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//===- llvm/Support/Unix/Host.inc -------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the UNIX Host support.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only generic UNIX code that
//=== is guaranteed to work on *all* UNIX variants.
//===----------------------------------------------------------------------===//
#include "llvm/Config/config.h"
#include "llvm/ADT/StringRef.h"
#include "Unix.h"
#include <sys/utsname.h>
#include <cctype>
#include <string>
#include <cstdlib> // ::getenv
using namespace llvm;
static std::string getOSVersion() {
struct utsname info;
if (uname(&info))
return "";
return info.release;
}
std::string sys::getHostTriple() {
// FIXME: Derive directly instead of relying on the autoconf generated
// variable.
StringRef HostTripleString(LLVM_HOSTTRIPLE);
std::pair<StringRef, StringRef> ArchSplit = HostTripleString.split('-');
// Normalize the arch, since the host triple may not actually match the host.
std::string Arch = ArchSplit.first;
std::string Triple(Arch);
Triple += '-';
Triple += ArchSplit.second;
// Force i<N>86 to i386.
if (Triple[0] == 'i' && isdigit(Triple[1]) &&
Triple[2] == '8' && Triple[3] == '6')
Triple[1] = '3';
// On darwin, we want to update the version to match that of the
// host.
std::string::size_type DarwinDashIdx = Triple.find("-darwin");
if (DarwinDashIdx != std::string::npos) {
Triple.resize(DarwinDashIdx + strlen("-darwin"));
Triple += getOSVersion();
}
return Triple;
}
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