.. include:: /../getting_started/vars.rst

.. _section-General-611:

General Compatibility 6.1.1
*************************** 

This section describes issues that may affect backward 
compatibility in the *Connext* suite in release 6.1.1. 

See also :ref:`section-Product-Index-611` for specific issues. For information 
about the RTPS versions supported for each |CONNEXT| release, 
see :numref:`section-General-RTPS`.


.. _section-MG-69-611:

Potential -fPIC flag issue when using static libraries in Linux and QNX if upgrading from 6.1.0
===============================================================================================
In 6.1.0, RTI no longer built Linux or QNX static libraries with the ``-fPIC`` flag 
(whereas previously RTI did build with this flag). Therefore, in 6.1.0, you 
could no longer link Linux or QNX static libraries with object files built 
with the ``-fPIC`` flag. 

Updating to 6.1.1 fixes this problem, because RTI builds Linux and QNX static 
libraries with the ``-fPIC`` flag again in 6.1.1. Therefore:

* If you are upgrading to 6.1.1 from a release before 6.1.0, you do not need 
  to do anything. 
* If you are upgrading from 6.1.0 to 6.1.1 and you used Linux or QNX static libraries, 
  you may need to change the way you build object files to use the ``-fPIC`` flag 
  if you aren't using the ``-fPIC`` flag already.