intermediate stem length in long glissando

[Mason Hock]

From

http://lilypond.org/doc/v2.18/Documentation/notation/expressive-marks-as-lines#glissando

"If the stems do not align well with the glissando, they may need to be repositioned slightly."

Is there a way of automatically extending the stems precisely to the gliss line rather than manually determining which hidden note will get it closest? I suspect not, but I use enough long glissandi that I thought I'd ask.

Thanks,

Mason