forked from OSchip/llvm-project
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
//===- llvm/Support/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 <cctype>
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#include <string>
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#include <cstdlib> // ::getenv
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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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#ifdef __APPLE__
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// Recognize UNAME_RELEASE environment variable to match Darwin's uname,
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// where the value of this variable sets the OS release version
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// reported by "uname -r".
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const char *UnameOverride = ::getenv("UNAME_RELEASE");
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if (UnameOverride && UnameOverride[0] != '\0')
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return UnameOverride;
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#endif // __APPLE__
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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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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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Triple += getOSVersion();
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}
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return Triple;
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}
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