clang/lib/Driver/ToolChains/NetBSD.cpp

   1 //===--- NetBSD.cpp - NetBSD 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 "NetBSD.h"
  10 #include "Arch/ARM.h"
  11 #include "Arch/Mips.h"
  12 #include "Arch/Sparc.h"
  13 #include "CommonArgs.h"
  14 #include "clang/Config/config.h"
  15 #include "clang/Driver/Compilation.h"
  16 #include "clang/Driver/Driver.h"
  17 #include "clang/Driver/Options.h"
  18 #include "clang/Driver/SanitizerArgs.h"
  19 #include "llvm/Option/ArgList.h"
  20 #include "llvm/Support/VirtualFileSystem.h"
  21
  22 using namespace clang::driver;
  23 using namespace clang::driver::tools;
  24 using namespace clang::driver::toolchains;
  25 using namespace clang;
  26 using namespace llvm::opt;
  27
  28 void netbsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
  29                                      const InputInfo &Output,
  30                                      const InputInfoList &Inputs,
  31                                      const ArgList &Args,
  32                                      const char *LinkingOutput) const {
  33   const auto &ToolChain = static_cast<const NetBSD &>(getToolChain());
  34   const Driver &D = ToolChain.getDriver();
  35   const llvm::Triple &Triple = ToolChain.getTriple();
  36   ArgStringList CmdArgs;
  37
  38   claimNoWarnArgs(Args);
  39
  40   // GNU as needs different flags for creating the correct output format
  41   // on architectures with different ABIs or optional feature sets.
  42   switch (ToolChain.getArch()) {
  43   case llvm::Triple::x86:
  44     CmdArgs.push_back("--32");
  45     break;
  46   case llvm::Triple::arm:
  47   case llvm::Triple::armeb:
  48   case llvm::Triple::thumb:
  49   case llvm::Triple::thumbeb: {
  50     StringRef MArch, MCPU;
  51     arm::getARMArchCPUFromArgs(Args, MArch, MCPU, /*FromAs*/ true);
  52     std::string Arch = arm::getARMTargetCPU(MCPU, MArch, Triple);
  53     CmdArgs.push_back(Args.MakeArgString("-mcpu=" + Arch));
  54     break;
  55   }
  56
  57   case llvm::Triple::mips:
  58   case llvm::Triple::mipsel:
  59   case llvm::Triple::mips64:
  60   case llvm::Triple::mips64el: {
  61     StringRef CPUName;
  62     StringRef ABIName;
  63     mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
  64
  65     CmdArgs.push_back("-march");
  66     CmdArgs.push_back(CPUName.data());
  67
  68     CmdArgs.push_back("-mabi");
  69     CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());
  70
  71     if (Triple.isLittleEndian())
  72       CmdArgs.push_back("-EL");
  73     else
  74       CmdArgs.push_back("-EB");
  75
  76     AddAssemblerKPIC(ToolChain, Args, CmdArgs);
  77     break;
  78   }
  79
  80   case llvm::Triple::sparc: {
  81     CmdArgs.push_back("-32");
  82     std::string CPU = getCPUName(D, Args, Triple);
  83     CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple));
  84     AddAssemblerKPIC(ToolChain, Args, CmdArgs);
  85     break;
  86   }
  87
  88   case llvm::Triple::sparcv9: {
  89     CmdArgs.push_back("-64");
  90     std::string CPU = getCPUName(D, Args, Triple);
  91     CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple));
  92     AddAssemblerKPIC(ToolChain, Args, CmdArgs);
  93     break;
  94   }
  95
  96   default:
  97     break;
  98   }
  99
 100   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
 101
 102   CmdArgs.push_back("-o");
 103   CmdArgs.push_back(Output.getFilename());
 104
 105   for (const auto &II : Inputs)
 106     CmdArgs.push_back(II.getFilename());
 107
 108   const char *Exec = Args.MakeArgString((ToolChain.GetProgramPath("as")));
 109   C.addCommand(std::make_unique<Command>(JA, *this,
 110                                          ResponseFileSupport::AtFileCurCP(),
 111                                          Exec, CmdArgs, Inputs, Output));
 112 }
 113
 114 void netbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 115                                   const InputInfo &Output,
 116                                   const InputInfoList &Inputs,
 117                                   const ArgList &Args,
 118                                   const char *LinkingOutput) const {
 119   const auto &ToolChain = static_cast<const NetBSD &>(getToolChain());
 120   const Driver &D = ToolChain.getDriver();
 121   const llvm::Triple &Triple = ToolChain.getTriple();
 122   const llvm::Triple::ArchType Arch = ToolChain.getArch();
 123   const bool Static = Args.hasArg(options::OPT_static);
 124   const bool Shared = Args.hasArg(options::OPT_shared);
 125   const bool Pie = Args.hasArg(options::OPT_pie);
 126   ArgStringList CmdArgs;
 127
 128   if (!D.SysRoot.empty())
 129     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
 130
 131   CmdArgs.push_back("--eh-frame-hdr");
 132   if (Static) {
 133     CmdArgs.push_back("-Bstatic");
 134     if (Pie) {
 135       Args.AddAllArgs(CmdArgs, options::OPT_pie);
 136       CmdArgs.push_back("--no-dynamic-linker");
 137     }
 138   } else {
 139     if (Args.hasArg(options::OPT_rdynamic))
 140       CmdArgs.push_back("-export-dynamic");
 141     if (Shared) {
 142       CmdArgs.push_back("-shared");
 143     } else if (!Args.hasArg(options::OPT_r)) {
 144       Args.AddAllArgs(CmdArgs, options::OPT_pie);
 145       CmdArgs.push_back("-dynamic-linker");
 146       CmdArgs.push_back("/libexec/ld.elf_so");
 147     }
 148   }
 149
 150   // Many NetBSD architectures support more than one ABI.
 151   // Determine the correct emulation for ld.
 152   switch (Arch) {
 153   case llvm::Triple::x86:
 154     CmdArgs.push_back("-m");
 155     CmdArgs.push_back("elf_i386");
 156     break;
 157   case llvm::Triple::arm:
 158   case llvm::Triple::thumb:
 159     CmdArgs.push_back("-m");
 160     switch (Triple.getEnvironment()) {
 161     case llvm::Triple::EABI:
 162     case llvm::Triple::GNUEABI:
 163       CmdArgs.push_back("armelf_nbsd_eabi");
 164       break;
 165     case llvm::Triple::EABIHF:
 166     case llvm::Triple::GNUEABIHF:
 167       CmdArgs.push_back("armelf_nbsd_eabihf");
 168       break;
 169     default:
 170       CmdArgs.push_back("armelf_nbsd");
 171       break;
 172     }
 173     break;
 174   case llvm::Triple::armeb:
 175   case llvm::Triple::thumbeb:
 176     arm::appendBE8LinkFlag(Args, CmdArgs, ToolChain.getEffectiveTriple());
 177     CmdArgs.push_back("-m");
 178     switch (Triple.getEnvironment()) {
 179     case llvm::Triple::EABI:
 180     case llvm::Triple::GNUEABI:
 181       CmdArgs.push_back("armelfb_nbsd_eabi");
 182       break;
 183     case llvm::Triple::EABIHF:
 184     case llvm::Triple::GNUEABIHF:
 185       CmdArgs.push_back("armelfb_nbsd_eabihf");
 186       break;
 187     default:
 188       CmdArgs.push_back("armelfb_nbsd");
 189       break;
 190     }
 191     break;
 192   case llvm::Triple::mips64:
 193   case llvm::Triple::mips64el:
 194     if (mips::hasMipsAbiArg(Args, "32")) {
 195       CmdArgs.push_back("-m");
 196       if (Arch == llvm::Triple::mips64)
 197         CmdArgs.push_back("elf32btsmip");
 198       else
 199         CmdArgs.push_back("elf32ltsmip");
 200     } else if (mips::hasMipsAbiArg(Args, "64")) {
 201       CmdArgs.push_back("-m");
 202       if (Arch == llvm::Triple::mips64)
 203         CmdArgs.push_back("elf64btsmip");
 204       else
 205         CmdArgs.push_back("elf64ltsmip");
 206     }
 207     break;
 208   case llvm::Triple::ppc:
 209     CmdArgs.push_back("-m");
 210     CmdArgs.push_back("elf32ppc_nbsd");
 211     break;
 212
 213   case llvm::Triple::ppc64:
 214   case llvm::Triple::ppc64le:
 215     CmdArgs.push_back("-m");
 216     CmdArgs.push_back("elf64ppc");
 217     break;
 218
 219   case llvm::Triple::riscv32:
 220     CmdArgs.push_back("-m");
 221     CmdArgs.push_back("elf32lriscv");
 222     break;
 223
 224   case llvm::Triple::riscv64:
 225     CmdArgs.push_back("-m");
 226     CmdArgs.push_back("elf64lriscv");
 227     break;
 228
 229   case llvm::Triple::sparc:
 230     CmdArgs.push_back("-m");
 231     CmdArgs.push_back("elf32_sparc");
 232     break;
 233
 234   case llvm::Triple::sparcv9:
 235     CmdArgs.push_back("-m");
 236     CmdArgs.push_back("elf64_sparc");
 237     break;
 238
 239   default:
 240     break;
 241   }
 242
 243   if (Triple.isRISCV())
 244     CmdArgs.push_back("-X");
 245
 246   assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
 247   if (Output.isFilename()) {
 248     CmdArgs.push_back("-o");
 249     CmdArgs.push_back(Output.getFilename());
 250   }
 251
 252   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
 253                    options::OPT_r)) {
 254     const char *crt0 = nullptr;
 255     const char *crtbegin = nullptr;
 256     if (!Shared)
 257       crt0 = "crt0.o";
 258
 259     if (Shared || Pie)
 260       crtbegin = "crtbeginS.o";
 261     else
 262       crtbegin = "crtbegin.o";
 263
 264     if (crt0)
 265       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt0)));
 266     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
 267     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
 268   }
 269
 270   Args.addAllArgs(CmdArgs, {options::OPT_L, options::OPT_T_Group,
 271                             options::OPT_s, options::OPT_t, options::OPT_r});
 272   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
 273
 274   bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
 275   bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
 276   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 277
 278   const SanitizerArgs &SanArgs = ToolChain.getSanitizerArgs(Args);
 279   if (SanArgs.needsSharedRt()) {
 280     CmdArgs.push_back("-rpath");
 281     CmdArgs.push_back(Args.MakeArgString(ToolChain.getCompilerRTPath()));
 282   }
 283
 284   bool useLibgcc = true;
 285   switch (ToolChain.getArch()) {
 286   case llvm::Triple::aarch64:
 287   case llvm::Triple::aarch64_be:
 288   case llvm::Triple::arm:
 289   case llvm::Triple::armeb:
 290   case llvm::Triple::thumb:
 291   case llvm::Triple::thumbeb:
 292   case llvm::Triple::ppc:
 293   case llvm::Triple::ppc64:
 294   case llvm::Triple::ppc64le:
 295   case llvm::Triple::riscv32:
 296   case llvm::Triple::riscv64:
 297   case llvm::Triple::sparc:
 298   case llvm::Triple::sparcv9:
 299   case llvm::Triple::x86:
 300   case llvm::Triple::x86_64:
 301     useLibgcc = false;
 302     break;
 303   default:
 304     break;
 305   }
 306
 307   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
 308                    options::OPT_r)) {
 309     // Use the static OpenMP runtime with -static-openmp
 310     bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) && !Static;
 311     addOpenMPRuntime(CmdArgs, ToolChain, Args, StaticOpenMP);
 312
 313     if (D.CCCIsCXX()) {
 314       if (ToolChain.ShouldLinkCXXStdlib(Args))
 315         ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
 316       CmdArgs.push_back("-lm");
 317     }
 318
 319     // Silence warnings when linking C code with a C++ '-stdlib' argument.
 320     Args.ClaimAllArgs(options::OPT_stdlib_EQ);
 321
 322     // Additional linker set-up and flags for Fortran. This is required in order
 323     // to generate executables. As Fortran runtime depends on the C runtime,
 324     // these dependencies need to be listed before the C runtime below (i.e.
 325     // AddRunTimeLibs).
 326     if (D.IsFlangMode()) {
 327       addFortranRuntimeLibraryPath(ToolChain, Args, CmdArgs);
 328       addFortranRuntimeLibs(ToolChain, Args, CmdArgs);
 329       CmdArgs.push_back("-lm");
 330     }
 331
 332     if (NeedsSanitizerDeps)
 333       linkSanitizerRuntimeDeps(ToolChain, Args, CmdArgs);
 334     if (NeedsXRayDeps)
 335       linkXRayRuntimeDeps(ToolChain, Args, CmdArgs);
 336     if (Args.hasArg(options::OPT_pthread))
 337       CmdArgs.push_back("-lpthread");
 338     CmdArgs.push_back("-lc");
 339
 340     if (useLibgcc) {
 341       if (Static) {
 342         // libgcc_eh depends on libc, so resolve as much as possible,
 343         // pull in any new requirements from libc and then get the rest
 344         // of libgcc.
 345         CmdArgs.push_back("-lgcc_eh");
 346         CmdArgs.push_back("-lc");
 347         CmdArgs.push_back("-lgcc");
 348       } else {
 349         CmdArgs.push_back("-lgcc");
 350         CmdArgs.push_back("--as-needed");
 351         CmdArgs.push_back("-lgcc_s");
 352         CmdArgs.push_back("--no-as-needed");
 353       }
 354     }
 355   }
 356
 357   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
 358                    options::OPT_r)) {
 359     const char *crtend = nullptr;
 360     if (Shared || Pie)
 361       crtend = "crtendS.o";
 362     else
 363       crtend = "crtend.o";
 364
 365     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
 366     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
 367   }
 368
 369   ToolChain.addProfileRTLibs(Args, CmdArgs);
 370
 371   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
 372   C.addCommand(std::make_unique<Command>(JA, *this,
 373                                          ResponseFileSupport::AtFileCurCP(),
 374                                          Exec, CmdArgs, Inputs, Output));
 375 }
 376
 377 /// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
 378
 379 NetBSD::NetBSD(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
 380     : Generic_ELF(D, Triple, Args) {
 381   if (!Args.hasArg(options::OPT_nostdlib)) {
 382     // When targeting a 32-bit platform, try the special directory used on
 383     // 64-bit hosts, and only fall back to the main library directory if that
 384     // doesn't work.
 385     // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
 386     // what all logic is needed to emulate the '=' prefix here.
 387     switch (Triple.getArch()) {
 388     case llvm::Triple::x86:
 389       getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/i386"));
 390       break;
 391     case llvm::Triple::arm:
 392     case llvm::Triple::armeb:
 393     case llvm::Triple::thumb:
 394     case llvm::Triple::thumbeb:
 395       switch (Triple.getEnvironment()) {
 396       case llvm::Triple::EABI:
 397       case llvm::Triple::GNUEABI:
 398         getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/eabi"));
 399         break;
 400       case llvm::Triple::EABIHF:
 401       case llvm::Triple::GNUEABIHF:
 402         getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/eabihf"));
 403         break;
 404       default:
 405         getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/oabi"));
 406         break;
 407       }
 408       break;
 409     case llvm::Triple::mips64:
 410     case llvm::Triple::mips64el:
 411       if (tools::mips::hasMipsAbiArg(Args, "o32"))
 412         getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/o32"));
 413       else if (tools::mips::hasMipsAbiArg(Args, "64"))
 414         getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/64"));
 415       break;
 416     case llvm::Triple::ppc:
 417       getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/powerpc"));
 418       break;
 419     case llvm::Triple::sparc:
 420       getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/sparc"));
 421       break;
 422     default:
 423       break;
 424     }
 425
 426     getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib"));
 427   }
 428 }
 429
 430 Tool *NetBSD::buildAssembler() const {
 431   return new tools::netbsd::Assembler(*this);
 432 }
 433
 434 Tool *NetBSD::buildLinker() const { return new tools::netbsd::Linker(*this); }
 435
 436 ToolChain::CXXStdlibType NetBSD::GetDefaultCXXStdlibType() const {
 437   switch (getArch()) {
 438   case llvm::Triple::aarch64:
 439   case llvm::Triple::aarch64_be:
 440   case llvm::Triple::arm:
 441   case llvm::Triple::armeb:
 442   case llvm::Triple::thumb:
 443   case llvm::Triple::thumbeb:
 444   case llvm::Triple::ppc:
 445   case llvm::Triple::ppc64:
 446   case llvm::Triple::ppc64le:
 447   case llvm::Triple::riscv32:
 448   case llvm::Triple::riscv64:
 449   case llvm::Triple::sparc:
 450   case llvm::Triple::sparcv9:
 451   case llvm::Triple::x86:
 452   case llvm::Triple::x86_64:
 453     return ToolChain::CST_Libcxx;
 454   default:
 455     break;
 456   }
 457   return ToolChain::CST_Libstdcxx;
 458 }
 459
 460 void NetBSD::AddClangSystemIncludeArgs(
 461     const llvm::opt::ArgList &DriverArgs,
 462     llvm::opt::ArgStringList &CC1Args) const {
 463   const Driver &D = getDriver();
 464
 465   if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
 466     return;
 467
 468   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
 469     SmallString<128> Dir(D.ResourceDir);
 470     llvm::sys::path::append(Dir, "include");
 471     addSystemInclude(DriverArgs, CC1Args, Dir.str());
 472   }
 473
 474   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
 475     return;
 476
 477   // Check for configure-time C include directories.
 478   StringRef CIncludeDirs(C_INCLUDE_DIRS);
 479   if (CIncludeDirs != "") {
 480     SmallVector<StringRef, 5> dirs;
 481     CIncludeDirs.split(dirs, ":");
 482     for (StringRef dir : dirs) {
 483       StringRef Prefix =
 484           llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
 485       addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
 486     }
 487     return;
 488   }
 489
 490   addExternCSystemInclude(DriverArgs, CC1Args,
 491                           concat(D.SysRoot, "/usr/include"));
 492 }
 493
 494 void NetBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
 495                                    llvm::opt::ArgStringList &CC1Args) const {
 496   const std::string Candidates[] = {
 497     // directory relative to build tree
 498     concat(getDriver().Dir, "/../include/c++/v1"),
 499     // system install with full upstream path
 500     concat(getDriver().SysRoot, "/usr/include/c++/v1"),
 501     // system install from src
 502     concat(getDriver().SysRoot, "/usr/include/c++"),
 503   };
 504
 505   for (const auto &IncludePath : Candidates) {
 506     if (!getVFS().exists(IncludePath + "/__config"))
 507       continue;
 508
 509     // Use the first candidate that looks valid.
 510     addSystemInclude(DriverArgs, CC1Args, IncludePath);
 511     return;
 512   }
 513 }
 514
 515 void NetBSD::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
 516                                       llvm::opt::ArgStringList &CC1Args) const {
 517   addLibStdCXXIncludePaths(concat(getDriver().SysRoot, "/usr/include/g++"), "", "",
 518                            DriverArgs, CC1Args);
 519 }
 520
 521 llvm::ExceptionHandling NetBSD::GetExceptionModel(const ArgList &Args) const {
 522   // NetBSD uses Dwarf exceptions on ARM.
 523   llvm::Triple::ArchType TArch = getTriple().getArch();
 524   if (TArch == llvm::Triple::arm || TArch == llvm::Triple::armeb ||
 525       TArch == llvm::Triple::thumb || TArch == llvm::Triple::thumbeb)
 526     return llvm::ExceptionHandling::DwarfCFI;
 527   return llvm::ExceptionHandling::None;
 528 }
 529
 530 SanitizerMask NetBSD::getSupportedSanitizers() const {
 531   const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
 532   const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
 533   SanitizerMask Res = ToolChain::getSupportedSanitizers();
 534   if (IsX86 || IsX86_64) {
 535     Res |= SanitizerKind::Address;
 536     Res |= SanitizerKind::PointerCompare;
 537     Res |= SanitizerKind::PointerSubtract;
 538     Res |= SanitizerKind::Leak;
 539     Res |= SanitizerKind::SafeStack;
 540     Res |= SanitizerKind::Scudo;
 541     Res |= SanitizerKind::Vptr;
 542   }
 543   if (IsX86_64) {
 544     Res |= SanitizerKind::DataFlow;
 545     Res |= SanitizerKind::Fuzzer;
 546     Res |= SanitizerKind::FuzzerNoLink;
 547     Res |= SanitizerKind::HWAddress;
 548     Res |= SanitizerKind::KernelAddress;
 549     Res |= SanitizerKind::KernelHWAddress;
 550     Res |= SanitizerKind::KernelMemory;
 551     Res |= SanitizerKind::Memory;
 552     Res |= SanitizerKind::Thread;
 553   }
 554   return Res;
 555 }
 556
 557 void NetBSD::addClangTargetOptions(const ArgList &DriverArgs,
 558                                    ArgStringList &CC1Args,
 559                                    Action::OffloadKind) const {
 560   const SanitizerArgs &SanArgs = getSanitizerArgs(DriverArgs);
 561   if (SanArgs.hasAnySanitizer())
 562     CC1Args.push_back("-D_REENTRANT");
 563
 564   VersionTuple OsVersion = getTriple().getOSVersion();
 565   bool UseInitArrayDefault =
 566       OsVersion >= VersionTuple(9) || OsVersion.getMajor() == 0 ||
 567       getTriple().getArch() == llvm::Triple::aarch64 ||
 568       getTriple().getArch() == llvm::Triple::aarch64_be ||
 569       getTriple().getArch() == llvm::Triple::arm ||
 570       getTriple().getArch() == llvm::Triple::armeb ||
 571       getTriple().getArch() == llvm::Triple::riscv32 ||
 572       getTriple().getArch() == llvm::Triple::riscv64;
 573
 574   if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
 575                           options::OPT_fno_use_init_array, UseInitArrayDefault))
 576     CC1Args.push_back("-fno-use-init-array");
 577 }