Easy install guide for SH GNU tools in Cygwin

(1) Download binary package (e.g. sh-elf-4.1.cygwin.tar.gz) and setup script ( named "tkbuildsetupSH.sh" ) to the C:\tmp directory.
(2) Invoke Cygwin.
(3) Extract binary package at the "/usr/local" directory in the Cygwin. 
　 $ cd /usr/local
　 $ tar zxvf /cygdrive/c/tmp/sh-elf-4.1.cygwin.tar.gz
(4) Setup environment variables. We introduced two methods, select the (4-1) or (4-2). 
(4-1) Execute GNU tool setup script ( named "tkbuildsetupSH.sh" ) 
　 $ cd 
　 $ mv /cygdrive/c/tmp/tkbuildsetupSH.sh .
　 $ . tkbuildsetupSH.sh 
(4-2) Append the following environment variables to the ".bashrc"
　export BD=/home/tkernel/tkv10202/tkernel_source
　export GNUs=/usr
　export GNU_BD=/usr/local/sh-elf
　export GNUsh=$GNU_BD
　export GCC_EXEC_PREFIX=$GNU_BD/lib/gcc/
　export COMPILER_PATH=$GNU_BD/libexec/gcc/
　PATH=$PATH:$HOME/bin:$GNUsh/bin:$GNU_BD/bin

After appending, update ".bashrc" file.
　 $ source .bashrc

(Note) The value of showing "BD" is an example directory for T-Kernel base directory. Please change it according to your T-Kernel environment.
(5) Verify the installation of GNU tool.
　 $ sh-elf-gcc --version 
　sh-elf-gcc (GCC) 4.1
　Copyright (C) 2006 Free Software Foundation, Inc.
　This is free software; see the source for copying conditions. There is NO
　warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.