496   virtual ToolChain *CreateToolChain(const ArgList &Args,
    497                                      const char *ArchName) const;
    498 };
    499 
    500 DragonFlyHostInfo::~DragonFlyHostInfo() {
    501   for (llvm::StringMap<ToolChain*>::iterator
    502          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it)
    503     delete it->second;
    504 }
    505 
    506 bool DragonFlyHostInfo::useDriverDriver() const {
    507   return false;
    508 }
    509 
    510 ToolChain *DragonFlyHostInfo::CreateToolChain(const ArgList &Args,
    511                                               const char *ArchName) const {
    512   assert(!ArchName &&
    513          "Unexpected arch name on platform without driver driver support.");
    514 
    515   ToolChain *&TC = ToolChains[getArchName()];
    516 
    517   if (!TC) {
    518     llvm::Triple TCTriple(getTriple());
    519     TCTriple.setArchName(getArchName());
    520 
    521     TC = new toolchains::DragonFly(*this, TCTriple);
    522   }
    523 
    524   return TC;
    525 }
    526 
    527 // Linux Host Info
    528 
    529 /// LinuxHostInfo -  Linux host information implementation.
    530 class LinuxHostInfo : public HostInfo {
    531   /// Cache of tool chains we have created.
    532   mutable llvm::StringMap<ToolChain*> ToolChains;
    533 
    534 public:
    535   LinuxHostInfo(const Driver &D, const llvm::Triple& Triple)
    536     : HostInfo(D, Triple) {}
    537   ~LinuxHostInfo();
    538 
    539   virtual bool useDriverDriver() const;
    540 
    541   virtual ToolChain *CreateToolChain(const ArgList &Args,
    542                                      const char *ArchName) const;
    543 };
    544 
    545 LinuxHostInfo::~LinuxHostInfo() {
    546   for (llvm::StringMap<ToolChain*>::iterator
    547          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it)
    548     delete it->second;
    549 }
    550 
    551 bool LinuxHostInfo::useDriverDriver() const {
    552   return false;
    553 }
    554 
    555 ToolChain *LinuxHostInfo::CreateToolChain(const ArgList &Args,
    556                                           const char *ArchName) const {
    557 
    558   assert(!ArchName &&
    559          "Unexpected arch name on platform without driver driver support.");
    560 
    561   // Automatically handle some instances of -m32/-m64 we know about.
    562   std::string Arch = getArchName();
    563   ArchName = Arch.c_str();
    564   if (Arg *A = Args.getLastArg(options::OPT_m32, options::OPT_m64)) {
    565     if (Triple.getArch() == llvm::Triple::x86 ||
    566         Triple.getArch() == llvm::Triple::x86_64) {
    567       ArchName =
    568         (A->getOption().matches(options::OPT_m32)) ? "i386" : "x86_64";
    569     } else if (Triple.getArch() == llvm::Triple::ppc ||
    570                Triple.getArch() == llvm::Triple::ppc64) {
    571       ArchName =
    572         (A->getOption().matches(options::OPT_m32)) ? "powerpc" : "powerpc64";
    573     }
    574   }
    575 
    576   ToolChain *&TC = ToolChains[ArchName];
    577 
    578   if (!TC) {
    579     llvm::Triple TCTriple(getTriple());
    580     TCTriple.setArchName(ArchName);
    581 
    582     TC = new toolchains::Linux(*this, TCTriple);
    583   }
    584 
    585   return TC;
    586 }
    587 
    588 // Windows Host Info
    589 
    590 /// WindowsHostInfo - Host information to use on Microsoft Windows.
    591 class WindowsHostInfo : public HostInfo {
    592   /// Cache of tool chains we have created.
    593   mutable llvm::StringMap<ToolChain*> ToolChains;
    594 
    595 public:
    596   WindowsHostInfo(const Driver &D, const llvm::Triple& Triple);
    597   ~WindowsHostInfo();
    598 
    599   virtual bool useDriverDriver() const;
    600 
    601   virtual types::ID lookupTypeForExtension(const char *Ext) const {
    602     return types::lookupTypeForExtension(Ext);
    603   }
    604 
    605   virtual ToolChain *CreateToolChain(const ArgList &Args,
    606                                      const char *ArchName) const;
    607 };
    608 
    609 WindowsHostInfo::WindowsHostInfo(const Driver &D, const llvm::Triple& Triple)
    610   : HostInfo(D, Triple) {
    611 }
    612 
    613 WindowsHostInfo::~WindowsHostInfo() {
    614   for (llvm::StringMap<ToolChain*>::iterator
    615          it = ToolChains.begin(), ie = ToolChains.end(); it != ie; ++it)
    616     delete it->second;
    617 }
    618 
    619 bool WindowsHostInfo::useDriverDriver() const {
    620   return false;
    621 }
    622 
    623 ToolChain *WindowsHostInfo::CreateToolChain(const ArgList &Args,
    624                                             const char *ArchName) const {
    625   assert(!ArchName &&
    626          "Unexpected arch name on platform without driver driver support.");
    627 
    628   // Automatically handle some instances of -m32/-m64 we know about.
    629   std::string Arch = getArchName();
    630   ArchName = Arch.c_str();
    631   if (Arg *A = Args.getLastArg(options::OPT_m32, options::OPT_m64)) {
    632     if (Triple.getArch() == llvm::Triple::x86 ||
    633         Triple.getArch() == llvm::Triple::x86_64) {
    634       ArchName =
    635         (A->getOption().matches(options::OPT_m32)) ? "i386" : "x86_64";
    636     }
    637   }
    638 
    639   ToolChain *&TC = ToolChains[ArchName];
    640   if (!TC) {
    641     llvm::Triple TCTriple(getTriple());
    642     TCTriple.setArchName(ArchName);
    643 
    644     TC = new toolchains::Windows(*this, TCTriple);
    645   }
    646 
    647   return TC;
    648 }
    649 
    650 // FIXME: This is a placeholder.
    651 class MinGWHostInfo : public UnknownHostInfo {
    652 public:
    653   MinGWHostInfo(const Driver &D, const llvm::Triple& Triple);
    654 };
    655 
    656 MinGWHostInfo::MinGWHostInfo(const Driver &D, const llvm::Triple& Triple)
    657   : UnknownHostInfo(D, Triple) {}
    658 
    659 } // end anon namespace
    660 
    661 const HostInfo *
    662 clang::driver::createAuroraUXHostInfo(const Driver &D,
    663                                       const llvm::Triple& Triple){
    664   return new AuroraUXHostInfo(D, Triple);
    665 }
    666 
    667 const HostInfo *
    668 clang::driver::createDarwinHostInfo(const Driver &D,
    669                                     const llvm::Triple& Triple){
    670   return new DarwinHostInfo(D, Triple);
    671 }
    672 
    673 const HostInfo *
    674 clang::driver::createOpenBSDHostInfo(const Driver &D,
    675                                      const llvm::Triple& Triple) {
    676   return new OpenBSDHostInfo(D, Triple);
    677 }
    678 
    679 const HostInfo *
    680 clang::driver::createFreeBSDHostInfo(const Driver &D,
    681                                      const llvm::Triple& Triple) {
    682   return new FreeBSDHostInfo(D, Triple);
    683 }
    684 
    685 const HostInfo *
    686 clang::driver::createNetBSDHostInfo(const Driver &D,
    687                                      const llvm::Triple& Triple) {
    688   return new NetBSDHostInfo(D, Triple);
    689 }
    690 
    691 const HostInfo *
    692 clang::driver::createMinixHostInfo(const Driver &D,
    693                                      const llvm::Triple& Triple) {
    694   return new MinixHostInfo(D, Triple);
    695 }
    696 
    697 const HostInfo *
    698 clang::driver::createDragonFlyHostInfo(const Driver &D,
    699                                        const llvm::Triple& Triple) {
    700   return new DragonFlyHostInfo(D, Triple);
    701 }
    702 
    703 const HostInfo *
    704 clang::driver::createLinuxHostInfo(const Driver &D,
    705                                    const llvm::Triple& Triple) {
    706   return new LinuxHostInfo(D, Triple);
    707 }
    708 
    709 const HostInfo *
    710 clang::driver::createTCEHostInfo(const Driver &D,
    711                                    const llvm::Triple& Triple) {
    712   return new TCEHostInfo(D, Triple);
    713 }
    714 
    715 const HostInfo *
    716 clang::driver::createWindowsHostInfo(const Driver &D,
    717                                      const llvm::Triple& Triple) {
    718   return new WindowsHostInfo(D, Triple);
    719 }
    720 
    721 const HostInfo *
    722 clang::driver::createMinGWHostInfo(const Driver &D,
    723                                    const llvm::Triple& Triple) {
    724   return new MinGWHostInfo(D, Triple);
    725 }
    726 
    727 const HostInfo *
    728 clang::driver::createUnknownHostInfo(const Driver &D,
    729                                      const llvm::Triple& Triple) {
    730   return new UnknownHostInfo(D, Triple);
    731 }
    732