dft_tools/doc/installation/requirements.rst

.. index:: Required libraries

.. _requirements:

A complete list of requirements
===============================

TRIQS is built upon several python and C++ libraries, which, if not present
already in your system, can be freely downloaded and installed. All the
libraries and tools used by TRIQS are described below.

.. _require_cxx_compilers:

C++ compilers
-------------

TRIQS is written in C++, i.e. in the **C++11** standard as defined by the ISO standardization committee.
A recent compiler is therefore mandatory.

* Standard compliant C++ compilers (recommended and supported).
  
  * :ref:`clang 3.2<install_clang>` and higher (in particular the default clang on OS X 10.8).
  * g++ 4.8.1 and higher

  * The intel icc 14.0 is close to be C++11 compliant, but presents currently too many bugs to be supported 
    at present. It compiles 99% of TRIQS, but we do not have the ressources to write and 
    maintains all necessary workarounds.
    
    Besides, for *our codes*, icc does not provide a significant speed gain (unlike MKL), 
    so we do not recommend it for TRIQS.

* C++98 compilers

  * g++ before 4.8.1
  * Intel icc 13.0 and below

  Compilers implementing the previous version of the C++ standard (C++98) do not work and 
  will *not* be supported.



Libraries
---------

+------------------------+----------+------------------------------------------------------------------------+
| Library/tool           | Version  | Comment                                                                |
+========================+==========+========================================================================+
| mpi                    | openmpi  | Parallelism (1).                                                       |
| fftw                   | >= 3.2   | Fourier transforms                                                     |
| boost                  | >= 1.49  | C++ librairies                                                         |
| hdf5                   | >= 1.8.0 | File storage system. Important: the *serial* version must be installed |
| python                 | >= 2.6.5 | The Python interpreter                                                 |
| scipy                  | >= ?     | Python mathematical library                                            |
| numpy                  | >= ?     | Python scientific library                                              |
| h5py                   | >= ?     | Python interface to hdf5 library                                       |
| mpi4py                 | >= ?     | Python MPI                                                             |
| sphinx                 | >= 1.0.1 | Python documentation tools (to compile documentation)                  |
| cmake                  | >= 2.8.7 | CMake is used to control the software compilation process              |
| pyparsing              | >= ?     | Tool for sphinx (to compile documentation)                             |
| sphinxcontrib-doxylink | >= ?     | Tool for sphinx (to compile documentation)                             |
| matplotlib             | >= 0.99  | Python 2D plotting library                                             |
| cython                 | >=0.17   | A language that allows to write C extensions for the Python language   |
+------------------------+----------+------------------------------------------------------------------------+

(1)  Since standard linux distributions (and macports on OS X) now provides openmpi, even on laptops, we avoid the unnecessary complication of maintaining a non-parallel version of TRIQS