Can a master summoner be a wild caller?

[Raelin]

Can a master summoner be a wild caller?

[Orfamay Quest]

No. Both the normal eidolon ability and the summon monster ability are altered by both archetypes, so they're incompatible.

[Secane]

If you are playing a homebrew game, you might want to consider asking your GM if you can mix the 2 archetypes.