#279 STD_CELL_LIBRARY cannot specify the library Issue opened by mguthaus Describe the bug If you set STD_CELL_LIBRARY, it is supposed to use that library. However, it will always use sky130_fd_sc_hd. To Reproduce Steps to reproduce the behavior: 1. export STD_CELL_LIBRARY="sky130_fd_sc_ls" 2. make pdk 3. make mount 4. echo $STD_CELL_LIBRARY 5. export STD_CELL_LIBRARY="sky130_fd_sc_ls" 6. ./flow.tcl -design spm Expected behavior It should create a design using sky130_fd_sc_ls, but instead it tries to use sky130_fd_sc_hd. Screenshots

ash-4.2$ ./flow.tcl -design spm  
[INFO]:  
___ ____ ___ ____ _ ____ ____ ___  
/ \ | \ / _]| \ | | / || \ / _]  
| || o ) [_ | _ || | | o || _ | / [_  
| O || _/ _]| | || |___ | || | || _]  
| || | | [_ | | || || _ || | || [_  
_*/ |*| |_**||*|*||_**||*|*||*|*||_____|

[INFO]: Version: v0.12-1-ga95f56d  
[INFO]: Running non-interactively  
[INFO]: Using design configuration at /openLANE_flow/designs/spm/config.tcl  
sky130_fd_sc_ls  
/openLANE_flow/configuration/checkers.tcl /openLANE_flow/configuration/routing.tcl /openLANE_flow/configuration/floorplan.tcl /openLANE_flow/configuration/synthesis.tcl /openLANE_flow/configuration/lvs.tcl /openLANE_flow/configuration/placement.tcl /openLANE_flow/configuration/general.tcl /openLANE_flow/configuration/cts.tcl  
sky130_fd_sc_hd  
[INFO]: Sourcing Configurations from /openLANE_flow/designs/spm/config.tcl  
[INFO]: PDKs root directory: /home/mrg/openlane/pdks  
[INFO]: PDK: sky130A  
[INFO]: Setting PDKPATH to /home/mrg/openlane/pdks/sky130A  
[INFO]: Standard Cell Library: sky130_fd_sc_hd  
[INFO]: Sourcing Configurations from /openLANE_flow/designs/spm/config.tcl  
[INFO]: Current run directory is /openLANE_flow/designs/spm/runs/05-04_18-31  
[INFO]: Preparing LEF Files  
[INFO]: Extracting the number of available metal layers from /home/mrg/openlane/pdks/sky130A/libs.ref/sky130_fd_sc_hd/techlef/sky130_fd_sc_hd.tlef  
[ERROR]: during executing: "python3 /openLANE_flow/scripts/extract_metal_layers.py -t /home/mrg/openlane/pdks/sky130A/libs.ref/sky130_fd_sc_hd/techlef/sky130_fd_sc_hd.tlef -o /openLANE_flow/designs/spm/runs/05-04_18-31/tmp/met_layers_list.txt"  
[ERROR]: Exit code: 1  
[ERROR]: Last 10 lines:  
Traceback (most recent call last):  
File "/openLANE_flow/scripts/extract_metal_layers.py", line 37, in  
with open(techlef_name, "r") as f:  
FileNotFoundError: [Errno 2] No such file or directory: '/home/mrg/openlane/pdks/sky130A/libs.ref/sky130_fd_sc_hd/techlef/sky130_fd_sc_hd.tlef'

Desktop (please complete the following information): • OS: Ubuntu 20.04 • Openlane Version 0.12-1-ga95f56d • open_pdks Version: b9ffc1fd1cfc26cbca85a61c287ac799721f6e6a • skywater-pdk Version: db2e06709dc3d876aa6b74a5f3893fa5f1bc2a6e efabless/openlane

I submitted a PR with the fix

@Matthew Guthaus I'm thinking that the STD_CELL_LIBRARY should be set in the config.tcl file for the design and not in the shell.

That would be a good place but it is also documented that the environment is supposed to work.

Ah, I didn't know that. Good thing to be aware of.