docs-rst: enable the Sphinx math extension

import sys

import os

import sphinx

# Get Sphinx version

major, minor, patch = map(int, sphinx.__version__.split("."))

# If extensions (or modules to document with autodoc) are in another directory,

# add these directories to sys.path here. If the directory is relative to the

# ones.

extensions = ['kernel-doc', 'rstFlatTable', 'kernel_include']

# The name of the math extension changed on Sphinx 1.4

if minor > 3:

    extensions.append("sphinx.ext.imgmath")

else:

    extensions.append("sphinx.ext.pngmath")

# Add any paths that contain templates here, relative to this directory.

templates_path = ['_templates']