Homebrew default compiler

I have read similar topics here, but unfortunately these solutions does not help me.

I would like to recompile all installed software (or at least some formulas) from Homebrew using gcc from Homebrew.

Is it possible to force Homebrew to use gcc?

I have tried to set all kinds of environment variables, but it does not help :/ ?

0/> env | grep CC
HOMEBREW_CC=gcc
CC=/usr/local/bin/gcc

The reason for doing that is that I want to compile some code* with gcc and link against libraries installed from brew. But it seems that gcc can't link to libs built by clang. On other side it lacks support of some C++11 features which are required by the program* i would like to compile.

So only solution that I see, is to recompile all needed libs with gcc.

Thank you for help.