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authorDimitry Andric <dim@FreeBSD.org>2017-04-16 16:02:28 +0000
committerDimitry Andric <dim@FreeBSD.org>2017-04-16 16:02:28 +0000
commit7442d6faa2719e4e7d33a7021c406c5a4facd74d (patch)
treec72b9241553fc9966179aba84f90f17bfa9235c3 /lib/Driver/ToolChains/Linux.cpp
parentb52119637f743680a99710ce5fdb6646da2772af (diff)
downloadsrc-7442d6faa2719e4e7d33a7021c406c5a4facd74d.tar.gz
src-7442d6faa2719e4e7d33a7021c406c5a4facd74d.zip
Vendor import of clang trunk r300422:vendor/clang/clang-trunk-r300422
Notes
Notes: svn path=/vendor/clang/dist/; revision=317019 svn path=/vendor/clang/clang-trunk-r300422/; revision=317020; tag=vendor/clang/clang-trunk-r300422
Diffstat (limited to 'lib/Driver/ToolChains/Linux.cpp')
-rw-r--r--lib/Driver/ToolChains/Linux.cpp901
1 files changed, 901 insertions, 0 deletions
diff --git a/lib/Driver/ToolChains/Linux.cpp b/lib/Driver/ToolChains/Linux.cpp
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+//===--- 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 <system_error>
+
+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/<triple>' 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 <prefix>/<triple>/<libdir> rather than as
+ // any part of the GCC installation in
+ // <prefix>/<libdir>/gcc/<triple>/<version>. 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
+ // <prefix>/<triple>/<libdir> 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);
+}
+
+/// \brief Parse a GCCVersion object out of a string of text.
+///
+/// This is the primary means of forming GCCVersion objects.
+/*static*/
+Generic_GCC::GCCVersion Linux::GCCVersion::Parse(StringRef VersionText) {
+ const GCCVersion BadVersion = {VersionText.str(), -1, -1, -1, "", "", ""};
+ std::pair<StringRef, StringRef> First = VersionText.split('.');
+ std::pair<StringRef, StringRef> Second = First.second.split('.');
+
+ GCCVersion GoodVersion = {VersionText.str(), -1, -1, -1, "", "", ""};
+ if (First.first.getAsInteger(10, GoodVersion.Major) || GoodVersion.Major < 0)
+ return BadVersion;
+ GoodVersion.MajorStr = First.first.str();
+ if (First.second.empty())
+ return GoodVersion;
+ if (Second.first.getAsInteger(10, GoodVersion.Minor) || GoodVersion.Minor < 0)
+ return BadVersion;
+ GoodVersion.MinorStr = Second.first.str();
+
+ // First look for a number prefix and parse that if present. Otherwise just
+ // stash the entire patch string in the suffix, and leave the number
+ // unspecified. This covers versions strings such as:
+ // 5 (handled above)
+ // 4.4
+ // 4.4.0
+ // 4.4.x
+ // 4.4.2-rc4
+ // 4.4.x-patched
+ // And retains any patch number it finds.
+ StringRef PatchText = GoodVersion.PatchSuffix = Second.second.str();
+ if (!PatchText.empty()) {
+ if (size_t EndNumber = PatchText.find_first_not_of("0123456789")) {
+ // Try to parse the number and any suffix.
+ if (PatchText.slice(0, EndNumber).getAsInteger(10, GoodVersion.Patch) ||
+ GoodVersion.Patch < 0)
+ return BadVersion;
+ GoodVersion.PatchSuffix = PatchText.substr(EndNumber);
+ }
+ }
+
+ return GoodVersion;
+}
+
+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<StringRef, 5> 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<StringRef> 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 <sysroot>/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 ||
+ llvm::Triple::thumb || llvm::Triple::armeb ||
+ llvm::Triple::thumbeb;
+ SanitizerMask Res = ToolChain::getSupportedSanitizers();
+ Res |= SanitizerKind::Address;
+ 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);
+}