open-source-silicon.dev

Do I have to do something special to get a variable into `config_in.tcl`? Only some variables are getting copied over from `config.json`. For example, `STD_CELL_LIBRARY` and `PL_TARGET_DENSITY` get copied, but `VERILOG_FILES_BLACKBOX` and `EXTRA_GDS_FILES` never get filled in.

Ah, it actually seems like it's just a bug in the conversion script. If a string starts with `ref::$PDKPATH/` then the entire string becomes empty.

I'll file an issue on it.

Double-actually, I can't make it work. How can I use environment variables and/or the PDK path inside variables like `VERILOG_FILES_BLACKBOX`?

I ended up posting the issue at <https://github.com/The-OpenROAD-Project/OpenLane/issues/1616> -- something was causing the values to get silently deleted, and I'm still not sure what. Using `ref::$PDKPATH` works now that I've removed `/gf180mcuC` from the path, but it's still odd that most other paths don't work and there wasn't an error raised with the invalid path.