GCC Version inside Docker

May I know how to know the version of GCC installed inside a docker?

when I tried

cat /proc/version

It returned with

gcc version 4.2.0 20170510 (Ubuntu 4.2.0-6ubuntu1~14.04.12)

When I used

gcc -v

it returned

gcc version 7.2

I need to use GCC 7.2 inside my docker but I wonder why is it showing GCC 4.2 when I use cat /proc/version

1 Answer

The version in /proc/version is the version of the GCC compiler used to build your linux kernal of your host machine

The gcc -v is the version of the compiler installed in the docker container