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     CmdArgs.push_back("-z");
  51     CmdArgs.push_back("rodynamic");
  52   }
  53
  54   if (!D.SysRoot.empty())
  55     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
  56
  57   if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_r))
  58     CmdArgs.push_back("-pie");
  59
  60   if (Args.hasArg(options::OPT_rdynamic))
  61     CmdArgs.push_back("-export-dynamic");
  62
  63   if (Args.hasArg(options::OPT_s))
  64     CmdArgs.push_back("-s");
  65
  66   if (Args.hasArg(options::OPT_r))
  67     CmdArgs.push_back("-r");
  68   else
  69     CmdArgs.push_back("--build-id");
  70
  71   if (!Args.hasArg(options::OPT_static))
  72     CmdArgs.push_back("--eh-frame-hdr");
  73
  74   if (Args.hasArg(options::OPT_static))
  75     CmdArgs.push_back("-Bstatic");
  76   else if (Args.hasArg(options::OPT_shared))
  77     CmdArgs.push_back("-shared");
  78
  79   if (!Args.hasArg(options::OPT_static)) {
  80     if (Args.hasArg(options::OPT_rdynamic))
  81       CmdArgs.push_back("-export-dynamic");
  82
  83     if (!Args.hasArg(options::OPT_shared)) {
  84       CmdArgs.push_back("-dynamic-linker");
  85       CmdArgs.push_back(Args.MakeArgString(D.DyldPrefix + "ld.so.1"));
  86     }
  87   }
  88
  89   CmdArgs.push_back("-o");
  90   CmdArgs.push_back(Output.getFilename());
  91
  92   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
  93     if (!Args.hasArg(options::OPT_shared)) {
  94       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("Scrt1.o")));
  95     }
  96   }
  97
  98   Args.AddAllArgs(CmdArgs, options::OPT_L);
  99   Args.AddAllArgs(CmdArgs, options::OPT_u);
 100
 101   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
 102
 103   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 104
 105   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
 106     if (Args.hasArg(options::OPT_static))
 107       CmdArgs.push_back("-Bdynamic");
 108
 109     if (D.CCCIsCXX()) {
 110       bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
 111                                  !Args.hasArg(options::OPT_static);
 112       if (OnlyLibstdcxxStatic)
 113         CmdArgs.push_back("-Bstatic");
 114       ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
 115       if (OnlyLibstdcxxStatic)
 116         CmdArgs.push_back("-Bdynamic");
 117       CmdArgs.push_back("-lm");
 118     }
 119
 120     AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
 121
 122     if (Args.hasArg(options::OPT_pthread) ||
 123         Args.hasArg(options::OPT_pthreads))
 124       CmdArgs.push_back("-lpthread");
 125
 126     if (Args.hasArg(options::OPT_fsplit_stack))
 127       CmdArgs.push_back("--wrap=pthread_create");
 128
 129     CmdArgs.push_back("-lc");
 130   }
 131
 132   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
 133 }
 134
 135 /// Fuchsia - Fuchsia tool chain which can call as(1) and ld(1) directly.
 136
 137 static std::string normalizeTriple(llvm::Triple Triple) {
 138   SmallString<64> T;
 139   T += Triple.getArchName();
 140   T += "-";
 141   T += Triple.getOSName();
 142   return T.str();
 143 }
 144
 145 static std::string getTargetDir(const Driver &D,
 146                                 llvm::Triple Triple) {
 147   SmallString<128> P(llvm::sys::path::parent_path(D.Dir));
 148   llvm::sys::path::append(P, "lib", normalizeTriple(Triple));
 149   return P.str();
 150 }
 151
 152 Fuchsia::Fuchsia(const Driver &D, const llvm::Triple &Triple,
 153                  const ArgList &Args)
 154     : ToolChain(D, Triple, Args) {
 155   getProgramPaths().push_back(getDriver().getInstalledDir());
 156   if (getDriver().getInstalledDir() != D.Dir)
 157     getProgramPaths().push_back(D.Dir);
 158
 159   SmallString<128> P(getTargetDir(D, getTriple()));
 160   llvm::sys::path::append(P, "lib");
 161   getFilePaths().push_back(P.str());
 162
 163   if (!D.SysRoot.empty()) {
 164     SmallString<128> P(D.SysRoot);
 165     llvm::sys::path::append(P, "lib");
 166     getFilePaths().push_back(P.str());
 167   }
 168 }
 169
 170 std::string Fuchsia::ComputeEffectiveClangTriple(const ArgList &Args,
 171                                                  types::ID InputType) const {
 172   llvm::Triple Triple(ComputeLLVMTriple(Args, InputType));
 173   Triple.setTriple(normalizeTriple(Triple));
 174   return Triple.getTriple();
 175 }
 176
 177 Tool *Fuchsia::buildLinker() const {
 178   return new tools::fuchsia::Linker(*this);
 179 }
 180
 181 ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
 182     const ArgList &Args) const {
 183   if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) {
 184     StringRef Value = A->getValue();
 185     if (Value != "compiler-rt")
 186       getDriver().Diag(clang::diag::err_drv_invalid_rtlib_name)
 187           << A->getAsString(Args);
 188   }
 189
 190   return ToolChain::RLT_CompilerRT;
 191 }
 192
 193 ToolChain::CXXStdlibType
 194 Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
 195   if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
 196     StringRef Value = A->getValue();
 197     if (Value != "libc++")
 198       getDriver().Diag(diag::err_drv_invalid_stdlib_name)
 199         << A->getAsString(Args);
 200   }
 201
 202   return ToolChain::CST_Libcxx;
 203 }
 204
 205 void Fuchsia::addClangTargetOptions(const ArgList &DriverArgs,
 206                                     ArgStringList &CC1Args,
 207                                     Action::OffloadKind) const {
 208   if (DriverArgs.hasFlag(options::OPT_fuse_init_array,
 209                          options::OPT_fno_use_init_array, true))
 210     CC1Args.push_back("-fuse-init-array");
 211 }
 212
 213 void Fuchsia::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
 214                                         ArgStringList &CC1Args) const {
 215   const Driver &D = getDriver();
 216
 217   if (DriverArgs.hasArg(options::OPT_nostdinc))
 218     return;
 219
 220   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
 221     SmallString<128> P(D.ResourceDir);
 222     llvm::sys::path::append(P, "include");
 223     addSystemInclude(DriverArgs, CC1Args, P);
 224   }
 225
 226   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
 227     return;
 228
 229   // Check for configure-time C include directories.
 230   StringRef CIncludeDirs(C_INCLUDE_DIRS);
 231   if (CIncludeDirs != "") {
 232     SmallVector<StringRef, 5> dirs;
 233     CIncludeDirs.split(dirs, ":");
 234     for (StringRef dir : dirs) {
 235       StringRef Prefix =
 236           llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
 237       addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
 238     }
 239     return;
 240   }
 241
 242   if (!D.SysRoot.empty()) {
 243     SmallString<128> P(D.SysRoot);
 244     llvm::sys::path::append(P, "include");
 245     addExternCSystemInclude(DriverArgs, CC1Args, P.str());
 246   }
 247 }
 248
 249 void Fuchsia::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
 250                                            ArgStringList &CC1Args) const {
 251   if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
 252       DriverArgs.hasArg(options::OPT_nostdincxx))
 253     return;
 254
 255   switch (GetCXXStdlibType(DriverArgs)) {
 256   case ToolChain::CST_Libcxx: {
 257     SmallString<128> P(getTargetDir(getDriver(), getTriple()));
 258     llvm::sys::path::append(P, "include", "c++", "v1");
 259     addSystemInclude(DriverArgs, CC1Args, P.str());
 260     break;
 261   }
 262
 263   default:
 264     llvm_unreachable("invalid stdlib name");
 265   }
 266 }
 267
 268 void Fuchsia::AddCXXStdlibLibArgs(const ArgList &Args,
 269                                   ArgStringList &CmdArgs) const {
 270   switch (GetCXXStdlibType(Args)) {
 271   case ToolChain::CST_Libcxx:
 272     CmdArgs.push_back("-lc++");
 273     CmdArgs.push_back("-lc++abi");
 274     CmdArgs.push_back("-lunwind");
 275     break;
 276
 277   case ToolChain::CST_Libstdcxx:
 278     llvm_unreachable("invalid stdlib name");
 279   }
 280 }
 281
 282 SanitizerMask Fuchsia::getSupportedSanitizers() const {
 283   SanitizerMask Res = ToolChain::getSupportedSanitizers();
 284   Res |= SanitizerKind::SafeStack;
 285   return Res;
 286 }