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//===- llvm/System/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 <string>
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;
// It would be nice to do this in terms of llvm::Triple, but that is in
// Support which is layered above us.
#if defined(__x86_64__)
Arch = "x86_64";
#elif defined(__i386__)
Arch = "i386";
#elif defined(__ppc64__)
Arch = "powerpc64";
#elif defined(__ppc__)
Arch = "powerpc";
#elif defined(__arm__)
// FIXME: We need to pick the right ARM triple (which involves querying the
// chip). However, for now this is most important for LLVM arch selection, so
// we only need to make sure to distinguish ARM and Thumb.
# if defined(__thumb__)
Arch = "thumb";
# else
Arch = "arm";
# endif
#else
// FIXME: When enough auto-detection is in place, this should just
// #error. Then at least the arch selection is done, and we only need the OS
// etc selection to kill off the use of LLVM_HOSTTRIPLE.
#endif
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"));
// Only add the major part of the os version.
std::string Version = getOSVersion();
Triple += Version.substr(0, Version.find('.'));
}
return Triple;
}
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