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
24using namespace clang::diag;
25using namespace clang::driver;
26using namespace clang;
27using namespace llvm::opt;
28
29/// MinGW Tools
30void 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
61void 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).starts_with("msvcr") ||
90        StringRef(Lib).starts_with("ucrt") ||
91        StringRef(Lib).starts_with("crtdll"))
92      return;
93  CmdArgs.push_back("-lmsvcrt");
94}
95
96void 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, Args, 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
369static 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.
379static 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
400static 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
407void 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
434static 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
453static llvm::ErrorOr<std::string>
454findClangRelativeSysroot(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
474static bool looksLikeMinGWSysroot(const std::string &Directory) {
475  StringRef Sep = llvm::sys::path::get_separator();
476  if (!llvm::sys::fs::exists(Directory + Sep + "include" + Sep + "_mingw.h"))
477    return false;
478  if (!llvm::sys::fs::exists(Directory + Sep + "lib" + Sep + "libkernel32.a"))
479    return false;
480  return true;
481}
482
483toolchains::MinGW::MinGW(const Driver &D, const llvm::Triple &Triple,
484                         const ArgList &Args)
485    : ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args),
486      RocmInstallation(D, Triple, Args) {
487  getProgramPaths().push_back(getDriver().getInstalledDir());
488
489  std::string InstallBase =
490      std::string(llvm::sys::path::parent_path(getDriver().getInstalledDir()));
491  // The sequence for detecting a sysroot here should be kept in sync with
492  // the testTriple function below.
493  llvm::Triple LiteralTriple = getLiteralTriple(D, getTriple());
494  if (getDriver().SysRoot.size())
495    Base = getDriver().SysRoot;
496  // Look for <clang-bin>/../<triplet>; if found, use <clang-bin>/.. as the
497  // base as it could still be a base for a gcc setup with libgcc.
498  else if (llvm::ErrorOr<std::string> TargetSubdir = findClangRelativeSysroot(
499               getDriver(), LiteralTriple, getTriple(), SubdirName))
500    Base = std::string(llvm::sys::path::parent_path(TargetSubdir.get()));
501  // If the install base of Clang seems to have mingw sysroot files directly
502  // in the toplevel include and lib directories, use this as base instead of
503  // looking for a triple prefixed GCC in the path.
504  else if (looksLikeMinGWSysroot(InstallBase))
505    Base = InstallBase;
506  else if (llvm::ErrorOr<std::string> GPPName =
507               findGcc(LiteralTriple, getTriple()))
508    Base = std::string(llvm::sys::path::parent_path(
509        llvm::sys::path::parent_path(GPPName.get())));
510  else
511    Base = InstallBase;
512
513  Base += llvm::sys::path::get_separator();
514  findGccLibDir(LiteralTriple);
515  TripleDirName = SubdirName;
516  // GccLibDir must precede Base/lib so that the
517  // correct crtbegin.o ,cetend.o would be found.
518  getFilePaths().push_back(GccLibDir);
519
520  // openSUSE/Fedora
521  std::string CandidateSubdir = SubdirName + "/sys-root/mingw";
522  if (getDriver().getVFS().exists(Base + CandidateSubdir))
523    SubdirName = CandidateSubdir;
524
525  getFilePaths().push_back(
526      (Base + SubdirName + llvm::sys::path::get_separator() + "lib").str());
527
528  // Gentoo
529  getFilePaths().push_back(
530      (Base + SubdirName + llvm::sys::path::get_separator() + "mingw/lib").str());
531
532  // Only include <base>/lib if we're not cross compiling (not even for
533  // windows->windows to a different arch), or if the sysroot has been set
534  // (where we presume the user has pointed it at an arch specific
535  // subdirectory).
536  if (!::isCrossCompiling(getTriple(), /*RequireArchMatch=*/true) ||
537      getDriver().SysRoot.size())
538    getFilePaths().push_back(Base + "lib");
539
540  NativeLLVMSupport =
541      Args.getLastArgValue(options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER)
542          .equals_insensitive("lld");
543}
544
545Tool *toolchains::MinGW::getTool(Action::ActionClass AC) const {
546  switch (AC) {
547  case Action::PreprocessJobClass:
548    if (!Preprocessor)
549      Preprocessor.reset(new tools::gcc::Preprocessor(*this));
550    return Preprocessor.get();
551  case Action::CompileJobClass:
552    if (!Compiler)
553      Compiler.reset(new tools::gcc::Compiler(*this));
554    return Compiler.get();
555  default:
556    return ToolChain::getTool(AC);
557  }
558}
559
560Tool *toolchains::MinGW::buildAssembler() const {
561  return new tools::MinGW::Assembler(*this);
562}
563
564Tool *toolchains::MinGW::buildLinker() const {
565  return new tools::MinGW::Linker(*this);
566}
567
568bool toolchains::MinGW::HasNativeLLVMSupport() const {
569  return NativeLLVMSupport;
570}
571
572ToolChain::UnwindTableLevel
573toolchains::MinGW::getDefaultUnwindTableLevel(const ArgList &Args) const {
574  Arg *ExceptionArg = Args.getLastArg(options::OPT_fsjlj_exceptions,
575                                      options::OPT_fseh_exceptions,
576                                      options::OPT_fdwarf_exceptions);
577  if (ExceptionArg &&
578      ExceptionArg->getOption().matches(options::OPT_fseh_exceptions))
579    return UnwindTableLevel::Asynchronous;
580
581  if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::arm ||
582      getArch() == llvm::Triple::thumb || getArch() == llvm::Triple::aarch64)
583    return UnwindTableLevel::Asynchronous;
584  return UnwindTableLevel::None;
585}
586
587bool toolchains::MinGW::isPICDefault() const {
588  return getArch() == llvm::Triple::x86_64 ||
589         getArch() == llvm::Triple::aarch64;
590}
591
592bool toolchains::MinGW::isPIEDefault(const llvm::opt::ArgList &Args) const {
593  return false;
594}
595
596bool toolchains::MinGW::isPICDefaultForced() const { return true; }
597
598llvm::ExceptionHandling
599toolchains::MinGW::GetExceptionModel(const ArgList &Args) const {
600  if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::aarch64 ||
601      getArch() == llvm::Triple::arm || getArch() == llvm::Triple::thumb)
602    return llvm::ExceptionHandling::WinEH;
603  return llvm::ExceptionHandling::DwarfCFI;
604}
605
606SanitizerMask toolchains::MinGW::getSupportedSanitizers() const {
607  SanitizerMask Res = ToolChain::getSupportedSanitizers();
608  Res |= SanitizerKind::Address;
609  Res |= SanitizerKind::PointerCompare;
610  Res |= SanitizerKind::PointerSubtract;
611  Res |= SanitizerKind::Vptr;
612  return Res;
613}
614
615void toolchains::MinGW::AddCudaIncludeArgs(const ArgList &DriverArgs,
616                                           ArgStringList &CC1Args) const {
617  CudaInstallation->AddCudaIncludeArgs(DriverArgs, CC1Args);
618}
619
620void toolchains::MinGW::AddHIPIncludeArgs(const ArgList &DriverArgs,
621                                          ArgStringList &CC1Args) const {
622  RocmInstallation->AddHIPIncludeArgs(DriverArgs, CC1Args);
623}
624
625void toolchains::MinGW::printVerboseInfo(raw_ostream &OS) const {
626  CudaInstallation->print(OS);
627  RocmInstallation->print(OS);
628}
629
630// Include directories for various hosts:
631
632// Windows, mingw.org
633// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++
634// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\mingw32
635// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\backward
636// c:\mingw\include
637// c:\mingw\mingw32\include
638
639// Windows, mingw-w64 mingw-builds
640// c:\mingw32\i686-w64-mingw32\include
641// c:\mingw32\i686-w64-mingw32\include\c++
642// c:\mingw32\i686-w64-mingw32\include\c++\i686-w64-mingw32
643// c:\mingw32\i686-w64-mingw32\include\c++\backward
644
645// Windows, mingw-w64 msys2
646// c:\msys64\mingw32\include
647// c:\msys64\mingw32\i686-w64-mingw32\include
648// c:\msys64\mingw32\include\c++\4.9.2
649// c:\msys64\mingw32\include\c++\4.9.2\i686-w64-mingw32
650// c:\msys64\mingw32\include\c++\4.9.2\backward
651
652// openSUSE
653// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++
654// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/x86_64-w64-mingw32
655// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/backward
656// /usr/x86_64-w64-mingw32/sys-root/mingw/include
657
658// Arch Linux
659// /usr/i686-w64-mingw32/include/c++/5.1.0
660// /usr/i686-w64-mingw32/include/c++/5.1.0/i686-w64-mingw32
661// /usr/i686-w64-mingw32/include/c++/5.1.0/backward
662// /usr/i686-w64-mingw32/include
663
664// Ubuntu
665// /usr/include/c++/4.8
666// /usr/include/c++/4.8/x86_64-w64-mingw32
667// /usr/include/c++/4.8/backward
668// /usr/x86_64-w64-mingw32/include
669
670// Fedora
671// /usr/x86_64-w64-mingw32ucrt/sys-root/mingw/include/c++/x86_64-w64-mingw32ucrt
672// /usr/x86_64-w64-mingw32ucrt/sys-root/mingw/include/c++/backward
673// /usr/x86_64-w64-mingw32ucrt/sys-root/mingw/include
674// /usr/lib/gcc/x86_64-w64-mingw32ucrt/12.2.1/include-fixed
675
676void toolchains::MinGW::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
677                                                  ArgStringList &CC1Args) const {
678  if (DriverArgs.hasArg(options::OPT_nostdinc))
679    return;
680
681  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
682    SmallString<1024> P(getDriver().ResourceDir);
683    llvm::sys::path::append(P, "include");
684    addSystemInclude(DriverArgs, CC1Args, P.str());
685  }
686
687  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
688    return;
689
690  addSystemInclude(DriverArgs, CC1Args,
691                   Base + SubdirName + llvm::sys::path::get_separator() +
692                       "include");
693
694  // Gentoo
695  addSystemInclude(DriverArgs, CC1Args,
696                   Base + SubdirName + llvm::sys::path::get_separator() + "usr/include");
697
698  // Only include <base>/include if we're not cross compiling (but do allow it
699  // if we're on Windows and building for Windows on another architecture),
700  // or if the sysroot has been set (where we presume the user has pointed it
701  // at an arch specific subdirectory).
702  if (!::isCrossCompiling(getTriple(), /*RequireArchMatch=*/false) ||
703      getDriver().SysRoot.size())
704    addSystemInclude(DriverArgs, CC1Args, Base + "include");
705}
706
707void toolchains::MinGW::addClangTargetOptions(
708    const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
709    Action::OffloadKind DeviceOffloadKind) const {
710  if (Arg *A = DriverArgs.getLastArg(options::OPT_mguard_EQ)) {
711    StringRef GuardArgs = A->getValue();
712    if (GuardArgs == "none") {
713      // Do nothing.
714    } else if (GuardArgs == "cf") {
715      // Emit CFG instrumentation and the table of address-taken functions.
716      CC1Args.push_back("-cfguard");
717    } else if (GuardArgs == "cf-nochecks") {
718      // Emit only the table of address-taken functions.
719      CC1Args.push_back("-cfguard-no-checks");
720    } else {
721      getDriver().Diag(diag::err_drv_unsupported_option_argument)
722          << A->getSpelling() << GuardArgs;
723    }
724  }
725
726  CC1Args.push_back("-fno-use-init-array");
727
728  for (auto Opt : {options::OPT_mthreads, options::OPT_mwindows,
729                   options::OPT_mconsole, options::OPT_mdll}) {
730    if (Arg *A = DriverArgs.getLastArgNoClaim(Opt))
731      A->ignoreTargetSpecific();
732  }
733}
734
735void toolchains::MinGW::AddClangCXXStdlibIncludeArgs(
736    const ArgList &DriverArgs, ArgStringList &CC1Args) const {
737  if (DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdlibinc,
738                        options::OPT_nostdincxx))
739    return;
740
741  StringRef Slash = llvm::sys::path::get_separator();
742
743  switch (GetCXXStdlibType(DriverArgs)) {
744  case ToolChain::CST_Libcxx: {
745    std::string TargetDir = (Base + "include" + Slash + getTripleString() +
746                             Slash + "c++" + Slash + "v1")
747                                .str();
748    if (getDriver().getVFS().exists(TargetDir))
749      addSystemInclude(DriverArgs, CC1Args, TargetDir);
750    addSystemInclude(DriverArgs, CC1Args,
751                     Base + SubdirName + Slash + "include" + Slash + "c++" +
752                         Slash + "v1");
753    addSystemInclude(DriverArgs, CC1Args,
754                     Base + "include" + Slash + "c++" + Slash + "v1");
755    break;
756  }
757
758  case ToolChain::CST_Libstdcxx:
759    llvm::SmallVector<llvm::SmallString<1024>, 7> CppIncludeBases;
760    CppIncludeBases.emplace_back(Base);
761    llvm::sys::path::append(CppIncludeBases[0], SubdirName, "include", "c++");
762    CppIncludeBases.emplace_back(Base);
763    llvm::sys::path::append(CppIncludeBases[1], SubdirName, "include", "c++",
764                            Ver);
765    CppIncludeBases.emplace_back(Base);
766    llvm::sys::path::append(CppIncludeBases[2], "include", "c++", Ver);
767    CppIncludeBases.emplace_back(GccLibDir);
768    llvm::sys::path::append(CppIncludeBases[3], "include", "c++");
769    CppIncludeBases.emplace_back(GccLibDir);
770    llvm::sys::path::append(CppIncludeBases[4], "include",
771                            "g++-v" + GccVer.Text);
772    CppIncludeBases.emplace_back(GccLibDir);
773    llvm::sys::path::append(CppIncludeBases[5], "include",
774                            "g++-v" + GccVer.MajorStr + "." + GccVer.MinorStr);
775    CppIncludeBases.emplace_back(GccLibDir);
776    llvm::sys::path::append(CppIncludeBases[6], "include",
777                            "g++-v" + GccVer.MajorStr);
778    for (auto &CppIncludeBase : CppIncludeBases) {
779      addSystemInclude(DriverArgs, CC1Args, CppIncludeBase);
780      CppIncludeBase += Slash;
781      addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + TripleDirName);
782      addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + "backward");
783    }
784    break;
785  }
786}
787
788static bool testTriple(const Driver &D, const llvm::Triple &Triple,
789                       const ArgList &Args) {
790  // If an explicit sysroot is set, that will be used and we shouldn't try to
791  // detect anything else.
792  std::string SubdirName;
793  if (D.SysRoot.size())
794    return true;
795  llvm::Triple LiteralTriple = getLiteralTriple(D, Triple);
796  std::string InstallBase =
797      std::string(llvm::sys::path::parent_path(D.getInstalledDir()));
798  if (llvm::ErrorOr<std::string> TargetSubdir =
799          findClangRelativeSysroot(D, LiteralTriple, Triple, SubdirName))
800    return true;
801  // If the install base itself looks like a mingw sysroot, we'll use that
802  // - don't use any potentially unrelated gcc to influence what triple to use.
803  if (looksLikeMinGWSysroot(InstallBase))
804    return false;
805  if (llvm::ErrorOr<std::string> GPPName = findGcc(LiteralTriple, Triple))
806    return true;
807  // If we neither found a colocated sysroot or a matching gcc executable,
808  // conclude that we can't know if this is the correct spelling of the triple.
809  return false;
810}
811
812static llvm::Triple adjustTriple(const Driver &D, const llvm::Triple &Triple,
813                                 const ArgList &Args) {
814  // First test if the original triple can find a sysroot with the triple
815  // name.
816  if (testTriple(D, Triple, Args))
817    return Triple;
818  llvm::SmallVector<llvm::StringRef, 3> Archs;
819  // If not, test a couple other possible arch names that might be what was
820  // intended.
821  if (Triple.getArch() == llvm::Triple::x86) {
822    Archs.emplace_back("i386");
823    Archs.emplace_back("i586");
824    Archs.emplace_back("i686");
825  } else if (Triple.getArch() == llvm::Triple::arm ||
826             Triple.getArch() == llvm::Triple::thumb) {
827    Archs.emplace_back("armv7");
828  }
829  for (auto A : Archs) {
830    llvm::Triple TestTriple(Triple);
831    TestTriple.setArchName(A);
832    if (testTriple(D, TestTriple, Args))
833      return TestTriple;
834  }
835  // If none was found, just proceed with the original value.
836  return Triple;
837}
838
839void toolchains::MinGW::fixTripleArch(const Driver &D, llvm::Triple &Triple,
840                                      const ArgList &Args) {
841  if (Triple.getArch() == llvm::Triple::x86 ||
842      Triple.getArch() == llvm::Triple::arm ||
843      Triple.getArch() == llvm::Triple::thumb)
844    Triple = adjustTriple(D, Triple, Args);
845}
846