That would be ideal, but QMake was the system used when the project started. We're considering porting everything to CMake, but it looks like it's going to take some doing.
@Pl45m4
I tried to use the search function, but those seem to be good sources that I hadn't seen yet. I'll take a look at those right now. But I was able to find an answer on StackOverflow that I somehow missed until now:
https://stackoverflow.com/questions/32279193/cuda-win7-qt-creator-lnk1104-cannot-open-file-cuda-file-obj
I just copy-pasted it and it worked (after changing the version number from 7.0 to 12.1). Then I used the code I pasted above and it worked. Then I used a legit CUDA program and it worked. So I'm going to go through it line by line to understand why that .pro works. Thank you for the links!