forked from OSchip/llvm-project
97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
//===- llvm/System/Unix/Host.inc -------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the UNIX Host support.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic UNIX code that
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//=== is guaranteed to work on *all* UNIX variants.
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//===----------------------------------------------------------------------===//
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#include "llvm/Config/config.h"
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#include "llvm/ADT/StringRef.h"
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#include "Unix.h"
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#include <sys/utsname.h>
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#include <string>
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using namespace llvm;
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static std::string getOSVersion() {
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struct utsname info;
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if (uname(&info))
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return "";
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return info.release;
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}
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std::string sys::getHostTriple() {
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// FIXME: Derive directly instead of relying on the autoconf generated
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// variable.
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StringRef HostTripleString(LLVM_HOSTTRIPLE);
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std::pair<StringRef, StringRef> ArchSplit = HostTripleString.split('-');
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// Normalize the arch, since the host triple may not actually match the host.
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std::string Arch = ArchSplit.first;
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// It would be nice to do this in terms of llvm::Triple, but that is in
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// Support which is layered above us.
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#if defined(__x86_64__)
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Arch = "x86_64";
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#elif defined(__i386__)
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Arch = "i386";
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#elif defined(__ppc64__)
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Arch = "powerpc64";
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#elif defined(__ppc__)
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Arch = "powerpc";
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#elif defined(__arm__)
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// FIXME: We need to pick the right ARM triple (which involves querying the
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// chip). However, for now this is most important for LLVM arch selection, so
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// we only need to make sure to distinguish ARM and Thumb.
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# if defined(__thumb__)
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Arch = "thumb";
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# else
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Arch = "arm";
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# endif
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#else
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// FIXME: When enough auto-detection is in place, this should just
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// #error. Then at least the arch selection is done, and we only need the OS
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// etc selection to kill off the use of LLVM_HOSTTRIPLE.
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#endif
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std::string Triple(Arch);
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Triple += '-';
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Triple += ArchSplit.second;
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// Force i<N>86 to i386.
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if (Triple[0] == 'i' && isdigit(Triple[1]) &&
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Triple[2] == '8' && Triple[3] == '6')
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Triple[1] = '3';
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// On darwin, we want to update the version to match that of the
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// host.
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std::string::size_type DarwinDashIdx = Triple.find("-darwin");
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if (DarwinDashIdx != std::string::npos) {
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Triple.resize(DarwinDashIdx + strlen("-darwin"));
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// Only add the major part of the os version.
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std::string Version = getOSVersion();
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Triple += Version.substr(0, Version.find('.'));
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}
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return Triple;
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}
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