src/third_party/llvm-project/clang/lib/Driver/ToolChains/FreeBSD.cpp - cobalt - Git at Google

 //===--- FreeBSD.cpp - FreeBSD ToolChain Implementations --------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//

 #include "FreeBSD.h"
 #include "Arch/ARM.h"
 #include "Arch/Mips.h"
 #include "Arch/Sparc.h"
 #include "CommonArgs.h"
 #include "clang/Basic/VirtualFileSystem.h"
 #include "clang/Driver/Compilation.h"
 #include "clang/Driver/Options.h"
 #include "clang/Driver/SanitizerArgs.h"
 #include "llvm/Option/ArgList.h"

 using namespace clang::driver;
 using namespace clang::driver::tools;
 using namespace clang::driver::toolchains;
 using namespace clang;
 using namespace llvm::opt;

 void freebsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
                                       const InputInfo &Output,
                                       const InputInfoList &Inputs,
                                       const ArgList &Args,
                                       const char *LinkingOutput) const {
   claimNoWarnArgs(Args);
   ArgStringList CmdArgs;

   // When building 32-bit code on FreeBSD/amd64, we have to explicitly
   // instruct as in the base system to assemble 32-bit code.
   switch (getToolChain().getArch()) {
   default:
     break;
   case llvm::Triple::x86:
     CmdArgs.push_back("--32");
     break;
   case llvm::Triple::ppc:
     CmdArgs.push_back("-a32");
     break;
   case llvm::Triple::mips:
   case llvm::Triple::mipsel:
   case llvm::Triple::mips64:
   case llvm::Triple::mips64el: {
     StringRef CPUName;
     StringRef ABIName;
     mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName);

     CmdArgs.push_back("-march");
     CmdArgs.push_back(CPUName.data());

     CmdArgs.push_back("-mabi");
     CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());

     if (getToolChain().getTriple().isLittleEndian())
       CmdArgs.push_back("-EL");
     else
       CmdArgs.push_back("-EB");

     if (Arg *A = Args.getLastArg(options::OPT_G)) {
       StringRef v = A->getValue();
       CmdArgs.push_back(Args.MakeArgString("-G" + v));
       A->claim();
     }

     AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
     break;
   }
   case llvm::Triple::arm:
   case llvm::Triple::armeb:
   case llvm::Triple::thumb:
   case llvm::Triple::thumbeb: {
     arm::FloatABI ABI = arm::getARMFloatABI(getToolChain(), Args);

     if (ABI == arm::FloatABI::Hard)
       CmdArgs.push_back("-mfpu=vfp");
     else
       CmdArgs.push_back("-mfpu=softvfp");

     switch (getToolChain().getTriple().getEnvironment()) {
     case llvm::Triple::GNUEABIHF:
     case llvm::Triple::GNUEABI:
     case llvm::Triple::EABI:
       CmdArgs.push_back("-meabi=5");
       break;

     default:
       CmdArgs.push_back("-matpcs");
     }
     break;
   }
   case llvm::Triple::sparc:
   case llvm::Triple::sparcel:
   case llvm::Triple::sparcv9: {
     std::string CPU = getCPUName(Args, getToolChain().getTriple());
     CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
     AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
     break;
   }
   }

   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);

   CmdArgs.push_back("-o");
   CmdArgs.push_back(Output.getFilename());

   for (const auto &II : Inputs)
     CmdArgs.push_back(II.getFilename());

   const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
 }

 void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
                                    const InputInfo &Output,
                                    const InputInfoList &Inputs,
                                    const ArgList &Args,
                                    const char *LinkingOutput) const {
   const toolchains::FreeBSD &ToolChain =
       static_cast<const toolchains::FreeBSD &>(getToolChain());
   const Driver &D = ToolChain.getDriver();
   const llvm::Triple::ArchType Arch = ToolChain.getArch();
   const bool IsPIE =
       !Args.hasArg(options::OPT_shared) &&
       (Args.hasArg(options::OPT_pie) || ToolChain.isPIEDefault());
   ArgStringList CmdArgs;

   // Silence warning for "clang -g foo.o -o foo"
   Args.ClaimAllArgs(options::OPT_g_Group);
   // and "clang -emit-llvm foo.o -o foo"
   Args.ClaimAllArgs(options::OPT_emit_llvm);
   // and for "clang -w foo.o -o foo". Other warning options are already
   // handled somewhere else.
   Args.ClaimAllArgs(options::OPT_w);

   if (!D.SysRoot.empty())
     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));

   if (IsPIE)
     CmdArgs.push_back("-pie");

   CmdArgs.push_back("--eh-frame-hdr");
   if (Args.hasArg(options::OPT_static)) {
     CmdArgs.push_back("-Bstatic");
   } else {
     if (Args.hasArg(options::OPT_rdynamic))
       CmdArgs.push_back("-export-dynamic");
     if (Args.hasArg(options::OPT_shared)) {
       CmdArgs.push_back("-Bshareable");
     } else {
       CmdArgs.push_back("-dynamic-linker");
       CmdArgs.push_back("/libexec/ld-elf.so.1");
     }
     if (ToolChain.getTriple().getOSMajorVersion() >= 9) {
       if (Arch == llvm::Triple::arm || Arch == llvm::Triple::sparc ||
           Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64) {
         CmdArgs.push_back("--hash-style=both");
       }
     }
     CmdArgs.push_back("--enable-new-dtags");
   }

   // Explicitly set the linker emulation for platforms that might not
   // be the default emulation for the linker.
   switch (Arch) {
   case llvm::Triple::x86:
     CmdArgs.push_back("-m");
     CmdArgs.push_back("elf_i386_fbsd");
     break;
   case llvm::Triple::ppc:
     CmdArgs.push_back("-m");
     CmdArgs.push_back("elf32ppc_fbsd");
     break;
   case llvm::Triple::mips:
     CmdArgs.push_back("-m");
     CmdArgs.push_back("elf32btsmip_fbsd");
     break;
   case llvm::Triple::mipsel:
     CmdArgs.push_back("-m");
     CmdArgs.push_back("elf32ltsmip_fbsd");
     break;
   case llvm::Triple::mips64:
     CmdArgs.push_back("-m");
     if (tools::mips::hasMipsAbiArg(Args, "n32"))
       CmdArgs.push_back("elf32btsmipn32_fbsd");
     else
       CmdArgs.push_back("elf64btsmip_fbsd");
     break;
   case llvm::Triple::mips64el:
     CmdArgs.push_back("-m");
     if (tools::mips::hasMipsAbiArg(Args, "n32"))
       CmdArgs.push_back("elf32ltsmipn32_fbsd");
     else
       CmdArgs.push_back("elf64ltsmip_fbsd");
     break;
   default:
     break;
   }

   if (Arg *A = Args.getLastArg(options::OPT_G)) {
     if (ToolChain.getTriple().isMIPS()) {
       StringRef v = A->getValue();
       CmdArgs.push_back(Args.MakeArgString("-G" + v));
       A->claim();
     }
   }

   if (Output.isFilename()) {
     CmdArgs.push_back("-o");
     CmdArgs.push_back(Output.getFilename());
   } else {
     assert(Output.isNothing() && "Invalid output.");
   }

   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
     const char *crt1 = nullptr;
     if (!Args.hasArg(options::OPT_shared)) {
       if (Args.hasArg(options::OPT_pg))
         crt1 = "gcrt1.o";
       else if (IsPIE)
         crt1 = "Scrt1.o";
       else
         crt1 = "crt1.o";
     }
     if (crt1)
       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt1)));

     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));

     const char *crtbegin = nullptr;
     if (Args.hasArg(options::OPT_static))
       crtbegin = "crtbeginT.o";
     else if (Args.hasArg(options::OPT_shared) || IsPIE)
       crtbegin = "crtbeginS.o";
     else
       crtbegin = "crtbegin.o";

     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
   }

   Args.AddAllArgs(CmdArgs, options::OPT_L);
   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
   Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
   Args.AddAllArgs(CmdArgs, options::OPT_e);
   Args.AddAllArgs(CmdArgs, options::OPT_s);
   Args.AddAllArgs(CmdArgs, options::OPT_t);
   Args.AddAllArgs(CmdArgs, options::OPT_Z_Flag);
   Args.AddAllArgs(CmdArgs, options::OPT_r);

   if (D.isUsingLTO()) {
     assert(!Inputs.empty() && "Must have at least one input.");
     AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0],
                   D.getLTOMode() == LTOK_Thin);
   }

   bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
   bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);

   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
     addOpenMPRuntime(CmdArgs, ToolChain, Args);
     if (D.CCCIsCXX()) {
       if (ToolChain.ShouldLinkCXXStdlib(Args))
         ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
       if (Args.hasArg(options::OPT_pg))
         CmdArgs.push_back("-lm_p");
       else
         CmdArgs.push_back("-lm");
     }
     if (NeedsSanitizerDeps)
       linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
     if (NeedsXRayDeps)
       linkXRayRuntimeDeps(ToolChain, CmdArgs);
     // FIXME: For some reason GCC passes -lgcc and -lgcc_s before adding
     // the default system libraries. Just mimic this for now.
     if (Args.hasArg(options::OPT_pg))
       CmdArgs.push_back("-lgcc_p");
     else
       CmdArgs.push_back("-lgcc");
     if (Args.hasArg(options::OPT_static)) {
       CmdArgs.push_back("-lgcc_eh");
     } else if (Args.hasArg(options::OPT_pg)) {
       CmdArgs.push_back("-lgcc_eh_p");
     } else {
       CmdArgs.push_back("--as-needed");
       CmdArgs.push_back("-lgcc_s");
       CmdArgs.push_back("--no-as-needed");
     }

     if (Args.hasArg(options::OPT_pthread)) {
       if (Args.hasArg(options::OPT_pg))
         CmdArgs.push_back("-lpthread_p");
       else
         CmdArgs.push_back("-lpthread");
     }

     if (Args.hasArg(options::OPT_pg)) {
       if (Args.hasArg(options::OPT_shared))
         CmdArgs.push_back("-lc");
       else
         CmdArgs.push_back("-lc_p");
       CmdArgs.push_back("-lgcc_p");
     } else {
       CmdArgs.push_back("-lc");
       CmdArgs.push_back("-lgcc");
     }

     if (Args.hasArg(options::OPT_static)) {
       CmdArgs.push_back("-lgcc_eh");
     } else if (Args.hasArg(options::OPT_pg)) {
       CmdArgs.push_back("-lgcc_eh_p");
     } else {
       CmdArgs.push_back("--as-needed");
       CmdArgs.push_back("-lgcc_s");
       CmdArgs.push_back("--no-as-needed");
     }
   }

   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
     if (Args.hasArg(options::OPT_shared) || IsPIE)
       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtendS.o")));
     else
       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
   }

   ToolChain.addProfileRTLibs(Args, CmdArgs);

   const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
 }

 /// FreeBSD - FreeBSD tool chain which can call as(1) and ld(1) directly.

 FreeBSD::FreeBSD(const Driver &D, const llvm::Triple &Triple,
                  const ArgList &Args)
     : Generic_ELF(D, Triple, Args) {

   // When targeting 32-bit platforms, look for '/usr/lib32/crt1.o' and fall
   // back to '/usr/lib' if it doesn't exist.
   if ((Triple.getArch() == llvm::Triple::x86 || Triple.isMIPS32() ||
        Triple.getArch() == llvm::Triple::ppc) &&
       D.getVFS().exists(getDriver().SysRoot + "/usr/lib32/crt1.o"))
     getFilePaths().push_back(getDriver().SysRoot + "/usr/lib32");
   else
     getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
 }

 ToolChain::CXXStdlibType FreeBSD::GetDefaultCXXStdlibType() const {
   if (getTriple().getOSMajorVersion() >= 10)
     return ToolChain::CST_Libcxx;
   return ToolChain::CST_Libstdcxx;
 }

 void FreeBSD::addLibStdCxxIncludePaths(
     const llvm::opt::ArgList &DriverArgs,
     llvm::opt::ArgStringList &CC1Args) const {
   addLibStdCXXIncludePaths(getDriver().SysRoot, "/usr/include/c++/4.2", "", "",
                            "", "", DriverArgs, CC1Args);
 }

 void FreeBSD::AddCXXStdlibLibArgs(const ArgList &Args,
                                   ArgStringList &CmdArgs) const {
   CXXStdlibType Type = GetCXXStdlibType(Args);
   bool Profiling = Args.hasArg(options::OPT_pg);

   switch (Type) {
   case ToolChain::CST_Libcxx:
     CmdArgs.push_back(Profiling ? "-lc++_p" : "-lc++");
     break;

   case ToolChain::CST_Libstdcxx:
     CmdArgs.push_back(Profiling ? "-lstdc++_p" : "-lstdc++");
     break;
   }
 }

 Tool *FreeBSD::buildAssembler() const {
   return new tools::freebsd::Assembler(*this);
 }

 Tool *FreeBSD::buildLinker() const { return new tools::freebsd::Linker(*this); }

 llvm::ExceptionHandling FreeBSD::GetExceptionModel(const ArgList &Args) const {
   // FreeBSD uses SjLj exceptions on ARM oabi.
   switch (getTriple().getEnvironment()) {
   case llvm::Triple::GNUEABIHF:
   case llvm::Triple::GNUEABI:
   case llvm::Triple::EABI:
     return llvm::ExceptionHandling::None;
   default:
     if (getTriple().getArch() == llvm::Triple::arm ||
         getTriple().getArch() == llvm::Triple::thumb)
       return llvm::ExceptionHandling::SjLj;
     return llvm::ExceptionHandling::None;
   }
 }

 bool FreeBSD::HasNativeLLVMSupport() const { return true; }

 bool FreeBSD::isPIEDefault() const { return getSanitizerArgs().requiresPIE(); }

 SanitizerMask FreeBSD::getSupportedSanitizers() const {
   const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
   const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
   const bool IsMIPS64 = getTriple().isMIPS64();
   SanitizerMask Res = ToolChain::getSupportedSanitizers();
   Res |= SanitizerKind::Address;
   Res |= SanitizerKind::Vptr;
   if (IsX86_64 || IsMIPS64) {
     Res |= SanitizerKind::Leak;
     Res |= SanitizerKind::Thread;
   }
   if (IsX86 || IsX86_64) {
     Res |= SanitizerKind::Function;
     Res |= SanitizerKind::SafeStack;
     Res |= SanitizerKind::Fuzzer;
     Res |= SanitizerKind::FuzzerNoLink;
   }
   if (IsX86_64)
     Res |= SanitizerKind::Memory;
   return Res;
 }
	//===--- FreeBSD.cpp - FreeBSD ToolChain Implementations --------- C++ --===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//

	#include "FreeBSD.h"
	#include "Arch/ARM.h"
	#include "Arch/Mips.h"
	#include "Arch/Sparc.h"
	#include "CommonArgs.h"
	#include "clang/Basic/VirtualFileSystem.h"
	#include "clang/Driver/Compilation.h"
	#include "clang/Driver/Options.h"
	#include "clang/Driver/SanitizerArgs.h"
	#include "llvm/Option/ArgList.h"

	using namespace clang::driver;
	using namespace clang::driver::tools;
	using namespace clang::driver::toolchains;
	using namespace clang;
	using namespace llvm::opt;

	void freebsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
	const InputInfo &Output,
	const InputInfoList &Inputs,
	const ArgList &Args,
	const char *LinkingOutput) const {
	claimNoWarnArgs(Args);
	ArgStringList CmdArgs;

	// When building 32-bit code on FreeBSD/amd64, we have to explicitly
	// instruct as in the base system to assemble 32-bit code.
	switch (getToolChain().getArch()) {
	default:
	break;
	case llvm::Triple::x86:
	CmdArgs.push_back("--32");
	break;
	case llvm::Triple::ppc:
	CmdArgs.push_back("-a32");
	break;
	case llvm::Triple::mips:
	case llvm::Triple::mipsel:
	case llvm::Triple::mips64:
	case llvm::Triple::mips64el: {
	StringRef CPUName;
	StringRef ABIName;
	mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName);

	CmdArgs.push_back("-march");
	CmdArgs.push_back(CPUName.data());

	CmdArgs.push_back("-mabi");
	CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());

	if (getToolChain().getTriple().isLittleEndian())
	CmdArgs.push_back("-EL");
	else
	CmdArgs.push_back("-EB");

	if (Arg *A = Args.getLastArg(options::OPT_G)) {
	StringRef v = A->getValue();
	CmdArgs.push_back(Args.MakeArgString("-G" + v));
	A->claim();
	}

	AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
	break;
	}
	case llvm::Triple::arm:
	case llvm::Triple::armeb:
	case llvm::Triple::thumb:
	case llvm::Triple::thumbeb: {
	arm::FloatABI ABI = arm::getARMFloatABI(getToolChain(), Args);

	if (ABI == arm::FloatABI::Hard)
	CmdArgs.push_back("-mfpu=vfp");
	else
	CmdArgs.push_back("-mfpu=softvfp");

	switch (getToolChain().getTriple().getEnvironment()) {
	case llvm::Triple::GNUEABIHF:
	case llvm::Triple::GNUEABI:
	case llvm::Triple::EABI:
	CmdArgs.push_back("-meabi=5");
	break;

	default:
	CmdArgs.push_back("-matpcs");
	}
	break;
	}
	case llvm::Triple::sparc:
	case llvm::Triple::sparcel:
	case llvm::Triple::sparcv9: {
	std::string CPU = getCPUName(Args, getToolChain().getTriple());
	CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
	AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
	break;
	}
	}

	Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);

	CmdArgs.push_back("-o");
	CmdArgs.push_back(Output.getFilename());

	for (const auto &II : Inputs)
	CmdArgs.push_back(II.getFilename());

	const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
	C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
	}

	void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
	const InputInfo &Output,
	const InputInfoList &Inputs,
	const ArgList &Args,
	const char *LinkingOutput) const {
	const toolchains::FreeBSD &ToolChain =
	static_cast<const toolchains::FreeBSD &>(getToolChain());
	const Driver &D = ToolChain.getDriver();
	const llvm::Triple::ArchType Arch = ToolChain.getArch();
	const bool IsPIE =
	!Args.hasArg(options::OPT_shared) &&
	(Args.hasArg(options::OPT_pie) \|\| ToolChain.isPIEDefault());
	ArgStringList CmdArgs;

	// Silence warning for "clang -g foo.o -o foo"
	Args.ClaimAllArgs(options::OPT_g_Group);
	// and "clang -emit-llvm foo.o -o foo"
	Args.ClaimAllArgs(options::OPT_emit_llvm);
	// and for "clang -w foo.o -o foo". Other warning options are already
	// handled somewhere else.
	Args.ClaimAllArgs(options::OPT_w);

	if (!D.SysRoot.empty())
	CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));

	if (IsPIE)
	CmdArgs.push_back("-pie");

	CmdArgs.push_back("--eh-frame-hdr");
	if (Args.hasArg(options::OPT_static)) {
	CmdArgs.push_back("-Bstatic");
	} else {
	if (Args.hasArg(options::OPT_rdynamic))
	CmdArgs.push_back("-export-dynamic");
	if (Args.hasArg(options::OPT_shared)) {
	CmdArgs.push_back("-Bshareable");
	} else {
	CmdArgs.push_back("-dynamic-linker");
	CmdArgs.push_back("/libexec/ld-elf.so.1");
	}
	if (ToolChain.getTriple().getOSMajorVersion() >= 9) {
	if (Arch == llvm::Triple::arm \|\| Arch == llvm::Triple::sparc \|\|
	Arch == llvm::Triple::x86 \|\| Arch == llvm::Triple::x86_64) {
	CmdArgs.push_back("--hash-style=both");
	}
	}
	CmdArgs.push_back("--enable-new-dtags");
	}

	// Explicitly set the linker emulation for platforms that might not
	// be the default emulation for the linker.
	switch (Arch) {
	case llvm::Triple::x86:
	CmdArgs.push_back("-m");
	CmdArgs.push_back("elf_i386_fbsd");
	break;
	case llvm::Triple::ppc:
	CmdArgs.push_back("-m");
	CmdArgs.push_back("elf32ppc_fbsd");
	break;
	case llvm::Triple::mips:
	CmdArgs.push_back("-m");
	CmdArgs.push_back("elf32btsmip_fbsd");
	break;
	case llvm::Triple::mipsel:
	CmdArgs.push_back("-m");
	CmdArgs.push_back("elf32ltsmip_fbsd");
	break;
	case llvm::Triple::mips64:
	CmdArgs.push_back("-m");
	if (tools::mips::hasMipsAbiArg(Args, "n32"))
	CmdArgs.push_back("elf32btsmipn32_fbsd");
	else
	CmdArgs.push_back("elf64btsmip_fbsd");
	break;
	case llvm::Triple::mips64el:
	CmdArgs.push_back("-m");
	if (tools::mips::hasMipsAbiArg(Args, "n32"))
	CmdArgs.push_back("elf32ltsmipn32_fbsd");
	else
	CmdArgs.push_back("elf64ltsmip_fbsd");
	break;
	default:
	break;
	}

	if (Arg *A = Args.getLastArg(options::OPT_G)) {
	if (ToolChain.getTriple().isMIPS()) {
	StringRef v = A->getValue();
	CmdArgs.push_back(Args.MakeArgString("-G" + v));
	A->claim();
	}
	}

	if (Output.isFilename()) {
	CmdArgs.push_back("-o");
	CmdArgs.push_back(Output.getFilename());
	} else {
	assert(Output.isNothing() && "Invalid output.");
	}

	if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
	const char *crt1 = nullptr;
	if (!Args.hasArg(options::OPT_shared)) {
	if (Args.hasArg(options::OPT_pg))
	crt1 = "gcrt1.o";
	else if (IsPIE)
	crt1 = "Scrt1.o";
	else
	crt1 = "crt1.o";
	}
	if (crt1)
	CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt1)));

	CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));

	const char *crtbegin = nullptr;
	if (Args.hasArg(options::OPT_static))
	crtbegin = "crtbeginT.o";
	else if (Args.hasArg(options::OPT_shared) \|\| IsPIE)
	crtbegin = "crtbeginS.o";
	else
	crtbegin = "crtbegin.o";

	CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
	}

	Args.AddAllArgs(CmdArgs, options::OPT_L);
	ToolChain.AddFilePathLibArgs(Args, CmdArgs);
	Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
	Args.AddAllArgs(CmdArgs, options::OPT_e);
	Args.AddAllArgs(CmdArgs, options::OPT_s);
	Args.AddAllArgs(CmdArgs, options::OPT_t);
	Args.AddAllArgs(CmdArgs, options::OPT_Z_Flag);
	Args.AddAllArgs(CmdArgs, options::OPT_r);

	if (D.isUsingLTO()) {
	assert(!Inputs.empty() && "Must have at least one input.");
	AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0],
	D.getLTOMode() == LTOK_Thin);
	}

	bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
	bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
	AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);

	if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
	addOpenMPRuntime(CmdArgs, ToolChain, Args);
	if (D.CCCIsCXX()) {
	if (ToolChain.ShouldLinkCXXStdlib(Args))
	ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
	if (Args.hasArg(options::OPT_pg))
	CmdArgs.push_back("-lm_p");
	else
	CmdArgs.push_back("-lm");
	}
	if (NeedsSanitizerDeps)
	linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
	if (NeedsXRayDeps)
	linkXRayRuntimeDeps(ToolChain, CmdArgs);
	// FIXME: For some reason GCC passes -lgcc and -lgcc_s before adding
	// the default system libraries. Just mimic this for now.
	if (Args.hasArg(options::OPT_pg))
	CmdArgs.push_back("-lgcc_p");
	else
	CmdArgs.push_back("-lgcc");
	if (Args.hasArg(options::OPT_static)) {
	CmdArgs.push_back("-lgcc_eh");
	} else if (Args.hasArg(options::OPT_pg)) {
	CmdArgs.push_back("-lgcc_eh_p");
	} else {
	CmdArgs.push_back("--as-needed");
	CmdArgs.push_back("-lgcc_s");
	CmdArgs.push_back("--no-as-needed");
	}

	if (Args.hasArg(options::OPT_pthread)) {
	if (Args.hasArg(options::OPT_pg))
	CmdArgs.push_back("-lpthread_p");
	else
	CmdArgs.push_back("-lpthread");
	}

	if (Args.hasArg(options::OPT_pg)) {
	if (Args.hasArg(options::OPT_shared))
	CmdArgs.push_back("-lc");
	else
	CmdArgs.push_back("-lc_p");
	CmdArgs.push_back("-lgcc_p");
	} else {
	CmdArgs.push_back("-lc");
	CmdArgs.push_back("-lgcc");
	}

	if (Args.hasArg(options::OPT_static)) {
	CmdArgs.push_back("-lgcc_eh");
	} else if (Args.hasArg(options::OPT_pg)) {
	CmdArgs.push_back("-lgcc_eh_p");
	} else {
	CmdArgs.push_back("--as-needed");
	CmdArgs.push_back("-lgcc_s");
	CmdArgs.push_back("--no-as-needed");
	}
	}

	if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
	if (Args.hasArg(options::OPT_shared) \|\| IsPIE)
	CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtendS.o")));
	else
	CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
	CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
	}

	ToolChain.addProfileRTLibs(Args, CmdArgs);

	const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
	C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
	}

	/// FreeBSD - FreeBSD tool chain which can call as(1) and ld(1) directly.

	FreeBSD::FreeBSD(const Driver &D, const llvm::Triple &Triple,
	const ArgList &Args)
	: Generic_ELF(D, Triple, Args) {

	// When targeting 32-bit platforms, look for '/usr/lib32/crt1.o' and fall
	// back to '/usr/lib' if it doesn't exist.
	if ((Triple.getArch() == llvm::Triple::x86 \|\| Triple.isMIPS32() \|\|
	Triple.getArch() == llvm::Triple::ppc) &&
	D.getVFS().exists(getDriver().SysRoot + "/usr/lib32/crt1.o"))
	getFilePaths().push_back(getDriver().SysRoot + "/usr/lib32");
	else
	getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
	}

	ToolChain::CXXStdlibType FreeBSD::GetDefaultCXXStdlibType() const {
	if (getTriple().getOSMajorVersion() >= 10)
	return ToolChain::CST_Libcxx;
	return ToolChain::CST_Libstdcxx;
	}

	void FreeBSD::addLibStdCxxIncludePaths(
	const llvm::opt::ArgList &DriverArgs,
	llvm::opt::ArgStringList &CC1Args) const {
	addLibStdCXXIncludePaths(getDriver().SysRoot, "/usr/include/c++/4.2", "", "",
	"", "", DriverArgs, CC1Args);
	}

	void FreeBSD::AddCXXStdlibLibArgs(const ArgList &Args,
	ArgStringList &CmdArgs) const {
	CXXStdlibType Type = GetCXXStdlibType(Args);
	bool Profiling = Args.hasArg(options::OPT_pg);

	switch (Type) {
	case ToolChain::CST_Libcxx:
	CmdArgs.push_back(Profiling ? "-lc++_p" : "-lc++");
	break;

	case ToolChain::CST_Libstdcxx:
	CmdArgs.push_back(Profiling ? "-lstdc++_p" : "-lstdc++");
	break;
	}
	}

	Tool *FreeBSD::buildAssembler() const {
	return new tools::freebsd::Assembler(*this);
	}

	Tool FreeBSD::buildLinker() const { return new tools::freebsd::Linker(this); }

	llvm::ExceptionHandling FreeBSD::GetExceptionModel(const ArgList &Args) const {
	// FreeBSD uses SjLj exceptions on ARM oabi.
	switch (getTriple().getEnvironment()) {
	case llvm::Triple::GNUEABIHF:
	case llvm::Triple::GNUEABI:
	case llvm::Triple::EABI:
	return llvm::ExceptionHandling::None;
	default:
	if (getTriple().getArch() == llvm::Triple::arm \|\|
	getTriple().getArch() == llvm::Triple::thumb)
	return llvm::ExceptionHandling::SjLj;
	return llvm::ExceptionHandling::None;
	}
	}

	bool FreeBSD::HasNativeLLVMSupport() const { return true; }

	bool FreeBSD::isPIEDefault() const { return getSanitizerArgs().requiresPIE(); }

	SanitizerMask FreeBSD::getSupportedSanitizers() const {
	const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
	const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
	const bool IsMIPS64 = getTriple().isMIPS64();
	SanitizerMask Res = ToolChain::getSupportedSanitizers();
	Res \|= SanitizerKind::Address;
	Res \|= SanitizerKind::Vptr;
	if (IsX86_64 \|\| IsMIPS64) {
	Res \|= SanitizerKind::Leak;
	Res \|= SanitizerKind::Thread;
	}
	if (IsX86 \|\| IsX86_64) {
	Res \|= SanitizerKind::Function;
	Res \|= SanitizerKind::SafeStack;
	Res \|= SanitizerKind::Fuzzer;
	Res \|= SanitizerKind::FuzzerNoLink;
	}
	if (IsX86_64)
	Res \|= SanitizerKind::Memory;
	return Res;
	}