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ParserOptions.cs
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ParserOptions.cs
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text.RegularExpressions;
namespace CppSharp.Parser
{
public enum LanguageVersion
{
/// <summary>
/// C programming language (year 1999).
/// </summary>
C99,
/// <summary>
/// C programming language (year 1999, GNU variant).
/// </summary>
C99_GNU,
/// <summary>
/// C++ programming language (year 1998).
/// </summary>
CPP98,
/// <summary>
/// C++ programming language (year 1998, GNU variant).
/// </summary>
CPP98_GNU,
/// <summary>
/// C++ programming language (year 2011).
/// </summary>
CPP11,
/// <summary>
/// C++ programming language (year 2011, GNU variant).
/// </summary>
CPP11_GNU,
/// <summary>
/// C++ programming language (year 2014).
/// </summary>
CPP14,
/// <summary>
/// C++ programming language (year 2014, GNU variant).
/// </summary>
CPP14_GNU,
/// <summary>
/// C++ programming language (year 2017).
/// </summary>
CPP17,
/// <summary>
/// C++ programming language (year 2017, GNU variant).
/// </summary>
CPP17_GNU,
/// <summary>
/// C++ programming language (year 2020).
/// </summary>
CPP20,
/// <summary>
/// C++ programming language (year 2020, GNU variant).
/// </summary>
CPP20_GNU,
/// <summary>
/// C++ programming language (year 2023).
/// </summary>
CPP23,
/// <summary>
/// C++ programming language (year 2023, GNU variant).
/// </summary>
CPP23_GNU,
}
public class ParserOptions : CppParserOptions
{
public ParserOptions()
{
MicrosoftMode = !Platform.IsUnixPlatform;
AddCompilationOptions("-flto");
AddCompilationOptions("-O3");
AddCompilationOptions("-fno-use-cxa-atexit");
}
public bool IsItaniumLikeAbi => !IsMicrosoftAbi;
public bool IsMicrosoftAbi => TargetTriple.Contains("win32") ||
TargetTriple.Contains("windows") || TargetTriple.Contains("msvc");
public bool EnableRTTI { get; set; }
public LanguageVersion? LanguageVersion { get; set; }
public void BuildForSourceFile(
IEnumerable<CppSharp.AST.Module> modules, string file = null)
{
// This eventually gets passed to Clang's MSCompatibilityVersion, which
// is in turn used to derive the value of the built-in define _MSC_VER.
// It used to receive a 4-digit based identifier but now expects a full
// version MSVC digit, so check if we still have the old version and
// convert to the right format.
if (ToolSetToUse.ToString(CultureInfo.InvariantCulture).Length == 4)
ToolSetToUse *= 100000;
foreach (var module in modules.Where(
m => file == null || m.Headers.Contains(file)))
{
foreach (var include in module.IncludeDirs)
AddIncludeDirs(include);
foreach (var define in module.Defines)
AddDefines(define);
foreach (var undefine in module.Undefines)
AddUndefines(undefine);
}
}
public void SetupMSVC()
{
var vsVersion = VisualStudioVersion.Latest;
// Silence "warning CS0162: Unreachable code detected"
#pragma warning disable 162
switch (BuildConfig.Choice)
{
case "vs2012":
vsVersion = VisualStudioVersion.VS2012;
break;
case "vs2013":
vsVersion = VisualStudioVersion.VS2013;
break;
case "vs2015":
vsVersion = VisualStudioVersion.VS2015;
break;
case "vs2017":
vsVersion = VisualStudioVersion.VS2017;
break;
case "vs2019":
vsVersion = VisualStudioVersion.VS2019;
break;
case "vs2022":
vsVersion = VisualStudioVersion.VS2022;
break;
#pragma warning restore 162
}
SetupMSVC(vsVersion);
}
/// <summary>
/// Sets up the parser options to work with the given Visual Studio toolchain.
/// </summary>
/// <param name="vsVersion">The version of Visual Studio to look for.</param>
public void SetupMSVC(VisualStudioVersion vsVersion)
{
MicrosoftMode = true;
var clVersion = MSVCToolchain.GetCLVersion(vsVersion);
ToolSetToUse = clVersion.Major * 10000000 + clVersion.Minor * 100000;
// do not remove the CppSharp prefix becase the Mono C# compiler breaks
if (!LanguageVersion.HasValue)
LanguageVersion = CppSharp.Parser.LanguageVersion.CPP14_GNU;
AddArguments("-fms-extensions");
AddArguments("-fms-compatibility");
AddArguments("-fdelayed-template-parsing");
}
/// <summary>
/// Set to true to opt for Xcode Clang builtin headers
/// </summary>
public bool UseXcodeBuiltins;
public void SetupXcode()
{
var cppIncPath = XcodeToolchain.GetXcodeCppIncludesFolder();
AddSystemIncludeDirs(cppIncPath);
var builtinsPath = XcodeToolchain.GetXcodeBuiltinIncludesFolder();
AddSystemIncludeDirs(UseXcodeBuiltins ? builtinsPath : BuiltinsDir);
var includePath = XcodeToolchain.GetXcodeIncludesFolder();
AddSystemIncludeDirs(includePath);
NoBuiltinIncludes = true;
NoStandardIncludes = true;
AddArguments("-fgnuc-version=4.2.1");
AddArguments("-stdlib=libc++");
}
private void GetUnixCompilerInfo(string headersPath, out string compiler,
out string longVersion, out string shortVersion)
{
if (!Platform.IsLinux)
{
compiler = "gcc";
// Search for the available GCC versions on the provided headers.
var versions = Directory.EnumerateDirectories(Path.Combine(headersPath,
"usr", "include", "c++"));
if (!versions.Any())
throw new Exception("No valid GCC version found on system include paths");
var gccVersionPath = versions.First();
longVersion = shortVersion = gccVersionPath.Substring(
gccVersionPath.LastIndexOf(Path.DirectorySeparatorChar) + 1);
return;
}
var info = new ProcessStartInfo(Environment.GetEnvironmentVariable("CXX") ?? "gcc", "-v")
{
RedirectStandardError = true,
CreateNoWindow = true,
UseShellExecute = false
};
var process = Process.Start(info);
if (process == null)
throw new SystemException("GCC compiler was not found.");
process.WaitForExit();
var output = process.StandardError.ReadToEnd();
var match = Regex.Match(output, "(gcc|clang) version (([0-9]+\\.[0-9]+)\\.[0-9]+)");
if (!match.Success)
throw new SystemException("GCC compiler was not found.");
compiler = match.Groups[1].ToString();
longVersion = match.Groups[2].ToString();
shortVersion = match.Groups[3].ToString();
}
public void SetupLinux(string headersPath = "")
{
MicrosoftMode = false;
NoBuiltinIncludes = true;
NoStandardIncludes = true;
GetUnixCompilerInfo(headersPath, out var compiler, out var longVersion, out var shortVersion);
AddSystemIncludeDirs(BuiltinsDir);
var majorVersion = shortVersion.Split('.')[0];
// Workaround https://github.com/llvm/llvm-project/issues/53152, remove once bug is fixed.
AddArguments(int.Parse(majorVersion) >= 11 ? $"-fgnuc-version=10.1" : $"-fgnuc-version={longVersion}");
string[] versions = { longVersion, shortVersion, majorVersion };
string[] triples = { "x86_64-linux-gnu", "x86_64-pc-linux-gnu" };
if (compiler == "gcc")
{
foreach (var version in versions)
{
AddSystemIncludeDirs($"{headersPath}/usr/include/c++/{version}");
AddSystemIncludeDirs($"{headersPath}/usr/include/c++/{version}/backward");
foreach (var triple in triples)
{
AddSystemIncludeDirs($"{headersPath}/usr/include/{triple}/c++/{version}");
AddSystemIncludeDirs($"{headersPath}/usr/include/c++/{version}/{triple}");
}
}
}
foreach (var triple in triples)
{
foreach (var version in versions)
{
AddSystemIncludeDirs($"{headersPath}/usr/lib/{compiler}/{triple}/{version}/include");
AddSystemIncludeDirs($"{headersPath}/usr/lib/{compiler}/{triple}/{version}/include/c++");
AddSystemIncludeDirs($"{headersPath}/usr/lib/{compiler}/{triple}/{version}/include/c++/{triple}");
}
AddSystemIncludeDirs($"{headersPath}/usr/include/{triple}");
}
AddSystemIncludeDirs($"{headersPath}/usr/include");
AddSystemIncludeDirs($"{headersPath}/usr/include/linux");
}
private bool setupDone;
public void Setup(TargetPlatform targetPlatform)
{
if (setupDone) return;
SetupArguments(targetPlatform);
if (!NoBuiltinIncludes)
SetupIncludes(targetPlatform);
setupDone = true;
}
private void SetupArguments(TargetPlatform targetPlatform)
{
LanguageVersion ??= CppSharp.Parser.LanguageVersion.CPP14_GNU;
// As of Clang revision 5e866e411caa we are required to pass "-fgnuc-version="
// to get the __GNUC__ symbol defined. macOS and Linux system headers require
// this define, so we need explicitly pass it to Clang.
// Note that this setup is more accurately done in the platform-specific
// setup methods, below is generic fallback in case that logic was disabled.
if (NoBuiltinIncludes)
{
switch (targetPlatform)
{
case TargetPlatform.MacOS:
case TargetPlatform.Linux:
AddArguments("-fgnuc-version=4.2.1");
break;
}
}
switch (LanguageVersion)
{
case CppSharp.Parser.LanguageVersion.C99:
case CppSharp.Parser.LanguageVersion.C99_GNU:
AddArguments("-xc");
break;
default:
AddArguments("-xc++");
break;
}
switch (LanguageVersion)
{
case CppSharp.Parser.LanguageVersion.C99:
AddArguments("-std=c99");
break;
case CppSharp.Parser.LanguageVersion.C99_GNU:
AddArguments("-std=gnu99");
break;
case CppSharp.Parser.LanguageVersion.CPP98:
AddArguments("-std=c++98");
break;
case CppSharp.Parser.LanguageVersion.CPP98_GNU:
AddArguments("-std=gnu++98");
break;
case CppSharp.Parser.LanguageVersion.CPP11:
AddArguments("-std=c++11");
break;
case CppSharp.Parser.LanguageVersion.CPP11_GNU:
AddArguments("-std=gnu++11");
break;
case CppSharp.Parser.LanguageVersion.CPP14:
AddArguments("-std=c++14");
break;
case CppSharp.Parser.LanguageVersion.CPP14_GNU:
AddArguments("-std=gnu++14");
break;
case CppSharp.Parser.LanguageVersion.CPP17:
AddArguments("-std=c++17");
break;
case CppSharp.Parser.LanguageVersion.CPP17_GNU:
AddArguments("-std=gnu++17");
break;
case CppSharp.Parser.LanguageVersion.CPP20:
AddArguments("-std=c++20");
break;
case CppSharp.Parser.LanguageVersion.CPP20_GNU:
AddArguments("-std=gnu++20");
break;
case CppSharp.Parser.LanguageVersion.CPP23:
AddArguments("-std=c++2b");
break;
case CppSharp.Parser.LanguageVersion.CPP23_GNU:
AddArguments("-std=gnu++2b");
break;
}
if (!EnableRTTI)
AddArguments("-fno-rtti");
}
internal string BuiltinsDirBasePath
{
get
{
var version = ClangVersion.Split(".").First();
return Path.Combine("lib", "clang", version, "include");
}
}
public string BuiltinsDir
{
get
{
var assemblyDir = Path.GetDirectoryName(Assembly.GetEntryAssembly()?.Location);
if (assemblyDir == null)
throw new InvalidOperationException();
return Path.Combine(assemblyDir, BuiltinsDirBasePath);
}
}
private void SetupIncludes(TargetPlatform targetPlatform)
{
// Check that the builtin includes folder exists.
if (!Directory.Exists(BuiltinsDir))
throw new Exception($"Clang resource folder '{BuiltinsDirBasePath}' was not found.");
switch (targetPlatform)
{
case TargetPlatform.Windows:
SetupMSVC();
break;
case TargetPlatform.MacOS:
SetupXcode();
break;
case TargetPlatform.Linux:
SetupLinux();
break;
case TargetPlatform.Android:
throw new NotImplementedException();
case TargetPlatform.iOS:
case TargetPlatform.WatchOS:
case TargetPlatform.TVOS:
throw new NotImplementedException();
case TargetPlatform.Emscripten:
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
}