clang 19.0.0git
PPCLinux.cpp
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1//===-- PPCLinux.cpp - PowerPC ToolChain Implementations --------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "PPCLinux.h"
10#include "clang/Driver/Driver.h"
13#include "llvm/Support/FileSystem.h"
14#include "llvm/Support/Path.h"
15
16using namespace clang::driver;
17using namespace clang::driver::toolchains;
18using namespace llvm::opt;
19using namespace llvm::sys;
20
21// Glibc older than 2.32 doesn't fully support IEEE float128. Here we check
22// glibc version by looking at dynamic linker name.
23static bool GlibcSupportsFloat128(const std::string &Linker) {
25
26 // Resolve potential symlinks to linker.
27 if (fs::real_path(Linker, Path))
28 return false;
29 llvm::StringRef LinkerName =
30 path::filename(llvm::StringRef(Path.data(), Path.size()));
31
32 // Since glibc 2.34, the installed .so file is not symlink anymore. But we can
33 // still safely assume it's newer than 2.32.
34 if (LinkerName.starts_with("ld64.so"))
35 return true;
36
37 if (!LinkerName.starts_with("ld-2."))
38 return false;
39 unsigned Minor = (LinkerName[5] - '0') * 10 + (LinkerName[6] - '0');
40 if (Minor < 32)
41 return false;
42
43 return true;
44}
45
47 const llvm::Triple &Triple,
48 const llvm::opt::ArgList &Args)
49 : Linux(D, Triple, Args) {
50 if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) {
51 StringRef ABIName = A->getValue();
52
53 if ((ABIName == "ieeelongdouble" &&
54 !SupportIEEEFloat128(D, Triple, Args)) ||
55 (ABIName == "ibmlongdouble" && !supportIBMLongDouble(D, Args)))
56 D.Diag(diag::warn_drv_unsupported_float_abi_by_lib) << ABIName;
57 }
58}
59
60void PPCLinuxToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
61 ArgStringList &CC1Args) const {
62 if (!DriverArgs.hasArg(clang::driver::options::OPT_nostdinc) &&
63 !DriverArgs.hasArg(options::OPT_nobuiltininc)) {
64 const Driver &D = getDriver();
66 llvm::sys::path::append(P, "include", "ppc_wrappers");
67 addSystemInclude(DriverArgs, CC1Args, P);
68 }
69
70 Linux::AddClangSystemIncludeArgs(DriverArgs, CC1Args);
71}
72
73bool PPCLinuxToolChain::supportIBMLongDouble(
74 const Driver &D, const llvm::opt::ArgList &Args) const {
75 if (Args.hasArg(options::OPT_nostdlib, options::OPT_nostdlibxx))
76 return true;
77
79 if (StdLib == CST_Libstdcxx)
80 return true;
81
82 return StdLib == CST_Libcxx && !defaultToIEEELongDouble();
83}
84
85bool PPCLinuxToolChain::SupportIEEEFloat128(
86 const Driver &D, const llvm::Triple &Triple,
87 const llvm::opt::ArgList &Args) const {
88 if (!Triple.isLittleEndian() || !Triple.isPPC64())
89 return false;
90
91 if (Args.hasArg(options::OPT_nostdlib, options::OPT_nostdlibxx))
92 return true;
93
95 bool HasUnsupportedCXXLib =
96 (StdLib == CST_Libcxx && !defaultToIEEELongDouble()) ||
97 (StdLib == CST_Libstdcxx &&
99
100 std::string Linker = Linux::getDynamicLinker(Args);
101 return GlibcSupportsFloat128((Twine(D.DyldPrefix) + Linker).str()) &&
102 !(D.CCCIsCXX() && HasUnsupportedCXXLib);
103}
StringRef P
static bool GlibcSupportsFloat128(const std::string &Linker)
Definition: PPCLinux.cpp:23
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:77
std::string DyldPrefix
Dynamic loader prefix, if present.
Definition: Driver.h:186
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:144
std::string ResourceDir
The path to the compiler resource directory.
Definition: Driver.h:167
bool CCCIsCXX() const
Whether the driver should follow g++ like behavior.
Definition: Driver.h:216
static void addSystemInclude(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Utility function to add a system include directory to CC1 arguments.
Definition: ToolChain.cpp:1134
const Driver & getDriver() const
Definition: ToolChain.h:245
bool defaultToIEEELongDouble() const
Check whether use IEEE binary128 as long double format by default.
Definition: ToolChain.cpp:174
virtual CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const
Definition: ToolChain.cpp:1108
const GCCVersion & getVersion() const
Get the detected GCC version string.
Definition: Gnu.h:246
GCCInstallationDetector GCCInstallation
Definition: Gnu.h:288
void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add the clang cc1 arguments for system include paths.
Definition: Linux.cpp:615
std::string getDynamicLinker(const llvm::opt::ArgList &Args) const override
Definition: Linux.cpp:427
void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add the clang cc1 arguments for system include paths.
Definition: PPCLinux.cpp:60
PPCLinuxToolChain(const Driver &D, const llvm::Triple &Triple, const llvm::opt::ArgList &Args)
Definition: PPCLinux.cpp:46
bool isOlderThan(int RHSMajor, int RHSMinor, int RHSPatch, StringRef RHSPatchSuffix=StringRef()) const
Generic_GCC - A tool chain using the 'gcc' command to perform all subcommands; this relies on gcc tra...
Definition: Gnu.cpp:2078