@@ -12,13 +12,28 @@ migration strategy for Mantid.
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@@ -12,13 +12,28 @@ migration strategy for Mantid.
Building Against Python 3
Building Against Python 3
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This is currently only possible on a Linux system with a pre-installed version of python 3 and you will need to have
This is currently possible on Ubuntu or Windows.
the latest version of the `mantid-developer` package installed. Once installed run cmake as standard but with the additional option ``-DPYTHON_EXECUTABLE=/usr/bin/python3``. Please note that
Please note that reconfiguring an existing Python 2 build is not supported - a build in a fresh build directory is required.
reconfiguring an existing Python 2 build is not supported - a build in a fresh build directory is required.
Ubuntu
^^^^^^
Install the latest version of the `mantid-developer` package. Once installed run cmake as standard but with the additional option ``-DPYTHON_EXECUTABLE=/usr/bin/python3``.
.. warning::
.. warning::
Do not install python packages via ``pip``. Install packages only from the system repositories.
Do not install python packages via ``pip``. Install packages only from the system repositories.
Windows
^^^^^^^
All of the required packages are in the third-party bundle that will be fetched for you.
To build from the command line run cmake as standard but with the additional option ``-DWITH_PYTHON3=ON``.
To build from the GUI ensure the previous cache has been deleted, set the source and build directories as usual
but before clicking configure click "Add Entry" and add an entry with the name ``WITH_PYTHON3`` of type ``BOOL``
and ensure the Value is checked. Now proceed to configure and generate as usual.
