[centos 6.5] gcc 4.6.2 setup

qt creator 를 실행하려고 했는데, GLIBCXX_3.4.14 에러가 발생하여 아래의 출처대로 설치를 해주었다.

https://rajivpandit.wordpress.com/2013/11/15/install-qt5-on-centos-6-4-and-fix-glibcxx_3-4-15-not-found-error-in-qt5-install/

http://www.qtcentre.org/threads/59300-Qt5-3-0-starting-error-usr-lib64-libstdc-so-6-version-GLIBCXX_3-4-15-not-fo

https://gcc.gnu.org/wiki/InstallingGCC