Can LDC compile to supported legacy LLVM versions?

[Dukc]

I have recenty updated my LDC to the most recent version (1.14). 
The problem is that it compiles to LLVM code version 7.0.1, but I 
need it to compile to LLVM 6.x.x or LLVM 5.x.x. The last release 
note said that LLVM versions from 3.something.something are 
supported, but does this mean only linking to them, or also 
compiling to them?

If it can be done, how? Thanks.