xref: /freebsd/contrib/llvm-project/clang/lib/Driver/ToolChains/MinGW.cpp (revision 0d8fe2373503aeac48492f28073049a8bfa4feb5) 
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 "InputInfo.h"
11 #include "CommonArgs.h"
12 #include "clang/Config/config.h"
13 #include "clang/Driver/Compilation.h"
14 #include "clang/Driver/Driver.h"
15 #include "clang/Driver/DriverDiagnostic.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") || StringRef(Lib).startswith("ucrt"))
90       return;
91   CmdArgs.push_back("-lmsvcrt");
92 }
93 
94 void tools::MinGW::Linker::ConstructJob(Compilation &C, const JobAction &JA,
95                                         const InputInfo &Output,
96                                         const InputInfoList &Inputs,
97                                         const ArgList &Args,
98                                         const char *LinkingOutput) const {
99   const ToolChain &TC = getToolChain();
100   const Driver &D = TC.getDriver();
101   const SanitizerArgs &Sanitize = TC.getSanitizerArgs();
102 
103   ArgStringList CmdArgs;
104 
105   // Silence warning for "clang -g foo.o -o foo"
106   Args.ClaimAllArgs(options::OPT_g_Group);
107   // and "clang -emit-llvm foo.o -o foo"
108   Args.ClaimAllArgs(options::OPT_emit_llvm);
109   // and for "clang -w foo.o -o foo". Other warning options are already
110   // handled somewhere else.
111   Args.ClaimAllArgs(options::OPT_w);
112 
113   if (!D.SysRoot.empty())
114     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
115 
116   if (Args.hasArg(options::OPT_s))
117     CmdArgs.push_back("-s");
118 
119   CmdArgs.push_back("-m");
120   switch (TC.getArch()) {
121   case llvm::Triple::x86:
122     CmdArgs.push_back("i386pe");
123     break;
124   case llvm::Triple::x86_64:
125     CmdArgs.push_back("i386pep");
126     break;
127   case llvm::Triple::arm:
128   case llvm::Triple::thumb:
129     // FIXME: this is incorrect for WinCE
130     CmdArgs.push_back("thumb2pe");
131     break;
132   case llvm::Triple::aarch64:
133     CmdArgs.push_back("arm64pe");
134     break;
135   default:
136     llvm_unreachable("Unsupported target architecture.");
137   }
138 
139   if (Args.hasArg(options::OPT_mwindows)) {
140     CmdArgs.push_back("--subsystem");
141     CmdArgs.push_back("windows");
142   } else if (Args.hasArg(options::OPT_mconsole)) {
143     CmdArgs.push_back("--subsystem");
144     CmdArgs.push_back("console");
145   }
146 
147   if (Args.hasArg(options::OPT_mdll))
148     CmdArgs.push_back("--dll");
149   else if (Args.hasArg(options::OPT_shared))
150     CmdArgs.push_back("--shared");
151   if (Args.hasArg(options::OPT_static))
152     CmdArgs.push_back("-Bstatic");
153   else
154     CmdArgs.push_back("-Bdynamic");
155   if (Args.hasArg(options::OPT_mdll) || Args.hasArg(options::OPT_shared)) {
156     CmdArgs.push_back("-e");
157     if (TC.getArch() == llvm::Triple::x86)
158       CmdArgs.push_back("_DllMainCRTStartup@12");
159     else
160       CmdArgs.push_back("DllMainCRTStartup");
161     CmdArgs.push_back("--enable-auto-image-base");
162   }
163 
164   CmdArgs.push_back("-o");
165   const char *OutputFile = Output.getFilename();
166   // GCC implicitly adds an .exe extension if it is given an output file name
167   // that lacks an extension.
168   // GCC used to do this only when the compiler itself runs on windows, but
169   // since GCC 8 it does the same when cross compiling as well.
170   if (!llvm::sys::path::has_extension(OutputFile)) {
171     CmdArgs.push_back(Args.MakeArgString(Twine(OutputFile) + ".exe"));
172     OutputFile = CmdArgs.back();
173   } else
174     CmdArgs.push_back(OutputFile);
175 
176   Args.AddAllArgs(CmdArgs, options::OPT_e);
177   // FIXME: add -N, -n flags
178   Args.AddLastArg(CmdArgs, options::OPT_r);
179   Args.AddLastArg(CmdArgs, options::OPT_s);
180   Args.AddLastArg(CmdArgs, options::OPT_t);
181   Args.AddAllArgs(CmdArgs, options::OPT_u_Group);
182   Args.AddLastArg(CmdArgs, options::OPT_Z_Flag);
183 
184   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
185     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_mdll)) {
186       CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("dllcrt2.o")));
187     } else {
188       if (Args.hasArg(options::OPT_municode))
189         CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2u.o")));
190       else
191         CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2.o")));
192     }
193     if (Args.hasArg(options::OPT_pg))
194       CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("gcrt2.o")));
195     CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtbegin.o")));
196   }
197 
198   Args.AddAllArgs(CmdArgs, options::OPT_L);
199   TC.AddFilePathLibArgs(Args, CmdArgs);
200 
201   // Add the compiler-rt library directories if they exist to help
202   // the linker find the various sanitizer, builtin, and profiling runtimes.
203   for (const auto &LibPath : TC.getLibraryPaths()) {
204     if (TC.getVFS().exists(LibPath))
205       CmdArgs.push_back(Args.MakeArgString("-L" + LibPath));
206   }
207   auto CRTPath = TC.getCompilerRTPath();
208   if (TC.getVFS().exists(CRTPath))
209     CmdArgs.push_back(Args.MakeArgString("-L" + CRTPath));
210 
211   AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
212 
213   // TODO: Add profile stuff here
214 
215   if (TC.ShouldLinkCXXStdlib(Args)) {
216     bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
217                                !Args.hasArg(options::OPT_static);
218     if (OnlyLibstdcxxStatic)
219       CmdArgs.push_back("-Bstatic");
220     TC.AddCXXStdlibLibArgs(Args, CmdArgs);
221     if (OnlyLibstdcxxStatic)
222       CmdArgs.push_back("-Bdynamic");
223   }
224 
225   bool HasWindowsApp = false;
226   for (auto Lib : Args.getAllArgValues(options::OPT_l)) {
227     if (Lib == "windowsapp") {
228       HasWindowsApp = true;
229       break;
230     }
231   }
232 
233   if (!Args.hasArg(options::OPT_nostdlib)) {
234     if (!Args.hasArg(options::OPT_nodefaultlibs)) {
235       if (Args.hasArg(options::OPT_static))
236         CmdArgs.push_back("--start-group");
237 
238       if (Args.hasArg(options::OPT_fstack_protector) ||
239           Args.hasArg(options::OPT_fstack_protector_strong) ||
240           Args.hasArg(options::OPT_fstack_protector_all)) {
241         CmdArgs.push_back("-lssp_nonshared");
242         CmdArgs.push_back("-lssp");
243       }
244 
245       if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
246                        options::OPT_fno_openmp, false)) {
247         switch (TC.getDriver().getOpenMPRuntime(Args)) {
248         case Driver::OMPRT_OMP:
249           CmdArgs.push_back("-lomp");
250           break;
251         case Driver::OMPRT_IOMP5:
252           CmdArgs.push_back("-liomp5md");
253           break;
254         case Driver::OMPRT_GOMP:
255           CmdArgs.push_back("-lgomp");
256           break;
257         case Driver::OMPRT_Unknown:
258           // Already diagnosed.
259           break;
260         }
261       }
262 
263       AddLibGCC(Args, CmdArgs);
264 
265       if (Args.hasArg(options::OPT_pg))
266         CmdArgs.push_back("-lgmon");
267 
268       if (Args.hasArg(options::OPT_pthread))
269         CmdArgs.push_back("-lpthread");
270 
271       if (Sanitize.needsAsanRt()) {
272         // MinGW always links against a shared MSVCRT.
273         CmdArgs.push_back(TC.getCompilerRTArgString(Args, "asan_dynamic",
274                                                     ToolChain::FT_Shared));
275         CmdArgs.push_back(
276             TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
277         CmdArgs.push_back("--require-defined");
278         CmdArgs.push_back(TC.getArch() == llvm::Triple::x86
279                               ? "___asan_seh_interceptor"
280                               : "__asan_seh_interceptor");
281         // Make sure the linker consider all object files from the dynamic
282         // runtime thunk.
283         CmdArgs.push_back("--whole-archive");
284         CmdArgs.push_back(
285             TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
286         CmdArgs.push_back("--no-whole-archive");
287       }
288 
289       TC.addProfileRTLibs(Args, CmdArgs);
290 
291       if (!HasWindowsApp) {
292         // Add system libraries. If linking to libwindowsapp.a, that import
293         // library replaces all these and we shouldn't accidentally try to
294         // link to the normal desktop mode dlls.
295         if (Args.hasArg(options::OPT_mwindows)) {
296           CmdArgs.push_back("-lgdi32");
297           CmdArgs.push_back("-lcomdlg32");
298         }
299         CmdArgs.push_back("-ladvapi32");
300         CmdArgs.push_back("-lshell32");
301         CmdArgs.push_back("-luser32");
302         CmdArgs.push_back("-lkernel32");
303       }
304 
305       if (Args.hasArg(options::OPT_static)) {
306         CmdArgs.push_back("--end-group");
307       } else {
308         AddLibGCC(Args, CmdArgs);
309         if (!HasWindowsApp)
310           CmdArgs.push_back("-lkernel32");
311       }
312     }
313 
314     if (!Args.hasArg(options::OPT_nostartfiles)) {
315       // Add crtfastmath.o if available and fast math is enabled.
316       TC.addFastMathRuntimeIfAvailable(Args, CmdArgs);
317 
318       CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtend.o")));
319     }
320   }
321   const char *Exec = Args.MakeArgString(TC.GetLinkerPath());
322   C.addCommand(std::make_unique<Command>(JA, *this,
323                                          ResponseFileSupport::AtFileUTF8(),
324                                          Exec, CmdArgs, Inputs, Output));
325 }
326 
327 // Simplified from Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple.
328 static bool findGccVersion(StringRef LibDir, std::string &GccLibDir,
329                            std::string &Ver) {
330   auto Version = toolchains::Generic_GCC::GCCVersion::Parse("0.0.0");
331   std::error_code EC;
332   for (llvm::sys::fs::directory_iterator LI(LibDir, EC), LE; !EC && LI != LE;
333        LI = LI.increment(EC)) {
334     StringRef VersionText = llvm::sys::path::filename(LI->path());
335     auto CandidateVersion =
336         toolchains::Generic_GCC::GCCVersion::Parse(VersionText);
337     if (CandidateVersion.Major == -1)
338       continue;
339     if (CandidateVersion <= Version)
340       continue;
341     Ver = std::string(VersionText);
342     GccLibDir = LI->path();
343   }
344   return Ver.size();
345 }
346 
347 void toolchains::MinGW::findGccLibDir() {
348   llvm::SmallVector<llvm::SmallString<32>, 2> Archs;
349   Archs.emplace_back(getTriple().getArchName());
350   Archs[0] += "-w64-mingw32";
351   Archs.emplace_back("mingw32");
352   if (Arch.empty())
353     Arch = std::string(Archs[0].str());
354   // lib: Arch Linux, Ubuntu, Windows
355   // lib64: openSUSE Linux
356   for (StringRef CandidateLib : {"lib", "lib64"}) {
357     for (StringRef CandidateArch : Archs) {
358       llvm::SmallString<1024> LibDir(Base);
359       llvm::sys::path::append(LibDir, CandidateLib, "gcc", CandidateArch);
360       if (findGccVersion(LibDir, GccLibDir, Ver)) {
361         Arch = std::string(CandidateArch);
362         return;
363       }
364     }
365   }
366 }
367 
368 llvm::ErrorOr<std::string> toolchains::MinGW::findGcc() {
369   llvm::SmallVector<llvm::SmallString<32>, 2> Gccs;
370   Gccs.emplace_back(getTriple().getArchName());
371   Gccs[0] += "-w64-mingw32-gcc";
372   Gccs.emplace_back("mingw32-gcc");
373   // Please do not add "gcc" here
374   for (StringRef CandidateGcc : Gccs)
375     if (llvm::ErrorOr<std::string> GPPName = llvm::sys::findProgramByName(CandidateGcc))
376       return GPPName;
377   return make_error_code(std::errc::no_such_file_or_directory);
378 }
379 
380 llvm::ErrorOr<std::string> toolchains::MinGW::findClangRelativeSysroot() {
381   llvm::SmallVector<llvm::SmallString<32>, 2> Subdirs;
382   Subdirs.emplace_back(getTriple().str());
383   Subdirs.emplace_back(getTriple().getArchName());
384   Subdirs[1] += "-w64-mingw32";
385   StringRef ClangRoot =
386       llvm::sys::path::parent_path(getDriver().getInstalledDir());
387   StringRef Sep = llvm::sys::path::get_separator();
388   for (StringRef CandidateSubdir : Subdirs) {
389     if (llvm::sys::fs::is_directory(ClangRoot + Sep + CandidateSubdir)) {
390       Arch = std::string(CandidateSubdir);
391       return (ClangRoot + Sep + CandidateSubdir).str();
392     }
393   }
394   return make_error_code(std::errc::no_such_file_or_directory);
395 }
396 
397 toolchains::MinGW::MinGW(const Driver &D, const llvm::Triple &Triple,
398                          const ArgList &Args)
399     : ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args),
400       RocmInstallation(D, Triple, Args) {
401   getProgramPaths().push_back(getDriver().getInstalledDir());
402 
403   if (getDriver().SysRoot.size())
404     Base = getDriver().SysRoot;
405   // Look for <clang-bin>/../<triplet>; if found, use <clang-bin>/.. as the
406   // base as it could still be a base for a gcc setup with libgcc.
407   else if (llvm::ErrorOr<std::string> TargetSubdir = findClangRelativeSysroot())
408     Base = std::string(llvm::sys::path::parent_path(TargetSubdir.get()));
409   else if (llvm::ErrorOr<std::string> GPPName = findGcc())
410     Base = std::string(llvm::sys::path::parent_path(
411         llvm::sys::path::parent_path(GPPName.get())));
412   else
413     Base = std::string(
414         llvm::sys::path::parent_path(getDriver().getInstalledDir()));
415 
416   Base += llvm::sys::path::get_separator();
417   findGccLibDir();
418   // GccLibDir must precede Base/lib so that the
419   // correct crtbegin.o ,cetend.o would be found.
420   getFilePaths().push_back(GccLibDir);
421   getFilePaths().push_back(
422       (Base + Arch + llvm::sys::path::get_separator() + "lib").str());
423   getFilePaths().push_back(Base + "lib");
424   // openSUSE
425   getFilePaths().push_back(Base + Arch + "/sys-root/mingw/lib");
426 
427   NativeLLVMSupport =
428       Args.getLastArgValue(options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER)
429           .equals_lower("lld");
430 }
431 
432 bool toolchains::MinGW::IsIntegratedAssemblerDefault() const { return true; }
433 
434 Tool *toolchains::MinGW::getTool(Action::ActionClass AC) const {
435   switch (AC) {
436   case Action::PreprocessJobClass:
437     if (!Preprocessor)
438       Preprocessor.reset(new tools::gcc::Preprocessor(*this));
439     return Preprocessor.get();
440   case Action::CompileJobClass:
441     if (!Compiler)
442       Compiler.reset(new tools::gcc::Compiler(*this));
443     return Compiler.get();
444   default:
445     return ToolChain::getTool(AC);
446   }
447 }
448 
449 Tool *toolchains::MinGW::buildAssembler() const {
450   return new tools::MinGW::Assembler(*this);
451 }
452 
453 Tool *toolchains::MinGW::buildLinker() const {
454   return new tools::MinGW::Linker(*this);
455 }
456 
457 bool toolchains::MinGW::HasNativeLLVMSupport() const {
458   return NativeLLVMSupport;
459 }
460 
461 bool toolchains::MinGW::IsUnwindTablesDefault(const ArgList &Args) const {
462   Arg *ExceptionArg = Args.getLastArg(options::OPT_fsjlj_exceptions,
463                                       options::OPT_fseh_exceptions,
464                                       options::OPT_fdwarf_exceptions);
465   if (ExceptionArg &&
466       ExceptionArg->getOption().matches(options::OPT_fseh_exceptions))
467     return true;
468   return getArch() == llvm::Triple::x86_64 ||
469          getArch() == llvm::Triple::aarch64;
470 }
471 
472 bool toolchains::MinGW::isPICDefault() const {
473   return getArch() == llvm::Triple::x86_64;
474 }
475 
476 bool toolchains::MinGW::isPIEDefault() const { return false; }
477 
478 bool toolchains::MinGW::isPICDefaultForced() const {
479   return getArch() == llvm::Triple::x86_64;
480 }
481 
482 llvm::ExceptionHandling
483 toolchains::MinGW::GetExceptionModel(const ArgList &Args) const {
484   if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::aarch64)
485     return llvm::ExceptionHandling::WinEH;
486   return llvm::ExceptionHandling::DwarfCFI;
487 }
488 
489 SanitizerMask toolchains::MinGW::getSupportedSanitizers() const {
490   SanitizerMask Res = ToolChain::getSupportedSanitizers();
491   Res |= SanitizerKind::Address;
492   Res |= SanitizerKind::PointerCompare;
493   Res |= SanitizerKind::PointerSubtract;
494   Res |= SanitizerKind::Vptr;
495   return Res;
496 }
497 
498 void toolchains::MinGW::AddCudaIncludeArgs(const ArgList &DriverArgs,
499                                            ArgStringList &CC1Args) const {
500   CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
501 }
502 
503 void toolchains::MinGW::AddHIPIncludeArgs(const ArgList &DriverArgs,
504                                           ArgStringList &CC1Args) const {
505   RocmInstallation.AddHIPIncludeArgs(DriverArgs, CC1Args);
506 }
507 
508 void toolchains::MinGW::printVerboseInfo(raw_ostream &OS) const {
509   CudaInstallation.print(OS);
510   RocmInstallation.print(OS);
511 }
512 
513 // Include directories for various hosts:
514 
515 // Windows, mingw.org
516 // c:\mingw\lib\gcc\mingw32\4.8.1\include\c++
517 // c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\mingw32
518 // c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\backward
519 // c:\mingw\include
520 // c:\mingw\mingw32\include
521 
522 // Windows, mingw-w64 mingw-builds
523 // c:\mingw32\i686-w64-mingw32\include
524 // c:\mingw32\i686-w64-mingw32\include\c++
525 // c:\mingw32\i686-w64-mingw32\include\c++\i686-w64-mingw32
526 // c:\mingw32\i686-w64-mingw32\include\c++\backward
527 
528 // Windows, mingw-w64 msys2
529 // c:\msys64\mingw32\include
530 // c:\msys64\mingw32\i686-w64-mingw32\include
531 // c:\msys64\mingw32\include\c++\4.9.2
532 // c:\msys64\mingw32\include\c++\4.9.2\i686-w64-mingw32
533 // c:\msys64\mingw32\include\c++\4.9.2\backward
534 
535 // openSUSE
536 // /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++
537 // /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/x86_64-w64-mingw32
538 // /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/backward
539 // /usr/x86_64-w64-mingw32/sys-root/mingw/include
540 
541 // Arch Linux
542 // /usr/i686-w64-mingw32/include/c++/5.1.0
543 // /usr/i686-w64-mingw32/include/c++/5.1.0/i686-w64-mingw32
544 // /usr/i686-w64-mingw32/include/c++/5.1.0/backward
545 // /usr/i686-w64-mingw32/include
546 
547 // Ubuntu
548 // /usr/include/c++/4.8
549 // /usr/include/c++/4.8/x86_64-w64-mingw32
550 // /usr/include/c++/4.8/backward
551 // /usr/x86_64-w64-mingw32/include
552 
553 void toolchains::MinGW::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
554                                                   ArgStringList &CC1Args) const {
555   if (DriverArgs.hasArg(options::OPT_nostdinc))
556     return;
557 
558   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
559     SmallString<1024> P(getDriver().ResourceDir);
560     llvm::sys::path::append(P, "include");
561     addSystemInclude(DriverArgs, CC1Args, P.str());
562   }
563 
564   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
565     return;
566 
567   if (GetRuntimeLibType(DriverArgs) == ToolChain::RLT_Libgcc) {
568     // openSUSE
569     addSystemInclude(DriverArgs, CC1Args,
570                      Base + Arch + "/sys-root/mingw/include");
571   }
572 
573   addSystemInclude(DriverArgs, CC1Args,
574                    Base + Arch + llvm::sys::path::get_separator() + "include");
575   addSystemInclude(DriverArgs, CC1Args, Base + "include");
576 }
577 
578 void toolchains::MinGW::AddClangCXXStdlibIncludeArgs(
579     const ArgList &DriverArgs, ArgStringList &CC1Args) const {
580   if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
581       DriverArgs.hasArg(options::OPT_nostdincxx))
582     return;
583 
584   StringRef Slash = llvm::sys::path::get_separator();
585 
586   switch (GetCXXStdlibType(DriverArgs)) {
587   case ToolChain::CST_Libcxx:
588     addSystemInclude(DriverArgs, CC1Args, Base + Arch + Slash + "include" +
589                                               Slash + "c++" + Slash + "v1");
590     addSystemInclude(DriverArgs, CC1Args,
591                      Base + "include" + Slash + "c++" + Slash + "v1");
592     break;
593 
594   case ToolChain::CST_Libstdcxx:
595     llvm::SmallVector<llvm::SmallString<1024>, 4> CppIncludeBases;
596     CppIncludeBases.emplace_back(Base);
597     llvm::sys::path::append(CppIncludeBases[0], Arch, "include", "c++");
598     CppIncludeBases.emplace_back(Base);
599     llvm::sys::path::append(CppIncludeBases[1], Arch, "include", "c++", Ver);
600     CppIncludeBases.emplace_back(Base);
601     llvm::sys::path::append(CppIncludeBases[2], "include", "c++", Ver);
602     CppIncludeBases.emplace_back(GccLibDir);
603     llvm::sys::path::append(CppIncludeBases[3], "include", "c++");
604     for (auto &CppIncludeBase : CppIncludeBases) {
605       addSystemInclude(DriverArgs, CC1Args, CppIncludeBase);
606       CppIncludeBase += Slash;
607       addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + Arch);
608       addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + "backward");
609     }
610     break;
611   }
612 }
613