clang  6.0.0svn
MipsLinux.cpp
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1 //===--- Mips.cpp - Mips 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 "MipsLinux.h"
11 #include "Arch/Mips.h"
12 #include "CommonArgs.h"
13 #include "clang/Config/config.h"
14 #include "clang/Driver/Driver.h"
16 #include "clang/Driver/Options.h"
17 #include "llvm/Option/ArgList.h"
18 #include "llvm/Support/FileSystem.h"
19 #include "llvm/Support/Path.h"
20 
21 using namespace clang::driver;
22 using namespace clang::driver::toolchains;
23 using namespace clang;
24 using namespace llvm::opt;
25 
26 /// Mips Toolchain
28  const llvm::Triple &Triple,
29  const ArgList &Args)
30  : Linux(D, Triple, Args) {
31  // Select the correct multilib according to the given arguments.
32  DetectedMultilibs Result;
33  findMIPSMultilibs(D, Triple, "", Args, Result);
34  Multilibs = Result.Multilibs;
35  SelectedMultilib = Result.SelectedMultilib;
36 
37  // Find out the library suffix based on the ABI.
38  LibSuffix = tools::mips::getMipsABILibSuffix(Args, Triple);
39  getFilePaths().clear();
40  getFilePaths().push_back(computeSysRoot() + "/usr/lib" + LibSuffix);
41 }
42 
44  const ArgList &DriverArgs, ArgStringList &CC1Args) const {
45  if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
46  return;
47 
48  const Driver &D = getDriver();
49 
50  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
52  llvm::sys::path::append(P, "include");
53  addSystemInclude(DriverArgs, CC1Args, P);
54  }
55 
56  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
57  return;
58 
59  const auto &Callback = Multilibs.includeDirsCallback();
60  if (Callback) {
61  for (const auto &Path : Callback(SelectedMultilib))
62  addExternCSystemIncludeIfExists(DriverArgs, CC1Args,
63  D.getInstalledDir() + Path);
64  }
65 }
66 
68  return new tools::gnutools::Linker(*this);
69 }
70 
71 std::string MipsLLVMToolChain::computeSysRoot() const {
72  if (!getDriver().SysRoot.empty())
73  return getDriver().SysRoot + SelectedMultilib.osSuffix();
74 
75  const std::string InstalledDir(getDriver().getInstalledDir());
76  std::string SysRootPath =
77  InstalledDir + "/../sysroot" + SelectedMultilib.osSuffix();
78  if (llvm::sys::fs::exists(SysRootPath))
79  return SysRootPath;
80 
81  return std::string();
82 }
83 
85 MipsLLVMToolChain::GetCXXStdlibType(const ArgList &Args) const {
86  Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
87  if (A) {
88  StringRef Value = A->getValue();
89  if (Value != "libc++")
90  getDriver().Diag(clang::diag::err_drv_invalid_stdlib_name)
91  << A->getAsString(Args);
92  }
93 
94  return ToolChain::CST_Libcxx;
95 }
96 
98  if (const auto &Callback = Multilibs.includeDirsCallback()) {
99  for (std::string Path : Callback(SelectedMultilib)) {
100  Path = getDriver().getInstalledDir() + Path + "/c++/v1";
101  if (llvm::sys::fs::exists(Path)) {
102  return Path;
103  }
104  }
105  }
106  return "";
107 }
108 
109 void MipsLLVMToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
110  ArgStringList &CmdArgs) const {
111  assert((GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) &&
112  "Only -lc++ (aka libxx) is supported in this toolchain.");
113 
114  CmdArgs.push_back("-lc++");
115  CmdArgs.push_back("-lc++abi");
116  CmdArgs.push_back("-lunwind");
117 }
118 
119 std::string MipsLLVMToolChain::getCompilerRT(const ArgList &Args,
120  StringRef Component,
121  bool Shared) const {
122  SmallString<128> Path(getDriver().ResourceDir);
123  llvm::sys::path::append(Path, SelectedMultilib.osSuffix(), "lib" + LibSuffix,
124  getOS());
125  llvm::sys::path::append(Path, Twine("libclang_rt." + Component + "-" +
126  "mips" + (Shared ? ".so" : ".a")));
127  return Path.str();
128 }
static void addExternCSystemIncludeIfExists(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Definition: ToolChain.cpp:686
const IncludeDirsFunc & includeDirsCallback() const
Definition: Multilib.h:168
StringRef P
StringRef getOS() const
Definition: ToolChain.h:186
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:116
CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override
Definition: MipsLinux.cpp:85
void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const override
AddCXXStdlibLibArgs - Add the system specific linker arguments to use for the given C++ standard libr...
Definition: MipsLinux.cpp:109
const std::string & osSuffix() const
Get the detected os path suffix for the multi-arch target variant.
Definition: Multilib.h:51
path_list & getFilePaths()
Definition: ToolChain.h:202
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:65
std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const override
Definition: MipsLinux.cpp:119
std::string computeSysRoot() const override
Definition: MipsLinux.cpp:71
const Driver & getDriver() const
Definition: ToolChain.h:167
static void addSystemInclude(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Utility function to add a system include directory to CC1 arguments.
Definition: ToolChain.cpp:664
Dataflow Directional Tag Classes.
std::string SysRoot
sysroot, if present
Definition: Driver.h:149
Tool - Information on a specific compilation tool.
Definition: Tool.h:34
void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add the clang cc1 arguments for system include paths.
Definition: MipsLinux.cpp:43
const char * getInstalledDir() const
Get the path to where the clang executable was installed.
Definition: Driver.h:301
MipsLLVMToolChain(const Driver &D, const llvm::Triple &Triple, const llvm::opt::ArgList &Args)
Mips Toolchain.
Definition: MipsLinux.cpp:27
bool findMIPSMultilibs(const Driver &D, const llvm::Triple &TargetTriple, StringRef Path, const llvm::opt::ArgList &Args, DetectedMultilibs &Result)
std::string findLibCxxIncludePath() const override
Definition: MipsLinux.cpp:97
MultilibSet Multilibs
The set of multilibs that the detected installation supports.
Definition: Gnu.h:23
std::string getMipsABILibSuffix(const llvm::opt::ArgList &Args, const llvm::Triple &Triple)
Multilib SelectedMultilib
The primary multilib appropriate for the given flags.
Definition: Gnu.h:26
std::string ResourceDir
The path to the compiler resource directory.
Definition: Driver.h:139