# perlbrew switch perl-5.10.1
# rm -rf ~perl5/perlbrew/perls/perl-5.22.0
# perlbrew available
# perlbrew --notest install perl-5.22.0 

##</code><code>##

# perlbrew switch perl-5.22.0
# perlbrew install-cpanm
# cpanm -n Inline::C
# sudo apt-get install libgmp-dev
# cpanm Math::GMP