George Hartzell 4d72e0fb9d Make the cpanm version a variant ...

Rather than hard-coding the verison of `cpanm` that's [optionally]
installed into the core, make it a variant with a default value of
'1.7042'.

Also discovered that `prefix + 'bin'` is the same as `prefix.bin`, so
embetter that bit of code.

2016-08-02 11:16:46 -04:00

..

spack

Make the cpanm version a variant

2016-08-02 11:16:46 -04:00