Global custom defines in Unity 5

Unity Engine
1

Unity 5 complains about global custom defines using the old naming scheme:

The Unity 5.5 manual page for Platform Dependent Compilation hasn’t been updated yet. Can I simply rename gmcs.rsp to mcs.rsp and carry on, or does the file itself need other changes?

2

Just ran into this as well. The documentation is out of date.

3

Up

4

I ended up deleting smcs.rsp file from the root of /Assets
Problem seems to be solved for me.
Unity 2017.1