Bug Summary

File:clang/lib/Driver/ToolChains/MinGW.cpp
Warning:line 178, column 5
Value stored to 'OutputFile' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name MinGW.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/build-llvm -resource-dir /usr/lib/llvm-14/lib/clang/14.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I tools/clang/lib/Driver -I /build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/clang/lib/Driver -I /build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/clang/include -I tools/clang/include -I include -I /build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-14/lib/clang/14.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/build-llvm=build-llvm -fmacro-prefix-map=/build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/build-llvm=build-llvm -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/= -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/build-llvm=build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-01-19-134126-35450-1 -x c++ /build/llvm-toolchain-snapshot-14~++20220119111520+da61cb019eb2/clang/lib/Driver/ToolChains/MinGW.cpp
1//===--- MinGW.cpp - MinGWToolChain Implementation ------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "MinGW.h"
10#include "CommonArgs.h"
11#include "clang/Config/config.h"
12#include "clang/Driver/Compilation.h"
13#include "clang/Driver/Driver.h"
14#include "clang/Driver/DriverDiagnostic.h"
15#include "clang/Driver/InputInfo.h"
16#include "clang/Driver/Options.h"
17#include "clang/Driver/SanitizerArgs.h"
18#include "llvm/Option/ArgList.h"
19#include "llvm/Support/FileSystem.h"
20#include "llvm/Support/Path.h"
21#include "llvm/Support/VirtualFileSystem.h"
22#include <system_error>
23
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).startswith("msvcr") || StringRef(Lib).startswith("ucrt"))
90 return;
91 CmdArgs.push_back("-lmsvcrt");
92}
93
94void 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(Args);
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.")::llvm::llvm_unreachable_internal("Unsupported target architecture."
, "clang/lib/Driver/ToolChains/MinGW.cpp", 136)
;
137 }
138
139 Arg *SubsysArg =
140 Args.getLastArg(options::OPT_mwindows, options::OPT_mconsole);
141 if (SubsysArg && SubsysArg->getOption().matches(options::OPT_mwindows)) {
142 CmdArgs.push_back("--subsystem");
143 CmdArgs.push_back("windows");
144 } else if (SubsysArg &&
145 SubsysArg->getOption().matches(options::OPT_mconsole)) {
146 CmdArgs.push_back("--subsystem");
147 CmdArgs.push_back("console");
148 }
149
150 if (Args.hasArg(options::OPT_mdll))
151 CmdArgs.push_back("--dll");
152 else if (Args.hasArg(options::OPT_shared))
153 CmdArgs.push_back("--shared");
154 if (Args.hasArg(options::OPT_static))
155 CmdArgs.push_back("-Bstatic");
156 else
157 CmdArgs.push_back("-Bdynamic");
158 if (Args.hasArg(options::OPT_mdll) || Args.hasArg(options::OPT_shared)) {
159 CmdArgs.push_back("-e");
160 if (TC.getArch() == llvm::Triple::x86)
161 CmdArgs.push_back("_DllMainCRTStartup@12");
162 else
163 CmdArgs.push_back("DllMainCRTStartup");
164 CmdArgs.push_back("--enable-auto-image-base");
165 }
166
167 if (Args.hasArg(options::OPT_Z_Xlinker__no_demangle))
168 CmdArgs.push_back("--no-demangle");
169
170 CmdArgs.push_back("-o");
171 const char *OutputFile = Output.getFilename();
172 // GCC implicitly adds an .exe extension if it is given an output file name
173 // that lacks an extension.
174 // GCC used to do this only when the compiler itself runs on windows, but
175 // since GCC 8 it does the same when cross compiling as well.
176 if (!llvm::sys::path::has_extension(OutputFile)) {
177 CmdArgs.push_back(Args.MakeArgString(Twine(OutputFile) + ".exe"));
178 OutputFile = CmdArgs.back();
Value stored to 'OutputFile' is never read
179 } else
180 CmdArgs.push_back(OutputFile);
181
182 Args.AddAllArgs(CmdArgs, options::OPT_e);
183 // FIXME: add -N, -n flags
184 Args.AddLastArg(CmdArgs, options::OPT_r);
185 Args.AddLastArg(CmdArgs, options::OPT_s);
186 Args.AddLastArg(CmdArgs, options::OPT_t);
187 Args.AddAllArgs(CmdArgs, options::OPT_u_Group);
188 Args.AddLastArg(CmdArgs, options::OPT_Z_Flag);
189
190 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
191 if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_mdll)) {
192 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("dllcrt2.o")));
193 } else {
194 if (Args.hasArg(options::OPT_municode))
195 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2u.o")));
196 else
197 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2.o")));
198 }
199 if (Args.hasArg(options::OPT_pg))
200 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("gcrt2.o")));
201 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtbegin.o")));
202 }
203
204 Args.AddAllArgs(CmdArgs, options::OPT_L);
205 TC.AddFilePathLibArgs(Args, CmdArgs);
206
207 // Add the compiler-rt library directories if they exist to help
208 // the linker find the various sanitizer, builtin, and profiling runtimes.
209 for (const auto &LibPath : TC.getLibraryPaths()) {
210 if (TC.getVFS().exists(LibPath))
211 CmdArgs.push_back(Args.MakeArgString("-L" + LibPath));
212 }
213 auto CRTPath = TC.getCompilerRTPath();
214 if (TC.getVFS().exists(CRTPath))
215 CmdArgs.push_back(Args.MakeArgString("-L" + CRTPath));
216
217 AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
218
219 // TODO: Add profile stuff here
220
221 if (TC.ShouldLinkCXXStdlib(Args)) {
222 bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
223 !Args.hasArg(options::OPT_static);
224 if (OnlyLibstdcxxStatic)
225 CmdArgs.push_back("-Bstatic");
226 TC.AddCXXStdlibLibArgs(Args, CmdArgs);
227 if (OnlyLibstdcxxStatic)
228 CmdArgs.push_back("-Bdynamic");
229 }
230
231 bool HasWindowsApp = false;
232 for (auto Lib : Args.getAllArgValues(options::OPT_l)) {
233 if (Lib == "windowsapp") {
234 HasWindowsApp = true;
235 break;
236 }
237 }
238
239 if (!Args.hasArg(options::OPT_nostdlib)) {
240 if (!Args.hasArg(options::OPT_nodefaultlibs)) {
241 if (Args.hasArg(options::OPT_static))
242 CmdArgs.push_back("--start-group");
243
244 if (Args.hasArg(options::OPT_fstack_protector) ||
245 Args.hasArg(options::OPT_fstack_protector_strong) ||
246 Args.hasArg(options::OPT_fstack_protector_all)) {
247 CmdArgs.push_back("-lssp_nonshared");
248 CmdArgs.push_back("-lssp");
249 }
250
251 if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
252 options::OPT_fno_openmp, false)) {
253 switch (TC.getDriver().getOpenMPRuntime(Args)) {
254 case Driver::OMPRT_OMP:
255 CmdArgs.push_back("-lomp");
256 break;
257 case Driver::OMPRT_IOMP5:
258 CmdArgs.push_back("-liomp5md");
259 break;
260 case Driver::OMPRT_GOMP:
261 CmdArgs.push_back("-lgomp");
262 break;
263 case Driver::OMPRT_Unknown:
264 // Already diagnosed.
265 break;
266 }
267 }
268
269 AddLibGCC(Args, CmdArgs);
270
271 if (Args.hasArg(options::OPT_pg))
272 CmdArgs.push_back("-lgmon");
273
274 if (Args.hasArg(options::OPT_pthread))
275 CmdArgs.push_back("-lpthread");
276
277 if (Sanitize.needsAsanRt()) {
278 // MinGW always links against a shared MSVCRT.
279 CmdArgs.push_back(TC.getCompilerRTArgString(Args, "asan_dynamic",
280 ToolChain::FT_Shared));
281 CmdArgs.push_back(
282 TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
283 CmdArgs.push_back("--require-defined");
284 CmdArgs.push_back(TC.getArch() == llvm::Triple::x86
285 ? "___asan_seh_interceptor"
286 : "__asan_seh_interceptor");
287 // Make sure the linker consider all object files from the dynamic
288 // runtime thunk.
289 CmdArgs.push_back("--whole-archive");
290 CmdArgs.push_back(
291 TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
292 CmdArgs.push_back("--no-whole-archive");
293 }
294
295 TC.addProfileRTLibs(Args, CmdArgs);
296
297 if (!HasWindowsApp) {
298 // Add system libraries. If linking to libwindowsapp.a, that import
299 // library replaces all these and we shouldn't accidentally try to
300 // link to the normal desktop mode dlls.
301 if (Args.hasArg(options::OPT_mwindows)) {
302 CmdArgs.push_back("-lgdi32");
303 CmdArgs.push_back("-lcomdlg32");
304 }
305 CmdArgs.push_back("-ladvapi32");
306 CmdArgs.push_back("-lshell32");
307 CmdArgs.push_back("-luser32");
308 CmdArgs.push_back("-lkernel32");
309 }
310
311 if (Args.hasArg(options::OPT_static)) {
312 CmdArgs.push_back("--end-group");
313 } else {
314 AddLibGCC(Args, CmdArgs);
315 if (!HasWindowsApp)
316 CmdArgs.push_back("-lkernel32");
317 }
318 }
319
320 if (!Args.hasArg(options::OPT_nostartfiles)) {
321 // Add crtfastmath.o if available and fast math is enabled.
322 TC.addFastMathRuntimeIfAvailable(Args, CmdArgs);
323
324 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtend.o")));
325 }
326 }
327 const char *Exec = Args.MakeArgString(TC.GetLinkerPath());
328 C.addCommand(std::make_unique<Command>(JA, *this,
329 ResponseFileSupport::AtFileUTF8(),
330 Exec, CmdArgs, Inputs, Output));
331}
332
333// Simplified from Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple.
334static bool findGccVersion(StringRef LibDir, std::string &GccLibDir,
335 std::string &Ver) {
336 auto Version = toolchains::Generic_GCC::GCCVersion::Parse("0.0.0");
337 std::error_code EC;
338 for (llvm::sys::fs::directory_iterator LI(LibDir, EC), LE; !EC && LI != LE;
339 LI = LI.increment(EC)) {
340 StringRef VersionText = llvm::sys::path::filename(LI->path());
341 auto CandidateVersion =
342 toolchains::Generic_GCC::GCCVersion::Parse(VersionText);
343 if (CandidateVersion.Major == -1)
344 continue;
345 if (CandidateVersion <= Version)
346 continue;
347 Version = CandidateVersion;
348 Ver = std::string(VersionText);
349 GccLibDir = LI->path();
350 }
351 return Ver.size();
352}
353
354void toolchains::MinGW::findGccLibDir() {
355 llvm::SmallVector<llvm::SmallString<32>, 2> SubdirNames;
356 SubdirNames.emplace_back(getTriple().getArchName());
357 SubdirNames[0] += "-w64-mingw32";
358 SubdirNames.emplace_back("mingw32");
359 if (SubdirName.empty())
360 SubdirName = std::string(SubdirNames[0].str());
361 // lib: Arch Linux, Ubuntu, Windows
362 // lib64: openSUSE Linux
363 for (StringRef CandidateLib : {"lib", "lib64"}) {
364 for (StringRef CandidateSysroot : SubdirNames) {
365 llvm::SmallString<1024> LibDir(Base);
366 llvm::sys::path::append(LibDir, CandidateLib, "gcc", CandidateSysroot);
367 if (findGccVersion(LibDir, GccLibDir, Ver)) {
368 SubdirName = std::string(CandidateSysroot);
369 return;
370 }
371 }
372 }
373}
374
375static llvm::ErrorOr<std::string> findGcc(const llvm::Triple &T) {
376 llvm::SmallVector<llvm::SmallString<32>, 2> Gccs;
377 Gccs.emplace_back(T.getArchName());
378 Gccs[0] += "-w64-mingw32-gcc";
379 Gccs.emplace_back("mingw32-gcc");
380 // Please do not add "gcc" here
381 for (StringRef CandidateGcc : Gccs)
382 if (llvm::ErrorOr<std::string> GPPName = llvm::sys::findProgramByName(CandidateGcc))
383 return GPPName;
384 return make_error_code(std::errc::no_such_file_or_directory);
385}
386
387static llvm::ErrorOr<std::string>
388findClangRelativeSysroot(const Driver &D, const llvm::Triple &T,
389 std::string &SubdirName) {
390 llvm::SmallVector<llvm::SmallString<32>, 2> Subdirs;
391 Subdirs.emplace_back(T.str());
392 Subdirs.emplace_back(T.getArchName());
393 Subdirs[1] += "-w64-mingw32";
394 StringRef ClangRoot = llvm::sys::path::parent_path(D.getInstalledDir());
395 StringRef Sep = llvm::sys::path::get_separator();
396 for (StringRef CandidateSubdir : Subdirs) {
397 if (llvm::sys::fs::is_directory(ClangRoot + Sep + CandidateSubdir)) {
398 SubdirName = std::string(CandidateSubdir);
399 return (ClangRoot + Sep + CandidateSubdir).str();
400 }
401 }
402 return make_error_code(std::errc::no_such_file_or_directory);
403}
404
405toolchains::MinGW::MinGW(const Driver &D, const llvm::Triple &Triple,
406 const ArgList &Args)
407 : ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args),
408 RocmInstallation(D, Triple, Args) {
409 getProgramPaths().push_back(getDriver().getInstalledDir());
410
411 // The sequence for detecting a sysroot here should be kept in sync with
412 // the testTriple function below.
413 if (getDriver().SysRoot.size())
414 Base = getDriver().SysRoot;
415 // Look for <clang-bin>/../<triplet>; if found, use <clang-bin>/.. as the
416 // base as it could still be a base for a gcc setup with libgcc.
417 else if (llvm::ErrorOr<std::string> TargetSubdir =
418 findClangRelativeSysroot(getDriver(), getTriple(), SubdirName))
419 Base = std::string(llvm::sys::path::parent_path(TargetSubdir.get()));
420 else if (llvm::ErrorOr<std::string> GPPName = findGcc(getTriple()))
421 Base = std::string(llvm::sys::path::parent_path(
422 llvm::sys::path::parent_path(GPPName.get())));
423 else
424 Base = std::string(
425 llvm::sys::path::parent_path(getDriver().getInstalledDir()));
426
427 Base += llvm::sys::path::get_separator();
428 findGccLibDir();
429 // GccLibDir must precede Base/lib so that the
430 // correct crtbegin.o ,cetend.o would be found.
431 getFilePaths().push_back(GccLibDir);
432 getFilePaths().push_back(
433 (Base + SubdirName + llvm::sys::path::get_separator() + "lib").str());
434 getFilePaths().push_back(Base + "lib");
435 // openSUSE
436 getFilePaths().push_back(Base + SubdirName + "/sys-root/mingw/lib");
437
438 NativeLLVMSupport =
439 Args.getLastArgValue(options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER"ld")
440 .equals_insensitive("lld");
441}
442
443bool toolchains::MinGW::IsIntegratedAssemblerDefault() const { return true; }
444
445Tool *toolchains::MinGW::getTool(Action::ActionClass AC) const {
446 switch (AC) {
447 case Action::PreprocessJobClass:
448 if (!Preprocessor)
449 Preprocessor.reset(new tools::gcc::Preprocessor(*this));
450 return Preprocessor.get();
451 case Action::CompileJobClass:
452 if (!Compiler)
453 Compiler.reset(new tools::gcc::Compiler(*this));
454 return Compiler.get();
455 default:
456 return ToolChain::getTool(AC);
457 }
458}
459
460Tool *toolchains::MinGW::buildAssembler() const {
461 return new tools::MinGW::Assembler(*this);
462}
463
464Tool *toolchains::MinGW::buildLinker() const {
465 return new tools::MinGW::Linker(*this);
466}
467
468bool toolchains::MinGW::HasNativeLLVMSupport() const {
469 return NativeLLVMSupport;
470}
471
472bool toolchains::MinGW::IsUnwindTablesDefault(const ArgList &Args) const {
473 Arg *ExceptionArg = Args.getLastArg(options::OPT_fsjlj_exceptions,
474 options::OPT_fseh_exceptions,
475 options::OPT_fdwarf_exceptions);
476 if (ExceptionArg &&
477 ExceptionArg->getOption().matches(options::OPT_fseh_exceptions))
478 return true;
479 return getArch() == llvm::Triple::x86_64 ||
480 getArch() == llvm::Triple::aarch64;
481}
482
483bool toolchains::MinGW::isPICDefault() const {
484 return getArch() == llvm::Triple::x86_64 ||
485 getArch() == llvm::Triple::aarch64;
486}
487
488bool toolchains::MinGW::isPIEDefault(const llvm::opt::ArgList &Args) const {
489 return false;
490}
491
492bool toolchains::MinGW::isPICDefaultForced() const { return true; }
493
494llvm::ExceptionHandling
495toolchains::MinGW::GetExceptionModel(const ArgList &Args) const {
496 if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::aarch64)
497 return llvm::ExceptionHandling::WinEH;
498 return llvm::ExceptionHandling::DwarfCFI;
499}
500
501SanitizerMask toolchains::MinGW::getSupportedSanitizers() const {
502 SanitizerMask Res = ToolChain::getSupportedSanitizers();
503 Res |= SanitizerKind::Address;
504 Res |= SanitizerKind::PointerCompare;
505 Res |= SanitizerKind::PointerSubtract;
506 Res |= SanitizerKind::Vptr;
507 return Res;
508}
509
510void toolchains::MinGW::AddCudaIncludeArgs(const ArgList &DriverArgs,
511 ArgStringList &CC1Args) const {
512 CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
513}
514
515void toolchains::MinGW::AddHIPIncludeArgs(const ArgList &DriverArgs,
516 ArgStringList &CC1Args) const {
517 RocmInstallation.AddHIPIncludeArgs(DriverArgs, CC1Args);
518}
519
520void toolchains::MinGW::printVerboseInfo(raw_ostream &OS) const {
521 CudaInstallation.print(OS);
522 RocmInstallation.print(OS);
523}
524
525// Include directories for various hosts:
526
527// Windows, mingw.org
528// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++
529// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\mingw32
530// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\backward
531// c:\mingw\include
532// c:\mingw\mingw32\include
533
534// Windows, mingw-w64 mingw-builds
535// c:\mingw32\i686-w64-mingw32\include
536// c:\mingw32\i686-w64-mingw32\include\c++
537// c:\mingw32\i686-w64-mingw32\include\c++\i686-w64-mingw32
538// c:\mingw32\i686-w64-mingw32\include\c++\backward
539
540// Windows, mingw-w64 msys2
541// c:\msys64\mingw32\include
542// c:\msys64\mingw32\i686-w64-mingw32\include
543// c:\msys64\mingw32\include\c++\4.9.2
544// c:\msys64\mingw32\include\c++\4.9.2\i686-w64-mingw32
545// c:\msys64\mingw32\include\c++\4.9.2\backward
546
547// openSUSE
548// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++
549// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/x86_64-w64-mingw32
550// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/backward
551// /usr/x86_64-w64-mingw32/sys-root/mingw/include
552
553// Arch Linux
554// /usr/i686-w64-mingw32/include/c++/5.1.0
555// /usr/i686-w64-mingw32/include/c++/5.1.0/i686-w64-mingw32
556// /usr/i686-w64-mingw32/include/c++/5.1.0/backward
557// /usr/i686-w64-mingw32/include
558
559// Ubuntu
560// /usr/include/c++/4.8
561// /usr/include/c++/4.8/x86_64-w64-mingw32
562// /usr/include/c++/4.8/backward
563// /usr/x86_64-w64-mingw32/include
564
565void toolchains::MinGW::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
566 ArgStringList &CC1Args) const {
567 if (DriverArgs.hasArg(options::OPT_nostdinc))
568 return;
569
570 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
571 SmallString<1024> P(getDriver().ResourceDir);
572 llvm::sys::path::append(P, "include");
573 addSystemInclude(DriverArgs, CC1Args, P.str());
574 }
575
576 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
577 return;
578
579 if (GetRuntimeLibType(DriverArgs) == ToolChain::RLT_Libgcc) {
580 // openSUSE
581 addSystemInclude(DriverArgs, CC1Args,
582 Base + SubdirName + "/sys-root/mingw/include");
583 }
584
585 addSystemInclude(DriverArgs, CC1Args,
586 Base + SubdirName + llvm::sys::path::get_separator() +
587 "include");
588 addSystemInclude(DriverArgs, CC1Args, Base + "include");
589}
590
591void toolchains::MinGW::AddClangCXXStdlibIncludeArgs(
592 const ArgList &DriverArgs, ArgStringList &CC1Args) const {
593 if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
594 DriverArgs.hasArg(options::OPT_nostdincxx))
595 return;
596
597 StringRef Slash = llvm::sys::path::get_separator();
598
599 switch (GetCXXStdlibType(DriverArgs)) {
600 case ToolChain::CST_Libcxx: {
601 std::string TargetDir = (Base + "include" + Slash + getTripleString() +
602 Slash + "c++" + Slash + "v1")
603 .str();
604 if (getDriver().getVFS().exists(TargetDir))
605 addSystemInclude(DriverArgs, CC1Args, TargetDir);
606 addSystemInclude(DriverArgs, CC1Args,
607 Base + SubdirName + Slash + "include" + Slash + "c++" +
608 Slash + "v1");
609 addSystemInclude(DriverArgs, CC1Args,
610 Base + "include" + Slash + "c++" + Slash + "v1");
611 break;
612 }
613
614 case ToolChain::CST_Libstdcxx:
615 llvm::SmallVector<llvm::SmallString<1024>, 4> CppIncludeBases;
616 CppIncludeBases.emplace_back(Base);
617 llvm::sys::path::append(CppIncludeBases[0], SubdirName, "include", "c++");
618 CppIncludeBases.emplace_back(Base);
619 llvm::sys::path::append(CppIncludeBases[1], SubdirName, "include", "c++",
620 Ver);
621 CppIncludeBases.emplace_back(Base);
622 llvm::sys::path::append(CppIncludeBases[2], "include", "c++", Ver);
623 CppIncludeBases.emplace_back(GccLibDir);
624 llvm::sys::path::append(CppIncludeBases[3], "include", "c++");
625 for (auto &CppIncludeBase : CppIncludeBases) {
626 addSystemInclude(DriverArgs, CC1Args, CppIncludeBase);
627 CppIncludeBase += Slash;
628 addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + SubdirName);
629 addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + "backward");
630 }
631 break;
632 }
633}
634
635static bool testTriple(const Driver &D, const llvm::Triple &Triple,
636 const ArgList &Args) {
637 // If an explicit sysroot is set, that will be used and we shouldn't try to
638 // detect anything else.
639 std::string SubdirName;
640 if (D.SysRoot.size())
641 return true;
642 if (llvm::ErrorOr<std::string> TargetSubdir =
643 findClangRelativeSysroot(D, Triple, SubdirName))
644 return true;
645 if (llvm::ErrorOr<std::string> GPPName = findGcc(Triple))
646 return true;
647 // If we neither found a colocated sysroot or a matching gcc executable,
648 // conclude that we can't know if this is the correct spelling of the triple.
649 return false;
650}
651
652static llvm::Triple adjustTriple(const Driver &D, const llvm::Triple &Triple,
653 const ArgList &Args) {
654 // First test if the original triple can find a sysroot with the triple
655 // name.
656 if (testTriple(D, Triple, Args))
657 return Triple;
658 llvm::SmallVector<llvm::StringRef, 3> Archs;
659 // If not, test a couple other possible arch names that might be what was
660 // intended.
661 if (Triple.getArch() == llvm::Triple::x86) {
662 Archs.emplace_back("i386");
663 Archs.emplace_back("i586");
664 Archs.emplace_back("i686");
665 } else if (Triple.getArch() == llvm::Triple::arm ||
666 Triple.getArch() == llvm::Triple::thumb) {
667 Archs.emplace_back("armv7");
668 }
669 for (auto A : Archs) {
670 llvm::Triple TestTriple(Triple);
671 TestTriple.setArchName(A);
672 if (testTriple(D, TestTriple, Args))
673 return TestTriple;
674 }
675 // If none was found, just proceed with the original value.
676 return Triple;
677}
678
679void toolchains::MinGW::fixTripleArch(const Driver &D, llvm::Triple &Triple,
680 const ArgList &Args) {
681 if (Triple.getArch() == llvm::Triple::x86 ||
682 Triple.getArch() == llvm::Triple::arm ||
683 Triple.getArch() == llvm::Triple::thumb)
684 Triple = adjustTriple(D, Triple, Args);
685}