How to change gcc version linux

Question

I have gcc-4.6 & gcc-4.7 both installed on my machine and I made gcc the default compiler. But still I could see 4.6 under "cat /proc/version" but I want 4.7 in place of 4.6.

cat /proc/version 
Linux version 3.2.0-4-rt-686-pae (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-14) ) #1 SMP PREEMPT RT Debian 3.2.65-1+deb7u2

How can I change gcc version here from 4.6 to 4.7 ?

Any help would be really helpfull for me.

Many Thanks.

Answer 1

As the same problem is mentioned here https://askubuntu.com/questions/193539/having-2-versions-of-gcc I suggest you to check the solution.