sthibaul updated this revision to Diff 173601. Repository: rC Clang
https://reviews.llvm.org/D54379 Files: lib/Basic/Targets.cpp lib/Basic/Targets/OSTargets.h lib/Driver/CMakeLists.txt lib/Driver/Driver.cpp lib/Driver/ToolChains/Clang.cpp lib/Driver/ToolChains/Gnu.cpp lib/Driver/ToolChains/Hurd.cpp lib/Driver/ToolChains/Hurd.h lib/Frontend/InitHeaderSearch.cpp
Index: lib/Frontend/InitHeaderSearch.cpp =================================================================== --- lib/Frontend/InitHeaderSearch.cpp +++ lib/Frontend/InitHeaderSearch.cpp @@ -260,6 +260,7 @@ switch (os) { case llvm::Triple::Linux: + case llvm::Triple::Hurd: case llvm::Triple::Solaris: llvm_unreachable("Include management is handled in the driver."); Index: lib/Driver/ToolChains/Hurd.h =================================================================== --- lib/Driver/ToolChains/Hurd.h +++ lib/Driver/ToolChains/Hurd.h @@ -0,0 +1,36 @@ +//===--- Hurd.h - Hurd ToolChain Implementations ----------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_Hurd_H +#define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_Hurd_H + +#include "Gnu.h" +#include "clang/Driver/ToolChain.h" + +namespace clang { +namespace driver { +namespace toolchains { + +class LLVM_LIBRARY_VISIBILITY Hurd : public Generic_ELF { +public: + Hurd(const Driver &D, const llvm::Triple &Triple, + const llvm::opt::ArgList &Args); + + void + AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, + llvm::opt::ArgStringList &CC1Args) const override; + + virtual std::string computeSysRoot() const; +}; + +} // end namespace toolchains +} // end namespace driver +} // end namespace clang + +#endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_Hurd_H Index: lib/Driver/ToolChains/Hurd.cpp =================================================================== --- lib/Driver/ToolChains/Hurd.cpp +++ lib/Driver/ToolChains/Hurd.cpp @@ -0,0 +1,142 @@ +//===--- Hurd.cpp - Hurd 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 "Hurd.h" +#include "CommonArgs.h" +#include "clang/Basic/VirtualFileSystem.h" +#include "clang/Config/config.h" +#include "clang/Driver/Driver.h" +#include "clang/Driver/Options.h" +#include "llvm/Support/Path.h" + +using namespace clang::driver; +using namespace clang::driver::toolchains; +using namespace clang; +using namespace llvm::opt; + +using tools::addPathIfExists; + +/// Get our best guess at the multiarch triple for a target. +/// +/// Debian-based systems are starting to use a multiarch setup where they use +/// a target-triple directory in the library and header search paths. +/// Unfortunately, this triple does not align with the vanilla target triple, +/// so we provide a rough mapping here. +static std::string getMultiarchTriple(const Driver &D, + const llvm::Triple &TargetTriple, + StringRef SysRoot) { + // For most architectures, just use whatever we have rather than trying to be + // clever. + switch (TargetTriple.getArch()) { + default: + break; + + // We use the existence of '/lib/<triple>' as a directory to detect some + // common hurd triples that don't quite match the Clang triple for both + // 32-bit and 64-bit targets. Multiarch fixes its install triples to these + // regardless of what the actual target triple is. + case llvm::Triple::x86: + if (D.getVFS().exists(SysRoot + "/lib/i386-gnu")) + return "i386-gnu"; + break; + } + + return TargetTriple.str(); +} + +static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args) { + // It happens that only x86 and PPC use the 'lib32' variant of oslibdir, and + // using that variant while targeting other architectures causes problems + // because the libraries are laid out in shared system roots that can't cope + // with a 'lib32' library search path being considered. So we only enable + // them when we know we may need it. + // + // FIXME: This is a bit of a hack. We should really unify this code for + // reasoning about oslibdir spellings with the lib dir spellings in the + // GCCInstallationDetector, but that is a more significant refactoring. + + if (Triple.getArch() == llvm::Triple::x86) + return "lib32"; + + return Triple.isArch32Bit() ? "lib" : "lib64"; +} + +Hurd::Hurd(const Driver &D, const llvm::Triple &Triple, + const ArgList &Args) + : Generic_ELF(D, Triple, Args) { } + +std::string Hurd::computeSysRoot() const { + if (!getDriver().SysRoot.empty()) + return getDriver().SysRoot; + + return std::string(); +} + +void Hurd::AddClangSystemIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + const Driver &D = getDriver(); + std::string SysRoot = computeSysRoot(); + + if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc)) + return; + + if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) + addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include"); + + if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { + SmallString<128> P(D.ResourceDir); + llvm::sys::path::append(P, "include"); + addSystemInclude(DriverArgs, CC1Args, P); + } + + if (DriverArgs.hasArg(options::OPT_nostdlibinc)) + return; + + // Check for configure-time C include directories. + StringRef CIncludeDirs(C_INCLUDE_DIRS); + if (CIncludeDirs != "") { + SmallVector<StringRef, 5> Dirs; + CIncludeDirs.split(Dirs, ":"); + for (StringRef Dir : Dirs) { + StringRef Prefix = + llvm::sys::path::is_absolute(Dir) ? StringRef(SysRoot) : ""; + addExternCSystemInclude(DriverArgs, CC1Args, Prefix + Dir); + } + return; + } + + // Lacking those, try to detect the correct set of system includes for the + // target triple. + + const StringRef X86MultiarchIncludeDirs[] = { + "/usr/include/i386-gnu"}; + + ArrayRef<StringRef> MultiarchIncludeDirs; + switch (getTriple().getArch()) { + default: + break; + case llvm::Triple::x86: + MultiarchIncludeDirs = X86MultiarchIncludeDirs; + break; + } + + for (StringRef Dir : MultiarchIncludeDirs) { + if (D.getVFS().exists(SysRoot + Dir)) { + addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + Dir); + break; + } + } + + // Add an include of '/include' directly. This isn't provided by default by + // system GCCs, but is often used with cross-compiling GCCs, and harmless to + // add even when Clang is acting as-if it were a system compiler. + addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include"); + + addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include"); +} Index: lib/Driver/ToolChains/Gnu.cpp =================================================================== --- lib/Driver/ToolChains/Gnu.cpp +++ lib/Driver/ToolChains/Gnu.cpp @@ -2260,6 +2260,9 @@ // triple. {"i386-linux-gnu/gcc/" + CandidateTriple.str(), "../../..", (TargetArch == llvm::Triple::x86 && + TargetTriple.getOS() != llvm::Triple::Solaris)}, + {"i386-gnu/gcc/" + CandidateTriple.str(), "../../..", + (TargetArch == llvm::Triple::x86 && TargetTriple.getOS() != llvm::Triple::Solaris)}}; for (auto &Suffix : Suffixes) { Index: lib/Driver/ToolChains/Clang.cpp =================================================================== --- lib/Driver/ToolChains/Clang.cpp +++ lib/Driver/ToolChains/Clang.cpp @@ -530,7 +530,8 @@ return !areOptimizationsEnabled(Args); } - if (Triple.isOSLinux() || Triple.getOS() == llvm::Triple::CloudABI) { + if (Triple.isOSLinux() || Triple.getOS() == llvm::Triple::CloudABI || + Triple.isOSHurd()) { switch (Triple.getArch()) { // Don't use a frame pointer on linux if optimizing for certain targets. case llvm::Triple::mips64: Index: lib/Driver/Driver.cpp =================================================================== --- lib/Driver/Driver.cpp +++ lib/Driver/Driver.cpp @@ -26,6 +26,7 @@ #include "ToolChains/HIP.h" #include "ToolChains/Haiku.h" #include "ToolChains/Hexagon.h" +#include "ToolChains/Hurd.h" #include "ToolChains/Lanai.h" #include "ToolChains/Linux.h" #include "ToolChains/MSVC.h" @@ -388,6 +389,17 @@ return DAL; } +static void replaceString(std::string &S, + const char *Other, + const char *Replace) { + size_t pos = S.find(Other); + + if (pos == std::string::npos) + return; + + S.replace(pos, strlen(Other), Replace); +} + /// Compute target triple from args. /// /// This routine provides the logic to compute a target triple from various @@ -400,6 +412,11 @@ if (const Arg *A = Args.getLastArg(options::OPT_target)) TargetTriple = A->getValue(); + std::string T = TargetTriple; + replaceString(T, "-unknown-gnu", "-unknown-hurd-gnu"); + replaceString(T, "-pc-gnu", "-pc-hurd-gnu"); + TargetTriple = T; + llvm::Triple Target(llvm::Triple::normalize(TargetTriple)); // Handle Apple-specific options available here. @@ -4570,6 +4587,9 @@ case llvm::Triple::Contiki: TC = llvm::make_unique<toolchains::Contiki>(*this, Target, Args); break; + case llvm::Triple::Hurd: + TC = llvm::make_unique<toolchains::Hurd>(*this, Target, Args); + break; default: // Of these targets, Hexagon is the only one that might have // an OS of Linux, in which case it got handled above already. Index: lib/Driver/CMakeLists.txt =================================================================== --- lib/Driver/CMakeLists.txt +++ lib/Driver/CMakeLists.txt @@ -47,6 +47,7 @@ ToolChains/Haiku.cpp ToolChains/HIP.cpp ToolChains/Hexagon.cpp + ToolChains/Hurd.cpp ToolChains/Linux.cpp ToolChains/MipsLinux.cpp ToolChains/MinGW.cpp Index: lib/Basic/Targets.cpp =================================================================== --- lib/Basic/Targets.cpp +++ lib/Basic/Targets.cpp @@ -495,6 +495,8 @@ return new NaClTargetInfo<X86_32TargetInfo>(Triple, Opts); case llvm::Triple::ELFIAMCU: return new MCUX86_32TargetInfo(Triple, Opts); + case llvm::Triple::Hurd: + return new HurdTargetInfo<X86_32TargetInfo>(Triple, Opts); default: return new X86_32TargetInfo(Triple, Opts); } Index: lib/Basic/Targets/OSTargets.h =================================================================== --- lib/Basic/Targets/OSTargets.h +++ lib/Basic/Targets/OSTargets.h @@ -270,6 +270,27 @@ } }; +// Hurd target +template <typename Target> +class LLVM_LIBRARY_VISIBILITY HurdTargetInfo : public OSTargetInfo<Target> { +protected: + void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple, + MacroBuilder &Builder) const override { + // Linux defines; list based off of gcc output + DefineStd(Builder, "unix", Opts); + Builder.defineMacro("__GNU__"); + Builder.defineMacro("__GLIBC__"); + Builder.defineMacro("__ELF__"); + if (Opts.POSIXThreads) + Builder.defineMacro("_REENTRANT"); + if (Opts.CPlusPlus) + Builder.defineMacro("_GNU_SOURCE"); + } +public: + HurdTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts) + : OSTargetInfo<Target>(Triple, Opts) {} +}; + // Minix Target template <typename Target> class LLVM_LIBRARY_VISIBILITY MinixTargetInfo : public OSTargetInfo<Target> {
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