Having multiple GCC Version at the same time

[Olivier Delannoy]

Hello,
I am trying to have various GCC environment in parallel to make some
validation on my code and test the behaviour of those various
compiler. I am using C/C++ I would like to clarify the need of having
various version of libraries and the condition to decide whether a
library must be compiled and installed for the various GCC
environment. Does C libraries have to be available for the various
compiler version ? Does C++ libraries have to be available for the
various compiler version ?