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(Elt: "--32");
40 } else if (getToolChain().getArch() == llvm::Triple::x86_64) {
41 CmdArgs.push_back(Elt: "--64");
42 }
43
44 Args.AddAllArgValues(Output&: CmdArgs, Id0: options::OPT_Wa_COMMA, Id1: options::OPT_Xassembler);
45
46 CmdArgs.push_back(Elt: "-o");
47 CmdArgs.push_back(Elt: Output.getFilename());
48
49 for (const auto &II : Inputs)
50 CmdArgs.push_back(Elt: II.getFilename());
51
52 const char *Exec = Args.MakeArgString(Str: getToolChain().GetProgramPath(Name: "as"));
53 C.addCommand(C: std::make_unique<Command>(args: JA, args: *this, args: ResponseFileSupport::None(),
54 args&: Exec, args&: CmdArgs, args: Inputs, args: Output));
55
56 if (Args.hasArg(Ids: options::OPT_gsplit_dwarf))
57 SplitDebugInfo(TC: getToolChain(), C, T: *this, JA, Args, Output,
58 OutFile: SplitDebugName(JA, Args, Input: Inputs[0], Output));
59}
60
61void tools::MinGW::Linker::AddLibGCC(const ArgList &Args,
62 ArgStringList &CmdArgs) const {
63 if (Args.hasArg(Ids: options::OPT_mthreads))
64 CmdArgs.push_back(Elt: "-lmingwthrd");
65 CmdArgs.push_back(Elt: "-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(Ids: options::OPT_static_libgcc) ||
71 Args.hasArg(Ids: options::OPT_static);
72 bool Shared = Args.hasArg(Ids: options::OPT_shared);
73 bool CXX = getToolChain().getDriver().CCCIsCXX();
74
75 if (Static || (!CXX && !Shared)) {
76 CmdArgs.push_back(Elt: "-lgcc");
77 CmdArgs.push_back(Elt: "-lgcc_eh");
78 } else {
79 CmdArgs.push_back(Elt: "-lgcc_s");
80 CmdArgs.push_back(Elt: "-lgcc");
81 }
82 } else {
83 AddRunTimeLibs(TC: getToolChain(), D: getToolChain().getDriver(), CmdArgs, Args);
84 }
85
86 CmdArgs.push_back(Elt: "-lmoldname");
87 CmdArgs.push_back(Elt: "-lmingwex");
88 for (auto Lib : Args.getAllArgValues(Id: options::OPT_l))
89 if (StringRef(Lib).starts_with(Prefix: "msvcr") ||
90 StringRef(Lib).starts_with(Prefix: "ucrt") ||
91 StringRef(Lib).starts_with(Prefix: "crtdll"))
92 return;
93 CmdArgs.push_back(Elt: "-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(JobArgs: Args);
104
105 ArgStringList CmdArgs;
106
107 // Silence warning for "clang -g foo.o -o foo"
108 Args.ClaimAllArgs(Id0: options::OPT_g_Group);
109 // and "clang -emit-llvm foo.o -o foo"
110 Args.ClaimAllArgs(Id0: 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(Id0: options::OPT_w);
114
115 if (!D.SysRoot.empty())
116 CmdArgs.push_back(Elt: Args.MakeArgString(Str: "--sysroot=" + D.SysRoot));
117
118 if (Args.hasArg(Ids: options::OPT_s))
119 CmdArgs.push_back(Elt: "-s");
120
121 CmdArgs.push_back(Elt: "-m");
122 switch (TC.getArch()) {
123 case llvm::Triple::x86:
124 CmdArgs.push_back(Elt: "i386pe");
125 break;
126 case llvm::Triple::x86_64:
127 CmdArgs.push_back(Elt: "i386pep");
128 break;
129 case llvm::Triple::arm:
130 case llvm::Triple::thumb:
131 // FIXME: this is incorrect for WinCE
132 CmdArgs.push_back(Elt: "thumb2pe");
133 break;
134 case llvm::Triple::aarch64:
135 if (TC.getEffectiveTriple().isWindowsArm64EC())
136 CmdArgs.push_back(Elt: "arm64ecpe");
137 else
138 CmdArgs.push_back(Elt: "arm64pe");
139 break;
140 default:
141 D.Diag(DiagID: diag::err_target_unknown_triple) << TC.getEffectiveTriple().str();
142 }
143
144 Arg *SubsysArg =
145 Args.getLastArg(Ids: options::OPT_mwindows, Ids: options::OPT_mconsole);
146 if (SubsysArg && SubsysArg->getOption().matches(ID: options::OPT_mwindows)) {
147 CmdArgs.push_back(Elt: "--subsystem");
148 CmdArgs.push_back(Elt: "windows");
149 } else if (SubsysArg &&
150 SubsysArg->getOption().matches(ID: options::OPT_mconsole)) {
151 CmdArgs.push_back(Elt: "--subsystem");
152 CmdArgs.push_back(Elt: "console");
153 }
154
155 if (Args.hasArg(Ids: options::OPT_mdll))
156 CmdArgs.push_back(Elt: "--dll");
157 else if (Args.hasArg(Ids: options::OPT_shared))
158 CmdArgs.push_back(Elt: "--shared");
159 if (Args.hasArg(Ids: options::OPT_static))
160 CmdArgs.push_back(Elt: "-Bstatic");
161 else
162 CmdArgs.push_back(Elt: "-Bdynamic");
163 if (Args.hasArg(Ids: options::OPT_mdll) || Args.hasArg(Ids: options::OPT_shared)) {
164 CmdArgs.push_back(Elt: "-e");
165 if (TC.getArch() == llvm::Triple::x86)
166 CmdArgs.push_back(Elt: "_DllMainCRTStartup@12");
167 else
168 CmdArgs.push_back(Elt: "DllMainCRTStartup");
169 CmdArgs.push_back(Elt: "--enable-auto-image-base");
170 }
171
172 if (Args.hasArg(Ids: options::OPT_Z_Xlinker__no_demangle))
173 CmdArgs.push_back(Elt: "--no-demangle");
174
175 if (!Args.hasFlag(Pos: options::OPT_fauto_import, Neg: options::OPT_fno_auto_import,
176 Default: true))
177 CmdArgs.push_back(Elt: "--disable-auto-import");
178
179 if (Arg *A = Args.getLastArg(Ids: options::OPT_mguard_EQ)) {
180 StringRef GuardArgs = A->getValue();
181 if (GuardArgs == "none")
182 CmdArgs.push_back(Elt: "--no-guard-cf");
183 else if (GuardArgs == "cf" || GuardArgs == "cf-nochecks")
184 CmdArgs.push_back(Elt: "--guard-cf");
185 else
186 D.Diag(DiagID: diag::err_drv_unsupported_option_argument)
187 << A->getSpelling() << GuardArgs;
188 }
189
190 CmdArgs.push_back(Elt: "-o");
191 const char *OutputFile = Output.getFilename();
192 // GCC implicitly adds an .exe extension if it is given an output file name
193 // that lacks an extension.
194 // GCC used to do this only when the compiler itself runs on windows, but
195 // since GCC 8 it does the same when cross compiling as well.
196 if (!llvm::sys::path::has_extension(path: OutputFile)) {
197 CmdArgs.push_back(Elt: Args.MakeArgString(Str: Twine(OutputFile) + ".exe"));
198 OutputFile = CmdArgs.back();
199 } else
200 CmdArgs.push_back(Elt: OutputFile);
201
202 // FIXME: add -N, -n flags
203 Args.AddLastArg(Output&: CmdArgs, Ids: options::OPT_r);
204 Args.AddLastArg(Output&: CmdArgs, Ids: options::OPT_s);
205 Args.AddLastArg(Output&: CmdArgs, Ids: options::OPT_t);
206 Args.AddAllArgs(Output&: CmdArgs, Id0: options::OPT_u_Group);
207
208 // Add asan_dynamic as the first import lib before other libs. This allows
209 // asan to be initialized as early as possible to increase its instrumentation
210 // coverage to include other user DLLs which has not been built with asan.
211 if (Sanitize.needsAsanRt() && !Args.hasArg(Ids: options::OPT_nostdlib) &&
212 !Args.hasArg(Ids: options::OPT_nodefaultlibs)) {
213 // MinGW always links against a shared MSVCRT.
214 CmdArgs.push_back(
215 Elt: TC.getCompilerRTArgString(Args, Component: "asan_dynamic", Type: ToolChain::FT_Shared));
216 }
217
218 if (!Args.hasArg(Ids: options::OPT_nostdlib, Ids: options::OPT_nostartfiles)) {
219 if (Args.hasArg(Ids: options::OPT_shared) || Args.hasArg(Ids: options::OPT_mdll)) {
220 CmdArgs.push_back(Elt: Args.MakeArgString(Str: TC.GetFilePath(Name: "dllcrt2.o")));
221 } else {
222 if (Args.hasArg(Ids: options::OPT_municode))
223 CmdArgs.push_back(Elt: Args.MakeArgString(Str: TC.GetFilePath(Name: "crt2u.o")));
224 else
225 CmdArgs.push_back(Elt: Args.MakeArgString(Str: TC.GetFilePath(Name: "crt2.o")));
226 }
227 if (Args.hasArg(Ids: options::OPT_pg))
228 CmdArgs.push_back(Elt: Args.MakeArgString(Str: TC.GetFilePath(Name: "gcrt2.o")));
229 CmdArgs.push_back(Elt: Args.MakeArgString(Str: TC.GetFilePath(Name: "crtbegin.o")));
230 }
231
232 Args.AddAllArgs(Output&: CmdArgs, Id0: options::OPT_L);
233 TC.AddFilePathLibArgs(Args, CmdArgs);
234
235 // Add the compiler-rt library directories if they exist to help
236 // the linker find the various sanitizer, builtin, and profiling runtimes.
237 for (const auto &LibPath : TC.getLibraryPaths()) {
238 if (TC.getVFS().exists(Path: LibPath))
239 CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-L" + LibPath));
240 }
241 auto CRTPath = TC.getCompilerRTPath();
242 if (TC.getVFS().exists(Path: CRTPath))
243 CmdArgs.push_back(Elt: Args.MakeArgString(Str: "-L" + CRTPath));
244
245 AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
246
247 if (D.isUsingLTO()) {
248 assert(!Inputs.empty() && "Must have at least one input.");
249 addLTOOptions(ToolChain: TC, Args, CmdArgs, Output, Input: Inputs[0],
250 IsThinLTO: D.getLTOMode() == LTOK_Thin);
251 }
252
253 if (C.getDriver().IsFlangMode()) {
254 addFortranRuntimeLibraryPath(TC, Args, CmdArgs);
255 addFortranRuntimeLibs(TC, Args, CmdArgs);
256 }
257
258 // TODO: Add profile stuff here
259
260 if (TC.ShouldLinkCXXStdlib(Args)) {
261 bool OnlyLibstdcxxStatic = Args.hasArg(Ids: options::OPT_static_libstdcxx) &&
262 !Args.hasArg(Ids: options::OPT_static);
263 if (OnlyLibstdcxxStatic)
264 CmdArgs.push_back(Elt: "-Bstatic");
265 TC.AddCXXStdlibLibArgs(Args, CmdArgs);
266 if (OnlyLibstdcxxStatic)
267 CmdArgs.push_back(Elt: "-Bdynamic");
268 }
269
270 bool HasWindowsApp = false;
271 for (auto Lib : Args.getAllArgValues(Id: options::OPT_l)) {
272 if (Lib == "windowsapp") {
273 HasWindowsApp = true;
274 break;
275 }
276 }
277
278 if (!Args.hasArg(Ids: options::OPT_nostdlib)) {
279 if (!Args.hasArg(Ids: options::OPT_nodefaultlibs)) {
280 if (Args.hasArg(Ids: options::OPT_static))
281 CmdArgs.push_back(Elt: "--start-group");
282
283 if (Args.hasArg(Ids: options::OPT_fstack_protector) ||
284 Args.hasArg(Ids: options::OPT_fstack_protector_strong) ||
285 Args.hasArg(Ids: options::OPT_fstack_protector_all)) {
286 CmdArgs.push_back(Elt: "-lssp_nonshared");
287 CmdArgs.push_back(Elt: "-lssp");
288 }
289
290 if (Args.hasFlag(Pos: options::OPT_fopenmp, PosAlias: options::OPT_fopenmp_EQ,
291 Neg: options::OPT_fno_openmp, Default: false)) {
292 switch (TC.getDriver().getOpenMPRuntime(Args)) {
293 case Driver::OMPRT_OMP:
294 CmdArgs.push_back(Elt: "-lomp");
295 break;
296 case Driver::OMPRT_IOMP5:
297 CmdArgs.push_back(Elt: "-liomp5md");
298 break;
299 case Driver::OMPRT_GOMP:
300 CmdArgs.push_back(Elt: "-lgomp");
301 break;
302 case Driver::OMPRT_Unknown:
303 // Already diagnosed.
304 break;
305 }
306 }
307
308 AddLibGCC(Args, CmdArgs);
309
310 if (Args.hasArg(Ids: options::OPT_pg))
311 CmdArgs.push_back(Elt: "-lgmon");
312
313 if (Args.hasArg(Ids: options::OPT_pthread))
314 CmdArgs.push_back(Elt: "-lpthread");
315
316 if (Sanitize.needsAsanRt()) {
317 // MinGW always links against a shared MSVCRT.
318 CmdArgs.push_back(Elt: TC.getCompilerRTArgString(Args, Component: "asan_dynamic",
319 Type: ToolChain::FT_Shared));
320 CmdArgs.push_back(
321 Elt: TC.getCompilerRTArgString(Args, Component: "asan_dynamic_runtime_thunk"));
322 CmdArgs.push_back(Elt: "--require-defined");
323 CmdArgs.push_back(Elt: TC.getArch() == llvm::Triple::x86
324 ? "___asan_seh_interceptor"
325 : "__asan_seh_interceptor");
326 // Make sure the linker consider all object files from the dynamic
327 // runtime thunk.
328 CmdArgs.push_back(Elt: "--whole-archive");
329 CmdArgs.push_back(
330 Elt: TC.getCompilerRTArgString(Args, Component: "asan_dynamic_runtime_thunk"));
331 CmdArgs.push_back(Elt: "--no-whole-archive");
332 }
333
334 TC.addProfileRTLibs(Args, CmdArgs);
335
336 if (!HasWindowsApp) {
337 // Add system libraries. If linking to libwindowsapp.a, that import
338 // library replaces all these and we shouldn't accidentally try to
339 // link to the normal desktop mode dlls.
340 if (Args.hasArg(Ids: options::OPT_mwindows)) {
341 CmdArgs.push_back(Elt: "-lgdi32");
342 CmdArgs.push_back(Elt: "-lcomdlg32");
343 }
344 CmdArgs.push_back(Elt: "-ladvapi32");
345 CmdArgs.push_back(Elt: "-lshell32");
346 CmdArgs.push_back(Elt: "-luser32");
347 CmdArgs.push_back(Elt: "-lkernel32");
348 }
349
350 if (Args.hasArg(Ids: options::OPT_static)) {
351 CmdArgs.push_back(Elt: "--end-group");
352 } else {
353 AddLibGCC(Args, CmdArgs);
354 if (!HasWindowsApp)
355 CmdArgs.push_back(Elt: "-lkernel32");
356 }
357 }
358
359 if (!Args.hasArg(Ids: options::OPT_nostartfiles)) {
360 // Add crtfastmath.o if available and fast math is enabled.
361 TC.addFastMathRuntimeIfAvailable(Args, CmdArgs);
362
363 CmdArgs.push_back(Elt: Args.MakeArgString(Str: TC.GetFilePath(Name: "crtend.o")));
364 }
365 }
366 const char *Exec = Args.MakeArgString(Str: TC.GetLinkerPath());
367 C.addCommand(C: std::make_unique<Command>(args: JA, args: *this,
368 args: ResponseFileSupport::AtFileUTF8(),
369 args&: Exec, args&: CmdArgs, args: Inputs, args: Output));
370}
371
372static bool isCrossCompiling(const llvm::Triple &T, bool RequireArchMatch) {
373 llvm::Triple HostTriple(llvm::Triple::normalize(LLVM_HOST_TRIPLE));
374 if (HostTriple.getOS() != llvm::Triple::Win32)
375 return true;
376 if (RequireArchMatch && HostTriple.getArch() != T.getArch())
377 return true;
378 return false;
379}
380
381// Simplified from Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple.
382static bool findGccVersion(StringRef LibDir, std::string &GccLibDir,
383 std::string &Ver,
384 toolchains::Generic_GCC::GCCVersion &Version) {
385 Version = toolchains::Generic_GCC::GCCVersion::Parse(VersionText: "0.0.0");
386 std::error_code EC;
387 for (llvm::sys::fs::directory_iterator LI(LibDir, EC), LE; !EC && LI != LE;
388 LI = LI.increment(ec&: EC)) {
389 StringRef VersionText = llvm::sys::path::filename(path: LI->path());
390 auto CandidateVersion =
391 toolchains::Generic_GCC::GCCVersion::Parse(VersionText);
392 if (CandidateVersion.Major == -1)
393 continue;
394 if (CandidateVersion <= Version)
395 continue;
396 Version = CandidateVersion;
397 Ver = std::string(VersionText);
398 GccLibDir = LI->path();
399 }
400 return Ver.size();
401}
402
403static llvm::Triple getLiteralTriple(const Driver &D, const llvm::Triple &T) {
404 llvm::Triple LiteralTriple(D.getTargetTriple());
405 // The arch portion of the triple may be overridden by -m32/-m64.
406 LiteralTriple.setArchName(T.getArchName());
407 return LiteralTriple;
408}
409
410void toolchains::MinGW::findGccLibDir(const llvm::Triple &LiteralTriple) {
411 llvm::SmallVector<llvm::SmallString<32>, 5> SubdirNames;
412 SubdirNames.emplace_back(Args: LiteralTriple.str());
413 SubdirNames.emplace_back(Args: getTriple().str());
414 SubdirNames.emplace_back(Args: getTriple().getArchName());
415 SubdirNames.back() += "-w64-mingw32";
416 SubdirNames.emplace_back(Args: getTriple().getArchName());
417 SubdirNames.back() += "-w64-mingw32ucrt";
418 SubdirNames.emplace_back(Args: "mingw32");
419 if (SubdirName.empty()) {
420 SubdirName = getTriple().getArchName();
421 SubdirName += "-w64-mingw32";
422 }
423 // lib: Arch Linux, Ubuntu, Windows
424 // lib64: openSUSE Linux
425 for (StringRef CandidateLib : {"lib", "lib64"}) {
426 for (StringRef CandidateSysroot : SubdirNames) {
427 llvm::SmallString<1024> LibDir(Base);
428 llvm::sys::path::append(path&: LibDir, a: CandidateLib, b: "gcc", c: CandidateSysroot);
429 if (findGccVersion(LibDir, GccLibDir, Ver, Version&: GccVer)) {
430 SubdirName = std::string(CandidateSysroot);
431 return;
432 }
433 }
434 }
435}
436
437static llvm::ErrorOr<std::string> findGcc(const llvm::Triple &LiteralTriple,
438 const llvm::Triple &T) {
439 llvm::SmallVector<llvm::SmallString<32>, 5> Gccs;
440 Gccs.emplace_back(Args: LiteralTriple.str());
441 Gccs.back() += "-gcc";
442 Gccs.emplace_back(Args: T.str());
443 Gccs.back() += "-gcc";
444 Gccs.emplace_back(Args: T.getArchName());
445 Gccs.back() += "-w64-mingw32-gcc";
446 Gccs.emplace_back(Args: T.getArchName());
447 Gccs.back() += "-w64-mingw32ucrt-gcc";
448 Gccs.emplace_back(Args: "mingw32-gcc");
449 // Please do not add "gcc" here
450 for (StringRef CandidateGcc : Gccs)
451 if (llvm::ErrorOr<std::string> GPPName = llvm::sys::findProgramByName(Name: CandidateGcc))
452 return GPPName;
453 return make_error_code(e: std::errc::no_such_file_or_directory);
454}
455
456static llvm::ErrorOr<std::string>
457findClangRelativeSysroot(const Driver &D, const llvm::Triple &LiteralTriple,
458 const llvm::Triple &T, std::string &SubdirName) {
459 llvm::SmallVector<llvm::SmallString<32>, 4> Subdirs;
460 Subdirs.emplace_back(Args: LiteralTriple.str());
461 Subdirs.emplace_back(Args: T.str());
462 Subdirs.emplace_back(Args: T.getArchName());
463 Subdirs.back() += "-w64-mingw32";
464 Subdirs.emplace_back(Args: T.getArchName());
465 Subdirs.back() += "-w64-mingw32ucrt";
466 StringRef ClangRoot = llvm::sys::path::parent_path(path: D.Dir);
467 StringRef Sep = llvm::sys::path::get_separator();
468 for (StringRef CandidateSubdir : Subdirs) {
469 if (llvm::sys::fs::is_directory(Path: ClangRoot + Sep + CandidateSubdir)) {
470 SubdirName = std::string(CandidateSubdir);
471 return (ClangRoot + Sep + CandidateSubdir).str();
472 }
473 }
474 return make_error_code(e: std::errc::no_such_file_or_directory);
475}
476
477static bool looksLikeMinGWSysroot(const std::string &Directory) {
478 StringRef Sep = llvm::sys::path::get_separator();
479 if (!llvm::sys::fs::exists(Path: Directory + Sep + "include" + Sep + "_mingw.h"))
480 return false;
481 if (!llvm::sys::fs::exists(Path: Directory + Sep + "lib" + Sep + "libkernel32.a"))
482 return false;
483 return true;
484}
485
486toolchains::MinGW::MinGW(const Driver &D, const llvm::Triple &Triple,
487 const ArgList &Args)
488 : ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args),
489 RocmInstallation(D, Triple, Args) {
490 getProgramPaths().push_back(Elt: getDriver().Dir);
491
492 std::string InstallBase =
493 std::string(llvm::sys::path::parent_path(path: getDriver().Dir));
494 // The sequence for detecting a sysroot here should be kept in sync with
495 // the testTriple function below.
496 llvm::Triple LiteralTriple = getLiteralTriple(D, T: getTriple());
497 if (getDriver().SysRoot.size())
498 Base = getDriver().SysRoot;
499 // Look for <clang-bin>/../<triplet>; if found, use <clang-bin>/.. as the
500 // base as it could still be a base for a gcc setup with libgcc.
501 else if (llvm::ErrorOr<std::string> TargetSubdir = findClangRelativeSysroot(
502 D: getDriver(), LiteralTriple, T: getTriple(), SubdirName))
503 Base = std::string(llvm::sys::path::parent_path(path: TargetSubdir.get()));
504 // If the install base of Clang seems to have mingw sysroot files directly
505 // in the toplevel include and lib directories, use this as base instead of
506 // looking for a triple prefixed GCC in the path.
507 else if (looksLikeMinGWSysroot(Directory: InstallBase))
508 Base = InstallBase;
509 else if (llvm::ErrorOr<std::string> GPPName =
510 findGcc(LiteralTriple, T: getTriple()))
511 Base = std::string(llvm::sys::path::parent_path(
512 path: llvm::sys::path::parent_path(path: GPPName.get())));
513 else
514 Base = InstallBase;
515
516 Base += llvm::sys::path::get_separator();
517 findGccLibDir(LiteralTriple);
518 TripleDirName = SubdirName;
519 // GccLibDir must precede Base/lib so that the
520 // correct crtbegin.o ,cetend.o would be found.
521 getFilePaths().push_back(Elt: GccLibDir);
522
523 // openSUSE/Fedora
524 std::string CandidateSubdir = SubdirName + "/sys-root/mingw";
525 if (getDriver().getVFS().exists(Path: Base + CandidateSubdir))
526 SubdirName = CandidateSubdir;
527
528 getFilePaths().push_back(
529 Elt: (Base + SubdirName + llvm::sys::path::get_separator() + "lib").str());
530
531 // Gentoo
532 getFilePaths().push_back(
533 Elt: (Base + SubdirName + llvm::sys::path::get_separator() + "mingw/lib").str());
534
535 // Only include <base>/lib if we're not cross compiling (not even for
536 // windows->windows to a different arch), or if the sysroot has been set
537 // (where we presume the user has pointed it at an arch specific
538 // subdirectory).
539 if (!::isCrossCompiling(T: getTriple(), /*RequireArchMatch=*/true) ||
540 getDriver().SysRoot.size())
541 getFilePaths().push_back(Elt: Base + "lib");
542
543 NativeLLVMSupport =
544 Args.getLastArgValue(Id: options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER)
545 .equals_insensitive(RHS: "lld");
546}
547
548Tool *toolchains::MinGW::getTool(Action::ActionClass AC) const {
549 switch (AC) {
550 case Action::PreprocessJobClass:
551 if (!Preprocessor)
552 Preprocessor.reset(p: new tools::gcc::Preprocessor(*this));
553 return Preprocessor.get();
554 case Action::CompileJobClass:
555 if (!Compiler)
556 Compiler.reset(p: new tools::gcc::Compiler(*this));
557 return Compiler.get();
558 default:
559 return ToolChain::getTool(AC);
560 }
561}
562
563Tool *toolchains::MinGW::buildAssembler() const {
564 return new tools::MinGW::Assembler(*this);
565}
566
567Tool *toolchains::MinGW::buildLinker() const {
568 return new tools::MinGW::Linker(*this);
569}
570
571bool toolchains::MinGW::HasNativeLLVMSupport() const {
572 return NativeLLVMSupport;
573}
574
575ToolChain::UnwindTableLevel
576toolchains::MinGW::getDefaultUnwindTableLevel(const ArgList &Args) const {
577 Arg *ExceptionArg = Args.getLastArg(Ids: options::OPT_fsjlj_exceptions,
578 Ids: options::OPT_fseh_exceptions,
579 Ids: options::OPT_fdwarf_exceptions);
580 if (ExceptionArg &&
581 ExceptionArg->getOption().matches(ID: options::OPT_fseh_exceptions))
582 return UnwindTableLevel::Asynchronous;
583
584 if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::arm ||
585 getArch() == llvm::Triple::thumb || getArch() == llvm::Triple::aarch64)
586 return UnwindTableLevel::Asynchronous;
587 return UnwindTableLevel::None;
588}
589
590bool toolchains::MinGW::isPICDefault() const {
591 return getArch() == llvm::Triple::x86_64 ||
592 getArch() == llvm::Triple::aarch64;
593}
594
595bool toolchains::MinGW::isPIEDefault(const llvm::opt::ArgList &Args) const {
596 return false;
597}
598
599bool toolchains::MinGW::isPICDefaultForced() const { return true; }
600
601llvm::ExceptionHandling
602toolchains::MinGW::GetExceptionModel(const ArgList &Args) const {
603 if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::aarch64 ||
604 getArch() == llvm::Triple::arm || getArch() == llvm::Triple::thumb)
605 return llvm::ExceptionHandling::WinEH;
606 return llvm::ExceptionHandling::DwarfCFI;
607}
608
609SanitizerMask toolchains::MinGW::getSupportedSanitizers() const {
610 SanitizerMask Res = ToolChain::getSupportedSanitizers();
611 Res |= SanitizerKind::Address;
612 Res |= SanitizerKind::PointerCompare;
613 Res |= SanitizerKind::PointerSubtract;
614 Res |= SanitizerKind::Vptr;
615 return Res;
616}
617
618void toolchains::MinGW::AddCudaIncludeArgs(const ArgList &DriverArgs,
619 ArgStringList &CC1Args) const {
620 CudaInstallation->AddCudaIncludeArgs(DriverArgs, CC1Args);
621}
622
623void toolchains::MinGW::AddHIPIncludeArgs(const ArgList &DriverArgs,
624 ArgStringList &CC1Args) const {
625 RocmInstallation->AddHIPIncludeArgs(DriverArgs, CC1Args);
626}
627
628void toolchains::MinGW::printVerboseInfo(raw_ostream &OS) const {
629 CudaInstallation->print(OS);
630 RocmInstallation->print(OS);
631}
632
633// Include directories for various hosts:
634
635// Windows, mingw.org
636// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++
637// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\mingw32
638// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\backward
639// c:\mingw\include
640// c:\mingw\mingw32\include
641
642// Windows, mingw-w64 mingw-builds
643// c:\mingw32\i686-w64-mingw32\include
644// c:\mingw32\i686-w64-mingw32\include\c++
645// c:\mingw32\i686-w64-mingw32\include\c++\i686-w64-mingw32
646// c:\mingw32\i686-w64-mingw32\include\c++\backward
647
648// Windows, mingw-w64 msys2
649// c:\msys64\mingw32\include
650// c:\msys64\mingw32\i686-w64-mingw32\include
651// c:\msys64\mingw32\include\c++\4.9.2
652// c:\msys64\mingw32\include\c++\4.9.2\i686-w64-mingw32
653// c:\msys64\mingw32\include\c++\4.9.2\backward
654
655// openSUSE
656// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++
657// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/x86_64-w64-mingw32
658// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/backward
659// /usr/x86_64-w64-mingw32/sys-root/mingw/include
660
661// Arch Linux
662// /usr/i686-w64-mingw32/include/c++/5.1.0
663// /usr/i686-w64-mingw32/include/c++/5.1.0/i686-w64-mingw32
664// /usr/i686-w64-mingw32/include/c++/5.1.0/backward
665// /usr/i686-w64-mingw32/include
666
667// Ubuntu
668// /usr/include/c++/4.8
669// /usr/include/c++/4.8/x86_64-w64-mingw32
670// /usr/include/c++/4.8/backward
671// /usr/x86_64-w64-mingw32/include
672
673// Fedora
674// /usr/x86_64-w64-mingw32ucrt/sys-root/mingw/include/c++/x86_64-w64-mingw32ucrt
675// /usr/x86_64-w64-mingw32ucrt/sys-root/mingw/include/c++/backward
676// /usr/x86_64-w64-mingw32ucrt/sys-root/mingw/include
677// /usr/lib/gcc/x86_64-w64-mingw32ucrt/12.2.1/include-fixed
678
679void toolchains::MinGW::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
680 ArgStringList &CC1Args) const {
681 if (DriverArgs.hasArg(Ids: options::OPT_nostdinc))
682 return;
683
684 if (!DriverArgs.hasArg(Ids: options::OPT_nobuiltininc)) {
685 SmallString<1024> P(getDriver().ResourceDir);
686 llvm::sys::path::append(path&: P, a: "include");
687 addSystemInclude(DriverArgs, CC1Args, Path: P.str());
688 }
689
690 if (DriverArgs.hasArg(Ids: options::OPT_nostdlibinc))
691 return;
692
693 addSystemInclude(DriverArgs, CC1Args,
694 Path: Base + SubdirName + llvm::sys::path::get_separator() +
695 "include");
696
697 // Gentoo
698 addSystemInclude(DriverArgs, CC1Args,
699 Path: Base + SubdirName + llvm::sys::path::get_separator() + "usr/include");
700
701 // Only include <base>/include if we're not cross compiling (but do allow it
702 // if we're on Windows and building for Windows on another architecture),
703 // or if the sysroot has been set (where we presume the user has pointed it
704 // at an arch specific subdirectory).
705 if (!::isCrossCompiling(T: getTriple(), /*RequireArchMatch=*/false) ||
706 getDriver().SysRoot.size())
707 addSystemInclude(DriverArgs, CC1Args, Path: Base + "include");
708}
709
710void toolchains::MinGW::addClangTargetOptions(
711 const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
712 Action::OffloadKind DeviceOffloadKind) const {
713 if (Arg *A = DriverArgs.getLastArg(Ids: options::OPT_mguard_EQ)) {
714 StringRef GuardArgs = A->getValue();
715 if (GuardArgs == "none") {
716 // Do nothing.
717 } else if (GuardArgs == "cf") {
718 // Emit CFG instrumentation and the table of address-taken functions.
719 CC1Args.push_back(Elt: "-cfguard");
720 } else if (GuardArgs == "cf-nochecks") {
721 // Emit only the table of address-taken functions.
722 CC1Args.push_back(Elt: "-cfguard-no-checks");
723 } else {
724 getDriver().Diag(DiagID: diag::err_drv_unsupported_option_argument)
725 << A->getSpelling() << GuardArgs;
726 }
727 }
728
729 // Default to not enabling sized deallocation, but let user provided options
730 // override it.
731 //
732 // If using sized deallocation, user code that invokes delete will end up
733 // calling delete(void*,size_t). If the user wanted to override the
734 // operator delete(void*), there may be a fallback operator
735 // delete(void*,size_t) which calls the regular operator delete(void*).
736 //
737 // However, if the C++ standard library is linked in the form of a DLL,
738 // and the fallback operator delete(void*,size_t) is within this DLL (which is
739 // the case for libc++ at least) it will only redirect towards the library's
740 // default operator delete(void*), not towards the user's provided operator
741 // delete(void*).
742 //
743 // This issue can be avoided, if the fallback operators are linked statically
744 // into the callers, even if the C++ standard library is linked as a DLL.
745 //
746 // This is meant as a temporary workaround until libc++ implements this
747 // technique, which is tracked in
748 // https://github.com/llvm/llvm-project/issues/96899.
749 if (!DriverArgs.hasArgNoClaim(Ids: options::OPT_fsized_deallocation,
750 Ids: options::OPT_fno_sized_deallocation))
751 CC1Args.push_back(Elt: "-fno-sized-deallocation");
752
753 CC1Args.push_back(Elt: "-fno-use-init-array");
754
755 for (auto Opt : {options::OPT_mthreads, options::OPT_mwindows,
756 options::OPT_mconsole, options::OPT_mdll}) {
757 if (Arg *A = DriverArgs.getLastArgNoClaim(Ids: Opt))
758 A->ignoreTargetSpecific();
759 }
760}
761
762void toolchains::MinGW::AddClangCXXStdlibIncludeArgs(
763 const ArgList &DriverArgs, ArgStringList &CC1Args) const {
764 if (DriverArgs.hasArg(Ids: options::OPT_nostdinc, Ids: options::OPT_nostdlibinc,
765 Ids: options::OPT_nostdincxx))
766 return;
767
768 StringRef Slash = llvm::sys::path::get_separator();
769
770 switch (GetCXXStdlibType(Args: DriverArgs)) {
771 case ToolChain::CST_Libcxx: {
772 std::string TargetDir = (Base + "include" + Slash + getTripleString() +
773 Slash + "c++" + Slash + "v1")
774 .str();
775 if (getDriver().getVFS().exists(Path: TargetDir))
776 addSystemInclude(DriverArgs, CC1Args, Path: TargetDir);
777 addSystemInclude(DriverArgs, CC1Args,
778 Path: Base + SubdirName + Slash + "include" + Slash + "c++" +
779 Slash + "v1");
780 addSystemInclude(DriverArgs, CC1Args,
781 Path: Base + "include" + Slash + "c++" + Slash + "v1");
782 break;
783 }
784
785 case ToolChain::CST_Libstdcxx:
786 llvm::SmallVector<llvm::SmallString<1024>, 7> CppIncludeBases;
787 CppIncludeBases.emplace_back(Args: Base);
788 llvm::sys::path::append(path&: CppIncludeBases[0], a: SubdirName, b: "include", c: "c++");
789 CppIncludeBases.emplace_back(Args: Base);
790 llvm::sys::path::append(path&: CppIncludeBases[1], a: SubdirName, b: "include", c: "c++",
791 d: Ver);
792 CppIncludeBases.emplace_back(Args: Base);
793 llvm::sys::path::append(path&: CppIncludeBases[2], a: "include", b: "c++", c: Ver);
794 CppIncludeBases.emplace_back(Args: GccLibDir);
795 llvm::sys::path::append(path&: CppIncludeBases[3], a: "include", b: "c++");
796 CppIncludeBases.emplace_back(Args: GccLibDir);
797 llvm::sys::path::append(path&: CppIncludeBases[4], a: "include",
798 b: "g++-v" + GccVer.Text);
799 CppIncludeBases.emplace_back(Args: GccLibDir);
800 llvm::sys::path::append(path&: CppIncludeBases[5], a: "include",
801 b: "g++-v" + GccVer.MajorStr + "." + GccVer.MinorStr);
802 CppIncludeBases.emplace_back(Args: GccLibDir);
803 llvm::sys::path::append(path&: CppIncludeBases[6], a: "include",
804 b: "g++-v" + GccVer.MajorStr);
805 for (auto &CppIncludeBase : CppIncludeBases) {
806 addSystemInclude(DriverArgs, CC1Args, Path: CppIncludeBase);
807 CppIncludeBase += Slash;
808 addSystemInclude(DriverArgs, CC1Args, Path: CppIncludeBase + TripleDirName);
809 addSystemInclude(DriverArgs, CC1Args, Path: CppIncludeBase + "backward");
810 }
811 break;
812 }
813}
814
815static bool testTriple(const Driver &D, const llvm::Triple &Triple,
816 const ArgList &Args) {
817 // If an explicit sysroot is set, that will be used and we shouldn't try to
818 // detect anything else.
819 std::string SubdirName;
820 if (D.SysRoot.size())
821 return true;
822 llvm::Triple LiteralTriple = getLiteralTriple(D, T: Triple);
823 std::string InstallBase = std::string(llvm::sys::path::parent_path(path: D.Dir));
824 if (llvm::ErrorOr<std::string> TargetSubdir =
825 findClangRelativeSysroot(D, LiteralTriple, T: Triple, SubdirName))
826 return true;
827 // If the install base itself looks like a mingw sysroot, we'll use that
828 // - don't use any potentially unrelated gcc to influence what triple to use.
829 if (looksLikeMinGWSysroot(Directory: InstallBase))
830 return false;
831 if (llvm::ErrorOr<std::string> GPPName = findGcc(LiteralTriple, T: Triple))
832 return true;
833 // If we neither found a colocated sysroot or a matching gcc executable,
834 // conclude that we can't know if this is the correct spelling of the triple.
835 return false;
836}
837
838static llvm::Triple adjustTriple(const Driver &D, const llvm::Triple &Triple,
839 const ArgList &Args) {
840 // First test if the original triple can find a sysroot with the triple
841 // name.
842 if (testTriple(D, Triple, Args))
843 return Triple;
844 llvm::SmallVector<llvm::StringRef, 3> Archs;
845 // If not, test a couple other possible arch names that might be what was
846 // intended.
847 if (Triple.getArch() == llvm::Triple::x86) {
848 Archs.emplace_back(Args: "i386");
849 Archs.emplace_back(Args: "i586");
850 Archs.emplace_back(Args: "i686");
851 } else if (Triple.getArch() == llvm::Triple::arm ||
852 Triple.getArch() == llvm::Triple::thumb) {
853 Archs.emplace_back(Args: "armv7");
854 }
855 for (auto A : Archs) {
856 llvm::Triple TestTriple(Triple);
857 TestTriple.setArchName(A);
858 if (testTriple(D, Triple: TestTriple, Args))
859 return TestTriple;
860 }
861 // If none was found, just proceed with the original value.
862 return Triple;
863}
864
865void toolchains::MinGW::fixTripleArch(const Driver &D, llvm::Triple &Triple,
866 const ArgList &Args) {
867 if (Triple.getArch() == llvm::Triple::x86 ||
868 Triple.getArch() == llvm::Triple::arm ||
869 Triple.getArch() == llvm::Triple::thumb)
870 Triple = adjustTriple(D, Triple, Args);
871}
872