1//===- llvm/Support/Unix/Host.inc -------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the UNIX Host support.
11//
12//===----------------------------------------------------------------------===//
13
14//===----------------------------------------------------------------------===//
15//=== WARNING: Implementation here must contain only generic UNIX code that
16//===          is guaranteed to work on *all* UNIX variants.
17//===----------------------------------------------------------------------===//
18
19#include "Unix.h"
20#include "llvm/ADT/StringRef.h"
21#include "llvm/Config/config.h"
22#include <cctype>
23#include <string>
24#include <sys/utsname.h>
25
26using namespace llvm;
27
28static std::string getOSVersion() {
29  struct utsname info;
30
31  if (uname(&info))
32    return "";
33
34  return info.release;
35}
36
37std::string sys::getDefaultTargetTriple() {
38  std::string TargetTripleString(LLVM_DEFAULT_TARGET_TRIPLE);
39
40  // On darwin, we want to update the version to match that of the
41  // target.
42  std::string::size_type DarwinDashIdx = TargetTripleString.find("-darwin");
43  if (DarwinDashIdx != std::string::npos) {
44    TargetTripleString.resize(DarwinDashIdx + strlen("-darwin"));
45    TargetTripleString += getOSVersion();
46  }
47
48  return Triple::normalize(TargetTripleString);
49}
50