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ToolChains.cpp
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ToolChains.cpp
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//===--- ToolChains.cpp - ToolChain Implementations -------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ToolChains.h"
#include "clang/Basic/ObjCRuntime.h"
#include "clang/Basic/Version.h"
#include "clang/Basic/VirtualFileSystem.h"
#include "clang/Config/config.h" // for GCC_INSTALL_PREFIX
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/SanitizerArgs.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Option/Option.h"
#include "llvm/ProfileData/InstrProf.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/TargetParser.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdlib> // ::getenv
#include <system_error>
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang;
using namespace llvm::opt;
MachO::MachO(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
: ToolChain(D, Triple, Args) {
// 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);
}
/// Darwin - Darwin tool chain for i386 and x86_64.
Darwin::Darwin(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
: MachO(D, Triple, Args), TargetInitialized(false) {}
types::ID MachO::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 MachO::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 (isTargetIOSBased())
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 (isTargetIOSBased())
return !isIPhoneOSVersionLT(3, 2);
else {
assert(isTargetMacOS() && "unexpected darwin target");
return !isMacosxVersionLT(10, 6);
}
}
// This is just a MachO name translation routine and there's no
// way to join this into ARMTargetParser without breaking all
// other assumptions. Maybe MachO should consider standardising
// their nomenclature.
static const char *ArmMachOArchName(StringRef Arch) {
return llvm::StringSwitch<const char *>(Arch)
.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("armv7k", "armv7-k", "armv7k")
.Cases("armv7m", "armv7-m", "armv7m")
.Cases("armv7s", "armv7-s", "armv7s")
.Default(nullptr);
}
static const char *ArmMachOArchNameCPU(StringRef CPU) {
unsigned ArchKind = llvm::ARM::parseCPUArch(CPU);
if (ArchKind == llvm::ARM::AK_INVALID)
return nullptr;
StringRef Arch = llvm::ARM::getArchName(ArchKind);
// FIXME: Make sure this MachO triple mangling is really necessary.
// ARMv5* normalises to ARMv5.
if (Arch.startswith("armv5"))
Arch = Arch.substr(0, 5);
// ARMv6*, except ARMv6M, normalises to ARMv6.
else if (Arch.startswith("armv6") && !Arch.endswith("6m"))
Arch = Arch.substr(0, 5);
// ARMv7A normalises to ARMv7.
else if (Arch.endswith("v7a"))
Arch = Arch.substr(0, 5);
return Arch.data();
}
static bool isSoftFloatABI(const ArgList &Args) {
Arg *A = Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float,
options::OPT_mfloat_abi_EQ);
if (!A)
return false;
return A->getOption().matches(options::OPT_msoft_float) ||
(A->getOption().matches(options::OPT_mfloat_abi_EQ) &&
A->getValue() == StringRef("soft"));
}
StringRef MachO::getMachOArchName(const ArgList &Args) const {
switch (getTriple().getArch()) {
default:
return getDefaultUniversalArchName();
case llvm::Triple::aarch64:
return "arm64";
case llvm::Triple::thumb:
case llvm::Triple::arm:
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
if (const char *Arch = ArmMachOArchName(A->getValue()))
return Arch;
if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
if (const char *Arch = ArmMachOArchNameCPU(A->getValue()))
return Arch;
return "arm";
}
}
Darwin::~Darwin() {}
MachO::~MachO() {}
std::string MachO::ComputeEffectiveClangTriple(const ArgList &Args,
types::ID InputType) const {
llvm::Triple Triple(ComputeLLVMTriple(Args, InputType));
return Triple.getTriple();
}
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 += isTargetIOSBased() ? "ios" : "macosx";
Str += getTargetVersion().getAsString();
Triple.setOSName(Str);
return Triple.getTriple();
}
void Generic_ELF::anchor() {}
Tool *MachO::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::VerifyDebugInfoJobClass:
if (!VerifyDebug)
VerifyDebug.reset(new tools::darwin::VerifyDebug(*this));
return VerifyDebug.get();
default:
return ToolChain::getTool(AC);
}
}
Tool *MachO::buildLinker() const { return new tools::darwin::Linker(*this); }
Tool *MachO::buildAssembler() const {
return new tools::darwin::Assembler(*this);
}
DarwinClang::DarwinClang(const Driver &D, const llvm::Triple &Triple,
const ArgList &Args)
: Darwin(D, Triple, Args) {}
void DarwinClang::addClangWarningOptions(ArgStringList &CC1Args) const {
// For iOS, 64-bit, promote certain warnings to errors.
if (!isTargetMacOS() && getTriple().isArch64Bit()) {
// Always enable -Wdeprecated-objc-isa-usage and promote it
// to an error.
CC1Args.push_back("-Wdeprecated-objc-isa-usage");
CC1Args.push_back("-Werror=deprecated-objc-isa-usage");
// Also error about implicit function declarations, as that
// can impact calling conventions.
CC1Args.push_back("-Werror=implicit-function-declaration");
}
}
/// \brief Determine whether Objective-C automated reference counting is
/// enabled.
static bool isObjCAutoRefCount(const ArgList &Args) {
return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false);
}
void DarwinClang::AddLinkARCArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
// Avoid linking compatibility stubs on i386 mac.
if (isTargetMacOS() && getArch() == llvm::Triple::x86)
return;
ObjCRuntime runtime = getDefaultObjCRuntime(/*nonfragile*/ true);
if ((runtime.hasNativeARC() || !isObjCAutoRefCount(Args)) &&
runtime.hasSubscripting())
return;
CmdArgs.push_back("-force_load");
SmallString<128> P(getDriver().ClangExecutable);
llvm::sys::path::remove_filename(P); // 'clang'
llvm::sys::path::remove_filename(P); // 'bin'
llvm::sys::path::append(P, "lib", "arc", "libarclite_");
// Mash in the platform.
if (isTargetIOSSimulator())
P += "iphonesimulator";
else if (isTargetIPhoneOS())
P += "iphoneos";
else
P += "macosx";
P += ".a";
CmdArgs.push_back(Args.MakeArgString(P));
}
void MachO::AddLinkRuntimeLib(const ArgList &Args, ArgStringList &CmdArgs,
StringRef DarwinLibName, bool AlwaysLink,
bool IsEmbedded, bool AddRPath) const {
SmallString<128> Dir(getDriver().ResourceDir);
llvm::sys::path::append(Dir, "lib", IsEmbedded ? "macho_embedded" : "darwin");
SmallString<128> P(Dir);
llvm::sys::path::append(P, DarwinLibName);
// 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).
if (AlwaysLink || getVFS().exists(P))
CmdArgs.push_back(Args.MakeArgString(P));
// Adding the rpaths might negatively interact when other rpaths are involved,
// so we should make sure we add the rpaths last, after all user-specified
// rpaths. This is currently true from this place, but we need to be
// careful if this function is ever called before user's rpaths are emitted.
if (AddRPath) {
assert(DarwinLibName.endswith(".dylib") && "must be a dynamic library");
// Add @executable_path to rpath to support having the dylib copied with
// the executable.
CmdArgs.push_back("-rpath");
CmdArgs.push_back("@executable_path");
// Add the path to the resource dir to rpath to support using the dylib
// from the default location without copying.
CmdArgs.push_back("-rpath");
CmdArgs.push_back(Args.MakeArgString(Dir));
}
}
void Darwin::addProfileRTLibs(const ArgList &Args,
ArgStringList &CmdArgs) const {
if (!needsProfileRT(Args)) return;
// Select the appropriate runtime library for the target.
if (isTargetIOSBased())
AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.profile_ios.a",
/*AlwaysLink*/ true);
else
AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.profile_osx.a",
/*AlwaysLink*/ true);
return;
}
void DarwinClang::AddLinkSanitizerLibArgs(const ArgList &Args,
ArgStringList &CmdArgs,
StringRef Sanitizer) const {
if (!Args.hasArg(options::OPT_dynamiclib) &&
!Args.hasArg(options::OPT_bundle)) {
// Sanitizer runtime libraries requires C++.
AddCXXStdlibLibArgs(Args, CmdArgs);
}
assert(isTargetMacOS() || isTargetIOSSimulator());
StringRef OS = isTargetMacOS() ? "osx" : "iossim";
AddLinkRuntimeLib(
Args, CmdArgs,
(Twine("libclang_rt.") + Sanitizer + "_" + OS + "_dynamic.dylib").str(),
/*AlwaysLink*/ true, /*IsEmbedded*/ false,
/*AddRPath*/ true);
if (GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) {
// Add explicit dependcy on -lc++abi, as -lc++ doesn't re-export
// all RTTI-related symbols that UBSan uses.
CmdArgs.push_back("-lc++abi");
}
}
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;
}
const SanitizerArgs &Sanitize = getSanitizerArgs();
if (Sanitize.needsAsanRt())
AddLinkSanitizerLibArgs(Args, CmdArgs, "asan");
if (Sanitize.needsUbsanRt())
AddLinkSanitizerLibArgs(Args, CmdArgs, "ubsan");
// 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 (isTargetIOSBased()) {
// 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() &&
getTriple().getArch() != llvm::Triple::aarch64)
CmdArgs.push_back("-lgcc_s.1");
// We currently always need a static runtime library for iOS.
AddLinkRuntimeLib(Args, CmdArgs, "libclang_rt.ios.a");
} else {
assert(isTargetMacOS() && "unexpected non MacOS platform");
// 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.
if (!getVFS().exists(A->getValue()))
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) && getVFS().exists(env) &&
StringRef(env) != "/") {
Args.append(Args.MakeSeparateArg(
nullptr, 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);
if (OSXVersion && iOSVersion) {
getDriver().Diag(diag::err_drv_argument_not_allowed_with)
<< OSXVersion->getAsString(Args) << iOSVersion->getAsString(Args);
iOSVersion = nullptr;
} else if (!OSXVersion && !iOSVersion) {
// If no deployment target was specified on the command line, check for
// environment defines.
std::string OSXTarget;
std::string iOSTarget;
if (char *env = ::getenv("MACOSX_DEPLOYMENT_TARGET"))
OSXTarget = env;
if (char *env = ::getenv("IPHONEOS_DEPLOYMENT_TARGET"))
iOSTarget = env;
// If there is no command-line argument to specify the Target version and
// no environment variable defined, see if we can set the default based
// on -isysroot.
if (iOSTarget.empty() && OSXTarget.empty() &&
Args.hasArg(options::OPT_isysroot)) {
if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) {
StringRef isysroot = A->getValue();
// Assume SDK has path: SOME_PATH/SDKs/PlatformXX.YY.sdk
size_t BeginSDK = isysroot.rfind("SDKs/");
size_t EndSDK = isysroot.rfind(".sdk");
if (BeginSDK != StringRef::npos && EndSDK != StringRef::npos) {
StringRef SDK = isysroot.slice(BeginSDK + 5, EndSDK);
// Slice the version number out.
// Version number is between the first and the last number.
size_t StartVer = SDK.find_first_of("0123456789");
size_t EndVer = SDK.find_last_of("0123456789");
if (StartVer != StringRef::npos && EndVer > StartVer) {
StringRef Version = SDK.slice(StartVer, EndVer + 1);
if (SDK.startswith("iPhoneOS") ||
SDK.startswith("iPhoneSimulator"))
iOSTarget = Version;
else if (SDK.startswith("MacOSX"))
OSXTarget = Version;
}
}
}
}
// If no OSX or iOS target has been specified, try to guess platform
// from arch name and compute the version from the triple.
if (OSXTarget.empty() && iOSTarget.empty()) {
StringRef MachOArchName = getMachOArchName(Args);
unsigned Major, Minor, Micro;
if (MachOArchName == "armv7" || MachOArchName == "armv7s" ||
MachOArchName == "arm64") {
getTriple().getiOSVersion(Major, Minor, Micro);
llvm::raw_string_ostream(iOSTarget) << Major << '.' << Minor << '.'
<< Micro;
} else if (MachOArchName != "armv6m" && MachOArchName != "armv7m" &&
MachOArchName != "armv7em") {
if (!getTriple().getMacOSXVersion(Major, Minor, Micro)) {
getDriver().Diag(diag::err_drv_invalid_darwin_version)
<< getTriple().getOSName();
}
llvm::raw_string_ostream(OSXTarget) << Major << '.' << Minor << '.'
<< Micro;
}
}
// 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::aarch64 ||
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(nullptr, O, OSXTarget);
Args.append(OSXVersion);
} else if (!iOSTarget.empty()) {
const Option O = Opts.getOption(options::OPT_miphoneos_version_min_EQ);
iOSVersion = Args.MakeJoinedArg(nullptr, O, iOSTarget);
Args.append(iOSVersion);
}
}
DarwinPlatformKind Platform;
if (OSXVersion)
Platform = MacOS;
else if (iOSVersion)
Platform = IPhoneOS;
else
llvm_unreachable("Unable to infer Darwin variant");
// Set the tool chain target information.
unsigned Major, Minor, Micro;
bool HadExtra;
if (Platform == MacOS) {
assert(!iOSVersion && "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 if (Platform == IPhoneOS) {
assert(iOSVersion && "Unknown target platform!");
if (!Driver::GetReleaseVersion(iOSVersion->getValue(), Major, Minor, Micro,
HadExtra) ||
HadExtra || Major >= 10 || Minor >= 100 || Micro >= 100)
getDriver().Diag(diag::err_drv_invalid_version_number)
<< iOSVersion->getAsString(Args);
} else
llvm_unreachable("unknown kind of Darwin platform");
// Recognize iOS targets with an x86 architecture as the iOS simulator.
if (iOSVersion && (getTriple().getArch() == llvm::Triple::x86 ||
getTriple().getArch() == llvm::Triple::x86_64))
Platform = IPhoneOSSimulator;
setTarget(Platform, Major, Minor, Micro);
}
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.
if (const Arg *A = Args.getLastArg(options::OPT_isysroot)) {
SmallString<128> P(A->getValue());
llvm::sys::path::append(P, "usr", "lib", "libstdc++.dylib");
if (!getVFS().exists(P)) {
llvm::sys::path::remove_filename(P);
llvm::sys::path::append(P, "libstdc++.6.dylib");
if (getVFS().exists(P)) {
CmdArgs.push_back(Args.MakeArgString(P));
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 (!getVFS().exists("/usr/lib/libstdc++.dylib") &&
getVFS().exists("/usr/lib/libstdc++.6.dylib")) {
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).
SmallString<128> P(getDriver().ResourceDir);
llvm::sys::path::append(P, "lib", "darwin");
// Use the newer cc_kext for iOS ARM after 6.0.
if (isTargetIPhoneOS()) {
llvm::sys::path::append(P, "libclang_rt.cc_kext_ios.a");
} else {
llvm::sys::path::append(P, "libclang_rt.cc_kext.a");
}
// For now, allow missing resource libraries to support developers who may
// not have compiler-rt checked out or integrated into their build.
if (getVFS().exists(P))
CmdArgs.push_back(Args.MakeArgString(P));
}
DerivedArgList *MachO::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 (Arg *A : Args) {
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::getArchTypeForMachOArchName(A->getValue(0));
if (!(XarchArch == getArch() ||
(BoundArch &&
XarchArch ==
tools::darwin::getArchTypeForMachOArchName(BoundArch))))
continue;
Arg *OriginalArg = A;
unsigned Index = Args.getBaseArgs().MakeIndex(A->getValue(1));
unsigned Prev = Index;
std::unique_ptr<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.release();
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 (const char *Value : A->getValues()) {
DAL->AddSeparateArg(
OriginalArg, Opts.getOption(options::OPT_Zlinker_input), Value);
}
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(nullptr, 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(nullptr, MCpu, "601");
else if (Name == "ppc603")
DAL->AddJoinedArg(nullptr, MCpu, "603");
else if (Name == "ppc604")
DAL->AddJoinedArg(nullptr, MCpu, "604");
else if (Name == "ppc604e")
DAL->AddJoinedArg(nullptr, MCpu, "604e");
else if (Name == "ppc750")
DAL->AddJoinedArg(nullptr, MCpu, "750");
else if (Name == "ppc7400")
DAL->AddJoinedArg(nullptr, MCpu, "7400");
else if (Name == "ppc7450")
DAL->AddJoinedArg(nullptr, MCpu, "7450");
else if (Name == "ppc970")
DAL->AddJoinedArg(nullptr, MCpu, "970");
else if (Name == "ppc64" || Name == "ppc64le")
DAL->AddFlagArg(nullptr, Opts.getOption(options::OPT_m64));
else if (Name == "i386")
;
else if (Name == "i486")
DAL->AddJoinedArg(nullptr, MArch, "i486");
else if (Name == "i586")
DAL->AddJoinedArg(nullptr, MArch, "i586");
else if (Name == "i686")
DAL->AddJoinedArg(nullptr, MArch, "i686");
else if (Name == "pentium")
DAL->AddJoinedArg(nullptr, MArch, "pentium");
else if (Name == "pentium2")
DAL->AddJoinedArg(nullptr, MArch, "pentium2");
else if (Name == "pentpro")
DAL->AddJoinedArg(nullptr, MArch, "pentiumpro");
else if (Name == "pentIIm3")
DAL->AddJoinedArg(nullptr, MArch, "pentium2");
else if (Name == "x86_64")
DAL->AddFlagArg(nullptr, Opts.getOption(options::OPT_m64));
else if (Name == "x86_64h") {
DAL->AddFlagArg(nullptr, Opts.getOption(options::OPT_m64));
DAL->AddJoinedArg(nullptr, MArch, "x86_64h");
}
else if (Name == "arm")
DAL->AddJoinedArg(nullptr, MArch, "armv4t");
else if (Name == "armv4t")
DAL->AddJoinedArg(nullptr, MArch, "armv4t");
else if (Name == "armv5")
DAL->AddJoinedArg(nullptr, MArch, "armv5tej");
else if (Name == "xscale")
DAL->AddJoinedArg(nullptr, MArch, "xscale");
else if (Name == "armv6")
DAL->AddJoinedArg(nullptr, MArch, "armv6k");
else if (Name == "armv6m")
DAL->AddJoinedArg(nullptr, MArch, "armv6m");
else if (Name == "armv7")
DAL->AddJoinedArg(nullptr, MArch, "armv7a");
else if (Name == "armv7em")
DAL->AddJoinedArg(nullptr, MArch, "armv7em");
else if (Name == "armv7k")
DAL->AddJoinedArg(nullptr, MArch, "armv7k");
else if (Name == "armv7m")
DAL->AddJoinedArg(nullptr, MArch, "armv7m");
else if (Name == "armv7s")
DAL->AddJoinedArg(nullptr, MArch, "armv7s");
}
return DAL;
}
void MachO::AddLinkRuntimeLibArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
// Embedded targets are simple at the moment, not supporting sanitizers and
// with different libraries for each member of the product { static, PIC } x
// { hard-float, soft-float }
llvm::SmallString<32> CompilerRT = StringRef("libclang_rt.");
CompilerRT +=
(tools::arm::getARMFloatABI(*this, Args) == tools::arm::FloatABI::Hard)
? "hard"
: "soft";
CompilerRT += Args.hasArg(options::OPT_fPIC) ? "_pic.a" : "_static.a";
AddLinkRuntimeLib(Args, CmdArgs, CompilerRT, false, true);
}
DerivedArgList *Darwin::TranslateArgs(const DerivedArgList &Args,
const char *BoundArch) const {
// First get the generic Apple args, before moving onto Darwin-specific ones.
DerivedArgList *DAL = MachO::TranslateArgs(Args, BoundArch);
const OptTable &Opts = getDriver().getOpts();
// If no architecture is bound, none of the translations here are relevant.
if (!BoundArch)
return DAL;
// 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.
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 (isTargetIOSBased() && !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);
}
}
// Default to use libc++ on OS X 10.9+ and iOS 7+.
if (((isTargetMacOS() && !isMacosxVersionLT(10, 9)) ||
(isTargetIOSBased() && !isIPhoneOSVersionLT(7, 0))) &&
!Args.getLastArg(options::OPT_stdlib_EQ))
DAL->AddJoinedArg(nullptr, Opts.getOption(options::OPT_stdlib_EQ),
"libc++");
// 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 targeting iOS < 5.0 in any way.
if (isTargetIOSBased() && isIPhoneOSVersionLT(5, 0))
where = "iOS 5.0";
if (where != StringRef()) {
getDriver().Diag(clang::diag::err_drv_invalid_libcxx_deployment) << where;
}
}
return DAL;
}
bool MachO::IsUnwindTablesDefault() const {
return getArch() == llvm::Triple::x86_64;
}
bool MachO::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 MachO::isPICDefault() const { return true; }
bool MachO::isPIEDefault() const { return false; }
bool MachO::isPICDefaultForced() const {
return (getArch() == llvm::Triple::x86_64 ||
getArch() == llvm::Triple::aarch64);
}
bool MachO::SupportsProfiling() const {
// Profiling instrumentation is only supported on x86.
return getArch() == llvm::Triple::x86 || getArch() == llvm::Triple::x86_64;
}
void Darwin::addMinVersionArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
VersionTuple TargetVersion = getTargetVersion();
if (isTargetIOSSimulator())
CmdArgs.push_back("-ios_simulator_version_min");
else if (isTargetIOSBased())
CmdArgs.push_back("-iphoneos_version_min");
else {
assert(isTargetMacOS() && "unexpected target");
CmdArgs.push_back("-macosx_version_min");
}
CmdArgs.push_back(Args.MakeArgString(TargetVersion.getAsString()));
}
void Darwin::addStartObjectFileArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
// Derived from startfile spec.
if (Args.hasArg(options::OPT_dynamiclib)) {
// Derived from darwin_dylib1 spec.
if (isTargetIOSSimulator()) {
; // iOS simulator does not need dylib1.o.
} else if (isTargetIPhoneOS()) {
if (isIPhoneOSVersionLT(3, 1))
CmdArgs.push_back("-ldylib1.o");
} else {
if (isMacosxVersionLT(10, 5))
CmdArgs.push_back("-ldylib1.o");
else if (isMacosxVersionLT(10, 6))
CmdArgs.push_back("-ldylib1.10.5.o");
}
} else {
if (Args.hasArg(options::OPT_bundle)) {
if (!Args.hasArg(options::OPT_static)) {
// Derived from darwin_bundle1 spec.
if (isTargetIOSSimulator()) {
; // iOS simulator does not need bundle1.o.
} else if (isTargetIPhoneOS()) {
if (isIPhoneOSVersionLT(3, 1))
CmdArgs.push_back("-lbundle1.o");
} else {
if (isMacosxVersionLT(10, 6))
CmdArgs.push_back("-lbundle1.o");
}
}
} else {
if (Args.hasArg(options::OPT_pg) && SupportsProfiling()) {
if (Args.hasArg(options::OPT_static) ||
Args.hasArg(options::OPT_object) ||
Args.hasArg(options::OPT_preload)) {
CmdArgs.push_back("-lgcrt0.o");
} else {
CmdArgs.push_back("-lgcrt1.o");