libmemif: docs md->rst

Type: improvement

Change-Id: Ibebd2d47a4268189f11601d004073e4858548f25
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
diff --git a/extras/libmemif/docs/buildinstructions_doc.rst b/extras/libmemif/docs/buildinstructions_doc.rst
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+.. _libmemif_build_doc:
+
+Build Instructions
+==================
+
+Install dependencies
+--------------------
+
+::
+
+   # sudo apt-get install -y git cmake autoconf pkg_config libtool
+
+Libmemif is now part of VPP repository. Follow fd.io wiki to pull source
+code from VPP repository.
+https://wiki.fd.io/view/VPP/Pulling,_Building,_Running,_Hacking_and_Pushing_VPP_Code#Pushing_Patches
+
+Libmemif is located under extras/libmemif. From extras/libmemif:
+
+::
+
+   # mkdir build
+   # cd build
+   # cmake ..
+   # make install
+
+Verify installation:
+--------------------
+
+::
+
+   build# ./examples/icmp_responder -?
+
+Use ``-?`` flag to display help:
+
+::
+
+   LIBMEMIF EXAMPLE APP: icmp_responder_example
+   ==============================
+   libmemif version: 4.0, memif version: 2.0
+   ==============================
+   In this example, memif endpoint connects to an external application.
+   The example application can resolve ARP and reply to ICMPv4 packets.
+   The program will exit once the interface is disconnected.
+   ==============================
+   Usage: icmp_responder [OPTIONS]
+
+   Options:
+           -r      Interface role <slave|master>. Default: slave
+           -s      Socket path. Supports abstract socket using @ before the path. Default: /run/vpp/memif.sock
+           -i      Interface id. Default: 0
+           -a      IPv4 address. Default: 192.168.1.1
+           -h      Mac address. Default: aa:aa:aa:aa:aa:aa
+           -?      Show help and exit.
+           -v      Show libmemif and memif version information and exit.
+
+Examples
+--------
+
+Once the library is built/installed, refer to :ref:`libmemif_examples_doc`
+and :ref:`libmemif_gettingstarted_doc` for additional information on basic
+use cases and API usage.