I Googled "attiny85 spi library" and got 35,800 hits, if that helps.
I've gone through MOST of those search options and had little luck. Googling your given parameters gives this search result
No results found for "attiny85 spi library". Most of the search results link either back to here or to other people asking about a library.
I realized, after I rested, that I was missing the download link for the libraries posted in the forum linked above. Embarrassingly enough, I had my browser sized weirdly and the bottom of the page was cutoff, so the page wasn't displaying attachments. I thought the attached library was just your example-but now I've found what I was missing from your previous threads.
Thank you folks! I'm a bit stressed because I've had about 10 weeks of basic C instruction in my 30+ years on this spinny blue thing and I'm trying to learn as much as possible as quickly as possible. I'm rebooting my career, getting away from small business consulting and retraining to be an electronics engineer. It's a LOT tougher with kids, a mortgage, and a fat belly to find time to learn this stuff-especially when running a business, being a stay at home dad, and going to school full time.
I can go from "aha!!! I'm starting to get it...It's not that hard" to "I'm an idiot who should have taken programming classes in the 90's and now I'm too old to learn this stuff" in a few seconds.