Long paths result in nonportable tar files

This isn't really a bug, but the CRAN guidelines for R packages do not like paths with long file names since technically they are not supported by the tar format, which has a 100 byte limit. Most (or all?) modern tar implementations don't have a problem with this, so the complaint is annoying, but I was wondering if there is a sensible way to shorten some of the paths in Boost.

The two that cause a problem for me in particular are these:
"boost/numeric/odeint/stepper/generation/generation_controlled_adams_bashforth_moulton.hpp"
"boost/numeric/odeint/stepper/generation/generation_runge_kutta_cash_karp54_classic.hpp"

The "generation" portion is repetitive, so perhaps that could be removed from the file names?

Sorry for the irritating complaint.

EDIT: For clarification, the paths in boost are not longer than 100 bytes, but since they're part of an R package, the full path name is longer.