the official documents for mysql 5.6 install
key steps:
# Preconfiguration setup
shell>groupadd mysql
shell>useradd -r -g mysql mysql
# Beginning of source-build specific instructions
shell>tar zxvf mysql-VERSION.tar.gz
shell>cd mysql-VERSION
shell>cmake .
shell>make
shell>make install
# End of source-build specific instructions
# Postinstallation setup
shell>cd /usr/local/mysql
shell>chown -R mysql .
shell>chgrp -R mysql .
shell>scripts/mysql_install_db --user=mysql
shell>chown -R root .
shell>chown -R mysql data
shell>bin/mysqld_safe --user=mysql &
# Next command is optional
shell>cp support-files/mysql.server /etc/init.d/mysql.server
mysql_install_db creates a default option file named my.cnf in the base installation directory. This file is created from a template included in the distribution package named my-default.cnf. For more information, seeSection 5.1.2.2, “Using a Sample Default Server Configuration File”.
more details for the install steps:
http://dev.mysql.com/doc/refman/5.6/en/installing-source-distribution.html