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//===- llvm/TargetParser/Unix/Host.inc --------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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/ADT/StringRef.h"
#include "llvm/Config/config.h"
#include <cctype>
#include <string>
#include <sys/utsname.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
using namespace llvm;
static std::string getOSVersion() {
struct utsname info;
if (uname(&info))
return "";
return info.release;
}
static std::string updateTripleOSVersion(std::string TargetTripleString) {
// On darwin, we want to update the version to match that of the target.
std::string::size_type DarwinDashIdx = TargetTripleString.find("-darwin");
if (DarwinDashIdx != std::string::npos) {
TargetTripleString.resize(DarwinDashIdx + strlen("-darwin"));
TargetTripleString += getOSVersion();
return TargetTripleString;
}
std::string::size_type MacOSDashIdx = TargetTripleString.find("-macos");
if (MacOSDashIdx != std::string::npos) {
TargetTripleString.resize(MacOSDashIdx);
// Reset the OS to darwin as the OS version from `uname` doesn't use the
// macOS version scheme.
TargetTripleString += "-darwin";
TargetTripleString += getOSVersion();
}
// On AIX, the AIX version and release should be that of the current host
// unless if the version has already been specified.
if (Triple(LLVM_HOST_TRIPLE).getOS() == Triple::AIX) {
Triple TT(TargetTripleString);
if (TT.getOS() == Triple::AIX && !TT.getOSMajorVersion()) {
struct utsname name;
if (uname(&name) != -1) {
std::string NewOSName = std::string(Triple::getOSTypeName(Triple::AIX));
NewOSName += name.version;
NewOSName += '.';
NewOSName += name.release;
NewOSName += ".0.0";
TT.setOSName(NewOSName);
return TT.str();
}
}
}
return TargetTripleString;
}
std::string sys::getDefaultTargetTriple() {
std::string TargetTripleString =
updateTripleOSVersion(LLVM_DEFAULT_TARGET_TRIPLE);
// Override the default target with an environment variable named by
// LLVM_TARGET_TRIPLE_ENV.
#if defined(LLVM_TARGET_TRIPLE_ENV)
if (const char *EnvTriple = std::getenv(LLVM_TARGET_TRIPLE_ENV))
TargetTripleString = EnvTriple;
#endif
return TargetTripleString;
}
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