TEST(MultilibTest, SetSelection2) {
MultilibSet MS2 = MultilibSet()
.Maybe(Multilib("el").flag("+EL"))
.Maybe(Multilib("sf").flag("+SF"));
for (unsigned I = 0; I < 4; ++I) {
bool IsEL = I & 0x1;
bool IsSF = I & 0x2;
Multilib::flags_list Flags;
if (IsEL)
Flags.push_back("+EL");
else
Flags.push_back("-EL");
if (IsSF)
Flags.push_back("+SF");
else
Flags.push_back("-SF");
Multilib Selection;
ASSERT_TRUE(MS2.select(Flags, Selection)) << "Selection failed for "
<< (IsEL ? "+EL" : "-EL") << " "
<< (IsSF ? "+SF" : "-SF");
std::string Suffix;
if (IsEL)
Suffix += "/el";
if (IsSF)
Suffix += "/sf";
ASSERT_EQ(Selection.gccSuffix(), Suffix) << "Selection picked " << Selection
<< " which was not expected ";
}
}
MultilibSet &MultilibSet::Maybe(const Multilib &M) {
Multilib Opposite;
// Negate any '+' flags
for (StringRef Flag : M.flags()) {
if (Flag.front() == '+')
Opposite.flags().push_back(("-" + Flag.substr(1)).str());
}
return Either(M, Opposite);
}
TEST(MultilibTest, Construction3) {
Multilib M = Multilib().flag("+f1").flag("+f2").flag("-f3");
for (Multilib::flags_list::const_iterator I = M.flags().begin(),
E = M.flags().end();
I != E; ++I) {
ASSERT_TRUE(llvm::StringSwitch<bool>(*I)
.Cases("+f1", "+f2", "-f3", true)
.Default(false));
}
}
static bool hasFlag(const Multilib &M, StringRef Flag) {
for (Multilib::flags_list::const_iterator I = M.flags().begin(),
E = M.flags().end();
I != E; ++I) {
if (*I == Flag)
return true;
else if (StringRef(*I).substr(1) == Flag.substr(1))
return false;
}
return false;
}
bool MultilibSet::select(const Multilib::flags_list &Flags, Multilib &M) const {
llvm::StringMap<bool> FlagSet;
// Stuff all of the flags into the FlagSet such that a true mappend indicates
// the flag was enabled, and a false mappend indicates the flag was disabled.
for (StringRef Flag : Flags)
FlagSet[Flag.substr(1)] = isFlagEnabled(Flag);
multilib_list Filtered = filterCopy([&FlagSet](const Multilib &M) {
for (StringRef Flag : M.flags()) {
llvm::StringMap<bool>::const_iterator SI = FlagSet.find(Flag.substr(1));
if (SI != FlagSet.end())
if (SI->getValue() != isFlagEnabled(Flag))
return true;
}
return false;
}, Multilibs);
if (Filtered.size() == 0) {
return false;
} else if (Filtered.size() == 1) {
M = Filtered[0];
return true;
}
// TODO: pick the "best" multlib when more than one is suitable
assert(false);
return false;
}
static Multilib compose(const Multilib &Base, const Multilib &New) {
SmallString<128> GCCSuffix;
llvm::sys::path::append(GCCSuffix, "/", Base.gccSuffix(), New.gccSuffix());
SmallString<128> OSSuffix;
llvm::sys::path::append(OSSuffix, "/", Base.osSuffix(), New.osSuffix());
SmallString<128> IncludeSuffix;
llvm::sys::path::append(IncludeSuffix, "/", Base.includeSuffix(),
New.includeSuffix());
Multilib Composed(GCCSuffix, OSSuffix, IncludeSuffix);
Multilib::flags_list &Flags = Composed.flags();
Flags.insert(Flags.end(), Base.flags().begin(), Base.flags().end());
Flags.insert(Flags.end(), New.flags().begin(), New.flags().end());
return Composed;
}
bool operator()(const Multilib &M) const override {
for (StringRef Flag : M.flags()) {
llvm::StringMap<bool>::const_iterator SI = FlagSet.find(Flag.substr(1));
if (SI != FlagSet.end())
if (SI->getValue() != isFlagEnabled(Flag))
return true;
}
return false;
}
bool operator()(const Multilib &M) const override {
std::string Error;
if (!R.isValid(Error)) {
llvm::errs() << Error;
assert(false);
return false;
}
return R.match(M.gccSuffix());
}
MultilibSet &MultilibSet::Either(ArrayRef<Multilib> MultilibSegments) {
multilib_list Composed;
if (Multilibs.empty())
Multilibs.insert(Multilibs.end(), MultilibSegments.begin(),
MultilibSegments.end());
else {
for (const Multilib &New : MultilibSegments) {
for (const Multilib &Base : *this) {
Multilib MO = compose(Base, New);
if (MO.isValid())
Composed.push_back(MO);
}
}
Multilibs = Composed;
}
return *this;
}
bool Multilib::operator==(const Multilib &Other) const {
// Check whether the flags sets match
// allowing for the match to be order invariant
llvm::StringSet<> MyFlags;
for (const auto &Flag : Flags)
MyFlags.insert(Flag);
for (const auto &Flag : Other.Flags)
if (MyFlags.find(Flag) == MyFlags.end())
return false;
if (osSuffix() != Other.osSuffix())
return false;
if (gccSuffix() != Other.gccSuffix())
return false;
if (includeSuffix() != Other.includeSuffix())
return false;
return true;
}
Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
: Generic_ELF(D, Triple, Args) {
GCCInstallation.init(Triple, Args);
Multilibs = GCCInstallation.getMultilibs();
llvm::Triple::ArchType Arch = Triple.getArch();
std::string SysRoot = computeSysRoot();
// Cross-compiling binutils and GCC installations (vanilla and openSUSE at
// least) put various tools in a triple-prefixed directory off of the parent
// of the GCC installation. We use the GCC triple here to ensure that we end
// up with tools that support the same amount of cross compiling as the
// detected GCC installation. For example, if we find a GCC installation
// targeting x86_64, but it is a bi-arch GCC installation, it can also be
// used to target i386.
// FIXME: This seems unlikely to be Linux-specific.
ToolChain::path_list &PPaths = getProgramPaths();
PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
GCCInstallation.getTriple().str() + "/bin")
.str());
Distro Distro(D.getVFS());
if (Distro.IsOpenSUSE() || Distro.IsUbuntu()) {
ExtraOpts.push_back("-z");
ExtraOpts.push_back("relro");
}
if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
ExtraOpts.push_back("-X");
const bool IsAndroid = Triple.isAndroid();
const bool IsMips = tools::isMipsArch(Arch);
const bool IsHexagon = Arch == llvm::Triple::hexagon;
if (IsMips && !SysRoot.empty())
ExtraOpts.push_back("--sysroot=" + SysRoot);
// Do not use 'gnu' hash style for Mips targets because .gnu.hash
// and the MIPS ABI require .dynsym to be sorted in different ways.
// .gnu.hash needs symbols to be grouped by hash code whereas the MIPS
// ABI requires a mapping between the GOT and the symbol table.
// Android loader does not support .gnu.hash.
// Hexagon linker/loader does not support .gnu.hash
if (!IsMips && !IsAndroid && !IsHexagon) {
if (Distro.IsRedhat() || Distro.IsOpenSUSE() ||
(Distro.IsUbuntu() && Distro >= Distro::UbuntuMaverick))
ExtraOpts.push_back("--hash-style=gnu");
if (Distro.IsDebian() || Distro.IsOpenSUSE() || Distro == Distro::UbuntuLucid ||
Distro == Distro::UbuntuJaunty || Distro == Distro::UbuntuKarmic)
ExtraOpts.push_back("--hash-style=both");
}
if (Distro.IsRedhat() && Distro != Distro::RHEL5 && Distro != Distro::RHEL6)
ExtraOpts.push_back("--no-add-needed");
#ifdef ENABLE_LINKER_BUILD_ID
ExtraOpts.push_back("--build-id");
#endif
if (Distro.IsOpenSUSE())
ExtraOpts.push_back("--enable-new-dtags");
// The selection of paths to try here is designed to match the patterns which
// the GCC driver itself uses, as this is part of the GCC-compatible driver.
// This was determined by running GCC in a fake filesystem, creating all
// possible permutations of these directories, and seeing which ones it added
// to the link paths.
path_list &Paths = getFilePaths();
const std::string OSLibDir = getOSLibDir(Triple, Args);
const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
// Add the multilib suffixed paths where they are available.
if (GCCInstallation.isValid()) {
const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
const std::string &LibPath = GCCInstallation.getParentLibPath();
const Multilib &Multilib = GCCInstallation.getMultilib();
const MultilibSet &Multilibs = GCCInstallation.getMultilibs();
// Add toolchain / multilib specific file paths.
addMultilibsFilePaths(D, Multilibs, Multilib,
GCCInstallation.getInstallPath(), Paths);
// Sourcery CodeBench MIPS toolchain holds some libraries under
// a biarch-like suffix of the GCC installation.
addPathIfExists(D, GCCInstallation.getInstallPath() + Multilib.gccSuffix(),
Paths);
// GCC cross compiling toolchains will install target libraries which ship
// as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
// any part of the GCC installation in
// <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
// debatable, but is the reality today. We need to search this tree even
// when we have a sysroot somewhere else. It is the responsibility of
// whomever is doing the cross build targeting a sysroot using a GCC
// installation that is *not* within the system root to ensure two things:
//
// 1) Any DSOs that are linked in from this tree or from the install path
// above must be present on the system root and found via an
// appropriate rpath.
// 2) There must not be libraries installed into
// <prefix>/<triple>/<libdir> unless they should be preferred over
// those within the system root.
//
// Note that this matches the GCC behavior. See the below comment for where
// Clang diverges from GCC's behavior.
addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" +
OSLibDir + Multilib.osSuffix(),
Paths);
// If the GCC installation we found is inside of the sysroot, we want to
// prefer libraries installed in the parent prefix of the GCC installation.
// It is important to *not* use these paths when the GCC installation is
// outside of the system root as that can pick up unintended libraries.
// This usually happens when there is an external cross compiler on the
// host system, and a more minimal sysroot available that is the target of
// the cross. Note that GCC does include some of these directories in some
// configurations but this seems somewhere between questionable and simply
// a bug.
if (StringRef(LibPath).startswith(SysRoot)) {
addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths);
addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths);
}
}
// Similar to the logic for GCC above, if we currently running Clang inside
// of the requested system root, add its parent library paths to
// those searched.
// FIXME: It's not clear whether we should use the driver's installed
// directory ('Dir' below) or the ResourceDir.
if (StringRef(D.Dir).startswith(SysRoot)) {
addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths);
addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths);
}
addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths);
addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths);
// Try walking via the GCC triple path in case of biarch or multiarch GCC
// installations with strange symlinks.
if (GCCInstallation.isValid()) {
addPathIfExists(D,
SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() +
"/../../" + OSLibDir,
Paths);
// Add the 'other' biarch variant path
Multilib BiarchSibling;
if (GCCInstallation.getBiarchSibling(BiarchSibling)) {
addPathIfExists(D, GCCInstallation.getInstallPath() +
BiarchSibling.gccSuffix(),
Paths);
}
// See comments above on the multilib variant for details of why this is
// included even from outside the sysroot.
const std::string &LibPath = GCCInstallation.getParentLibPath();
const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
const Multilib &Multilib = GCCInstallation.getMultilib();
addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" +
Multilib.osSuffix(),
Paths);
// See comments above on the multilib variant for details of why this is
// only included from within the sysroot.
if (StringRef(LibPath).startswith(SysRoot))
addPathIfExists(D, LibPath, Paths);
}
// Similar to the logic for GCC above, if we are currently running Clang
// inside of the requested system root, add its parent library path to those
// searched.
// FIXME: It's not clear whether we should use the driver's installed
// directory ('Dir' below) or the ResourceDir.
if (StringRef(D.Dir).startswith(SysRoot))
addPathIfExists(D, D.Dir + "/../lib", Paths);
addPathIfExists(D, SysRoot + "/lib", Paths);
addPathIfExists(D, SysRoot + "/usr/lib", Paths);
}
bool operator()(const Multilib &M) const override {
return StringRef(M.gccSuffix()).startswith("/p");
}
