How to force Sphinx to use Python 3.x interpreter

Question

I try to create documentation for a project written with Python 3.x. Sphinx is the tool I want to use and, according to the official site, its last version 1.1.2 is

Answer 1

Installation: Install sphinx with pip for python3(pip3 like that).

    pip3 install -U sphinx

Building: Makefile(linux/Mac) changes.

    SPHINXBUILD   = python -msphinx

In above line in Makefile change python to python3(or python3.x) like

   SPHINXBUILD   = python3 -msphinx

if default python is pointing to 2.x version python.