Installation of Double-Precision Gromacs 5.1.5

GROMACS version: 5.1.5
Dear All
I want to calculate the entropy of protein-ligand system for Gibbs free energy calculation by gmx covar,anaeig for which i need to minimize the structure with double precision gromacs as mentioned in the manual. I uninstalled previous single precision version and tried to compile double-precision version of gromacs 5.1.5 using:
sudo make check
sudo make install
source /usr/local/gromacs/bin/GMXRC

On checking the version, it still shows single precision version.
Have i skipped any step during the compilation and installation process?
Your help in this regard will be highly appreciated.

Thanks and Regards

Gagandeep SIngh