.. index:: GCC suite
.. _GCC suite:

GCC suite
=========

Description
-----------

The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Java, Ada, and Go, as well as libraries for these languages (libstdc++, libgcj,...).  It produces binaries which, depending upon the application, can be highly competitive with those produced by the :ref:`Intel suite`.

User instructions
-----------------

GCC 6.3.0 is installed on all the workstations from the repositories.  Newer and older versions can be used by loading the appropriate mdoule into your environment.

.. code-block:: bash

    $ module load gcc/7.1.0

.. note::

    Most libraries are not compiled for versions of gcc other than 6.3 but can be recompiled upon request with if required.

Source
------

http://gcc.gnu.org/

License
-------

GNU General Public License v3 and GNU Lesser General Public License v2.1.  There is also an exception granted for the GCC Runtime Library.

Admin notes
-----------

Do not compile GCC directly on an NFS-mounted drive.  The documentation warns weird things can result and I can confirm this...

.. code-block:: bash

    tar -xf gcc-7.1.0.tar.bz2
    (cd gcc-7.1.0; ./contrib/download_prerequisites)
    mkdir build-7.1.0; cd build-7.1.0
    ../gcc-7.1.0/configure --prefix=/common/debian/9.1/Core/gcc/gcc-7.1.0 --disable-multilib
    make
    make install