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