xref: /freebsd/contrib/llvm-project/clang/lib/Driver/ToolChains/MinGW.cpp (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71) 
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));
55 
56   if (Args.hasArg(options::OPT_gsplit_dwarf))
57     SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output,
58                    SplitDebugName(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. However, GCC only does this when actually
168   // running on windows, not when operating as a cross compiler. As some users
169   // have come to rely on this behaviour, try to replicate it.
170 #ifdef _WIN32
171   if (!llvm::sys::path::has_extension(OutputFile))
172     CmdArgs.push_back(Args.MakeArgString(Twine(OutputFile) + ".exe"));
173   else
174     CmdArgs.push_back(OutputFile);
175 #else
176   CmdArgs.push_back(OutputFile);
177 #endif
178 
179   Args.AddAllArgs(CmdArgs, options::OPT_e);
180   // FIXME: add -N, -n flags
181   Args.AddLastArg(CmdArgs, options::OPT_r);
182   Args.AddLastArg(CmdArgs, options::OPT_s);
183   Args.AddLastArg(CmdArgs, options::OPT_t);
184   Args.AddAllArgs(CmdArgs, options::OPT_u_Group);
185   Args.AddLastArg(CmdArgs, options::OPT_Z_Flag);
186 
187   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
188     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_mdll)) {
189       CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("dllcrt2.o")));
190     } else {
191       if (Args.hasArg(options::OPT_municode))
192         CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2u.o")));
193       else
194         CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2.o")));
195     }
196     if (Args.hasArg(options::OPT_pg))
197       CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("gcrt2.o")));
198     CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtbegin.o")));
199   }
200 
201   Args.AddAllArgs(CmdArgs, options::OPT_L);
202   TC.AddFilePathLibArgs(Args, CmdArgs);
203 
204   // Add the compiler-rt library directories if they exist to help
205   // the linker find the various sanitizer, builtin, and profiling runtimes.
206   for (const auto &LibPath : TC.getLibraryPaths()) {
207     if (TC.getVFS().exists(LibPath))
208       CmdArgs.push_back(Args.MakeArgString("-L" + LibPath));
209   }
210   auto CRTPath = TC.getCompilerRTPath();
211   if (TC.getVFS().exists(CRTPath))
212     CmdArgs.push_back(Args.MakeArgString("-L" + CRTPath));
213 
214   AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
215 
216   // TODO: Add profile stuff here
217 
218   if (TC.ShouldLinkCXXStdlib(Args)) {
219     bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
220                                !Args.hasArg(options::OPT_static);
221     if (OnlyLibstdcxxStatic)
222       CmdArgs.push_back("-Bstatic");
223     TC.AddCXXStdlibLibArgs(Args, CmdArgs);
224     if (OnlyLibstdcxxStatic)
225       CmdArgs.push_back("-Bdynamic");
226   }
227 
228   bool HasWindowsApp = false;
229   for (auto Lib : Args.getAllArgValues(options::OPT_l)) {
230     if (Lib == "windowsapp") {
231       HasWindowsApp = true;
232       break;
233     }
234   }
235 
236   if (!Args.hasArg(options::OPT_nostdlib)) {
237     if (!Args.hasArg(options::OPT_nodefaultlibs)) {
238       if (Args.hasArg(options::OPT_static))
239         CmdArgs.push_back("--start-group");
240 
241       if (Args.hasArg(options::OPT_fstack_protector) ||
242           Args.hasArg(options::OPT_fstack_protector_strong) ||
243           Args.hasArg(options::OPT_fstack_protector_all)) {
244         CmdArgs.push_back("-lssp_nonshared");
245         CmdArgs.push_back("-lssp");
246       }
247 
248       if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
249                        options::OPT_fno_openmp, false)) {
250         switch (TC.getDriver().getOpenMPRuntime(Args)) {
251         case Driver::OMPRT_OMP:
252           CmdArgs.push_back("-lomp");
253           break;
254         case Driver::OMPRT_IOMP5:
255           CmdArgs.push_back("-liomp5md");
256           break;
257         case Driver::OMPRT_GOMP:
258           CmdArgs.push_back("-lgomp");
259           break;
260         case Driver::OMPRT_Unknown:
261           // Already diagnosed.
262           break;
263         }
264       }
265 
266       AddLibGCC(Args, CmdArgs);
267 
268       if (Args.hasArg(options::OPT_pg))
269         CmdArgs.push_back("-lgmon");
270 
271       if (Args.hasArg(options::OPT_pthread))
272         CmdArgs.push_back("-lpthread");
273 
274       if (Sanitize.needsAsanRt()) {
275         // MinGW always links against a shared MSVCRT.
276         CmdArgs.push_back(TC.getCompilerRTArgString(Args, "asan_dynamic",
277                                                     ToolChain::FT_Shared));
278         CmdArgs.push_back(
279             TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
280         CmdArgs.push_back("--require-defined");
281         CmdArgs.push_back(TC.getArch() == llvm::Triple::x86
282                               ? "___asan_seh_interceptor"
283                               : "__asan_seh_interceptor");
284         // Make sure the linker consider all object files from the dynamic
285         // runtime thunk.
286         CmdArgs.push_back("--whole-archive");
287         CmdArgs.push_back(
288             TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
289         CmdArgs.push_back("--no-whole-archive");
290       }
291 
292       TC.addProfileRTLibs(Args, CmdArgs);
293 
294       if (!HasWindowsApp) {
295         // Add system libraries. If linking to libwindowsapp.a, that import
296         // library replaces all these and we shouldn't accidentally try to
297         // link to the normal desktop mode dlls.
298         if (Args.hasArg(options::OPT_mwindows)) {
299           CmdArgs.push_back("-lgdi32");
300           CmdArgs.push_back("-lcomdlg32");
301         }
302         CmdArgs.push_back("-ladvapi32");
303         CmdArgs.push_back("-lshell32");
304         CmdArgs.push_back("-luser32");
305         CmdArgs.push_back("-lkernel32");
306       }
307 
308       if (Args.hasArg(options::OPT_static)) {
309         CmdArgs.push_back("--end-group");
310       } else {
311         AddLibGCC(Args, CmdArgs);
312         if (!HasWindowsApp)
313           CmdArgs.push_back("-lkernel32");
314       }
315     }
316 
317     if (!Args.hasArg(options::OPT_nostartfiles)) {
318       // Add crtfastmath.o if available and fast math is enabled.
319       TC.addFastMathRuntimeIfAvailable(Args, CmdArgs);
320 
321       CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtend.o")));
322     }
323   }
324   const char *Exec = Args.MakeArgString(TC.GetLinkerPath());
325   C.addCommand(std::make_unique<Command>(
326       JA, *this, ResponseFileSupport::AtFileUTF8(), Exec, CmdArgs, Inputs));
327 }
328 
329 // Simplified from Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple.
330 static bool findGccVersion(StringRef LibDir, std::string &GccLibDir,
331                            std::string &Ver) {
332   auto Version = toolchains::Generic_GCC::GCCVersion::Parse("0.0.0");
333   std::error_code EC;
334   for (llvm::sys::fs::directory_iterator LI(LibDir, EC), LE; !EC && LI != LE;
335        LI = LI.increment(EC)) {
336     StringRef VersionText = llvm::sys::path::filename(LI->path());
337     auto CandidateVersion =
338         toolchains::Generic_GCC::GCCVersion::Parse(VersionText);
339     if (CandidateVersion.Major == -1)
340       continue;
341     if (CandidateVersion <= Version)
342       continue;
343     Ver = std::string(VersionText);
344     GccLibDir = LI->path();
345   }
346   return Ver.size();
347 }
348 
349 void toolchains::MinGW::findGccLibDir() {
350   llvm::SmallVector<llvm::SmallString<32>, 2> Archs;
351   Archs.emplace_back(getTriple().getArchName());
352   Archs[0] += "-w64-mingw32";
353   Archs.emplace_back("mingw32");
354   if (Arch.empty())
355     Arch = std::string(Archs[0].str());
356   // lib: Arch Linux, Ubuntu, Windows
357   // lib64: openSUSE Linux
358   for (StringRef CandidateLib : {"lib", "lib64"}) {
359     for (StringRef CandidateArch : Archs) {
360       llvm::SmallString<1024> LibDir(Base);
361       llvm::sys::path::append(LibDir, CandidateLib, "gcc", CandidateArch);
362       if (findGccVersion(LibDir, GccLibDir, Ver)) {
363         Arch = std::string(CandidateArch);
364         return;
365       }
366     }
367   }
368 }
369 
370 llvm::ErrorOr<std::string> toolchains::MinGW::findGcc() {
371   llvm::SmallVector<llvm::SmallString<32>, 2> Gccs;
372   Gccs.emplace_back(getTriple().getArchName());
373   Gccs[0] += "-w64-mingw32-gcc";
374   Gccs.emplace_back("mingw32-gcc");
375   // Please do not add "gcc" here
376   for (StringRef CandidateGcc : Gccs)
377     if (llvm::ErrorOr<std::string> GPPName = llvm::sys::findProgramByName(CandidateGcc))
378       return GPPName;
379   return make_error_code(std::errc::no_such_file_or_directory);
380 }
381 
382 llvm::ErrorOr<std::string> toolchains::MinGW::findClangRelativeSysroot() {
383   llvm::SmallVector<llvm::SmallString<32>, 2> Subdirs;
384   Subdirs.emplace_back(getTriple().str());
385   Subdirs.emplace_back(getTriple().getArchName());
386   Subdirs[1] += "-w64-mingw32";
387   StringRef ClangRoot =
388       llvm::sys::path::parent_path(getDriver().getInstalledDir());
389   StringRef Sep = llvm::sys::path::get_separator();
390   for (StringRef CandidateSubdir : Subdirs) {
391     if (llvm::sys::fs::is_directory(ClangRoot + Sep + CandidateSubdir)) {
392       Arch = std::string(CandidateSubdir);
393       return (ClangRoot + Sep + CandidateSubdir).str();
394     }
395   }
396   return make_error_code(std::errc::no_such_file_or_directory);
397 }
398 
399 toolchains::MinGW::MinGW(const Driver &D, const llvm::Triple &Triple,
400                          const ArgList &Args)
401     : ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args),
402       RocmInstallation(D, Triple, Args) {
403   getProgramPaths().push_back(getDriver().getInstalledDir());
404 
405   if (getDriver().SysRoot.size())
406     Base = getDriver().SysRoot;
407   // Look for <clang-bin>/../<triplet>; if found, use <clang-bin>/.. as the
408   // base as it could still be a base for a gcc setup with libgcc.
409   else if (llvm::ErrorOr<std::string> TargetSubdir = findClangRelativeSysroot())
410     Base = std::string(llvm::sys::path::parent_path(TargetSubdir.get()));
411   else if (llvm::ErrorOr<std::string> GPPName = findGcc())
412     Base = std::string(llvm::sys::path::parent_path(
413         llvm::sys::path::parent_path(GPPName.get())));
414   else
415     Base = std::string(
416         llvm::sys::path::parent_path(getDriver().getInstalledDir()));
417 
418   Base += llvm::sys::path::get_separator();
419   findGccLibDir();
420   // GccLibDir must precede Base/lib so that the
421   // correct crtbegin.o ,cetend.o would be found.
422   getFilePaths().push_back(GccLibDir);
423   getFilePaths().push_back(
424       (Base + Arch + llvm::sys::path::get_separator() + "lib").str());
425   getFilePaths().push_back(Base + "lib");
426   // openSUSE
427   getFilePaths().push_back(Base + Arch + "/sys-root/mingw/lib");
428 
429   NativeLLVMSupport =
430       Args.getLastArgValue(options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER)
431           .equals_lower("lld");
432 }
433 
434 bool toolchains::MinGW::IsIntegratedAssemblerDefault() const { return true; }
435 
436 Tool *toolchains::MinGW::getTool(Action::ActionClass AC) const {
437   switch (AC) {
438   case Action::PreprocessJobClass:
439     if (!Preprocessor)
440       Preprocessor.reset(new tools::gcc::Preprocessor(*this));
441     return Preprocessor.get();
442   case Action::CompileJobClass:
443     if (!Compiler)
444       Compiler.reset(new tools::gcc::Compiler(*this));
445     return Compiler.get();
446   default:
447     return ToolChain::getTool(AC);
448   }
449 }
450 
451 Tool *toolchains::MinGW::buildAssembler() const {
452   return new tools::MinGW::Assembler(*this);
453 }
454 
455 Tool *toolchains::MinGW::buildLinker() const {
456   return new tools::MinGW::Linker(*this);
457 }
458 
459 bool toolchains::MinGW::HasNativeLLVMSupport() const {
460   return NativeLLVMSupport;
461 }
462 
463 bool toolchains::MinGW::IsUnwindTablesDefault(const ArgList &Args) const {
464   Arg *ExceptionArg = Args.getLastArg(options::OPT_fsjlj_exceptions,
465                                       options::OPT_fseh_exceptions,
466                                       options::OPT_fdwarf_exceptions);
467   if (ExceptionArg &&
468       ExceptionArg->getOption().matches(options::OPT_fseh_exceptions))
469     return true;
470   return getArch() == llvm::Triple::x86_64 ||
471          getArch() == llvm::Triple::aarch64;
472 }
473 
474 bool toolchains::MinGW::isPICDefault() const {
475   return getArch() == llvm::Triple::x86_64;
476 }
477 
478 bool toolchains::MinGW::isPIEDefault() const { return false; }
479 
480 bool toolchains::MinGW::isPICDefaultForced() const {
481   return getArch() == llvm::Triple::x86_64;
482 }
483 
484 llvm::ExceptionHandling
485 toolchains::MinGW::GetExceptionModel(const ArgList &Args) const {
486   if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::aarch64)
487     return llvm::ExceptionHandling::WinEH;
488   return llvm::ExceptionHandling::DwarfCFI;
489 }
490 
491 SanitizerMask toolchains::MinGW::getSupportedSanitizers() const {
492   SanitizerMask Res = ToolChain::getSupportedSanitizers();
493   Res |= SanitizerKind::Address;
494   Res |= SanitizerKind::PointerCompare;
495   Res |= SanitizerKind::PointerSubtract;
496   return Res;
497 }
498 
499 void toolchains::MinGW::AddCudaIncludeArgs(const ArgList &DriverArgs,
500                                            ArgStringList &CC1Args) const {
501   CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
502 }
503 
504 void toolchains::MinGW::AddHIPIncludeArgs(const ArgList &DriverArgs,
505                                           ArgStringList &CC1Args) const {
506   RocmInstallation.AddHIPIncludeArgs(DriverArgs, CC1Args);
507 }
508 
509 void toolchains::MinGW::printVerboseInfo(raw_ostream &OS) const {
510   CudaInstallation.print(OS);
511   RocmInstallation.print(OS);
512 }
513 
514 // Include directories for various hosts:
515 
516 // Windows, mingw.org
517 // c:\mingw\lib\gcc\mingw32\4.8.1\include\c++
518 // c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\mingw32
519 // c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\backward
520 // c:\mingw\include
521 // c:\mingw\mingw32\include
522 
523 // Windows, mingw-w64 mingw-builds
524 // c:\mingw32\i686-w64-mingw32\include
525 // c:\mingw32\i686-w64-mingw32\include\c++
526 // c:\mingw32\i686-w64-mingw32\include\c++\i686-w64-mingw32
527 // c:\mingw32\i686-w64-mingw32\include\c++\backward
528 
529 // Windows, mingw-w64 msys2
530 // c:\msys64\mingw32\include
531 // c:\msys64\mingw32\i686-w64-mingw32\include
532 // c:\msys64\mingw32\include\c++\4.9.2
533 // c:\msys64\mingw32\include\c++\4.9.2\i686-w64-mingw32
534 // c:\msys64\mingw32\include\c++\4.9.2\backward
535 
536 // openSUSE
537 // /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++
538 // /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/x86_64-w64-mingw32
539 // /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/backward
540 // /usr/x86_64-w64-mingw32/sys-root/mingw/include
541 
542 // Arch Linux
543 // /usr/i686-w64-mingw32/include/c++/5.1.0
544 // /usr/i686-w64-mingw32/include/c++/5.1.0/i686-w64-mingw32
545 // /usr/i686-w64-mingw32/include/c++/5.1.0/backward
546 // /usr/i686-w64-mingw32/include
547 
548 // Ubuntu
549 // /usr/include/c++/4.8
550 // /usr/include/c++/4.8/x86_64-w64-mingw32
551 // /usr/include/c++/4.8/backward
552 // /usr/x86_64-w64-mingw32/include
553 
554 void toolchains::MinGW::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
555                                                   ArgStringList &CC1Args) const {
556   if (DriverArgs.hasArg(options::OPT_nostdinc))
557     return;
558 
559   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
560     SmallString<1024> P(getDriver().ResourceDir);
561     llvm::sys::path::append(P, "include");
562     addSystemInclude(DriverArgs, CC1Args, P.str());
563   }
564 
565   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
566     return;
567 
568   if (GetRuntimeLibType(DriverArgs) == ToolChain::RLT_Libgcc) {
569     // openSUSE
570     addSystemInclude(DriverArgs, CC1Args,
571                      Base + Arch + "/sys-root/mingw/include");
572   }
573 
574   addSystemInclude(DriverArgs, CC1Args,
575                    Base + Arch + llvm::sys::path::get_separator() + "include");
576   addSystemInclude(DriverArgs, CC1Args, Base + "include");
577 }
578 
579 void toolchains::MinGW::AddClangCXXStdlibIncludeArgs(
580     const ArgList &DriverArgs, ArgStringList &CC1Args) const {
581   if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
582       DriverArgs.hasArg(options::OPT_nostdincxx))
583     return;
584 
585   StringRef Slash = llvm::sys::path::get_separator();
586 
587   switch (GetCXXStdlibType(DriverArgs)) {
588   case ToolChain::CST_Libcxx:
589     addSystemInclude(DriverArgs, CC1Args, Base + Arch + Slash + "include" +
590                                               Slash + "c++" + Slash + "v1");
591     addSystemInclude(DriverArgs, CC1Args,
592                      Base + "include" + Slash + "c++" + Slash + "v1");
593     break;
594 
595   case ToolChain::CST_Libstdcxx:
596     llvm::SmallVector<llvm::SmallString<1024>, 4> CppIncludeBases;
597     CppIncludeBases.emplace_back(Base);
598     llvm::sys::path::append(CppIncludeBases[0], Arch, "include", "c++");
599     CppIncludeBases.emplace_back(Base);
600     llvm::sys::path::append(CppIncludeBases[1], Arch, "include", "c++", Ver);
601     CppIncludeBases.emplace_back(Base);
602     llvm::sys::path::append(CppIncludeBases[2], "include", "c++", Ver);
603     CppIncludeBases.emplace_back(GccLibDir);
604     llvm::sys::path::append(CppIncludeBases[3], "include", "c++");
605     for (auto &CppIncludeBase : CppIncludeBases) {
606       addSystemInclude(DriverArgs, CC1Args, CppIncludeBase);
607       CppIncludeBase += Slash;
608       addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + Arch);
609       addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + "backward");
610     }
611     break;
612   }
613 }
614