/// <summary>
/// Gets the default compiler which should be used, if it's not set explicitly by the target, command line, or config file.
/// </summary>
/// <returns>The default compiler version</returns>
internal static WindowsCompiler GetDefaultCompiler()
{
// If there's no specific compiler set, try to pick the matching compiler for the selected IDE
object ProjectFormatObject;
if (XmlConfig.TryGetValue(typeof(VCProjectFileGenerator), "Version", out ProjectFormatObject))
{
VCProjectFileFormat ProjectFormat = (VCProjectFileFormat)ProjectFormatObject;
if (ProjectFormat == VCProjectFileFormat.VisualStudio2017)
{
return(WindowsCompiler.VisualStudio2017);
}
else if (ProjectFormat == VCProjectFileFormat.VisualStudio2015)
{
return(WindowsCompiler.VisualStudio2015);
}
else if (ProjectFormat == VCProjectFileFormat.VisualStudio2013)
{
return(WindowsCompiler.VisualStudio2013);
}
}
// Second, default based on what's installed, test for 2015 first
DirectoryReference VCInstallDir;
if (TryGetVCInstallDir(WindowsCompiler.VisualStudio2015, out VCInstallDir))
{
return(WindowsCompiler.VisualStudio2015);
}
if (TryGetVCInstallDir(WindowsCompiler.VisualStudio2013, out VCInstallDir))
{
return(WindowsCompiler.VisualStudio2013);
}
if (TryGetVCInstallDir(WindowsCompiler.VisualStudio2017, out VCInstallDir))
{
return(WindowsCompiler.VisualStudio2017);
}
// If we do have a Visual Studio installation, but we're missing just the C++ parts, warn about that.
DirectoryReference VSInstallDir;
if (TryGetVSInstallDir(WindowsCompiler.VisualStudio2015, out VSInstallDir))
{
Log.TraceWarning("Visual Studio 2015 is installed, but is missing the C++ toolchain. Please verify that \"Common Tools for Visual C++ 2015\" are selected from the Visual Studio 2015 installation options.");
}
else if (TryGetVSInstallDir(WindowsCompiler.VisualStudio2017, out VSInstallDir))
{
Log.TraceWarning("Visual Studio 2017 is installed, but is missing the C++ toolchain. Please verify that \"Common Tools for Visual C++ 2015\" are selected from the Visual Studio 2015 installation options.");
}
else
{
Log.TraceWarning("No Visual C++ installation was found. Please download and install Visual Studio 2015 with C++ components.");
}
// Finally, default to VS2015 anyway
return(WindowsCompiler.VisualStudio2015);
}
