mirror of
https://github.com/triqs/dft_tools
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107 lines
4.2 KiB
ReStructuredText
107 lines
4.2 KiB
ReStructuredText
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.. index:: install_options
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.. highlight:: bash
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.. _install_options:
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Customizing installation : cmake options
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----------------------------------------------------
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Specifying the compiler or compile/link flags
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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To specify the compiler with cmake one may use the CXX, CXXFLAGS variables, e.g. ::
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CXX=clang++ CXXFLAGS cmake path_to_TRIQS_source_directory .....
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Customize the installation
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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You can then customize the installation options using the :program:`ccmake` program::
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ccmake .
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This opens an interface with your main installation options shown ::
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BUILD_SHARED_LIBS ON
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Build_CTHyb ON
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Build_Documentation OFF
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Build_HubbardI ON
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Build_Triqs_General_Tools_Test ON
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Build_Wien2k ON
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CMAKE_INSTALL_PREFIX /home/parcolle/BUILD2/Triqs_dynamic/INSTALL_DIR
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Install_dev OFF
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LAPACK_LIBS /usr/lib/liblapack.so;/usr/lib/libblas.so;/usr/lib/libpthread.so;/usr/lib/libblas.so
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PYTHON_INTERPRETER /usr/bin/python
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You can for instance change the following options:
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* ``CMAKE_INSTALL_PREFIX``: This is the directory :file:`path_to_TRIQS_install_directory` where you want to install TRIQS.
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* ``Build_CTHyb``: Build the continuous-time hybridization impurity solver.
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* ``Build_HubbardI``: Build a simple HubbardI solver.
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* ``Build_Wien2k``: Build the interface to **WIEN2K**.
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* ``Build_Documentation``: Get the documentation locally in :file:`path_to_TRIQS_install_directory/share/doc`.
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You may change all other installation options (like locations of libraries, the choice of compilers, etc.) in the advanced mode, by typing 't' after having opened the *ccmake* interface.
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After having corrected your options you may build, test and install TRIQS as described in :ref:`installation`.
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.. _install_without_boost:
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Installation with your own version of boost [-DBOOST_INSTALL_DIR=...]
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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If you have a sufficiently recent version of boost already installed in your system you may
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link TRIQS with it instead of compiling a new version of boost from sources.
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In this case, the cmake instruction is ::
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cmake path_to_TRIQS_source_directory -DBOOST_INSTALL_DIR=root_path_to_Boost_installation ....
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The cmake option `DBOOST_INSTALL_DIR` is the path to the **boost** libraries.
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The default value is :
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* BOOST_INSTALL_DIR : /usr
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So if boost is at the right place, you can just say::
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cmake path_to_TRIQS_source_directory
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**Obviously, you should not specify `DBOOST_SOURCE_DIR` in this case!**
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.. _static_dyn :
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Static versus dynamic linking [-DBUILD_SHARED_LIBS=OFF]
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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TRIQS can be compiled in two different ways:
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* **dynamic linking** [default] :
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This is the standard python procedure and the default choice.
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All the C++ codes are compiled in shared libraries and loaded dynamically at runtime by the python interpreter.
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With this technique however, you have to properly set the PYTHONPATH environment variable to the TRIQS installation directory in order
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for python to be able to find the module. To avoid errors, TRIQS provides a
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tiny script :file:`path_to_TRIQS_install_directory/bin/pytriqs` that sets up this variable for you and launch the python interpreter.
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* **static linking** :
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An alternative is to compile a new interpreter statically.
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Here the C++ modules are linked with libpython2.x.a to create a *new python interpreter* :file:`path_to_TRIQS_install_directory/bin/pytriqs`
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that contains these modules as *built-in* modules.
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Though it is not as standard and extensible as the dynamic linking, this technique has several advantages :
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* It avoids opening dynamic libs, which simplifies code profiling for example.
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* It may be more stable on some cluster machines (the boost.mpi modules in this case is also linked statically).
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In any case, both the scripts and the way to call them remain the same in both cases::
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pytriqs myscript.py
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The choice is made with the cmake option ::
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-DBUILD_SHARED_LIBS=OFF/ON
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