[Lazarus] With new Win32 manifest LongPathAware I cannot make long filename

[Michael Van Canneyt]

On Fri, 23 Nov 2018, AlexeyT via lazarus wrote:

> This app cannot make 2nd folder (it can make 1st) and make file. Error 
> on file saving. why? new manifest option is used. Win10.
>
> { TForm1 }
>
> const
> s1='w123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012';
>   base='c:\work\';
>
> procedure TForm1.Button1Click(Sender: TObject);
> var f: TStringList;
> begin
>   ForceDirectories(base+s1+'\'+s1);

ForceDirectories is in the FPC RTL. 
It probably would need to obey the \\?\ prefix if long paths are to be
supported.

Michael.