1 //===--- Gnu.cpp - Gnu Tool and ToolChain Implementations -------*- C++ -*-===//
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 "Gnu.h"
10 #include "Arch/ARM.h"
11 #include "Arch/CSKY.h"
12 #include "Arch/Mips.h"
13 #include "Arch/PPC.h"
14 #include "Arch/RISCV.h"
15 #include "Arch/Sparc.h"
16 #include "Arch/SystemZ.h"
17 #include "CommonArgs.h"
18 #include "Linux.h"
19 #include "clang/Config/config.h" // for GCC_INSTALL_PREFIX
20 #include "clang/Driver/Compilation.h"
21 #include "clang/Driver/Driver.h"
22 #include "clang/Driver/DriverDiagnostic.h"
23 #include "clang/Driver/Options.h"
24 #include "clang/Driver/Tool.h"
25 #include "clang/Driver/ToolChain.h"
26 #include "llvm/ADT/StringSet.h"
27 #include "llvm/ADT/Twine.h"
28 #include "llvm/Option/ArgList.h"
29 #include "llvm/Support/CodeGen.h"
30 #include "llvm/Support/Path.h"
31 #include "llvm/Support/TargetParser.h"
32 #include "llvm/Support/VirtualFileSystem.h"
33 #include <system_error>
34
35 using namespace clang::driver;
36 using namespace clang::driver::toolchains;
37 using namespace clang;
38 using namespace llvm::opt;
39
40 using tools::addMultilibFlag;
41 using tools::addPathIfExists;
42
forwardToGCC(const Option & O)43 static bool forwardToGCC(const Option &O) {
44 // LinkerInput options have been forwarded. Don't duplicate.
45 if (O.hasFlag(options::LinkerInput))
46 return false;
47 return O.matches(options::OPT_Link_Group) || O.hasFlag(options::LinkOption);
48 }
49
50 // Switch CPU names not recognized by GNU assembler to a close CPU that it does
51 // recognize, instead of a lower march from being picked in the absence of a cpu
52 // flag.
normalizeCPUNamesForAssembler(const ArgList & Args,ArgStringList & CmdArgs)53 static void normalizeCPUNamesForAssembler(const ArgList &Args,
54 ArgStringList &CmdArgs) {
55 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
56 StringRef CPUArg(A->getValue());
57 if (CPUArg.equals_insensitive("krait"))
58 CmdArgs.push_back("-mcpu=cortex-a15");
59 else if (CPUArg.equals_insensitive("kryo"))
60 CmdArgs.push_back("-mcpu=cortex-a57");
61 else
62 Args.AddLastArg(CmdArgs, options::OPT_mcpu_EQ);
63 }
64 }
65
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const66 void tools::gcc::Common::ConstructJob(Compilation &C, const JobAction &JA,
67 const InputInfo &Output,
68 const InputInfoList &Inputs,
69 const ArgList &Args,
70 const char *LinkingOutput) const {
71 const Driver &D = getToolChain().getDriver();
72 ArgStringList CmdArgs;
73
74 for (const auto &A : Args) {
75 if (forwardToGCC(A->getOption())) {
76 // It is unfortunate that we have to claim here, as this means
77 // we will basically never report anything interesting for
78 // platforms using a generic gcc, even if we are just using gcc
79 // to get to the assembler.
80 A->claim();
81
82 A->render(Args, CmdArgs);
83 }
84 }
85
86 RenderExtraToolArgs(JA, CmdArgs);
87
88 // If using a driver, force the arch.
89 if (getToolChain().getTriple().isOSDarwin()) {
90 CmdArgs.push_back("-arch");
91 CmdArgs.push_back(
92 Args.MakeArgString(getToolChain().getDefaultUniversalArchName()));
93 }
94
95 // Try to force gcc to match the tool chain we want, if we recognize
96 // the arch.
97 //
98 // FIXME: The triple class should directly provide the information we want
99 // here.
100 switch (getToolChain().getArch()) {
101 default:
102 break;
103 case llvm::Triple::x86:
104 case llvm::Triple::ppc:
105 case llvm::Triple::ppcle:
106 CmdArgs.push_back("-m32");
107 break;
108 case llvm::Triple::x86_64:
109 case llvm::Triple::ppc64:
110 case llvm::Triple::ppc64le:
111 CmdArgs.push_back("-m64");
112 break;
113 case llvm::Triple::sparcel:
114 CmdArgs.push_back("-EL");
115 break;
116 }
117
118 if (Output.isFilename()) {
119 CmdArgs.push_back("-o");
120 CmdArgs.push_back(Output.getFilename());
121 } else {
122 assert(Output.isNothing() && "Unexpected output");
123 CmdArgs.push_back("-fsyntax-only");
124 }
125
126 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
127
128 // Only pass -x if gcc will understand it; otherwise hope gcc
129 // understands the suffix correctly. The main use case this would go
130 // wrong in is for linker inputs if they happened to have an odd
131 // suffix; really the only way to get this to happen is a command
132 // like '-x foobar a.c' which will treat a.c like a linker input.
133 //
134 // FIXME: For the linker case specifically, can we safely convert
135 // inputs into '-Wl,' options?
136 for (const auto &II : Inputs) {
137 // Don't try to pass LLVM or AST inputs to a generic gcc.
138 if (types::isLLVMIR(II.getType()))
139 D.Diag(clang::diag::err_drv_no_linker_llvm_support)
140 << getToolChain().getTripleString();
141 else if (II.getType() == types::TY_AST)
142 D.Diag(diag::err_drv_no_ast_support) << getToolChain().getTripleString();
143 else if (II.getType() == types::TY_ModuleFile)
144 D.Diag(diag::err_drv_no_module_support)
145 << getToolChain().getTripleString();
146
147 if (types::canTypeBeUserSpecified(II.getType())) {
148 CmdArgs.push_back("-x");
149 CmdArgs.push_back(types::getTypeName(II.getType()));
150 }
151
152 if (II.isFilename())
153 CmdArgs.push_back(II.getFilename());
154 else {
155 const Arg &A = II.getInputArg();
156
157 // Reverse translate some rewritten options.
158 if (A.getOption().matches(options::OPT_Z_reserved_lib_stdcxx)) {
159 CmdArgs.push_back("-lstdc++");
160 continue;
161 }
162
163 // Don't render as input, we need gcc to do the translations.
164 A.render(Args, CmdArgs);
165 }
166 }
167
168 const std::string &customGCCName = D.getCCCGenericGCCName();
169 const char *GCCName;
170 if (!customGCCName.empty())
171 GCCName = customGCCName.c_str();
172 else if (D.CCCIsCXX()) {
173 GCCName = "g++";
174 } else
175 GCCName = "gcc";
176
177 const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath(GCCName));
178 C.addCommand(std::make_unique<Command>(JA, *this,
179 ResponseFileSupport::AtFileCurCP(),
180 Exec, CmdArgs, Inputs, Output));
181 }
182
RenderExtraToolArgs(const JobAction & JA,ArgStringList & CmdArgs) const183 void tools::gcc::Preprocessor::RenderExtraToolArgs(
184 const JobAction &JA, ArgStringList &CmdArgs) const {
185 CmdArgs.push_back("-E");
186 }
187
RenderExtraToolArgs(const JobAction & JA,ArgStringList & CmdArgs) const188 void tools::gcc::Compiler::RenderExtraToolArgs(const JobAction &JA,
189 ArgStringList &CmdArgs) const {
190 const Driver &D = getToolChain().getDriver();
191
192 switch (JA.getType()) {
193 // If -flto, etc. are present then make sure not to force assembly output.
194 case types::TY_LLVM_IR:
195 case types::TY_LTO_IR:
196 case types::TY_LLVM_BC:
197 case types::TY_LTO_BC:
198 CmdArgs.push_back("-c");
199 break;
200 // We assume we've got an "integrated" assembler in that gcc will produce an
201 // object file itself.
202 case types::TY_Object:
203 CmdArgs.push_back("-c");
204 break;
205 case types::TY_PP_Asm:
206 CmdArgs.push_back("-S");
207 break;
208 case types::TY_Nothing:
209 CmdArgs.push_back("-fsyntax-only");
210 break;
211 default:
212 D.Diag(diag::err_drv_invalid_gcc_output_type) << getTypeName(JA.getType());
213 }
214 }
215
RenderExtraToolArgs(const JobAction & JA,ArgStringList & CmdArgs) const216 void tools::gcc::Linker::RenderExtraToolArgs(const JobAction &JA,
217 ArgStringList &CmdArgs) const {
218 // The types are (hopefully) good enough.
219 }
220
221 // On Arm the endianness of the output file is determined by the target and
222 // can be overridden by the pseudo-target flags '-mlittle-endian'/'-EL' and
223 // '-mbig-endian'/'-EB'. Unlike other targets the flag does not result in a
224 // normalized triple so we must handle the flag here.
isArmBigEndian(const llvm::Triple & Triple,const ArgList & Args)225 static bool isArmBigEndian(const llvm::Triple &Triple,
226 const ArgList &Args) {
227 bool IsBigEndian = false;
228 switch (Triple.getArch()) {
229 case llvm::Triple::armeb:
230 case llvm::Triple::thumbeb:
231 IsBigEndian = true;
232 [[fallthrough]];
233 case llvm::Triple::arm:
234 case llvm::Triple::thumb:
235 if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
236 options::OPT_mbig_endian))
237 IsBigEndian = !A->getOption().matches(options::OPT_mlittle_endian);
238 break;
239 default:
240 break;
241 }
242 return IsBigEndian;
243 }
244
getLDMOption(const llvm::Triple & T,const ArgList & Args)245 static const char *getLDMOption(const llvm::Triple &T, const ArgList &Args) {
246 switch (T.getArch()) {
247 case llvm::Triple::x86:
248 if (T.isOSIAMCU())
249 return "elf_iamcu";
250 return "elf_i386";
251 case llvm::Triple::aarch64:
252 return "aarch64linux";
253 case llvm::Triple::aarch64_be:
254 return "aarch64linuxb";
255 case llvm::Triple::arm:
256 case llvm::Triple::thumb:
257 case llvm::Triple::armeb:
258 case llvm::Triple::thumbeb:
259 return isArmBigEndian(T, Args) ? "armelfb_linux_eabi" : "armelf_linux_eabi";
260 case llvm::Triple::m68k:
261 return "m68kelf";
262 case llvm::Triple::ppc:
263 if (T.isOSLinux())
264 return "elf32ppclinux";
265 return "elf32ppc";
266 case llvm::Triple::ppcle:
267 if (T.isOSLinux())
268 return "elf32lppclinux";
269 return "elf32lppc";
270 case llvm::Triple::ppc64:
271 return "elf64ppc";
272 case llvm::Triple::ppc64le:
273 return "elf64lppc";
274 case llvm::Triple::riscv32:
275 return "elf32lriscv";
276 case llvm::Triple::riscv64:
277 return "elf64lriscv";
278 case llvm::Triple::sparc:
279 case llvm::Triple::sparcel:
280 return "elf32_sparc";
281 case llvm::Triple::sparcv9:
282 return "elf64_sparc";
283 case llvm::Triple::loongarch32:
284 return "elf32loongarch";
285 case llvm::Triple::loongarch64:
286 return "elf64loongarch";
287 case llvm::Triple::mips:
288 return "elf32btsmip";
289 case llvm::Triple::mipsel:
290 return "elf32ltsmip";
291 case llvm::Triple::mips64:
292 if (tools::mips::hasMipsAbiArg(Args, "n32") ||
293 T.getEnvironment() == llvm::Triple::GNUABIN32)
294 return "elf32btsmipn32";
295 return "elf64btsmip";
296 case llvm::Triple::mips64el:
297 if (tools::mips::hasMipsAbiArg(Args, "n32") ||
298 T.getEnvironment() == llvm::Triple::GNUABIN32)
299 return "elf32ltsmipn32";
300 return "elf64ltsmip";
301 case llvm::Triple::systemz:
302 return "elf64_s390";
303 case llvm::Triple::x86_64:
304 if (T.isX32())
305 return "elf32_x86_64";
306 return "elf_x86_64";
307 case llvm::Triple::ve:
308 return "elf64ve";
309 case llvm::Triple::csky:
310 return "cskyelf_linux";
311 default:
312 return nullptr;
313 }
314 }
315
getPIE(const ArgList & Args,const ToolChain & TC)316 static bool getPIE(const ArgList &Args, const ToolChain &TC) {
317 if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_static) ||
318 Args.hasArg(options::OPT_r) || Args.hasArg(options::OPT_static_pie))
319 return false;
320
321 Arg *A = Args.getLastArg(options::OPT_pie, options::OPT_no_pie,
322 options::OPT_nopie);
323 if (!A)
324 return TC.isPIEDefault(Args);
325 return A->getOption().matches(options::OPT_pie);
326 }
327
getStaticPIE(const ArgList & Args,const ToolChain & TC)328 static bool getStaticPIE(const ArgList &Args, const ToolChain &TC) {
329 bool HasStaticPIE = Args.hasArg(options::OPT_static_pie);
330 // -no-pie is an alias for -nopie. So, handling -nopie takes care of
331 // -no-pie as well.
332 if (HasStaticPIE && Args.hasArg(options::OPT_nopie)) {
333 const Driver &D = TC.getDriver();
334 const llvm::opt::OptTable &Opts = D.getOpts();
335 StringRef StaticPIEName = Opts.getOptionName(options::OPT_static_pie);
336 StringRef NoPIEName = Opts.getOptionName(options::OPT_nopie);
337 D.Diag(diag::err_drv_cannot_mix_options) << StaticPIEName << NoPIEName;
338 }
339 return HasStaticPIE;
340 }
341
getStatic(const ArgList & Args)342 static bool getStatic(const ArgList &Args) {
343 return Args.hasArg(options::OPT_static) &&
344 !Args.hasArg(options::OPT_static_pie);
345 }
346
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const347 void tools::gnutools::StaticLibTool::ConstructJob(
348 Compilation &C, const JobAction &JA, const InputInfo &Output,
349 const InputInfoList &Inputs, const ArgList &Args,
350 const char *LinkingOutput) const {
351 const Driver &D = getToolChain().getDriver();
352
353 // Silence warning for "clang -g foo.o -o foo"
354 Args.ClaimAllArgs(options::OPT_g_Group);
355 // and "clang -emit-llvm foo.o -o foo"
356 Args.ClaimAllArgs(options::OPT_emit_llvm);
357 // and for "clang -w foo.o -o foo". Other warning options are already
358 // handled somewhere else.
359 Args.ClaimAllArgs(options::OPT_w);
360 // Silence warnings when linking C code with a C++ '-stdlib' argument.
361 Args.ClaimAllArgs(options::OPT_stdlib_EQ);
362
363 // ar tool command "llvm-ar <options> <output_file> <input_files>".
364 ArgStringList CmdArgs;
365 // Create and insert file members with a deterministic index.
366 CmdArgs.push_back("rcsD");
367 CmdArgs.push_back(Output.getFilename());
368
369 for (const auto &II : Inputs) {
370 if (II.isFilename()) {
371 CmdArgs.push_back(II.getFilename());
372 }
373 }
374
375 // Delete old output archive file if it already exists before generating a new
376 // archive file.
377 auto OutputFileName = Output.getFilename();
378 if (Output.isFilename() && llvm::sys::fs::exists(OutputFileName)) {
379 if (std::error_code EC = llvm::sys::fs::remove(OutputFileName)) {
380 D.Diag(diag::err_drv_unable_to_remove_file) << EC.message();
381 return;
382 }
383 }
384
385 const char *Exec = Args.MakeArgString(getToolChain().GetStaticLibToolPath());
386 C.addCommand(std::make_unique<Command>(JA, *this,
387 ResponseFileSupport::AtFileCurCP(),
388 Exec, CmdArgs, Inputs, Output));
389 }
390
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const391 void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
392 const InputInfo &Output,
393 const InputInfoList &Inputs,
394 const ArgList &Args,
395 const char *LinkingOutput) const {
396 // FIXME: The Linker class constructor takes a ToolChain and not a
397 // Generic_ELF, so the static_cast might return a reference to a invalid
398 // instance (see PR45061). Ideally, the Linker constructor needs to take a
399 // Generic_ELF instead.
400 const toolchains::Generic_ELF &ToolChain =
401 static_cast<const toolchains::Generic_ELF &>(getToolChain());
402 const Driver &D = ToolChain.getDriver();
403
404 const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
405
406 const llvm::Triple::ArchType Arch = ToolChain.getArch();
407 const bool isAndroid = ToolChain.getTriple().isAndroid();
408 const bool IsIAMCU = ToolChain.getTriple().isOSIAMCU();
409 const bool IsVE = ToolChain.getTriple().isVE();
410 const bool IsPIE = getPIE(Args, ToolChain);
411 const bool IsStaticPIE = getStaticPIE(Args, ToolChain);
412 const bool IsStatic = getStatic(Args);
413 const bool HasCRTBeginEndFiles =
414 ToolChain.getTriple().hasEnvironment() ||
415 (ToolChain.getTriple().getVendor() != llvm::Triple::MipsTechnologies);
416
417 ArgStringList CmdArgs;
418
419 // Silence warning for "clang -g foo.o -o foo"
420 Args.ClaimAllArgs(options::OPT_g_Group);
421 // and "clang -emit-llvm foo.o -o foo"
422 Args.ClaimAllArgs(options::OPT_emit_llvm);
423 // and for "clang -w foo.o -o foo". Other warning options are already
424 // handled somewhere else.
425 Args.ClaimAllArgs(options::OPT_w);
426
427 if (!D.SysRoot.empty())
428 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
429
430 if (IsPIE)
431 CmdArgs.push_back("-pie");
432
433 if (IsStaticPIE) {
434 CmdArgs.push_back("-static");
435 CmdArgs.push_back("-pie");
436 CmdArgs.push_back("--no-dynamic-linker");
437 CmdArgs.push_back("-z");
438 CmdArgs.push_back("text");
439 }
440
441 if (Args.hasArg(options::OPT_rdynamic))
442 CmdArgs.push_back("-export-dynamic");
443
444 if (Args.hasArg(options::OPT_s))
445 CmdArgs.push_back("-s");
446
447 if (Triple.isARM() || Triple.isThumb() || Triple.isAArch64()) {
448 bool IsBigEndian = isArmBigEndian(Triple, Args);
449 if (IsBigEndian)
450 arm::appendBE8LinkFlag(Args, CmdArgs, Triple);
451 IsBigEndian = IsBigEndian || Arch == llvm::Triple::aarch64_be;
452 CmdArgs.push_back(IsBigEndian ? "-EB" : "-EL");
453 }
454
455 // Most Android ARM64 targets should enable the linker fix for erratum
456 // 843419. Only non-Cortex-A53 devices are allowed to skip this flag.
457 if (Arch == llvm::Triple::aarch64 && isAndroid) {
458 std::string CPU = getCPUName(D, Args, Triple);
459 if (CPU.empty() || CPU == "generic" || CPU == "cortex-a53")
460 CmdArgs.push_back("--fix-cortex-a53-843419");
461 }
462
463 ToolChain.addExtraOpts(CmdArgs);
464
465 CmdArgs.push_back("--eh-frame-hdr");
466
467 if (const char *LDMOption = getLDMOption(ToolChain.getTriple(), Args)) {
468 CmdArgs.push_back("-m");
469 CmdArgs.push_back(LDMOption);
470 } else {
471 D.Diag(diag::err_target_unknown_triple) << Triple.str();
472 return;
473 }
474 if (Triple.isRISCV())
475 CmdArgs.push_back("-X");
476
477 if (Args.hasArg(options::OPT_shared))
478 CmdArgs.push_back("-shared");
479
480 if (IsStatic) {
481 CmdArgs.push_back("-static");
482 } else {
483 if (Args.hasArg(options::OPT_rdynamic))
484 CmdArgs.push_back("-export-dynamic");
485
486 if (!Args.hasArg(options::OPT_shared) && !IsStaticPIE &&
487 !Args.hasArg(options::OPT_r)) {
488 CmdArgs.push_back("-dynamic-linker");
489 CmdArgs.push_back(Args.MakeArgString(Twine(D.DyldPrefix) +
490 ToolChain.getDynamicLinker(Args)));
491 }
492 }
493
494 CmdArgs.push_back("-o");
495 CmdArgs.push_back(Output.getFilename());
496
497 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
498 options::OPT_r)) {
499 if (!isAndroid && !IsIAMCU) {
500 const char *crt1 = nullptr;
501 if (!Args.hasArg(options::OPT_shared)) {
502 if (Args.hasArg(options::OPT_pg))
503 crt1 = "gcrt1.o";
504 else if (IsPIE)
505 crt1 = "Scrt1.o";
506 else if (IsStaticPIE)
507 crt1 = "rcrt1.o";
508 else
509 crt1 = "crt1.o";
510 }
511 if (crt1)
512 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt1)));
513
514 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
515 }
516
517 if (IsVE) {
518 CmdArgs.push_back("-z");
519 CmdArgs.push_back("max-page-size=0x4000000");
520 }
521
522 if (IsIAMCU)
523 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
524 else if (HasCRTBeginEndFiles) {
525 std::string P;
526 if (ToolChain.GetRuntimeLibType(Args) == ToolChain::RLT_CompilerRT &&
527 !isAndroid) {
528 std::string crtbegin = ToolChain.getCompilerRT(Args, "crtbegin",
529 ToolChain::FT_Object);
530 if (ToolChain.getVFS().exists(crtbegin))
531 P = crtbegin;
532 }
533 if (P.empty()) {
534 const char *crtbegin;
535 if (Args.hasArg(options::OPT_shared))
536 crtbegin = isAndroid ? "crtbegin_so.o" : "crtbeginS.o";
537 else if (IsStatic)
538 crtbegin = isAndroid ? "crtbegin_static.o" : "crtbeginT.o";
539 else if (IsPIE || IsStaticPIE)
540 crtbegin = isAndroid ? "crtbegin_dynamic.o" : "crtbeginS.o";
541 else
542 crtbegin = isAndroid ? "crtbegin_dynamic.o" : "crtbegin.o";
543 P = ToolChain.GetFilePath(crtbegin);
544 }
545 CmdArgs.push_back(Args.MakeArgString(P));
546 }
547
548 // Add crtfastmath.o if available and fast math is enabled.
549 ToolChain.addFastMathRuntimeIfAvailable(Args, CmdArgs);
550 }
551
552 Args.AddAllArgs(CmdArgs, options::OPT_L);
553 Args.AddAllArgs(CmdArgs, options::OPT_u);
554
555 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
556
557 if (D.isUsingLTO()) {
558 assert(!Inputs.empty() && "Must have at least one input.");
559 addLTOOptions(ToolChain, Args, CmdArgs, Output, Inputs[0],
560 D.getLTOMode() == LTOK_Thin);
561 }
562
563 if (Args.hasArg(options::OPT_Z_Xlinker__no_demangle))
564 CmdArgs.push_back("--no-demangle");
565
566 bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
567 bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
568 addLinkerCompressDebugSectionsOption(ToolChain, Args, CmdArgs);
569 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
570
571 addHIPRuntimeLibArgs(ToolChain, Args, CmdArgs);
572
573 // The profile runtime also needs access to system libraries.
574 getToolChain().addProfileRTLibs(Args, CmdArgs);
575
576 if (D.CCCIsCXX() &&
577 !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
578 options::OPT_r)) {
579 if (ToolChain.ShouldLinkCXXStdlib(Args)) {
580 bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
581 !Args.hasArg(options::OPT_static);
582 if (OnlyLibstdcxxStatic)
583 CmdArgs.push_back("-Bstatic");
584 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
585 if (OnlyLibstdcxxStatic)
586 CmdArgs.push_back("-Bdynamic");
587 }
588 CmdArgs.push_back("-lm");
589 }
590
591 // Silence warnings when linking C code with a C++ '-stdlib' argument.
592 Args.ClaimAllArgs(options::OPT_stdlib_EQ);
593
594 // Additional linker set-up and flags for Fortran. This is required in order
595 // to generate executables. As Fortran runtime depends on the C runtime,
596 // these dependencies need to be listed before the C runtime below (i.e.
597 // AddRuntTimeLibs).
598 if (D.IsFlangMode()) {
599 addFortranRuntimeLibraryPath(ToolChain, Args, CmdArgs);
600 addFortranRuntimeLibs(ToolChain, CmdArgs);
601 CmdArgs.push_back("-lm");
602 }
603
604 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_r)) {
605 if (!Args.hasArg(options::OPT_nodefaultlibs)) {
606 if (IsStatic || IsStaticPIE)
607 CmdArgs.push_back("--start-group");
608
609 if (NeedsSanitizerDeps)
610 linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
611
612 if (NeedsXRayDeps)
613 linkXRayRuntimeDeps(ToolChain, CmdArgs);
614
615 bool WantPthread = Args.hasArg(options::OPT_pthread) ||
616 Args.hasArg(options::OPT_pthreads);
617
618 // Use the static OpenMP runtime with -static-openmp
619 bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) &&
620 !Args.hasArg(options::OPT_static);
621
622 // FIXME: Only pass GompNeedsRT = true for platforms with libgomp that
623 // require librt. Most modern Linux platforms do, but some may not.
624 if (addOpenMPRuntime(CmdArgs, ToolChain, Args, StaticOpenMP,
625 JA.isHostOffloading(Action::OFK_OpenMP),
626 /* GompNeedsRT= */ true))
627 // OpenMP runtimes implies pthreads when using the GNU toolchain.
628 // FIXME: Does this really make sense for all GNU toolchains?
629 WantPthread = true;
630
631 AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
632
633 // LLVM support for atomics on 32-bit SPARC V8+ is incomplete, so
634 // forcibly link with libatomic as a workaround.
635 // TODO: Issue #41880 and D118021.
636 if (getToolChain().getTriple().getArch() == llvm::Triple::sparc) {
637 CmdArgs.push_back("--push-state");
638 CmdArgs.push_back("--as-needed");
639 CmdArgs.push_back("-latomic");
640 CmdArgs.push_back("--pop-state");
641 }
642
643 if (WantPthread && !isAndroid)
644 CmdArgs.push_back("-lpthread");
645
646 if (Args.hasArg(options::OPT_fsplit_stack))
647 CmdArgs.push_back("--wrap=pthread_create");
648
649 if (!Args.hasArg(options::OPT_nolibc))
650 CmdArgs.push_back("-lc");
651
652 // Add IAMCU specific libs, if needed.
653 if (IsIAMCU)
654 CmdArgs.push_back("-lgloss");
655
656 if (IsStatic || IsStaticPIE)
657 CmdArgs.push_back("--end-group");
658 else
659 AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
660
661 // Add IAMCU specific libs (outside the group), if needed.
662 if (IsIAMCU) {
663 CmdArgs.push_back("--as-needed");
664 CmdArgs.push_back("-lsoftfp");
665 CmdArgs.push_back("--no-as-needed");
666 }
667 }
668
669 if (!Args.hasArg(options::OPT_nostartfiles) && !IsIAMCU) {
670 if (HasCRTBeginEndFiles) {
671 std::string P;
672 if (ToolChain.GetRuntimeLibType(Args) == ToolChain::RLT_CompilerRT &&
673 !isAndroid) {
674 std::string crtend = ToolChain.getCompilerRT(Args, "crtend",
675 ToolChain::FT_Object);
676 if (ToolChain.getVFS().exists(crtend))
677 P = crtend;
678 }
679 if (P.empty()) {
680 const char *crtend;
681 if (Args.hasArg(options::OPT_shared))
682 crtend = isAndroid ? "crtend_so.o" : "crtendS.o";
683 else if (IsPIE || IsStaticPIE)
684 crtend = isAndroid ? "crtend_android.o" : "crtendS.o";
685 else
686 crtend = isAndroid ? "crtend_android.o" : "crtend.o";
687 P = ToolChain.GetFilePath(crtend);
688 }
689 CmdArgs.push_back(Args.MakeArgString(P));
690 }
691 if (!isAndroid)
692 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
693 }
694 }
695
696 Args.AddAllArgs(CmdArgs, options::OPT_T);
697
698 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
699 C.addCommand(std::make_unique<Command>(JA, *this,
700 ResponseFileSupport::AtFileCurCP(),
701 Exec, CmdArgs, Inputs, Output));
702 }
703
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const704 void tools::gnutools::Assembler::ConstructJob(Compilation &C,
705 const JobAction &JA,
706 const InputInfo &Output,
707 const InputInfoList &Inputs,
708 const ArgList &Args,
709 const char *LinkingOutput) const {
710 const auto &D = getToolChain().getDriver();
711
712 claimNoWarnArgs(Args);
713
714 ArgStringList CmdArgs;
715
716 llvm::Reloc::Model RelocationModel;
717 unsigned PICLevel;
718 bool IsPIE;
719 const char *DefaultAssembler = "as";
720 std::tie(RelocationModel, PICLevel, IsPIE) =
721 ParsePICArgs(getToolChain(), Args);
722
723 if (const Arg *A = Args.getLastArg(options::OPT_gz, options::OPT_gz_EQ)) {
724 if (A->getOption().getID() == options::OPT_gz) {
725 CmdArgs.push_back("--compress-debug-sections");
726 } else {
727 StringRef Value = A->getValue();
728 if (Value == "none" || Value == "zlib" || Value == "zstd") {
729 CmdArgs.push_back(
730 Args.MakeArgString("--compress-debug-sections=" + Twine(Value)));
731 } else {
732 D.Diag(diag::err_drv_unsupported_option_argument)
733 << A->getSpelling() << Value;
734 }
735 }
736 }
737
738 switch (getToolChain().getArch()) {
739 default:
740 break;
741 // Add --32/--64 to make sure we get the format we want.
742 // This is incomplete
743 case llvm::Triple::x86:
744 CmdArgs.push_back("--32");
745 break;
746 case llvm::Triple::x86_64:
747 if (getToolChain().getTriple().isX32())
748 CmdArgs.push_back("--x32");
749 else
750 CmdArgs.push_back("--64");
751 break;
752 case llvm::Triple::ppc: {
753 CmdArgs.push_back("-a32");
754 CmdArgs.push_back("-mppc");
755 CmdArgs.push_back("-mbig-endian");
756 CmdArgs.push_back(ppc::getPPCAsmModeForCPU(
757 getCPUName(D, Args, getToolChain().getTriple())));
758 break;
759 }
760 case llvm::Triple::ppcle: {
761 CmdArgs.push_back("-a32");
762 CmdArgs.push_back("-mppc");
763 CmdArgs.push_back("-mlittle-endian");
764 CmdArgs.push_back(ppc::getPPCAsmModeForCPU(
765 getCPUName(D, Args, getToolChain().getTriple())));
766 break;
767 }
768 case llvm::Triple::ppc64: {
769 CmdArgs.push_back("-a64");
770 CmdArgs.push_back("-mppc64");
771 CmdArgs.push_back("-mbig-endian");
772 CmdArgs.push_back(ppc::getPPCAsmModeForCPU(
773 getCPUName(D, Args, getToolChain().getTriple())));
774 break;
775 }
776 case llvm::Triple::ppc64le: {
777 CmdArgs.push_back("-a64");
778 CmdArgs.push_back("-mppc64");
779 CmdArgs.push_back("-mlittle-endian");
780 CmdArgs.push_back(ppc::getPPCAsmModeForCPU(
781 getCPUName(D, Args, getToolChain().getTriple())));
782 break;
783 }
784 case llvm::Triple::riscv32:
785 case llvm::Triple::riscv64: {
786 StringRef ABIName = riscv::getRISCVABI(Args, getToolChain().getTriple());
787 CmdArgs.push_back("-mabi");
788 CmdArgs.push_back(ABIName.data());
789 StringRef MArchName = riscv::getRISCVArch(Args, getToolChain().getTriple());
790 CmdArgs.push_back("-march");
791 CmdArgs.push_back(MArchName.data());
792 if (!Args.hasFlag(options::OPT_mrelax, options::OPT_mno_relax, true))
793 Args.addOptOutFlag(CmdArgs, options::OPT_mrelax, options::OPT_mno_relax);
794 break;
795 }
796 case llvm::Triple::sparc:
797 case llvm::Triple::sparcel: {
798 CmdArgs.push_back("-32");
799 std::string CPU = getCPUName(D, Args, getToolChain().getTriple());
800 CmdArgs.push_back(
801 sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
802 AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
803 break;
804 }
805 case llvm::Triple::sparcv9: {
806 CmdArgs.push_back("-64");
807 std::string CPU = getCPUName(D, Args, getToolChain().getTriple());
808 CmdArgs.push_back(
809 sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
810 AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
811 break;
812 }
813 case llvm::Triple::arm:
814 case llvm::Triple::armeb:
815 case llvm::Triple::thumb:
816 case llvm::Triple::thumbeb: {
817 const llvm::Triple &Triple2 = getToolChain().getTriple();
818 CmdArgs.push_back(isArmBigEndian(Triple2, Args) ? "-EB" : "-EL");
819 switch (Triple2.getSubArch()) {
820 case llvm::Triple::ARMSubArch_v7:
821 CmdArgs.push_back("-mfpu=neon");
822 break;
823 case llvm::Triple::ARMSubArch_v8:
824 CmdArgs.push_back("-mfpu=crypto-neon-fp-armv8");
825 break;
826 default:
827 break;
828 }
829
830 switch (arm::getARMFloatABI(getToolChain(), Args)) {
831 case arm::FloatABI::Invalid: llvm_unreachable("must have an ABI!");
832 case arm::FloatABI::Soft:
833 CmdArgs.push_back(Args.MakeArgString("-mfloat-abi=soft"));
834 break;
835 case arm::FloatABI::SoftFP:
836 CmdArgs.push_back(Args.MakeArgString("-mfloat-abi=softfp"));
837 break;
838 case arm::FloatABI::Hard:
839 CmdArgs.push_back(Args.MakeArgString("-mfloat-abi=hard"));
840 break;
841 }
842
843 Args.AddLastArg(CmdArgs, options::OPT_march_EQ);
844 normalizeCPUNamesForAssembler(Args, CmdArgs);
845
846 Args.AddLastArg(CmdArgs, options::OPT_mfpu_EQ);
847 break;
848 }
849 case llvm::Triple::aarch64:
850 case llvm::Triple::aarch64_be: {
851 CmdArgs.push_back(
852 getToolChain().getArch() == llvm::Triple::aarch64_be ? "-EB" : "-EL");
853 Args.AddLastArg(CmdArgs, options::OPT_march_EQ);
854 normalizeCPUNamesForAssembler(Args, CmdArgs);
855
856 break;
857 }
858 case llvm::Triple::mips:
859 case llvm::Triple::mipsel:
860 case llvm::Triple::mips64:
861 case llvm::Triple::mips64el: {
862 StringRef CPUName;
863 StringRef ABIName;
864 mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName);
865 ABIName = mips::getGnuCompatibleMipsABIName(ABIName);
866
867 CmdArgs.push_back("-march");
868 CmdArgs.push_back(CPUName.data());
869
870 CmdArgs.push_back("-mabi");
871 CmdArgs.push_back(ABIName.data());
872
873 // -mno-shared should be emitted unless -fpic, -fpie, -fPIC, -fPIE,
874 // or -mshared (not implemented) is in effect.
875 if (RelocationModel == llvm::Reloc::Static)
876 CmdArgs.push_back("-mno-shared");
877
878 // LLVM doesn't support -mplt yet and acts as if it is always given.
879 // However, -mplt has no effect with the N64 ABI.
880 if (ABIName != "64" && !Args.hasArg(options::OPT_mno_abicalls))
881 CmdArgs.push_back("-call_nonpic");
882
883 if (getToolChain().getTriple().isLittleEndian())
884 CmdArgs.push_back("-EL");
885 else
886 CmdArgs.push_back("-EB");
887
888 if (Arg *A = Args.getLastArg(options::OPT_mnan_EQ)) {
889 if (StringRef(A->getValue()) == "2008")
890 CmdArgs.push_back(Args.MakeArgString("-mnan=2008"));
891 }
892
893 // Add the last -mfp32/-mfpxx/-mfp64 or -mfpxx if it is enabled by default.
894 if (Arg *A = Args.getLastArg(options::OPT_mfp32, options::OPT_mfpxx,
895 options::OPT_mfp64)) {
896 A->claim();
897 A->render(Args, CmdArgs);
898 } else if (mips::shouldUseFPXX(
899 Args, getToolChain().getTriple(), CPUName, ABIName,
900 mips::getMipsFloatABI(getToolChain().getDriver(), Args,
901 getToolChain().getTriple())))
902 CmdArgs.push_back("-mfpxx");
903
904 // Pass on -mmips16 or -mno-mips16. However, the assembler equivalent of
905 // -mno-mips16 is actually -no-mips16.
906 if (Arg *A =
907 Args.getLastArg(options::OPT_mips16, options::OPT_mno_mips16)) {
908 if (A->getOption().matches(options::OPT_mips16)) {
909 A->claim();
910 A->render(Args, CmdArgs);
911 } else {
912 A->claim();
913 CmdArgs.push_back("-no-mips16");
914 }
915 }
916
917 Args.AddLastArg(CmdArgs, options::OPT_mmicromips,
918 options::OPT_mno_micromips);
919 Args.AddLastArg(CmdArgs, options::OPT_mdsp, options::OPT_mno_dsp);
920 Args.AddLastArg(CmdArgs, options::OPT_mdspr2, options::OPT_mno_dspr2);
921
922 if (Arg *A = Args.getLastArg(options::OPT_mmsa, options::OPT_mno_msa)) {
923 // Do not use AddLastArg because not all versions of MIPS assembler
924 // support -mmsa / -mno-msa options.
925 if (A->getOption().matches(options::OPT_mmsa))
926 CmdArgs.push_back(Args.MakeArgString("-mmsa"));
927 }
928
929 Args.AddLastArg(CmdArgs, options::OPT_mhard_float,
930 options::OPT_msoft_float);
931
932 Args.AddLastArg(CmdArgs, options::OPT_mdouble_float,
933 options::OPT_msingle_float);
934
935 Args.AddLastArg(CmdArgs, options::OPT_modd_spreg,
936 options::OPT_mno_odd_spreg);
937
938 AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
939 break;
940 }
941 case llvm::Triple::systemz: {
942 // Always pass an -march option, since our default of z10 is later
943 // than the GNU assembler's default.
944 std::string CPUName = systemz::getSystemZTargetCPU(Args);
945 CmdArgs.push_back(Args.MakeArgString("-march=" + CPUName));
946 break;
947 }
948 case llvm::Triple::ve:
949 DefaultAssembler = "nas";
950 }
951
952 for (const Arg *A : Args.filtered(options::OPT_ffile_prefix_map_EQ,
953 options::OPT_fdebug_prefix_map_EQ)) {
954 StringRef Map = A->getValue();
955 if (!Map.contains('='))
956 D.Diag(diag::err_drv_invalid_argument_to_option)
957 << Map << A->getOption().getName();
958 else {
959 CmdArgs.push_back(Args.MakeArgString("--debug-prefix-map"));
960 CmdArgs.push_back(Args.MakeArgString(Map));
961 }
962 A->claim();
963 }
964
965 Args.AddAllArgs(CmdArgs, options::OPT_I);
966 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
967
968 CmdArgs.push_back("-o");
969 CmdArgs.push_back(Output.getFilename());
970
971 for (const auto &II : Inputs)
972 CmdArgs.push_back(II.getFilename());
973
974 if (Arg *A = Args.getLastArg(options::OPT_g_Flag, options::OPT_gN_Group,
975 options::OPT_gdwarf_2, options::OPT_gdwarf_3,
976 options::OPT_gdwarf_4, options::OPT_gdwarf_5,
977 options::OPT_gdwarf))
978 if (!A->getOption().matches(options::OPT_g0)) {
979 Args.AddLastArg(CmdArgs, options::OPT_g_Flag);
980
981 unsigned DwarfVersion = getDwarfVersion(getToolChain(), Args);
982 CmdArgs.push_back(Args.MakeArgString("-gdwarf-" + Twine(DwarfVersion)));
983 }
984
985 const char *Exec =
986 Args.MakeArgString(getToolChain().GetProgramPath(DefaultAssembler));
987 C.addCommand(std::make_unique<Command>(JA, *this,
988 ResponseFileSupport::AtFileCurCP(),
989 Exec, CmdArgs, Inputs, Output));
990
991 // Handle the debug info splitting at object creation time if we're
992 // creating an object.
993 // TODO: Currently only works on linux with newer objcopy.
994 if (Args.hasArg(options::OPT_gsplit_dwarf) &&
995 getToolChain().getTriple().isOSLinux())
996 SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output,
997 SplitDebugName(JA, Args, Inputs[0], Output));
998 }
999
1000 namespace {
1001 // Filter to remove Multilibs that don't exist as a suffix to Path
1002 class FilterNonExistent {
1003 StringRef Base, File;
1004 llvm::vfs::FileSystem &VFS;
1005
1006 public:
FilterNonExistent(StringRef Base,StringRef File,llvm::vfs::FileSystem & VFS)1007 FilterNonExistent(StringRef Base, StringRef File, llvm::vfs::FileSystem &VFS)
1008 : Base(Base), File(File), VFS(VFS) {}
operator ()(const Multilib & M)1009 bool operator()(const Multilib &M) {
1010 return !VFS.exists(Base + M.gccSuffix() + File);
1011 }
1012 };
1013 } // end anonymous namespace
1014
isSoftFloatABI(const ArgList & Args)1015 static bool isSoftFloatABI(const ArgList &Args) {
1016 Arg *A = Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float,
1017 options::OPT_mfloat_abi_EQ);
1018 if (!A)
1019 return false;
1020
1021 return A->getOption().matches(options::OPT_msoft_float) ||
1022 (A->getOption().matches(options::OPT_mfloat_abi_EQ) &&
1023 A->getValue() == StringRef("soft"));
1024 }
1025
isArmOrThumbArch(llvm::Triple::ArchType Arch)1026 static bool isArmOrThumbArch(llvm::Triple::ArchType Arch) {
1027 return Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb;
1028 }
1029
isMipsEL(llvm::Triple::ArchType Arch)1030 static bool isMipsEL(llvm::Triple::ArchType Arch) {
1031 return Arch == llvm::Triple::mipsel || Arch == llvm::Triple::mips64el;
1032 }
1033
isMips16(const ArgList & Args)1034 static bool isMips16(const ArgList &Args) {
1035 Arg *A = Args.getLastArg(options::OPT_mips16, options::OPT_mno_mips16);
1036 return A && A->getOption().matches(options::OPT_mips16);
1037 }
1038
isMicroMips(const ArgList & Args)1039 static bool isMicroMips(const ArgList &Args) {
1040 Arg *A = Args.getLastArg(options::OPT_mmicromips, options::OPT_mno_micromips);
1041 return A && A->getOption().matches(options::OPT_mmicromips);
1042 }
1043
isMSP430(llvm::Triple::ArchType Arch)1044 static bool isMSP430(llvm::Triple::ArchType Arch) {
1045 return Arch == llvm::Triple::msp430;
1046 }
1047
makeMultilib(StringRef commonSuffix)1048 static Multilib makeMultilib(StringRef commonSuffix) {
1049 return Multilib(commonSuffix, commonSuffix, commonSuffix);
1050 }
1051
findMipsCsMultilibs(const Multilib::flags_list & Flags,FilterNonExistent & NonExistent,DetectedMultilibs & Result)1052 static bool findMipsCsMultilibs(const Multilib::flags_list &Flags,
1053 FilterNonExistent &NonExistent,
1054 DetectedMultilibs &Result) {
1055 // Check for Code Sourcery toolchain multilibs
1056 MultilibSet CSMipsMultilibs;
1057 {
1058 auto MArchMips16 = makeMultilib("/mips16").flag("+m32").flag("+mips16");
1059
1060 auto MArchMicroMips =
1061 makeMultilib("/micromips").flag("+m32").flag("+mmicromips");
1062
1063 auto MArchDefault = makeMultilib("").flag("-mips16").flag("-mmicromips");
1064
1065 auto UCLibc = makeMultilib("/uclibc").flag("+muclibc");
1066
1067 auto SoftFloat = makeMultilib("/soft-float").flag("+msoft-float");
1068
1069 auto Nan2008 = makeMultilib("/nan2008").flag("+mnan=2008");
1070
1071 auto DefaultFloat =
1072 makeMultilib("").flag("-msoft-float").flag("-mnan=2008");
1073
1074 auto BigEndian = makeMultilib("").flag("+EB").flag("-EL");
1075
1076 auto LittleEndian = makeMultilib("/el").flag("+EL").flag("-EB");
1077
1078 // Note that this one's osSuffix is ""
1079 auto MAbi64 = makeMultilib("")
1080 .gccSuffix("/64")
1081 .includeSuffix("/64")
1082 .flag("+mabi=n64")
1083 .flag("-mabi=n32")
1084 .flag("-m32");
1085
1086 CSMipsMultilibs =
1087 MultilibSet()
1088 .Either(MArchMips16, MArchMicroMips, MArchDefault)
1089 .Maybe(UCLibc)
1090 .Either(SoftFloat, Nan2008, DefaultFloat)
1091 .FilterOut("/micromips/nan2008")
1092 .FilterOut("/mips16/nan2008")
1093 .Either(BigEndian, LittleEndian)
1094 .Maybe(MAbi64)
1095 .FilterOut("/mips16.*/64")
1096 .FilterOut("/micromips.*/64")
1097 .FilterOut(NonExistent)
1098 .setIncludeDirsCallback([](const Multilib &M) {
1099 std::vector<std::string> Dirs({"/include"});
1100 if (StringRef(M.includeSuffix()).startswith("/uclibc"))
1101 Dirs.push_back(
1102 "/../../../../mips-linux-gnu/libc/uclibc/usr/include");
1103 else
1104 Dirs.push_back("/../../../../mips-linux-gnu/libc/usr/include");
1105 return Dirs;
1106 });
1107 }
1108
1109 MultilibSet DebianMipsMultilibs;
1110 {
1111 Multilib MAbiN32 =
1112 Multilib().gccSuffix("/n32").includeSuffix("/n32").flag("+mabi=n32");
1113
1114 Multilib M64 = Multilib()
1115 .gccSuffix("/64")
1116 .includeSuffix("/64")
1117 .flag("+m64")
1118 .flag("-m32")
1119 .flag("-mabi=n32");
1120
1121 Multilib M32 =
1122 Multilib().gccSuffix("/32").flag("-m64").flag("+m32").flag("-mabi=n32");
1123
1124 DebianMipsMultilibs =
1125 MultilibSet().Either(M32, M64, MAbiN32).FilterOut(NonExistent);
1126 }
1127
1128 // Sort candidates. Toolchain that best meets the directories tree goes first.
1129 // Then select the first toolchains matches command line flags.
1130 MultilibSet *Candidates[] = {&CSMipsMultilibs, &DebianMipsMultilibs};
1131 if (CSMipsMultilibs.size() < DebianMipsMultilibs.size())
1132 std::iter_swap(Candidates, Candidates + 1);
1133 for (const MultilibSet *Candidate : Candidates) {
1134 if (Candidate->select(Flags, Result.SelectedMultilib)) {
1135 if (Candidate == &DebianMipsMultilibs)
1136 Result.BiarchSibling = Multilib();
1137 Result.Multilibs = *Candidate;
1138 return true;
1139 }
1140 }
1141 return false;
1142 }
1143
findMipsAndroidMultilibs(llvm::vfs::FileSystem & VFS,StringRef Path,const Multilib::flags_list & Flags,FilterNonExistent & NonExistent,DetectedMultilibs & Result)1144 static bool findMipsAndroidMultilibs(llvm::vfs::FileSystem &VFS, StringRef Path,
1145 const Multilib::flags_list &Flags,
1146 FilterNonExistent &NonExistent,
1147 DetectedMultilibs &Result) {
1148
1149 MultilibSet AndroidMipsMultilibs =
1150 MultilibSet()
1151 .Maybe(Multilib("/mips-r2").flag("+march=mips32r2"))
1152 .Maybe(Multilib("/mips-r6").flag("+march=mips32r6"))
1153 .FilterOut(NonExistent);
1154
1155 MultilibSet AndroidMipselMultilibs =
1156 MultilibSet()
1157 .Either(Multilib().flag("+march=mips32"),
1158 Multilib("/mips-r2", "", "/mips-r2").flag("+march=mips32r2"),
1159 Multilib("/mips-r6", "", "/mips-r6").flag("+march=mips32r6"))
1160 .FilterOut(NonExistent);
1161
1162 MultilibSet AndroidMips64elMultilibs =
1163 MultilibSet()
1164 .Either(
1165 Multilib().flag("+march=mips64r6"),
1166 Multilib("/32/mips-r1", "", "/mips-r1").flag("+march=mips32"),
1167 Multilib("/32/mips-r2", "", "/mips-r2").flag("+march=mips32r2"),
1168 Multilib("/32/mips-r6", "", "/mips-r6").flag("+march=mips32r6"))
1169 .FilterOut(NonExistent);
1170
1171 MultilibSet *MS = &AndroidMipsMultilibs;
1172 if (VFS.exists(Path + "/mips-r6"))
1173 MS = &AndroidMipselMultilibs;
1174 else if (VFS.exists(Path + "/32"))
1175 MS = &AndroidMips64elMultilibs;
1176 if (MS->select(Flags, Result.SelectedMultilib)) {
1177 Result.Multilibs = *MS;
1178 return true;
1179 }
1180 return false;
1181 }
1182
findMipsMuslMultilibs(const Multilib::flags_list & Flags,FilterNonExistent & NonExistent,DetectedMultilibs & Result)1183 static bool findMipsMuslMultilibs(const Multilib::flags_list &Flags,
1184 FilterNonExistent &NonExistent,
1185 DetectedMultilibs &Result) {
1186 // Musl toolchain multilibs
1187 MultilibSet MuslMipsMultilibs;
1188 {
1189 auto MArchMipsR2 = makeMultilib("")
1190 .osSuffix("/mips-r2-hard-musl")
1191 .flag("+EB")
1192 .flag("-EL")
1193 .flag("+march=mips32r2");
1194
1195 auto MArchMipselR2 = makeMultilib("/mipsel-r2-hard-musl")
1196 .flag("-EB")
1197 .flag("+EL")
1198 .flag("+march=mips32r2");
1199
1200 MuslMipsMultilibs = MultilibSet().Either(MArchMipsR2, MArchMipselR2);
1201
1202 // Specify the callback that computes the include directories.
1203 MuslMipsMultilibs.setIncludeDirsCallback([](const Multilib &M) {
1204 return std::vector<std::string>(
1205 {"/../sysroot" + M.osSuffix() + "/usr/include"});
1206 });
1207 }
1208 if (MuslMipsMultilibs.select(Flags, Result.SelectedMultilib)) {
1209 Result.Multilibs = MuslMipsMultilibs;
1210 return true;
1211 }
1212 return false;
1213 }
1214
findMipsMtiMultilibs(const Multilib::flags_list & Flags,FilterNonExistent & NonExistent,DetectedMultilibs & Result)1215 static bool findMipsMtiMultilibs(const Multilib::flags_list &Flags,
1216 FilterNonExistent &NonExistent,
1217 DetectedMultilibs &Result) {
1218 // CodeScape MTI toolchain v1.2 and early.
1219 MultilibSet MtiMipsMultilibsV1;
1220 {
1221 auto MArchMips32 = makeMultilib("/mips32")
1222 .flag("+m32")
1223 .flag("-m64")
1224 .flag("-mmicromips")
1225 .flag("+march=mips32");
1226
1227 auto MArchMicroMips = makeMultilib("/micromips")
1228 .flag("+m32")
1229 .flag("-m64")
1230 .flag("+mmicromips");
1231
1232 auto MArchMips64r2 = makeMultilib("/mips64r2")
1233 .flag("-m32")
1234 .flag("+m64")
1235 .flag("+march=mips64r2");
1236
1237 auto MArchMips64 = makeMultilib("/mips64").flag("-m32").flag("+m64").flag(
1238 "-march=mips64r2");
1239
1240 auto MArchDefault = makeMultilib("")
1241 .flag("+m32")
1242 .flag("-m64")
1243 .flag("-mmicromips")
1244 .flag("+march=mips32r2");
1245
1246 auto Mips16 = makeMultilib("/mips16").flag("+mips16");
1247
1248 auto UCLibc = makeMultilib("/uclibc").flag("+muclibc");
1249
1250 auto MAbi64 =
1251 makeMultilib("/64").flag("+mabi=n64").flag("-mabi=n32").flag("-m32");
1252
1253 auto BigEndian = makeMultilib("").flag("+EB").flag("-EL");
1254
1255 auto LittleEndian = makeMultilib("/el").flag("+EL").flag("-EB");
1256
1257 auto SoftFloat = makeMultilib("/sof").flag("+msoft-float");
1258
1259 auto Nan2008 = makeMultilib("/nan2008").flag("+mnan=2008");
1260
1261 MtiMipsMultilibsV1 =
1262 MultilibSet()
1263 .Either(MArchMips32, MArchMicroMips, MArchMips64r2, MArchMips64,
1264 MArchDefault)
1265 .Maybe(UCLibc)
1266 .Maybe(Mips16)
1267 .FilterOut("/mips64/mips16")
1268 .FilterOut("/mips64r2/mips16")
1269 .FilterOut("/micromips/mips16")
1270 .Maybe(MAbi64)
1271 .FilterOut("/micromips/64")
1272 .FilterOut("/mips32/64")
1273 .FilterOut("^/64")
1274 .FilterOut("/mips16/64")
1275 .Either(BigEndian, LittleEndian)
1276 .Maybe(SoftFloat)
1277 .Maybe(Nan2008)
1278 .FilterOut(".*sof/nan2008")
1279 .FilterOut(NonExistent)
1280 .setIncludeDirsCallback([](const Multilib &M) {
1281 std::vector<std::string> Dirs({"/include"});
1282 if (StringRef(M.includeSuffix()).startswith("/uclibc"))
1283 Dirs.push_back("/../../../../sysroot/uclibc/usr/include");
1284 else
1285 Dirs.push_back("/../../../../sysroot/usr/include");
1286 return Dirs;
1287 });
1288 }
1289
1290 // CodeScape IMG toolchain starting from v1.3.
1291 MultilibSet MtiMipsMultilibsV2;
1292 {
1293 auto BeHard = makeMultilib("/mips-r2-hard")
1294 .flag("+EB")
1295 .flag("-msoft-float")
1296 .flag("-mnan=2008")
1297 .flag("-muclibc");
1298 auto BeSoft = makeMultilib("/mips-r2-soft")
1299 .flag("+EB")
1300 .flag("+msoft-float")
1301 .flag("-mnan=2008");
1302 auto ElHard = makeMultilib("/mipsel-r2-hard")
1303 .flag("+EL")
1304 .flag("-msoft-float")
1305 .flag("-mnan=2008")
1306 .flag("-muclibc");
1307 auto ElSoft = makeMultilib("/mipsel-r2-soft")
1308 .flag("+EL")
1309 .flag("+msoft-float")
1310 .flag("-mnan=2008")
1311 .flag("-mmicromips");
1312 auto BeHardNan = makeMultilib("/mips-r2-hard-nan2008")
1313 .flag("+EB")
1314 .flag("-msoft-float")
1315 .flag("+mnan=2008")
1316 .flag("-muclibc");
1317 auto ElHardNan = makeMultilib("/mipsel-r2-hard-nan2008")
1318 .flag("+EL")
1319 .flag("-msoft-float")
1320 .flag("+mnan=2008")
1321 .flag("-muclibc")
1322 .flag("-mmicromips");
1323 auto BeHardNanUclibc = makeMultilib("/mips-r2-hard-nan2008-uclibc")
1324 .flag("+EB")
1325 .flag("-msoft-float")
1326 .flag("+mnan=2008")
1327 .flag("+muclibc");
1328 auto ElHardNanUclibc = makeMultilib("/mipsel-r2-hard-nan2008-uclibc")
1329 .flag("+EL")
1330 .flag("-msoft-float")
1331 .flag("+mnan=2008")
1332 .flag("+muclibc");
1333 auto BeHardUclibc = makeMultilib("/mips-r2-hard-uclibc")
1334 .flag("+EB")
1335 .flag("-msoft-float")
1336 .flag("-mnan=2008")
1337 .flag("+muclibc");
1338 auto ElHardUclibc = makeMultilib("/mipsel-r2-hard-uclibc")
1339 .flag("+EL")
1340 .flag("-msoft-float")
1341 .flag("-mnan=2008")
1342 .flag("+muclibc");
1343 auto ElMicroHardNan = makeMultilib("/micromipsel-r2-hard-nan2008")
1344 .flag("+EL")
1345 .flag("-msoft-float")
1346 .flag("+mnan=2008")
1347 .flag("+mmicromips");
1348 auto ElMicroSoft = makeMultilib("/micromipsel-r2-soft")
1349 .flag("+EL")
1350 .flag("+msoft-float")
1351 .flag("-mnan=2008")
1352 .flag("+mmicromips");
1353
1354 auto O32 =
1355 makeMultilib("/lib").osSuffix("").flag("-mabi=n32").flag("-mabi=n64");
1356 auto N32 =
1357 makeMultilib("/lib32").osSuffix("").flag("+mabi=n32").flag("-mabi=n64");
1358 auto N64 =
1359 makeMultilib("/lib64").osSuffix("").flag("-mabi=n32").flag("+mabi=n64");
1360
1361 MtiMipsMultilibsV2 =
1362 MultilibSet()
1363 .Either({BeHard, BeSoft, ElHard, ElSoft, BeHardNan, ElHardNan,
1364 BeHardNanUclibc, ElHardNanUclibc, BeHardUclibc,
1365 ElHardUclibc, ElMicroHardNan, ElMicroSoft})
1366 .Either(O32, N32, N64)
1367 .FilterOut(NonExistent)
1368 .setIncludeDirsCallback([](const Multilib &M) {
1369 return std::vector<std::string>({"/../../../../sysroot" +
1370 M.includeSuffix() +
1371 "/../usr/include"});
1372 })
1373 .setFilePathsCallback([](const Multilib &M) {
1374 return std::vector<std::string>(
1375 {"/../../../../mips-mti-linux-gnu/lib" + M.gccSuffix()});
1376 });
1377 }
1378 for (auto *Candidate : {&MtiMipsMultilibsV1, &MtiMipsMultilibsV2}) {
1379 if (Candidate->select(Flags, Result.SelectedMultilib)) {
1380 Result.Multilibs = *Candidate;
1381 return true;
1382 }
1383 }
1384 return false;
1385 }
1386
findMipsImgMultilibs(const Multilib::flags_list & Flags,FilterNonExistent & NonExistent,DetectedMultilibs & Result)1387 static bool findMipsImgMultilibs(const Multilib::flags_list &Flags,
1388 FilterNonExistent &NonExistent,
1389 DetectedMultilibs &Result) {
1390 // CodeScape IMG toolchain v1.2 and early.
1391 MultilibSet ImgMultilibsV1;
1392 {
1393 auto Mips64r6 = makeMultilib("/mips64r6").flag("+m64").flag("-m32");
1394
1395 auto LittleEndian = makeMultilib("/el").flag("+EL").flag("-EB");
1396
1397 auto MAbi64 =
1398 makeMultilib("/64").flag("+mabi=n64").flag("-mabi=n32").flag("-m32");
1399
1400 ImgMultilibsV1 =
1401 MultilibSet()
1402 .Maybe(Mips64r6)
1403 .Maybe(MAbi64)
1404 .Maybe(LittleEndian)
1405 .FilterOut(NonExistent)
1406 .setIncludeDirsCallback([](const Multilib &M) {
1407 return std::vector<std::string>(
1408 {"/include", "/../../../../sysroot/usr/include"});
1409 });
1410 }
1411
1412 // CodeScape IMG toolchain starting from v1.3.
1413 MultilibSet ImgMultilibsV2;
1414 {
1415 auto BeHard = makeMultilib("/mips-r6-hard")
1416 .flag("+EB")
1417 .flag("-msoft-float")
1418 .flag("-mmicromips");
1419 auto BeSoft = makeMultilib("/mips-r6-soft")
1420 .flag("+EB")
1421 .flag("+msoft-float")
1422 .flag("-mmicromips");
1423 auto ElHard = makeMultilib("/mipsel-r6-hard")
1424 .flag("+EL")
1425 .flag("-msoft-float")
1426 .flag("-mmicromips");
1427 auto ElSoft = makeMultilib("/mipsel-r6-soft")
1428 .flag("+EL")
1429 .flag("+msoft-float")
1430 .flag("-mmicromips");
1431 auto BeMicroHard = makeMultilib("/micromips-r6-hard")
1432 .flag("+EB")
1433 .flag("-msoft-float")
1434 .flag("+mmicromips");
1435 auto BeMicroSoft = makeMultilib("/micromips-r6-soft")
1436 .flag("+EB")
1437 .flag("+msoft-float")
1438 .flag("+mmicromips");
1439 auto ElMicroHard = makeMultilib("/micromipsel-r6-hard")
1440 .flag("+EL")
1441 .flag("-msoft-float")
1442 .flag("+mmicromips");
1443 auto ElMicroSoft = makeMultilib("/micromipsel-r6-soft")
1444 .flag("+EL")
1445 .flag("+msoft-float")
1446 .flag("+mmicromips");
1447
1448 auto O32 =
1449 makeMultilib("/lib").osSuffix("").flag("-mabi=n32").flag("-mabi=n64");
1450 auto N32 =
1451 makeMultilib("/lib32").osSuffix("").flag("+mabi=n32").flag("-mabi=n64");
1452 auto N64 =
1453 makeMultilib("/lib64").osSuffix("").flag("-mabi=n32").flag("+mabi=n64");
1454
1455 ImgMultilibsV2 =
1456 MultilibSet()
1457 .Either({BeHard, BeSoft, ElHard, ElSoft, BeMicroHard, BeMicroSoft,
1458 ElMicroHard, ElMicroSoft})
1459 .Either(O32, N32, N64)
1460 .FilterOut(NonExistent)
1461 .setIncludeDirsCallback([](const Multilib &M) {
1462 return std::vector<std::string>({"/../../../../sysroot" +
1463 M.includeSuffix() +
1464 "/../usr/include"});
1465 })
1466 .setFilePathsCallback([](const Multilib &M) {
1467 return std::vector<std::string>(
1468 {"/../../../../mips-img-linux-gnu/lib" + M.gccSuffix()});
1469 });
1470 }
1471 for (auto *Candidate : {&ImgMultilibsV1, &ImgMultilibsV2}) {
1472 if (Candidate->select(Flags, Result.SelectedMultilib)) {
1473 Result.Multilibs = *Candidate;
1474 return true;
1475 }
1476 }
1477 return false;
1478 }
1479
findMIPSMultilibs(const Driver & D,const llvm::Triple & TargetTriple,StringRef Path,const ArgList & Args,DetectedMultilibs & Result)1480 bool clang::driver::findMIPSMultilibs(const Driver &D,
1481 const llvm::Triple &TargetTriple,
1482 StringRef Path, const ArgList &Args,
1483 DetectedMultilibs &Result) {
1484 FilterNonExistent NonExistent(Path, "/crtbegin.o", D.getVFS());
1485
1486 StringRef CPUName;
1487 StringRef ABIName;
1488 tools::mips::getMipsCPUAndABI(Args, TargetTriple, CPUName, ABIName);
1489
1490 llvm::Triple::ArchType TargetArch = TargetTriple.getArch();
1491
1492 Multilib::flags_list Flags;
1493 addMultilibFlag(TargetTriple.isMIPS32(), "m32", Flags);
1494 addMultilibFlag(TargetTriple.isMIPS64(), "m64", Flags);
1495 addMultilibFlag(isMips16(Args), "mips16", Flags);
1496 addMultilibFlag(CPUName == "mips32", "march=mips32", Flags);
1497 addMultilibFlag(CPUName == "mips32r2" || CPUName == "mips32r3" ||
1498 CPUName == "mips32r5" || CPUName == "p5600",
1499 "march=mips32r2", Flags);
1500 addMultilibFlag(CPUName == "mips32r6", "march=mips32r6", Flags);
1501 addMultilibFlag(CPUName == "mips64", "march=mips64", Flags);
1502 addMultilibFlag(CPUName == "mips64r2" || CPUName == "mips64r3" ||
1503 CPUName == "mips64r5" || CPUName == "octeon" ||
1504 CPUName == "octeon+",
1505 "march=mips64r2", Flags);
1506 addMultilibFlag(CPUName == "mips64r6", "march=mips64r6", Flags);
1507 addMultilibFlag(isMicroMips(Args), "mmicromips", Flags);
1508 addMultilibFlag(tools::mips::isUCLibc(Args), "muclibc", Flags);
1509 addMultilibFlag(tools::mips::isNaN2008(D, Args, TargetTriple), "mnan=2008",
1510 Flags);
1511 addMultilibFlag(ABIName == "n32", "mabi=n32", Flags);
1512 addMultilibFlag(ABIName == "n64", "mabi=n64", Flags);
1513 addMultilibFlag(isSoftFloatABI(Args), "msoft-float", Flags);
1514 addMultilibFlag(!isSoftFloatABI(Args), "mhard-float", Flags);
1515 addMultilibFlag(isMipsEL(TargetArch), "EL", Flags);
1516 addMultilibFlag(!isMipsEL(TargetArch), "EB", Flags);
1517
1518 if (TargetTriple.isAndroid())
1519 return findMipsAndroidMultilibs(D.getVFS(), Path, Flags, NonExistent,
1520 Result);
1521
1522 if (TargetTriple.getVendor() == llvm::Triple::MipsTechnologies &&
1523 TargetTriple.getOS() == llvm::Triple::Linux &&
1524 TargetTriple.getEnvironment() == llvm::Triple::UnknownEnvironment)
1525 return findMipsMuslMultilibs(Flags, NonExistent, Result);
1526
1527 if (TargetTriple.getVendor() == llvm::Triple::MipsTechnologies &&
1528 TargetTriple.getOS() == llvm::Triple::Linux &&
1529 TargetTriple.isGNUEnvironment())
1530 return findMipsMtiMultilibs(Flags, NonExistent, Result);
1531
1532 if (TargetTriple.getVendor() == llvm::Triple::ImaginationTechnologies &&
1533 TargetTriple.getOS() == llvm::Triple::Linux &&
1534 TargetTriple.isGNUEnvironment())
1535 return findMipsImgMultilibs(Flags, NonExistent, Result);
1536
1537 if (findMipsCsMultilibs(Flags, NonExistent, Result))
1538 return true;
1539
1540 // Fallback to the regular toolchain-tree structure.
1541 Multilib Default;
1542 Result.Multilibs.push_back(Default);
1543 Result.Multilibs.FilterOut(NonExistent);
1544
1545 if (Result.Multilibs.select(Flags, Result.SelectedMultilib)) {
1546 Result.BiarchSibling = Multilib();
1547 return true;
1548 }
1549
1550 return false;
1551 }
1552
findAndroidArmMultilibs(const Driver & D,const llvm::Triple & TargetTriple,StringRef Path,const ArgList & Args,DetectedMultilibs & Result)1553 static void findAndroidArmMultilibs(const Driver &D,
1554 const llvm::Triple &TargetTriple,
1555 StringRef Path, const ArgList &Args,
1556 DetectedMultilibs &Result) {
1557 // Find multilibs with subdirectories like armv7-a, thumb, armv7-a/thumb.
1558 FilterNonExistent NonExistent(Path, "/crtbegin.o", D.getVFS());
1559 Multilib ArmV7Multilib = makeMultilib("/armv7-a")
1560 .flag("+march=armv7-a")
1561 .flag("-mthumb");
1562 Multilib ThumbMultilib = makeMultilib("/thumb")
1563 .flag("-march=armv7-a")
1564 .flag("+mthumb");
1565 Multilib ArmV7ThumbMultilib = makeMultilib("/armv7-a/thumb")
1566 .flag("+march=armv7-a")
1567 .flag("+mthumb");
1568 Multilib DefaultMultilib = makeMultilib("")
1569 .flag("-march=armv7-a")
1570 .flag("-mthumb");
1571 MultilibSet AndroidArmMultilibs =
1572 MultilibSet()
1573 .Either(ThumbMultilib, ArmV7Multilib,
1574 ArmV7ThumbMultilib, DefaultMultilib)
1575 .FilterOut(NonExistent);
1576
1577 Multilib::flags_list Flags;
1578 llvm::StringRef Arch = Args.getLastArgValue(options::OPT_march_EQ);
1579 bool IsArmArch = TargetTriple.getArch() == llvm::Triple::arm;
1580 bool IsThumbArch = TargetTriple.getArch() == llvm::Triple::thumb;
1581 bool IsV7SubArch = TargetTriple.getSubArch() == llvm::Triple::ARMSubArch_v7;
1582 bool IsThumbMode = IsThumbArch ||
1583 Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, false) ||
1584 (IsArmArch && llvm::ARM::parseArchISA(Arch) == llvm::ARM::ISAKind::THUMB);
1585 bool IsArmV7Mode = (IsArmArch || IsThumbArch) &&
1586 (llvm::ARM::parseArchVersion(Arch) == 7 ||
1587 (IsArmArch && Arch == "" && IsV7SubArch));
1588 addMultilibFlag(IsArmV7Mode, "march=armv7-a", Flags);
1589 addMultilibFlag(IsThumbMode, "mthumb", Flags);
1590
1591 if (AndroidArmMultilibs.select(Flags, Result.SelectedMultilib))
1592 Result.Multilibs = AndroidArmMultilibs;
1593 }
1594
findMSP430Multilibs(const Driver & D,const llvm::Triple & TargetTriple,StringRef Path,const ArgList & Args,DetectedMultilibs & Result)1595 static bool findMSP430Multilibs(const Driver &D,
1596 const llvm::Triple &TargetTriple,
1597 StringRef Path, const ArgList &Args,
1598 DetectedMultilibs &Result) {
1599 FilterNonExistent NonExistent(Path, "/crtbegin.o", D.getVFS());
1600 Multilib WithoutExceptions = makeMultilib("/430").flag("-exceptions");
1601 Multilib WithExceptions = makeMultilib("/430/exceptions").flag("+exceptions");
1602
1603 // FIXME: when clang starts to support msp430x ISA additional logic
1604 // to select between multilib must be implemented
1605 // Multilib MSP430xMultilib = makeMultilib("/large");
1606
1607 Result.Multilibs.push_back(WithoutExceptions);
1608 Result.Multilibs.push_back(WithExceptions);
1609 Result.Multilibs.FilterOut(NonExistent);
1610
1611 Multilib::flags_list Flags;
1612 addMultilibFlag(Args.hasFlag(options::OPT_fexceptions,
1613 options::OPT_fno_exceptions, false),
1614 "exceptions", Flags);
1615 if (Result.Multilibs.select(Flags, Result.SelectedMultilib))
1616 return true;
1617
1618 return false;
1619 }
1620
findCSKYMultilibs(const Driver & D,const llvm::Triple & TargetTriple,StringRef Path,const ArgList & Args,DetectedMultilibs & Result)1621 static void findCSKYMultilibs(const Driver &D, const llvm::Triple &TargetTriple,
1622 StringRef Path, const ArgList &Args,
1623 DetectedMultilibs &Result) {
1624 FilterNonExistent NonExistent(Path, "/crtbegin.o", D.getVFS());
1625
1626 tools::csky::FloatABI TheFloatABI = tools::csky::getCSKYFloatABI(D, Args);
1627 std::optional<llvm::StringRef> Res =
1628 tools::csky::getCSKYArchName(D, Args, TargetTriple);
1629
1630 if (!Res)
1631 return;
1632 auto ARCHName = *Res;
1633
1634 Multilib::flags_list Flags;
1635 addMultilibFlag(TheFloatABI == tools::csky::FloatABI::Hard, "hard-fp", Flags);
1636 addMultilibFlag(TheFloatABI == tools::csky::FloatABI::SoftFP, "soft-fp",
1637 Flags);
1638 addMultilibFlag(TheFloatABI == tools::csky::FloatABI::Soft, "soft", Flags);
1639 addMultilibFlag(ARCHName == "ck801", "march=ck801", Flags);
1640 addMultilibFlag(ARCHName == "ck802", "march=ck802", Flags);
1641 addMultilibFlag(ARCHName == "ck803", "march=ck803", Flags);
1642 addMultilibFlag(ARCHName == "ck804", "march=ck804", Flags);
1643 addMultilibFlag(ARCHName == "ck805", "march=ck805", Flags);
1644 addMultilibFlag(ARCHName == "ck807", "march=ck807", Flags);
1645 addMultilibFlag(ARCHName == "ck810", "march=ck810", Flags);
1646 addMultilibFlag(ARCHName == "ck810v", "march=ck810v", Flags);
1647 addMultilibFlag(ARCHName == "ck860", "march=ck860", Flags);
1648 addMultilibFlag(ARCHName == "ck860v", "march=ck860v", Flags);
1649
1650 bool isBigEndian = false;
1651 if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
1652 options::OPT_mbig_endian))
1653 isBigEndian = !A->getOption().matches(options::OPT_mlittle_endian);
1654 addMultilibFlag(isBigEndian, "EB", Flags);
1655
1656 auto HardFloat = makeMultilib("/hard-fp").flag("+hard-fp");
1657 auto SoftFpFloat = makeMultilib("/soft-fp").flag("+soft-fp");
1658 auto SoftFloat = makeMultilib("").flag("+soft");
1659 auto Arch801 = makeMultilib("/ck801").flag("+march=ck801");
1660 auto Arch802 = makeMultilib("/ck802").flag("+march=ck802");
1661 auto Arch803 = makeMultilib("/ck803").flag("+march=ck803");
1662 // CK804 use the same library as CK803
1663 auto Arch804 = makeMultilib("/ck803").flag("+march=ck804");
1664 auto Arch805 = makeMultilib("/ck805").flag("+march=ck805");
1665 auto Arch807 = makeMultilib("/ck807").flag("+march=ck807");
1666 auto Arch810 = makeMultilib("").flag("+march=ck810");
1667 auto Arch810v = makeMultilib("/ck810v").flag("+march=ck810v");
1668 auto Arch860 = makeMultilib("/ck860").flag("+march=ck860");
1669 auto Arch860v = makeMultilib("/ck860v").flag("+march=ck860v");
1670 auto BigEndian = makeMultilib("/big").flag("+EB");
1671
1672 MultilibSet CSKYMultilibs =
1673 MultilibSet()
1674 .Maybe(BigEndian)
1675 .Either({Arch801, Arch802, Arch803, Arch804, Arch805, Arch807,
1676 Arch810, Arch810v, Arch860, Arch860v})
1677 .Either(HardFloat, SoftFpFloat, SoftFloat)
1678 .FilterOut(NonExistent);
1679
1680 if (CSKYMultilibs.select(Flags, Result.SelectedMultilib))
1681 Result.Multilibs = CSKYMultilibs;
1682 }
1683
findRISCVBareMetalMultilibs(const Driver & D,const llvm::Triple & TargetTriple,StringRef Path,const ArgList & Args,DetectedMultilibs & Result)1684 static void findRISCVBareMetalMultilibs(const Driver &D,
1685 const llvm::Triple &TargetTriple,
1686 StringRef Path, const ArgList &Args,
1687 DetectedMultilibs &Result) {
1688 FilterNonExistent NonExistent(Path, "/crtbegin.o", D.getVFS());
1689 struct RiscvMultilib {
1690 StringRef march;
1691 StringRef mabi;
1692 };
1693 // currently only support the set of multilibs like riscv-gnu-toolchain does.
1694 // TODO: support MULTILIB_REUSE
1695 constexpr RiscvMultilib RISCVMultilibSet[] = {
1696 {"rv32i", "ilp32"}, {"rv32im", "ilp32"}, {"rv32iac", "ilp32"},
1697 {"rv32imac", "ilp32"}, {"rv32imafc", "ilp32f"}, {"rv64imac", "lp64"},
1698 {"rv64imafdc", "lp64d"}};
1699
1700 std::vector<Multilib> Ms;
1701 for (auto Element : RISCVMultilibSet) {
1702 // multilib path rule is ${march}/${mabi}
1703 Ms.emplace_back(
1704 makeMultilib((Twine(Element.march) + "/" + Twine(Element.mabi)).str())
1705 .flag(Twine("+march=", Element.march).str())
1706 .flag(Twine("+mabi=", Element.mabi).str()));
1707 }
1708 MultilibSet RISCVMultilibs =
1709 MultilibSet()
1710 .Either(ArrayRef<Multilib>(Ms))
1711 .FilterOut(NonExistent)
1712 .setFilePathsCallback([](const Multilib &M) {
1713 return std::vector<std::string>(
1714 {M.gccSuffix(),
1715 "/../../../../riscv64-unknown-elf/lib" + M.gccSuffix(),
1716 "/../../../../riscv32-unknown-elf/lib" + M.gccSuffix()});
1717 });
1718
1719
1720 Multilib::flags_list Flags;
1721 llvm::StringSet<> Added_ABIs;
1722 StringRef ABIName = tools::riscv::getRISCVABI(Args, TargetTriple);
1723 StringRef MArch = tools::riscv::getRISCVArch(Args, TargetTriple);
1724 for (auto Element : RISCVMultilibSet) {
1725 addMultilibFlag(MArch == Element.march,
1726 Twine("march=", Element.march).str().c_str(), Flags);
1727 if (!Added_ABIs.count(Element.mabi)) {
1728 Added_ABIs.insert(Element.mabi);
1729 addMultilibFlag(ABIName == Element.mabi,
1730 Twine("mabi=", Element.mabi).str().c_str(), Flags);
1731 }
1732 }
1733
1734 if (RISCVMultilibs.select(Flags, Result.SelectedMultilib))
1735 Result.Multilibs = RISCVMultilibs;
1736 }
1737
findRISCVMultilibs(const Driver & D,const llvm::Triple & TargetTriple,StringRef Path,const ArgList & Args,DetectedMultilibs & Result)1738 static void findRISCVMultilibs(const Driver &D,
1739 const llvm::Triple &TargetTriple, StringRef Path,
1740 const ArgList &Args, DetectedMultilibs &Result) {
1741 if (TargetTriple.getOS() == llvm::Triple::UnknownOS)
1742 return findRISCVBareMetalMultilibs(D, TargetTriple, Path, Args, Result);
1743
1744 FilterNonExistent NonExistent(Path, "/crtbegin.o", D.getVFS());
1745 Multilib Ilp32 = makeMultilib("lib32/ilp32").flag("+m32").flag("+mabi=ilp32");
1746 Multilib Ilp32f =
1747 makeMultilib("lib32/ilp32f").flag("+m32").flag("+mabi=ilp32f");
1748 Multilib Ilp32d =
1749 makeMultilib("lib32/ilp32d").flag("+m32").flag("+mabi=ilp32d");
1750 Multilib Lp64 = makeMultilib("lib64/lp64").flag("+m64").flag("+mabi=lp64");
1751 Multilib Lp64f = makeMultilib("lib64/lp64f").flag("+m64").flag("+mabi=lp64f");
1752 Multilib Lp64d = makeMultilib("lib64/lp64d").flag("+m64").flag("+mabi=lp64d");
1753 MultilibSet RISCVMultilibs =
1754 MultilibSet()
1755 .Either({Ilp32, Ilp32f, Ilp32d, Lp64, Lp64f, Lp64d})
1756 .FilterOut(NonExistent);
1757
1758 Multilib::flags_list Flags;
1759 bool IsRV64 = TargetTriple.getArch() == llvm::Triple::riscv64;
1760 StringRef ABIName = tools::riscv::getRISCVABI(Args, TargetTriple);
1761
1762 addMultilibFlag(!IsRV64, "m32", Flags);
1763 addMultilibFlag(IsRV64, "m64", Flags);
1764 addMultilibFlag(ABIName == "ilp32", "mabi=ilp32", Flags);
1765 addMultilibFlag(ABIName == "ilp32f", "mabi=ilp32f", Flags);
1766 addMultilibFlag(ABIName == "ilp32d", "mabi=ilp32d", Flags);
1767 addMultilibFlag(ABIName == "lp64", "mabi=lp64", Flags);
1768 addMultilibFlag(ABIName == "lp64f", "mabi=lp64f", Flags);
1769 addMultilibFlag(ABIName == "lp64d", "mabi=lp64d", Flags);
1770
1771 if (RISCVMultilibs.select(Flags, Result.SelectedMultilib))
1772 Result.Multilibs = RISCVMultilibs;
1773 }
1774
findBiarchMultilibs(const Driver & D,const llvm::Triple & TargetTriple,StringRef Path,const ArgList & Args,bool NeedsBiarchSuffix,DetectedMultilibs & Result)1775 static bool findBiarchMultilibs(const Driver &D,
1776 const llvm::Triple &TargetTriple,
1777 StringRef Path, const ArgList &Args,
1778 bool NeedsBiarchSuffix,
1779 DetectedMultilibs &Result) {
1780 Multilib Default;
1781
1782 // Some versions of SUSE and Fedora on ppc64 put 32-bit libs
1783 // in what would normally be GCCInstallPath and put the 64-bit
1784 // libs in a subdirectory named 64. The simple logic we follow is that
1785 // *if* there is a subdirectory of the right name with crtbegin.o in it,
1786 // we use that. If not, and if not a biarch triple alias, we look for
1787 // crtbegin.o without the subdirectory.
1788
1789 StringRef Suff64 = "/64";
1790 // Solaris uses platform-specific suffixes instead of /64.
1791 if (TargetTriple.getOS() == llvm::Triple::Solaris) {
1792 switch (TargetTriple.getArch()) {
1793 case llvm::Triple::x86:
1794 case llvm::Triple::x86_64:
1795 Suff64 = "/amd64";
1796 break;
1797 case llvm::Triple::sparc:
1798 case llvm::Triple::sparcv9:
1799 Suff64 = "/sparcv9";
1800 break;
1801 default:
1802 break;
1803 }
1804 }
1805
1806 Multilib Alt64 = Multilib()
1807 .gccSuffix(Suff64)
1808 .includeSuffix(Suff64)
1809 .flag("-m32")
1810 .flag("+m64")
1811 .flag("-mx32");
1812 Multilib Alt32 = Multilib()
1813 .gccSuffix("/32")
1814 .includeSuffix("/32")
1815 .flag("+m32")
1816 .flag("-m64")
1817 .flag("-mx32");
1818 Multilib Altx32 = Multilib()
1819 .gccSuffix("/x32")
1820 .includeSuffix("/x32")
1821 .flag("-m32")
1822 .flag("-m64")
1823 .flag("+mx32");
1824
1825 // GCC toolchain for IAMCU doesn't have crtbegin.o, so look for libgcc.a.
1826 FilterNonExistent NonExistent(
1827 Path, TargetTriple.isOSIAMCU() ? "/libgcc.a" : "/crtbegin.o", D.getVFS());
1828
1829 // Determine default multilib from: 32, 64, x32
1830 // Also handle cases such as 64 on 32, 32 on 64, etc.
1831 enum { UNKNOWN, WANT32, WANT64, WANTX32 } Want = UNKNOWN;
1832 const bool IsX32 = TargetTriple.isX32();
1833 if (TargetTriple.isArch32Bit() && !NonExistent(Alt32))
1834 Want = WANT64;
1835 else if (TargetTriple.isArch64Bit() && IsX32 && !NonExistent(Altx32))
1836 Want = WANT64;
1837 else if (TargetTriple.isArch64Bit() && !IsX32 && !NonExistent(Alt64))
1838 Want = WANT32;
1839 else {
1840 if (TargetTriple.isArch32Bit())
1841 Want = NeedsBiarchSuffix ? WANT64 : WANT32;
1842 else if (IsX32)
1843 Want = NeedsBiarchSuffix ? WANT64 : WANTX32;
1844 else
1845 Want = NeedsBiarchSuffix ? WANT32 : WANT64;
1846 }
1847
1848 if (Want == WANT32)
1849 Default.flag("+m32").flag("-m64").flag("-mx32");
1850 else if (Want == WANT64)
1851 Default.flag("-m32").flag("+m64").flag("-mx32");
1852 else if (Want == WANTX32)
1853 Default.flag("-m32").flag("-m64").flag("+mx32");
1854 else
1855 return false;
1856
1857 Result.Multilibs.push_back(Default);
1858 Result.Multilibs.push_back(Alt64);
1859 Result.Multilibs.push_back(Alt32);
1860 Result.Multilibs.push_back(Altx32);
1861
1862 Result.Multilibs.FilterOut(NonExistent);
1863
1864 Multilib::flags_list Flags;
1865 addMultilibFlag(TargetTriple.isArch64Bit() && !IsX32, "m64", Flags);
1866 addMultilibFlag(TargetTriple.isArch32Bit(), "m32", Flags);
1867 addMultilibFlag(TargetTriple.isArch64Bit() && IsX32, "mx32", Flags);
1868
1869 if (!Result.Multilibs.select(Flags, Result.SelectedMultilib))
1870 return false;
1871
1872 if (Result.SelectedMultilib == Alt64 || Result.SelectedMultilib == Alt32 ||
1873 Result.SelectedMultilib == Altx32)
1874 Result.BiarchSibling = Default;
1875
1876 return true;
1877 }
1878
1879 /// Generic_GCC - A tool chain using the 'gcc' command to perform
1880 /// all subcommands; this relies on gcc translating the majority of
1881 /// command line options.
1882
1883 /// Less-than for GCCVersion, implementing a Strict Weak Ordering.
isOlderThan(int RHSMajor,int RHSMinor,int RHSPatch,StringRef RHSPatchSuffix) const1884 bool Generic_GCC::GCCVersion::isOlderThan(int RHSMajor, int RHSMinor,
1885 int RHSPatch,
1886 StringRef RHSPatchSuffix) const {
1887 if (Major != RHSMajor)
1888 return Major < RHSMajor;
1889 if (Minor != RHSMinor) {
1890 // Note that versions without a specified minor sort higher than those with
1891 // a minor.
1892 if (RHSMinor == -1)
1893 return true;
1894 if (Minor == -1)
1895 return false;
1896 return Minor < RHSMinor;
1897 }
1898 if (Patch != RHSPatch) {
1899 // Note that versions without a specified patch sort higher than those with
1900 // a patch.
1901 if (RHSPatch == -1)
1902 return true;
1903 if (Patch == -1)
1904 return false;
1905
1906 // Otherwise just sort on the patch itself.
1907 return Patch < RHSPatch;
1908 }
1909 if (PatchSuffix != RHSPatchSuffix) {
1910 // Sort empty suffixes higher.
1911 if (RHSPatchSuffix.empty())
1912 return true;
1913 if (PatchSuffix.empty())
1914 return false;
1915
1916 // Provide a lexicographic sort to make this a total ordering.
1917 return PatchSuffix < RHSPatchSuffix;
1918 }
1919
1920 // The versions are equal.
1921 return false;
1922 }
1923
1924 /// Parse a GCCVersion object out of a string of text.
1925 ///
1926 /// This is the primary means of forming GCCVersion objects.
1927 /*static*/
Parse(StringRef VersionText)1928 Generic_GCC::GCCVersion Generic_GCC::GCCVersion::Parse(StringRef VersionText) {
1929 const GCCVersion BadVersion = {VersionText.str(), -1, -1, -1, "", "", ""};
1930 std::pair<StringRef, StringRef> First = VersionText.split('.');
1931 std::pair<StringRef, StringRef> Second = First.second.split('.');
1932
1933 GCCVersion GoodVersion = {VersionText.str(), -1, -1, -1, "", "", ""};
1934 if (First.first.getAsInteger(10, GoodVersion.Major) || GoodVersion.Major < 0)
1935 return BadVersion;
1936 GoodVersion.MajorStr = First.first.str();
1937 if (First.second.empty())
1938 return GoodVersion;
1939 StringRef MinorStr = Second.first;
1940 if (Second.second.empty()) {
1941 if (size_t EndNumber = MinorStr.find_first_not_of("0123456789")) {
1942 GoodVersion.PatchSuffix = std::string(MinorStr.substr(EndNumber));
1943 MinorStr = MinorStr.slice(0, EndNumber);
1944 }
1945 }
1946 if (MinorStr.getAsInteger(10, GoodVersion.Minor) || GoodVersion.Minor < 0)
1947 return BadVersion;
1948 GoodVersion.MinorStr = MinorStr.str();
1949
1950 // First look for a number prefix and parse that if present. Otherwise just
1951 // stash the entire patch string in the suffix, and leave the number
1952 // unspecified. This covers versions strings such as:
1953 // 5 (handled above)
1954 // 4.4
1955 // 4.4-patched
1956 // 4.4.0
1957 // 4.4.x
1958 // 4.4.2-rc4
1959 // 4.4.x-patched
1960 // And retains any patch number it finds.
1961 StringRef PatchText = Second.second;
1962 if (!PatchText.empty()) {
1963 if (size_t EndNumber = PatchText.find_first_not_of("0123456789")) {
1964 // Try to parse the number and any suffix.
1965 if (PatchText.slice(0, EndNumber).getAsInteger(10, GoodVersion.Patch) ||
1966 GoodVersion.Patch < 0)
1967 return BadVersion;
1968 GoodVersion.PatchSuffix = std::string(PatchText.substr(EndNumber));
1969 }
1970 }
1971
1972 return GoodVersion;
1973 }
1974
getGCCToolchainDir(const ArgList & Args,llvm::StringRef SysRoot)1975 static llvm::StringRef getGCCToolchainDir(const ArgList &Args,
1976 llvm::StringRef SysRoot) {
1977 const Arg *A = Args.getLastArg(clang::driver::options::OPT_gcc_toolchain);
1978 if (A)
1979 return A->getValue();
1980
1981 // If we have a SysRoot, ignore GCC_INSTALL_PREFIX.
1982 // GCC_INSTALL_PREFIX specifies the gcc installation for the default
1983 // sysroot and is likely not valid with a different sysroot.
1984 if (!SysRoot.empty())
1985 return "";
1986
1987 return GCC_INSTALL_PREFIX;
1988 }
1989
1990 /// Initialize a GCCInstallationDetector from the driver.
1991 ///
1992 /// This performs all of the autodetection and sets up the various paths.
1993 /// Once constructed, a GCCInstallationDetector is essentially immutable.
1994 ///
1995 /// FIXME: We shouldn't need an explicit TargetTriple parameter here, and
1996 /// should instead pull the target out of the driver. This is currently
1997 /// necessary because the driver doesn't store the final version of the target
1998 /// triple.
init(const llvm::Triple & TargetTriple,const ArgList & Args,ArrayRef<std::string> ExtraTripleAliases)1999 void Generic_GCC::GCCInstallationDetector::init(
2000 const llvm::Triple &TargetTriple, const ArgList &Args,
2001 ArrayRef<std::string> ExtraTripleAliases) {
2002 llvm::Triple BiarchVariantTriple = TargetTriple.isArch32Bit()
2003 ? TargetTriple.get64BitArchVariant()
2004 : TargetTriple.get32BitArchVariant();
2005 // The library directories which may contain GCC installations.
2006 SmallVector<StringRef, 4> CandidateLibDirs, CandidateBiarchLibDirs;
2007 // The compatible GCC triples for this particular architecture.
2008 SmallVector<StringRef, 16> CandidateTripleAliases;
2009 SmallVector<StringRef, 16> CandidateBiarchTripleAliases;
2010 CollectLibDirsAndTriples(TargetTriple, BiarchVariantTriple, CandidateLibDirs,
2011 CandidateTripleAliases, CandidateBiarchLibDirs,
2012 CandidateBiarchTripleAliases);
2013
2014 // If --gcc-install-dir= is specified, skip filesystem detection.
2015 if (const Arg *A =
2016 Args.getLastArg(clang::driver::options::OPT_gcc_install_dir_EQ);
2017 A && A->getValue()[0]) {
2018 StringRef InstallDir = A->getValue();
2019 if (!ScanGCCForMultilibs(TargetTriple, Args, InstallDir, false)) {
2020 D.Diag(diag::err_drv_invalid_gcc_install_dir) << InstallDir;
2021 } else {
2022 (void)InstallDir.consume_back("/");
2023 StringRef VersionText = llvm::sys::path::filename(InstallDir);
2024 StringRef TripleText =
2025 llvm::sys::path::filename(llvm::sys::path::parent_path(InstallDir));
2026
2027 Version = GCCVersion::Parse(VersionText);
2028 GCCTriple.setTriple(TripleText);
2029 GCCInstallPath = std::string(InstallDir);
2030 GCCParentLibPath = GCCInstallPath + "/../../..";
2031 IsValid = true;
2032 }
2033 return;
2034 }
2035
2036 // Compute the set of prefixes for our search.
2037 SmallVector<std::string, 8> Prefixes;
2038 StringRef GCCToolchainDir = getGCCToolchainDir(Args, D.SysRoot);
2039 if (GCCToolchainDir != "") {
2040 if (GCCToolchainDir.back() == '/')
2041 GCCToolchainDir = GCCToolchainDir.drop_back(); // remove the /
2042
2043 Prefixes.push_back(std::string(GCCToolchainDir));
2044 } else {
2045 // If we have a SysRoot, try that first.
2046 if (!D.SysRoot.empty()) {
2047 Prefixes.push_back(D.SysRoot);
2048 AddDefaultGCCPrefixes(TargetTriple, Prefixes, D.SysRoot);
2049 }
2050
2051 // Then look for gcc installed alongside clang.
2052 Prefixes.push_back(D.InstalledDir + "/..");
2053
2054 // Next, look for prefix(es) that correspond to distribution-supplied gcc
2055 // installations.
2056 if (D.SysRoot.empty()) {
2057 // Typically /usr.
2058 AddDefaultGCCPrefixes(TargetTriple, Prefixes, D.SysRoot);
2059 }
2060
2061 // Try to respect gcc-config on Gentoo if --gcc-toolchain is not provided.
2062 // This avoids accidentally enforcing the system GCC version when using a
2063 // custom toolchain.
2064 SmallVector<StringRef, 16> GentooTestTriples;
2065 // Try to match an exact triple as target triple first.
2066 // e.g. crossdev -S x86_64-gentoo-linux-gnu will install gcc libs for
2067 // x86_64-gentoo-linux-gnu. But "clang -target x86_64-gentoo-linux-gnu"
2068 // may pick the libraries for x86_64-pc-linux-gnu even when exact matching
2069 // triple x86_64-gentoo-linux-gnu is present.
2070 GentooTestTriples.push_back(TargetTriple.str());
2071 // Check rest of triples.
2072 GentooTestTriples.append(ExtraTripleAliases.begin(),
2073 ExtraTripleAliases.end());
2074 GentooTestTriples.append(CandidateTripleAliases.begin(),
2075 CandidateTripleAliases.end());
2076 if (ScanGentooConfigs(TargetTriple, Args, GentooTestTriples,
2077 CandidateBiarchTripleAliases))
2078 return;
2079 }
2080
2081 // Loop over the various components which exist and select the best GCC
2082 // installation available. GCC installs are ranked by version number.
2083 const GCCVersion VersionZero = GCCVersion::Parse("0.0.0");
2084 Version = VersionZero;
2085 for (const std::string &Prefix : Prefixes) {
2086 auto &VFS = D.getVFS();
2087 if (!VFS.exists(Prefix))
2088 continue;
2089 for (StringRef Suffix : CandidateLibDirs) {
2090 const std::string LibDir = concat(Prefix, Suffix);
2091 if (!VFS.exists(LibDir))
2092 continue;
2093 // Maybe filter out <libdir>/gcc and <libdir>/gcc-cross.
2094 bool GCCDirExists = VFS.exists(LibDir + "/gcc");
2095 bool GCCCrossDirExists = VFS.exists(LibDir + "/gcc-cross");
2096 // Try to match the exact target triple first.
2097 ScanLibDirForGCCTriple(TargetTriple, Args, LibDir, TargetTriple.str(),
2098 false, GCCDirExists, GCCCrossDirExists);
2099 // Try rest of possible triples.
2100 for (StringRef Candidate : ExtraTripleAliases) // Try these first.
2101 ScanLibDirForGCCTriple(TargetTriple, Args, LibDir, Candidate, false,
2102 GCCDirExists, GCCCrossDirExists);
2103 for (StringRef Candidate : CandidateTripleAliases)
2104 ScanLibDirForGCCTriple(TargetTriple, Args, LibDir, Candidate, false,
2105 GCCDirExists, GCCCrossDirExists);
2106 }
2107 for (StringRef Suffix : CandidateBiarchLibDirs) {
2108 const std::string LibDir = Prefix + Suffix.str();
2109 if (!VFS.exists(LibDir))
2110 continue;
2111 bool GCCDirExists = VFS.exists(LibDir + "/gcc");
2112 bool GCCCrossDirExists = VFS.exists(LibDir + "/gcc-cross");
2113 for (StringRef Candidate : CandidateBiarchTripleAliases)
2114 ScanLibDirForGCCTriple(TargetTriple, Args, LibDir, Candidate, true,
2115 GCCDirExists, GCCCrossDirExists);
2116 }
2117
2118 // Skip other prefixes once a GCC installation is found.
2119 if (Version > VersionZero)
2120 break;
2121 }
2122 }
2123
print(raw_ostream & OS) const2124 void Generic_GCC::GCCInstallationDetector::print(raw_ostream &OS) const {
2125 for (const auto &InstallPath : CandidateGCCInstallPaths)
2126 OS << "Found candidate GCC installation: " << InstallPath << "\n";
2127
2128 if (!GCCInstallPath.empty())
2129 OS << "Selected GCC installation: " << GCCInstallPath << "\n";
2130
2131 for (const auto &Multilib : Multilibs)
2132 OS << "Candidate multilib: " << Multilib << "\n";
2133
2134 if (Multilibs.size() != 0 || !SelectedMultilib.isDefault())
2135 OS << "Selected multilib: " << SelectedMultilib << "\n";
2136 }
2137
getBiarchSibling(Multilib & M) const2138 bool Generic_GCC::GCCInstallationDetector::getBiarchSibling(Multilib &M) const {
2139 if (BiarchSibling) {
2140 M = *BiarchSibling;
2141 return true;
2142 }
2143 return false;
2144 }
2145
AddDefaultGCCPrefixes(const llvm::Triple & TargetTriple,SmallVectorImpl<std::string> & Prefixes,StringRef SysRoot)2146 void Generic_GCC::GCCInstallationDetector::AddDefaultGCCPrefixes(
2147 const llvm::Triple &TargetTriple, SmallVectorImpl<std::string> &Prefixes,
2148 StringRef SysRoot) {
2149 if (TargetTriple.getOS() == llvm::Triple::Solaris) {
2150 // Solaris is a special case.
2151 // The GCC installation is under
2152 // /usr/gcc/<major>.<minor>/lib/gcc/<triple>/<major>.<minor>.<patch>/
2153 // so we need to find those /usr/gcc/*/lib/gcc libdirs and go with
2154 // /usr/gcc/<version> as a prefix.
2155
2156 std::string PrefixDir = concat(SysRoot, "/usr/gcc");
2157 std::error_code EC;
2158 for (llvm::vfs::directory_iterator LI = D.getVFS().dir_begin(PrefixDir, EC),
2159 LE;
2160 !EC && LI != LE; LI = LI.increment(EC)) {
2161 StringRef VersionText = llvm::sys::path::filename(LI->path());
2162 GCCVersion CandidateVersion = GCCVersion::Parse(VersionText);
2163
2164 // Filter out obviously bad entries.
2165 if (CandidateVersion.Major == -1 || CandidateVersion.isOlderThan(4, 1, 1))
2166 continue;
2167
2168 std::string CandidatePrefix = PrefixDir + "/" + VersionText.str();
2169 std::string CandidateLibPath = CandidatePrefix + "/lib/gcc";
2170 if (!D.getVFS().exists(CandidateLibPath))
2171 continue;
2172
2173 Prefixes.push_back(CandidatePrefix);
2174 }
2175 return;
2176 }
2177
2178 // For Linux, if --sysroot is not specified, look for RHEL/CentOS devtoolsets
2179 // and gcc-toolsets.
2180 if (SysRoot.empty() && TargetTriple.getOS() == llvm::Triple::Linux &&
2181 D.getVFS().exists("/opt/rh")) {
2182 // TODO: We may want to remove this, since the functionality
2183 // can be achieved using config files.
2184 Prefixes.push_back("/opt/rh/gcc-toolset-12/root/usr");
2185 Prefixes.push_back("/opt/rh/gcc-toolset-11/root/usr");
2186 Prefixes.push_back("/opt/rh/gcc-toolset-10/root/usr");
2187 Prefixes.push_back("/opt/rh/devtoolset-12/root/usr");
2188 Prefixes.push_back("/opt/rh/devtoolset-11/root/usr");
2189 Prefixes.push_back("/opt/rh/devtoolset-10/root/usr");
2190 Prefixes.push_back("/opt/rh/devtoolset-9/root/usr");
2191 Prefixes.push_back("/opt/rh/devtoolset-8/root/usr");
2192 Prefixes.push_back("/opt/rh/devtoolset-7/root/usr");
2193 Prefixes.push_back("/opt/rh/devtoolset-6/root/usr");
2194 Prefixes.push_back("/opt/rh/devtoolset-4/root/usr");
2195 Prefixes.push_back("/opt/rh/devtoolset-3/root/usr");
2196 Prefixes.push_back("/opt/rh/devtoolset-2/root/usr");
2197 }
2198
2199 // Fall back to /usr which is used by most non-Solaris systems.
2200 Prefixes.push_back(concat(SysRoot, "/usr"));
2201 }
2202
CollectLibDirsAndTriples(const llvm::Triple & TargetTriple,const llvm::Triple & BiarchTriple,SmallVectorImpl<StringRef> & LibDirs,SmallVectorImpl<StringRef> & TripleAliases,SmallVectorImpl<StringRef> & BiarchLibDirs,SmallVectorImpl<StringRef> & BiarchTripleAliases)2203 /*static*/ void Generic_GCC::GCCInstallationDetector::CollectLibDirsAndTriples(
2204 const llvm::Triple &TargetTriple, const llvm::Triple &BiarchTriple,
2205 SmallVectorImpl<StringRef> &LibDirs,
2206 SmallVectorImpl<StringRef> &TripleAliases,
2207 SmallVectorImpl<StringRef> &BiarchLibDirs,
2208 SmallVectorImpl<StringRef> &BiarchTripleAliases) {
2209 // Declare a bunch of static data sets that we'll select between below. These
2210 // are specifically designed to always refer to string literals to avoid any
2211 // lifetime or initialization issues.
2212 //
2213 // The *Triples variables hard code some triples so that, for example,
2214 // --target=aarch64 (incomplete triple) can detect lib/aarch64-linux-gnu.
2215 // They are not needed when the user has correct LLVM_DEFAULT_TARGET_TRIPLE
2216 // and always uses the full --target (e.g. --target=aarch64-linux-gnu). The
2217 // lists should shrink over time. Please don't add more elements to *Triples.
2218 static const char *const AArch64LibDirs[] = {"/lib64", "/lib"};
2219 static const char *const AArch64Triples[] = {
2220 "aarch64-none-linux-gnu", "aarch64-linux-gnu", "aarch64-redhat-linux",
2221 "aarch64-suse-linux"};
2222 static const char *const AArch64beLibDirs[] = {"/lib"};
2223 static const char *const AArch64beTriples[] = {"aarch64_be-none-linux-gnu",
2224 "aarch64_be-linux-gnu"};
2225
2226 static const char *const ARMLibDirs[] = {"/lib"};
2227 static const char *const ARMTriples[] = {"arm-linux-gnueabi"};
2228 static const char *const ARMHFTriples[] = {"arm-linux-gnueabihf",
2229 "armv7hl-redhat-linux-gnueabi",
2230 "armv6hl-suse-linux-gnueabi",
2231 "armv7hl-suse-linux-gnueabi"};
2232 static const char *const ARMebLibDirs[] = {"/lib"};
2233 static const char *const ARMebTriples[] = {"armeb-linux-gnueabi"};
2234 static const char *const ARMebHFTriples[] = {
2235 "armeb-linux-gnueabihf", "armebv7hl-redhat-linux-gnueabi"};
2236
2237 static const char *const AVRLibDirs[] = {"/lib"};
2238 static const char *const AVRTriples[] = {"avr"};
2239
2240 static const char *const CSKYLibDirs[] = {"/lib"};
2241 static const char *const CSKYTriples[] = {
2242 "csky-linux-gnuabiv2", "csky-linux-uclibcabiv2", "csky-elf-noneabiv2"};
2243
2244 static const char *const X86_64LibDirs[] = {"/lib64", "/lib"};
2245 static const char *const X86_64Triples[] = {
2246 "x86_64-linux-gnu", "x86_64-unknown-linux-gnu",
2247 "x86_64-pc-linux-gnu", "x86_64-redhat-linux6E",
2248 "x86_64-redhat-linux", "x86_64-suse-linux",
2249 "x86_64-manbo-linux-gnu", "x86_64-linux-gnu",
2250 "x86_64-slackware-linux", "x86_64-unknown-linux",
2251 "x86_64-amazon-linux"};
2252 static const char *const X32Triples[] = {"x86_64-linux-gnux32",
2253 "x86_64-pc-linux-gnux32"};
2254 static const char *const X32LibDirs[] = {"/libx32", "/lib"};
2255 static const char *const X86LibDirs[] = {"/lib32", "/lib"};
2256 static const char *const X86Triples[] = {
2257 "i586-linux-gnu", "i686-linux-gnu", "i686-pc-linux-gnu",
2258 "i386-redhat-linux6E", "i686-redhat-linux", "i386-redhat-linux",
2259 "i586-suse-linux", "i686-montavista-linux", "i686-gnu",
2260 };
2261
2262 static const char *const LoongArch64LibDirs[] = {"/lib64", "/lib"};
2263 static const char *const LoongArch64Triples[] = {
2264 "loongarch64-linux-gnu", "loongarch64-unknown-linux-gnu"};
2265
2266 static const char *const M68kLibDirs[] = {"/lib"};
2267 static const char *const M68kTriples[] = {
2268 "m68k-linux-gnu", "m68k-unknown-linux-gnu", "m68k-suse-linux"};
2269
2270 static const char *const MIPSLibDirs[] = {"/libo32", "/lib"};
2271 static const char *const MIPSTriples[] = {
2272 "mips-linux-gnu", "mips-mti-linux", "mips-mti-linux-gnu",
2273 "mips-img-linux-gnu", "mipsisa32r6-linux-gnu"};
2274 static const char *const MIPSELLibDirs[] = {"/libo32", "/lib"};
2275 static const char *const MIPSELTriples[] = {
2276 "mipsel-linux-gnu", "mips-img-linux-gnu", "mipsisa32r6el-linux-gnu"};
2277
2278 static const char *const MIPS64LibDirs[] = {"/lib64", "/lib"};
2279 static const char *const MIPS64Triples[] = {
2280 "mips64-linux-gnu", "mips-mti-linux-gnu",
2281 "mips-img-linux-gnu", "mips64-linux-gnuabi64",
2282 "mipsisa64r6-linux-gnu", "mipsisa64r6-linux-gnuabi64"};
2283 static const char *const MIPS64ELLibDirs[] = {"/lib64", "/lib"};
2284 static const char *const MIPS64ELTriples[] = {
2285 "mips64el-linux-gnu", "mips-mti-linux-gnu",
2286 "mips-img-linux-gnu", "mips64el-linux-gnuabi64",
2287 "mipsisa64r6el-linux-gnu", "mipsisa64r6el-linux-gnuabi64"};
2288
2289 static const char *const MIPSN32LibDirs[] = {"/lib32"};
2290 static const char *const MIPSN32Triples[] = {"mips64-linux-gnuabin32",
2291 "mipsisa64r6-linux-gnuabin32"};
2292 static const char *const MIPSN32ELLibDirs[] = {"/lib32"};
2293 static const char *const MIPSN32ELTriples[] = {
2294 "mips64el-linux-gnuabin32", "mipsisa64r6el-linux-gnuabin32"};
2295
2296 static const char *const MSP430LibDirs[] = {"/lib"};
2297 static const char *const MSP430Triples[] = {"msp430-elf"};
2298
2299 static const char *const PPCLibDirs[] = {"/lib32", "/lib"};
2300 static const char *const PPCTriples[] = {
2301 "powerpc-linux-gnu", "powerpc-unknown-linux-gnu", "powerpc-linux-gnuspe",
2302 // On 32-bit PowerPC systems running SUSE Linux, gcc is configured as a
2303 // 64-bit compiler which defaults to "-m32", hence "powerpc64-suse-linux".
2304 "powerpc64-suse-linux", "powerpc-montavista-linuxspe"};
2305 static const char *const PPCLELibDirs[] = {"/lib32", "/lib"};
2306 static const char *const PPCLETriples[] = {"powerpcle-linux-gnu",
2307 "powerpcle-unknown-linux-gnu",
2308 "powerpcle-linux-musl"};
2309
2310 static const char *const PPC64LibDirs[] = {"/lib64", "/lib"};
2311 static const char *const PPC64Triples[] = {
2312 "powerpc64-linux-gnu", "powerpc64-unknown-linux-gnu",
2313 "powerpc64-suse-linux", "ppc64-redhat-linux"};
2314 static const char *const PPC64LELibDirs[] = {"/lib64", "/lib"};
2315 static const char *const PPC64LETriples[] = {
2316 "powerpc64le-linux-gnu", "powerpc64le-unknown-linux-gnu",
2317 "powerpc64le-none-linux-gnu", "powerpc64le-suse-linux",
2318 "ppc64le-redhat-linux"};
2319
2320 static const char *const RISCV32LibDirs[] = {"/lib32", "/lib"};
2321 static const char *const RISCV32Triples[] = {"riscv32-unknown-linux-gnu",
2322 "riscv32-linux-gnu",
2323 "riscv32-unknown-elf"};
2324 static const char *const RISCV64LibDirs[] = {"/lib64", "/lib"};
2325 static const char *const RISCV64Triples[] = {"riscv64-unknown-linux-gnu",
2326 "riscv64-linux-gnu",
2327 "riscv64-unknown-elf"};
2328
2329 static const char *const SPARCv8LibDirs[] = {"/lib32", "/lib"};
2330 static const char *const SPARCv8Triples[] = {"sparc-linux-gnu",
2331 "sparcv8-linux-gnu"};
2332 static const char *const SPARCv9LibDirs[] = {"/lib64", "/lib"};
2333 static const char *const SPARCv9Triples[] = {"sparc64-linux-gnu",
2334 "sparcv9-linux-gnu"};
2335
2336 static const char *const SystemZLibDirs[] = {"/lib64", "/lib"};
2337 static const char *const SystemZTriples[] = {
2338 "s390x-linux-gnu", "s390x-unknown-linux-gnu", "s390x-ibm-linux-gnu",
2339 "s390x-suse-linux", "s390x-redhat-linux"};
2340
2341
2342 using std::begin;
2343 using std::end;
2344
2345 if (TargetTriple.getOS() == llvm::Triple::Solaris) {
2346 static const char *const SolarisLibDirs[] = {"/lib"};
2347 static const char *const SolarisSparcV8Triples[] = {
2348 "sparc-sun-solaris2.11", "sparc-sun-solaris2.12"};
2349 static const char *const SolarisSparcV9Triples[] = {
2350 "sparcv9-sun-solaris2.11", "sparcv9-sun-solaris2.12"};
2351 static const char *const SolarisX86Triples[] = {"i386-pc-solaris2.11",
2352 "i386-pc-solaris2.12"};
2353 static const char *const SolarisX86_64Triples[] = {"x86_64-pc-solaris2.11",
2354 "x86_64-pc-solaris2.12"};
2355 LibDirs.append(begin(SolarisLibDirs), end(SolarisLibDirs));
2356 BiarchLibDirs.append(begin(SolarisLibDirs), end(SolarisLibDirs));
2357 switch (TargetTriple.getArch()) {
2358 case llvm::Triple::x86:
2359 TripleAliases.append(begin(SolarisX86Triples), end(SolarisX86Triples));
2360 BiarchTripleAliases.append(begin(SolarisX86_64Triples),
2361 end(SolarisX86_64Triples));
2362 break;
2363 case llvm::Triple::x86_64:
2364 TripleAliases.append(begin(SolarisX86_64Triples),
2365 end(SolarisX86_64Triples));
2366 BiarchTripleAliases.append(begin(SolarisX86Triples),
2367 end(SolarisX86Triples));
2368 break;
2369 case llvm::Triple::sparc:
2370 TripleAliases.append(begin(SolarisSparcV8Triples),
2371 end(SolarisSparcV8Triples));
2372 BiarchTripleAliases.append(begin(SolarisSparcV9Triples),
2373 end(SolarisSparcV9Triples));
2374 break;
2375 case llvm::Triple::sparcv9:
2376 TripleAliases.append(begin(SolarisSparcV9Triples),
2377 end(SolarisSparcV9Triples));
2378 BiarchTripleAliases.append(begin(SolarisSparcV8Triples),
2379 end(SolarisSparcV8Triples));
2380 break;
2381 default:
2382 break;
2383 }
2384 return;
2385 }
2386
2387 // Android targets should not use GNU/Linux tools or libraries.
2388 if (TargetTriple.isAndroid()) {
2389 static const char *const AArch64AndroidTriples[] = {
2390 "aarch64-linux-android"};
2391 static const char *const ARMAndroidTriples[] = {"arm-linux-androideabi"};
2392 static const char *const MIPSELAndroidTriples[] = {"mipsel-linux-android"};
2393 static const char *const MIPS64ELAndroidTriples[] = {
2394 "mips64el-linux-android"};
2395 static const char *const X86AndroidTriples[] = {"i686-linux-android"};
2396 static const char *const X86_64AndroidTriples[] = {"x86_64-linux-android"};
2397
2398 switch (TargetTriple.getArch()) {
2399 case llvm::Triple::aarch64:
2400 LibDirs.append(begin(AArch64LibDirs), end(AArch64LibDirs));
2401 TripleAliases.append(begin(AArch64AndroidTriples),
2402 end(AArch64AndroidTriples));
2403 break;
2404 case llvm::Triple::arm:
2405 case llvm::Triple::thumb:
2406 LibDirs.append(begin(ARMLibDirs), end(ARMLibDirs));
2407 TripleAliases.append(begin(ARMAndroidTriples), end(ARMAndroidTriples));
2408 break;
2409 case llvm::Triple::mipsel:
2410 LibDirs.append(begin(MIPSELLibDirs), end(MIPSELLibDirs));
2411 TripleAliases.append(begin(MIPSELAndroidTriples),
2412 end(MIPSELAndroidTriples));
2413 BiarchLibDirs.append(begin(MIPS64ELLibDirs), end(MIPS64ELLibDirs));
2414 BiarchTripleAliases.append(begin(MIPS64ELAndroidTriples),
2415 end(MIPS64ELAndroidTriples));
2416 break;
2417 case llvm::Triple::mips64el:
2418 LibDirs.append(begin(MIPS64ELLibDirs), end(MIPS64ELLibDirs));
2419 TripleAliases.append(begin(MIPS64ELAndroidTriples),
2420 end(MIPS64ELAndroidTriples));
2421 BiarchLibDirs.append(begin(MIPSELLibDirs), end(MIPSELLibDirs));
2422 BiarchTripleAliases.append(begin(MIPSELAndroidTriples),
2423 end(MIPSELAndroidTriples));
2424 break;
2425 case llvm::Triple::x86_64:
2426 LibDirs.append(begin(X86_64LibDirs), end(X86_64LibDirs));
2427 TripleAliases.append(begin(X86_64AndroidTriples),
2428 end(X86_64AndroidTriples));
2429 BiarchLibDirs.append(begin(X86LibDirs), end(X86LibDirs));
2430 BiarchTripleAliases.append(begin(X86AndroidTriples),
2431 end(X86AndroidTriples));
2432 break;
2433 case llvm::Triple::x86:
2434 LibDirs.append(begin(X86LibDirs), end(X86LibDirs));
2435 TripleAliases.append(begin(X86AndroidTriples), end(X86AndroidTriples));
2436 BiarchLibDirs.append(begin(X86_64LibDirs), end(X86_64LibDirs));
2437 BiarchTripleAliases.append(begin(X86_64AndroidTriples),
2438 end(X86_64AndroidTriples));
2439 break;
2440 default:
2441 break;
2442 }
2443
2444 return;
2445 }
2446
2447 switch (TargetTriple.getArch()) {
2448 case llvm::Triple::aarch64:
2449 LibDirs.append(begin(AArch64LibDirs), end(AArch64LibDirs));
2450 TripleAliases.append(begin(AArch64Triples), end(AArch64Triples));
2451 BiarchLibDirs.append(begin(AArch64LibDirs), end(AArch64LibDirs));
2452 BiarchTripleAliases.append(begin(AArch64Triples), end(AArch64Triples));
2453 break;
2454 case llvm::Triple::aarch64_be:
2455 LibDirs.append(begin(AArch64beLibDirs), end(AArch64beLibDirs));
2456 TripleAliases.append(begin(AArch64beTriples), end(AArch64beTriples));
2457 BiarchLibDirs.append(begin(AArch64beLibDirs), end(AArch64beLibDirs));
2458 BiarchTripleAliases.append(begin(AArch64beTriples), end(AArch64beTriples));
2459 break;
2460 case llvm::Triple::arm:
2461 case llvm::Triple::thumb:
2462 LibDirs.append(begin(ARMLibDirs), end(ARMLibDirs));
2463 if (TargetTriple.getEnvironment() == llvm::Triple::GNUEABIHF) {
2464 TripleAliases.append(begin(ARMHFTriples), end(ARMHFTriples));
2465 } else {
2466 TripleAliases.append(begin(ARMTriples), end(ARMTriples));
2467 }
2468 break;
2469 case llvm::Triple::armeb:
2470 case llvm::Triple::thumbeb:
2471 LibDirs.append(begin(ARMebLibDirs), end(ARMebLibDirs));
2472 if (TargetTriple.getEnvironment() == llvm::Triple::GNUEABIHF) {
2473 TripleAliases.append(begin(ARMebHFTriples), end(ARMebHFTriples));
2474 } else {
2475 TripleAliases.append(begin(ARMebTriples), end(ARMebTriples));
2476 }
2477 break;
2478 case llvm::Triple::avr:
2479 LibDirs.append(begin(AVRLibDirs), end(AVRLibDirs));
2480 TripleAliases.append(begin(AVRTriples), end(AVRTriples));
2481 break;
2482 case llvm::Triple::csky:
2483 LibDirs.append(begin(CSKYLibDirs), end(CSKYLibDirs));
2484 TripleAliases.append(begin(CSKYTriples), end(CSKYTriples));
2485 break;
2486 case llvm::Triple::x86_64:
2487 if (TargetTriple.isX32()) {
2488 LibDirs.append(begin(X32LibDirs), end(X32LibDirs));
2489 TripleAliases.append(begin(X32Triples), end(X32Triples));
2490 BiarchLibDirs.append(begin(X86_64LibDirs), end(X86_64LibDirs));
2491 BiarchTripleAliases.append(begin(X86_64Triples), end(X86_64Triples));
2492 } else {
2493 LibDirs.append(begin(X86_64LibDirs), end(X86_64LibDirs));
2494 TripleAliases.append(begin(X86_64Triples), end(X86_64Triples));
2495 BiarchLibDirs.append(begin(X32LibDirs), end(X32LibDirs));
2496 BiarchTripleAliases.append(begin(X32Triples), end(X32Triples));
2497 }
2498 BiarchLibDirs.append(begin(X86LibDirs), end(X86LibDirs));
2499 BiarchTripleAliases.append(begin(X86Triples), end(X86Triples));
2500 break;
2501 case llvm::Triple::x86:
2502 LibDirs.append(begin(X86LibDirs), end(X86LibDirs));
2503 // MCU toolchain is 32 bit only and its triple alias is TargetTriple
2504 // itself, which will be appended below.
2505 if (!TargetTriple.isOSIAMCU()) {
2506 TripleAliases.append(begin(X86Triples), end(X86Triples));
2507 BiarchLibDirs.append(begin(X86_64LibDirs), end(X86_64LibDirs));
2508 BiarchTripleAliases.append(begin(X86_64Triples), end(X86_64Triples));
2509 BiarchLibDirs.append(begin(X32LibDirs), end(X32LibDirs));
2510 BiarchTripleAliases.append(begin(X32Triples), end(X32Triples));
2511 }
2512 break;
2513 // TODO: Handle loongarch32.
2514 case llvm::Triple::loongarch64:
2515 LibDirs.append(begin(LoongArch64LibDirs), end(LoongArch64LibDirs));
2516 TripleAliases.append(begin(LoongArch64Triples), end(LoongArch64Triples));
2517 break;
2518 case llvm::Triple::m68k:
2519 LibDirs.append(begin(M68kLibDirs), end(M68kLibDirs));
2520 TripleAliases.append(begin(M68kTriples), end(M68kTriples));
2521 break;
2522 case llvm::Triple::mips:
2523 LibDirs.append(begin(MIPSLibDirs), end(MIPSLibDirs));
2524 TripleAliases.append(begin(MIPSTriples), end(MIPSTriples));
2525 BiarchLibDirs.append(begin(MIPS64LibDirs), end(MIPS64LibDirs));
2526 BiarchTripleAliases.append(begin(MIPS64Triples), end(MIPS64Triples));
2527 BiarchLibDirs.append(begin(MIPSN32LibDirs), end(MIPSN32LibDirs));
2528 BiarchTripleAliases.append(begin(MIPSN32Triples), end(MIPSN32Triples));
2529 break;
2530 case llvm::Triple::mipsel:
2531 LibDirs.append(begin(MIPSELLibDirs), end(MIPSELLibDirs));
2532 TripleAliases.append(begin(MIPSELTriples), end(MIPSELTriples));
2533 TripleAliases.append(begin(MIPSTriples), end(MIPSTriples));
2534 BiarchLibDirs.append(begin(MIPS64ELLibDirs), end(MIPS64ELLibDirs));
2535 BiarchTripleAliases.append(begin(MIPS64ELTriples), end(MIPS64ELTriples));
2536 BiarchLibDirs.append(begin(MIPSN32ELLibDirs), end(MIPSN32ELLibDirs));
2537 BiarchTripleAliases.append(begin(MIPSN32ELTriples), end(MIPSN32ELTriples));
2538 break;
2539 case llvm::Triple::mips64:
2540 LibDirs.append(begin(MIPS64LibDirs), end(MIPS64LibDirs));
2541 TripleAliases.append(begin(MIPS64Triples), end(MIPS64Triples));
2542 BiarchLibDirs.append(begin(MIPSLibDirs), end(MIPSLibDirs));
2543 BiarchTripleAliases.append(begin(MIPSTriples), end(MIPSTriples));
2544 BiarchLibDirs.append(begin(MIPSN32LibDirs), end(MIPSN32LibDirs));
2545 BiarchTripleAliases.append(begin(MIPSN32Triples), end(MIPSN32Triples));
2546 break;
2547 case llvm::Triple::mips64el:
2548 LibDirs.append(begin(MIPS64ELLibDirs), end(MIPS64ELLibDirs));
2549 TripleAliases.append(begin(MIPS64ELTriples), end(MIPS64ELTriples));
2550 BiarchLibDirs.append(begin(MIPSELLibDirs), end(MIPSELLibDirs));
2551 BiarchTripleAliases.append(begin(MIPSELTriples), end(MIPSELTriples));
2552 BiarchLibDirs.append(begin(MIPSN32ELLibDirs), end(MIPSN32ELLibDirs));
2553 BiarchTripleAliases.append(begin(MIPSN32ELTriples), end(MIPSN32ELTriples));
2554 BiarchTripleAliases.append(begin(MIPSTriples), end(MIPSTriples));
2555 break;
2556 case llvm::Triple::msp430:
2557 LibDirs.append(begin(MSP430LibDirs), end(MSP430LibDirs));
2558 TripleAliases.append(begin(MSP430Triples), end(MSP430Triples));
2559 break;
2560 case llvm::Triple::ppc:
2561 LibDirs.append(begin(PPCLibDirs), end(PPCLibDirs));
2562 TripleAliases.append(begin(PPCTriples), end(PPCTriples));
2563 BiarchLibDirs.append(begin(PPC64LibDirs), end(PPC64LibDirs));
2564 BiarchTripleAliases.append(begin(PPC64Triples), end(PPC64Triples));
2565 break;
2566 case llvm::Triple::ppcle:
2567 LibDirs.append(begin(PPCLELibDirs), end(PPCLELibDirs));
2568 TripleAliases.append(begin(PPCLETriples), end(PPCLETriples));
2569 BiarchLibDirs.append(begin(PPC64LELibDirs), end(PPC64LELibDirs));
2570 BiarchTripleAliases.append(begin(PPC64LETriples), end(PPC64LETriples));
2571 break;
2572 case llvm::Triple::ppc64:
2573 LibDirs.append(begin(PPC64LibDirs), end(PPC64LibDirs));
2574 TripleAliases.append(begin(PPC64Triples), end(PPC64Triples));
2575 BiarchLibDirs.append(begin(PPCLibDirs), end(PPCLibDirs));
2576 BiarchTripleAliases.append(begin(PPCTriples), end(PPCTriples));
2577 break;
2578 case llvm::Triple::ppc64le:
2579 LibDirs.append(begin(PPC64LELibDirs), end(PPC64LELibDirs));
2580 TripleAliases.append(begin(PPC64LETriples), end(PPC64LETriples));
2581 BiarchLibDirs.append(begin(PPCLELibDirs), end(PPCLELibDirs));
2582 BiarchTripleAliases.append(begin(PPCLETriples), end(PPCLETriples));
2583 break;
2584 case llvm::Triple::riscv32:
2585 LibDirs.append(begin(RISCV32LibDirs), end(RISCV32LibDirs));
2586 TripleAliases.append(begin(RISCV32Triples), end(RISCV32Triples));
2587 BiarchLibDirs.append(begin(RISCV64LibDirs), end(RISCV64LibDirs));
2588 BiarchTripleAliases.append(begin(RISCV64Triples), end(RISCV64Triples));
2589 break;
2590 case llvm::Triple::riscv64:
2591 LibDirs.append(begin(RISCV64LibDirs), end(RISCV64LibDirs));
2592 TripleAliases.append(begin(RISCV64Triples), end(RISCV64Triples));
2593 BiarchLibDirs.append(begin(RISCV32LibDirs), end(RISCV32LibDirs));
2594 BiarchTripleAliases.append(begin(RISCV32Triples), end(RISCV32Triples));
2595 break;
2596 case llvm::Triple::sparc:
2597 case llvm::Triple::sparcel:
2598 LibDirs.append(begin(SPARCv8LibDirs), end(SPARCv8LibDirs));
2599 TripleAliases.append(begin(SPARCv8Triples), end(SPARCv8Triples));
2600 BiarchLibDirs.append(begin(SPARCv9LibDirs), end(SPARCv9LibDirs));
2601 BiarchTripleAliases.append(begin(SPARCv9Triples), end(SPARCv9Triples));
2602 break;
2603 case llvm::Triple::sparcv9:
2604 LibDirs.append(begin(SPARCv9LibDirs), end(SPARCv9LibDirs));
2605 TripleAliases.append(begin(SPARCv9Triples), end(SPARCv9Triples));
2606 BiarchLibDirs.append(begin(SPARCv8LibDirs), end(SPARCv8LibDirs));
2607 BiarchTripleAliases.append(begin(SPARCv8Triples), end(SPARCv8Triples));
2608 break;
2609 case llvm::Triple::systemz:
2610 LibDirs.append(begin(SystemZLibDirs), end(SystemZLibDirs));
2611 TripleAliases.append(begin(SystemZTriples), end(SystemZTriples));
2612 break;
2613 default:
2614 // By default, just rely on the standard lib directories and the original
2615 // triple.
2616 break;
2617 }
2618
2619 // Always append the drivers target triple to the end, in case it doesn't
2620 // match any of our aliases.
2621 TripleAliases.push_back(TargetTriple.str());
2622
2623 // Also include the multiarch variant if it's different.
2624 if (TargetTriple.str() != BiarchTriple.str())
2625 BiarchTripleAliases.push_back(BiarchTriple.str());
2626 }
2627
ScanGCCForMultilibs(const llvm::Triple & TargetTriple,const ArgList & Args,StringRef Path,bool NeedsBiarchSuffix)2628 bool Generic_GCC::GCCInstallationDetector::ScanGCCForMultilibs(
2629 const llvm::Triple &TargetTriple, const ArgList &Args,
2630 StringRef Path, bool NeedsBiarchSuffix) {
2631 llvm::Triple::ArchType TargetArch = TargetTriple.getArch();
2632 DetectedMultilibs Detected;
2633
2634 // Android standalone toolchain could have multilibs for ARM and Thumb.
2635 // Debian mips multilibs behave more like the rest of the biarch ones,
2636 // so handle them there
2637 if (isArmOrThumbArch(TargetArch) && TargetTriple.isAndroid()) {
2638 // It should also work without multilibs in a simplified toolchain.
2639 findAndroidArmMultilibs(D, TargetTriple, Path, Args, Detected);
2640 } else if (TargetTriple.isCSKY()) {
2641 findCSKYMultilibs(D, TargetTriple, Path, Args, Detected);
2642 } else if (TargetTriple.isMIPS()) {
2643 if (!findMIPSMultilibs(D, TargetTriple, Path, Args, Detected))
2644 return false;
2645 } else if (TargetTriple.isRISCV()) {
2646 findRISCVMultilibs(D, TargetTriple, Path, Args, Detected);
2647 } else if (isMSP430(TargetArch)) {
2648 findMSP430Multilibs(D, TargetTriple, Path, Args, Detected);
2649 } else if (TargetArch == llvm::Triple::avr) {
2650 // AVR has no multilibs.
2651 } else if (!findBiarchMultilibs(D, TargetTriple, Path, Args,
2652 NeedsBiarchSuffix, Detected)) {
2653 return false;
2654 }
2655
2656 Multilibs = Detected.Multilibs;
2657 SelectedMultilib = Detected.SelectedMultilib;
2658 BiarchSibling = Detected.BiarchSibling;
2659
2660 return true;
2661 }
2662
ScanLibDirForGCCTriple(const llvm::Triple & TargetTriple,const ArgList & Args,const std::string & LibDir,StringRef CandidateTriple,bool NeedsBiarchSuffix,bool GCCDirExists,bool GCCCrossDirExists)2663 void Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple(
2664 const llvm::Triple &TargetTriple, const ArgList &Args,
2665 const std::string &LibDir, StringRef CandidateTriple,
2666 bool NeedsBiarchSuffix, bool GCCDirExists, bool GCCCrossDirExists) {
2667 // Locations relative to the system lib directory where GCC's triple-specific
2668 // directories might reside.
2669 struct GCCLibSuffix {
2670 // Path from system lib directory to GCC triple-specific directory.
2671 std::string LibSuffix;
2672 // Path from GCC triple-specific directory back to system lib directory.
2673 // This is one '..' component per component in LibSuffix.
2674 StringRef ReversePath;
2675 // Whether this library suffix is relevant for the triple.
2676 bool Active;
2677 } Suffixes[] = {
2678 // This is the normal place.
2679 {"gcc/" + CandidateTriple.str(), "../..", GCCDirExists},
2680
2681 // Debian puts cross-compilers in gcc-cross.
2682 {"gcc-cross/" + CandidateTriple.str(), "../..", GCCCrossDirExists},
2683
2684 // The Freescale PPC SDK has the gcc libraries in
2685 // <sysroot>/usr/lib/<triple>/x.y.z so have a look there as well. Only do
2686 // this on Freescale triples, though, since some systems put a *lot* of
2687 // files in that location, not just GCC installation data.
2688 {CandidateTriple.str(), "..",
2689 TargetTriple.getVendor() == llvm::Triple::Freescale ||
2690 TargetTriple.getVendor() == llvm::Triple::OpenEmbedded}};
2691
2692 for (auto &Suffix : Suffixes) {
2693 if (!Suffix.Active)
2694 continue;
2695
2696 StringRef LibSuffix = Suffix.LibSuffix;
2697 std::error_code EC;
2698 for (llvm::vfs::directory_iterator
2699 LI = D.getVFS().dir_begin(LibDir + "/" + LibSuffix, EC),
2700 LE;
2701 !EC && LI != LE; LI = LI.increment(EC)) {
2702 StringRef VersionText = llvm::sys::path::filename(LI->path());
2703 GCCVersion CandidateVersion = GCCVersion::Parse(VersionText);
2704 if (CandidateVersion.Major != -1) // Filter obviously bad entries.
2705 if (!CandidateGCCInstallPaths.insert(std::string(LI->path())).second)
2706 continue; // Saw this path before; no need to look at it again.
2707 if (CandidateVersion.isOlderThan(4, 1, 1))
2708 continue;
2709 if (CandidateVersion <= Version)
2710 continue;
2711
2712 if (!ScanGCCForMultilibs(TargetTriple, Args, LI->path(),
2713 NeedsBiarchSuffix))
2714 continue;
2715
2716 Version = CandidateVersion;
2717 GCCTriple.setTriple(CandidateTriple);
2718 // FIXME: We hack together the directory name here instead of
2719 // using LI to ensure stable path separators across Windows and
2720 // Linux.
2721 GCCInstallPath = (LibDir + "/" + LibSuffix + "/" + VersionText).str();
2722 GCCParentLibPath = (GCCInstallPath + "/../" + Suffix.ReversePath).str();
2723 IsValid = true;
2724 }
2725 }
2726 }
2727
ScanGentooConfigs(const llvm::Triple & TargetTriple,const ArgList & Args,const SmallVectorImpl<StringRef> & CandidateTriples,const SmallVectorImpl<StringRef> & CandidateBiarchTriples)2728 bool Generic_GCC::GCCInstallationDetector::ScanGentooConfigs(
2729 const llvm::Triple &TargetTriple, const ArgList &Args,
2730 const SmallVectorImpl<StringRef> &CandidateTriples,
2731 const SmallVectorImpl<StringRef> &CandidateBiarchTriples) {
2732 if (!D.getVFS().exists(concat(D.SysRoot, GentooConfigDir)))
2733 return false;
2734
2735 for (StringRef CandidateTriple : CandidateTriples) {
2736 if (ScanGentooGccConfig(TargetTriple, Args, CandidateTriple))
2737 return true;
2738 }
2739
2740 for (StringRef CandidateTriple : CandidateBiarchTriples) {
2741 if (ScanGentooGccConfig(TargetTriple, Args, CandidateTriple, true))
2742 return true;
2743 }
2744 return false;
2745 }
2746
ScanGentooGccConfig(const llvm::Triple & TargetTriple,const ArgList & Args,StringRef CandidateTriple,bool NeedsBiarchSuffix)2747 bool Generic_GCC::GCCInstallationDetector::ScanGentooGccConfig(
2748 const llvm::Triple &TargetTriple, const ArgList &Args,
2749 StringRef CandidateTriple, bool NeedsBiarchSuffix) {
2750 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> File =
2751 D.getVFS().getBufferForFile(concat(D.SysRoot, GentooConfigDir,
2752 "/config-" + CandidateTriple.str()));
2753 if (File) {
2754 SmallVector<StringRef, 2> Lines;
2755 File.get()->getBuffer().split(Lines, "\n");
2756 for (StringRef Line : Lines) {
2757 Line = Line.trim();
2758 // CURRENT=triple-version
2759 if (!Line.consume_front("CURRENT="))
2760 continue;
2761 // Process the config file pointed to by CURRENT.
2762 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> ConfigFile =
2763 D.getVFS().getBufferForFile(
2764 concat(D.SysRoot, GentooConfigDir, "/" + Line));
2765 std::pair<StringRef, StringRef> ActiveVersion = Line.rsplit('-');
2766 // List of paths to scan for libraries.
2767 SmallVector<StringRef, 4> GentooScanPaths;
2768 // Scan the Config file to find installed GCC libraries path.
2769 // Typical content of the GCC config file:
2770 // LDPATH="/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.x:/usr/lib/gcc/
2771 // (continued from previous line) x86_64-pc-linux-gnu/4.9.x/32"
2772 // MANPATH="/usr/share/gcc-data/x86_64-pc-linux-gnu/4.9.x/man"
2773 // INFOPATH="/usr/share/gcc-data/x86_64-pc-linux-gnu/4.9.x/info"
2774 // STDCXX_INCDIR="/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.x/include/g++-v4"
2775 // We are looking for the paths listed in LDPATH=... .
2776 if (ConfigFile) {
2777 SmallVector<StringRef, 2> ConfigLines;
2778 ConfigFile.get()->getBuffer().split(ConfigLines, "\n");
2779 for (StringRef ConfLine : ConfigLines) {
2780 ConfLine = ConfLine.trim();
2781 if (ConfLine.consume_front("LDPATH=")) {
2782 // Drop '"' from front and back if present.
2783 ConfLine.consume_back("\"");
2784 ConfLine.consume_front("\"");
2785 // Get all paths sperated by ':'
2786 ConfLine.split(GentooScanPaths, ':', -1, /*AllowEmpty*/ false);
2787 }
2788 }
2789 }
2790 // Test the path based on the version in /etc/env.d/gcc/config-{tuple}.
2791 std::string basePath = "/usr/lib/gcc/" + ActiveVersion.first.str() + "/"
2792 + ActiveVersion.second.str();
2793 GentooScanPaths.push_back(StringRef(basePath));
2794
2795 // Scan all paths for GCC libraries.
2796 for (const auto &GentooScanPath : GentooScanPaths) {
2797 std::string GentooPath = concat(D.SysRoot, GentooScanPath);
2798 if (D.getVFS().exists(GentooPath + "/crtbegin.o")) {
2799 if (!ScanGCCForMultilibs(TargetTriple, Args, GentooPath,
2800 NeedsBiarchSuffix))
2801 continue;
2802
2803 Version = GCCVersion::Parse(ActiveVersion.second);
2804 GCCInstallPath = GentooPath;
2805 GCCParentLibPath = GentooPath + std::string("/../../..");
2806 GCCTriple.setTriple(ActiveVersion.first);
2807 IsValid = true;
2808 return true;
2809 }
2810 }
2811 }
2812 }
2813
2814 return false;
2815 }
2816
Generic_GCC(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)2817 Generic_GCC::Generic_GCC(const Driver &D, const llvm::Triple &Triple,
2818 const ArgList &Args)
2819 : ToolChain(D, Triple, Args), GCCInstallation(D),
2820 CudaInstallation(D, Triple, Args), RocmInstallation(D, Triple, Args) {
2821 getProgramPaths().push_back(getDriver().getInstalledDir());
2822 if (getDriver().getInstalledDir() != getDriver().Dir)
2823 getProgramPaths().push_back(getDriver().Dir);
2824 }
2825
~Generic_GCC()2826 Generic_GCC::~Generic_GCC() {}
2827
getTool(Action::ActionClass AC) const2828 Tool *Generic_GCC::getTool(Action::ActionClass AC) const {
2829 switch (AC) {
2830 case Action::PreprocessJobClass:
2831 if (!Preprocess)
2832 Preprocess.reset(new clang::driver::tools::gcc::Preprocessor(*this));
2833 return Preprocess.get();
2834 case Action::CompileJobClass:
2835 if (!Compile)
2836 Compile.reset(new tools::gcc::Compiler(*this));
2837 return Compile.get();
2838 default:
2839 return ToolChain::getTool(AC);
2840 }
2841 }
2842
buildAssembler() const2843 Tool *Generic_GCC::buildAssembler() const {
2844 return new tools::gnutools::Assembler(*this);
2845 }
2846
buildLinker() const2847 Tool *Generic_GCC::buildLinker() const { return new tools::gcc::Linker(*this); }
2848
printVerboseInfo(raw_ostream & OS) const2849 void Generic_GCC::printVerboseInfo(raw_ostream &OS) const {
2850 // Print the information about how we detected the GCC installation.
2851 GCCInstallation.print(OS);
2852 CudaInstallation.print(OS);
2853 RocmInstallation.print(OS);
2854 }
2855
2856 ToolChain::UnwindTableLevel
getDefaultUnwindTableLevel(const ArgList & Args) const2857 Generic_GCC::getDefaultUnwindTableLevel(const ArgList &Args) const {
2858 switch (getArch()) {
2859 case llvm::Triple::aarch64:
2860 case llvm::Triple::ppc:
2861 case llvm::Triple::ppcle:
2862 case llvm::Triple::ppc64:
2863 case llvm::Triple::ppc64le:
2864 case llvm::Triple::x86:
2865 case llvm::Triple::x86_64:
2866 return UnwindTableLevel::Asynchronous;
2867 default:
2868 return UnwindTableLevel::None;
2869 }
2870 }
2871
isPICDefault() const2872 bool Generic_GCC::isPICDefault() const {
2873 switch (getArch()) {
2874 case llvm::Triple::x86_64:
2875 return getTriple().isOSWindows();
2876 case llvm::Triple::mips64:
2877 case llvm::Triple::mips64el:
2878 return true;
2879 default:
2880 return false;
2881 }
2882 }
2883
isPIEDefault(const llvm::opt::ArgList & Args) const2884 bool Generic_GCC::isPIEDefault(const llvm::opt::ArgList &Args) const {
2885 return false;
2886 }
2887
isPICDefaultForced() const2888 bool Generic_GCC::isPICDefaultForced() const {
2889 return getArch() == llvm::Triple::x86_64 && getTriple().isOSWindows();
2890 }
2891
IsIntegratedAssemblerDefault() const2892 bool Generic_GCC::IsIntegratedAssemblerDefault() const {
2893 switch (getTriple().getArch()) {
2894 case llvm::Triple::aarch64:
2895 case llvm::Triple::aarch64_be:
2896 case llvm::Triple::amdgcn:
2897 case llvm::Triple::arm:
2898 case llvm::Triple::armeb:
2899 case llvm::Triple::avr:
2900 case llvm::Triple::bpfel:
2901 case llvm::Triple::bpfeb:
2902 case llvm::Triple::csky:
2903 case llvm::Triple::hexagon:
2904 case llvm::Triple::lanai:
2905 case llvm::Triple::loongarch32:
2906 case llvm::Triple::loongarch64:
2907 case llvm::Triple::m68k:
2908 case llvm::Triple::mips:
2909 case llvm::Triple::mipsel:
2910 case llvm::Triple::mips64:
2911 case llvm::Triple::mips64el:
2912 case llvm::Triple::msp430:
2913 case llvm::Triple::ppc:
2914 case llvm::Triple::ppcle:
2915 case llvm::Triple::ppc64:
2916 case llvm::Triple::ppc64le:
2917 case llvm::Triple::r600:
2918 case llvm::Triple::riscv32:
2919 case llvm::Triple::riscv64:
2920 case llvm::Triple::sparc:
2921 case llvm::Triple::sparcel:
2922 case llvm::Triple::sparcv9:
2923 case llvm::Triple::systemz:
2924 case llvm::Triple::thumb:
2925 case llvm::Triple::thumbeb:
2926 case llvm::Triple::ve:
2927 case llvm::Triple::x86:
2928 case llvm::Triple::x86_64:
2929 return true;
2930 default:
2931 return false;
2932 }
2933 }
2934
PushPPaths(ToolChain::path_list & PPaths)2935 void Generic_GCC::PushPPaths(ToolChain::path_list &PPaths) {
2936 // Cross-compiling binutils and GCC installations (vanilla and openSUSE at
2937 // least) put various tools in a triple-prefixed directory off of the parent
2938 // of the GCC installation. We use the GCC triple here to ensure that we end
2939 // up with tools that support the same amount of cross compiling as the
2940 // detected GCC installation. For example, if we find a GCC installation
2941 // targeting x86_64, but it is a bi-arch GCC installation, it can also be
2942 // used to target i386.
2943 if (GCCInstallation.isValid()) {
2944 PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
2945 GCCInstallation.getTriple().str() + "/bin")
2946 .str());
2947 }
2948 }
2949
AddMultilibPaths(const Driver & D,const std::string & SysRoot,const std::string & OSLibDir,const std::string & MultiarchTriple,path_list & Paths)2950 void Generic_GCC::AddMultilibPaths(const Driver &D,
2951 const std::string &SysRoot,
2952 const std::string &OSLibDir,
2953 const std::string &MultiarchTriple,
2954 path_list &Paths) {
2955 // Add the multilib suffixed paths where they are available.
2956 if (GCCInstallation.isValid()) {
2957 const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
2958 const std::string &LibPath =
2959 std::string(GCCInstallation.getParentLibPath());
2960
2961 // Sourcery CodeBench MIPS toolchain holds some libraries under
2962 // a biarch-like suffix of the GCC installation.
2963 if (const auto &PathsCallback = Multilibs.filePathsCallback())
2964 for (const auto &Path : PathsCallback(SelectedMultilib))
2965 addPathIfExists(D, GCCInstallation.getInstallPath() + Path, Paths);
2966
2967 // Add lib/gcc/$triple/$version, with an optional /multilib suffix.
2968 addPathIfExists(
2969 D, GCCInstallation.getInstallPath() + SelectedMultilib.gccSuffix(),
2970 Paths);
2971
2972 // Add lib/gcc/$triple/$libdir
2973 // For GCC built with --enable-version-specific-runtime-libs.
2974 addPathIfExists(D, GCCInstallation.getInstallPath() + "/../" + OSLibDir,
2975 Paths);
2976
2977 // GCC cross compiling toolchains will install target libraries which ship
2978 // as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
2979 // any part of the GCC installation in
2980 // <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
2981 // debatable, but is the reality today. We need to search this tree even
2982 // when we have a sysroot somewhere else. It is the responsibility of
2983 // whomever is doing the cross build targeting a sysroot using a GCC
2984 // installation that is *not* within the system root to ensure two things:
2985 //
2986 // 1) Any DSOs that are linked in from this tree or from the install path
2987 // above must be present on the system root and found via an
2988 // appropriate rpath.
2989 // 2) There must not be libraries installed into
2990 // <prefix>/<triple>/<libdir> unless they should be preferred over
2991 // those within the system root.
2992 //
2993 // Note that this matches the GCC behavior. See the below comment for where
2994 // Clang diverges from GCC's behavior.
2995 addPathIfExists(D,
2996 LibPath + "/../" + GCCTriple.str() + "/lib/../" + OSLibDir +
2997 SelectedMultilib.osSuffix(),
2998 Paths);
2999
3000 // If the GCC installation we found is inside of the sysroot, we want to
3001 // prefer libraries installed in the parent prefix of the GCC installation.
3002 // It is important to *not* use these paths when the GCC installation is
3003 // outside of the system root as that can pick up unintended libraries.
3004 // This usually happens when there is an external cross compiler on the
3005 // host system, and a more minimal sysroot available that is the target of
3006 // the cross. Note that GCC does include some of these directories in some
3007 // configurations but this seems somewhere between questionable and simply
3008 // a bug.
3009 if (StringRef(LibPath).startswith(SysRoot))
3010 addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
3011 }
3012 }
3013
AddMultiarchPaths(const Driver & D,const std::string & SysRoot,const std::string & OSLibDir,path_list & Paths)3014 void Generic_GCC::AddMultiarchPaths(const Driver &D,
3015 const std::string &SysRoot,
3016 const std::string &OSLibDir,
3017 path_list &Paths) {
3018 if (GCCInstallation.isValid()) {
3019 const std::string &LibPath =
3020 std::string(GCCInstallation.getParentLibPath());
3021 const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
3022 const Multilib &Multilib = GCCInstallation.getMultilib();
3023 addPathIfExists(
3024 D, LibPath + "/../" + GCCTriple.str() + "/lib" + Multilib.osSuffix(),
3025 Paths);
3026 }
3027 }
3028
AddMultilibIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const3029 void Generic_GCC::AddMultilibIncludeArgs(const ArgList &DriverArgs,
3030 ArgStringList &CC1Args) const {
3031 // Add include directories specific to the selected multilib set and multilib.
3032 if (!GCCInstallation.isValid())
3033 return;
3034 // gcc TOOL_INCLUDE_DIR.
3035 const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
3036 std::string LibPath(GCCInstallation.getParentLibPath());
3037 addSystemInclude(DriverArgs, CC1Args,
3038 Twine(LibPath) + "/../" + GCCTriple.str() + "/include");
3039
3040 const auto &Callback = Multilibs.includeDirsCallback();
3041 if (Callback) {
3042 for (const auto &Path : Callback(GCCInstallation.getMultilib()))
3043 addExternCSystemIncludeIfExists(DriverArgs, CC1Args,
3044 GCCInstallation.getInstallPath() + Path);
3045 }
3046 }
3047
AddClangCXXStdlibIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const3048 void Generic_GCC::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
3049 ArgStringList &CC1Args) const {
3050 if (DriverArgs.hasArg(options::OPT_nostdinc, options::OPT_nostdincxx,
3051 options::OPT_nostdlibinc))
3052 return;
3053
3054 switch (GetCXXStdlibType(DriverArgs)) {
3055 case ToolChain::CST_Libcxx:
3056 addLibCxxIncludePaths(DriverArgs, CC1Args);
3057 break;
3058
3059 case ToolChain::CST_Libstdcxx:
3060 addLibStdCxxIncludePaths(DriverArgs, CC1Args);
3061 break;
3062 }
3063 }
3064
3065 void
addLibCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const3066 Generic_GCC::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
3067 llvm::opt::ArgStringList &CC1Args) const {
3068 const Driver &D = getDriver();
3069 std::string SysRoot = computeSysRoot();
3070 std::string Target = getTripleString();
3071
3072 auto AddIncludePath = [&](std::string Path) {
3073 std::string Version = detectLibcxxVersion(Path);
3074 if (Version.empty())
3075 return false;
3076
3077 // First add the per-target include path if it exists.
3078 std::string TargetDir = Path + "/" + Target + "/c++/" + Version;
3079 if (D.getVFS().exists(TargetDir))
3080 addSystemInclude(DriverArgs, CC1Args, TargetDir);
3081
3082 // Second add the generic one.
3083 addSystemInclude(DriverArgs, CC1Args, Path + "/c++/" + Version);
3084 return true;
3085 };
3086
3087 // Android never uses the libc++ headers installed alongside the toolchain,
3088 // which are generally incompatible with the NDK libraries anyway.
3089 if (!getTriple().isAndroid())
3090 if (AddIncludePath(getDriver().Dir + "/../include"))
3091 return;
3092 // If this is a development, non-installed, clang, libcxx will
3093 // not be found at ../include/c++ but it likely to be found at
3094 // one of the following two locations:
3095 if (AddIncludePath(concat(SysRoot, "/usr/local/include")))
3096 return;
3097 if (AddIncludePath(concat(SysRoot, "/usr/include")))
3098 return;
3099 }
3100
addLibStdCXXIncludePaths(Twine IncludeDir,StringRef Triple,Twine IncludeSuffix,const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args,bool DetectDebian) const3101 bool Generic_GCC::addLibStdCXXIncludePaths(Twine IncludeDir, StringRef Triple,
3102 Twine IncludeSuffix,
3103 const llvm::opt::ArgList &DriverArgs,
3104 llvm::opt::ArgStringList &CC1Args,
3105 bool DetectDebian) const {
3106 if (!getVFS().exists(IncludeDir))
3107 return false;
3108
3109 // Debian native gcc uses g++-multiarch-incdir.diff which uses
3110 // include/x86_64-linux-gnu/c++/10$IncludeSuffix instead of
3111 // include/c++/10/x86_64-linux-gnu$IncludeSuffix.
3112 std::string Dir = IncludeDir.str();
3113 StringRef Include =
3114 llvm::sys::path::parent_path(llvm::sys::path::parent_path(Dir));
3115 std::string Path =
3116 (Include + "/" + Triple + Dir.substr(Include.size()) + IncludeSuffix)
3117 .str();
3118 if (DetectDebian && !getVFS().exists(Path))
3119 return false;
3120
3121 // GPLUSPLUS_INCLUDE_DIR
3122 addSystemInclude(DriverArgs, CC1Args, IncludeDir);
3123 // GPLUSPLUS_TOOL_INCLUDE_DIR. If Triple is not empty, add a target-dependent
3124 // include directory.
3125 if (DetectDebian)
3126 addSystemInclude(DriverArgs, CC1Args, Path);
3127 else if (!Triple.empty())
3128 addSystemInclude(DriverArgs, CC1Args,
3129 IncludeDir + "/" + Triple + IncludeSuffix);
3130 // GPLUSPLUS_BACKWARD_INCLUDE_DIR
3131 addSystemInclude(DriverArgs, CC1Args, IncludeDir + "/backward");
3132 return true;
3133 }
3134
addGCCLibStdCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args,StringRef DebianMultiarch) const3135 bool Generic_GCC::addGCCLibStdCxxIncludePaths(
3136 const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
3137 StringRef DebianMultiarch) const {
3138 assert(GCCInstallation.isValid());
3139
3140 // By default, look for the C++ headers in an include directory adjacent to
3141 // the lib directory of the GCC installation. Note that this is expect to be
3142 // equivalent to '/usr/include/c++/X.Y' in almost all cases.
3143 StringRef LibDir = GCCInstallation.getParentLibPath();
3144 StringRef InstallDir = GCCInstallation.getInstallPath();
3145 StringRef TripleStr = GCCInstallation.getTriple().str();
3146 const Multilib &Multilib = GCCInstallation.getMultilib();
3147 const GCCVersion &Version = GCCInstallation.getVersion();
3148
3149 // Try /../$triple/include/c++/$version (gcc --print-multiarch is not empty).
3150 if (addLibStdCXXIncludePaths(
3151 LibDir.str() + "/../" + TripleStr + "/include/c++/" + Version.Text,
3152 TripleStr, Multilib.includeSuffix(), DriverArgs, CC1Args))
3153 return true;
3154
3155 // Try /gcc/$triple/$version/include/c++/ (gcc --print-multiarch is not
3156 // empty). Like above but for GCC built with
3157 // --enable-version-specific-runtime-libs.
3158 if (addLibStdCXXIncludePaths(LibDir.str() + "/gcc/" + TripleStr + "/" +
3159 Version.Text + "/include/c++/",
3160 TripleStr, Multilib.includeSuffix(), DriverArgs,
3161 CC1Args))
3162 return true;
3163
3164 // Detect Debian g++-multiarch-incdir.diff.
3165 if (addLibStdCXXIncludePaths(LibDir.str() + "/../include/c++/" + Version.Text,
3166 DebianMultiarch, Multilib.includeSuffix(),
3167 DriverArgs, CC1Args, /*Debian=*/true))
3168 return true;
3169
3170 // Try /../include/c++/$version (gcc --print-multiarch is empty).
3171 if (addLibStdCXXIncludePaths(LibDir.str() + "/../include/c++/" + Version.Text,
3172 TripleStr, Multilib.includeSuffix(), DriverArgs,
3173 CC1Args))
3174 return true;
3175
3176 // Otherwise, fall back on a bunch of options which don't use multiarch
3177 // layouts for simplicity.
3178 const std::string LibStdCXXIncludePathCandidates[] = {
3179 // Gentoo is weird and places its headers inside the GCC install,
3180 // so if the first attempt to find the headers fails, try these patterns.
3181 InstallDir.str() + "/include/g++-v" + Version.Text,
3182 InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." +
3183 Version.MinorStr,
3184 InstallDir.str() + "/include/g++-v" + Version.MajorStr,
3185 };
3186
3187 for (const auto &IncludePath : LibStdCXXIncludePathCandidates) {
3188 if (addLibStdCXXIncludePaths(IncludePath, TripleStr,
3189 Multilib.includeSuffix(), DriverArgs, CC1Args))
3190 return true;
3191 }
3192 return false;
3193 }
3194
3195 void
addLibStdCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const3196 Generic_GCC::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
3197 llvm::opt::ArgStringList &CC1Args) const {
3198 if (GCCInstallation.isValid()) {
3199 addGCCLibStdCxxIncludePaths(DriverArgs, CC1Args,
3200 GCCInstallation.getTriple().str());
3201 }
3202 }
3203
3204 llvm::opt::DerivedArgList *
TranslateArgs(const llvm::opt::DerivedArgList & Args,StringRef,Action::OffloadKind DeviceOffloadKind) const3205 Generic_GCC::TranslateArgs(const llvm::opt::DerivedArgList &Args, StringRef,
3206 Action::OffloadKind DeviceOffloadKind) const {
3207
3208 // If this tool chain is used for an OpenMP offloading device we have to make
3209 // sure we always generate a shared library regardless of the commands the
3210 // user passed to the host. This is required because the runtime library
3211 // is required to load the device image dynamically at run time.
3212 if (DeviceOffloadKind == Action::OFK_OpenMP) {
3213 DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs());
3214 const OptTable &Opts = getDriver().getOpts();
3215
3216 // Request the shared library. Given that these options are decided
3217 // implicitly, they do not refer to any base argument.
3218 DAL->AddFlagArg(/*BaseArg=*/nullptr, Opts.getOption(options::OPT_shared));
3219 DAL->AddFlagArg(/*BaseArg=*/nullptr, Opts.getOption(options::OPT_fPIC));
3220
3221 // Filter all the arguments we don't care passing to the offloading
3222 // toolchain as they can mess up with the creation of a shared library.
3223 for (auto *A : Args) {
3224 switch ((options::ID)A->getOption().getID()) {
3225 default:
3226 DAL->append(A);
3227 break;
3228 case options::OPT_shared:
3229 case options::OPT_dynamic:
3230 case options::OPT_static:
3231 case options::OPT_fPIC:
3232 case options::OPT_fno_PIC:
3233 case options::OPT_fpic:
3234 case options::OPT_fno_pic:
3235 case options::OPT_fPIE:
3236 case options::OPT_fno_PIE:
3237 case options::OPT_fpie:
3238 case options::OPT_fno_pie:
3239 break;
3240 }
3241 }
3242 return DAL;
3243 }
3244 return nullptr;
3245 }
3246
anchor()3247 void Generic_ELF::anchor() {}
3248
addClangTargetOptions(const ArgList & DriverArgs,ArgStringList & CC1Args,Action::OffloadKind) const3249 void Generic_ELF::addClangTargetOptions(const ArgList &DriverArgs,
3250 ArgStringList &CC1Args,
3251 Action::OffloadKind) const {
3252 if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
3253 options::OPT_fno_use_init_array, true))
3254 CC1Args.push_back("-fno-use-init-array");
3255 }
3256