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llvm-project/clang/lib/Driver/ToolChains.cpp
Chandler Carruth 621fed5f5a Fuse the two halves of the GCC installation detection. This is 
significantly cleaner (IMO) and more principled. We now walk down each
layer of the directory hierarchy searching for the GCC install. This
change does in fact introduce a significant behavior change in theory,
although in practice I don't know of any distro that will be impacted by
it negatively, and Debian may (untested) get slightly better through it.

Specifically, the logic now looks exhaustively for patterns such as:

  /usr/lib/<triple>/gcc/<triple>

Previously, this would only be selected if there was *also*
a '/usr/lib/gcc/<triple>' directory, or if '<triple>' were the excat
DefaultHostTriple in the driver.

There is a 4-deep nested loop here, but it doesn't do terribly many
filesystem operations, as we skip at each layer of that layer's
directory doesn't exist.

There remains a significant FIXME in this logic: it would be much better
to first build up a set of candidate components for each of the four
layers with a bottom-up pruning such as this, but then select the final
installation using a top-down algorithm in order to find the newest GCC
installation available, regardless of which particular path leads to it.

llvm-svn: 141071
2011-10-04 08:32:14 +00:00

1931 lines
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//===--- 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"
#ifdef HAVE_CLANG_CONFIG_H
# include "clang/Config/config.h"
#endif
#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/HostInfo.h"
#include "clang/Driver/ObjCRuntime.h"
#include "clang/Driver/OptTable.h"
#include "clang/Driver/Option.h"
#include "clang/Driver/Options.h"
#include "clang/Basic/Version.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/system_error.h"
#include <cstdlib> // ::getenv
#include "llvm/Config/config.h" // for CXX_INCLUDE_ROOT
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang;
/// Darwin - Darwin tool chain for i386 and x86_64.
Darwin::Darwin(const HostInfo &Host, const llvm::Triple& Triple)
: ToolChain(Host, Triple), TargetInitialized(false),
ARCRuntimeForSimulator(ARCSimulator_None)
{
// Compute the initial Darwin version based on the host.
bool HadExtra;
std::string OSName = Triple.getOSName();
if (!Driver::GetReleaseVersion(&OSName.c_str()[6],
DarwinVersion[0], DarwinVersion[1],
DarwinVersion[2], HadExtra))
getDriver().Diag(diag::err_drv_invalid_darwin_version) << OSName;
llvm::raw_string_ostream(MacosxVersionMin)
<< "10." << std::max(0, (int)DarwinVersion[0] - 4) << '.'
<< DarwinVersion[1];
}
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;
}
bool Darwin::hasARCRuntime() const {
// FIXME: Remove this once there is a proper way to detect an ARC runtime
// for the simulator.
switch (ARCRuntimeForSimulator) {
case ARCSimulator_None:
break;
case ARCSimulator_HasARCRuntime:
return true;
case ARCSimulator_NoARCRuntime:
return false;
}
if (isTargetIPhoneOS())
return !isIPhoneOSVersionLT(5);
else
return !isMacosxVersionLT(10, 7);
}
/// Darwin provides an ARC runtime starting in MacOS X 10.7 and iOS 5.0.
void Darwin::configureObjCRuntime(ObjCRuntime &runtime) const {
if (runtime.getKind() != ObjCRuntime::NeXT)
return ToolChain::configureObjCRuntime(runtime);
runtime.HasARC = runtime.HasWeak = hasARCRuntime();
// So far, objc_terminate is only available in iOS 5.
// FIXME: do the simulator logic properly.
if (!ARCRuntimeForSimulator && isTargetIPhoneOS())
runtime.HasTerminate = !isIPhoneOSVersionLT(5);
else
runtime.HasTerminate = false;
}
/// 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);
}
// FIXME: Can we tablegen this?
static const char *GetArmArchForMArch(StringRef Value) {
if (Value == "armv6k")
return "armv6";
if (Value == "armv5tej")
return "armv5";
if (Value == "xscale")
return "xscale";
if (Value == "armv4t")
return "armv4t";
if (Value == "armv7" || Value == "armv7-a" || Value == "armv7-r" ||
Value == "armv7-m" || Value == "armv7a" || Value == "armv7r" ||
Value == "armv7m")
return "armv7";
return 0;
}
// FIXME: Can we tablegen this?
static const char *GetArmArchForMCpu(StringRef Value) {
if (Value == "arm10tdmi" || Value == "arm1020t" || Value == "arm9e" ||
Value == "arm946e-s" || Value == "arm966e-s" ||
Value == "arm968e-s" || Value == "arm10e" ||
Value == "arm1020e" || Value == "arm1022e" || Value == "arm926ej-s" ||
Value == "arm1026ej-s")
return "armv5";
if (Value == "xscale")
return "xscale";
if (Value == "arm1136j-s" || Value == "arm1136jf-s" ||
Value == "arm1176jz-s" || Value == "arm1176jzf-s" ||
Value == "cortex-m0" )
return "armv6";
if (Value == "cortex-a8" || Value == "cortex-r4" || Value == "cortex-m3")
return "armv7";
return 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(Args)))
return Arch;
if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
if (const char *Arch = GetArmArchForMCpu(A->getValue(Args)))
return Arch;
return "arm";
}
}
}
Darwin::~Darwin() {
// Free tool implementations.
for (llvm::DenseMap<unsigned, Tool*>::iterator
it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
delete it->second;
}
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();
unsigned Version[3];
getTargetVersion(Version);
llvm::SmallString<16> Str;
llvm::raw_svector_ostream(Str)
<< (isTargetIPhoneOS() ? "ios" : "macosx")
<< Version[0] << "." << Version[1] << "." << Version[2];
Triple.setOSName(Str.str());
return Triple.getTriple();
}
Tool &Darwin::SelectTool(const Compilation &C, const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple())) {
// Fallback to llvm-gcc for i386 kext compiles, we don't support that ABI.
if (Inputs.size() == 1 &&
types::isCXX(Inputs[0]->getType()) &&
getTriple().getOS() == llvm::Triple::Darwin &&
getTriple().getArch() == llvm::Triple::x86 &&
(C.getArgs().getLastArg(options::OPT_fapple_kext) ||
C.getArgs().getLastArg(options::OPT_mkernel)))
Key = JA.getKind();
else
Key = Action::AnalyzeJobClass;
} else
Key = JA.getKind();
// FIXME: This doesn't belong here, but ideally we will support static soon
// anyway.
bool HasStatic = (C.getArgs().hasArg(options::OPT_mkernel) ||
C.getArgs().hasArg(options::OPT_static) ||
C.getArgs().hasArg(options::OPT_fapple_kext));
bool IsIADefault = IsIntegratedAssemblerDefault() && !HasStatic;
bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
options::OPT_no_integrated_as,
IsIADefault);
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::InputClass:
case Action::BindArchClass:
llvm_unreachable("Invalid tool kind.");
case Action::PreprocessJobClass:
T = new tools::darwin::Preprocess(*this); break;
case Action::AnalyzeJobClass:
T = new tools::Clang(*this); break;
case Action::PrecompileJobClass:
case Action::CompileJobClass:
T = new tools::darwin::Compile(*this); break;
case Action::AssembleJobClass: {
if (UseIntegratedAs)
T = new tools::ClangAs(*this);
else
T = new tools::darwin::Assemble(*this);
break;
}
case Action::LinkJobClass:
T = new tools::darwin::Link(*this); break;
case Action::LipoJobClass:
T = new tools::darwin::Lipo(*this); break;
case Action::DsymutilJobClass:
T = new tools::darwin::Dsymutil(*this); break;
case Action::VerifyJobClass:
T = new tools::darwin::VerifyDebug(*this); break;
}
}
return *T;
}
DarwinClang::DarwinClang(const HostInfo &Host, const llvm::Triple& Triple)
: Darwin(Host, Triple)
{
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);
// For fallback, we need to know how to find the GCC cc1 executables, so we
// also add the GCC libexec paths. This is legacy code that can be removed
// once fallback is no longer useful.
AddGCCLibexecPath(DarwinVersion[0]);
AddGCCLibexecPath(DarwinVersion[0] - 2);
AddGCCLibexecPath(DarwinVersion[0] - 1);
AddGCCLibexecPath(DarwinVersion[0] + 1);
AddGCCLibexecPath(DarwinVersion[0] + 2);
}
void DarwinClang::AddGCCLibexecPath(unsigned darwinVersion) {
std::string ToolChainDir = "i686-apple-darwin";
ToolChainDir += llvm::utostr(darwinVersion);
ToolChainDir += "/4.2.1";
std::string Path = getDriver().Dir;
Path += "/../llvm-gcc-4.2/libexec/gcc/";
Path += ToolChainDir;
getProgramPaths().push_back(Path);
Path = "/usr/llvm-gcc-4.2/libexec/gcc/";
Path += ToolChainDir;
getProgramPaths().push_back(Path);
}
void DarwinClang::AddLinkSearchPathArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
// The Clang toolchain uses explicit paths for internal libraries.
// Unfortunately, we still might depend on a few of the libraries that are
// only available in the gcc library directory (in particular
// libstdc++.dylib). For now, hardcode the path to the known install location.
llvm::sys::Path P(getDriver().Dir);
P.eraseComponent(); // .../usr/bin -> ../usr
P.appendComponent("lib");
P.appendComponent("gcc");
switch (getTriple().getArch()) {
default:
llvm_unreachable("Invalid Darwin arch!");
case llvm::Triple::x86:
case llvm::Triple::x86_64:
P.appendComponent("i686-apple-darwin10");
break;
case llvm::Triple::arm:
case llvm::Triple::thumb:
P.appendComponent("arm-apple-darwin10");
break;
case llvm::Triple::ppc:
case llvm::Triple::ppc64:
P.appendComponent("powerpc-apple-darwin10");
break;
}
P.appendComponent("4.2.1");
// Determine the arch specific GCC subdirectory.
const char *ArchSpecificDir = 0;
switch (getTriple().getArch()) {
default:
break;
case llvm::Triple::arm:
case llvm::Triple::thumb: {
std::string Triple = ComputeLLVMTriple(Args);
StringRef TripleStr = Triple;
if (TripleStr.startswith("armv5") || TripleStr.startswith("thumbv5"))
ArchSpecificDir = "v5";
else if (TripleStr.startswith("armv6") || TripleStr.startswith("thumbv6"))
ArchSpecificDir = "v6";
else if (TripleStr.startswith("armv7") || TripleStr.startswith("thumbv7"))
ArchSpecificDir = "v7";
break;
}
case llvm::Triple::ppc64:
ArchSpecificDir = "ppc64";
break;
case llvm::Triple::x86_64:
ArchSpecificDir = "x86_64";
break;
}
if (ArchSpecificDir) {
P.appendComponent(ArchSpecificDir);
bool Exists;
if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)
CmdArgs.push_back(Args.MakeArgString("-L" + P.str()));
P.eraseComponent();
}
bool Exists;
if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)
CmdArgs.push_back(Args.MakeArgString("-L" + P.str()));
}
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 (isTargetIPhoneOS())
s += "iphoneos";
// FIXME: isTargetIphoneOSSimulator() is not returning true.
else if (ARCRuntimeForSimulator != ARCSimulator_None)
s += "iphonesimulator";
else
s += "macosx";
s += ".a";
CmdArgs.push_back(Args.MakeArgString(s));
}
void DarwinClang::AddLinkRuntimeLib(const ArgList &Args,
ArgStringList &CmdArgs,
const char *DarwinStaticLib) 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.
bool Exists;
if (!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 doesn't support real static executables, don't link any runtime
// libraries with -static.
if (Args.hasArg(options::OPT_static))
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;
}
// 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.
if (!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");
}
}
}
static inline StringRef SimulatorVersionDefineName() {
return "__IPHONE_OS_VERSION_MIN_REQUIRED";
}
/// \brief Parse the simulator version define:
/// __IPHONE_OS_VERSION_MIN_REQUIRED=([0-9])([0-9][0-9])([0-9][0-9])
// and return the grouped values as integers, e.g:
// __IPHONE_OS_VERSION_MIN_REQUIRED=40201
// will return Major=4, Minor=2, Micro=1.
static bool GetVersionFromSimulatorDefine(StringRef define,
unsigned &Major, unsigned &Minor,
unsigned &Micro) {
assert(define.startswith(SimulatorVersionDefineName()));
StringRef name, version;
llvm::tie(name, version) = define.split('=');
if (version.empty())
return false;
std::string verstr = version.str();
char *end;
unsigned num = (unsigned) strtol(verstr.c_str(), &end, 10);
if (*end != '\0')
return false;
Major = num / 10000;
num = num % 10000;
Minor = num / 100;
Micro = num % 100;
return true;
}
void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
const OptTable &Opts = getDriver().getOpts();
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);
// FIXME: HACK! When compiling for the simulator we don't get a
// '-miphoneos-version-min' to help us know whether there is an ARC runtime
// or not; try to parse a __IPHONE_OS_VERSION_MIN_REQUIRED
// define passed in command-line.
if (!iOSVersion) {
for (arg_iterator it = Args.filtered_begin(options::OPT_D),
ie = Args.filtered_end(); it != ie; ++it) {
StringRef define = (*it)->getValue(Args);
if (define.startswith(SimulatorVersionDefineName())) {
unsigned Major = 0, Minor = 0, Micro = 0;
if (GetVersionFromSimulatorDefine(define, Major, Minor, Micro) &&
Major < 10 && Minor < 100 && Micro < 100) {
ARCRuntimeForSimulator = Major < 5 ? ARCSimulator_NoARCRuntime
: ARCSimulator_HasARCRuntime;
}
break;
}
}
}
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(Args);
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())
if (getDarwinArchName(Args) == "armv7")
iOSTarget = "0.0";
// 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(Args), 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(Args), 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(Args));
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.
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");
P.appendComponent("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.
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.
//
// FIXME: Canonicalize name.
StringRef XarchArch = A->getValue(Args, 0);
if (!(XarchArch == getArchName() ||
(BoundArch && XarchArch == BoundArch)))
continue;
Arg *OriginalArg = A;
unsigned Index = Args.getBaseArgs().MakeIndex(A->getValue(Args, 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().isDriverOption()) {
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().isLinkerInput()) {
// 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(Args, 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(Args));
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 == "armv7")
DAL->AddJoinedArg(0, MArch, "armv7a");
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.
AddDeploymentTarget(*DAL);
return DAL;
}
bool Darwin::IsUnwindTablesDefault() const {
// FIXME: Gross; we should probably have some separate target
// definition, possibly even reusing the one in clang.
return getArchName() == "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);
}
const char *Darwin::GetDefaultRelocationModel() const {
return "pic";
}
const char *Darwin::GetForcedPicModel() const {
if (getArchName() == "x86_64")
return "pic";
return 0;
}
bool Darwin::SupportsProfiling() const {
// Profiling instrumentation is only supported on x86.
return getArchName() == "i386" || getArchName() == "x86_64";
}
bool Darwin::SupportsObjCGC() const {
// Garbage collection is supported everywhere except on iPhone OS.
return !isTargetIPhoneOS();
}
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.
Generic_GCC::Generic_GCC(const HostInfo &Host, const llvm::Triple& Triple)
: ToolChain(Host, Triple) {
getProgramPaths().push_back(getDriver().getInstalledDir());
if (getDriver().getInstalledDir() != getDriver().Dir)
getProgramPaths().push_back(getDriver().Dir);
}
Generic_GCC::~Generic_GCC() {
// Free tool implementations.
for (llvm::DenseMap<unsigned, Tool*>::iterator
it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
delete it->second;
}
Tool &Generic_GCC::SelectTool(const Compilation &C,
const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
Key = Action::AnalyzeJobClass;
else
Key = JA.getKind();
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::InputClass:
case Action::BindArchClass:
llvm_unreachable("Invalid tool kind.");
case Action::PreprocessJobClass:
T = new tools::gcc::Preprocess(*this); break;
case Action::PrecompileJobClass:
T = new tools::gcc::Precompile(*this); break;
case Action::AnalyzeJobClass:
T = new tools::Clang(*this); break;
case Action::CompileJobClass:
T = new tools::gcc::Compile(*this); break;
case Action::AssembleJobClass:
T = new tools::gcc::Assemble(*this); break;
case Action::LinkJobClass:
T = new tools::gcc::Link(*this); break;
// This is a bit ungeneric, but the only platform using a driver
// driver is Darwin.
case Action::LipoJobClass:
T = new tools::darwin::Lipo(*this); break;
case Action::DsymutilJobClass:
T = new tools::darwin::Dsymutil(*this); break;
case Action::VerifyJobClass:
T = new tools::darwin::VerifyDebug(*this); break;
}
}
return *T;
}
bool Generic_GCC::IsUnwindTablesDefault() const {
// FIXME: Gross; we should probably have some separate target
// definition, possibly even reusing the one in clang.
return getArchName() == "x86_64";
}
const char *Generic_GCC::GetDefaultRelocationModel() const {
return "static";
}
const char *Generic_GCC::GetForcedPicModel() const {
return 0;
}
/// 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 HostInfo &Host, const llvm::Triple& Triple)
: ToolChain(Host, Triple) {
// Path mangling to find libexec
std::string Path(getDriver().Dir);
Path += "/../libexec";
getProgramPaths().push_back(Path);
}
TCEToolChain::~TCEToolChain() {
for (llvm::DenseMap<unsigned, Tool*>::iterator
it = Tools.begin(), ie = Tools.end(); it != ie; ++it)
delete it->second;
}
bool TCEToolChain::IsMathErrnoDefault() const {
return true;
}
bool TCEToolChain::IsUnwindTablesDefault() const {
return false;
}
const char *TCEToolChain::GetDefaultRelocationModel() const {
return "static";
}
const char *TCEToolChain::GetForcedPicModel() const {
return 0;
}
Tool &TCEToolChain::SelectTool(const Compilation &C,
const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
Key = Action::AnalyzeJobClass;
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::PreprocessJobClass:
T = new tools::gcc::Preprocess(*this); break;
case Action::AnalyzeJobClass:
T = new tools::Clang(*this); break;
default:
llvm_unreachable("Unsupported action for TCE target.");
}
}
return *T;
}
/// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly.
OpenBSD::OpenBSD(const HostInfo &Host, const llvm::Triple& Triple)
: Generic_ELF(Host, Triple) {
getFilePaths().push_back(getDriver().Dir + "/../lib");
getFilePaths().push_back("/usr/lib");
}
Tool &OpenBSD::SelectTool(const Compilation &C, const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
Key = Action::AnalyzeJobClass;
else
Key = JA.getKind();
bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
options::OPT_no_integrated_as,
IsIntegratedAssemblerDefault());
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::AssembleJobClass: {
if (UseIntegratedAs)
T = new tools::ClangAs(*this);
else
T = new tools::openbsd::Assemble(*this);
break;
}
case Action::LinkJobClass:
T = new tools::openbsd::Link(*this); break;
default:
T = &Generic_GCC::SelectTool(C, JA, Inputs);
}
}
return *T;
}
/// FreeBSD - FreeBSD tool chain which can call as(1) and ld(1) directly.
FreeBSD::FreeBSD(const HostInfo &Host, const llvm::Triple& Triple)
: Generic_ELF(Host, Triple) {
// Determine if we are compiling 32-bit code on an x86_64 platform.
bool Lib32 = false;
if (Triple.getArch() == llvm::Triple::x86 &&
llvm::Triple(getDriver().DefaultHostTriple).getArch() ==
llvm::Triple::x86_64)
Lib32 = true;
if (Triple.getArch() == llvm::Triple::ppc &&
llvm::Triple(getDriver().DefaultHostTriple).getArch() ==
llvm::Triple::ppc64)
Lib32 = true;
if (Lib32) {
getFilePaths().push_back("/usr/lib32");
} else {
getFilePaths().push_back("/usr/lib");
}
}
Tool &FreeBSD::SelectTool(const Compilation &C, const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
Key = Action::AnalyzeJobClass;
else
Key = JA.getKind();
bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
options::OPT_no_integrated_as,
IsIntegratedAssemblerDefault());
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::AssembleJobClass:
if (UseIntegratedAs)
T = new tools::ClangAs(*this);
else
T = new tools::freebsd::Assemble(*this);
break;
case Action::LinkJobClass:
T = new tools::freebsd::Link(*this); break;
default:
T = &Generic_GCC::SelectTool(C, JA, Inputs);
}
}
return *T;
}
/// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
NetBSD::NetBSD(const HostInfo &Host, const llvm::Triple& Triple,
const llvm::Triple& ToolTriple)
: Generic_ELF(Host, Triple), ToolTriple(ToolTriple) {
// Determine if we are compiling 32-bit code on an x86_64 platform.
bool Lib32 = false;
if (ToolTriple.getArch() == llvm::Triple::x86_64 &&
Triple.getArch() == llvm::Triple::x86)
Lib32 = true;
if (getDriver().UseStdLib) {
if (Lib32)
getFilePaths().push_back("=/usr/lib/i386");
else
getFilePaths().push_back("=/usr/lib");
}
}
Tool &NetBSD::SelectTool(const Compilation &C, const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
Key = Action::AnalyzeJobClass;
else
Key = JA.getKind();
bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
options::OPT_no_integrated_as,
IsIntegratedAssemblerDefault());
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::AssembleJobClass:
if (UseIntegratedAs)
T = new tools::ClangAs(*this);
else
T = new tools::netbsd::Assemble(*this, ToolTriple);
break;
case Action::LinkJobClass:
T = new tools::netbsd::Link(*this, ToolTriple);
break;
default:
T = &Generic_GCC::SelectTool(C, JA, Inputs);
}
}
return *T;
}
/// Minix - Minix tool chain which can call as(1) and ld(1) directly.
Minix::Minix(const HostInfo &Host, const llvm::Triple& Triple)
: Generic_GCC(Host, Triple) {
getFilePaths().push_back(getDriver().Dir + "/../lib");
getFilePaths().push_back("/usr/lib");
getFilePaths().push_back("/usr/gnu/lib");
getFilePaths().push_back("/usr/gnu/lib/gcc/i686-pc-minix/4.4.3");
}
Tool &Minix::SelectTool(const Compilation &C, const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
Key = Action::AnalyzeJobClass;
else
Key = JA.getKind();
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::AssembleJobClass:
T = new tools::minix::Assemble(*this); break;
case Action::LinkJobClass:
T = new tools::minix::Link(*this); break;
default:
T = &Generic_GCC::SelectTool(C, JA, Inputs);
}
}
return *T;
}
/// AuroraUX - AuroraUX tool chain which can call as(1) and ld(1) directly.
AuroraUX::AuroraUX(const HostInfo &Host, const llvm::Triple& Triple)
: Generic_GCC(Host, Triple) {
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::SelectTool(const Compilation &C, const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
Key = Action::AnalyzeJobClass;
else
Key = JA.getKind();
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::AssembleJobClass:
T = new tools::auroraux::Assemble(*this); break;
case Action::LinkJobClass:
T = new tools::auroraux::Link(*this); break;
default:
T = &Generic_GCC::SelectTool(C, JA, Inputs);
}
}
return *T;
}
/// Linux toolchain (very bare-bones at the moment).
enum LinuxDistro {
ArchLinux,
DebianLenny,
DebianSqueeze,
DebianWheezy,
Exherbo,
RHEL4,
RHEL5,
RHEL6,
Fedora13,
Fedora14,
Fedora15,
FedoraRawhide,
OpenSuse11_3,
OpenSuse11_4,
OpenSuse12_1,
UbuntuHardy,
UbuntuIntrepid,
UbuntuJaunty,
UbuntuKarmic,
UbuntuLucid,
UbuntuMaverick,
UbuntuNatty,
UbuntuOneiric,
UnknownDistro
};
static bool IsRedhat(enum LinuxDistro Distro) {
return Distro == Fedora13 || Distro == Fedora14 ||
Distro == Fedora15 || Distro == FedoraRawhide ||
Distro == RHEL4 || Distro == RHEL5 || Distro == RHEL6;
}
static bool IsOpenSuse(enum LinuxDistro Distro) {
return Distro == OpenSuse11_3 || Distro == OpenSuse11_4 ||
Distro == OpenSuse12_1;
}
static bool IsDebian(enum LinuxDistro Distro) {
return Distro == DebianLenny || Distro == DebianSqueeze ||
Distro == DebianWheezy;
}
static bool IsUbuntu(enum LinuxDistro Distro) {
return Distro == UbuntuHardy || Distro == UbuntuIntrepid ||
Distro == UbuntuLucid || Distro == UbuntuMaverick ||
Distro == UbuntuJaunty || Distro == UbuntuKarmic ||
Distro == UbuntuNatty || Distro == UbuntuOneiric;
}
// FIXME: This should be deleted. We should assume a multilib environment, and
// fallback gracefully if any parts of it are absent.
static bool HasMultilib(llvm::Triple::ArchType Arch, enum LinuxDistro Distro) {
if (Arch == llvm::Triple::x86_64) {
bool Exists;
if (Distro == Exherbo &&
(llvm::sys::fs::exists("/usr/lib32/libc.so", Exists) || !Exists))
return false;
}
return true;
}
static LinuxDistro DetectLinuxDistro(llvm::Triple::ArchType Arch) {
llvm::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");
for (unsigned int i = 0, s = Lines.size(); i < s; ++ i) {
if (Lines[i] == "DISTRIB_CODENAME=hardy")
return UbuntuHardy;
else if (Lines[i] == "DISTRIB_CODENAME=intrepid")
return UbuntuIntrepid;
else if (Lines[i] == "DISTRIB_CODENAME=jaunty")
return UbuntuJaunty;
else if (Lines[i] == "DISTRIB_CODENAME=karmic")
return UbuntuKarmic;
else if (Lines[i] == "DISTRIB_CODENAME=lucid")
return UbuntuLucid;
else if (Lines[i] == "DISTRIB_CODENAME=maverick")
return UbuntuMaverick;
else if (Lines[i] == "DISTRIB_CODENAME=natty")
return UbuntuNatty;
else if (Lines[i] == "DISTRIB_CODENAME=oneiric")
return UbuntuOneiric;
}
return UnknownDistro;
}
if (!llvm::MemoryBuffer::getFile("/etc/redhat-release", File)) {
StringRef Data = File.get()->getBuffer();
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"))
return DebianSqueeze;
else if (Data.startswith("wheezy/sid"))
return DebianWheezy;
return UnknownDistro;
}
if (!llvm::MemoryBuffer::getFile("/etc/SuSE-release", File)) {
StringRef Data = File.get()->getBuffer();
if (Data.startswith("openSUSE 11.3"))
return OpenSuse11_3;
else if (Data.startswith("openSUSE 11.4"))
return OpenSuse11_4;
else if (Data.startswith("openSUSE 12.1"))
return OpenSuse12_1;
return 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 Trivial helper function to simplify code checking path existence.
static bool PathExists(StringRef Path) {
bool Exists;
if (!llvm::sys::fs::exists(Path, Exists))
return Exists;
return false;
}
namespace {
/// \brief This is a class to find a viable GCC installation for Clang to use.
///
/// This class tries to find a GCC installation on the system, and report
/// information about it. It starts from the host information provided to the
/// Driver, and has logic for fuzzing that where appropriate.
class GCCInstallationDetector {
bool IsValid;
std::string GccTriple;
// FIXME: These might be better as path objects.
std::string GccInstallPath;
std::string GccParentLibPath;
llvm::SmallString<128> CxxIncludeRoot;
public:
/// \brief Construct a GCCInstallationDetector from the driver.
///
/// This performs all of the autodetection and sets up the various paths.
/// Once constructed, a GCCInstallation is esentially immutable.
GCCInstallationDetector(const Driver &D)
: IsValid(false),
GccTriple(D.DefaultHostTriple),
CxxIncludeRoot(CXX_INCLUDE_ROOT) {
// FIXME: Using CXX_INCLUDE_ROOT is here is a bit of a hack, but
// avoids adding yet another option to configure/cmake.
// It would probably be cleaner to break it in two variables
// CXX_GCC_ROOT with just /foo/bar
// CXX_GCC_VER with 4.5.2
// Then we would have
// CXX_INCLUDE_ROOT = CXX_GCC_ROOT/include/c++/CXX_GCC_VER
// and this function would return
// CXX_GCC_ROOT/lib/gcc/CXX_INCLUDE_ARCH/CXX_GCC_VER
if (CxxIncludeRoot != "") {
// This is of the form /foo/bar/include/c++/4.5.2/
if (CxxIncludeRoot.back() == '/')
llvm::sys::path::remove_filename(CxxIncludeRoot); // remove the /
StringRef Version = llvm::sys::path::filename(CxxIncludeRoot);
llvm::sys::path::remove_filename(CxxIncludeRoot); // remove the version
llvm::sys::path::remove_filename(CxxIncludeRoot); // remove the c++
llvm::sys::path::remove_filename(CxxIncludeRoot); // remove the include
GccInstallPath = CxxIncludeRoot.str();
GccInstallPath.append("/lib/gcc/");
GccInstallPath.append(CXX_INCLUDE_ARCH);
GccInstallPath.append("/");
GccInstallPath.append(Version);
GccParentLibPath = GccInstallPath + "/../../../..";
IsValid = true;
return;
}
llvm::Triple::ArchType HostArch = llvm::Triple(GccTriple).getArch();
// The library directories which may contain GCC installations.
SmallVector<StringRef, 2> CandidateLibDirs;
// The compatible GCC triples for this particular architecture.
SmallVector<StringRef, 10> CandidateTriples;
if (HostArch == llvm::Triple::arm || HostArch == llvm::Triple::thumb) {
static const char *const LibDirs[] = { "/lib/gcc" };
static const char *const Triples[] = { "arm-linux-gnueabi" };
CandidateLibDirs.append(LibDirs, LibDirs + llvm::array_lengthof(LibDirs));
CandidateTriples.append(Triples, Triples + llvm::array_lengthof(Triples));
} else if (HostArch == llvm::Triple::x86_64) {
static const char *const LibDirs[] = {
"/lib64/gcc", "/lib/gcc", "/lib64", "/lib"
};
static const char *const Triples[] = {
"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"
};
CandidateLibDirs.append(LibDirs, LibDirs + llvm::array_lengthof(LibDirs));
CandidateTriples.append(Triples, Triples + llvm::array_lengthof(Triples));
} else if (HostArch == llvm::Triple::x86) {
static const char *const LibDirs[] = {
"/lib32/gcc", "/lib/gcc", "/lib32", "/lib"
};
static const char *const Triples[] = {
"i686-linux-gnu",
"i386-linux-gnu",
"i686-pc-linux-gnu",
"i486-linux-gnu",
"i686-redhat-linux",
"i586-suse-linux",
"i486-slackware-linux"
};
CandidateLibDirs.append(LibDirs, LibDirs + llvm::array_lengthof(LibDirs));
CandidateTriples.append(Triples, Triples + llvm::array_lengthof(Triples));
} else if (HostArch == llvm::Triple::ppc) {
static const char *const LibDirs[] = {
"/lib32/gcc", "/lib/gcc", "/lib32", "/lib"
};
static const char *const Triples[] = {
"powerpc-linux-gnu",
"powerpc-unknown-linux-gnu"
};
CandidateLibDirs.append(LibDirs, LibDirs + llvm::array_lengthof(LibDirs));
CandidateTriples.append(Triples, Triples + llvm::array_lengthof(Triples));
} else if (HostArch == llvm::Triple::ppc64) {
static const char *const LibDirs[] = {
"/lib64/gcc", "/lib/gcc", "/lib64", "/lib"
};
static const char *const Triples[] = { "powerpc64-unknown-linux-gnu" };
CandidateLibDirs.append(LibDirs, LibDirs + llvm::array_lengthof(LibDirs));
CandidateTriples.append(Triples, Triples + llvm::array_lengthof(Triples));
}
// Always include the default host triple as the final fallback if no
// specific triple is detected.
CandidateTriples.push_back(D.DefaultHostTriple);
static const char* GccVersions[] = {
"4.6.1", "4.6.0", "4.6",
"4.5.3", "4.5.2", "4.5.1", "4.5",
"4.4.6", "4.4.5", "4.4.4", "4.4.3", "4.4",
"4.3.4", "4.3.3", "4.3.2", "4.3",
"4.2.4", "4.2.3", "4.2.2", "4.2.1", "4.2",
"4.1.1"};
// Set this as valid so we can early exit from the loops if we find
// a viable installation.
IsValid = true;
SmallVector<std::string, 8> Prefixes(D.PrefixDirs.begin(),
D.PrefixDirs.end());
Prefixes.push_back(D.SysRoot + "/usr");
// FIXME: This entire nested loop structure is broken. The structure is
// well suited to quickly pruning impossible (non-existent) sub-trees, but
// doesn't find all viable GCC installations and choose the best one. We
// should invert this, and prune the impossible subtrees bottom-up, but
// then select the best GCC installation top-down so that we prefer the
// newest GCC, the most accurate triple, and only at the end select the lib
// and prefix directories containing that installation.
for (SmallVectorImpl<std::string>::const_iterator PI = Prefixes.begin(),
PE = Prefixes.end();
PI != PE; ++PI) {
if (!PathExists(*PI))
continue;
// First finds the 'prefix' which exists beneath the system root. Second,
// finds the first triple which exists beneath that prefix.
StringRef DetectedGccPrefix, DetectedGccTriple;
for (unsigned i = 0, ie = CandidateLibDirs.size(); i < ie; ++i) {
const std::string LibDir = *PI + CandidateLibDirs[i].str();
if (!PathExists(LibDir))
continue;
for (unsigned j = 0, je = CandidateTriples.size(); j < je; ++j) {
GccTriple = CandidateTriples[j];
const std::string TripleDir = LibDir + "/" + GccTriple;
if (!PathExists(TripleDir))
continue;
for (unsigned k = 0; k < llvm::array_lengthof(GccVersions); ++k) {
GccInstallPath = TripleDir + "/" + GccVersions[k];
GccParentLibPath = GccInstallPath + "/../../..";
if (PathExists(GccInstallPath + "/crtbegin.o"))
return;
// Try an install directory with an extra triple in it.
GccInstallPath =
TripleDir + "/gcc/" + GccTriple + "/" + GccVersions[k];
GccParentLibPath = GccInstallPath + "/../../../..";
if (PathExists(GccInstallPath + "/crtbegin.o"))
return;
if (GccTriple != "i386-linux-gnu")
continue;
// Ubuntu 11.04 uses an unusual path.
GccInstallPath =
TripleDir + "/gcc/i686-linux-gnu/" + GccVersions[k];
GccParentLibPath = GccInstallPath + "/../../../..";
if (PathExists(GccInstallPath + "/crtbegin.o"))
return;
}
}
}
}
GccTriple.clear();
GccInstallPath.clear();
GccParentLibPath.clear();
IsValid = false;
}
/// \brief Check whether we detected a valid GCC install.
bool isValid() const { return IsValid; }
/// \brief Get the GCC triple for the detected install.
const std::string &getTriple() const { return GccTriple; }
/// \brief Get the detected GCC installation path.
const std::string &getInstallPath() const { return GccInstallPath; }
/// \brief Get the detected GCC parent lib path.
const std::string &getParentLibPath() const { return GccParentLibPath; }
};
}
static void addPathIfExists(const std::string &Path,
ToolChain::path_list &Paths) {
if (PathExists(Path)) Paths.push_back(Path);
}
Linux::Linux(const HostInfo &Host, const llvm::Triple &Triple)
: Generic_ELF(Host, Triple) {
llvm::Triple::ArchType Arch =
llvm::Triple(getDriver().DefaultHostTriple).getArch();
const std::string &SysRoot = getDriver().SysRoot;
GCCInstallationDetector GCCInstallation(getDriver());
// OpenSuse stores the linker with the compiler, add that to the search
// path.
ToolChain::path_list &PPaths = getProgramPaths();
PPaths.push_back(GCCInstallation.getParentLibPath() + "/../" +
GCCInstallation.getTriple() + "/bin");
Linker = GetProgramPath("ld");
LinuxDistro Distro = DetectLinuxDistro(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");
if (IsRedhat(Distro) || IsOpenSuse(Distro) || Distro == UbuntuMaverick ||
Distro == UbuntuNatty || Distro == UbuntuOneiric)
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 ||
IsOpenSuse(Distro) ||
(IsRedhat(Distro) && Distro != RHEL4 && Distro != RHEL5) ||
Distro == UbuntuLucid ||
Distro == UbuntuMaverick || Distro == UbuntuKarmic ||
Distro == UbuntuNatty || Distro == UbuntuOneiric)
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 bool Is32Bits = (getArch() == llvm::Triple::x86 ||
getArch() == llvm::Triple::ppc);
const std::string Suffix32 = Arch == llvm::Triple::x86_64 ? "/32" : "";
const std::string Suffix64 = Arch == llvm::Triple::x86_64 ? "" : "/64";
const std::string Suffix = Is32Bits ? Suffix32 : Suffix64;
const std::string Multilib = Is32Bits ? "lib32" : "lib64";
// FIXME: Because we add paths only when they exist on the system, I think we
// should remove the concept of 'HasMultilib'. It's more likely to break the
// behavior than to preserve any useful invariant on the system.
if (HasMultilib(Arch, Distro)) {
// Add the multilib suffixed paths.
if (GCCInstallation.isValid()) {
const std::string &LibPath = GCCInstallation.getParentLibPath();
const std::string &GccTriple = GCCInstallation.getTriple();
// FIXME: This OpenSuse-specific path shouldn't be needed any more, but
// I don't want to remove it without finding someone to test.
if (IsOpenSuse(Distro) && Is32Bits)
Paths.push_back(LibPath + "/../" + GccTriple + "/lib/../lib");
addPathIfExists(GCCInstallation.getInstallPath() + Suffix, Paths);
addPathIfExists(LibPath + "/../" + GccTriple + "/lib/../" + Multilib,
Paths);
addPathIfExists(LibPath + "/../" + Multilib, Paths);
}
addPathIfExists(SysRoot + "/lib/../" + Multilib, Paths);
addPathIfExists(SysRoot + "/usr/lib/../" + Multilib, Paths);
}
// Add the non-multiplib suffixed paths (if potentially different).
if (GCCInstallation.isValid()) {
const std::string &LibPath = GCCInstallation.getParentLibPath();
const std::string &GccTriple = GCCInstallation.getTriple();
if (!Suffix.empty() || !HasMultilib(Arch, Distro))
addPathIfExists(GCCInstallation.getInstallPath(), Paths);
addPathIfExists(LibPath + "/../" + GccTriple + "/lib", Paths);
addPathIfExists(LibPath, Paths);
}
addPathIfExists(SysRoot + "/lib", Paths);
addPathIfExists(SysRoot + "/usr/lib", Paths);
if (GCCInstallation.isValid() && Arch == getArch() && IsUbuntu(Distro))
Paths.push_back(SysRoot + "/usr/lib/" + GCCInstallation.getTriple());
}
bool Linux::HasNativeLLVMSupport() const {
return true;
}
Tool &Linux::SelectTool(const Compilation &C, const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
Key = Action::AnalyzeJobClass;
else
Key = JA.getKind();
bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
options::OPT_no_integrated_as,
IsIntegratedAssemblerDefault());
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::AssembleJobClass:
if (UseIntegratedAs)
T = new tools::ClangAs(*this);
else
T = new tools::linuxtools::Assemble(*this);
break;
case Action::LinkJobClass:
T = new tools::linuxtools::Link(*this); break;
default:
T = &Generic_GCC::SelectTool(C, JA, Inputs);
}
}
return *T;
}
/// DragonFly - DragonFly tool chain which can call as(1) and ld(1) directly.
DragonFly::DragonFly(const HostInfo &Host, const llvm::Triple& Triple)
: Generic_ELF(Host, Triple) {
// 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::SelectTool(const Compilation &C, const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
Key = Action::AnalyzeJobClass;
else
Key = JA.getKind();
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::AssembleJobClass:
T = new tools::dragonfly::Assemble(*this); break;
case Action::LinkJobClass:
T = new tools::dragonfly::Link(*this); break;
default:
T = &Generic_GCC::SelectTool(C, JA, Inputs);
}
}
return *T;
}
Windows::Windows(const HostInfo &Host, const llvm::Triple& Triple)
: ToolChain(Host, Triple) {
}
Tool &Windows::SelectTool(const Compilation &C, const JobAction &JA,
const ActionList &Inputs) const {
Action::ActionClass Key;
if (getDriver().ShouldUseClangCompiler(C, JA, getTriple()))
Key = Action::AnalyzeJobClass;
else
Key = JA.getKind();
bool UseIntegratedAs = C.getArgs().hasFlag(options::OPT_integrated_as,
options::OPT_no_integrated_as,
IsIntegratedAssemblerDefault());
Tool *&T = Tools[Key];
if (!T) {
switch (Key) {
case Action::InputClass:
case Action::BindArchClass:
case Action::LipoJobClass:
case Action::DsymutilJobClass:
case Action::VerifyJobClass:
llvm_unreachable("Invalid tool kind.");
case Action::PreprocessJobClass:
case Action::PrecompileJobClass:
case Action::AnalyzeJobClass:
case Action::CompileJobClass:
T = new tools::Clang(*this); break;
case Action::AssembleJobClass:
if (!UseIntegratedAs && getTriple().getEnvironment() == llvm::Triple::MachO)
T = new tools::darwin::Assemble(*this);
else
T = new tools::ClangAs(*this);
break;
case Action::LinkJobClass:
T = new tools::visualstudio::Link(*this); break;
}
}
return *T;
}
bool Windows::IsIntegratedAssemblerDefault() const {
return true;
}
bool Windows::IsUnwindTablesDefault() const {
// FIXME: Gross; we should probably have some separate target
// definition, possibly even reusing the one in clang.
return getArchName() == "x86_64";
}
const char *Windows::GetDefaultRelocationModel() const {
return "static";
}
const char *Windows::GetForcedPicModel() const {
if (getArchName() == "x86_64")
return "pic";
return 0;
}
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