Bug Summary

File:build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/clang/lib/Driver/ToolChains/MinGW.cpp
Warning:line 180, 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-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-16~++20220904122748+c444af1c20b3/build-llvm -resource-dir /usr/lib/llvm-16/lib/clang/16.0.0 -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-16~++20220904122748+c444af1c20b3/clang/lib/Driver -I /build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/clang/include -I tools/clang/include -I include -I /build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/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-16/lib/clang/16.0.0/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-16~++20220904122748+c444af1c20b3/build-llvm=build-llvm -fmacro-prefix-map=/build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/build-llvm=build-llvm -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/= -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 -Wno-misleading-indentation -std=c++17 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/build-llvm=build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/= -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-2022-09-04-125545-48738-1 -x c++ /build/llvm-toolchain-snapshot-16~++20220904122748+c444af1c20b3/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") ||
90 StringRef(Lib).startswith("ucrt") ||
91 StringRef(Lib).startswith("crtdll"))
92 return;
93 CmdArgs.push_back("-lmsvcrt");
94}
95
96void tools::MinGW::Linker::ConstructJob(Compilation &C, const JobAction &JA,
97 const InputInfo &Output,
98 const InputInfoList &Inputs,
99 const ArgList &Args,
100 const char *LinkingOutput) const {
101 const ToolChain &TC = getToolChain();
102 const Driver &D = TC.getDriver();
103 const SanitizerArgs &Sanitize = TC.getSanitizerArgs(Args);
104
105 ArgStringList CmdArgs;
106
107 // Silence warning for "clang -g foo.o -o foo"
108 Args.ClaimAllArgs(options::OPT_g_Group);
109 // and "clang -emit-llvm foo.o -o foo"
110 Args.ClaimAllArgs(options::OPT_emit_llvm);
111 // and for "clang -w foo.o -o foo". Other warning options are already
112 // handled somewhere else.
113 Args.ClaimAllArgs(options::OPT_w);
114
115 if (!D.SysRoot.empty())
116 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
117
118 if (Args.hasArg(options::OPT_s))
119 CmdArgs.push_back("-s");
120
121 CmdArgs.push_back("-m");
122 switch (TC.getArch()) {
123 case llvm::Triple::x86:
124 CmdArgs.push_back("i386pe");
125 break;
126 case llvm::Triple::x86_64:
127 CmdArgs.push_back("i386pep");
128 break;
129 case llvm::Triple::arm:
130 case llvm::Triple::thumb:
131 // FIXME: this is incorrect for WinCE
132 CmdArgs.push_back("thumb2pe");
133 break;
134 case llvm::Triple::aarch64:
135 CmdArgs.push_back("arm64pe");
136 break;
137 default:
138 llvm_unreachable("Unsupported target architecture.")::llvm::llvm_unreachable_internal("Unsupported target architecture."
, "clang/lib/Driver/ToolChains/MinGW.cpp", 138);
139 }
140
141 Arg *SubsysArg =
142 Args.getLastArg(options::OPT_mwindows, options::OPT_mconsole);
143 if (SubsysArg && SubsysArg->getOption().matches(options::OPT_mwindows)) {
144 CmdArgs.push_back("--subsystem");
145 CmdArgs.push_back("windows");
146 } else if (SubsysArg &&
147 SubsysArg->getOption().matches(options::OPT_mconsole)) {
148 CmdArgs.push_back("--subsystem");
149 CmdArgs.push_back("console");
150 }
151
152 if (Args.hasArg(options::OPT_mdll))
153 CmdArgs.push_back("--dll");
154 else if (Args.hasArg(options::OPT_shared))
155 CmdArgs.push_back("--shared");
156 if (Args.hasArg(options::OPT_static))
157 CmdArgs.push_back("-Bstatic");
158 else
159 CmdArgs.push_back("-Bdynamic");
160 if (Args.hasArg(options::OPT_mdll) || Args.hasArg(options::OPT_shared)) {
161 CmdArgs.push_back("-e");
162 if (TC.getArch() == llvm::Triple::x86)
163 CmdArgs.push_back("_DllMainCRTStartup@12");
164 else
165 CmdArgs.push_back("DllMainCRTStartup");
166 CmdArgs.push_back("--enable-auto-image-base");
167 }
168
169 if (Args.hasArg(options::OPT_Z_Xlinker__no_demangle))
170 CmdArgs.push_back("--no-demangle");
171
172 CmdArgs.push_back("-o");
173 const char *OutputFile = Output.getFilename();
174 // GCC implicitly adds an .exe extension if it is given an output file name
175 // that lacks an extension.
176 // GCC used to do this only when the compiler itself runs on windows, but
177 // since GCC 8 it does the same when cross compiling as well.
178 if (!llvm::sys::path::has_extension(OutputFile)) {
179 CmdArgs.push_back(Args.MakeArgString(Twine(OutputFile) + ".exe"));
180 OutputFile = CmdArgs.back();
Value stored to 'OutputFile' is never read
181 } else
182 CmdArgs.push_back(OutputFile);
183
184 Args.AddAllArgs(CmdArgs, options::OPT_e);
185 // FIXME: add -N, -n flags
186 Args.AddLastArg(CmdArgs, options::OPT_r);
187 Args.AddLastArg(CmdArgs, options::OPT_s);
188 Args.AddLastArg(CmdArgs, options::OPT_t);
189 Args.AddAllArgs(CmdArgs, options::OPT_u_Group);
190 Args.AddLastArg(CmdArgs, options::OPT_Z_Flag);
191
192 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
193 if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_mdll)) {
194 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("dllcrt2.o")));
195 } else {
196 if (Args.hasArg(options::OPT_municode))
197 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2u.o")));
198 else
199 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crt2.o")));
200 }
201 if (Args.hasArg(options::OPT_pg))
202 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("gcrt2.o")));
203 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtbegin.o")));
204 }
205
206 Args.AddAllArgs(CmdArgs, options::OPT_L);
207 TC.AddFilePathLibArgs(Args, CmdArgs);
208
209 // Add the compiler-rt library directories if they exist to help
210 // the linker find the various sanitizer, builtin, and profiling runtimes.
211 for (const auto &LibPath : TC.getLibraryPaths()) {
212 if (TC.getVFS().exists(LibPath))
213 CmdArgs.push_back(Args.MakeArgString("-L" + LibPath));
214 }
215 auto CRTPath = TC.getCompilerRTPath();
216 if (TC.getVFS().exists(CRTPath))
217 CmdArgs.push_back(Args.MakeArgString("-L" + CRTPath));
218
219 AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
220
221 if (C.getDriver().IsFlangMode()) {
222 addFortranRuntimeLibraryPath(TC, Args, CmdArgs);
223 addFortranRuntimeLibs(TC, CmdArgs);
224 }
225
226 // TODO: Add profile stuff here
227
228 if (TC.ShouldLinkCXXStdlib(Args)) {
229 bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
230 !Args.hasArg(options::OPT_static);
231 if (OnlyLibstdcxxStatic)
232 CmdArgs.push_back("-Bstatic");
233 TC.AddCXXStdlibLibArgs(Args, CmdArgs);
234 if (OnlyLibstdcxxStatic)
235 CmdArgs.push_back("-Bdynamic");
236 }
237
238 bool HasWindowsApp = false;
239 for (auto Lib : Args.getAllArgValues(options::OPT_l)) {
240 if (Lib == "windowsapp") {
241 HasWindowsApp = true;
242 break;
243 }
244 }
245
246 if (!Args.hasArg(options::OPT_nostdlib)) {
247 if (!Args.hasArg(options::OPT_nodefaultlibs)) {
248 if (Args.hasArg(options::OPT_static))
249 CmdArgs.push_back("--start-group");
250
251 if (Args.hasArg(options::OPT_fstack_protector) ||
252 Args.hasArg(options::OPT_fstack_protector_strong) ||
253 Args.hasArg(options::OPT_fstack_protector_all)) {
254 CmdArgs.push_back("-lssp_nonshared");
255 CmdArgs.push_back("-lssp");
256 }
257
258 if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
259 options::OPT_fno_openmp, false)) {
260 switch (TC.getDriver().getOpenMPRuntime(Args)) {
261 case Driver::OMPRT_OMP:
262 CmdArgs.push_back("-lomp");
263 break;
264 case Driver::OMPRT_IOMP5:
265 CmdArgs.push_back("-liomp5md");
266 break;
267 case Driver::OMPRT_GOMP:
268 CmdArgs.push_back("-lgomp");
269 break;
270 case Driver::OMPRT_Unknown:
271 // Already diagnosed.
272 break;
273 }
274 }
275
276 AddLibGCC(Args, CmdArgs);
277
278 if (Args.hasArg(options::OPT_pg))
279 CmdArgs.push_back("-lgmon");
280
281 if (Args.hasArg(options::OPT_pthread))
282 CmdArgs.push_back("-lpthread");
283
284 if (Sanitize.needsAsanRt()) {
285 // MinGW always links against a shared MSVCRT.
286 CmdArgs.push_back(TC.getCompilerRTArgString(Args, "asan_dynamic",
287 ToolChain::FT_Shared));
288 CmdArgs.push_back(
289 TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
290 CmdArgs.push_back("--require-defined");
291 CmdArgs.push_back(TC.getArch() == llvm::Triple::x86
292 ? "___asan_seh_interceptor"
293 : "__asan_seh_interceptor");
294 // Make sure the linker consider all object files from the dynamic
295 // runtime thunk.
296 CmdArgs.push_back("--whole-archive");
297 CmdArgs.push_back(
298 TC.getCompilerRTArgString(Args, "asan_dynamic_runtime_thunk"));
299 CmdArgs.push_back("--no-whole-archive");
300 }
301
302 TC.addProfileRTLibs(Args, CmdArgs);
303
304 if (!HasWindowsApp) {
305 // Add system libraries. If linking to libwindowsapp.a, that import
306 // library replaces all these and we shouldn't accidentally try to
307 // link to the normal desktop mode dlls.
308 if (Args.hasArg(options::OPT_mwindows)) {
309 CmdArgs.push_back("-lgdi32");
310 CmdArgs.push_back("-lcomdlg32");
311 }
312 CmdArgs.push_back("-ladvapi32");
313 CmdArgs.push_back("-lshell32");
314 CmdArgs.push_back("-luser32");
315 CmdArgs.push_back("-lkernel32");
316 }
317
318 if (Args.hasArg(options::OPT_static)) {
319 CmdArgs.push_back("--end-group");
320 } else {
321 AddLibGCC(Args, CmdArgs);
322 if (!HasWindowsApp)
323 CmdArgs.push_back("-lkernel32");
324 }
325 }
326
327 if (!Args.hasArg(options::OPT_nostartfiles)) {
328 // Add crtfastmath.o if available and fast math is enabled.
329 TC.addFastMathRuntimeIfAvailable(Args, CmdArgs);
330
331 CmdArgs.push_back(Args.MakeArgString(TC.GetFilePath("crtend.o")));
332 }
333 }
334 const char *Exec = Args.MakeArgString(TC.GetLinkerPath());
335 C.addCommand(std::make_unique<Command>(JA, *this,
336 ResponseFileSupport::AtFileUTF8(),
337 Exec, CmdArgs, Inputs, Output));
338}
339
340// Simplified from Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple.
341static bool findGccVersion(StringRef LibDir, std::string &GccLibDir,
342 std::string &Ver,
343 toolchains::Generic_GCC::GCCVersion &Version) {
344 Version = toolchains::Generic_GCC::GCCVersion::Parse("0.0.0");
345 std::error_code EC;
346 for (llvm::sys::fs::directory_iterator LI(LibDir, EC), LE; !EC && LI != LE;
347 LI = LI.increment(EC)) {
348 StringRef VersionText = llvm::sys::path::filename(LI->path());
349 auto CandidateVersion =
350 toolchains::Generic_GCC::GCCVersion::Parse(VersionText);
351 if (CandidateVersion.Major == -1)
352 continue;
353 if (CandidateVersion <= Version)
354 continue;
355 Version = CandidateVersion;
356 Ver = std::string(VersionText);
357 GccLibDir = LI->path();
358 }
359 return Ver.size();
360}
361
362void toolchains::MinGW::findGccLibDir() {
363 llvm::SmallVector<llvm::SmallString<32>, 2> SubdirNames;
364 SubdirNames.emplace_back(getTriple().getArchName());
365 SubdirNames[0] += "-w64-mingw32";
366 SubdirNames.emplace_back("mingw32");
367 if (SubdirName.empty())
368 SubdirName = std::string(SubdirNames[0].str());
369 // lib: Arch Linux, Ubuntu, Windows
370 // lib64: openSUSE Linux
371 for (StringRef CandidateLib : {"lib", "lib64"}) {
372 for (StringRef CandidateSysroot : SubdirNames) {
373 llvm::SmallString<1024> LibDir(Base);
374 llvm::sys::path::append(LibDir, CandidateLib, "gcc", CandidateSysroot);
375 if (findGccVersion(LibDir, GccLibDir, Ver, GccVer)) {
376 SubdirName = std::string(CandidateSysroot);
377 return;
378 }
379 }
380 }
381}
382
383static llvm::ErrorOr<std::string> findGcc(const llvm::Triple &T) {
384 llvm::SmallVector<llvm::SmallString<32>, 2> Gccs;
385 Gccs.emplace_back(T.getArchName());
386 Gccs[0] += "-w64-mingw32-gcc";
387 Gccs.emplace_back("mingw32-gcc");
388 // Please do not add "gcc" here
389 for (StringRef CandidateGcc : Gccs)
390 if (llvm::ErrorOr<std::string> GPPName = llvm::sys::findProgramByName(CandidateGcc))
391 return GPPName;
392 return make_error_code(std::errc::no_such_file_or_directory);
393}
394
395static llvm::ErrorOr<std::string>
396findClangRelativeSysroot(const Driver &D, const llvm::Triple &T,
397 std::string &SubdirName) {
398 llvm::SmallVector<llvm::SmallString<32>, 2> Subdirs;
399 Subdirs.emplace_back(T.str());
400 Subdirs.emplace_back(T.getArchName());
401 Subdirs[1] += "-w64-mingw32";
402 StringRef ClangRoot = llvm::sys::path::parent_path(D.getInstalledDir());
403 StringRef Sep = llvm::sys::path::get_separator();
404 for (StringRef CandidateSubdir : Subdirs) {
405 if (llvm::sys::fs::is_directory(ClangRoot + Sep + CandidateSubdir)) {
406 SubdirName = std::string(CandidateSubdir);
407 return (ClangRoot + Sep + CandidateSubdir).str();
408 }
409 }
410 return make_error_code(std::errc::no_such_file_or_directory);
411}
412
413toolchains::MinGW::MinGW(const Driver &D, const llvm::Triple &Triple,
414 const ArgList &Args)
415 : ToolChain(D, Triple, Args), CudaInstallation(D, Triple, Args),
416 RocmInstallation(D, Triple, Args) {
417 getProgramPaths().push_back(getDriver().getInstalledDir());
418
419 // The sequence for detecting a sysroot here should be kept in sync with
420 // the testTriple function below.
421 if (getDriver().SysRoot.size())
422 Base = getDriver().SysRoot;
423 // Look for <clang-bin>/../<triplet>; if found, use <clang-bin>/.. as the
424 // base as it could still be a base for a gcc setup with libgcc.
425 else if (llvm::ErrorOr<std::string> TargetSubdir =
426 findClangRelativeSysroot(getDriver(), getTriple(), SubdirName))
427 Base = std::string(llvm::sys::path::parent_path(TargetSubdir.get()));
428 else if (llvm::ErrorOr<std::string> GPPName = findGcc(getTriple()))
429 Base = std::string(llvm::sys::path::parent_path(
430 llvm::sys::path::parent_path(GPPName.get())));
431 else
432 Base = std::string(
433 llvm::sys::path::parent_path(getDriver().getInstalledDir()));
434
435 Base += llvm::sys::path::get_separator();
436 findGccLibDir();
437 // GccLibDir must precede Base/lib so that the
438 // correct crtbegin.o ,cetend.o would be found.
439 getFilePaths().push_back(GccLibDir);
440 getFilePaths().push_back(
441 (Base + SubdirName + llvm::sys::path::get_separator() + "lib").str());
442
443 // Gentoo
444 getFilePaths().push_back(
445 (Base + SubdirName + llvm::sys::path::get_separator() + "mingw/lib").str());
446
447 getFilePaths().push_back(Base + "lib");
448 // openSUSE
449 getFilePaths().push_back(Base + SubdirName + "/sys-root/mingw/lib");
450
451 NativeLLVMSupport =
452 Args.getLastArgValue(options::OPT_fuse_ld_EQ, CLANG_DEFAULT_LINKER"ld")
453 .equals_insensitive("lld");
454}
455
456bool toolchains::MinGW::IsIntegratedAssemblerDefault() const { return true; }
457
458Tool *toolchains::MinGW::getTool(Action::ActionClass AC) const {
459 switch (AC) {
460 case Action::PreprocessJobClass:
461 if (!Preprocessor)
462 Preprocessor.reset(new tools::gcc::Preprocessor(*this));
463 return Preprocessor.get();
464 case Action::CompileJobClass:
465 if (!Compiler)
466 Compiler.reset(new tools::gcc::Compiler(*this));
467 return Compiler.get();
468 default:
469 return ToolChain::getTool(AC);
470 }
471}
472
473Tool *toolchains::MinGW::buildAssembler() const {
474 return new tools::MinGW::Assembler(*this);
475}
476
477Tool *toolchains::MinGW::buildLinker() const {
478 return new tools::MinGW::Linker(*this);
479}
480
481bool toolchains::MinGW::HasNativeLLVMSupport() const {
482 return NativeLLVMSupport;
483}
484
485bool toolchains::MinGW::IsUnwindTablesDefault(const ArgList &Args) const {
486 Arg *ExceptionArg = Args.getLastArg(options::OPT_fsjlj_exceptions,
487 options::OPT_fseh_exceptions,
488 options::OPT_fdwarf_exceptions);
489 if (ExceptionArg &&
490 ExceptionArg->getOption().matches(options::OPT_fseh_exceptions))
491 return true;
492 return getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::arm ||
493 getArch() == llvm::Triple::thumb || getArch() == llvm::Triple::aarch64;
494}
495
496bool toolchains::MinGW::isPICDefault() const {
497 return getArch() == llvm::Triple::x86_64 ||
498 getArch() == llvm::Triple::aarch64;
499}
500
501bool toolchains::MinGW::isPIEDefault(const llvm::opt::ArgList &Args) const {
502 return false;
503}
504
505bool toolchains::MinGW::isPICDefaultForced() const { return true; }
506
507llvm::ExceptionHandling
508toolchains::MinGW::GetExceptionModel(const ArgList &Args) const {
509 if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::aarch64 ||
510 getArch() == llvm::Triple::arm || getArch() == llvm::Triple::thumb)
511 return llvm::ExceptionHandling::WinEH;
512 return llvm::ExceptionHandling::DwarfCFI;
513}
514
515SanitizerMask toolchains::MinGW::getSupportedSanitizers() const {
516 SanitizerMask Res = ToolChain::getSupportedSanitizers();
517 Res |= SanitizerKind::Address;
518 Res |= SanitizerKind::PointerCompare;
519 Res |= SanitizerKind::PointerSubtract;
520 Res |= SanitizerKind::Vptr;
521 return Res;
522}
523
524void toolchains::MinGW::AddCudaIncludeArgs(const ArgList &DriverArgs,
525 ArgStringList &CC1Args) const {
526 CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args);
527}
528
529void toolchains::MinGW::AddHIPIncludeArgs(const ArgList &DriverArgs,
530 ArgStringList &CC1Args) const {
531 RocmInstallation.AddHIPIncludeArgs(DriverArgs, CC1Args);
532}
533
534void toolchains::MinGW::printVerboseInfo(raw_ostream &OS) const {
535 CudaInstallation.print(OS);
536 RocmInstallation.print(OS);
537}
538
539// Include directories for various hosts:
540
541// Windows, mingw.org
542// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++
543// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\mingw32
544// c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\backward
545// c:\mingw\include
546// c:\mingw\mingw32\include
547
548// Windows, mingw-w64 mingw-builds
549// c:\mingw32\i686-w64-mingw32\include
550// c:\mingw32\i686-w64-mingw32\include\c++
551// c:\mingw32\i686-w64-mingw32\include\c++\i686-w64-mingw32
552// c:\mingw32\i686-w64-mingw32\include\c++\backward
553
554// Windows, mingw-w64 msys2
555// c:\msys64\mingw32\include
556// c:\msys64\mingw32\i686-w64-mingw32\include
557// c:\msys64\mingw32\include\c++\4.9.2
558// c:\msys64\mingw32\include\c++\4.9.2\i686-w64-mingw32
559// c:\msys64\mingw32\include\c++\4.9.2\backward
560
561// openSUSE
562// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++
563// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/x86_64-w64-mingw32
564// /usr/lib64/gcc/x86_64-w64-mingw32/5.1.0/include/c++/backward
565// /usr/x86_64-w64-mingw32/sys-root/mingw/include
566
567// Arch Linux
568// /usr/i686-w64-mingw32/include/c++/5.1.0
569// /usr/i686-w64-mingw32/include/c++/5.1.0/i686-w64-mingw32
570// /usr/i686-w64-mingw32/include/c++/5.1.0/backward
571// /usr/i686-w64-mingw32/include
572
573// Ubuntu
574// /usr/include/c++/4.8
575// /usr/include/c++/4.8/x86_64-w64-mingw32
576// /usr/include/c++/4.8/backward
577// /usr/x86_64-w64-mingw32/include
578
579void toolchains::MinGW::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
580 ArgStringList &CC1Args) const {
581 if (DriverArgs.hasArg(options::OPT_nostdinc))
582 return;
583
584 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
585 SmallString<1024> P(getDriver().ResourceDir);
586 llvm::sys::path::append(P, "include");
587 addSystemInclude(DriverArgs, CC1Args, P.str());
588 }
589
590 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
591 return;
592
593 if (GetRuntimeLibType(DriverArgs) == ToolChain::RLT_Libgcc) {
594 // openSUSE
595 addSystemInclude(DriverArgs, CC1Args,
596 Base + SubdirName + "/sys-root/mingw/include");
597 }
598
599 addSystemInclude(DriverArgs, CC1Args,
600 Base + SubdirName + llvm::sys::path::get_separator() +
601 "include");
602
603 // Gentoo
604 addSystemInclude(DriverArgs, CC1Args,
605 Base + SubdirName + llvm::sys::path::get_separator() + "usr/include");
606
607 addSystemInclude(DriverArgs, CC1Args, Base + "include");
608}
609
610void toolchains::MinGW::AddClangCXXStdlibIncludeArgs(
611 const ArgList &DriverArgs, ArgStringList &CC1Args) const {
612 if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
613 DriverArgs.hasArg(options::OPT_nostdincxx))
614 return;
615
616 StringRef Slash = llvm::sys::path::get_separator();
617
618 switch (GetCXXStdlibType(DriverArgs)) {
619 case ToolChain::CST_Libcxx: {
620 std::string TargetDir = (Base + "include" + Slash + getTripleString() +
621 Slash + "c++" + Slash + "v1")
622 .str();
623 if (getDriver().getVFS().exists(TargetDir))
624 addSystemInclude(DriverArgs, CC1Args, TargetDir);
625 addSystemInclude(DriverArgs, CC1Args,
626 Base + SubdirName + Slash + "include" + Slash + "c++" +
627 Slash + "v1");
628 addSystemInclude(DriverArgs, CC1Args,
629 Base + "include" + Slash + "c++" + Slash + "v1");
630 break;
631 }
632
633 case ToolChain::CST_Libstdcxx:
634 llvm::SmallVector<llvm::SmallString<1024>, 7> CppIncludeBases;
635 CppIncludeBases.emplace_back(Base);
636 llvm::sys::path::append(CppIncludeBases[0], SubdirName, "include", "c++");
637 CppIncludeBases.emplace_back(Base);
638 llvm::sys::path::append(CppIncludeBases[1], SubdirName, "include", "c++",
639 Ver);
640 CppIncludeBases.emplace_back(Base);
641 llvm::sys::path::append(CppIncludeBases[2], "include", "c++", Ver);
642 CppIncludeBases.emplace_back(GccLibDir);
643 llvm::sys::path::append(CppIncludeBases[3], "include", "c++");
644 CppIncludeBases.emplace_back(GccLibDir);
645 llvm::sys::path::append(CppIncludeBases[4], "include",
646 "g++-v" + GccVer.Text);
647 CppIncludeBases.emplace_back(GccLibDir);
648 llvm::sys::path::append(CppIncludeBases[5], "include",
649 "g++-v" + GccVer.MajorStr + "." + GccVer.MinorStr);
650 CppIncludeBases.emplace_back(GccLibDir);
651 llvm::sys::path::append(CppIncludeBases[6], "include",
652 "g++-v" + GccVer.MajorStr);
653 for (auto &CppIncludeBase : CppIncludeBases) {
654 addSystemInclude(DriverArgs, CC1Args, CppIncludeBase);
655 CppIncludeBase += Slash;
656 addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + SubdirName);
657 addSystemInclude(DriverArgs, CC1Args, CppIncludeBase + "backward");
658 }
659 break;
660 }
661}
662
663static bool testTriple(const Driver &D, const llvm::Triple &Triple,
664 const ArgList &Args) {
665 // If an explicit sysroot is set, that will be used and we shouldn't try to
666 // detect anything else.
667 std::string SubdirName;
668 if (D.SysRoot.size())
669 return true;
670 if (llvm::ErrorOr<std::string> TargetSubdir =
671 findClangRelativeSysroot(D, Triple, SubdirName))
672 return true;
673 if (llvm::ErrorOr<std::string> GPPName = findGcc(Triple))
674 return true;
675 // If we neither found a colocated sysroot or a matching gcc executable,
676 // conclude that we can't know if this is the correct spelling of the triple.
677 return false;
678}
679
680static llvm::Triple adjustTriple(const Driver &D, const llvm::Triple &Triple,
681 const ArgList &Args) {
682 // First test if the original triple can find a sysroot with the triple
683 // name.
684 if (testTriple(D, Triple, Args))
685 return Triple;
686 llvm::SmallVector<llvm::StringRef, 3> Archs;
687 // If not, test a couple other possible arch names that might be what was
688 // intended.
689 if (Triple.getArch() == llvm::Triple::x86) {
690 Archs.emplace_back("i386");
691 Archs.emplace_back("i586");
692 Archs.emplace_back("i686");
693 } else if (Triple.getArch() == llvm::Triple::arm ||
694 Triple.getArch() == llvm::Triple::thumb) {
695 Archs.emplace_back("armv7");
696 }
697 for (auto A : Archs) {
698 llvm::Triple TestTriple(Triple);
699 TestTriple.setArchName(A);
700 if (testTriple(D, TestTriple, Args))
701 return TestTriple;
702 }
703 // If none was found, just proceed with the original value.
704 return Triple;
705}
706
707void toolchains::MinGW::fixTripleArch(const Driver &D, llvm::Triple &Triple,
708 const ArgList &Args) {
709 if (Triple.getArch() == llvm::Triple::x86 ||
710 Triple.getArch() == llvm::Triple::arm ||
711 Triple.getArch() == llvm::Triple::thumb)
712 Triple = adjustTriple(D, Triple, Args);
713}