Infinitival relative clause or catenative complement?

I came across an interesting discussion online today. The sentence in question is this: "I want something to eat."

One poster suggested that "to eat" is in fact an infinitival relative clause. In other words, one can parse the sentence as: "I want something that I can eat." I thought that this was crazy, but, after referring to The Cambridge Grammar of the English Language, Huddleston and Pullum seem to co-sign this analysis.

Then, another poster suggested that "to eat" is simply a catenative complement and"something" has been raised to object of the matrix clause. It would seem to make sense as one can easily move "to eat" and come up with a sentence similar in meaning: "I want to eat something."

What's your take on this, everyone? I am leaning toward infinitival relative in the first case ("I want something to eat") and catenative complement in the second case ("I want to eat something"), but whether or not that makes any sense, who knows! HUGE thanks in advance!