what is the relation of https://github.com/google/gf180mcu-pdk w.r.t. https://github.com/google/globalfoundries-pdk-libs-gf180mcu_fd_pr ?

The

gf180mcu-pdk

is a parent repository of which the individual libraries like

gf180mcu_fd_pr

are submodules. The

skywater-pdk

repository was done similarly; however, I am treating the GF repository slightly differently in open_pdks. For SkyWater, having the top level repository was (I think) necessary because it is necessary to run

make timing

to create all the Liberty files from raw data. GF needs no such top-level

make

, so in open_pdks I am just cloning each of the submodules independently as its own repository, and ignoring the top level repository completely.

👍