title: howto change location of .vimrc and .vim
body: <p>How can I change the location of the .vim folder and the .vimrc file so that I can use two (or more) independent versions of vim? Is there a way to configure that while compiling vim from source? (maybe an entry in the feature.h?)</p>
  
  <p>Why do I want to do such a thing?:
  I have to work on project that use python2 as well as python3, therefore I want to have two independent vim setups with different plugins, configurations etc. Moreover, one version has to be compiled with +python, the other with +python3.</p>