I am unsure it is useful to add a test for all OSxfuse_ld_value combinations, especially for an ELF OS like NetBSD which shares many characteristics with other ELF OSes. It will be overwhelming.
The option may be better added in a netbsd specific file.
I noticed there is a fuse-ld-windows.c file with some tests, so would putting NetBSD ones in a new fuse-ld-netbsd.c file make sense?
Either way, I don't have any strong opinion on this. I can also drop the revision if those tests do not seem useful.
Windows is very different from all other OSes. Having a fuse-ld-windows.c may be fine. Again, NetBSD shares many characteristics with other OSes and having a -fuse-ld=lld
test for all ~10 ELF OSes Clang supports seems too much.