GCC related issue(Need to install latest version of GCC 4.9.0)

Question

I am using Ubuntu 14.04 LTS. I want to install latest version of GCC 4.9.0. Is it possible to uninstall default GCC compiler prepacked with OS?

In this link, I read that uninstalling the default compiler may lead to stability issues Since I am planning to install the latest version, will that cause stability issue?

And another problem is that in the official GNU GCC page, I read that GCC supports compiling of c++ programs. But I couldn't compile a program using gcc. So, I used g++. By using g++ instead of GCC, It gave an error stating that g++ is not installed. Wouldn't Ubuntu come along with g++ or is there any other config to use g++ with GCC?

Answer 1

You will need to build from sources gcc-4.9 (latest version is 4.9.1), here is a good, step by step, description of how to build and install gcc-4.9.1 on Ubuntu 14.04:

https://solarianprogrammer.com/2014/08/26/building-gcc-on-ubuntu-linux/

A short resume of what you need to do, please check the above link for more details:

• Install build-essentials, gawk, m4, gcc-multilib
• Download the source code for GMP, MPC, MPFR, GCC
• Build and install them in this order (see the link for details):
  • GMP
  • MPFR
  • MPC
  • GCC

After that you should be able to invoke gcc-4.9.1, g++-4.9.1 and gfortran-4.9.1 from the Terminal.