contrib/llvm/tools/clang/lib/Driver/ToolChains/Fuchsia.cpp

   1 //===--- Fuchsia.cpp - Fuchsia ToolChain Implementations --------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "Fuchsia.h"
  11 #include "CommonArgs.h"
  12 #include "clang/Config/config.h"
  13 #include "clang/Driver/Compilation.h"
  14 #include "clang/Driver/Driver.h"
  15 #include "clang/Driver/DriverDiagnostic.h"
  16 #include "clang/Driver/Options.h"
  17 #include "llvm/Option/ArgList.h"
  18 #include "llvm/Support/Path.h"
  19
  20 using namespace clang::driver;
  21 using namespace clang::driver::toolchains;
  22 using namespace clang::driver::tools;
  23 using namespace clang;
  24 using namespace llvm::opt;
  25
  26 void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
  27                                    const InputInfo &Output,
  28                                    const InputInfoList &Inputs,
  29                                    const ArgList &Args,
  30                                    const char *LinkingOutput) const {
  31   const toolchains::Fuchsia &ToolChain =
  32       static_cast<const toolchains::Fuchsia &>(getToolChain());
  33   const Driver &D = ToolChain.getDriver();
  34
  35   ArgStringList CmdArgs;
  36
  37   // Silence warning for "clang -g foo.o -o foo"
  38   Args.ClaimAllArgs(options::OPT_g_Group);
  39   // and "clang -emit-llvm foo.o -o foo"
  40   Args.ClaimAllArgs(options::OPT_emit_llvm);
  41   // and for "clang -w foo.o -o foo". Other warning options are already
  42   // handled somewhere else.
  43   Args.ClaimAllArgs(options::OPT_w);
  44
  45   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
  46   if (llvm::sys::path::stem(Exec).equals_lower("lld")) {
  47     CmdArgs.push_back("-flavor");
  48     CmdArgs.push_back("gnu");
  49   }
  50
  51   if (!D.SysRoot.empty())
  52     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
  53
  54   if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_r))
  55     CmdArgs.push_back("-pie");
  56
  57   if (Args.hasArg(options::OPT_rdynamic))
  58     CmdArgs.push_back("-export-dynamic");
  59
  60   if (Args.hasArg(options::OPT_s))
  61     CmdArgs.push_back("-s");
  62
  63   if (Args.hasArg(options::OPT_r))
  64     CmdArgs.push_back("-r");
  65   else
  66     CmdArgs.push_back("--build-id");
  67
  68   if (!Args.hasArg(options::OPT_static))
  69     CmdArgs.push_back("--eh-frame-hdr");
  70
  71   if (Args.hasArg(options::OPT_static))
  72     CmdArgs.push_back("-Bstatic");
  73   else if (Args.hasArg(options::OPT_shared))
  74     CmdArgs.push_back("-shared");
  75
  76   if (!Args.hasArg(options::OPT_static)) {
  77     if (Args.hasArg(options::OPT_rdynamic))
  78       CmdArgs.push_back("-export-dynamic");
  79
  80     if (!Args.hasArg(options::OPT_shared)) {
  81       CmdArgs.push_back("-dynamic-linker");
  82       CmdArgs.push_back(Args.MakeArgString(D.DyldPrefix + "ld.so.1"));
  83     }
  84   }
  85
  86   CmdArgs.push_back("-o");
  87   CmdArgs.push_back(Output.getFilename());
  88
  89   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
  90     if (!Args.hasArg(options::OPT_shared)) {
  91       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("Scrt1.o")));
  92     }
  93   }
  94
  95   Args.AddAllArgs(CmdArgs, options::OPT_L);
  96   Args.AddAllArgs(CmdArgs, options::OPT_u);
  97
  98   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
  99
 100   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 101
 102   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
 103     if (Args.hasArg(options::OPT_static))
 104       CmdArgs.push_back("-Bdynamic");
 105
 106     if (D.CCCIsCXX()) {
 107       bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
 108                                  !Args.hasArg(options::OPT_static);
 109       if (OnlyLibstdcxxStatic)
 110         CmdArgs.push_back("-Bstatic");
 111       ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
 112       if (OnlyLibstdcxxStatic)
 113         CmdArgs.push_back("-Bdynamic");
 114       CmdArgs.push_back("-lm");
 115     }
 116
 117     AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
 118
 119     if (Args.hasArg(options::OPT_pthread) ||
 120         Args.hasArg(options::OPT_pthreads))
 121       CmdArgs.push_back("-lpthread");
 122
 123     if (Args.hasArg(options::OPT_fsplit_stack))
 124       CmdArgs.push_back("--wrap=pthread_create");
 125
 126     CmdArgs.push_back("-lc");
 127   }
 128
 129   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
 130 }
 131
 132 /// Fuchsia - Fuchsia tool chain which can call as(1) and ld(1) directly.
 133
 134 Fuchsia::Fuchsia(const Driver &D, const llvm::Triple &Triple,
 135                  const ArgList &Args)
 136     : Generic_ELF(D, Triple, Args) {
 137
 138   getFilePaths().push_back(D.SysRoot + "/lib");
 139   getFilePaths().push_back(D.ResourceDir + "/lib/fuchsia");
 140 }
 141
 142 Tool *Fuchsia::buildAssembler() const {
 143   return new tools::gnutools::Assembler(*this);
 144 }
 145
 146 Tool *Fuchsia::buildLinker() const {
 147   return new tools::fuchsia::Linker(*this);
 148 }
 149
 150 ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
 151     const ArgList &Args) const {
 152   if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) {
 153     StringRef Value = A->getValue();
 154     if (Value != "compiler-rt")
 155       getDriver().Diag(clang::diag::err_drv_invalid_rtlib_name)
 156           << A->getAsString(Args);
 157   }
 158
 159   return ToolChain::RLT_CompilerRT;
 160 }
 161
 162 ToolChain::CXXStdlibType
 163 Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
 164   if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
 165     StringRef Value = A->getValue();
 166     if (Value != "libc++")
 167       getDriver().Diag(diag::err_drv_invalid_stdlib_name)
 168         << A->getAsString(Args);
 169   }
 170
 171   return ToolChain::CST_Libcxx;
 172 }
 173
 174 void Fuchsia::addClangTargetOptions(const ArgList &DriverArgs,
 175                                     ArgStringList &CC1Args) const {
 176   if (DriverArgs.hasFlag(options::OPT_fuse_init_array,
 177                          options::OPT_fno_use_init_array, true))
 178     CC1Args.push_back("-fuse-init-array");
 179 }
 180
 181 void Fuchsia::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
 182                                         ArgStringList &CC1Args) const {
 183   const Driver &D = getDriver();
 184
 185   if (DriverArgs.hasArg(options::OPT_nostdinc))
 186     return;
 187
 188   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
 189     SmallString<128> P(D.ResourceDir);
 190     llvm::sys::path::append(P, "include");
 191     addSystemInclude(DriverArgs, CC1Args, P);
 192   }
 193
 194   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
 195     return;
 196
 197   // Check for configure-time C include directories.
 198   StringRef CIncludeDirs(C_INCLUDE_DIRS);
 199   if (CIncludeDirs != "") {
 200     SmallVector<StringRef, 5> dirs;
 201     CIncludeDirs.split(dirs, ":");
 202     for (StringRef dir : dirs) {
 203       StringRef Prefix =
 204           llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
 205       addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
 206     }
 207     return;
 208   }
 209
 210   addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/include");
 211 }
 212
 213 std::string Fuchsia::findLibCxxIncludePath() const {
 214   return getDriver().SysRoot + "/include/c++/v1";
 215 }
 216
 217 void Fuchsia::AddCXXStdlibLibArgs(const ArgList &Args,
 218                                   ArgStringList &CmdArgs) const {
 219   (void) GetCXXStdlibType(Args);
 220   CmdArgs.push_back("-lc++");
 221   CmdArgs.push_back("-lc++abi");
 222   CmdArgs.push_back("-lunwind");
 223 }
 224
 225 SanitizerMask Fuchsia::getSupportedSanitizers() const {
 226   SanitizerMask Res = ToolChain::getSupportedSanitizers();
 227   Res |= SanitizerKind::SafeStack;
 228   return Res;
 229 }