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Hi, I am trying to synthesis with another liberty file "sky130_fd_sc_lp". I also did the GLS, but i got this issue. I think there is missing module named "sky130_fd_sc_lp__bushold0". Any suggestion what kind of module is this?

It's a tristate component. <https://en.wikipedia.org/wiki/Bus-holder>

<https://www.electronics-tutorials.ws/logic/logic_9.html>

It looks like the PDK is missing that particular module

<https://github.com/google/skywater-pdk-libs-sky130_fd_sc_lp/tree/e2c1e0646999163d35ea7b2521c3ec5c28633e63/cells/bushold0>

Neither of the modules in this file contain any data

<https://github.com/google/skywater-pdk-libs-sky130_fd_sc_lp/blob/e2c1e0646999163d35ea7b2521c3ec5c28633e63/cells/bushold0/sky130_fd_sc_lp__bushold0.v>

What is Linen?