summoner rule query

[Braininthejar2]

Enlarge person is on a summoner's spell list.

If an ifrit summoner gains enlarge person SLA as an alternative racial feature, can he use it on his eidolon through its 'share spells' feature?

[Powerdork]

The share spells ability of an eidolon has a specific provision for this:

This ability does not allow the eidolon to share abilities that are not spells, even if they function like spells.