https://creativecommons.org/faq/#could-i-use-a-cc-license-to-share-my-logo-or-trademark
It appears #creativecommons recommends against a CC license, but I guess it depends a bit on the use case.
As usual, this is so complicated 
I think I now understand trademark and copyright are entirely different things.
Given that my context is a #foss library, I don't think trademark makes much sense.
To make sure no funny business happens with the logo, I guess I could opt CC BY-NC-ND? (https://creativecommons.org/licenses/by-nc-nd/4.0)
It's not trademark but we're talking about a simple library. This should at least prevent the logo from being used improperly…
--> I think <--
@yarmo I guess we have to be careful that the NC bit makes the license incompatible with open source licenses which prohibits discrimination of the field of use.
@zundan well, theoretically speaking, wouldn't this mean if people wanted to use the library in a commercial application, they could still do so but just not use the logo…?
(The library is AGPL btw)
@yarmo theoretically yes, but, as a former package maintainer for a small Linux distribution, I can imagine the mixture of NC licensed material would make downstream distributions much harder.
@zundan thanks for your input!
Ok, maybe skip NC. BY is already nice to have.
Also not sure how I feel about ND yet