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Diffstat (limited to 'contrib/llvm/tools/clang/lib/Driver/ToolChains.cpp')
| -rw-r--r-- | contrib/llvm/tools/clang/lib/Driver/ToolChains.cpp | 2446 |
1 files changed, 2446 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Driver/ToolChains.cpp b/contrib/llvm/tools/clang/lib/Driver/ToolChains.cpp new file mode 100644 index 0000000..bcfe51e --- /dev/null +++ b/contrib/llvm/tools/clang/lib/Driver/ToolChains.cpp @@ -0,0 +1,2446 @@ +//===--- ToolChains.cpp - ToolChain Implementations -----------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "ToolChains.h" +#include "SanitizerArgs.h" +#include "clang/Basic/ObjCRuntime.h" +#include "clang/Basic/Version.h" +#include "clang/Driver/Arg.h" +#include "clang/Driver/ArgList.h" +#include "clang/Driver/Compilation.h" +#include "clang/Driver/Driver.h" +#include "clang/Driver/DriverDiagnostic.h" +#include "clang/Driver/OptTable.h" +#include "clang/Driver/Option.h" +#include "clang/Driver/Options.h" +#include "llvm/ADT/STLExtras.h" +#include "llvm/ADT/SmallString.h" +#include "llvm/ADT/StringExtras.h" +#include "llvm/ADT/StringSwitch.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/FileSystem.h" +#include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/Path.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/Support/system_error.h" + +// FIXME: This needs to be listed last until we fix the broken include guards +// in these files and the LLVM config.h files. +#include "clang/Config/config.h" // for GCC_INSTALL_PREFIX + +#include <cstdlib> // ::getenv + +using namespace clang::driver; +using namespace clang::driver::toolchains; +using namespace clang; + +/// Darwin - Darwin tool chain for i386 and x86_64. + +Darwin::Darwin(const Driver &D, const llvm::Triple& Triple, const ArgList &Args) + : ToolChain(D, Triple, Args), TargetInitialized(false) +{ + // Compute the initial Darwin version from the triple + unsigned Major, Minor, Micro; + if (!Triple.getMacOSXVersion(Major, Minor, Micro)) + getDriver().Diag(diag::err_drv_invalid_darwin_version) << + Triple.getOSName(); + llvm::raw_string_ostream(MacosxVersionMin) + << Major << '.' << Minor << '.' << Micro; + + // FIXME: DarwinVersion is only used to find GCC's libexec directory. + // It should be removed when we stop supporting that. + DarwinVersion[0] = Minor + 4; + DarwinVersion[1] = Micro; + DarwinVersion[2] = 0; + + // Compute the initial iOS version from the triple + Triple.getiOSVersion(Major, Minor, Micro); + llvm::raw_string_ostream(iOSVersionMin) + << Major << '.' << Minor << '.' << Micro; +} + +types::ID Darwin::LookupTypeForExtension(const char *Ext) const { + types::ID Ty = types::lookupTypeForExtension(Ext); + + // Darwin always preprocesses assembly files (unless -x is used explicitly). + if (Ty == types::TY_PP_Asm) + return types::TY_Asm; + + return Ty; +} + +bool Darwin::HasNativeLLVMSupport() const { + return true; +} + +/// Darwin provides an ARC runtime starting in MacOS X 10.7 and iOS 5.0. +ObjCRuntime Darwin::getDefaultObjCRuntime(bool isNonFragile) const { + if (isTargetIPhoneOS()) + return ObjCRuntime(ObjCRuntime::iOS, TargetVersion); + if (isNonFragile) + return ObjCRuntime(ObjCRuntime::MacOSX, TargetVersion); + return ObjCRuntime(ObjCRuntime::FragileMacOSX, TargetVersion); +} + +/// Darwin provides a blocks runtime starting in MacOS X 10.6 and iOS 3.2. +bool Darwin::hasBlocksRuntime() const { + if (isTargetIPhoneOS()) + return !isIPhoneOSVersionLT(3, 2); + else + return !isMacosxVersionLT(10, 6); +} + +static const char *GetArmArchForMArch(StringRef Value) { + return llvm::StringSwitch<const char*>(Value) + .Case("armv6k", "armv6") + .Case("armv6m", "armv6m") + .Case("armv5tej", "armv5") + .Case("xscale", "xscale") + .Case("armv4t", "armv4t") + .Case("armv7", "armv7") + .Cases("armv7a", "armv7-a", "armv7") + .Cases("armv7r", "armv7-r", "armv7") + .Cases("armv7em", "armv7e-m", "armv7em") + .Cases("armv7f", "armv7-f", "armv7f") + .Cases("armv7k", "armv7-k", "armv7k") + .Cases("armv7m", "armv7-m", "armv7m") + .Cases("armv7s", "armv7-s", "armv7s") + .Default(0); +} + +static const char *GetArmArchForMCpu(StringRef Value) { + return llvm::StringSwitch<const char *>(Value) + .Cases("arm9e", "arm946e-s", "arm966e-s", "arm968e-s", "arm926ej-s","armv5") + .Cases("arm10e", "arm10tdmi", "armv5") + .Cases("arm1020t", "arm1020e", "arm1022e", "arm1026ej-s", "armv5") + .Case("xscale", "xscale") + .Cases("arm1136j-s", "arm1136jf-s", "arm1176jz-s", "arm1176jzf-s", "armv6") + .Case("cortex-m0", "armv6m") + .Cases("cortex-a8", "cortex-r4", "cortex-a9", "cortex-a15", "armv7") + .Case("cortex-a9-mp", "armv7f") + .Case("cortex-m3", "armv7m") + .Case("cortex-m4", "armv7em") + .Case("swift", "armv7s") + .Default(0); +} + +StringRef Darwin::getDarwinArchName(const ArgList &Args) const { + switch (getTriple().getArch()) { + default: + return getArchName(); + + case llvm::Triple::thumb: + case llvm::Triple::arm: { + if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) + if (const char *Arch = GetArmArchForMArch(A->getValue())) + return Arch; + + if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) + if (const char *Arch = GetArmArchForMCpu(A->getValue())) + return Arch; + + return "arm"; + } + } +} + +Darwin::~Darwin() { +} + +std::string Darwin::ComputeEffectiveClangTriple(const ArgList &Args, + types::ID InputType) const { + llvm::Triple Triple(ComputeLLVMTriple(Args, InputType)); + + // If the target isn't initialized (e.g., an unknown Darwin platform, return + // the default triple). + if (!isTargetInitialized()) + return Triple.getTriple(); + + SmallString<16> Str; + Str += isTargetIPhoneOS() ? "ios" : "macosx"; + Str += getTargetVersion().getAsString(); + Triple.setOSName(Str); + + return Triple.getTriple(); +} + +void Generic_ELF::anchor() {} + +Tool *Darwin::getTool(Action::ActionClass AC) const { + switch (AC) { + case Action::LipoJobClass: + if (!Lipo) + Lipo.reset(new tools::darwin::Lipo(*this)); + return Lipo.get(); + case Action::DsymutilJobClass: + if (!Dsymutil) + Dsymutil.reset(new tools::darwin::Dsymutil(*this)); + return Dsymutil.get(); + case Action::VerifyJobClass: + if (!VerifyDebug) + VerifyDebug.reset(new tools::darwin::VerifyDebug(*this)); + return VerifyDebug.get(); + default: + return ToolChain::getTool(AC); + } +} + +Tool *Darwin::buildLinker() const { + return new tools::darwin::Link(*this); +} + +Tool *Darwin::buildAssembler() const { + return new tools::darwin::Assemble(*this); +} + +DarwinClang::DarwinClang(const Driver &D, const llvm::Triple& Triple, + const ArgList &Args) + : Darwin(D, Triple, Args) +{ + getProgramPaths().push_back(getDriver().getInstalledDir()); + if (getDriver().getInstalledDir() != getDriver().Dir) + getProgramPaths().push_back(getDriver().Dir); + + // We expect 'as', 'ld', etc. to be adjacent to our install dir. + getProgramPaths().push_back(getDriver().getInstalledDir()); + if (getDriver().getInstalledDir() != getDriver().Dir) + getProgramPaths().push_back(getDriver().Dir); +} + +void DarwinClang::AddLinkARCArgs(const ArgList &Args, + ArgStringList &CmdArgs) const { + + CmdArgs.push_back("-force_load"); + llvm::sys::Path P(getDriver().ClangExecutable); + P.eraseComponent(); // 'clang' + P.eraseComponent(); // 'bin' + P.appendComponent("lib"); + P.appendComponent("arc"); + P.appendComponent("libarclite_"); + std::string s = P.str(); + // Mash in the platform. + if (isTargetIOSSimulator()) + s += "iphonesimulator"; + else if (isTargetIPhoneOS()) + s += "iphoneos"; + else + s += "macosx"; + s += ".a"; + + CmdArgs.push_back(Args.MakeArgString(s)); +} + +void DarwinClang::AddLinkRuntimeLib(const ArgList &Args, + ArgStringList &CmdArgs, + const char *DarwinStaticLib, + bool AlwaysLink) const { + llvm::sys::Path P(getDriver().ResourceDir); + P.appendComponent("lib"); + P.appendComponent("darwin"); + P.appendComponent(DarwinStaticLib); + + // For now, allow missing resource libraries to support developers who may + // not have compiler-rt checked out or integrated into their build (unless + // we explicitly force linking with this library). + bool Exists; + if (AlwaysLink || (!llvm::sys::fs::exists(P.str(), Exists) && Exists)) + CmdArgs.push_back(Args.MakeArgString(P.str())); +} + +void DarwinClang::AddLinkRuntimeLibArgs(const ArgList &Args, + ArgStringList &CmdArgs) const { + // Darwin only supports the compiler-rt based runtime libraries. + switch (GetRuntimeLibType(Args)) { + case ToolChain::RLT_CompilerRT: + break; + default: + getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform) + << Args.getLastArg(options::OPT_rtlib_EQ)->getValue() << "darwin"; + return; + } + + // Darwin doesn't support real static executables, don't link any runtime + // libraries with -static. + if (Args.hasArg(options::OPT_static) || + Args.hasArg(options::OPT_fapple_kext) || + Args.hasArg(options::OPT_mkernel)) + return; + + // Reject -static-libgcc for now, we can deal with this when and if someone + // cares. This is useful in situations where someone wants to statically link + // something like libstdc++, and needs its runtime support routines. + if (const Arg *A = Args.getLastArg(options::OPT_static_libgcc)) { + getDriver().Diag(diag::err_drv_unsupported_opt) + << A->getAsString(Args); + return; + } + + // If we are building profile support, link that library in. + if (Args.hasArg(options::OPT_fprofile_arcs) || + Args.hasArg(options::OPT_fprofile_generate) || + Args.hasArg(options::OPT_fcreate_profile) || + Args.hasArg(options::OPT_coverage)) { + // Select the appropriate runtime library for the target. + if (isTargetIPhoneOS()) { + AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.profile_ios.a"); + } else { + AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.profile_osx.a"); + } + } + + SanitizerArgs Sanitize(getDriver(), Args); + + // Add Ubsan runtime library, if required. + if (Sanitize.needsUbsanRt()) { + if (isTargetIPhoneOS()) { + getDriver().Diag(diag::err_drv_clang_unsupported_per_platform) + << "-fsanitize=undefined"; + } else { + AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.ubsan_osx.a", true); + + // The Ubsan runtime library requires C++. + AddCXXStdlibLibArgs(Args, CmdArgs); + } + } + + // Add ASAN runtime library, if required. Dynamic libraries and bundles + // should not be linked with the runtime library. + if (Sanitize.needsAsanRt()) { + if (isTargetIPhoneOS() && !isTargetIOSSimulator()) { + getDriver().Diag(diag::err_drv_clang_unsupported_per_platform) + << "-fsanitize=address"; + } else { + if (Args.hasArg(options::OPT_dynamiclib) || + Args.hasArg(options::OPT_bundle)) { + // Assume the binary will provide the ASan runtime. + } else { + AddLinkRuntimeLib(Args, CmdArgs, + "libclang_rt.asan_osx_dynamic.dylib", true); + // The ASAN runtime library requires C++. + AddCXXStdlibLibArgs(Args, CmdArgs); + } + } + } + + // Otherwise link libSystem, then the dynamic runtime library, and finally any + // target specific static runtime library. + CmdArgs.push_back("-lSystem"); + + // Select the dynamic runtime library and the target specific static library. + if (isTargetIPhoneOS()) { + // If we are compiling as iOS / simulator, don't attempt to link libgcc_s.1, + // it never went into the SDK. + // Linking against libgcc_s.1 isn't needed for iOS 5.0+ + if (isIPhoneOSVersionLT(5, 0) && !isTargetIOSSimulator()) + CmdArgs.push_back("-lgcc_s.1"); + + // We currently always need a static runtime library for iOS. + AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.ios.a"); + } else { + // The dynamic runtime library was merged with libSystem for 10.6 and + // beyond; only 10.4 and 10.5 need an additional runtime library. + if (isMacosxVersionLT(10, 5)) + CmdArgs.push_back("-lgcc_s.10.4"); + else if (isMacosxVersionLT(10, 6)) + CmdArgs.push_back("-lgcc_s.10.5"); + + // For OS X, we thought we would only need a static runtime library when + // targeting 10.4, to provide versions of the static functions which were + // omitted from 10.4.dylib. + // + // Unfortunately, that turned out to not be true, because Darwin system + // headers can still use eprintf on i386, and it is not exported from + // libSystem. Therefore, we still must provide a runtime library just for + // the tiny tiny handful of projects that *might* use that symbol. + if (isMacosxVersionLT(10, 5)) { + AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.10.4.a"); + } else { + if (getTriple().getArch() == llvm::Triple::x86) + AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.eprintf.a"); + AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.osx.a"); + } + } +} + +void Darwin::AddDeploymentTarget(DerivedArgList &Args) const { + const OptTable &Opts = getDriver().getOpts(); + + // Support allowing the SDKROOT environment variable used by xcrun and other + // Xcode tools to define the default sysroot, by making it the default for + // isysroot. + if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) { + // Warn if the path does not exist. + bool Exists; + if (llvm::sys::fs::exists(A->getValue(), Exists) || !Exists) + getDriver().Diag(clang::diag::warn_missing_sysroot) << A->getValue(); + } else { + if (char *env = ::getenv("SDKROOT")) { + // We only use this value as the default if it is an absolute path, + // exists, and it is not the root path. + if (llvm::sys::path::is_absolute(env) && llvm::sys::fs::exists(env) && + StringRef(env) != "/") { + Args.append(Args.MakeSeparateArg( + 0, Opts.getOption(options::OPT_isysroot), env)); + } + } + } + + Arg *OSXVersion = Args.getLastArg(options::OPT_mmacosx_version_min_EQ); + Arg *iOSVersion = Args.getLastArg(options::OPT_miphoneos_version_min_EQ); + Arg *iOSSimVersion = Args.getLastArg( + options::OPT_mios_simulator_version_min_EQ); + + if (OSXVersion && (iOSVersion || iOSSimVersion)) { + getDriver().Diag(diag::err_drv_argument_not_allowed_with) + << OSXVersion->getAsString(Args) + << (iOSVersion ? iOSVersion : iOSSimVersion)->getAsString(Args); + iOSVersion = iOSSimVersion = 0; + } else if (iOSVersion && iOSSimVersion) { + getDriver().Diag(diag::err_drv_argument_not_allowed_with) + << iOSVersion->getAsString(Args) + << iOSSimVersion->getAsString(Args); + iOSSimVersion = 0; + } else if (!OSXVersion && !iOSVersion && !iOSSimVersion) { + // If no deployment target was specified on the command line, check for + // environment defines. + StringRef OSXTarget; + StringRef iOSTarget; + StringRef iOSSimTarget; + if (char *env = ::getenv("MACOSX_DEPLOYMENT_TARGET")) + OSXTarget = env; + if (char *env = ::getenv("IPHONEOS_DEPLOYMENT_TARGET")) + iOSTarget = env; + if (char *env = ::getenv("IOS_SIMULATOR_DEPLOYMENT_TARGET")) + iOSSimTarget = env; + + // If no '-miphoneos-version-min' specified on the command line and + // IPHONEOS_DEPLOYMENT_TARGET is not defined, see if we can set the default + // based on -isysroot. + if (iOSTarget.empty()) { + if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) { + StringRef first, second; + StringRef isysroot = A->getValue(); + llvm::tie(first, second) = isysroot.split(StringRef("SDKs/iPhoneOS")); + if (second != "") + iOSTarget = second.substr(0,3); + } + } + + // If no OSX or iOS target has been specified and we're compiling for armv7, + // go ahead as assume we're targeting iOS. + if (OSXTarget.empty() && iOSTarget.empty() && + (getDarwinArchName(Args) == "armv7" || + getDarwinArchName(Args) == "armv7s")) + iOSTarget = iOSVersionMin; + + // Handle conflicting deployment targets + // + // FIXME: Don't hardcode default here. + + // Do not allow conflicts with the iOS simulator target. + if (!iOSSimTarget.empty() && (!OSXTarget.empty() || !iOSTarget.empty())) { + getDriver().Diag(diag::err_drv_conflicting_deployment_targets) + << "IOS_SIMULATOR_DEPLOYMENT_TARGET" + << (!OSXTarget.empty() ? "MACOSX_DEPLOYMENT_TARGET" : + "IPHONEOS_DEPLOYMENT_TARGET"); + } + + // Allow conflicts among OSX and iOS for historical reasons, but choose the + // default platform. + if (!OSXTarget.empty() && !iOSTarget.empty()) { + if (getTriple().getArch() == llvm::Triple::arm || + getTriple().getArch() == llvm::Triple::thumb) + OSXTarget = ""; + else + iOSTarget = ""; + } + + if (!OSXTarget.empty()) { + const Option O = Opts.getOption(options::OPT_mmacosx_version_min_EQ); + OSXVersion = Args.MakeJoinedArg(0, O, OSXTarget); + Args.append(OSXVersion); + } else if (!iOSTarget.empty()) { + const Option O = Opts.getOption(options::OPT_miphoneos_version_min_EQ); + iOSVersion = Args.MakeJoinedArg(0, O, iOSTarget); + Args.append(iOSVersion); + } else if (!iOSSimTarget.empty()) { + const Option O = Opts.getOption( + options::OPT_mios_simulator_version_min_EQ); + iOSSimVersion = Args.MakeJoinedArg(0, O, iOSSimTarget); + Args.append(iOSSimVersion); + } else { + // Otherwise, assume we are targeting OS X. + const Option O = Opts.getOption(options::OPT_mmacosx_version_min_EQ); + OSXVersion = Args.MakeJoinedArg(0, O, MacosxVersionMin); + Args.append(OSXVersion); + } + } + + // Reject invalid architecture combinations. + if (iOSSimVersion && (getTriple().getArch() != llvm::Triple::x86 && + getTriple().getArch() != llvm::Triple::x86_64)) { + getDriver().Diag(diag::err_drv_invalid_arch_for_deployment_target) + << getTriple().getArchName() << iOSSimVersion->getAsString(Args); + } + + // Set the tool chain target information. + unsigned Major, Minor, Micro; + bool HadExtra; + if (OSXVersion) { + assert((!iOSVersion && !iOSSimVersion) && "Unknown target platform!"); + if (!Driver::GetReleaseVersion(OSXVersion->getValue(), Major, Minor, + Micro, HadExtra) || HadExtra || + Major != 10 || Minor >= 100 || Micro >= 100) + getDriver().Diag(diag::err_drv_invalid_version_number) + << OSXVersion->getAsString(Args); + } else { + const Arg *Version = iOSVersion ? iOSVersion : iOSSimVersion; + assert(Version && "Unknown target platform!"); + if (!Driver::GetReleaseVersion(Version->getValue(), Major, Minor, + Micro, HadExtra) || HadExtra || + Major >= 10 || Minor >= 100 || Micro >= 100) + getDriver().Diag(diag::err_drv_invalid_version_number) + << Version->getAsString(Args); + } + + bool IsIOSSim = bool(iOSSimVersion); + + // In GCC, the simulator historically was treated as being OS X in some + // contexts, like determining the link logic, despite generally being called + // with an iOS deployment target. For compatibility, we detect the + // simulator as iOS + x86, and treat it differently in a few contexts. + if (iOSVersion && (getTriple().getArch() == llvm::Triple::x86 || + getTriple().getArch() == llvm::Triple::x86_64)) + IsIOSSim = true; + + setTarget(/*IsIPhoneOS=*/ !OSXVersion, Major, Minor, Micro, IsIOSSim); +} + +void DarwinClang::AddCXXStdlibLibArgs(const ArgList &Args, + ArgStringList &CmdArgs) const { + CXXStdlibType Type = GetCXXStdlibType(Args); + + switch (Type) { + case ToolChain::CST_Libcxx: + CmdArgs.push_back("-lc++"); + break; + + case ToolChain::CST_Libstdcxx: { + // Unfortunately, -lstdc++ doesn't always exist in the standard search path; + // it was previously found in the gcc lib dir. However, for all the Darwin + // platforms we care about it was -lstdc++.6, so we search for that + // explicitly if we can't see an obvious -lstdc++ candidate. + + // Check in the sysroot first. + bool Exists; + if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) { + llvm::sys::Path P(A->getValue()); + P.appendComponent("usr"); + P.appendComponent("lib"); + P.appendComponent("libstdc++.dylib"); + + if (llvm::sys::fs::exists(P.str(), Exists) || !Exists) { + P.eraseComponent(); + P.appendComponent("libstdc++.6.dylib"); + if (!llvm::sys::fs::exists(P.str(), Exists) && Exists) { + CmdArgs.push_back(Args.MakeArgString(P.str())); + return; + } + } + } + + // Otherwise, look in the root. + // FIXME: This should be removed someday when we don't have to care about + // 10.6 and earlier, where /usr/lib/libstdc++.dylib does not exist. + if ((llvm::sys::fs::exists("/usr/lib/libstdc++.dylib", Exists) || !Exists)&& + (!llvm::sys::fs::exists("/usr/lib/libstdc++.6.dylib", Exists) && Exists)){ + CmdArgs.push_back("/usr/lib/libstdc++.6.dylib"); + return; + } + + // Otherwise, let the linker search. + CmdArgs.push_back("-lstdc++"); + break; + } + } +} + +void DarwinClang::AddCCKextLibArgs(const ArgList &Args, + ArgStringList &CmdArgs) const { + + // For Darwin platforms, use the compiler-rt-based support library + // instead of the gcc-provided one (which is also incidentally + // only present in the gcc lib dir, which makes it hard to find). + + llvm::sys::Path P(getDriver().ResourceDir); + P.appendComponent("lib"); + P.appendComponent("darwin"); + + // Use the newer cc_kext for iOS ARM after 6.0. + if (!isTargetIPhoneOS() || isTargetIOSSimulator() || + !isIPhoneOSVersionLT(6, 0)) { + P.appendComponent("libclang_rt.cc_kext.a"); + } else { + P.appendComponent("libclang_rt.cc_kext_ios5.a"); + } + + // For now, allow missing resource libraries to support developers who may + // not have compiler-rt checked out or integrated into their build. + bool Exists; + if (!llvm::sys::fs::exists(P.str(), Exists) && Exists) + CmdArgs.push_back(Args.MakeArgString(P.str())); +} + +DerivedArgList *Darwin::TranslateArgs(const DerivedArgList &Args, + const char *BoundArch) const { + DerivedArgList *DAL = new DerivedArgList(Args.getBaseArgs()); + const OptTable &Opts = getDriver().getOpts(); + + // FIXME: We really want to get out of the tool chain level argument + // translation business, as it makes the driver functionality much + // more opaque. For now, we follow gcc closely solely for the + // purpose of easily achieving feature parity & testability. Once we + // have something that works, we should reevaluate each translation + // and try to push it down into tool specific logic. + + for (ArgList::const_iterator it = Args.begin(), + ie = Args.end(); it != ie; ++it) { + Arg *A = *it; + + if (A->getOption().matches(options::OPT_Xarch__)) { + // Skip this argument unless the architecture matches either the toolchain + // triple arch, or the arch being bound. + llvm::Triple::ArchType XarchArch = + tools::darwin::getArchTypeForDarwinArchName(A->getValue(0)); + if (!(XarchArch == getArch() || + (BoundArch && XarchArch == + tools::darwin::getArchTypeForDarwinArchName(BoundArch)))) + continue; + + Arg *OriginalArg = A; + unsigned Index = Args.getBaseArgs().MakeIndex(A->getValue(1)); + unsigned Prev = Index; + Arg *XarchArg = Opts.ParseOneArg(Args, Index); + + // If the argument parsing failed or more than one argument was + // consumed, the -Xarch_ argument's parameter tried to consume + // extra arguments. Emit an error and ignore. + // + // We also want to disallow any options which would alter the + // driver behavior; that isn't going to work in our model. We + // use isDriverOption() as an approximation, although things + // like -O4 are going to slip through. + if (!XarchArg || Index > Prev + 1) { + getDriver().Diag(diag::err_drv_invalid_Xarch_argument_with_args) + << A->getAsString(Args); + continue; + } else if (XarchArg->getOption().hasFlag(options::DriverOption)) { + getDriver().Diag(diag::err_drv_invalid_Xarch_argument_isdriver) + << A->getAsString(Args); + continue; + } + + XarchArg->setBaseArg(A); + A = XarchArg; + + DAL->AddSynthesizedArg(A); + + // Linker input arguments require custom handling. The problem is that we + // have already constructed the phase actions, so we can not treat them as + // "input arguments". + if (A->getOption().hasFlag(options::LinkerInput)) { + // Convert the argument into individual Zlinker_input_args. + for (unsigned i = 0, e = A->getNumValues(); i != e; ++i) { + DAL->AddSeparateArg(OriginalArg, + Opts.getOption(options::OPT_Zlinker_input), + A->getValue(i)); + + } + continue; + } + } + + // Sob. These is strictly gcc compatible for the time being. Apple + // gcc translates options twice, which means that self-expanding + // options add duplicates. + switch ((options::ID) A->getOption().getID()) { + default: + DAL->append(A); + break; + + case options::OPT_mkernel: + case options::OPT_fapple_kext: + DAL->append(A); + DAL->AddFlagArg(A, Opts.getOption(options::OPT_static)); + break; + + case options::OPT_dependency_file: + DAL->AddSeparateArg(A, Opts.getOption(options::OPT_MF), + A->getValue()); + break; + + case options::OPT_gfull: + DAL->AddFlagArg(A, Opts.getOption(options::OPT_g_Flag)); + DAL->AddFlagArg(A, + Opts.getOption(options::OPT_fno_eliminate_unused_debug_symbols)); + break; + + case options::OPT_gused: + DAL->AddFlagArg(A, Opts.getOption(options::OPT_g_Flag)); + DAL->AddFlagArg(A, + Opts.getOption(options::OPT_feliminate_unused_debug_symbols)); + break; + + case options::OPT_shared: + DAL->AddFlagArg(A, Opts.getOption(options::OPT_dynamiclib)); + break; + + case options::OPT_fconstant_cfstrings: + DAL->AddFlagArg(A, Opts.getOption(options::OPT_mconstant_cfstrings)); + break; + + case options::OPT_fno_constant_cfstrings: + DAL->AddFlagArg(A, Opts.getOption(options::OPT_mno_constant_cfstrings)); + break; + + case options::OPT_Wnonportable_cfstrings: + DAL->AddFlagArg(A, + Opts.getOption(options::OPT_mwarn_nonportable_cfstrings)); + break; + + case options::OPT_Wno_nonportable_cfstrings: + DAL->AddFlagArg(A, + Opts.getOption(options::OPT_mno_warn_nonportable_cfstrings)); + break; + + case options::OPT_fpascal_strings: + DAL->AddFlagArg(A, Opts.getOption(options::OPT_mpascal_strings)); + break; + + case options::OPT_fno_pascal_strings: + DAL->AddFlagArg(A, Opts.getOption(options::OPT_mno_pascal_strings)); + break; + } + } + + if (getTriple().getArch() == llvm::Triple::x86 || + getTriple().getArch() == llvm::Triple::x86_64) + if (!Args.hasArgNoClaim(options::OPT_mtune_EQ)) + DAL->AddJoinedArg(0, Opts.getOption(options::OPT_mtune_EQ), "core2"); + + // Add the arch options based on the particular spelling of -arch, to match + // how the driver driver works. + if (BoundArch) { + StringRef Name = BoundArch; + const Option MCpu = Opts.getOption(options::OPT_mcpu_EQ); + const Option MArch = Opts.getOption(options::OPT_march_EQ); + + // This code must be kept in sync with LLVM's getArchTypeForDarwinArch, + // which defines the list of which architectures we accept. + if (Name == "ppc") + ; + else if (Name == "ppc601") + DAL->AddJoinedArg(0, MCpu, "601"); + else if (Name == "ppc603") + DAL->AddJoinedArg(0, MCpu, "603"); + else if (Name == "ppc604") + DAL->AddJoinedArg(0, MCpu, "604"); + else if (Name == "ppc604e") + DAL->AddJoinedArg(0, MCpu, "604e"); + else if (Name == "ppc750") + DAL->AddJoinedArg(0, MCpu, "750"); + else if (Name == "ppc7400") + DAL->AddJoinedArg(0, MCpu, "7400"); + else if (Name == "ppc7450") + DAL->AddJoinedArg(0, MCpu, "7450"); + else if (Name == "ppc970") + DAL->AddJoinedArg(0, MCpu, "970"); + + else if (Name == "ppc64") + DAL->AddFlagArg(0, Opts.getOption(options::OPT_m64)); + + else if (Name == "i386") + ; + else if (Name == "i486") + DAL->AddJoinedArg(0, MArch, "i486"); + else if (Name == "i586") + DAL->AddJoinedArg(0, MArch, "i586"); + else if (Name == "i686") + DAL->AddJoinedArg(0, MArch, "i686"); + else if (Name == "pentium") + DAL->AddJoinedArg(0, MArch, "pentium"); + else if (Name == "pentium2") + DAL->AddJoinedArg(0, MArch, "pentium2"); + else if (Name == "pentpro") + DAL->AddJoinedArg(0, MArch, "pentiumpro"); + else if (Name == "pentIIm3") + DAL->AddJoinedArg(0, MArch, "pentium2"); + + else if (Name == "x86_64") + DAL->AddFlagArg(0, Opts.getOption(options::OPT_m64)); + + else if (Name == "arm") + DAL->AddJoinedArg(0, MArch, "armv4t"); + else if (Name == "armv4t") + DAL->AddJoinedArg(0, MArch, "armv4t"); + else if (Name == "armv5") + DAL->AddJoinedArg(0, MArch, "armv5tej"); + else if (Name == "xscale") + DAL->AddJoinedArg(0, MArch, "xscale"); + else if (Name == "armv6") + DAL->AddJoinedArg(0, MArch, "armv6k"); + else if (Name == "armv6m") + DAL->AddJoinedArg(0, MArch, "armv6m"); + else if (Name == "armv7") + DAL->AddJoinedArg(0, MArch, "armv7a"); + else if (Name == "armv7em") + DAL->AddJoinedArg(0, MArch, "armv7em"); + else if (Name == "armv7f") + DAL->AddJoinedArg(0, MArch, "armv7f"); + else if (Name == "armv7k") + DAL->AddJoinedArg(0, MArch, "armv7k"); + else if (Name == "armv7m") + DAL->AddJoinedArg(0, MArch, "armv7m"); + else if (Name == "armv7s") + DAL->AddJoinedArg(0, MArch, "armv7s"); + + else + llvm_unreachable("invalid Darwin arch"); + } + + // Add an explicit version min argument for the deployment target. We do this + // after argument translation because -Xarch_ arguments may add a version min + // argument. + if (BoundArch) + AddDeploymentTarget(*DAL); + + // For iOS 6, undo the translation to add -static for -mkernel/-fapple-kext. + // FIXME: It would be far better to avoid inserting those -static arguments, + // but we can't check the deployment target in the translation code until + // it is set here. + if (isTargetIPhoneOS() && !isIPhoneOSVersionLT(6, 0)) { + for (ArgList::iterator it = DAL->begin(), ie = DAL->end(); it != ie; ) { + Arg *A = *it; + ++it; + if (A->getOption().getID() != options::OPT_mkernel && + A->getOption().getID() != options::OPT_fapple_kext) + continue; + assert(it != ie && "unexpected argument translation"); + A = *it; + assert(A->getOption().getID() == options::OPT_static && + "missing expected -static argument"); + it = DAL->getArgs().erase(it); + } + } + + // Validate the C++ standard library choice. + CXXStdlibType Type = GetCXXStdlibType(*DAL); + if (Type == ToolChain::CST_Libcxx) { + // Check whether the target provides libc++. + StringRef where; + + // Complain about targetting iOS < 5.0 in any way. + if (isTargetIPhoneOS() && isIPhoneOSVersionLT(5, 0)) + where = "iOS 5.0"; + + if (where != StringRef()) { + getDriver().Diag(clang::diag::err_drv_invalid_libcxx_deployment) + << where; + } + } + + return DAL; +} + +bool Darwin::IsUnwindTablesDefault() const { + return getArch() == llvm::Triple::x86_64; +} + +bool Darwin::UseDwarfDebugFlags() const { + if (const char *S = ::getenv("RC_DEBUG_OPTIONS")) + return S[0] != '\0'; + return false; +} + +bool Darwin::UseSjLjExceptions() const { + // Darwin uses SjLj exceptions on ARM. + return (getTriple().getArch() == llvm::Triple::arm || + getTriple().getArch() == llvm::Triple::thumb); +} + +bool Darwin::isPICDefault() const { + return true; +} + +bool Darwin::isPICDefaultForced() const { + return getArch() == llvm::Triple::x86_64; +} + +bool Darwin::SupportsProfiling() const { + // Profiling instrumentation is only supported on x86. + return getArch() == llvm::Triple::x86 || getArch() == llvm::Triple::x86_64; +} + +bool Darwin::SupportsObjCGC() const { + // Garbage collection is supported everywhere except on iPhone OS. + return !isTargetIPhoneOS(); +} + +void Darwin::CheckObjCARC() const { + if (isTargetIPhoneOS() || !isMacosxVersionLT(10, 6)) + return; + getDriver().Diag(diag::err_arc_unsupported_on_toolchain); +} + +std::string +Darwin_Generic_GCC::ComputeEffectiveClangTriple(const ArgList &Args, + types::ID InputType) const { + return ComputeLLVMTriple(Args, InputType); +} + +/// Generic_GCC - A tool chain using the 'gcc' command to perform +/// all subcommands; this relies on gcc translating the majority of +/// command line options. + +/// \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; + if (Second.first.getAsInteger(10, GoodVersion.Minor) || + GoodVersion.Minor < 0) + return BadVersion; + + // 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: + // 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).str(); + } + } + + return GoodVersion; +} + +/// \brief Less-than for GCCVersion, implementing a Strict Weak Ordering. +bool Generic_GCC::GCCVersion::operator<(const GCCVersion &RHS) const { + if (Major != RHS.Major) + return Major < RHS.Major; + if (Minor != RHS.Minor) + return Minor < RHS.Minor; + if (Patch != RHS.Patch) { + // Note that versions without a specified patch sort higher than those with + // a patch. + if (RHS.Patch == -1) + return true; + if (Patch == -1) + return false; + + // Otherwise just sort on the patch itself. + return Patch < RHS.Patch; + } + if (PatchSuffix != RHS.PatchSuffix) { + // Sort empty suffixes higher. + if (RHS.PatchSuffix.empty()) + return true; + if (PatchSuffix.empty()) + return false; + + // Provide a lexicographic sort to make this a total ordering. + return PatchSuffix < RHS.PatchSuffix; + } + + // The versions are equal. + return false; +} + +static StringRef getGCCToolchainDir(const ArgList &Args) { + const Arg *A = Args.getLastArg(options::OPT_gcc_toolchain); + if (A) + return A->getValue(); + return GCC_INSTALL_PREFIX; +} + +/// \brief Construct a GCCInstallationDetector from the driver. +/// +/// This performs all of the autodetection and sets up the various paths. +/// Once constructed, a GCCInstallationDetector is essentially immutable. +/// +/// FIXME: We shouldn't need an explicit TargetTriple parameter here, and +/// should instead pull the target out of the driver. This is currently +/// necessary because the driver doesn't store the final version of the target +/// triple. +Generic_GCC::GCCInstallationDetector::GCCInstallationDetector( + const Driver &D, + const llvm::Triple &TargetTriple, + const ArgList &Args) + : IsValid(false) { + llvm::Triple MultiarchTriple + = TargetTriple.isArch32Bit() ? TargetTriple.get64BitArchVariant() + : TargetTriple.get32BitArchVariant(); + llvm::Triple::ArchType TargetArch = TargetTriple.getArch(); + // The library directories which may contain GCC installations. + SmallVector<StringRef, 4> CandidateLibDirs, CandidateMultiarchLibDirs; + // The compatible GCC triples for this particular architecture. + SmallVector<StringRef, 10> CandidateTripleAliases; + SmallVector<StringRef, 10> CandidateMultiarchTripleAliases; + CollectLibDirsAndTriples(TargetTriple, MultiarchTriple, CandidateLibDirs, + CandidateTripleAliases, + CandidateMultiarchLibDirs, + CandidateMultiarchTripleAliases); + + // Compute the set of prefixes for our search. + SmallVector<std::string, 8> Prefixes(D.PrefixDirs.begin(), + D.PrefixDirs.end()); + + StringRef GCCToolchainDir = getGCCToolchainDir(Args); + if (GCCToolchainDir != "") { + if (GCCToolchainDir.back() == '/') + GCCToolchainDir = GCCToolchainDir.drop_back(); // remove the / + + Prefixes.push_back(GCCToolchainDir); + } else { + Prefixes.push_back(D.SysRoot); + Prefixes.push_back(D.SysRoot + "/usr"); + Prefixes.push_back(D.InstalledDir + "/.."); + } + + // Loop over the various components which exist and select the best GCC + // installation available. GCC installs are ranked by version number. + Version = GCCVersion::Parse("0.0.0"); + for (unsigned i = 0, ie = Prefixes.size(); i < ie; ++i) { + if (!llvm::sys::fs::exists(Prefixes[i])) + continue; + for (unsigned j = 0, je = CandidateLibDirs.size(); j < je; ++j) { + const std::string LibDir = Prefixes[i] + CandidateLibDirs[j].str(); + if (!llvm::sys::fs::exists(LibDir)) + continue; + for (unsigned k = 0, ke = CandidateTripleAliases.size(); k < ke; ++k) + ScanLibDirForGCCTriple(TargetArch, Args, LibDir, + CandidateTripleAliases[k]); + } + for (unsigned j = 0, je = CandidateMultiarchLibDirs.size(); j < je; ++j) { + const std::string LibDir + = Prefixes[i] + CandidateMultiarchLibDirs[j].str(); + if (!llvm::sys::fs::exists(LibDir)) + continue; + for (unsigned k = 0, ke = CandidateMultiarchTripleAliases.size(); k < ke; + ++k) + ScanLibDirForGCCTriple(TargetArch, Args, LibDir, + CandidateMultiarchTripleAliases[k], + /*NeedsMultiarchSuffix=*/true); + } + } +} + +/*static*/ void Generic_GCC::GCCInstallationDetector::CollectLibDirsAndTriples( + const llvm::Triple &TargetTriple, + const llvm::Triple &MultiarchTriple, + SmallVectorImpl<StringRef> &LibDirs, + SmallVectorImpl<StringRef> &TripleAliases, + SmallVectorImpl<StringRef> &MultiarchLibDirs, + SmallVectorImpl<StringRef> &MultiarchTripleAliases) { + // Declare a bunch of static data sets that we'll select between below. These + // are specifically designed to always refer to string literals to avoid any + // lifetime or initialization issues. + static const char *const AArch64LibDirs[] = { "/lib" }; + static const char *const AArch64Triples[] = { + "aarch64-none-linux-gnu", + "aarch64-linux-gnu" + }; + + static const char *const ARMLibDirs[] = { "/lib" }; + static const char *const ARMTriples[] = { + "arm-linux-gnueabi", + "arm-linux-androideabi" + }; + static const char *const ARMHFTriples[] = { + "arm-linux-gnueabihf", + }; + + static const char *const X86_64LibDirs[] = { "/lib64", "/lib" }; + static const char *const X86_64Triples[] = { + "x86_64-linux-gnu", + "x86_64-unknown-linux-gnu", + "x86_64-pc-linux-gnu", + "x86_64-redhat-linux6E", + "x86_64-redhat-linux", + "x86_64-suse-linux", + "x86_64-manbo-linux-gnu", + "x86_64-linux-gnu", + "x86_64-slackware-linux" + }; + static const char *const X86LibDirs[] = { "/lib32", "/lib" }; + static const char *const X86Triples[] = { + "i686-linux-gnu", + "i686-pc-linux-gnu", + "i486-linux-gnu", + "i386-linux-gnu", + "i386-redhat-linux6E", + "i686-redhat-linux", + "i586-redhat-linux", + "i386-redhat-linux", + "i586-suse-linux", + "i486-slackware-linux", + "i686-montavista-linux" + }; + + static const char *const MIPSLibDirs[] = { "/lib" }; + static const char *const MIPSTriples[] = { "mips-linux-gnu" }; + static const char *const MIPSELLibDirs[] = { "/lib" }; + static const char *const MIPSELTriples[] = { + "mipsel-linux-gnu", + "mipsel-linux-android" + }; + + static const char *const MIPS64LibDirs[] = { "/lib64", "/lib" }; + static const char *const MIPS64Triples[] = { "mips64-linux-gnu" }; + static const char *const MIPS64ELLibDirs[] = { "/lib64", "/lib" }; + static const char *const MIPS64ELTriples[] = { "mips64el-linux-gnu" }; + + static const char *const PPCLibDirs[] = { "/lib32", "/lib" }; + static const char *const PPCTriples[] = { + "powerpc-linux-gnu", + "powerpc-unknown-linux-gnu", + "powerpc-linux-gnuspe", + "powerpc-suse-linux", + "powerpc-montavista-linuxspe" + }; + static const char *const PPC64LibDirs[] = { "/lib64", "/lib" }; + static const char *const PPC64Triples[] = { + "powerpc64-linux-gnu", + "powerpc64-unknown-linux-gnu", + "powerpc64-suse-linux", + "ppc64-redhat-linux" + }; + + switch (TargetTriple.getArch()) { + case llvm::Triple::aarch64: + LibDirs.append(AArch64LibDirs, AArch64LibDirs + + llvm::array_lengthof(AArch64LibDirs)); + TripleAliases.append( + AArch64Triples, AArch64Triples + llvm::array_lengthof(AArch64Triples)); + MultiarchLibDirs.append( + AArch64LibDirs, AArch64LibDirs + llvm::array_lengthof(AArch64LibDirs)); + MultiarchTripleAliases.append( + AArch64Triples, AArch64Triples + llvm::array_lengthof(AArch64Triples)); + break; + case llvm::Triple::arm: + case llvm::Triple::thumb: + LibDirs.append(ARMLibDirs, ARMLibDirs + llvm::array_lengthof(ARMLibDirs)); + if (TargetTriple.getEnvironment() == llvm::Triple::GNUEABIHF) { + TripleAliases.append( + ARMHFTriples, ARMHFTriples + llvm::array_lengthof(ARMHFTriples)); + } else { + TripleAliases.append( + ARMTriples, ARMTriples + llvm::array_lengthof(ARMTriples)); + } + break; + case llvm::Triple::x86_64: + LibDirs.append( + X86_64LibDirs, X86_64LibDirs + llvm::array_lengthof(X86_64LibDirs)); + TripleAliases.append( + X86_64Triples, X86_64Triples + llvm::array_lengthof(X86_64Triples)); + MultiarchLibDirs.append( + X86LibDirs, X86LibDirs + llvm::array_lengthof(X86LibDirs)); + MultiarchTripleAliases.append( + X86Triples, X86Triples + llvm::array_lengthof(X86Triples)); + break; + case llvm::Triple::x86: + LibDirs.append(X86LibDirs, X86LibDirs + llvm::array_lengthof(X86LibDirs)); + TripleAliases.append( + X86Triples, X86Triples + llvm::array_lengthof(X86Triples)); + MultiarchLibDirs.append( + X86_64LibDirs, X86_64LibDirs + llvm::array_lengthof(X86_64LibDirs)); + MultiarchTripleAliases.append( + X86_64Triples, X86_64Triples + llvm::array_lengthof(X86_64Triples)); + break; + case llvm::Triple::mips: + LibDirs.append( + MIPSLibDirs, MIPSLibDirs + llvm::array_lengthof(MIPSLibDirs)); + TripleAliases.append( + MIPSTriples, MIPSTriples + llvm::array_lengthof(MIPSTriples)); + MultiarchLibDirs.append( + MIPS64LibDirs, MIPS64LibDirs + llvm::array_lengthof(MIPS64LibDirs)); + MultiarchTripleAliases.append( + MIPS64Triples, MIPS64Triples + llvm::array_lengthof(MIPS64Triples)); + break; + case llvm::Triple::mipsel: + LibDirs.append( + MIPSELLibDirs, MIPSELLibDirs + llvm::array_lengthof(MIPSELLibDirs)); + TripleAliases.append( + MIPSELTriples, MIPSELTriples + llvm::array_lengthof(MIPSELTriples)); + MultiarchLibDirs.append( + MIPS64ELLibDirs, MIPS64ELLibDirs + llvm::array_lengthof(MIPS64ELLibDirs)); + MultiarchTripleAliases.append( + MIPS64ELTriples, MIPS64ELTriples + llvm::array_lengthof(MIPS64ELTriples)); + break; + case llvm::Triple::mips64: + LibDirs.append( + MIPS64LibDirs, MIPS64LibDirs + llvm::array_lengthof(MIPS64LibDirs)); + TripleAliases.append( + MIPS64Triples, MIPS64Triples + llvm::array_lengthof(MIPS64Triples)); + MultiarchLibDirs.append( + MIPSLibDirs, MIPSLibDirs + llvm::array_lengthof(MIPSLibDirs)); + MultiarchTripleAliases.append( + MIPSTriples, MIPSTriples + llvm::array_lengthof(MIPSTriples)); + break; + case llvm::Triple::mips64el: + LibDirs.append( + MIPS64ELLibDirs, MIPS64ELLibDirs + llvm::array_lengthof(MIPS64ELLibDirs)); + TripleAliases.append( + MIPS64ELTriples, MIPS64ELTriples + llvm::array_lengthof(MIPS64ELTriples)); + MultiarchLibDirs.append( + MIPSELLibDirs, MIPSELLibDirs + llvm::array_lengthof(MIPSELLibDirs)); + MultiarchTripleAliases.append( + MIPSELTriples, MIPSELTriples + llvm::array_lengthof(MIPSELTriples)); + break; + case llvm::Triple::ppc: + LibDirs.append(PPCLibDirs, PPCLibDirs + llvm::array_lengthof(PPCLibDirs)); + TripleAliases.append( + PPCTriples, PPCTriples + llvm::array_lengthof(PPCTriples)); + MultiarchLibDirs.append( + PPC64LibDirs, PPC64LibDirs + llvm::array_lengthof(PPC64LibDirs)); + MultiarchTripleAliases.append( + PPC64Triples, PPC64Triples + llvm::array_lengthof(PPC64Triples)); + break; + case llvm::Triple::ppc64: + LibDirs.append( + PPC64LibDirs, PPC64LibDirs + llvm::array_lengthof(PPC64LibDirs)); + TripleAliases.append( + PPC64Triples, PPC64Triples + llvm::array_lengthof(PPC64Triples)); + MultiarchLibDirs.append( + PPCLibDirs, PPCLibDirs + llvm::array_lengthof(PPCLibDirs)); + MultiarchTripleAliases.append( + PPCTriples, PPCTriples + llvm::array_lengthof(PPCTriples)); + break; + + default: + // By default, just rely on the standard lib directories and the original + // triple. + break; + } + + // Always append the drivers target triple to the end, in case it doesn't + // match any of our aliases. + TripleAliases.push_back(TargetTriple.str()); + + // Also include the multiarch variant if it's different. + if (TargetTriple.str() != MultiarchTriple.str()) + MultiarchTripleAliases.push_back(MultiarchTriple.str()); +} + +// FIXME: There is the same routine in the Tools.cpp. +static bool hasMipsN32ABIArg(const ArgList &Args) { + Arg *A = Args.getLastArg(options::OPT_mabi_EQ); + return A && (A->getValue() == StringRef("n32")); +} + +static StringRef getTargetMultiarchSuffix(llvm::Triple::ArchType TargetArch, + const ArgList &Args) { + if (TargetArch == llvm::Triple::x86_64 || + TargetArch == llvm::Triple::ppc64) + return "/64"; + + if (TargetArch == llvm::Triple::mips64 || + TargetArch == llvm::Triple::mips64el) { + if (hasMipsN32ABIArg(Args)) + return "/n32"; + else + return "/64"; + } + + return "/32"; +} + +void Generic_GCC::GCCInstallationDetector::ScanLibDirForGCCTriple( + llvm::Triple::ArchType TargetArch, const ArgList &Args, + const std::string &LibDir, + StringRef CandidateTriple, bool NeedsMultiarchSuffix) { + // There are various different suffixes involving the triple we + // check for. We also record what is necessary to walk from each back + // up to the lib directory. + const std::string LibSuffixes[] = { + "/gcc/" + CandidateTriple.str(), + "/" + CandidateTriple.str() + "/gcc/" + CandidateTriple.str(), + + // The Freescale PPC SDK has the gcc libraries in + // <sysroot>/usr/lib/<triple>/x.y.z so have a look there as well. + "/" + CandidateTriple.str(), + + // Ubuntu has a strange mis-matched pair of triples that this happens to + // match. + // FIXME: It may be worthwhile to generalize this and look for a second + // triple. + "/i386-linux-gnu/gcc/" + CandidateTriple.str() + }; + const std::string InstallSuffixes[] = { + "/../../..", + "/../../../..", + "/../..", + "/../../../.." + }; + // Only look at the final, weird Ubuntu suffix for i386-linux-gnu. + const unsigned NumLibSuffixes = (llvm::array_lengthof(LibSuffixes) - + (TargetArch != llvm::Triple::x86)); + for (unsigned i = 0; i < NumLibSuffixes; ++i) { + StringRef LibSuffix = LibSuffixes[i]; + llvm::error_code EC; + for (llvm::sys::fs::directory_iterator LI(LibDir + LibSuffix, EC), LE; + !EC && LI != LE; LI = LI.increment(EC)) { + StringRef VersionText = llvm::sys::path::filename(LI->path()); + GCCVersion CandidateVersion = GCCVersion::Parse(VersionText); + static const GCCVersion MinVersion = { "4.1.1", 4, 1, 1, "" }; + if (CandidateVersion < MinVersion) + continue; + if (CandidateVersion <= Version) + continue; + + // Some versions of SUSE and Fedora on ppc64 put 32-bit libs + // in what would normally be GCCInstallPath and put the 64-bit + // libs in a subdirectory named 64. The simple logic we follow is that + // *if* there is a subdirectory of the right name with crtbegin.o in it, + // we use that. If not, and if not a multiarch triple, we look for + // crtbegin.o without the subdirectory. + StringRef MultiarchSuffix = getTargetMultiarchSuffix(TargetArch, Args); + if (llvm::sys::fs::exists(LI->path() + MultiarchSuffix + "/crtbegin.o")) { + GCCMultiarchSuffix = MultiarchSuffix.str(); + } else { + if (NeedsMultiarchSuffix || + !llvm::sys::fs::exists(LI->path() + "/crtbegin.o")) + continue; + GCCMultiarchSuffix.clear(); + } + + Version = CandidateVersion; + GCCTriple.setTriple(CandidateTriple); + // FIXME: We hack together the directory name here instead of + // using LI to ensure stable path separators across Windows and + // Linux. + GCCInstallPath = LibDir + LibSuffixes[i] + "/" + VersionText.str(); + GCCParentLibPath = GCCInstallPath + InstallSuffixes[i]; + IsValid = true; + } + } +} + +Generic_GCC::Generic_GCC(const Driver &D, const llvm::Triple& Triple, + const ArgList &Args) + : ToolChain(D, Triple, Args), GCCInstallation(getDriver(), Triple, Args) { + getProgramPaths().push_back(getDriver().getInstalledDir()); + if (getDriver().getInstalledDir() != getDriver().Dir) + getProgramPaths().push_back(getDriver().Dir); +} + +Generic_GCC::~Generic_GCC() { +} + +Tool *Generic_GCC::getTool(Action::ActionClass AC) const { + switch (AC) { + case Action::PreprocessJobClass: + if (!Preprocess) + Preprocess.reset(new tools::gcc::Preprocess(*this)); + return Preprocess.get(); + case Action::PrecompileJobClass: + if (!Precompile) + Precompile.reset(new tools::gcc::Precompile(*this)); + return Precompile.get(); + case Action::CompileJobClass: + if (!Compile) + Compile.reset(new tools::gcc::Compile(*this)); + return Compile.get(); + default: + return ToolChain::getTool(AC); + } +} + +Tool *Generic_GCC::buildAssembler() const { + return new tools::gcc::Assemble(*this); +} + +Tool *Generic_GCC::buildLinker() const { + return new tools::gcc::Link(*this); +} + +bool Generic_GCC::IsUnwindTablesDefault() const { + return getArch() == llvm::Triple::x86_64; +} + +bool Generic_GCC::isPICDefault() const { + return false; +} + +bool Generic_GCC::isPICDefaultForced() const { + return false; +} + +/// Hexagon Toolchain + +std::string Hexagon_TC::GetGnuDir(const std::string &InstalledDir) { + + // Locate the rest of the toolchain ... + if (strlen(GCC_INSTALL_PREFIX)) + return std::string(GCC_INSTALL_PREFIX); + + std::string InstallRelDir = InstalledDir + "/../../gnu"; + if (llvm::sys::fs::exists(InstallRelDir)) + return InstallRelDir; + + std::string PrefixRelDir = std::string(LLVM_PREFIX) + "/../gnu"; + if (llvm::sys::fs::exists(PrefixRelDir)) + return PrefixRelDir; + + return InstallRelDir; +} + +static void GetHexagonLibraryPaths( + const ArgList &Args, + const std::string Ver, + const std::string MarchString, + const std::string &InstalledDir, + ToolChain::path_list *LibPaths) +{ + bool buildingLib = Args.hasArg(options::OPT_shared); + + //---------------------------------------------------------------------------- + // -L Args + //---------------------------------------------------------------------------- + for (arg_iterator + it = Args.filtered_begin(options::OPT_L), + ie = Args.filtered_end(); + it != ie; + ++it) { + for (unsigned i = 0, e = (*it)->getNumValues(); i != e; ++i) + LibPaths->push_back((*it)->getValue(i)); + } + + //---------------------------------------------------------------------------- + // Other standard paths + //---------------------------------------------------------------------------- + const std::string MarchSuffix = "/" + MarchString; + const std::string G0Suffix = "/G0"; + const std::string MarchG0Suffix = MarchSuffix + G0Suffix; + const std::string RootDir = Hexagon_TC::GetGnuDir(InstalledDir) + "/"; + + // lib/gcc/hexagon/... + std::string LibGCCHexagonDir = RootDir + "lib/gcc/hexagon/"; + if (buildingLib) { + LibPaths->push_back(LibGCCHexagonDir + Ver + MarchG0Suffix); + LibPaths->push_back(LibGCCHexagonDir + Ver + G0Suffix); + } + LibPaths->push_back(LibGCCHexagonDir + Ver + MarchSuffix); + LibPaths->push_back(LibGCCHexagonDir + Ver); + + // lib/gcc/... + LibPaths->push_back(RootDir + "lib/gcc"); + + // hexagon/lib/... + std::string HexagonLibDir = RootDir + "hexagon/lib"; + if (buildingLib) { + LibPaths->push_back(HexagonLibDir + MarchG0Suffix); + LibPaths->push_back(HexagonLibDir + G0Suffix); + } + LibPaths->push_back(HexagonLibDir + MarchSuffix); + LibPaths->push_back(HexagonLibDir); +} + +Hexagon_TC::Hexagon_TC(const Driver &D, const llvm::Triple &Triple, + const ArgList &Args) + : Linux(D, Triple, Args) { + const std::string InstalledDir(getDriver().getInstalledDir()); + const std::string GnuDir = Hexagon_TC::GetGnuDir(InstalledDir); + + // Note: Generic_GCC::Generic_GCC adds InstalledDir and getDriver().Dir to + // program paths + const std::string BinDir(GnuDir + "/bin"); + if (llvm::sys::fs::exists(BinDir)) + getProgramPaths().push_back(BinDir); + + // Determine version of GCC libraries and headers to use. + const std::string HexagonDir(GnuDir + "/lib/gcc/hexagon"); + llvm::error_code ec; + GCCVersion MaxVersion= GCCVersion::Parse("0.0.0"); + for (llvm::sys::fs::directory_iterator di(HexagonDir, ec), de; + !ec && di != de; di = di.increment(ec)) { + GCCVersion cv = GCCVersion::Parse(llvm::sys::path::filename(di->path())); + if (MaxVersion < cv) + MaxVersion = cv; + } + GCCLibAndIncVersion = MaxVersion; + + ToolChain::path_list *LibPaths= &getFilePaths(); + + // Remove paths added by Linux toolchain. Currently Hexagon_TC really targets + // 'elf' OS type, so the Linux paths are not appropriate. When we actually + // support 'linux' we'll need to fix this up + LibPaths->clear(); + + GetHexagonLibraryPaths( + Args, + GetGCCLibAndIncVersion(), + GetTargetCPU(Args), + InstalledDir, + LibPaths); +} + +Hexagon_TC::~Hexagon_TC() { +} + +Tool *Hexagon_TC::buildAssembler() const { + return new tools::hexagon::Assemble(*this); +} + +Tool *Hexagon_TC::buildLinker() const { + return new tools::hexagon::Link(*this); +} + +void Hexagon_TC::AddClangSystemIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + const Driver &D = getDriver(); + + if (DriverArgs.hasArg(options::OPT_nostdinc) || + DriverArgs.hasArg(options::OPT_nostdlibinc)) + return; + + llvm::sys::Path InstallDir(D.InstalledDir); + std::string Ver(GetGCCLibAndIncVersion()); + std::string GnuDir = Hexagon_TC::GetGnuDir(D.InstalledDir); + std::string HexagonDir(GnuDir + "/lib/gcc/hexagon/" + Ver); + addExternCSystemInclude(DriverArgs, CC1Args, HexagonDir + "/include"); + addExternCSystemInclude(DriverArgs, CC1Args, HexagonDir + "/include-fixed"); + addExternCSystemInclude(DriverArgs, CC1Args, GnuDir + "/hexagon/include"); +} + +void Hexagon_TC::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + + if (DriverArgs.hasArg(options::OPT_nostdlibinc) || + DriverArgs.hasArg(options::OPT_nostdincxx)) + return; + + const Driver &D = getDriver(); + std::string Ver(GetGCCLibAndIncVersion()); + llvm::sys::Path IncludeDir(Hexagon_TC::GetGnuDir(D.InstalledDir)); + + IncludeDir.appendComponent("hexagon/include/c++/"); + IncludeDir.appendComponent(Ver); + addSystemInclude(DriverArgs, CC1Args, IncludeDir.str()); +} + +ToolChain::CXXStdlibType +Hexagon_TC::GetCXXStdlibType(const ArgList &Args) const { + Arg *A = Args.getLastArg(options::OPT_stdlib_EQ); + if (!A) + return ToolChain::CST_Libstdcxx; + + StringRef Value = A->getValue(); + if (Value != "libstdc++") { + getDriver().Diag(diag::err_drv_invalid_stdlib_name) + << A->getAsString(Args); + } + + return ToolChain::CST_Libstdcxx; +} + +static Arg *GetLastHexagonArchArg(const ArgList &Args) +{ + Arg *A = NULL; + + for (ArgList::const_iterator it = Args.begin(), ie = Args.end(); + it != ie; ++it) { + if ((*it)->getOption().matches(options::OPT_march_EQ) || + (*it)->getOption().matches(options::OPT_mcpu_EQ)) { + A = *it; + A->claim(); + } else if ((*it)->getOption().matches(options::OPT_m_Joined)) { + StringRef Value = (*it)->getValue(0); + if (Value.startswith("v")) { + A = *it; + A->claim(); + } + } + } + return A; +} + +StringRef Hexagon_TC::GetTargetCPU(const ArgList &Args) +{ + // Select the default CPU (v4) if none was given or detection failed. + Arg *A = GetLastHexagonArchArg (Args); + if (A) { + StringRef WhichHexagon = A->getValue(); + if (WhichHexagon.startswith("hexagon")) + return WhichHexagon.substr(sizeof("hexagon") - 1); + if (WhichHexagon != "") + return WhichHexagon; + } + + return "v4"; +} +// End Hexagon + +/// TCEToolChain - A tool chain using the llvm bitcode tools to perform +/// all subcommands. See http://tce.cs.tut.fi for our peculiar target. +/// Currently does not support anything else but compilation. + +TCEToolChain::TCEToolChain(const Driver &D, const llvm::Triple& Triple, + const ArgList &Args) + : ToolChain(D, Triple, Args) { + // Path mangling to find libexec + std::string Path(getDriver().Dir); + + Path += "/../libexec"; + getProgramPaths().push_back(Path); +} + +TCEToolChain::~TCEToolChain() { +} + +bool TCEToolChain::IsMathErrnoDefault() const { + return true; +} + +bool TCEToolChain::isPICDefault() const { + return false; +} + +bool TCEToolChain::isPICDefaultForced() const { + return false; +} + +/// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly. + +OpenBSD::OpenBSD(const Driver &D, const llvm::Triple& Triple, const ArgList &Args) + : Generic_ELF(D, Triple, Args) { + getFilePaths().push_back(getDriver().Dir + "/../lib"); + getFilePaths().push_back("/usr/lib"); +} + +Tool *OpenBSD::buildAssembler() const { + return new tools::openbsd::Assemble(*this); +} + +Tool *OpenBSD::buildLinker() const { + return new tools::openbsd::Link(*this); +} + +/// Bitrig - Bitrig tool chain which can call as(1) and ld(1) directly. + +Bitrig::Bitrig(const Driver &D, const llvm::Triple& Triple, const ArgList &Args) + : Generic_ELF(D, Triple, Args) { + getFilePaths().push_back(getDriver().Dir + "/../lib"); + getFilePaths().push_back("/usr/lib"); +} + +Tool *Bitrig::buildAssembler() const { + return new tools::bitrig::Assemble(*this); +} + +Tool *Bitrig::buildLinker() const { + return new tools::bitrig::Link(*this); +} + +void Bitrig::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + if (DriverArgs.hasArg(options::OPT_nostdlibinc) || + DriverArgs.hasArg(options::OPT_nostdincxx)) + return; + + switch (GetCXXStdlibType(DriverArgs)) { + case ToolChain::CST_Libcxx: + addSystemInclude(DriverArgs, CC1Args, + getDriver().SysRoot + "/usr/include/c++/"); + break; + case ToolChain::CST_Libstdcxx: + addSystemInclude(DriverArgs, CC1Args, + getDriver().SysRoot + "/usr/include/c++/stdc++"); + addSystemInclude(DriverArgs, CC1Args, + getDriver().SysRoot + "/usr/include/c++/stdc++/backward"); + + StringRef Triple = getTriple().str(); + if (Triple.startswith("amd64")) + addSystemInclude(DriverArgs, CC1Args, + getDriver().SysRoot + "/usr/include/c++/stdc++/x86_64" + + Triple.substr(5)); + else + addSystemInclude(DriverArgs, CC1Args, + getDriver().SysRoot + "/usr/include/c++/stdc++/" + + Triple); + break; + } +} + +void Bitrig::AddCXXStdlibLibArgs(const ArgList &Args, + ArgStringList &CmdArgs) const { + switch (GetCXXStdlibType(Args)) { + case ToolChain::CST_Libcxx: + CmdArgs.push_back("-lc++"); + CmdArgs.push_back("-lcxxrt"); + // Include supc++ to provide Unwind until provided by libcxx. + CmdArgs.push_back("-lgcc"); + break; + case ToolChain::CST_Libstdcxx: + CmdArgs.push_back("-lstdc++"); + break; + } +} + +/// FreeBSD - FreeBSD tool chain which can call as(1) and ld(1) directly. + +FreeBSD::FreeBSD(const Driver &D, const llvm::Triple& Triple, const ArgList &Args) + : Generic_ELF(D, Triple, Args) { + + // When targeting 32-bit platforms, look for '/usr/lib32/crt1.o' and fall + // back to '/usr/lib' if it doesn't exist. + if ((Triple.getArch() == llvm::Triple::x86 || + Triple.getArch() == llvm::Triple::ppc) && + llvm::sys::fs::exists(getDriver().SysRoot + "/usr/lib32/crt1.o")) + getFilePaths().push_back(getDriver().SysRoot + "/usr/lib32"); + else + getFilePaths().push_back(getDriver().SysRoot + "/usr/lib"); +} + +Tool *FreeBSD::buildAssembler() const { + return new tools::freebsd::Assemble(*this); +} + +Tool *FreeBSD::buildLinker() const { + return new tools::freebsd::Link(*this); +} + +bool FreeBSD::UseSjLjExceptions() const { + // FreeBSD uses SjLj exceptions on ARM oabi. + switch (getTriple().getEnvironment()) { + case llvm::Triple::GNUEABI: + case llvm::Triple::EABI: + return false; + + default: + return (getTriple().getArch() == llvm::Triple::arm || + getTriple().getArch() == llvm::Triple::thumb); + } +} + +/// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly. + +NetBSD::NetBSD(const Driver &D, const llvm::Triple& Triple, const ArgList &Args) + : Generic_ELF(D, Triple, Args) { + + if (getDriver().UseStdLib) { + // When targeting a 32-bit platform, try the special directory used on + // 64-bit hosts, and only fall back to the main library directory if that + // doesn't work. + // FIXME: It'd be nicer to test if this directory exists, but I'm not sure + // what all logic is needed to emulate the '=' prefix here. + if (Triple.getArch() == llvm::Triple::x86) + getFilePaths().push_back("=/usr/lib/i386"); + + getFilePaths().push_back("=/usr/lib"); + } +} + +Tool *NetBSD::buildAssembler() const { + return new tools::netbsd::Assemble(*this); +} + +Tool *NetBSD::buildLinker() const { + return new tools::netbsd::Link(*this); +} + +/// Minix - Minix tool chain which can call as(1) and ld(1) directly. + +Minix::Minix(const Driver &D, const llvm::Triple& Triple, const ArgList &Args) + : Generic_ELF(D, Triple, Args) { + getFilePaths().push_back(getDriver().Dir + "/../lib"); + getFilePaths().push_back("/usr/lib"); +} + +Tool *Minix::buildAssembler() const { + return new tools::minix::Assemble(*this); +} + +Tool *Minix::buildLinker() const { + return new tools::minix::Link(*this); +} + +/// AuroraUX - AuroraUX tool chain which can call as(1) and ld(1) directly. + +AuroraUX::AuroraUX(const Driver &D, const llvm::Triple& Triple, + const ArgList &Args) + : Generic_GCC(D, Triple, Args) { + + getProgramPaths().push_back(getDriver().getInstalledDir()); + if (getDriver().getInstalledDir() != getDriver().Dir) + getProgramPaths().push_back(getDriver().Dir); + + getFilePaths().push_back(getDriver().Dir + "/../lib"); + getFilePaths().push_back("/usr/lib"); + getFilePaths().push_back("/usr/sfw/lib"); + getFilePaths().push_back("/opt/gcc4/lib"); + getFilePaths().push_back("/opt/gcc4/lib/gcc/i386-pc-solaris2.11/4.2.4"); + +} + +Tool *AuroraUX::buildAssembler() const { + return new tools::auroraux::Assemble(*this); +} + +Tool *AuroraUX::buildLinker() const { + return new tools::auroraux::Link(*this); +} + +/// Solaris - Solaris tool chain which can call as(1) and ld(1) directly. + +Solaris::Solaris(const Driver &D, const llvm::Triple& Triple, + const ArgList &Args) + : Generic_GCC(D, Triple, Args) { + + getProgramPaths().push_back(getDriver().getInstalledDir()); + if (getDriver().getInstalledDir() != getDriver().Dir) + getProgramPaths().push_back(getDriver().Dir); + + getFilePaths().push_back(getDriver().Dir + "/../lib"); + getFilePaths().push_back("/usr/lib"); +} + +Tool *Solaris::buildAssembler() const { + return new tools::solaris::Assemble(*this); +} + +Tool *Solaris::buildLinker() const { + return new tools::solaris::Link(*this); +} + +/// Distribution (very bare-bones at the moment). + +enum Distro { + ArchLinux, + DebianLenny, + DebianSqueeze, + DebianWheezy, + DebianJessie, + Exherbo, + RHEL4, + RHEL5, + RHEL6, + Fedora13, + Fedora14, + Fedora15, + Fedora16, + FedoraRawhide, + OpenSuse11_3, + OpenSuse11_4, + OpenSuse12_1, + OpenSuse12_2, + UbuntuHardy, + UbuntuIntrepid, + UbuntuJaunty, + UbuntuKarmic, + UbuntuLucid, + UbuntuMaverick, + UbuntuNatty, + UbuntuOneiric, + UbuntuPrecise, + UbuntuQuantal, + UbuntuRaring, + UnknownDistro +}; + +static bool IsRedhat(enum Distro Distro) { + return (Distro >= Fedora13 && Distro <= FedoraRawhide) || + (Distro >= RHEL4 && Distro <= RHEL6); +} + +static bool IsOpenSuse(enum Distro Distro) { + return Distro >= OpenSuse11_3 && Distro <= OpenSuse12_2; +} + +static bool IsDebian(enum Distro Distro) { + return Distro >= DebianLenny && Distro <= DebianJessie; +} + +static bool IsUbuntu(enum Distro Distro) { + return Distro >= UbuntuHardy && Distro <= UbuntuRaring; +} + +static Distro DetectDistro(llvm::Triple::ArchType Arch) { + OwningPtr<llvm::MemoryBuffer> File; + if (!llvm::MemoryBuffer::getFile("/etc/lsb-release", File)) { + StringRef Data = File.get()->getBuffer(); + SmallVector<StringRef, 8> Lines; + Data.split(Lines, "\n"); + Distro Version = UnknownDistro; + for (unsigned i = 0, s = Lines.size(); i != s; ++i) + if (Version == UnknownDistro && Lines[i].startswith("DISTRIB_CODENAME=")) + Version = llvm::StringSwitch<Distro>(Lines[i].substr(17)) + .Case("hardy", UbuntuHardy) + .Case("intrepid", UbuntuIntrepid) + .Case("jaunty", UbuntuJaunty) + .Case("karmic", UbuntuKarmic) + .Case("lucid", UbuntuLucid) + .Case("maverick", UbuntuMaverick) + .Case("natty", UbuntuNatty) + .Case("oneiric", UbuntuOneiric) + .Case("precise", UbuntuPrecise) + .Case("quantal", UbuntuQuantal) + .Case("raring", UbuntuRaring) + .Default(UnknownDistro); + return Version; + } + + if (!llvm::MemoryBuffer::getFile("/etc/redhat-release", File)) { + StringRef Data = File.get()->getBuffer(); + if (Data.startswith("Fedora release 16")) + return Fedora16; + else if (Data.startswith("Fedora release 15")) + return Fedora15; + else if (Data.startswith("Fedora release 14")) + return Fedora14; + else if (Data.startswith("Fedora release 13")) + return Fedora13; + else if (Data.startswith("Fedora release") && + Data.find("Rawhide") != StringRef::npos) + return FedoraRawhide; + else if (Data.startswith("Red Hat Enterprise Linux") && + Data.find("release 6") != StringRef::npos) + return RHEL6; + else if ((Data.startswith("Red Hat Enterprise Linux") || + Data.startswith("CentOS")) && + Data.find("release 5") != StringRef::npos) + return RHEL5; + else if ((Data.startswith("Red Hat Enterprise Linux") || + Data.startswith("CentOS")) && + Data.find("release 4") != StringRef::npos) + return RHEL4; + return UnknownDistro; + } + + if (!llvm::MemoryBuffer::getFile("/etc/debian_version", File)) { + StringRef Data = File.get()->getBuffer(); + if (Data[0] == '5') + return DebianLenny; + else if (Data.startswith("squeeze/sid") || Data[0] == '6') + return DebianSqueeze; + else if (Data.startswith("wheezy/sid") || Data[0] == '7') + return DebianWheezy; + else if (Data.startswith("jessie/sid") || Data[0] == '8') + return DebianJessie; + return UnknownDistro; + } + + if (!llvm::MemoryBuffer::getFile("/etc/SuSE-release", File)) + return llvm::StringSwitch<Distro>(File.get()->getBuffer()) + .StartsWith("openSUSE 11.3", OpenSuse11_3) + .StartsWith("openSUSE 11.4", OpenSuse11_4) + .StartsWith("openSUSE 12.1", OpenSuse12_1) + .StartsWith("openSUSE 12.2", OpenSuse12_2) + .Default(UnknownDistro); + + bool Exists; + if (!llvm::sys::fs::exists("/etc/exherbo-release", Exists) && Exists) + return Exherbo; + + if (!llvm::sys::fs::exists("/etc/arch-release", Exists) && Exists) + return ArchLinux; + + return UnknownDistro; +} + +/// \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 llvm::Triple TargetTriple, + StringRef SysRoot) { + // For most architectures, just use whatever we have rather than trying to be + // clever. + switch (TargetTriple.getArch()) { + default: + return TargetTriple.str(); + + // 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 (TargetTriple.getEnvironment() == llvm::Triple::GNUEABIHF) { + if (llvm::sys::fs::exists(SysRoot + "/lib/arm-linux-gnueabihf")) + return "arm-linux-gnueabihf"; + } else { + if (llvm::sys::fs::exists(SysRoot + "/lib/arm-linux-gnueabi")) + return "arm-linux-gnueabi"; + } + return TargetTriple.str(); + case llvm::Triple::x86: + if (llvm::sys::fs::exists(SysRoot + "/lib/i386-linux-gnu")) + return "i386-linux-gnu"; + return TargetTriple.str(); + case llvm::Triple::x86_64: + if (llvm::sys::fs::exists(SysRoot + "/lib/x86_64-linux-gnu")) + return "x86_64-linux-gnu"; + return TargetTriple.str(); + case llvm::Triple::aarch64: + if (llvm::sys::fs::exists(SysRoot + "/lib/aarch64-linux-gnu")) + return "aarch64-linux-gnu"; + case llvm::Triple::mips: + if (llvm::sys::fs::exists(SysRoot + "/lib/mips-linux-gnu")) + return "mips-linux-gnu"; + return TargetTriple.str(); + case llvm::Triple::mipsel: + if (llvm::sys::fs::exists(SysRoot + "/lib/mipsel-linux-gnu")) + return "mipsel-linux-gnu"; + return TargetTriple.str(); + case llvm::Triple::ppc: + if (llvm::sys::fs::exists(SysRoot + "/lib/powerpc-linux-gnuspe")) + return "powerpc-linux-gnuspe"; + if (llvm::sys::fs::exists(SysRoot + "/lib/powerpc-linux-gnu")) + return "powerpc-linux-gnu"; + return TargetTriple.str(); + case llvm::Triple::ppc64: + if (llvm::sys::fs::exists(SysRoot + "/lib/powerpc64-linux-gnu")) + return "powerpc64-linux-gnu"; + return TargetTriple.str(); + } +} + +static void addPathIfExists(Twine Path, ToolChain::path_list &Paths) { + if (llvm::sys::fs::exists(Path)) Paths.push_back(Path.str()); +} + +static bool isMipsArch(llvm::Triple::ArchType Arch) { + return Arch == llvm::Triple::mips || + Arch == llvm::Triple::mipsel || + Arch == llvm::Triple::mips64 || + Arch == llvm::Triple::mips64el; +} + +static bool isMipsR2Arch(llvm::Triple::ArchType Arch, + const ArgList &Args) { + if (Arch != llvm::Triple::mips && + Arch != llvm::Triple::mipsel) + return false; + + Arg *A = Args.getLastArg(options::OPT_march_EQ, + options::OPT_mcpu_EQ, + options::OPT_mips_CPUs_Group); + + if (!A) + return false; + + if (A->getOption().matches(options::OPT_mips_CPUs_Group)) + return A->getOption().matches(options::OPT_mips32r2); + + return A->getValue() == StringRef("mips32r2"); +} + +static StringRef getMultilibDir(const llvm::Triple &Triple, + const ArgList &Args) { + if (!isMipsArch(Triple.getArch())) + return Triple.isArch32Bit() ? "lib32" : "lib64"; + + // 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 (hasMipsN32ABIArg(Args)) + return "lib32"; + + return Triple.isArch32Bit() ? "lib" : "lib64"; +} + +Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) + : Generic_ELF(D, Triple, Args) { + llvm::Triple::ArchType Arch = Triple.getArch(); + const std::string &SysRoot = getDriver().SysRoot; + + // OpenSuse stores the linker with the compiler, add that to the search + // path. + ToolChain::path_list &PPaths = getProgramPaths(); + PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" + + GCCInstallation.getTriple().str() + "/bin").str()); + + Linker = GetProgramPath("ld"); + + Distro Distro = DetectDistro(Arch); + + if (IsOpenSuse(Distro) || IsUbuntu(Distro)) { + 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.getEnvironment() == llvm::Triple::Android; + + // 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. + if (!isMipsArch(Arch) && !IsAndroid) { + if (IsRedhat(Distro) || IsOpenSuse(Distro) || + (IsUbuntu(Distro) && Distro >= UbuntuMaverick)) + ExtraOpts.push_back("--hash-style=gnu"); + + if (IsDebian(Distro) || IsOpenSuse(Distro) || Distro == UbuntuLucid || + Distro == UbuntuJaunty || Distro == UbuntuKarmic) + ExtraOpts.push_back("--hash-style=both"); + } + + if (IsRedhat(Distro)) + ExtraOpts.push_back("--no-add-needed"); + + if (Distro == DebianSqueeze || Distro == DebianWheezy || + Distro == DebianJessie || IsOpenSuse(Distro) || + (IsRedhat(Distro) && Distro != RHEL4 && Distro != RHEL5) || + (IsUbuntu(Distro) && Distro >= UbuntuKarmic)) + ExtraOpts.push_back("--build-id"); + + if (IsOpenSuse(Distro)) + 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 Multilib = getMultilibDir(Triple, Args); + const std::string MultiarchTriple = getMultiarchTriple(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(); + + if (IsAndroid && isMipsR2Arch(Triple.getArch(), Args)) + addPathIfExists(GCCInstallation.getInstallPath() + + GCCInstallation.getMultiarchSuffix() + + "/mips-r2", + Paths); + else + addPathIfExists((GCCInstallation.getInstallPath() + + GCCInstallation.getMultiarchSuffix()), + 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. + if (StringRef(LibPath).startswith(SysRoot)) { + addPathIfExists(LibPath + "/../" + GCCTriple.str() + "/lib/../" + Multilib, + Paths); + addPathIfExists(LibPath + "/" + MultiarchTriple, Paths); + addPathIfExists(LibPath + "/../" + Multilib, Paths); + } + // On Android, libraries in the parent prefix of the GCC installation are + // preferred to the ones under sysroot. + if (IsAndroid) { + addPathIfExists(LibPath + "/../" + GCCTriple.str() + "/lib", Paths); + } + } + addPathIfExists(SysRoot + "/lib/" + MultiarchTriple, Paths); + addPathIfExists(SysRoot + "/lib/../" + Multilib, Paths); + addPathIfExists(SysRoot + "/usr/lib/" + MultiarchTriple, Paths); + addPathIfExists(SysRoot + "/usr/lib/../" + Multilib, Paths); + + // Try walking via the GCC triple path in case of multiarch GCC + // installations with strange symlinks. + if (GCCInstallation.isValid()) + addPathIfExists(SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() + + "/../../" + Multilib, Paths); + + // Add the non-multilib suffixed paths (if potentially different). + if (GCCInstallation.isValid()) { + const std::string &LibPath = GCCInstallation.getParentLibPath(); + const llvm::Triple &GCCTriple = GCCInstallation.getTriple(); + if (!GCCInstallation.getMultiarchSuffix().empty()) + addPathIfExists(GCCInstallation.getInstallPath(), Paths); + + if (StringRef(LibPath).startswith(SysRoot)) { + addPathIfExists(LibPath + "/../" + GCCTriple.str() + "/lib", Paths); + addPathIfExists(LibPath, Paths); + } + } + addPathIfExists(SysRoot + "/lib", Paths); + addPathIfExists(SysRoot + "/usr/lib", Paths); +} + +bool Linux::HasNativeLLVMSupport() const { + return true; +} + +Tool *Linux::buildLinker() const { + return new tools::gnutools::Link(*this); +} + +Tool *Linux::buildAssembler() const { + return new tools::gnutools::Assemble(*this); +} + +void Linux::addClangTargetOptions(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + const Generic_GCC::GCCVersion &V = GCCInstallation.getVersion(); + bool UseInitArrayDefault + = V >= Generic_GCC::GCCVersion::Parse("4.7.0") || + getTriple().getArch() == llvm::Triple::aarch64 || + getTriple().getEnvironment() == llvm::Triple::Android; + if (DriverArgs.hasFlag(options::OPT_fuse_init_array, + options::OPT_fno_use_init_array, + UseInitArrayDefault)) + CC1Args.push_back("-fuse-init-array"); +} + +void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + const Driver &D = getDriver(); + + if (DriverArgs.hasArg(options::OPT_nostdinc)) + return; + + if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) + addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/local/include"); + + if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { + llvm::sys::Path P(D.ResourceDir); + P.appendComponent("include"); + addSystemInclude(DriverArgs, CC1Args, P.str()); + } + + 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 (SmallVectorImpl<StringRef>::iterator I = dirs.begin(), E = dirs.end(); + I != E; ++I) { + StringRef Prefix = llvm::sys::path::is_absolute(*I) ? D.SysRoot : ""; + addExternCSystemInclude(DriverArgs, CC1Args, Prefix + *I); + } + return; + } + + // Lacking those, try to detect the correct set of system includes for the + // target triple. + + // 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 MIPSMultiarchIncludeDirs[] = { + "/usr/include/mips-linux-gnu" + }; + const StringRef MIPSELMultiarchIncludeDirs[] = { + "/usr/include/mipsel-linux-gnu" + }; + const StringRef PPCMultiarchIncludeDirs[] = { + "/usr/include/powerpc-linux-gnu" + }; + const StringRef PPC64MultiarchIncludeDirs[] = { + "/usr/include/powerpc64-linux-gnu" + }; + ArrayRef<StringRef> MultiarchIncludeDirs; + if (getTriple().getArch() == llvm::Triple::x86_64) { + MultiarchIncludeDirs = X86_64MultiarchIncludeDirs; + } else if (getTriple().getArch() == llvm::Triple::x86) { + MultiarchIncludeDirs = X86MultiarchIncludeDirs; + } else if (getTriple().getArch() == llvm::Triple::aarch64) { + MultiarchIncludeDirs = AArch64MultiarchIncludeDirs; + } else if (getTriple().getArch() == llvm::Triple::arm) { + if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF) + MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs; + else + MultiarchIncludeDirs = ARMMultiarchIncludeDirs; + } else if (getTriple().getArch() == llvm::Triple::mips) { + MultiarchIncludeDirs = MIPSMultiarchIncludeDirs; + } else if (getTriple().getArch() == llvm::Triple::mipsel) { + MultiarchIncludeDirs = MIPSELMultiarchIncludeDirs; + } else if (getTriple().getArch() == llvm::Triple::ppc) { + MultiarchIncludeDirs = PPCMultiarchIncludeDirs; + } else if (getTriple().getArch() == llvm::Triple::ppc64) { + MultiarchIncludeDirs = PPC64MultiarchIncludeDirs; + } + for (ArrayRef<StringRef>::iterator I = MultiarchIncludeDirs.begin(), + E = MultiarchIncludeDirs.end(); + I != E; ++I) { + if (llvm::sys::fs::exists(D.SysRoot + *I)) { + addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + *I); + 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, D.SysRoot + "/include"); + + addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/include"); +} + +/// \brief Helper to add the three variant paths for a libstdc++ installation. +/*static*/ bool Linux::addLibStdCXXIncludePaths(Twine Base, Twine TargetArchDir, + const ArgList &DriverArgs, + ArgStringList &CC1Args) { + if (!llvm::sys::fs::exists(Base)) + return false; + addSystemInclude(DriverArgs, CC1Args, Base); + addSystemInclude(DriverArgs, CC1Args, Base + "/" + TargetArchDir); + addSystemInclude(DriverArgs, CC1Args, Base + "/backward"); + return true; +} + +/// \brief Helper to add an extra variant path for an (Ubuntu) multilib +/// libstdc++ installation. +/*static*/ bool Linux::addLibStdCXXIncludePaths(Twine Base, Twine Suffix, + Twine TargetArchDir, + Twine MultiLibSuffix, + const ArgList &DriverArgs, + ArgStringList &CC1Args) { + if (!addLibStdCXXIncludePaths(Base+Suffix, TargetArchDir + MultiLibSuffix, + DriverArgs, CC1Args)) + return false; + + addSystemInclude(DriverArgs, CC1Args, Base + "/" + TargetArchDir + Suffix + + MultiLibSuffix); + return true; +} + +void Linux::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + if (DriverArgs.hasArg(options::OPT_nostdlibinc) || + DriverArgs.hasArg(options::OPT_nostdincxx)) + return; + + // Check if libc++ has been enabled and provide its include paths if so. + if (GetCXXStdlibType(DriverArgs) == ToolChain::CST_Libcxx) { + // libc++ is always installed at a fixed path on Linux currently. + addSystemInclude(DriverArgs, CC1Args, + getDriver().SysRoot + "/usr/include/c++/v1"); + return; + } + + // We need a detected GCC installation on Linux to provide libstdc++'s + // headers. We handled the libc++ case above. + 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 Version = GCCInstallation.getVersion().Text; + StringRef TripleStr = GCCInstallation.getTriple().str(); + + if (addLibStdCXXIncludePaths(LibDir.str() + "/../include", + "/c++/" + Version.str(), + TripleStr, + GCCInstallation.getMultiarchSuffix(), + DriverArgs, CC1Args)) + return; + + const std::string IncludePathCandidates[] = { + // Gentoo is weird and places its headers inside the GCC install, so if the + // first attempt to find the headers fails, try this pattern. + InstallDir.str() + "/include/g++-v4", + // Android standalone toolchain has C++ headers in yet another place. + LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.str(), + // Freescale SDK C++ headers are directly in <sysroot>/usr/include/c++, + // without a subdirectory corresponding to the gcc version. + LibDir.str() + "/../include/c++", + }; + + for (unsigned i = 0; i < llvm::array_lengthof(IncludePathCandidates); ++i) { + if (addLibStdCXXIncludePaths(IncludePathCandidates[i], (TripleStr + + GCCInstallation.getMultiarchSuffix()), + DriverArgs, CC1Args)) + break; + } +} + +/// DragonFly - DragonFly tool chain which can call as(1) and ld(1) directly. + +DragonFly::DragonFly(const Driver &D, const llvm::Triple& Triple, const ArgList &Args) + : Generic_ELF(D, Triple, Args) { + + // Path mangling to find libexec + getProgramPaths().push_back(getDriver().getInstalledDir()); + if (getDriver().getInstalledDir() != getDriver().Dir) + getProgramPaths().push_back(getDriver().Dir); + + getFilePaths().push_back(getDriver().Dir + "/../lib"); + getFilePaths().push_back("/usr/lib"); + getFilePaths().push_back("/usr/lib/gcc41"); +} + +Tool *DragonFly::buildAssembler() const { + return new tools::dragonfly::Assemble(*this); +} + +Tool *DragonFly::buildLinker() const { + return new tools::dragonfly::Link(*this); +} |
