1 //===--- BaremMetal.cpp - Bare Metal ToolChain ------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "BareMetal.h"
12 #include "CommonArgs.h"
13 #include "InputInfo.h"
16 #include "clang/Basic/VirtualFileSystem.h"
17 #include "clang/Driver/Compilation.h"
18 #include "clang/Driver/Driver.h"
19 #include "clang/Driver/DriverDiagnostic.h"
20 #include "clang/Driver/Options.h"
21 #include "llvm/Option/ArgList.h"
22 #include "llvm/Support/Path.h"
23 #include "llvm/Support/raw_ostream.h"
25 using namespace llvm::opt;
26 using namespace clang;
27 using namespace clang::driver;
28 using namespace clang::driver::tools;
29 using namespace clang::driver::toolchains;
31 BareMetal::BareMetal(const Driver &D, const llvm::Triple &Triple,
33 : ToolChain(D, Triple, Args) {
34 getProgramPaths().push_back(getDriver().getInstalledDir());
35 if (getDriver().getInstalledDir() != getDriver().Dir)
36 getProgramPaths().push_back(getDriver().Dir);
39 BareMetal::~BareMetal() {}
41 /// Is the triple {arm,thumb}-none-none-{eabi,eabihf} ?
42 static bool isARMBareMetal(const llvm::Triple &Triple) {
43 if (Triple.getArch() != llvm::Triple::arm &&
44 Triple.getArch() != llvm::Triple::thumb)
47 if (Triple.getVendor() != llvm::Triple::UnknownVendor)
50 if (Triple.getOS() != llvm::Triple::UnknownOS)
53 if (Triple.getEnvironment() != llvm::Triple::EABI &&
54 Triple.getEnvironment() != llvm::Triple::EABIHF)
60 bool BareMetal::handlesTarget(const llvm::Triple &Triple) {
61 return isARMBareMetal(Triple);
64 Tool *BareMetal::buildLinker() const {
65 return new tools::baremetal::Linker(*this);
68 std::string BareMetal::getRuntimesDir() const {
69 SmallString<128> Dir(getDriver().ResourceDir);
70 llvm::sys::path::append(Dir, "lib", "baremetal");
74 void BareMetal::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
75 ArgStringList &CC1Args) const {
76 if (DriverArgs.hasArg(options::OPT_nostdinc))
79 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
80 SmallString<128> Dir(getDriver().ResourceDir);
81 llvm::sys::path::append(Dir, "include");
82 addSystemInclude(DriverArgs, CC1Args, Dir.str());
85 if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
86 SmallString<128> Dir(getDriver().SysRoot);
87 llvm::sys::path::append(Dir, "include");
88 addSystemInclude(DriverArgs, CC1Args, Dir.str());
92 void BareMetal::addClangTargetOptions(const ArgList &DriverArgs,
93 ArgStringList &CC1Args,
94 Action::OffloadKind) const {
95 CC1Args.push_back("-nostdsysteminc");
98 void BareMetal::AddClangCXXStdlibIncludeArgs(
99 const ArgList &DriverArgs, ArgStringList &CC1Args) const {
100 if (DriverArgs.hasArg(options::OPT_nostdinc) ||
101 DriverArgs.hasArg(options::OPT_nostdlibinc) ||
102 DriverArgs.hasArg(options::OPT_nostdincxx))
105 StringRef SysRoot = getDriver().SysRoot;
109 switch (GetCXXStdlibType(DriverArgs)) {
110 case ToolChain::CST_Libcxx: {
111 SmallString<128> Dir(SysRoot);
112 llvm::sys::path::append(Dir, "include", "c++", "v1");
113 addSystemInclude(DriverArgs, CC1Args, Dir.str());
116 case ToolChain::CST_Libstdcxx: {
117 SmallString<128> Dir(SysRoot);
118 llvm::sys::path::append(Dir, "include", "c++");
120 Generic_GCC::GCCVersion Version = {"", -1, -1, -1, "", "", ""};
121 // Walk the subdirs, and find the one with the newest gcc version:
122 for (vfs::directory_iterator LI =
123 getDriver().getVFS().dir_begin(Dir.str(), EC), LE;
124 !EC && LI != LE; LI = LI.increment(EC)) {
125 StringRef VersionText = llvm::sys::path::filename(LI->getName());
126 auto CandidateVersion = Generic_GCC::GCCVersion::Parse(VersionText);
127 if (CandidateVersion.Major == -1)
129 if (CandidateVersion <= Version)
131 Version = CandidateVersion;
133 if (Version.Major == -1)
135 llvm::sys::path::append(Dir, Version.Text);
136 addSystemInclude(DriverArgs, CC1Args, Dir.str());
142 void BareMetal::AddCXXStdlibLibArgs(const ArgList &Args,
143 ArgStringList &CmdArgs) const {
144 switch (GetCXXStdlibType(Args)) {
145 case ToolChain::CST_Libcxx:
146 CmdArgs.push_back("-lc++");
147 CmdArgs.push_back("-lc++abi");
149 case ToolChain::CST_Libstdcxx:
150 CmdArgs.push_back("-lstdc++");
151 CmdArgs.push_back("-lsupc++");
154 CmdArgs.push_back("-lunwind");
157 void BareMetal::AddLinkRuntimeLib(const ArgList &Args,
158 ArgStringList &CmdArgs) const {
159 CmdArgs.push_back(Args.MakeArgString("-lclang_rt.builtins-" +
160 getTriple().getArchName() + ".a"));
163 void baremetal::Linker::ConstructJob(Compilation &C, const JobAction &JA,
164 const InputInfo &Output,
165 const InputInfoList &Inputs,
167 const char *LinkingOutput) const {
168 ArgStringList CmdArgs;
170 auto &TC = static_cast<const toolchains::BareMetal&>(getToolChain());
172 AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
174 CmdArgs.push_back("-Bstatic");
176 CmdArgs.push_back(Args.MakeArgString("-L" + TC.getRuntimesDir()));
178 Args.AddAllArgs(CmdArgs, {options::OPT_L, options::OPT_T_Group,
179 options::OPT_e, options::OPT_s, options::OPT_t,
180 options::OPT_Z_Flag, options::OPT_r});
182 if (TC.ShouldLinkCXXStdlib(Args))
183 TC.AddCXXStdlibLibArgs(Args, CmdArgs);
184 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
185 CmdArgs.push_back("-lc");
186 CmdArgs.push_back("-lm");
188 TC.AddLinkRuntimeLib(Args, CmdArgs);
191 CmdArgs.push_back("-o");
192 CmdArgs.push_back(Output.getFilename());
194 C.addCommand(llvm::make_unique<Command>(JA, *this,
195 Args.MakeArgString(TC.GetLinkerPath()),