//===--- Linux.h - Linux ToolChain Implementations --------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "Linux.h" #include "Arch/ARM.h" #include "Arch/Mips.h" #include "Arch/PPC.h" #include "CommonArgs.h" #include "clang/Basic/VirtualFileSystem.h" #include "clang/Config/config.h" #include "clang/Driver/Distro.h" #include "clang/Driver/Driver.h" #include "clang/Driver/Options.h" #include "clang/Driver/SanitizerArgs.h" #include "llvm/Option/ArgList.h" #include "llvm/ProfileData/InstrProf.h" #include "llvm/Support/Path.h" #include using namespace clang::driver; using namespace clang::driver::toolchains; using namespace clang; using namespace llvm::opt; using tools::addPathIfExists; /// \brief Get our best guess at the multiarch triple for a target. /// /// Debian-based systems are starting to use a multiarch setup where they use /// a target-triple directory in the library and header search paths. /// Unfortunately, this triple does not align with the vanilla target triple, /// so we provide a rough mapping here. static std::string getMultiarchTriple(const Driver &D, const llvm::Triple &TargetTriple, StringRef SysRoot) { llvm::Triple::EnvironmentType TargetEnvironment = TargetTriple.getEnvironment(); // For most architectures, just use whatever we have rather than trying to be // clever. switch (TargetTriple.getArch()) { default: break; // We use the existence of '/lib/' as a directory to detect some // common linux triples that don't quite match the Clang triple for both // 32-bit and 64-bit targets. Multiarch fixes its install triples to these // regardless of what the actual target triple is. case llvm::Triple::arm: case llvm::Triple::thumb: if (TargetEnvironment == llvm::Triple::GNUEABIHF) { if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabihf")) return "arm-linux-gnueabihf"; } else { if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabi")) return "arm-linux-gnueabi"; } break; case llvm::Triple::armeb: case llvm::Triple::thumbeb: if (TargetEnvironment == llvm::Triple::GNUEABIHF) { if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabihf")) return "armeb-linux-gnueabihf"; } else { if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabi")) return "armeb-linux-gnueabi"; } break; case llvm::Triple::x86: if (D.getVFS().exists(SysRoot + "/lib/i386-linux-gnu")) return "i386-linux-gnu"; break; case llvm::Triple::x86_64: // We don't want this for x32, otherwise it will match x86_64 libs if (TargetEnvironment != llvm::Triple::GNUX32 && D.getVFS().exists(SysRoot + "/lib/x86_64-linux-gnu")) return "x86_64-linux-gnu"; break; case llvm::Triple::aarch64: if (D.getVFS().exists(SysRoot + "/lib/aarch64-linux-gnu")) return "aarch64-linux-gnu"; break; case llvm::Triple::aarch64_be: if (D.getVFS().exists(SysRoot + "/lib/aarch64_be-linux-gnu")) return "aarch64_be-linux-gnu"; break; case llvm::Triple::mips: if (D.getVFS().exists(SysRoot + "/lib/mips-linux-gnu")) return "mips-linux-gnu"; break; case llvm::Triple::mipsel: if (D.getVFS().exists(SysRoot + "/lib/mipsel-linux-gnu")) return "mipsel-linux-gnu"; break; case llvm::Triple::mips64: if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnu")) return "mips64-linux-gnu"; if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnuabi64")) return "mips64-linux-gnuabi64"; break; case llvm::Triple::mips64el: if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnu")) return "mips64el-linux-gnu"; if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnuabi64")) return "mips64el-linux-gnuabi64"; break; case llvm::Triple::ppc: if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnuspe")) return "powerpc-linux-gnuspe"; if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnu")) return "powerpc-linux-gnu"; break; case llvm::Triple::ppc64: if (D.getVFS().exists(SysRoot + "/lib/powerpc64-linux-gnu")) return "powerpc64-linux-gnu"; break; case llvm::Triple::ppc64le: if (D.getVFS().exists(SysRoot + "/lib/powerpc64le-linux-gnu")) return "powerpc64le-linux-gnu"; break; case llvm::Triple::sparc: if (D.getVFS().exists(SysRoot + "/lib/sparc-linux-gnu")) return "sparc-linux-gnu"; break; case llvm::Triple::sparcv9: if (D.getVFS().exists(SysRoot + "/lib/sparc64-linux-gnu")) return "sparc64-linux-gnu"; break; case llvm::Triple::systemz: if (D.getVFS().exists(SysRoot + "/lib/s390x-linux-gnu")) return "s390x-linux-gnu"; break; } return TargetTriple.str(); } static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args) { if (tools::isMipsArch(Triple.getArch())) { if (Triple.isAndroid()) { StringRef CPUName; StringRef ABIName; tools::mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName); if (CPUName == "mips32r6") return "libr6"; if (CPUName == "mips32r2") return "libr2"; } // lib32 directory has a special meaning on MIPS targets. // It contains N32 ABI binaries. Use this folder if produce // code for N32 ABI only. if (tools::mips::hasMipsAbiArg(Args, "n32")) return "lib32"; return Triple.isArch32Bit() ? "lib" : "lib64"; } // It happens that only x86 and PPC use the 'lib32' variant of oslibdir, and // using that variant while targeting other architectures causes problems // because the libraries are laid out in shared system roots that can't cope // with a 'lib32' library search path being considered. So we only enable // them when we know we may need it. // // FIXME: This is a bit of a hack. We should really unify this code for // reasoning about oslibdir spellings with the lib dir spellings in the // GCCInstallationDetector, but that is a more significant refactoring. if (Triple.getArch() == llvm::Triple::x86 || Triple.getArch() == llvm::Triple::ppc) return "lib32"; if (Triple.getArch() == llvm::Triple::x86_64 && Triple.getEnvironment() == llvm::Triple::GNUX32) return "libx32"; return Triple.isArch32Bit() ? "lib" : "lib64"; } static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs, const Multilib &Multilib, StringRef InstallPath, ToolChain::path_list &Paths) { if (const auto &PathsCallback = Multilibs.filePathsCallback()) for (const auto &Path : PathsCallback(Multilib)) addPathIfExists(D, InstallPath + Path, Paths); } Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) : Generic_ELF(D, Triple, Args) { GCCInstallation.init(Triple, Args); Multilibs = GCCInstallation.getMultilibs(); llvm::Triple::ArchType Arch = Triple.getArch(); std::string SysRoot = computeSysRoot(); // Cross-compiling binutils and GCC installations (vanilla and openSUSE at // least) put various tools in a triple-prefixed directory off of the parent // of the GCC installation. We use the GCC triple here to ensure that we end // up with tools that support the same amount of cross compiling as the // detected GCC installation. For example, if we find a GCC installation // targeting x86_64, but it is a bi-arch GCC installation, it can also be // used to target i386. // FIXME: This seems unlikely to be Linux-specific. ToolChain::path_list &PPaths = getProgramPaths(); PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" + GCCInstallation.getTriple().str() + "/bin") .str()); Distro Distro(D.getVFS()); if (Distro.IsOpenSUSE() || Distro.IsUbuntu()) { ExtraOpts.push_back("-z"); ExtraOpts.push_back("relro"); } if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb) ExtraOpts.push_back("-X"); const bool IsAndroid = Triple.isAndroid(); const bool IsMips = tools::isMipsArch(Arch); const bool IsHexagon = Arch == llvm::Triple::hexagon; if (IsMips && !SysRoot.empty()) ExtraOpts.push_back("--sysroot=" + SysRoot); // Do not use 'gnu' hash style for Mips targets because .gnu.hash // and the MIPS ABI require .dynsym to be sorted in different ways. // .gnu.hash needs symbols to be grouped by hash code whereas the MIPS // ABI requires a mapping between the GOT and the symbol table. // Android loader does not support .gnu.hash. // Hexagon linker/loader does not support .gnu.hash if (!IsMips && !IsAndroid && !IsHexagon) { if (Distro.IsRedhat() || Distro.IsOpenSUSE() || (Distro.IsUbuntu() && Distro >= Distro::UbuntuMaverick)) ExtraOpts.push_back("--hash-style=gnu"); if (Distro.IsDebian() || Distro.IsOpenSUSE() || Distro == Distro::UbuntuLucid || Distro == Distro::UbuntuJaunty || Distro == Distro::UbuntuKarmic) ExtraOpts.push_back("--hash-style=both"); } if (Distro.IsRedhat() && Distro != Distro::RHEL5 && Distro != Distro::RHEL6) ExtraOpts.push_back("--no-add-needed"); #ifdef ENABLE_LINKER_BUILD_ID ExtraOpts.push_back("--build-id"); #endif if (Distro.IsOpenSUSE()) ExtraOpts.push_back("--enable-new-dtags"); // The selection of paths to try here is designed to match the patterns which // the GCC driver itself uses, as this is part of the GCC-compatible driver. // This was determined by running GCC in a fake filesystem, creating all // possible permutations of these directories, and seeing which ones it added // to the link paths. path_list &Paths = getFilePaths(); const std::string OSLibDir = getOSLibDir(Triple, Args); const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot); // Add the multilib suffixed paths where they are available. if (GCCInstallation.isValid()) { const llvm::Triple &GCCTriple = GCCInstallation.getTriple(); const std::string &LibPath = GCCInstallation.getParentLibPath(); const Multilib &Multilib = GCCInstallation.getMultilib(); const MultilibSet &Multilibs = GCCInstallation.getMultilibs(); // Add toolchain / multilib specific file paths. addMultilibsFilePaths(D, Multilibs, Multilib, GCCInstallation.getInstallPath(), Paths); // Sourcery CodeBench MIPS toolchain holds some libraries under // a biarch-like suffix of the GCC installation. addPathIfExists(D, GCCInstallation.getInstallPath() + Multilib.gccSuffix(), Paths); // GCC cross compiling toolchains will install target libraries which ship // as part of the toolchain under // rather than as // any part of the GCC installation in // //gcc//. This decision is somewhat // debatable, but is the reality today. We need to search this tree even // when we have a sysroot somewhere else. It is the responsibility of // whomever is doing the cross build targeting a sysroot using a GCC // installation that is *not* within the system root to ensure two things: // // 1) Any DSOs that are linked in from this tree or from the install path // above must be present on the system root and found via an // appropriate rpath. // 2) There must not be libraries installed into // // unless they should be preferred over // those within the system root. // // Note that this matches the GCC behavior. See the below comment for where // Clang diverges from GCC's behavior. addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" + OSLibDir + Multilib.osSuffix(), Paths); // If the GCC installation we found is inside of the sysroot, we want to // prefer libraries installed in the parent prefix of the GCC installation. // It is important to *not* use these paths when the GCC installation is // outside of the system root as that can pick up unintended libraries. // This usually happens when there is an external cross compiler on the // host system, and a more minimal sysroot available that is the target of // the cross. Note that GCC does include some of these directories in some // configurations but this seems somewhere between questionable and simply // a bug. if (StringRef(LibPath).startswith(SysRoot)) { addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths); addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths); } } // Similar to the logic for GCC above, if we currently running Clang inside // of the requested system root, add its parent library paths to // those searched. // FIXME: It's not clear whether we should use the driver's installed // directory ('Dir' below) or the ResourceDir. if (StringRef(D.Dir).startswith(SysRoot)) { addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths); addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths); } addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths); addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths); addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths); addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths); // Try walking via the GCC triple path in case of biarch or multiarch GCC // installations with strange symlinks. if (GCCInstallation.isValid()) { addPathIfExists(D, SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() + "/../../" + OSLibDir, Paths); // Add the 'other' biarch variant path Multilib BiarchSibling; if (GCCInstallation.getBiarchSibling(BiarchSibling)) { addPathIfExists(D, GCCInstallation.getInstallPath() + BiarchSibling.gccSuffix(), Paths); } // See comments above on the multilib variant for details of why this is // included even from outside the sysroot. const std::string &LibPath = GCCInstallation.getParentLibPath(); const llvm::Triple &GCCTriple = GCCInstallation.getTriple(); const Multilib &Multilib = GCCInstallation.getMultilib(); addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" + Multilib.osSuffix(), Paths); // See comments above on the multilib variant for details of why this is // only included from within the sysroot. if (StringRef(LibPath).startswith(SysRoot)) addPathIfExists(D, LibPath, Paths); } // Similar to the logic for GCC above, if we are currently running Clang // inside of the requested system root, add its parent library path to those // searched. // FIXME: It's not clear whether we should use the driver's installed // directory ('Dir' below) or the ResourceDir. if (StringRef(D.Dir).startswith(SysRoot)) addPathIfExists(D, D.Dir + "/../lib", Paths); addPathIfExists(D, SysRoot + "/lib", Paths); addPathIfExists(D, SysRoot + "/usr/lib", Paths); } bool Linux::HasNativeLLVMSupport() const { return true; } Tool *Linux::buildLinker() const { return new tools::gnutools::Linker(*this); } Tool *Linux::buildAssembler() const { return new tools::gnutools::Assembler(*this); } std::string Linux::computeSysRoot() const { if (!getDriver().SysRoot.empty()) return getDriver().SysRoot; if (!GCCInstallation.isValid() || !tools::isMipsArch(getTriple().getArch())) return std::string(); // Standalone MIPS toolchains use different names for sysroot folder // and put it into different places. Here we try to check some known // variants. const StringRef InstallDir = GCCInstallation.getInstallPath(); const StringRef TripleStr = GCCInstallation.getTriple().str(); const Multilib &Multilib = GCCInstallation.getMultilib(); std::string Path = (InstallDir + "/../../../../" + TripleStr + "/libc" + Multilib.osSuffix()) .str(); if (getVFS().exists(Path)) return Path; Path = (InstallDir + "/../../../../sysroot" + Multilib.osSuffix()).str(); if (getVFS().exists(Path)) return Path; return std::string(); } std::string Linux::getDynamicLinker(const ArgList &Args) const { const llvm::Triple::ArchType Arch = getArch(); const llvm::Triple &Triple = getTriple(); const Distro Distro(getDriver().getVFS()); if (Triple.isAndroid()) return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker"; if (Triple.isMusl()) { std::string ArchName; bool IsArm = false; switch (Arch) { case llvm::Triple::arm: case llvm::Triple::thumb: ArchName = "arm"; IsArm = true; break; case llvm::Triple::armeb: case llvm::Triple::thumbeb: ArchName = "armeb"; IsArm = true; break; default: ArchName = Triple.getArchName().str(); } if (IsArm && (Triple.getEnvironment() == llvm::Triple::MuslEABIHF || tools::arm::getARMFloatABI(*this, Args) == tools::arm::FloatABI::Hard)) ArchName += "hf"; return "/lib/ld-musl-" + ArchName + ".so.1"; } std::string LibDir; std::string Loader; switch (Arch) { default: llvm_unreachable("unsupported architecture"); case llvm::Triple::aarch64: LibDir = "lib"; Loader = "ld-linux-aarch64.so.1"; break; case llvm::Triple::aarch64_be: LibDir = "lib"; Loader = "ld-linux-aarch64_be.so.1"; break; case llvm::Triple::arm: case llvm::Triple::thumb: case llvm::Triple::armeb: case llvm::Triple::thumbeb: { const bool HF = Triple.getEnvironment() == llvm::Triple::GNUEABIHF || tools::arm::getARMFloatABI(*this, Args) == tools::arm::FloatABI::Hard; LibDir = "lib"; Loader = HF ? "ld-linux-armhf.so.3" : "ld-linux.so.3"; break; } case llvm::Triple::mips: case llvm::Triple::mipsel: case llvm::Triple::mips64: case llvm::Triple::mips64el: { bool LE = (Triple.getArch() == llvm::Triple::mipsel) || (Triple.getArch() == llvm::Triple::mips64el); bool IsNaN2008 = tools::mips::isNaN2008(Args, Triple); LibDir = "lib" + tools::mips::getMipsABILibSuffix(Args, Triple); if (tools::mips::isUCLibc(Args)) Loader = IsNaN2008 ? "ld-uClibc-mipsn8.so.0" : "ld-uClibc.so.0"; else if (!Triple.hasEnvironment() && Triple.getVendor() == llvm::Triple::VendorType::MipsTechnologies) Loader = LE ? "ld-musl-mipsel.so.1" : "ld-musl-mips.so.1"; else Loader = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1"; break; } case llvm::Triple::ppc: LibDir = "lib"; Loader = "ld.so.1"; break; case llvm::Triple::ppc64: LibDir = "lib64"; Loader = (tools::ppc::hasPPCAbiArg(Args, "elfv2")) ? "ld64.so.2" : "ld64.so.1"; break; case llvm::Triple::ppc64le: LibDir = "lib64"; Loader = (tools::ppc::hasPPCAbiArg(Args, "elfv1")) ? "ld64.so.1" : "ld64.so.2"; break; case llvm::Triple::sparc: case llvm::Triple::sparcel: LibDir = "lib"; Loader = "ld-linux.so.2"; break; case llvm::Triple::sparcv9: LibDir = "lib64"; Loader = "ld-linux.so.2"; break; case llvm::Triple::systemz: LibDir = "lib"; Loader = "ld64.so.1"; break; case llvm::Triple::x86: LibDir = "lib"; Loader = "ld-linux.so.2"; break; case llvm::Triple::x86_64: { bool X32 = Triple.getEnvironment() == llvm::Triple::GNUX32; LibDir = X32 ? "libx32" : "lib64"; Loader = X32 ? "ld-linux-x32.so.2" : "ld-linux-x86-64.so.2"; break; } } if (Distro == Distro::Exherbo && (Triple.getVendor() == llvm::Triple::UnknownVendor || Triple.getVendor() == llvm::Triple::PC)) return "/usr/" + Triple.str() + "/lib/" + Loader; return "/" + LibDir + "/" + Loader; } void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs, ArgStringList &CC1Args) const { const Driver &D = getDriver(); std::string SysRoot = computeSysRoot(); if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc)) return; if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include"); if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { SmallString<128> P(D.ResourceDir); llvm::sys::path::append(P, "include"); addSystemInclude(DriverArgs, CC1Args, P); } if (DriverArgs.hasArg(options::OPT_nostdlibinc)) return; // Check for configure-time C include directories. StringRef CIncludeDirs(C_INCLUDE_DIRS); if (CIncludeDirs != "") { SmallVector dirs; CIncludeDirs.split(dirs, ":"); for (StringRef dir : dirs) { StringRef Prefix = llvm::sys::path::is_absolute(dir) ? StringRef(SysRoot) : ""; addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir); } return; } // Lacking those, try to detect the correct set of system includes for the // target triple. // Add include directories specific to the selected multilib set and multilib. if (GCCInstallation.isValid()) { const auto &Callback = Multilibs.includeDirsCallback(); if (Callback) { for (const auto &Path : Callback(GCCInstallation.getMultilib())) addExternCSystemIncludeIfExists( DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path); } } // Implement generic Debian multiarch support. const StringRef X86_64MultiarchIncludeDirs[] = { "/usr/include/x86_64-linux-gnu", // FIXME: These are older forms of multiarch. It's not clear that they're // in use in any released version of Debian, so we should consider // removing them. "/usr/include/i686-linux-gnu/64", "/usr/include/i486-linux-gnu/64"}; const StringRef X86MultiarchIncludeDirs[] = { "/usr/include/i386-linux-gnu", // FIXME: These are older forms of multiarch. It's not clear that they're // in use in any released version of Debian, so we should consider // removing them. "/usr/include/x86_64-linux-gnu/32", "/usr/include/i686-linux-gnu", "/usr/include/i486-linux-gnu"}; const StringRef AArch64MultiarchIncludeDirs[] = { "/usr/include/aarch64-linux-gnu"}; const StringRef ARMMultiarchIncludeDirs[] = { "/usr/include/arm-linux-gnueabi"}; const StringRef ARMHFMultiarchIncludeDirs[] = { "/usr/include/arm-linux-gnueabihf"}; const StringRef ARMEBMultiarchIncludeDirs[] = { "/usr/include/armeb-linux-gnueabi"}; const StringRef ARMEBHFMultiarchIncludeDirs[] = { "/usr/include/armeb-linux-gnueabihf"}; const StringRef MIPSMultiarchIncludeDirs[] = {"/usr/include/mips-linux-gnu"}; const StringRef MIPSELMultiarchIncludeDirs[] = { "/usr/include/mipsel-linux-gnu"}; const StringRef MIPS64MultiarchIncludeDirs[] = { "/usr/include/mips64-linux-gnu", "/usr/include/mips64-linux-gnuabi64"}; const StringRef MIPS64ELMultiarchIncludeDirs[] = { "/usr/include/mips64el-linux-gnu", "/usr/include/mips64el-linux-gnuabi64"}; const StringRef PPCMultiarchIncludeDirs[] = { "/usr/include/powerpc-linux-gnu"}; const StringRef PPC64MultiarchIncludeDirs[] = { "/usr/include/powerpc64-linux-gnu"}; const StringRef PPC64LEMultiarchIncludeDirs[] = { "/usr/include/powerpc64le-linux-gnu"}; const StringRef SparcMultiarchIncludeDirs[] = { "/usr/include/sparc-linux-gnu"}; const StringRef Sparc64MultiarchIncludeDirs[] = { "/usr/include/sparc64-linux-gnu"}; const StringRef SYSTEMZMultiarchIncludeDirs[] = { "/usr/include/s390x-linux-gnu"}; ArrayRef MultiarchIncludeDirs; switch (getTriple().getArch()) { case llvm::Triple::x86_64: MultiarchIncludeDirs = X86_64MultiarchIncludeDirs; break; case llvm::Triple::x86: MultiarchIncludeDirs = X86MultiarchIncludeDirs; break; case llvm::Triple::aarch64: case llvm::Triple::aarch64_be: MultiarchIncludeDirs = AArch64MultiarchIncludeDirs; break; case llvm::Triple::arm: case llvm::Triple::thumb: if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF) MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs; else MultiarchIncludeDirs = ARMMultiarchIncludeDirs; break; case llvm::Triple::armeb: case llvm::Triple::thumbeb: if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF) MultiarchIncludeDirs = ARMEBHFMultiarchIncludeDirs; else MultiarchIncludeDirs = ARMEBMultiarchIncludeDirs; break; case llvm::Triple::mips: MultiarchIncludeDirs = MIPSMultiarchIncludeDirs; break; case llvm::Triple::mipsel: MultiarchIncludeDirs = MIPSELMultiarchIncludeDirs; break; case llvm::Triple::mips64: MultiarchIncludeDirs = MIPS64MultiarchIncludeDirs; break; case llvm::Triple::mips64el: MultiarchIncludeDirs = MIPS64ELMultiarchIncludeDirs; break; case llvm::Triple::ppc: MultiarchIncludeDirs = PPCMultiarchIncludeDirs; break; case llvm::Triple::ppc64: MultiarchIncludeDirs = PPC64MultiarchIncludeDirs; break; case llvm::Triple::ppc64le: MultiarchIncludeDirs = PPC64LEMultiarchIncludeDirs; break; case llvm::Triple::sparc: MultiarchIncludeDirs = SparcMultiarchIncludeDirs; break; case llvm::Triple::sparcv9: MultiarchIncludeDirs = Sparc64MultiarchIncludeDirs; break; case llvm::Triple::systemz: MultiarchIncludeDirs = SYSTEMZMultiarchIncludeDirs; break; default: break; } for (StringRef Dir : MultiarchIncludeDirs) { if (D.getVFS().exists(SysRoot + Dir)) { addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + Dir); break; } } if (getTriple().getOS() == llvm::Triple::RTEMS) return; // Add an include of '/include' directly. This isn't provided by default by // system GCCs, but is often used with cross-compiling GCCs, and harmless to // add even when Clang is acting as-if it were a system compiler. addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include"); addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include"); } static std::string DetectLibcxxIncludePath(StringRef base) { std::error_code EC; int MaxVersion = 0; std::string MaxVersionString = ""; for (llvm::sys::fs::directory_iterator LI(base, EC), LE; !EC && LI != LE; LI = LI.increment(EC)) { StringRef VersionText = llvm::sys::path::filename(LI->path()); int Version; if (VersionText[0] == 'v' && !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) { if (Version > MaxVersion) { MaxVersion = Version; MaxVersionString = VersionText; } } } return MaxVersion ? (base + "/" + MaxVersionString).str() : ""; } std::string Linux::findLibCxxIncludePath() const { const std::string LibCXXIncludePathCandidates[] = { DetectLibcxxIncludePath(getDriver().Dir + "/../include/c++"), // If this is a development, non-installed, clang, libcxx will // not be found at ../include/c++ but it likely to be found at // one of the following two locations: DetectLibcxxIncludePath(getDriver().SysRoot + "/usr/local/include/c++"), DetectLibcxxIncludePath(getDriver().SysRoot + "/usr/include/c++") }; for (const auto &IncludePath : LibCXXIncludePathCandidates) { if (IncludePath.empty() || !getVFS().exists(IncludePath)) continue; // Use the first candidate that exists. return IncludePath; } return ""; } void Linux::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const { // We need a detected GCC installation on Linux to provide libstdc++'s // headers. if (!GCCInstallation.isValid()) return; // By default, look for the C++ headers in an include directory adjacent to // the lib directory of the GCC installation. Note that this is expect to be // equivalent to '/usr/include/c++/X.Y' in almost all cases. StringRef LibDir = GCCInstallation.getParentLibPath(); StringRef InstallDir = GCCInstallation.getInstallPath(); StringRef TripleStr = GCCInstallation.getTriple().str(); const Multilib &Multilib = GCCInstallation.getMultilib(); const std::string GCCMultiarchTriple = getMultiarchTriple( getDriver(), GCCInstallation.getTriple(), getDriver().SysRoot); const std::string TargetMultiarchTriple = getMultiarchTriple(getDriver(), getTriple(), getDriver().SysRoot); const GCCVersion &Version = GCCInstallation.getVersion(); // The primary search for libstdc++ supports multiarch variants. if (addLibStdCXXIncludePaths(LibDir.str() + "/../include", "/c++/" + Version.Text, TripleStr, GCCMultiarchTriple, TargetMultiarchTriple, Multilib.includeSuffix(), DriverArgs, CC1Args)) return; // Otherwise, fall back on a bunch of options which don't use multiarch // layouts for simplicity. const std::string LibStdCXXIncludePathCandidates[] = { // Gentoo is weird and places its headers inside the GCC install, // so if the first attempt to find the headers fails, try these patterns. InstallDir.str() + "/include/g++-v" + Version.Text, InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." + Version.MinorStr, InstallDir.str() + "/include/g++-v" + Version.MajorStr, // Android standalone toolchain has C++ headers in yet another place. LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text, // Freescale SDK C++ headers are directly in /usr/include/c++, // without a subdirectory corresponding to the gcc version. LibDir.str() + "/../include/c++", }; for (const auto &IncludePath : LibStdCXXIncludePathCandidates) { if (addLibStdCXXIncludePaths(IncludePath, /*Suffix*/ "", TripleStr, /*GCCMultiarchTriple*/ "", /*TargetMultiarchTriple*/ "", Multilib.includeSuffix(), DriverArgs, CC1Args)) break; } } void Linux::AddCudaIncludeArgs(const ArgList &DriverArgs, ArgStringList &CC1Args) const { CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args); } void Linux::AddIAMCUIncludeArgs(const ArgList &DriverArgs, ArgStringList &CC1Args) const { if (GCCInstallation.isValid()) { CC1Args.push_back("-isystem"); CC1Args.push_back(DriverArgs.MakeArgString( GCCInstallation.getParentLibPath() + "/../" + GCCInstallation.getTriple().str() + "/include")); } } bool Linux::isPIEDefault() const { return getSanitizerArgs().requiresPIE(); } SanitizerMask Linux::getSupportedSanitizers() const { const bool IsX86 = getTriple().getArch() == llvm::Triple::x86; const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64; const bool IsMIPS64 = getTriple().getArch() == llvm::Triple::mips64 || getTriple().getArch() == llvm::Triple::mips64el; const bool IsPowerPC64 = getTriple().getArch() == llvm::Triple::ppc64 || getTriple().getArch() == llvm::Triple::ppc64le; const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64 || getTriple().getArch() == llvm::Triple::aarch64_be; const bool IsArmArch = getTriple().getArch() == llvm::Triple::arm || getTriple().getArch() == llvm::Triple::thumb || getTriple().getArch() == llvm::Triple::armeb || getTriple().getArch() == llvm::Triple::thumbeb; SanitizerMask Res = ToolChain::getSupportedSanitizers(); Res |= SanitizerKind::Address; Res |= SanitizerKind::Fuzzer; Res |= SanitizerKind::KernelAddress; Res |= SanitizerKind::Vptr; Res |= SanitizerKind::SafeStack; if (IsX86_64 || IsMIPS64 || IsAArch64) Res |= SanitizerKind::DataFlow; if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsArmArch) Res |= SanitizerKind::Leak; if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64) Res |= SanitizerKind::Thread; if (IsX86_64 || IsMIPS64 || IsPowerPC64 || IsAArch64) Res |= SanitizerKind::Memory; if (IsX86_64 || IsMIPS64) Res |= SanitizerKind::Efficiency; if (IsX86 || IsX86_64) { Res |= SanitizerKind::Function; } return Res; } void Linux::addProfileRTLibs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const { if (!needsProfileRT(Args)) return; // Add linker option -u__llvm_runtime_variable to cause runtime // initialization module to be linked in. if (!Args.hasArg(options::OPT_coverage)) CmdArgs.push_back(Args.MakeArgString( Twine("-u", llvm::getInstrProfRuntimeHookVarName()))); ToolChain::addProfileRTLibs(Args, CmdArgs); }