Auxiliary Programs
==================

Besides the main ``yosys`` executable, the Yosys distribution contains a
set of additional helper programs.

yosys-config
------------

The ``yosys-config`` tool (an auto-generated shell-script) can be used
to query compiler options and other information needed for building
loadable modules for Yosys. FIXME: See
Sec. `[chapter:prog] <#chapter:prog>`__ for details.

.. _sec:filterlib:

yosys-filterlib
---------------

The ``yosys-filterlib`` tool is a small utility that can be used to
strip or extract information from a Liberty file. See
Sec. `[sec:techmap_extern] <#sec:techmap_extern>`__ for details.

yosys-abc
---------

This is a fork of ABC with a small set of custom modifications that have
not yet been accepted upstream. Not all versions of Yosys work with all
versions of ABC. So Yosys comes with its own yosys-abc to avoid
compatibility issues between the two.