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 "clang/Driver/Driver.h"
12 #include "clang/Driver/Options.h"
13 #include "llvm/Option/ArgList.h"
14 #include "llvm/Support/FileSystem.h"
15 #include "llvm/Support/Path.h"
16
17 using namespace clang::driver;
18 using namespace clang::driver::toolchains;
19 using namespace clang;
20 using namespace llvm::opt;
21
22 /// Mips Toolchain
MipsLLVMToolChain(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)23 MipsLLVMToolChain::MipsLLVMToolChain(const Driver &D,
24 const llvm::Triple &Triple,
25 const ArgList &Args)
26 : Linux(D, Triple, Args) {
27 // Select the correct multilib according to the given arguments.
28 DetectedMultilibs Result;
29 findMIPSMultilibs(D, Triple, "", Args, Result);
30 Multilibs = Result.Multilibs;
31 SelectedMultilibs = Result.SelectedMultilibs;
32
33 // Find out the library suffix based on the ABI.
34 LibSuffix = tools::mips::getMipsABILibSuffix(Args, Triple);
35 getFilePaths().clear();
36 getFilePaths().push_back(computeSysRoot() + "/usr/lib" + LibSuffix);
37 }
38
AddClangSystemIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const39 void MipsLLVMToolChain::AddClangSystemIncludeArgs(
40 const ArgList &DriverArgs, ArgStringList &CC1Args) const {
41 if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
42 return;
43
44 const Driver &D = getDriver();
45
46 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
47 SmallString<128> P(D.ResourceDir);
48 llvm::sys::path::append(P, "include");
49 addSystemInclude(DriverArgs, CC1Args, P);
50 }
51
52 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
53 return;
54
55 const auto &Callback = Multilibs.includeDirsCallback();
56 if (Callback) {
57 for (const auto &Path : Callback(SelectedMultilibs.back()))
58 addExternCSystemIncludeIfExists(DriverArgs, CC1Args, D.Dir + Path);
59 }
60 }
61
buildLinker() const62 Tool *MipsLLVMToolChain::buildLinker() const {
63 return new tools::gnutools::Linker(*this);
64 }
65
computeSysRoot() const66 std::string MipsLLVMToolChain::computeSysRoot() const {
67 if (!getDriver().SysRoot.empty())
68 return getDriver().SysRoot + SelectedMultilibs.back().osSuffix();
69
70 const std::string InstalledDir(getDriver().Dir);
71 std::string SysRootPath =
72 InstalledDir + "/../sysroot" + SelectedMultilibs.back().osSuffix();
73 if (llvm::sys::fs::exists(SysRootPath))
74 return SysRootPath;
75
76 return std::string();
77 }
78
79 ToolChain::CXXStdlibType
GetCXXStdlibType(const ArgList & Args) const80 MipsLLVMToolChain::GetCXXStdlibType(const ArgList &Args) const {
81 Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
82 if (A) {
83 StringRef Value = A->getValue();
84 if (Value != "libc++")
85 getDriver().Diag(clang::diag::err_drv_invalid_stdlib_name)
86 << A->getAsString(Args);
87 }
88
89 return ToolChain::CST_Libcxx;
90 }
91
addLibCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const92 void MipsLLVMToolChain::addLibCxxIncludePaths(
93 const llvm::opt::ArgList &DriverArgs,
94 llvm::opt::ArgStringList &CC1Args) const {
95 if (const auto &Callback = Multilibs.includeDirsCallback()) {
96 for (std::string Path : Callback(SelectedMultilibs.back())) {
97 Path = getDriver().Dir + Path + "/c++/v1";
98 if (llvm::sys::fs::exists(Path)) {
99 addSystemInclude(DriverArgs, CC1Args, Path);
100 return;
101 }
102 }
103 }
104 }
105
AddCXXStdlibLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const106 void MipsLLVMToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
107 ArgStringList &CmdArgs) const {
108 assert((GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) &&
109 "Only -lc++ (aka libxx) is supported in this toolchain.");
110
111 CmdArgs.push_back("-lc++");
112 if (Args.hasArg(options::OPT_fexperimental_library))
113 CmdArgs.push_back("-lc++experimental");
114 CmdArgs.push_back("-lc++abi");
115 CmdArgs.push_back("-lunwind");
116 }
117
getCompilerRT(const ArgList & Args,StringRef Component,FileType Type,bool IsFortran) const118 std::string MipsLLVMToolChain::getCompilerRT(const ArgList &Args,
119 StringRef Component, FileType Type,
120 bool IsFortran) const {
121 SmallString<128> Path(getDriver().ResourceDir);
122 llvm::sys::path::append(Path, SelectedMultilibs.back().osSuffix(), "lib" + LibSuffix,
123 getOS());
124 const char *Suffix;
125 switch (Type) {
126 case ToolChain::FT_Object:
127 Suffix = ".o";
128 break;
129 case ToolChain::FT_Static:
130 Suffix = ".a";
131 break;
132 case ToolChain::FT_Shared:
133 Suffix = ".so";
134 break;
135 }
136 llvm::sys::path::append(
137 Path, Twine("libclang_rt." + Component + "-" + "mips" + Suffix));
138 return std::string(Path);
139 }
140