mingw on cmd.com: The input line is too long

[Ralf Habacker]

> The problem we have is with a modern cmake and include paths.
> They grow a lot depending on the path where the source code resides.
>
>   
>> The only idea I've is to shorten the kde tempdir path and/or ask tt for
>> help.
>>     
It helps a lot to make the source path as short as possible or this is 
not possible to substitute the toplevel source dir with a virtual drive 
letter by using the "subst" command
eg when source is in d:\some-long-dirs\svn you may create a virtual 
drive by

    subst e:\ d:\some-long-dirs\svn

and

    set KDESVNDIR=e:\

additional when the problem is more in sources fetched from non kde or 
git repositories the download dir could also be substituted

    subst f:\ d:\some-long-dirs\download

    set DOWNLOADDIR=f:\