clang/lib/Driver/ToolChains/MinGW.cpp

   1 //===--- MinGW.cpp - MinGWToolChain Implementation ------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "MinGW.h"
  10 #include "CommonArgs.h"
  11 #include "clang/Config/config.h"
  12 #include "clang/Driver/Compilation.h"
  13 #include "clang/Driver/Driver.h"
  14 #include "clang/Driver/DriverDiagnostic.h"
  15 #include "clang/Driver/InputInfo.h"
  16 #include "clang/Driver/Options.h"
  17 #include "clang/Driver/SanitizerArgs.h"
  18 #include "llvm/Option/ArgList.h"
  19 #include "llvm/Support/FileSystem.h"
  20 #include "llvm/Support/Path.h"
  21 #include "llvm/Support/VirtualFileSystem.h"
  22 #include <system_error>
  23
  24 using namespace clang::diag;
  25 using namespace clang::driver;
  26 using namespace clang;
  27 using namespace llvm::opt;
  28
  29 /// MinGW Tools
  30 void tools::MinGW::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
  31                                            const InputInfo &Output,
  32                                            const InputInfoList &Inputs,
  33                                            const ArgList &Args,
  34                                            const char *LinkingOutput) const {
  35   claimNoWarnArgs(Args);
  36   ArgStringList CmdArgs;
  37
  38   if (getToolChain().getArch() == llvm::Triple::x86) {
  39     CmdArgs.push_back("--32");
  40   } else if (getToolChain().getArch() == llvm::Triple::x86_64) {
  41     CmdArgs.push_back("--64");
  42   }
  43
  44   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
  45
  46   CmdArgs.push_back("-o");
  47   CmdArgs.push_back(Output.getFilename());
  48
  49   for (const auto &II : Inputs)
  50     CmdArgs.push_back(II.getFilename());
  51
  52   const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
  53   C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
  54                                          Exec, CmdArgs, Inputs, Output));
  55
  56   if (Args.hasArg(options::OPT_gsplit_dwarf))
  57     SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output,
  58                    SplitDebugName(JA, Args, Inputs[0], Output));
  59 }
  60
  61 void tools::MinGW::Linker::AddLibGCC(const ArgList &Args,
  62                                      ArgStringList &CmdArgs) const {
  63   if (Args.hasArg(options::OPT_mthreads))
  64     CmdArgs.push_back("-lmingwthrd");
  65   CmdArgs.push_back("-lmingw32");
  66
  67   // Make use of compiler-rt if --rtlib option is used
  68   ToolChain::RuntimeLibType RLT = getToolChain().GetRuntimeLibType(Args);
  69   if (RLT == ToolChain::RLT_Libgcc) {
  70     bool Static = Args.hasArg(options::OPT_static_libgcc) ||
  71                   Args.hasArg(options::OPT_static);
  72     bool Shared = Args.hasArg(options::OPT_shared);
  73     bool CXX = getToolChain().getDriver().CCCIsCXX();
  74
  75     if (Static || (!CXX && !Shared)) {
  76       CmdArgs.push_back("-lgcc");
  77       CmdArgs.push_back("-lgcc_eh");
  78     } else {
  79       CmdArgs.push_back("-lgcc_s");
  80       CmdArgs.push_back("-lgcc");
  81     }
  82   } else {
  83     AddRunTimeLibs(getToolChain(), getToolChain().getDriver(), CmdArgs, Args);
  84   }
  85
  86   CmdArgs.push_back("-lmoldname");
  87   CmdArgs.push_back("-lmingwex");
  88   for (auto Lib : Args.getAllArgValues(options::OPT_l))
  89     if (StringRef(Lib).startswith("msvcr") ||
  90         StringRef(Lib).startswith("ucrt") ||
  91         StringRef(Lib).startswith("crtdll"))
  92       return;
  93   CmdArgs.push_back("-lmsvcrt");
  94 }
  95
  96 void tools::MinGW::Linker::ConstructJob(Compilation &C, const JobAction &JA,
  97                                         const InputInfo &Output,
  98                                         const InputInfoList &Inputs,
  99                                         const ArgList &Args,
 100                                         const char *LinkingOutput) const {
 101   const ToolChain &TC = getToolChain();
 102   const Driver &D = TC.getDriver();
 103   const SanitizerArgs &Sanitize = TC.getSanitizerArgs(Args);
 104
 105   ArgStringList CmdArgs;
 106
 107   // Silence warning for "clang -g foo.o -o foo"
 108   Args.ClaimAllArgs(options::OPT_g_Group);
 109   // and "clang -emit-llvm foo.o -o foo"
 110   Args.ClaimAllArgs(options::OPT_emit_llvm);
 111   // and for "clang -w foo.o -o foo". Other warning options are already
 112   // handled somewhere else.
 113   Args.ClaimAllArgs(options::OPT_w);
 114
 115   if (!D.SysRoot.empty())
 116     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
 117
 118   if (Args.hasArg(options::OPT_s))
 119     CmdArgs.push_back("-s");
 120
 121   CmdArgs.push_back("-m");
 122   switch (TC.getArch()) {
 123   case llvm::Triple::x86:
 124     CmdArgs.push_back("i386pe");
 125     break;
 126   case llvm::Triple::x86_64:
 127     CmdArgs.push_back("i386pep");
 128     break;
 129   case llvm::Triple::arm:
 130   case llvm::Triple::thumb:
 131     // FIXME: this is incorrect for WinCE
 132     CmdArgs.push_back("thumb2pe");
 133     break;
 134   case llvm::Triple::aarch64:
 135     CmdArgs.push_back("arm64pe");
 136     break;
 137   default:
 138     D.Diag(diag::err_target_unknown_triple) << TC.getEffectiveTriple().str();
 139   }
 140
 141   Arg *SubsysArg =
 142       Args.getLastArg(options::OPT_mwindows, options::OPT_mconsole);
 143   if (SubsysArg && SubsysArg->getOption().matches(options::OPT_mwindows)) {
 144     CmdArgs.push_back("--subsystem");
 145     CmdArgs.push_back("windows");
 146   } else if (SubsysArg &&
 147              SubsysArg->getOption().matches(options::OPT_mconsole)) {
 148     CmdArgs.push_back("--subsystem");
 149     CmdArgs.push_back("console");
 150   }
 151
 152   if (Args.hasArg(options::OPT_mdll))
 153     CmdArgs.push_back("--dll");
 154   else if (Args.hasArg(options::OPT_shared))
 155     CmdArgs.push_back("--shared");
 156   if (Args.hasArg(options::OPT_static))
 157     CmdArgs.push_back("-Bstatic");
 158   else
 159     CmdArgs.push_back("-Bdynamic");
 160   if (Args.hasArg(options::OPT_mdll) || Args.hasArg(options::OPT_shared)) {
 161     CmdArgs.push_back("-e");
 162     if (TC.getArch() == llvm::Triple::x86)
 163       CmdArgs.push_back("_DllMainCRTStartup@12");
 164     else
 165       CmdArgs.push_back("DllMainCRTStartup");
 166     CmdArgs.push_back("--enable-auto-image-base");
 167   }
 168
 169   if (Args.hasArg(options::OPT_Z_Xlinker__no_demangle))
 170     CmdArgs.push_back("--no-demangle");
 171
 172   if (!Args.hasFlag(options::OPT_fauto_import, options::OPT_fno_auto_import,
 173                     true))
 174     CmdArgs.push_back("--disable-auto-import");
 175
 176   if (Arg *A = Args.getLastArg(options::OPT_mguard_EQ)) {
 177     StringRef GuardArgs = A->getValue();
 178     if (GuardArgs == "none")
 179       CmdArgs.push_back("--no-guard-cf");
 180     else if (GuardArgs == "cf" || GuardArgs == "cf-nochecks")
 181       CmdArgs.push_back("--guard-cf");
 182     else
 183       D.Diag(diag::err_drv_unsupported_option_argument)
 184           << A->getSpelling() << GuardArgs;
 185   }
 186
 187   CmdArgs.push_back("-o");
 188   const char *OutputFile = Output.getFilename();
 189   // GCC implicitly adds an .exe extension if it is given an output file name
 190   // that lacks an extension.
 191   // GCC used to do this only when the compiler itself runs on windows, but
 192   // since GCC 8 it does the same when cross compiling as well.
 193   if (!llvm::sys::path::has_extension(OutputFile)) {
 194     CmdArgs.push_back(Args.MakeArgString(Twine(OutputFile) + ".exe"));
 195     OutputFile = CmdArgs.back();
 196   } else
 197     CmdArgs.push_back(OutputFile);
 198
 199   // FIXME: add -N, -n flags
 200   Args.AddLastArg(CmdArgs, options::OPT_r);
 201   Args.AddLastArg(CmdArgs, options::OPT_s);
 202   Args.AddLastArg(CmdArgs, options::OPT_t);
 203   Args.AddAllArgs(CmdArgs, options::OPT_u_Group);
 204
 205   // Add asan_dynamic as the first import lib before other libs. This allows
 206   // asan to be initialized as early as possible to increase its instrumentation
 207   // coverage to include other user DLLs which has not been built with asan.
 208   if (Sanitize.needsAsanRt() && !Args.hasArg(options::OPT_nostdlib) &&
 209       !Args.hasArg(options::OPT_nodefaultlibs)) {
 210     // MinGW always links against a shared MSVCRT.
 211     CmdArgs.push_back(
 212         TC.getCompilerRTArgString(Args, "asan_dynamic", ToolChain::FT_Shared));
 213   }
 214
 215   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
 216     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_mdll)) {
 217       CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("dllcrt2.o")));
 218     } else {
 219       if (Args.hasArg(options::OPT_municode))
 220         CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2u.o")));
 221       else
 222         CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2.o")));
 223     }
 224     if (Args.hasArg(options::OPT_pg))
 225       CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("gcrt2.o")));
 226     CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtbegin.o")));
 227   }
 228
 229   Args.AddAllArgs(CmdArgs, options::OPT_L);
 230   TC.AddFilePathLibArgs(Args, CmdArgs);
 231
 232   // Add the compiler-rt library directories if they exist to help
 233   // the linker find the various sanitizer, builtin, and profiling runtimes.
 234   for (const auto &LibPath : TC.getLibraryPaths()) {
 235     if (TC.getVFS().exists(LibPath))
 236       CmdArgs.push_back(Args.MakeArgString("-L" + LibPath));
 237   }
 238   auto CRTPath = TC.getCompilerRTPath();
 239   if (TC.getVFS().exists(CRTPath))
 240     CmdArgs.push_back(Args.MakeArgString("-L" + CRTPath));
 241
 242   AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
 243
 244   if (D.isUsingLTO()) {
 245     assert(!Inputs.empty() && "Must have at least one input.");
 246     addLTOOptions(TC, Args, CmdArgs, Output, Inputs[0],
 247                   D.getLTOMode() == LTOK_Thin);
 248   }
 249
 250   if (C.getDriver().IsFlangMode()) {
 251     addFortranRuntimeLibraryPath(TC, Args, CmdArgs);
 252     addFortranRuntimeLibs(TC, CmdArgs);
 253   }
 254
 255   // TODO: Add profile stuff here
 256
 257   if (TC.ShouldLinkCXXStdlib(Args)) {
 258     bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
 259                                !Args.hasArg(options::OPT_static);
 260     if (OnlyLibstdcxxStatic)
 261       CmdArgs.push_back("-Bstatic");
 262     TC.AddCXXStdlibLibArgs(Args, CmdArgs);
 263     if (OnlyLibstdcxxStatic)
 264       CmdArgs.push_back("-Bdynamic");
 265   }
 266
 267   bool HasWindowsApp = false;
 268   for (auto Lib : Args.getAllArgValues(options::OPT_l)) {
 269     if (Lib == "windowsapp") {
 270       HasWindowsApp = true;
 271       break;
 272     }
 273   }
 274
 275   if (!Args.hasArg(options::OPT_nostdlib)) {
 276     if (!Args.hasArg(options::OPT_nodefaultlibs)) {
 277       if (Args.hasArg(options::OPT_static))
 278         CmdArgs.push_back("--start-group");
 279
 280       if (Args.hasArg(options::OPT_fstack_protector) ||
 281           Args.hasArg(options::OPT_fstack_protector_strong) ||
 282           Args.hasArg(options::OPT_fstack_protector_all)) {
 283         CmdArgs.push_back("-lssp_nonshared");
 284         CmdArgs.push_back("-lssp");
 285       }
 286
 287       if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
 288                        options::OPT_fno_openmp, false)) {
 289         switch (TC.getDriver().getOpenMPRuntime(Args)) {
 290         case Driver::OMPRT_OMP:
 291           CmdArgs.push_back("-lomp");
 292           break;
 293         case Driver::OMPRT_IOMP5:
 294           CmdArgs.push_back("-liomp5md");
 295           break;
 296         case Driver::OMPRT_GOMP:
 297           CmdArgs.push_back("-lgomp");
 298           break;
 299         case Driver::OMPRT_Unknown:
 300           // Already diagnosed.
 301           break;
 302         }
 303       }
 304
 305       AddLibGCC(Args, CmdArgs);
 306
 307       if (Args.hasArg(options::OPT_pg))
 308         CmdArgs.push_back("-lgmon");
 309
 310       if (Args.hasArg(options::OPT_pthread))
 311         CmdArgs.push_back("-lpthread");
 312
 313       if (Sanitize.needsAsanRt()) {
 314         // MinGW always links against a shared MSVCRT.
 315         CmdArgs.push_back(TC.getCompilerRTArgString(Args, "asan_dynamic",
 316                                                     ToolChain::FT_Shared));
 317         CmdArgs.push_back(
 318             TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
 319         CmdArgs.push_back("--require-defined");
 320         CmdArgs.push_back(TC.getArch() == llvm::Triple::x86
 321                               ? "___asan_seh_interceptor"
 322                               : "__asan_seh_interceptor");
 323         // Make sure the linker consider all object files from the dynamic
 324         // runtime thunk.
 325         CmdArgs.push_back("--whole-archive");
 326         CmdArgs.push_back(
 327             TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
 328         CmdArgs.push_back("--no-whole-archive");
 329       }
 330
 331       TC.addProfileRTLibs(Args, CmdArgs);
 332
 333       if (!HasWindowsApp) {
 334         // Add system libraries. If linking to libwindowsapp.a, that import
 335         // library replaces all these and we shouldn't accidentally try to
 336         // link to the normal desktop mode dlls.
 337         if (Args.hasArg(options::OPT_mwindows)) {
 338           CmdArgs.push_back("-lgdi32");
 339           CmdArgs.push_back("-lcomdlg32");
 340         }
 341         CmdArgs.push_back("-ladvapi32");
 342         CmdArgs.push_back("-lshell32");
 343         CmdArgs.push_back("-luser32");
 344         CmdArgs.push_back("-lkernel32");
 345       }
 346
 347       if (Args.hasArg(options::OPT_static)) {
 348         CmdArgs.push_back("--end-group");
 349       } else {
 350         AddLibGCC(Args, CmdArgs);
 351         if (!HasWindowsApp)
 352           CmdArgs.push_back("-lkernel32");
 353       }
 354     }
 355
 356     if (!Args.hasArg(options::OPT_nostartfiles)) {
 357       // Add crtfastmath.o if available and fast math is enabled.
 358       TC.addFastMathRuntimeIfAvailable(Args, CmdArgs);
 359
 360       CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtend.o")));
 361     }
 362   }
 363   const char *Exec = Args.MakeArgString(TC.GetLinkerPath());
 364   C.addCommand(std::make_unique<Command>(JA, *this,
 365                                          ResponseFileSupport::AtFileUTF8(),
 366                                          Exec, CmdArgs, Inputs, Output));
 367 }
 368
 369 static bool isCrossCompiling(const llvm::Triple &T, bool RequireArchMatch) {
 370   llvm::Triple HostTriple(llvm::Triple::normalize(LLVM_HOST_TRIPLE));
 371   if (HostTriple.getOS() != llvm::Triple::Win32)
 372     return true;
 373   if (RequireArchMatch && HostTriple.getArch() != T.getArch())
 374     return true;
 375   return false;
 376 }
 377
 378 // Simplified from Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple.
 379 static bool findGccVersion(StringRef LibDir, std::string &GccLibDir,
 380                            std::string &Ver,
 381                            toolchains::Generic_GCC::GCCVersion &Version) {
 382   Version = toolchains::Generic_GCC::GCCVersion::Parse("0.0.0");
 383   std::error_code EC;
 384   for (llvm::sys::fs::directory_iterator LI(LibDir, EC), LE; !EC && LI != LE;
 385        LI = LI.increment(EC)) {
 386     StringRef VersionText = llvm::sys::path::filename(LI->path());
 387     auto CandidateVersion =
 388         toolchains::Generic_GCC::GCCVersion::Parse(VersionText);
 389     if (CandidateVersion.Major == -1)
 390       continue;
 391     if (CandidateVersion <= Version)
 392       continue;
 393     Version = CandidateVersion;
 394     Ver = std::string(VersionText);
 395     GccLibDir = LI->path();
 396   }
 397   return Ver.size();
 398 }
 399
 400 static llvm::Triple getLiteralTriple(const Driver &D, const llvm::Triple &T) {
 401   llvm::Triple LiteralTriple(D.getTargetTriple());
 402   // The arch portion of the triple may be overridden by -m32/-m64.
 403   LiteralTriple.setArchName(T.getArchName());
 404   return LiteralTriple;
 405 }
 406
 407 void toolchains::MinGW::findGccLibDir(const llvm::Triple &LiteralTriple) {
 408   llvm::SmallVector<llvm::SmallString<32>, 5> SubdirNames;
 409   SubdirNames.emplace_back(LiteralTriple.str());
 410   SubdirNames.emplace_back(getTriple().str());
 411   SubdirNames.emplace_back(getTriple().getArchName());
 412   SubdirNames.back() += "-w64-mingw32";
 413   SubdirNames.emplace_back(getTriple().getArchName());
 414   SubdirNames.back() += "-w64-mingw32ucrt";
 415   SubdirNames.emplace_back("mingw32");
 416   if (SubdirName.empty()) {
 417     SubdirName = getTriple().getArchName();
 418     SubdirName += "-w64-mingw32";
 419   }
 420   // lib: Arch Linux, Ubuntu, Windows
 421   // lib64: openSUSE Linux
 422   for (StringRef CandidateLib : {"lib", "lib64"}) {
 423     for (StringRef CandidateSysroot : SubdirNames) {
 424       llvm::SmallString<1024> LibDir(Base);
 425       llvm::sys::path::append(LibDir, CandidateLib, "gcc", CandidateSysroot);
 426       if (findGccVersion(LibDir, GccLibDir, Ver, GccVer)) {
 427         SubdirName = std::string(CandidateSysroot);
 428         return;
 429       }
 430     }
 431   }
 432 }
 433
 434 static llvm::ErrorOr<std::string> findGcc(const llvm::Triple &LiteralTriple,
 435                                           const llvm::Triple &T) {
 436   llvm::SmallVector<llvm::SmallString<32>, 5> Gccs;
 437   Gccs.emplace_back(LiteralTriple.str());
 438   Gccs.back() += "-gcc";
 439   Gccs.emplace_back(T.str());
 440   Gccs.back() += "-gcc";
 441   Gccs.emplace_back(T.getArchName());
 442   Gccs.back() += "-w64-mingw32-gcc";
 443   Gccs.emplace_back(T.getArchName());
 444   Gccs.back() += "-w64-mingw32ucrt-gcc";
 445   Gccs.emplace_back("mingw32-gcc");
 446   // Please do not add "gcc" here
 447   for (StringRef CandidateGcc : Gccs)
 448     if (llvm::ErrorOr<std::string> GPPName = llvm::sys::findProgramByName(CandidateGcc))
 449       return GPPName;
 450   return make_error_code(std::errc::no_such_file_or_directory);
 451 }
 452
 453 static llvm::ErrorOr<std::string>
 454 findClangRelativeSysroot(const Driver &D, const llvm::Triple &LiteralTriple,
 455                          const llvm::Triple &T, std::string &SubdirName) {
 456   llvm::SmallVector<llvm::SmallString<32>, 4> Subdirs;
 457   Subdirs.emplace_back(LiteralTriple.str());
 458   Subdirs.emplace_back(T.str());
 459   Subdirs.emplace_back(T.getArchName());
 460   Subdirs.back() += "-w64-mingw32";
 461   Subdirs.emplace_back(T.getArchName());
 462   Subdirs.back() += "-w64-mingw32ucrt";
 463   StringRef ClangRoot = llvm::sys::path::parent_path(D.getInstalledDir());
 464   StringRef Sep = llvm::sys::path::get_separator();
 465   for (StringRef CandidateSubdir : Subdirs) {
 466     if (llvm::sys::fs::is_directory(ClangRoot + Sep + CandidateSubdir)) {
 467       SubdirName = std::string(CandidateSubdir);
 468       return (ClangRoot + Sep + CandidateSubdir).str();
 469     }
 470   }
 471   return make_error_code(std::errc::no_such_file_or_directory);
 472 }
 473
 474 toolchains::MinGW::MinGW(const Driver &D, const llvm::Triple &Triple,
 475                          const ArgList &Args)
 476     : ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args),
 477       RocmInstallation(D, Triple, Args) {
 478   getProgramPaths().push_back(getDriver().getInstalledDir());
 479
 480   // The sequence for detecting a sysroot here should be kept in sync with
 481   // the testTriple function below.
 482   llvm::Triple LiteralTriple = getLiteralTriple(D, getTriple());
 483   if (getDriver().SysRoot.size())
 484     Base = getDriver().SysRoot;
 485   // Look for <clang-bin>/../<triplet>; if found, use <clang-bin>/.. as the
 486   // base as it could still be a base for a gcc setup with libgcc.
 487   else if (llvm::ErrorOr<std::string> TargetSubdir = findClangRelativeSysroot(
 488                getDriver(), LiteralTriple, getTriple(), SubdirName))
 489     Base = std::string(llvm::sys::path::parent_path(TargetSubdir.get()));
 490   else if (llvm::ErrorOr<std::string> GPPName =
 491                findGcc(LiteralTriple, getTriple()))
 492     Base = std::string(llvm::sys::path::parent_path(
 493         llvm::sys::path::parent_path(GPPName.get())));
 494   else
 495     Base = std::string(
 496         llvm::sys::path::parent_path(getDriver().getInstalledDir()));
 497
 498   Base += llvm::sys::path::get_separator();
 499   findGccLibDir(LiteralTriple);
 500   TripleDirName = SubdirName;
 501   // GccLibDir must precede Base/lib so that the
 502   // correct crtbegin.o ,cetend.o would be found.
 503   getFilePaths().push_back(GccLibDir);
 504
 505   // openSUSE/Fedora
 506   std::string CandidateSubdir = SubdirName + "/sys-root/mingw";
 507   if (getDriver().getVFS().exists(Base + CandidateSubdir))
 508     SubdirName = CandidateSubdir;
 509
 510   getFilePaths().push_back(
 511       (Base + SubdirName + llvm::sys::path::get_separator() + "lib").str());
 512
 513   // Gentoo
 514   getFilePaths().push_back(
 515       (Base + SubdirName + llvm::sys::path::get_separator() + "mingw/lib").str());
 516
 517   // Only include <base>/lib if we're not cross compiling (not even for
 518   // windows->windows to a different arch), or if the sysroot has been set
 519   // (where we presume the user has pointed it at an arch specific
 520   // subdirectory).
 521   if (!::isCrossCompiling(getTriple(), /*RequireArchMatch=*/true) ||
 522       getDriver().SysRoot.size())
 523     getFilePaths().push_back(Base + "lib");
 524
 525   NativeLLVMSupport =
 526       Args.getLastArgValue(options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER)
 527           .equals_insensitive("lld");
 528 }
 529
 530 Tool *toolchains::MinGW::getTool(Action::ActionClass AC) const {
 531   switch (AC) {
 532   case Action::PreprocessJobClass:
 533     if (!Preprocessor)
 534       Preprocessor.reset(new tools::gcc::Preprocessor(*this));
 535     return Preprocessor.get();
 536   case Action::CompileJobClass:
 537     if (!Compiler)
 538       Compiler.reset(new tools::gcc::Compiler(*this));
 539     return Compiler.get();
 540   default:
 541     return ToolChain::getTool(AC);
 542   }
 543 }
 544
 545 Tool *toolchains::MinGW::buildAssembler() const {
 546   return new tools::MinGW::Assembler(*this);
 547 }
 548
 549 Tool *toolchains::MinGW::buildLinker() const {
 550   return new tools::MinGW::Linker(*this);
 551 }
 552
 553 bool toolchains::MinGW::HasNativeLLVMSupport() const {
 554   return NativeLLVMSupport;
 555 }
 556
 557 ToolChain::UnwindTableLevel
 558 toolchains::MinGW::getDefaultUnwindTableLevel(const ArgList &Args) const {
 559   Arg *ExceptionArg = Args.getLastArg(options::OPT_fsjlj_exceptions,
 560                                       options::OPT_fseh_exceptions,
 561                                       options::OPT_fdwarf_exceptions);
 562   if (ExceptionArg &&
 563       ExceptionArg->getOption().matches(options::OPT_fseh_exceptions))
 564     return UnwindTableLevel::Asynchronous;
 565
 566   if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::arm ||
 567       getArch() == llvm::Triple::thumb || getArch() == llvm::Triple::aarch64)
 568     return UnwindTableLevel::Asynchronous;
 569   return UnwindTableLevel::None;
 570 }
 571
 572 bool toolchains::MinGW::isPICDefault() const {
 573   return getArch() == llvm::Triple::x86_64 ||
 574          getArch() == llvm::Triple::aarch64;
 575 }
 576
 577 bool toolchains::MinGW::isPIEDefault(const llvm::opt::ArgList &Args) const {
 578   return false;
 579 }
 580
 581 bool toolchains::MinGW::isPICDefaultForced() const { return true; }
 582
 583 llvm::ExceptionHandling
 584 toolchains::MinGW::GetExceptionModel(const ArgList &Args) const {
 585   if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::aarch64 ||
 586       getArch() == llvm::Triple::arm || getArch() == llvm::Triple::thumb)
 587     return llvm::ExceptionHandling::WinEH;
 588   return llvm::ExceptionHandling::DwarfCFI;
 589 }
 590
 591 SanitizerMask toolchains::MinGW::getSupportedSanitizers() const {
 592   SanitizerMask Res = ToolChain::getSupportedSanitizers();
 593   Res |= SanitizerKind::Address;
 594   Res |= SanitizerKind::PointerCompare;
 595   Res |= SanitizerKind::PointerSubtract;
 596   Res |= SanitizerKind::Vptr;
 597   return Res;
 598 }
 599
 600 void toolchains::MinGW::AddCudaIncludeArgs(const ArgList &DriverArgs,
 601                                            ArgStringList &CC1Args) const {
 602   CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
 603 }
 604
 605 void toolchains::MinGW::AddHIPIncludeArgs(const ArgList &DriverArgs,
 606                                           ArgStringList &CC1Args) const {
 607   RocmInstallation.AddHIPIncludeArgs(DriverArgs, CC1Args);
 608 }
 609
 610 void toolchains::MinGW::printVerboseInfo(raw_ostream &OS) const {
 611   CudaInstallation.print(OS);
 612   RocmInstallation.print(OS);
 613 }
 614
 615 // Include directories for various hosts:
 616
 617 // Windows, mingw.org
 618 // c:\mingw\lib\gcc\mingw32\4.8.1\include\c++
 619 // c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\mingw32
 620 // c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\backward
 621 // c:\mingw\include
 622 // c:\mingw\mingw32\include
 623
 624 // Windows, mingw-w64 mingw-builds
 625 // c:\mingw32\i686-w64-mingw32\include
 626 // c:\mingw32\i686-w64-mingw32\include\c++
 627 // c:\mingw32\i686-w64-mingw32\include\c++\i686-w64-mingw32
 628 // c:\mingw32\i686-w64-mingw32\include\c++\backward
 629
 630 // Windows, mingw-w64 msys2
 631 // c:\msys64\mingw32\include
 632 // c:\msys64\mingw32\i686-w64-mingw32\include
 633 // c:\msys64\mingw32\include\c++\4.9.2
 634 // c:\msys64\mingw32\include\c++\4.9.2\i686-w64-mingw32
 635 // c:\msys64\mingw32\include\c++\4.9.2\backward
 636
 637 // openSUSE
 638 // /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++
 639 // /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/x86_64-w64-mingw32
 640 // /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/backward
 641 // /usr/x86_64-w64-mingw32/sys-root/mingw/include
 642
 643 // Arch Linux
 644 // /usr/i686-w64-mingw32/include/c++/5.1.0
 645 // /usr/i686-w64-mingw32/include/c++/5.1.0/i686-w64-mingw32
 646 // /usr/i686-w64-mingw32/include/c++/5.1.0/backward
 647 // /usr/i686-w64-mingw32/include
 648
 649 // Ubuntu
 650 // /usr/include/c++/4.8
 651 // /usr/include/c++/4.8/x86_64-w64-mingw32
 652 // /usr/include/c++/4.8/backward
 653 // /usr/x86_64-w64-mingw32/include
 654
 655 // Fedora
 656 // /usr/x86_64-w64-mingw32ucrt/sys-root/mingw/include/c++/x86_64-w64-mingw32ucrt
 657 // /usr/x86_64-w64-mingw32ucrt/sys-root/mingw/include/c++/backward
 658 // /usr/x86_64-w64-mingw32ucrt/sys-root/mingw/include
 659 // /usr/lib/gcc/x86_64-w64-mingw32ucrt/12.2.1/include-fixed
 660
 661 void toolchains::MinGW::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
 662                                                   ArgStringList &CC1Args) const {
 663   if (DriverArgs.hasArg(options::OPT_nostdinc))
 664     return;
 665
 666   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
 667     SmallString<1024> P(getDriver().ResourceDir);
 668     llvm::sys::path::append(P, "include");
 669     addSystemInclude(DriverArgs, CC1Args, P.str());
 670   }
 671
 672   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
 673     return;
 674
 675   addSystemInclude(DriverArgs, CC1Args,
 676                    Base + SubdirName + llvm::sys::path::get_separator() +
 677                        "include");
 678
 679   // Gentoo
 680   addSystemInclude(DriverArgs, CC1Args,
 681                    Base + SubdirName + llvm::sys::path::get_separator() + "usr/include");
 682
 683   // Only include <base>/include if we're not cross compiling (but do allow it
 684   // if we're on Windows and building for Windows on another architecture),
 685   // or if the sysroot has been set (where we presume the user has pointed it
 686   // at an arch specific subdirectory).
 687   if (!::isCrossCompiling(getTriple(), /*RequireArchMatch=*/false) ||
 688       getDriver().SysRoot.size())
 689     addSystemInclude(DriverArgs, CC1Args, Base + "include");
 690 }
 691
 692 void toolchains::MinGW::addClangTargetOptions(
 693     const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
 694     Action::OffloadKind DeviceOffloadKind) const {
 695   if (Arg *A = DriverArgs.getLastArg(options::OPT_mguard_EQ)) {
 696     StringRef GuardArgs = A->getValue();
 697     if (GuardArgs == "none") {
 698       // Do nothing.
 699     } else if (GuardArgs == "cf") {
 700       // Emit CFG instrumentation and the table of address-taken functions.
 701       CC1Args.push_back("-cfguard");
 702     } else if (GuardArgs == "cf-nochecks") {
 703       // Emit only the table of address-taken functions.
 704       CC1Args.push_back("-cfguard-no-checks");
 705     } else {
 706       getDriver().Diag(diag::err_drv_unsupported_option_argument)
 707           << A->getSpelling() << GuardArgs;
 708     }
 709   }
 710
 711   CC1Args.push_back("-fno-use-init-array");
 712
 713   for (auto Opt : {options::OPT_mthreads, options::OPT_mwindows,
 714                    options::OPT_mconsole, options::OPT_mdll}) {
 715     if (Arg *A = DriverArgs.getLastArgNoClaim(Opt))
 716       A->ignoreTargetSpecific();
 717   }
 718 }
 719
 720 void toolchains::MinGW::AddClangCXXStdlibIncludeArgs(
 721     const ArgList &DriverArgs, ArgStringList &CC1Args) const {
 722   if (DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdlibinc,
 723                         options::OPT_nostdincxx))
 724     return;
 725
 726   StringRef Slash = llvm::sys::path::get_separator();
 727
 728   switch (GetCXXStdlibType(DriverArgs)) {
 729   case ToolChain::CST_Libcxx: {
 730     std::string TargetDir = (Base + "include" + Slash + getTripleString() +
 731                              Slash + "c++" + Slash + "v1")
 732                                 .str();
 733     if (getDriver().getVFS().exists(TargetDir))
 734       addSystemInclude(DriverArgs, CC1Args, TargetDir);
 735     addSystemInclude(DriverArgs, CC1Args,
 736                      Base + SubdirName + Slash + "include" + Slash + "c++" +
 737                          Slash + "v1");
 738     addSystemInclude(DriverArgs, CC1Args,
 739                      Base + "include" + Slash + "c++" + Slash + "v1");
 740     break;
 741   }
 742
 743   case ToolChain::CST_Libstdcxx:
 744     llvm::SmallVector<llvm::SmallString<1024>, 7> CppIncludeBases;
 745     CppIncludeBases.emplace_back(Base);
 746     llvm::sys::path::append(CppIncludeBases[0], SubdirName, "include", "c++");
 747     CppIncludeBases.emplace_back(Base);
 748     llvm::sys::path::append(CppIncludeBases[1], SubdirName, "include", "c++",
 749                             Ver);
 750     CppIncludeBases.emplace_back(Base);
 751     llvm::sys::path::append(CppIncludeBases[2], "include", "c++", Ver);
 752     CppIncludeBases.emplace_back(GccLibDir);
 753     llvm::sys::path::append(CppIncludeBases[3], "include", "c++");
 754     CppIncludeBases.emplace_back(GccLibDir);
 755     llvm::sys::path::append(CppIncludeBases[4], "include",
 756                             "g++-v" + GccVer.Text);
 757     CppIncludeBases.emplace_back(GccLibDir);
 758     llvm::sys::path::append(CppIncludeBases[5], "include",
 759                             "g++-v" + GccVer.MajorStr + "." + GccVer.MinorStr);
 760     CppIncludeBases.emplace_back(GccLibDir);
 761     llvm::sys::path::append(CppIncludeBases[6], "include",
 762                             "g++-v" + GccVer.MajorStr);
 763     for (auto &CppIncludeBase : CppIncludeBases) {
 764       addSystemInclude(DriverArgs, CC1Args, CppIncludeBase);
 765       CppIncludeBase += Slash;
 766       addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + TripleDirName);
 767       addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + "backward");
 768     }
 769     break;
 770   }
 771 }
 772
 773 static bool testTriple(const Driver &D, const llvm::Triple &Triple,
 774                        const ArgList &Args) {
 775   // If an explicit sysroot is set, that will be used and we shouldn't try to
 776   // detect anything else.
 777   std::string SubdirName;
 778   if (D.SysRoot.size())
 779     return true;
 780   llvm::Triple LiteralTriple = getLiteralTriple(D, Triple);
 781   if (llvm::ErrorOr<std::string> TargetSubdir =
 782           findClangRelativeSysroot(D, LiteralTriple, Triple, SubdirName))
 783     return true;
 784   if (llvm::ErrorOr<std::string> GPPName = findGcc(LiteralTriple, Triple))
 785     return true;
 786   // If we neither found a colocated sysroot or a matching gcc executable,
 787   // conclude that we can't know if this is the correct spelling of the triple.
 788   return false;
 789 }
 790
 791 static llvm::Triple adjustTriple(const Driver &D, const llvm::Triple &Triple,
 792                                  const ArgList &Args) {
 793   // First test if the original triple can find a sysroot with the triple
 794   // name.
 795   if (testTriple(D, Triple, Args))
 796     return Triple;
 797   llvm::SmallVector<llvm::StringRef, 3> Archs;
 798   // If not, test a couple other possible arch names that might be what was
 799   // intended.
 800   if (Triple.getArch() == llvm::Triple::x86) {
 801     Archs.emplace_back("i386");
 802     Archs.emplace_back("i586");
 803     Archs.emplace_back("i686");
 804   } else if (Triple.getArch() == llvm::Triple::arm ||
 805              Triple.getArch() == llvm::Triple::thumb) {
 806     Archs.emplace_back("armv7");
 807   }
 808   for (auto A : Archs) {
 809     llvm::Triple TestTriple(Triple);
 810     TestTriple.setArchName(A);
 811     if (testTriple(D, TestTriple, Args))
 812       return TestTriple;
 813   }
 814   // If none was found, just proceed with the original value.
 815   return Triple;
 816 }
 817
 818 void toolchains::MinGW::fixTripleArch(const Driver &D, llvm::Triple &Triple,
 819                                       const ArgList &Args) {
 820   if (Triple.getArch() == llvm::Triple::x86 ||
 821       Triple.getArch() == llvm::Triple::arm ||
 822       Triple.getArch() == llvm::Triple::thumb)
 823     Triple = adjustTriple(D, Triple, Args);
 824 }