Main runtime template C code : Added HAVE_RETAIN preprocessor definition for customized build to signal it provides IEC-61131 Retain memory handling function. Removed targets/Xenomai/plc_Xenomai_noretain.c, now useless.

Beremiz's user manual
=====================

Contents:

.. toctree::
   :maxdepth: 2

   install
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   edit
   build
   connectors
   debug