VS2019 always recompile a whole project because of invalid stdafx.h.cpp content

return commands.join('\n');

commandLinesForOutput()

static QString vcxCommandSeparator()
{
 // MSBuild puts the contents of the custom commands into a batch file and calls it.
 // As we want every sub-command to be error-checked (as is done by makefile-based
 // backends), we insert the checks ourselves, using the undocumented jump target.
 static QString cmdSep =
 QLatin1String("
if errorlevel 1 goto VCEnd
");
 return cmdSep;
}

static QString commandLinesForOutput(QStringList commands)
{
    // MSBuild puts the contents of the custom commands into a batch file and calls it.
    // As we want every sub-command to be error-checked (as is done by makefile-based
    // backends), we insert the checks ourselves, using the undocumented jump target.
    static QString errchk = QStringLiteral("if errorlevel 1 goto VCEnd");
    for (int i = commands.count() - 2; i >= 0; --i) {
        if (!commands.at(i).startsWith("rem", Qt::CaseInsensitive))
            commands.insert(i + 1, errchk);
    }
	
    return commands.join("
");
}