forked from OSchip/llvm-project
861 lines
33 KiB
C++
861 lines
33 KiB
C++
//===--- Linux.h - Linux ToolChain Implementations --------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "Linux.h"
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#include "Arch/ARM.h"
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#include "Arch/Mips.h"
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#include "Arch/PPC.h"
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#include "CommonArgs.h"
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#include "clang/Basic/VirtualFileSystem.h"
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#include "clang/Config/config.h"
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#include "clang/Driver/Distro.h"
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#include "clang/Driver/Driver.h"
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#include "clang/Driver/Options.h"
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#include "clang/Driver/SanitizerArgs.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/ProfileData/InstrProf.h"
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#include "llvm/Support/Path.h"
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#include <system_error>
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using namespace clang::driver;
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using namespace clang::driver::toolchains;
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using namespace clang;
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using namespace llvm::opt;
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using tools::addPathIfExists;
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/// \brief Get our best guess at the multiarch triple for a target.
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///
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/// Debian-based systems are starting to use a multiarch setup where they use
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/// a target-triple directory in the library and header search paths.
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/// Unfortunately, this triple does not align with the vanilla target triple,
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/// so we provide a rough mapping here.
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static std::string getMultiarchTriple(const Driver &D,
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const llvm::Triple &TargetTriple,
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StringRef SysRoot) {
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llvm::Triple::EnvironmentType TargetEnvironment =
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TargetTriple.getEnvironment();
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// For most architectures, just use whatever we have rather than trying to be
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// clever.
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switch (TargetTriple.getArch()) {
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default:
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break;
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// We use the existence of '/lib/<triple>' as a directory to detect some
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// common linux triples that don't quite match the Clang triple for both
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// 32-bit and 64-bit targets. Multiarch fixes its install triples to these
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// regardless of what the actual target triple is.
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case llvm::Triple::arm:
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case llvm::Triple::thumb:
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if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
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if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabihf"))
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return "arm-linux-gnueabihf";
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} else {
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if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabi"))
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return "arm-linux-gnueabi";
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}
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break;
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case llvm::Triple::armeb:
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case llvm::Triple::thumbeb:
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if (TargetEnvironment == llvm::Triple::GNUEABIHF) {
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if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabihf"))
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return "armeb-linux-gnueabihf";
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} else {
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if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabi"))
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return "armeb-linux-gnueabi";
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}
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break;
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case llvm::Triple::x86:
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if (D.getVFS().exists(SysRoot + "/lib/i386-linux-gnu"))
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return "i386-linux-gnu";
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break;
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case llvm::Triple::x86_64:
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// We don't want this for x32, otherwise it will match x86_64 libs
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if (TargetEnvironment != llvm::Triple::GNUX32 &&
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D.getVFS().exists(SysRoot + "/lib/x86_64-linux-gnu"))
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return "x86_64-linux-gnu";
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break;
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case llvm::Triple::aarch64:
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if (D.getVFS().exists(SysRoot + "/lib/aarch64-linux-gnu"))
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return "aarch64-linux-gnu";
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break;
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case llvm::Triple::aarch64_be:
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if (D.getVFS().exists(SysRoot + "/lib/aarch64_be-linux-gnu"))
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return "aarch64_be-linux-gnu";
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break;
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case llvm::Triple::mips:
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if (D.getVFS().exists(SysRoot + "/lib/mips-linux-gnu"))
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return "mips-linux-gnu";
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break;
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case llvm::Triple::mipsel:
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if (D.getVFS().exists(SysRoot + "/lib/mipsel-linux-gnu"))
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return "mipsel-linux-gnu";
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break;
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case llvm::Triple::mips64:
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if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnu"))
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return "mips64-linux-gnu";
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if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnuabi64"))
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return "mips64-linux-gnuabi64";
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break;
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case llvm::Triple::mips64el:
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if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnu"))
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return "mips64el-linux-gnu";
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if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnuabi64"))
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return "mips64el-linux-gnuabi64";
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break;
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case llvm::Triple::ppc:
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if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnuspe"))
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return "powerpc-linux-gnuspe";
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if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnu"))
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return "powerpc-linux-gnu";
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break;
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case llvm::Triple::ppc64:
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if (D.getVFS().exists(SysRoot + "/lib/powerpc64-linux-gnu"))
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return "powerpc64-linux-gnu";
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break;
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case llvm::Triple::ppc64le:
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if (D.getVFS().exists(SysRoot + "/lib/powerpc64le-linux-gnu"))
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return "powerpc64le-linux-gnu";
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break;
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case llvm::Triple::sparc:
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if (D.getVFS().exists(SysRoot + "/lib/sparc-linux-gnu"))
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return "sparc-linux-gnu";
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break;
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case llvm::Triple::sparcv9:
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if (D.getVFS().exists(SysRoot + "/lib/sparc64-linux-gnu"))
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return "sparc64-linux-gnu";
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break;
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case llvm::Triple::systemz:
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if (D.getVFS().exists(SysRoot + "/lib/s390x-linux-gnu"))
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return "s390x-linux-gnu";
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break;
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}
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return TargetTriple.str();
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}
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static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args) {
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if (tools::isMipsArch(Triple.getArch())) {
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if (Triple.isAndroid()) {
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StringRef CPUName;
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StringRef ABIName;
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tools::mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
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if (CPUName == "mips32r6")
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return "libr6";
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if (CPUName == "mips32r2")
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return "libr2";
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}
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// lib32 directory has a special meaning on MIPS targets.
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// It contains N32 ABI binaries. Use this folder if produce
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// code for N32 ABI only.
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if (tools::mips::hasMipsAbiArg(Args, "n32"))
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return "lib32";
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return Triple.isArch32Bit() ? "lib" : "lib64";
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}
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// It happens that only x86 and PPC use the 'lib32' variant of oslibdir, and
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// using that variant while targeting other architectures causes problems
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// because the libraries are laid out in shared system roots that can't cope
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// with a 'lib32' library search path being considered. So we only enable
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// them when we know we may need it.
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//
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// FIXME: This is a bit of a hack. We should really unify this code for
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// reasoning about oslibdir spellings with the lib dir spellings in the
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// GCCInstallationDetector, but that is a more significant refactoring.
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if (Triple.getArch() == llvm::Triple::x86 ||
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Triple.getArch() == llvm::Triple::ppc)
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return "lib32";
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if (Triple.getArch() == llvm::Triple::x86_64 &&
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Triple.getEnvironment() == llvm::Triple::GNUX32)
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return "libx32";
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return Triple.isArch32Bit() ? "lib" : "lib64";
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}
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static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs,
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const Multilib &Multilib,
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StringRef InstallPath,
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ToolChain::path_list &Paths) {
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if (const auto &PathsCallback = Multilibs.filePathsCallback())
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for (const auto &Path : PathsCallback(Multilib))
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addPathIfExists(D, InstallPath + Path, Paths);
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}
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Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
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: Generic_ELF(D, Triple, Args) {
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GCCInstallation.init(Triple, Args);
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Multilibs = GCCInstallation.getMultilibs();
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llvm::Triple::ArchType Arch = Triple.getArch();
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std::string SysRoot = computeSysRoot();
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// Cross-compiling binutils and GCC installations (vanilla and openSUSE at
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// least) put various tools in a triple-prefixed directory off of the parent
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// of the GCC installation. We use the GCC triple here to ensure that we end
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// up with tools that support the same amount of cross compiling as the
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// detected GCC installation. For example, if we find a GCC installation
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// targeting x86_64, but it is a bi-arch GCC installation, it can also be
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// used to target i386.
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// FIXME: This seems unlikely to be Linux-specific.
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ToolChain::path_list &PPaths = getProgramPaths();
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PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
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GCCInstallation.getTriple().str() + "/bin")
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.str());
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Distro Distro(D.getVFS());
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if (Distro.IsOpenSUSE() || Distro.IsUbuntu()) {
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ExtraOpts.push_back("-z");
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ExtraOpts.push_back("relro");
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}
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if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
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ExtraOpts.push_back("-X");
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const bool IsAndroid = Triple.isAndroid();
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const bool IsMips = tools::isMipsArch(Arch);
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const bool IsHexagon = Arch == llvm::Triple::hexagon;
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if (IsMips && !SysRoot.empty())
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ExtraOpts.push_back("--sysroot=" + SysRoot);
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// Do not use 'gnu' hash style for Mips targets because .gnu.hash
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// and the MIPS ABI require .dynsym to be sorted in different ways.
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// .gnu.hash needs symbols to be grouped by hash code whereas the MIPS
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// ABI requires a mapping between the GOT and the symbol table.
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// Android loader does not support .gnu.hash.
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// Hexagon linker/loader does not support .gnu.hash
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if (!IsMips && !IsAndroid && !IsHexagon) {
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if (Distro.IsRedhat() || Distro.IsOpenSUSE() ||
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(Distro.IsUbuntu() && Distro >= Distro::UbuntuMaverick))
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ExtraOpts.push_back("--hash-style=gnu");
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if (Distro.IsDebian() || Distro.IsOpenSUSE() || Distro == Distro::UbuntuLucid ||
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Distro == Distro::UbuntuJaunty || Distro == Distro::UbuntuKarmic)
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ExtraOpts.push_back("--hash-style=both");
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}
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if (Distro.IsRedhat() && Distro != Distro::RHEL5 && Distro != Distro::RHEL6)
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ExtraOpts.push_back("--no-add-needed");
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#ifdef ENABLE_LINKER_BUILD_ID
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ExtraOpts.push_back("--build-id");
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#endif
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if (Distro.IsOpenSUSE())
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ExtraOpts.push_back("--enable-new-dtags");
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// The selection of paths to try here is designed to match the patterns which
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// the GCC driver itself uses, as this is part of the GCC-compatible driver.
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// This was determined by running GCC in a fake filesystem, creating all
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// possible permutations of these directories, and seeing which ones it added
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// to the link paths.
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path_list &Paths = getFilePaths();
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const std::string OSLibDir = getOSLibDir(Triple, Args);
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const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
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// Add the multilib suffixed paths where they are available.
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if (GCCInstallation.isValid()) {
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const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
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const std::string &LibPath = GCCInstallation.getParentLibPath();
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const Multilib &Multilib = GCCInstallation.getMultilib();
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const MultilibSet &Multilibs = GCCInstallation.getMultilibs();
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// Add toolchain / multilib specific file paths.
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addMultilibsFilePaths(D, Multilibs, Multilib,
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GCCInstallation.getInstallPath(), Paths);
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// Sourcery CodeBench MIPS toolchain holds some libraries under
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// a biarch-like suffix of the GCC installation.
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addPathIfExists(D, GCCInstallation.getInstallPath() + Multilib.gccSuffix(),
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Paths);
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// GCC cross compiling toolchains will install target libraries which ship
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// as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
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// any part of the GCC installation in
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// <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
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// debatable, but is the reality today. We need to search this tree even
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// when we have a sysroot somewhere else. It is the responsibility of
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// whomever is doing the cross build targeting a sysroot using a GCC
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// installation that is *not* within the system root to ensure two things:
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//
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// 1) Any DSOs that are linked in from this tree or from the install path
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// above must be present on the system root and found via an
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// appropriate rpath.
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// 2) There must not be libraries installed into
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// <prefix>/<triple>/<libdir> unless they should be preferred over
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// those within the system root.
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//
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// Note that this matches the GCC behavior. See the below comment for where
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// Clang diverges from GCC's behavior.
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addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" +
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OSLibDir + Multilib.osSuffix(),
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Paths);
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// If the GCC installation we found is inside of the sysroot, we want to
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// prefer libraries installed in the parent prefix of the GCC installation.
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// It is important to *not* use these paths when the GCC installation is
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// outside of the system root as that can pick up unintended libraries.
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// This usually happens when there is an external cross compiler on the
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// host system, and a more minimal sysroot available that is the target of
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// the cross. Note that GCC does include some of these directories in some
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// configurations but this seems somewhere between questionable and simply
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// a bug.
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if (StringRef(LibPath).startswith(SysRoot)) {
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addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths);
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addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
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}
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}
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// Similar to the logic for GCC above, if we currently running Clang inside
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// of the requested system root, add its parent library paths to
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// those searched.
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// FIXME: It's not clear whether we should use the driver's installed
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// directory ('Dir' below) or the ResourceDir.
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if (StringRef(D.Dir).startswith(SysRoot)) {
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addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths);
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addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths);
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}
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addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
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addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
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addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths);
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addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths);
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// Try walking via the GCC triple path in case of biarch or multiarch GCC
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// installations with strange symlinks.
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if (GCCInstallation.isValid()) {
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addPathIfExists(D,
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SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() +
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"/../../" + OSLibDir,
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Paths);
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// Add the 'other' biarch variant path
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Multilib BiarchSibling;
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if (GCCInstallation.getBiarchSibling(BiarchSibling)) {
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addPathIfExists(D, GCCInstallation.getInstallPath() +
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BiarchSibling.gccSuffix(),
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Paths);
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}
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// See comments above on the multilib variant for details of why this is
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// included even from outside the sysroot.
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const std::string &LibPath = GCCInstallation.getParentLibPath();
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const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
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const Multilib &Multilib = GCCInstallation.getMultilib();
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addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" +
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Multilib.osSuffix(),
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Paths);
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// See comments above on the multilib variant for details of why this is
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// only included from within the sysroot.
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if (StringRef(LibPath).startswith(SysRoot))
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addPathIfExists(D, LibPath, Paths);
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}
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// Similar to the logic for GCC above, if we are currently running Clang
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// inside of the requested system root, add its parent library path to those
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// searched.
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// FIXME: It's not clear whether we should use the driver's installed
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// directory ('Dir' below) or the ResourceDir.
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if (StringRef(D.Dir).startswith(SysRoot))
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addPathIfExists(D, D.Dir + "/../lib", Paths);
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addPathIfExists(D, SysRoot + "/lib", Paths);
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addPathIfExists(D, SysRoot + "/usr/lib", Paths);
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}
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bool Linux::HasNativeLLVMSupport() const { return true; }
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Tool *Linux::buildLinker() const { return new tools::gnutools::Linker(*this); }
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Tool *Linux::buildAssembler() const {
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return new tools::gnutools::Assembler(*this);
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}
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std::string Linux::computeSysRoot() const {
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if (!getDriver().SysRoot.empty())
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return getDriver().SysRoot;
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if (!GCCInstallation.isValid() || !tools::isMipsArch(getTriple().getArch()))
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return std::string();
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// Standalone MIPS toolchains use different names for sysroot folder
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// and put it into different places. Here we try to check some known
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// variants.
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const StringRef InstallDir = GCCInstallation.getInstallPath();
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const StringRef TripleStr = GCCInstallation.getTriple().str();
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const Multilib &Multilib = GCCInstallation.getMultilib();
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std::string Path =
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(InstallDir + "/../../../../" + TripleStr + "/libc" + Multilib.osSuffix())
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.str();
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if (getVFS().exists(Path))
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return Path;
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Path = (InstallDir + "/../../../../sysroot" + Multilib.osSuffix()).str();
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if (getVFS().exists(Path))
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return Path;
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return std::string();
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}
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std::string Linux::getDynamicLinker(const ArgList &Args) const {
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const llvm::Triple::ArchType Arch = getArch();
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const llvm::Triple &Triple = getTriple();
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const Distro Distro(getDriver().getVFS());
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if (Triple.isAndroid())
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return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker";
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if (Triple.isMusl()) {
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std::string ArchName;
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bool IsArm = false;
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switch (Arch) {
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case llvm::Triple::arm:
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case llvm::Triple::thumb:
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ArchName = "arm";
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IsArm = true;
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break;
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case llvm::Triple::armeb:
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case llvm::Triple::thumbeb:
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ArchName = "armeb";
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IsArm = true;
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break;
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default:
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ArchName = Triple.getArchName().str();
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}
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if (IsArm &&
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(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 ||
|
|
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);
|
|
}
|