ld: unknown option: -T

[jan-matula]

When I try to build rustboot64 (using make command), I get this error:

ld -T app.ld -o kernel64.sys kernel64.o
ld: unknown option: -T
make: *** [kernel64.sys] Error 1

So what's the problem here? I don't really understand LD, but when I search for the -T option I can't find anything, so it seems like that option really doesn't exist. Sorry if this question is stupid, but as I already said I can't use LD.

*I am on macOS Sierra