==== Epiphany gdb tutorial ====
  * add to the end of ~/.bashrc
<code bash>
#FPGA environment
export QSYS_ROOTDIR="/home/tdwebste/intelFPGA_lite/16.1/quartus/sopc_builder/bin"
source ~/.setup_epiphany_rc
source ~/setenv.sh
 </code>
  * cat ~/setenv.sh
<code bash>
export XILINX_VER=2016.4
#export XILINX_VER=2015.1
#export XILINX_VER=2014.3.1
source /opt/Xilinx/Vivado/${XILINX_VER}/settings64.sh
export PATH=$PATH:/opt/Xilinx/Vivado/${XILINX_VER}/bin
</code>
  * ln -s ~/src/epiphany-sdk/sdk/setup.sh ~/.setup_epiphany_rc
  * cat ~/.setup_epiphany_rc
<code bash>
#!/bin/sh -f

#  Copyright (c) 2010, All Right Reserved, Adapteva, Inc.

#  This source is subject to the Adapteva Software License.
#  You should have received a copy of the full license file
#  named ("LICENSE") along with this program.  If not, contact
#  Adapteva immediately at support@adapteva.com

case $(uname -m) in
	x86_64)
		_esdk_arch=".x86_64"
		;;
	arm*)
		_esdk_arch=".armv7l"
		;;
	*)
		_esdk_arch=""
		;;
esac

export EPIPHANY_HOME=/opt/adapteva/esdk

if [ -z "$EPIPHANY_HOME" ]; then
	echo "Please set the EPIPHANY_HOME to the root folder of the SDK release!"
else
	PATH=${EPIPHANY_HOME}/tools/a-gnu/bin:${PATH}
	PATH=${EPIPHANY_HOME}/tools/e-gnu${_esdk_arch}/bin:${PATH}
	PATH=${EPIPHANY_HOME}/tools/host${_esdk_arch}/bin:${PATH}
	LD_LIBRARY_PATH=${EPIPHANY_HOME}/tools/host${_esdk_arch}/lib:${LD_LIBRARY_PATH}
	LD_LIBRARY_PATH=${EPIPHANY_HOME}/tools/e-gnu${_esdk_arch}/lib:${LD_LIBRARY_PATH}
	EPIPHANY_HDF=${EPIPHANY_HOME}/bsps/current/platform.hdf
	MANPATH=${EPIPHANY_HOME}/tools/e-gnu/share/man:${MANPATH}
	MANPATH=${EPIPHANY_HOME}/tools/e-gnu${_esdk_arch}/share/man:${MANPATH}

	export PATH
	export LD_LIBRARY_PATH
	export EPIPHANY_HOME
	export EPIPHANY_HDF
	export MANPATH
fi

unset _esdk_arch
</code>
     * Total lacks READMEs so you have no idea how to build this stuff.
    * git clone https://github.com/adapteva/epiphany-sdk.git sdk
      * check the git version
      * for dir in $(find . -type d -name '.git' | sed 's#\/\.git$##'); do (cd $dir; pwd; git branch); done
    * cd sdk
    * bash download-components.sh - -clone
    * wget ftp://ftp.parallella.org/esdk/beta/esdk.master.armv7l-snapshot-20161101.tar.gz
    * wget ftp://ftp.parallella.org/esdk/beta/esdk.master.x86_64-snapshot-20161101.tar.gz
    * mkdir /opt/adapteva; cd /opt/adapteva
    * ln -s esdk.master esdk
    * source ./setup.sh
    * it may be necessary to install guile
    * bash build-toolchain.sh --clean --clean-host --clean-build
    * bash build-pal.sh
    * bash build-epiphany-libs.sh
    * It is not necessary and it is not possible to build-epiphany-sdk.sh Please use the prebuild sdk previously downloaded.