clang/lib/Driver/ToolChains/MipsLinux.cpp

   1 //===-- MipsLinux.cpp - Mips 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 "MipsLinux.h"
  10 #include "Arch/Mips.h"
  11 #include "CommonArgs.h"
  12 #include "clang/Driver/Driver.h"
  13 #include "clang/Driver/DriverDiagnostic.h"
  14 #include "clang/Driver/Options.h"
  15 #include "llvm/Option/ArgList.h"
  16 #include "llvm/Support/FileSystem.h"
  17 #include "llvm/Support/Path.h"
  18
  19 using namespace clang::driver;
  20 using namespace clang::driver::toolchains;
  21 using namespace clang;
  22 using namespace llvm::opt;
  23
  24 /// Mips Toolchain
  25 MipsLLVMToolChain::MipsLLVMToolChain(const Driver &D,
  26                                      const llvm::Triple &Triple,
  27                                      const ArgList &Args)
  28     : Linux(D, Triple, Args) {
  29   // Select the correct multilib according to the given arguments.
  30   DetectedMultilibs Result;
  31   findMIPSMultilibs(D, Triple, "", Args, Result);
  32   Multilibs = Result.Multilibs;
  33   SelectedMultilibs = Result.SelectedMultilibs;
  34
  35   // Find out the library suffix based on the ABI.
  36   LibSuffix = tools::mips::getMipsABILibSuffix(Args, Triple);
  37   getFilePaths().clear();
  38   getFilePaths().push_back(computeSysRoot() + "/usr/lib" + LibSuffix);
  39 }
  40
  41 void MipsLLVMToolChain::AddClangSystemIncludeArgs(
  42     const ArgList &DriverArgs, ArgStringList &CC1Args) const {
  43   if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
  44     return;
  45
  46   const Driver &D = getDriver();
  47
  48   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
  49     SmallString<128> P(D.ResourceDir);
  50     llvm::sys::path::append(P, "include");
  51     addSystemInclude(DriverArgs, CC1Args, P);
  52   }
  53
  54   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
  55     return;
  56
  57   const auto &Callback = Multilibs.includeDirsCallback();
  58   if (Callback) {
  59     for (const auto &Path : Callback(SelectedMultilibs.back()))
  60       addExternCSystemIncludeIfExists(DriverArgs, CC1Args, D.Dir + Path);
  61   }
  62 }
  63
  64 Tool *MipsLLVMToolChain::buildLinker() const {
  65   return new tools::gnutools::Linker(*this);
  66 }
  67
  68 std::string MipsLLVMToolChain::computeSysRoot() const {
  69   if (!getDriver().SysRoot.empty())
  70     return getDriver().SysRoot + SelectedMultilibs.back().osSuffix();
  71
  72   const std::string InstalledDir(getDriver().Dir);
  73   std::string SysRootPath =
  74       InstalledDir + "/../sysroot" + SelectedMultilibs.back().osSuffix();
  75   if (llvm::sys::fs::exists(SysRootPath))
  76     return SysRootPath;
  77
  78   return std::string();
  79 }
  80
  81 ToolChain::CXXStdlibType
  82 MipsLLVMToolChain::GetCXXStdlibType(const ArgList &Args) const {
  83   Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
  84   if (A) {
  85     StringRef Value = A->getValue();
  86     if (Value != "libc++")
  87       getDriver().Diag(clang::diag::err_drv_invalid_stdlib_name)
  88           << A->getAsString(Args);
  89   }
  90
  91   return ToolChain::CST_Libcxx;
  92 }
  93
  94 void MipsLLVMToolChain::addLibCxxIncludePaths(
  95     const llvm::opt::ArgList &DriverArgs,
  96     llvm::opt::ArgStringList &CC1Args) const {
  97   if (const auto &Callback = Multilibs.includeDirsCallback()) {
  98     for (std::string Path : Callback(SelectedMultilibs.back())) {
  99       Path = getDriver().Dir + Path + "/c++/v1";
 100       if (llvm::sys::fs::exists(Path)) {
 101         addSystemInclude(DriverArgs, CC1Args, Path);
 102         return;
 103       }
 104     }
 105   }
 106 }
 107
 108 void MipsLLVMToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
 109                                             ArgStringList &CmdArgs) const {
 110   assert((GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) &&
 111          "Only -lc++ (aka libxx) is supported in this toolchain.");
 112
 113   CmdArgs.push_back("-lc++");
 114   if (Args.hasArg(options::OPT_fexperimental_library))
 115     CmdArgs.push_back("-lc++experimental");
 116   CmdArgs.push_back("-lc++abi");
 117   CmdArgs.push_back("-lunwind");
 118 }
 119
 120 std::string MipsLLVMToolChain::getCompilerRT(const ArgList &Args,
 121                                              StringRef Component,
 122                                              FileType Type) const {
 123   SmallString<128> Path(getDriver().ResourceDir);
 124   llvm::sys::path::append(Path, SelectedMultilibs.back().osSuffix(), "lib" + LibSuffix,
 125                           getOS());
 126   const char *Suffix;
 127   switch (Type) {
 128   case ToolChain::FT_Object:
 129     Suffix = ".o";
 130     break;
 131   case ToolChain::FT_Static:
 132     Suffix = ".a";
 133     break;
 134   case ToolChain::FT_Shared:
 135     Suffix = ".so";
 136     break;
 137   }
 138   llvm::sys::path::append(
 139       Path, Twine("libclang_rt." + Component + "-" + "mips" + Suffix));
 140   return std::string(Path);
 141 }