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//===-- PPCLinux.cpp - PowerPC ToolChain Implementations --------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "PPCLinux.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace llvm::opt;
using namespace llvm::sys;
// Glibc older than 2.32 doesn't fully support IEEE float128. Here we check
// glibc version by looking at dynamic linker name.
static bool GlibcSupportsFloat128(const std::string &Linker) {
llvm::SmallVector<char, 16> Path;
// Resolve potential symlinks to linker.
if (fs::real_path(Linker, Path))
return false;
llvm::StringRef LinkerName =
path::filename(llvm::StringRef(Path.data(), Path.size()));
// Since glibc 2.34, the installed .so file is not symlink anymore. But we can
// still safely assume it's newer than 2.32.
if (LinkerName.startswith("ld64.so"))
return true;
if (!LinkerName.startswith("ld-2."))
return false;
unsigned Minor = (LinkerName[5] - '0') * 10 + (LinkerName[6] - '0');
if (Minor < 32)
return false;
return true;
}
PPCLinuxToolChain::PPCLinuxToolChain(const Driver &D,
const llvm::Triple &Triple,
const llvm::opt::ArgList &Args)
: Linux(D, Triple, Args) {
if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) {
StringRef ABIName = A->getValue();
if ((ABIName == "ieeelongdouble" &&
!SupportIEEEFloat128(D, Triple, Args)) ||
(ABIName == "ibmlongdouble" && !supportIBMLongDouble(D, Args)))
D.Diag(diag::warn_drv_unsupported_float_abi_by_lib) << ABIName;
}
}
void PPCLinuxToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
if (!DriverArgs.hasArg(clang::driver::options::OPT_nostdinc) &&
!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
const Driver &D = getDriver();
SmallString<128> P(D.ResourceDir);
llvm::sys::path::append(P, "include", "ppc_wrappers");
addSystemInclude(DriverArgs, CC1Args, P);
}
Linux::AddClangSystemIncludeArgs(DriverArgs, CC1Args);
}
bool PPCLinuxToolChain::supportIBMLongDouble(
const Driver &D, const llvm::opt::ArgList &Args) const {
if (Args.hasArg(options::OPT_nostdlib, options::OPT_nostdlibxx))
return true;
CXXStdlibType StdLib = ToolChain::GetCXXStdlibType(Args);
if (StdLib == CST_Libstdcxx)
return true;
return StdLib == CST_Libcxx && !defaultToIEEELongDouble();
}
bool PPCLinuxToolChain::SupportIEEEFloat128(
const Driver &D, const llvm::Triple &Triple,
const llvm::opt::ArgList &Args) const {
if (!Triple.isLittleEndian() || !Triple.isPPC64())
return false;
if (Args.hasArg(options::OPT_nostdlib, options::OPT_nostdlibxx))
return true;
CXXStdlibType StdLib = ToolChain::GetCXXStdlibType(Args);
bool HasUnsupportedCXXLib =
(StdLib == CST_Libcxx && !defaultToIEEELongDouble()) ||
(StdLib == CST_Libstdcxx &&
GCCInstallation.getVersion().isOlderThan(12, 1, 0));
std::string Linker = Linux::getDynamicLinker(Args);
return GlibcSupportsFloat128((Twine(D.DyldPrefix) + Linker).str()) &&
!(D.CCCIsCXX() && HasUnsupportedCXXLib);
}
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