perl -MPDL -MAlien::GSL -E "say join ' ', Alien::GSL->version, Alien::GSL->install_type; say $PDL::VERSION"

##</code><code>##

2.3 system
2.077

##</code><code>##

2.5 system
2.060

##</code><code>##

2.6 system
2.077