.. for github, vim: syntax=reStructuredText

=================================
Revision History and Change Log
=================================

The changes in each SiliconCompiler release version are described below. Commit
version shown in (). Where applicable, the contributors that suggested a given
feature are shown in [].

SiliconCompiler 0.31.1 (2025-03-06)
=========================================

**Minor:**

 * Fixed tcl manifest to correctly reflect the data types from the schema.
 * Added end of install status message to `sc-install`.


 * Tools:

  * vpr: updated to v9.0 and added timing metrics extraction.


SiliconCompiler 0.31.0 (2025-03-03)
=========================================

**Major:**

 * Updated schema to support further advanced packaging.


**Minor:**

 * Improved the generation of relay files to provide better insight when debugging.
 * Disabled the generation of the html report by default.
 * Fixed the handling of environmental variables to ensure they are all set at the start of the node execution.
 * Made schema fields pernode and scope enums for easier handling.


 * Tools:

  * openroad: added global routing metrics recording.
  * yosys: added support for loading slang and moosic plugins.


SiliconCompiler 0.30.0 (2025-02-18)
=========================================

**Major:**

 * Updated schema to support advanced packaging.


**Minor:**

 * Added additional feedback during `sc-install` if user paths are not configured.
 * Added support for generating screenshots and displaying `.dot` files.

 * Tools:

  * bluespec: fixed support for builtin modules.
  * openroad: added macro placement constraints script option via `['tool', 'openroad', 'task', 'macro_placement', 'file', 'rtlmp_constraints']`, automatic power grid blockage for pins via `['tool', 'openroad', 'task', 'power_grid', 'file', 'fixed_pin_keepout']`.


SiliconCompiler 0.29.4 (2025-02-06)
=========================================

**Minor:**

 * Added helper function to allow tasks to handle clock information in a uniform method.
 * Improved feedback on unsupported platforms during `sc-install`.


 * Tools:

  * bambu: updates to better handle platform and clock information.
  * openroad: added recover_power option support.
  * yosys: switch to use builtin `keep_hierarchy` to speedup compile times.


SiliconCompiler 0.29.3 (2025-01-28)
=========================================

**Major:**

 * Added color support to logger to allow for easier identification of warnings and errors.

**Minor:**

 * Corrected install scripts for surelog and bambu.
 * Fixed task setup order to avoid setting up tasks before the input nodes have been setup.

 * Tools:

  * slang: added elaboration task.
  * yosys: added controls for separator used during flattening via `['tool', 'yosys', 'task', 'syn_asic', 'var', 'hierarchy_separator']`.


SiliconCompiler 0.29.2 (2025-01-16)
=========================================

**Major:**

 * Added gtkwave show task to allow for vcd viewing.
 * Removed enablement for conda-eda as this is no longer a supported project.

**Minor:**

 * Allow passing a file path to `.register_source` to make it easier to handle retive path to the current file.

 * Tools:

  * openroad: added support for mutli-bit flipflop mapping and initial support for scan chain insertion, correct pin ordering from constraints.


SiliconCompiler 0.29.1 (2025-01-09)
=========================================

**Major:**

 * Added optional `optimizer` install extra to provide design optimization via google-vizier.

**Minor:**

 * Added capability to import flist files via `Chip.import_flist`
 * Added quiet loglevel to limit siliconcompiler logging to just the most critical information.

 * Tools:

  * openroad: switch to turn on new macro placer by default and correct handling of dont_use based on cell lists.
  * yosys: add detailed metrics for cell counts, added support for handling clockgate insertion, simplified library file handling, and updated lec task.
  * sta: added check_library task to help verify library setups for asic flows.


SiliconCompiler 0.29.0 (2024-12-12)
=========================================

**Major:**

 * Update asicflow and openroad driver to utilize smaller tasks. This is a breaking change from the previous implementation, but allows for better flow composability.
 * Added `['record', 'pythonversion']` and `['record', 'pythonpackage']` to schema to allow to better environment and provenance tracking.


**Minor:**

 * Reworked remote client into single class to allow for better job tracking locally.
 * Updated logic for printing package access information to avoid repeating information when possible during a run.

 * Tools:

  * openroad: rework tasks into smaller tasks, add access to `eliminate_dead_logic` via `['tool', 'openroad', 'task', 'init_floorplan', 'var', 'remove_dead_logic']`
  * yosys: fix fpga synthesis to allow for better macro extraction and added ability to map tri-state buffers to asic synthesis.


SiliconCompiler 0.28.9 (2024-11-27)
=========================================

**Minor:**

 * Added option to limit size of emailed logs based on number of lines.
 * Fixed handling of `find_files` in frontend tools
 * Removed automatic error when FPGA is not loaded, as this can be handled by the tool/task drivers.

 * Tools:

  * vivado: update tool and task drivers to handle v2024.x and cleaned up output filenames.


SiliconCompiler 0.28.8 (2024-11-20)
=========================================

**Minor:**

 * Fixed dashboard handling of graph metrics when job history contains different sets.

 * Tools:

  * openroad: added reporting of module cell areas.
  * vpr: added options to prevent crashing in designed with dangling ports.


SiliconCompiler 0.28.7 (2024-11-12)
=========================================

**Minor:**

 * Correct requirements to remove dashboard from python 3.9.7, due to issue in 3.9.7.


SiliconCompiler 0.28.6 (2024-11-12)
=========================================

**Minor:**

 * Added a support module to call for the manifest summary from `python3 -m siliconcompiler.apps.utils.summarize -cfg <file>`.
 * Removed dashboard from python 3.9.7, due to issue in 3.9.7.

 * Tools:

  * openroad: updated metrics task to allow for verilog inputs.


SiliconCompiler 0.28.5 (2024-11-06)
=========================================

**Major:**

 * Added interposer_demo target and interposerflow and drcflow.

**Minor:**

 * Added macroarea, padcellarea, and stdcellarea to metrics.
 * Added footprint to datasheet in schema.
 * Improved handling of `sc-show` and `sc-dashboard` when searching for manifests.

 * Tools:

  * openroad: added metrics task to collect metrics and an rdlroute task to perform floorplan initization and rdlrouting.
  * klayout: fixed handling of fill during GDS generation.


SiliconCompiler 0.28.4 (2024-10-28)
=========================================

**Major:**

 * Added testing support for Python 3.13.


**Minor:**

 * Added support to allow dashboard to auto select an open port if not specified.

 * Tools:

  * openroad: updated minimum version to support database markers and added support to save clock routing.
  * surelog: ensure its require list is complete to properly detect changes in inputs.
  * yosys: added screenshot task.
  * klayout: added drc task to run DRC and convert_drc_db task to convert a klayout DRC database to openroads.
  * vpr: added `vpr_device_code` support. 
  * magic: added support for uncompressing LEF files.


SiliconCompiler 0.28.3 (2024-10-14)
=========================================

**Major:**

 * Added `sc-install` utility application to help install tools on supported platforms.


**Minor:**

 * Added rhel8 and rhel9 install scripts.
 * Fixed bug in `sc-install` to account for different operating systems support.
 * Ensure generated files `.errors` and `.warnings` are included in the metrics files.

 * Tools:

  * openroad: added options to control optimization (`remove_synth_buffers`, `rsz_skip_setup_repair`, and `rsz_skip_hold_repair`).
  * xdm: added install script.



SiliconCompiler 0.28.2 (2024-10-02)
=========================================

**Major:**

 * Added `sc-install` utility application to help install tools on supported platforms.


**Minor:**

 * Updated `.input/.output` to support receiving lists of files.


SiliconCompiler 0.28.1 (2024-09-20)
=========================================

**Major:**

 * Updated lambdapdk to add support for ihp130 and added demo target.


**Minor:**

 * Tools:

  * openroad: fix rotation handling in floorplanning.
  * xyce: updated tool driver implementation.
  * xdm: added xyce netlist conversion tool.
  * openfpgaloader: removed non-functional implementation of openfpgaloader driver.


SiliconCompiler 0.28.0 (2024-09-18)
=========================================

**Major:**

 * Updated schema constraints to remove the use of the z-axis.
 * Added schematic information to the schema.
 * Changed component placement constraints to reference the lower left corner of the instance instead of the center.


**Minor:**

 * Tools:

  * openroad: updated to account for new placement and rotation constraints.


SiliconCompiler 0.27.1 (2024-08-28)
=========================================

**Minor:**

 * Fix path handling from commandline.


SiliconCompiler 0.27.0 (2024-08-28)
=========================================

**Major:**

 * Deprecated `.load_target()` in favor of `.use()`.
 * Added a `-use` option to the `sc` cli app to allow for loading of modules.
 * Removed the chip input from libraries, pdks, fpga, etc to simplify setup.


SiliconCompiler 0.26.5 (2024-08-26)
=========================================

**Major:**

 * Moved surelog distribution to a separate package, making SiliconCompiler a pure python distribution.

**Minor:**

 * Fixed handling of files and directories from the commandline interface.


SiliconCompiler 0.26.4 (2024-08-22)
=========================================

**Minor:**

 * Limit schema sections getting imported from libraries to speed up importing.
 * Added verilator tool option to dvflow.
 * General speedup improvements to schema object.
 * Added `find_node_file` helper function to make accessing files in the node run directory as easy as possible.


SiliconCompiler 0.26.3 (2024-08-20)
=========================================

**Major:**

 * Removed `-generate` from `sc-issue` when creating a sharable testcase.
 * Allow for recursive definitions of asic logic and macro libs from imported libraries.

**Minor:**

 * `smake` improved handling of boolean arguments and arguments with default values.
 * Corrected `.swap_library` to correctly swap libraries.


SiliconCompiler 0.26.2 (2024-08-15)
=========================================

**Minor:**

 * Added portname to pins in schema.
 * Allow `.swap_library` to swap to `None` when removing a soft-library.

 * Tools:

  * openroad: fixed max density error to 100% and allow for multiple padring files to be loaded instead of just one.


SiliconCompiler 0.26.1 (2024-08-02)
=========================================

**Major:**

 * Added `smake` commandline tool to enable a Makefile like interface to `make.py` files.
 * Removed the need to have local execution for remote jobs.

**Minor:**

 * Added additional helper functionality to `Library`, `PDK`, and `FPGA` to better handle package registration.


SiliconCompiler 0.26.0 (2024-07-30)
=========================================

**Major:**

 * Removed ['option', 'copyall'] from schema.
 * Updated ['option', 'loglevel'] to be lower case settings.
 * Added ['record', 'toolexitcode] to track the tool exit code during execution.
 * Added whitelist of directories to `sc-remote` to avoid uploaded directories not approved by the user.
 * Add support to automatically add soft IP libraries to ['option', 'library'] if specified by the library developer.


SiliconCompiler 0.25.0 (2024-07-26)
=========================================

**Major:**

 * Removed ['option', 'mode'] and ['option', 'frontend'] from schema.
 * Moved flowgraph runtime information into ['record', ...].
 * Implemented a dynamic flowgraph that is capable to skipping nodes that are not needed, for example in the case that a design contains VHDL and not verilog, the verilog preprocessing is skipped.
 * Split ['input', 'rtl', 'verilog'] into  ['input', 'rtl', 'systemverilog'] and  ['input', 'rtl', 'verilog'] to be better able to tell the file types apart.
 * Added support for remote jobs to be marked as rejected.


**Minor:**

 * Fixed issue generation for python only tasks.
 * Added memory usage collection to python only tasks.
 * Prevent `Chip.collect()` from collecting the user home directory and current build directory.

 * Tools:

  * slang: added warning and error metrics collection.


SiliconCompiler 0.24.1 (2024-07-11)
=========================================

**Major:**

 * Added slang tool with a lint task.

**Minor:**

 * Corrected reading of previous run manifests to avoid loading manifests of nodes while will need to be rerun.


SiliconCompiler 0.24.0 (2024-07-09)
=========================================

**Major:**

 * Overhaul of Chip and Schema python APIs.

  * Major Chip function changes: renamed `register_package_source` -> `register_source` and `_getworkdir` -> `getworkdir`.
  * Major Schema function changes: renamed `_has_field` -> `has_field`, `_remove` -> `remove`, and `_is_empty` -> `is_empty`.

 * Overhaul of Schema keys to clean unused keys and keys with overlapping purposes, major changes:

  * Added metrics: drcs, setupskew, holdskew, and inverters.
  * Removed the unit section of the Schema.
  * Renamed ['option', 'cache'] -> ['option', 'cachedir'].
  * Merged behavior of ['option', 'flowcontinue'] and ['option', 'continue'] into ['option', 'continue'].
  * Removed ['option', 'relax'], ['option', 'trace'], ['option', 'skipall'], and ['option', 'skipchecks'].

 * Add ability for job scheduler to send status update emails via ['option', 'scheduler', 'msgcontact'] and ['option', 'scheduler', 'msgevent'].
 * Make resume the default behavior for runs, when a new run is needed ['option', 'clean'] can be set to True to delete the old run and start fresh.
 * Add capability to copy an old run and resume from a specific node, allowing users to preserve the original run while avoiding rerunning previous steps.

**Minor:**

 * Add option to `write_flowgraph` to add file annotations to graphs.


SiliconCompiler 0.23.4 (2024-07-02)
=========================================

**Major:**

 * Add support for docker based running through the use of the ['option', 'scheduler', 'name'] = 'docker'.

**Minor:**

 * Ensure that exceptions are printed to log when they occur during runs.
 * Added timestamp checking to resume checks when file hashes are not available.
 * Implemented totaltime metric to track the total execution time of a run.


SiliconCompiler 0.23.3 (2024-06-25)
=========================================

**Minor:**

 * Expended daily CI testing to include all examples.
 * Cleaned up python requirements to remove unused ones.
 * Added `verbose` and `require_reports` flags to `check_checklists` to allow for better control of checklist checking.


SiliconCompiler 0.23.2 (2024-06-20)
=========================================

**Minor:**

 * Limit logging while generating testcases during run.
 * Move sc-leflib to test requirements


SiliconCompiler 0.23.1 (2024-06-18)
=========================================

**Major:**
 * Fixed accounting for resources in scheduler.
 * Removed limitation that prevents slurm from being the first node in the execution graph.
 * Added capability to generate standalone testcases on failures to make issue reporting easier.

**Minor:**

 * Print stacktraces in logger to allow for better tracking of errors.

* Tools:

  * opensta: fixed thread handling in tool driver and added a library reporting task to collect information about timing libraries.
  * openroad: correct image collecting to avoid generating IR drop on every task.
  * slurm: provide clear error message when slurm is not installed.
  * surelog: correct top module handling in systemverilog mode.


SiliconCompiler 0.23.0 (2024-06-13)
=========================================

**Major:**
 * Added support to hash directories.
 * Ensure that resume removes stale data in following nodes during run.
 * Run provides warning if system is running out of memory.
 * Local scheduler updated to prevent executing parallel nodes which exceed the resources available, also controllable via ['option', 'scheduler', 'maxnodes'].
 * Added support for nodes to receive the same file from multiple inputs.
 * Added support to detect changes to the input files and node settings during resume and rerun those nodes.
 * Added support for mixed-frontends.

**Minor:**

 * Ensure that global values can be access and modified in strict mode.
 * Added build scripts to tools for ubuntu 24.04.
 * Added synflow which runs yosys synthesis and opensta timing.
 * In strict mode, only files declared by a task driver will be copied into the inputs directory.
 * In the event of a tool failure the node will run to completion before erroring out to allow for additional data gathering.
 * Renamed export step in asicflow to ensure proper graph handling.

* Tools:

  * opensta: added a standalone tool with timing task.
  * openroad: ensure the SDC file is correctly copied in when screenshot task is part of a flowgraph.


SiliconCompiler 0.22.0 (2024-05-23)
=========================================

**Major:**
 * Added support to handle casting to strings in the schema when setting a string key.
 * Added initial support to allow for type changing in the schema via `Schema._change_type`.
 * Corrected tool module searching to correctly allow for tool modules to be in `__init__.py`
 * Increased the default densities of all asic targets to 40%.

**Minor:**

* Tools:

  * openroad: added additional support to control what is written out in the export task.
  * verilator: ensure if the user defines the `VERILATOR` parameter, the tool driver filters it out as as generates an error otherwise.


SiliconCompiler 0.21.13 (2024-05-15)
=========================================

**Minor:**

* Tools:

  * openroad: fixed run issues related to placement density selection and missing DRV reporting.


SiliconCompiler 0.21.12 (2024-05-13)
=========================================

**Minor:**

* Search for summary image by walking backwards through the executed nodes.
* Sped up schema loading and merging by avoiding unneeded deepcopies.
* Added support to set a list in the schema with a 'set()'

* Tools:

  * ghdl: added support for ['option', 'define'].
  * yosys: added kogge-stone operator mapping to asic flow, removed library merging hack which is no longer needed.
  * openroad: added better support for selecting global placement density, added support to control metrics and reports in tasks via ['tool', 'openroad', 'task', <task>, 'var', 'reports'].
  * netgen: filter errors in stderr to ensure "Note:" are not interpreted as an error.
  * klayout: allow tool to handle fill importing natively from DEF.


SiliconCompiler 0.21.11 (2024-04-26)
=========================================

**Minor:**

* Added helper functions to tcl to make accessing schema information easier.
* Added helper functions to allow tools to have consistent behavior around picking from pdk/library/option variables during setup.
* Ensure the remote client downloads the final results from the remote to get any logs and error messages.

* Tools:

  * openroad: fixed default routing via settings.
  * klayout: made hide_layer variable more consistent with klayouts layer information, and added support for .gz file handling in show and screenshotting tasks.


SiliconCompiler 0.21.10 (2024-04-22)
=========================================

**Minor:**

* Switch to use templates for generating tool files instead of python print statements to make it easier to maintain.
* Added logic depth to schema metrics.

* Tools:

  * yosys: added support for handling hierarchy selection with globbing, added better handling of library merging to ensure liberty templates are properly copied in.
  * openroad: added support for extracting logic depth of the design and added irdrop extraction to tool driver.


SiliconCompiler 0.21.9 (2024-04-12)
=========================================

**Minor:**

* General cleanup of documentation building.

* Tools:

  * yosys: added support for specifying blackbox models via ['tool', 'yosys', 'task', 'syn_asic', 'var', 'blackbox_modules']


SiliconCompiler 0.21.8 (2024-04-11)
=========================================

**Minor:**

* Fixed packaging extraction when downloading from github.
* Fixed remote run file retrieval to avoid errors when extracting and moving files.

* Tools:

  * vpr: added support for show and screenshoting tasks.


SiliconCompiler 0.21.7 (2024-04-02)
=========================================

**Minor:**

* Update remote code to honor constraints transmitted by the remote runner.
* Add fall back to package locking when file system locking is not available.
* Fixed handling of github artifact packages.
* Added build scripts for ubuntu22.

* Tools:

  * vpr: add reporting images to tool driver, these can be disabled via ['tool', 'vpr', 'task', 'place' or 'route', 'var', 'enable_images'] = 'false'.


SiliconCompiler 0.21.6 (2024-03-28)
=========================================

**Minor:**

* Fixed handling of files with codec errors.
* Update package lock file handling to avoid race conditions in parallel flows.

* Tools:

  * yosys: minor code cleanup in FPGA flow.
  * vpr: add support for clock routing.
  * surelog: added wrapper comments in output file for parsing to indicate where segments of code came from.


SiliconCompiler 0.21.5 (2024-03-21)
=========================================

**Minor:**

* Added a github data source to handle data from private repositories.

* Tools:

  * vpr: added pin metrics collection for FPGA flows.


SiliconCompiler 0.21.4 (2024-03-15)
=========================================

**Minor:**

* Added keys to schema to track FPGA resources.

* Tools:

  * yosys: add metrics collection for FPGA flows.
  * vpr: added metrics collection for FPGA flows.


SiliconCompiler 0.21.3 (2024-03-13)
=========================================

**Minor:**

* Tools:

  * openroad: fixed handling of pin constraints
  * yosys: updated to take advantange of native dont_use interfaces


SiliconCompiler 0.21.2 (2024-03-08)
=========================================

**Minor:**

* Fix importing of package data from non libraries
* Fix unlocking behavior in schema keys


SiliconCompiler 0.21.1 (2024-03-07)
=========================================

**Minor:**

* Fix handling of python module packages on older versions of python.


SiliconCompiler 0.21.0 (2024-03-07)
=========================================

**Major:**

* Added support for handling soft libraries in the schema via ['option', 'library'] and updated all frontend task drivers to support these.

**Minor:**

* Ensure that libraries, which import a library, are handled correctly.


SiliconCompiler 0.20.3 (2024-03-06)
=========================================

**Minor:**

* Added testing to ensure command line arguments are all checked for functionality and follow the schema pattern.
* Fixed python package lookup when the installed package does not match the name of the distribution.
* Added print controls to command line applications to allow custom arguments to be displayed along with schema values via the key `sc_print:`.
* Updated the conda environment and added testing to ensure functionality.


SiliconCompiler 0.20.2 (2024-02-20)
=========================================

**Minor:**

* Fixed some issued identified by tclint.
* Added helper function to better detect locally installed and editable python packages for package registration.


SiliconCompiler 0.20.1 (2024-02-12)
=========================================

**Major:**

* Moved from hosting third party pdks in SiliconCompiler to fully using lamdapdk.
* Added a demonstration target for gf180.

**Minor:**

* Tools:

  * vpr: added support for pin constraints.
  * openroad: added estimated routing congestion to the task image writing and updated fmax metric collection to use OpenROAD directly.


SiliconCompiler 0.20.0 (2024-02-01)
=========================================

**Major:**

* Update file path hashing to include package information.

**Minor:**

* Tools:

  * yosys: update FPGA synthesis to better map LUTs and memories.
  * openroad: added option to control CTS with obstruction awareness via  via ['tool', 'openroad', 'task', 'cts', 'var', 'cts_obstruction_aware'].
  * klayout: added operation to be able to rename cells in layout via ['tool', 'klayout', 'task', 'operations', 'var', 'operations', 'rename_cell'].


SiliconCompiler 0.19.1 (2024-01-24)
=========================================

**Major:**

* Tools:

  * yosys: updated implementation for FPGA flow to better support flip-flop mapping and hard macro extraction and mapping.

**Minor:**

* Package downloading to ensure GitHub release artifacts can be downloaded from private repositories.


SiliconCompiler 0.19.0 (2024-01-05)
=========================================

**Major:**

* Expanded and clarified the datasheet category of the schema.


SiliconCompiler 0.18.2 (2023-12-18)
=========================================

**Minor:**

* Fixed resolving paths in package sources when paths contain environmental variables.


SiliconCompiler 0.18.1 (2023-12-13)
=========================================

**Minor:**

* Fixed importing of libraries to collect package sources during import.

* Tools:

  * klayout: fixed loading of schema in the presence of other modules named schema.


SiliconCompiler 0.18.0 (2023-12-04)
=========================================

**Major:**

* Added ['option', 'cache'] keypath to control the location of the cached data.
* Added support for Python 3.12


SiliconCompiler 0.17.0 (2023-11-16)
=========================================

**Major:**

* Added ['package', 'source', '<name>', 'path'] and ['package', 'source', '<name>', 'ref'] to support directly downloading of required data for a design, pdk, library, etc.

* Removed support for $SCPATH and ['option', 'scpath'] in favor of using package sources.

**Minor:**

* Tools:

  * yosys: fixed handling of blackboxes during verilog reading, improved the sdc parsing to better estimate the clock for yosys-abc

  * OpenROAD: fixed PDN file handling to only read files once to avoid errors from redefining the same grids.


SiliconCompiler 0.16.3 (2023-11-02)
=========================================

**Minor:**

* Removed unused ['flowgraph', '<graph>', '<step>', '<index>', 'valid'] field from schema.

* Tools:

  * klayout: fixed DEF to GDS generation by ensuring the correct units are used during DEF read in and fixes the stream writing to honor OASIS if requested.

  * OpenROAD: fixed handling of unidirectional layers in routing task and added tasks to support generating OpenRCX parasitic extraction decks.


SiliconCompiler 0.16.2 (2023-10-13)
=========================================

**Minor:**

* Added line numbers to the error and warning log files to aid in tracking down the message in the main log.


SiliconCompiler 0.16.1 (2023-10-11)
=========================================

**Minor:**

* Fixed incorrect settings when submitting remote jobs.


SiliconCompiler 0.16.0 (2023-10-09)
=========================================

**Major:**

* Deprecated support for Python 3.6 and 3.7.

* Added ['option', 'from'], ['option', 'to'], and ['option', 'prune'] to better control the execution of the flowgraph.

* Removed leflib from SilconCompiler and use the standalone implementation provided via `pip install sc-leflib`.

**Minor:**

* Moved the built in server to use the Schema class for handling its settings.

* Fixed handling of Windows paths when submitting jobs from a Windows machine to a linux runner.

* Corrected the return behavior from the schema `.get()` to ensure lists are copied instead of being returned by reference.

* Fixed behavior where `sc-show` would require both step and index to be specified and allowed for directories to be specified as the show target.

* Tools:

  * yosys: Updated to support new ABC interface for passing along dont_use cells.

  * verilator: added support for assertions via ['tool', 'verilator', 'task', 'compile'/'lint', 'var', 'enable_assert']


SiliconCompiler 0.15.4 (2023-09-25)
=========================================

**Minor:**

* Added `-design` to `sc-dashboard` and ensured common behavior between `sc-show` and `sc-dashboard`.

* Disabled sorting of keys in writing of the json schema to preserve the order in the original dictionary.

* Added an alias (`siliconcompiler`) to the commandline application `sc` to allow Windows users to be better able to use SiliconCompiler.

* Tools:

  * surelog: Ensure the bundled version is built using a static zlib library for Windows distribution.

  * OpenROAD: Added more controls over the heatmap image generation and to only write heatmaps with data available.


SiliconCompiler 0.15.3 (2023-09-21)
=========================================

**Minor:**

* Fixes to `sc-show` for viewing remote files to ensure it does not attempt to use the file paths from the remote, but instead the local file paths.

* Tools:

  * klayout: Use build technology files and layer display files in show and ensure these are placed into the outputs directory when exporting to a GDS.


SiliconCompiler 0.15.2 (2023-09-18)
=========================================

**Minor:**

* Fixes minor bug in the dashboard which prevented the launching the dashboard.

* Ensures all tool output goes through the logger.

* Improved implementation of `.valid()` to provide faster checking.

* Tools:

  * OpenROAD: fixed bugs in instance creation and pin access function calls. Implemented support for multiple library corners assigned to a single scenario in timing constraints.
  * yosys: Implemented support for multiple library corners assigned to a single scenario in timing constraints.


SiliconCompiler 0.15.1 (2023-09-08)
=========================================

**Major:**

* Merged `sc-configure` into `sc-remote` to unify the remote interface

**Minor:**

* Fixed missing information in documentation build for flowgraphs.

* Removed call to `delete_job` on remote jobs, relying on remote to handle cleanup instead.

* Refactored core run functions for better code management.


SiliconCompiler 0.15.0 (2023-08-31)
=========================================

**Major:**

* Updated schema to remove unused ['option', 'skipstep'] key and add record to store the remote job id in ['record', 'remoteid'].

**Minor:**

* Added additional error checking and file cleanup to remote run to ensure empty files are not left behind.

* Fixed handling of setting list of tuples in the schema to corrected parse the values.

* Tools:

  * OpenROAD - disabled timing optimizations by default, added support for generating report images in the screenshot task via ['tool', 'openroad', 'task', 'screenshot', 'var', 'include_report_images'].
  * Chisel - added support for handling `build.sbt` via the input fileset ['input', 'config', 'chisel'].


SiliconCompiler 0.14.0 (2023-08-21)
=========================================

**Major:**

* Reworked FPGA to allow for better handling of FPGA parameters in the schema.
* Added missing mechanical parameters to the schema and updating the signal interface naming for clarity.
* Stop execution upon node failures, instead of continuing with repeated failures.

**Minor:**

* Ensure ['option', 'nodisplay'] is set when the environment does not support graphics.

* Added error checking for ['option', 'steplist'] to match current flowgraph.

* Removed physyn step from asicflow.

* Fixed issue when running remote and the submitted files are not updated.

* Tools:

  * OpenROAD - update default value for [..., 'var', 'grt_macro_extension'] to '0' to allow for better routing.
  * verilator - reworked options selection to allow for better control of user selected tool options.
  * yosys - added support for blackboxes in libraries via ['library', \<lib\>, 'output', 'blackbox', 'verilog'].


SiliconCompiler 0.13.2 (2023-08-10)
=========================================

**Major:**

* Added graphs view to dashboard for comparing metrics across runs.

* Added ``sc-remote`` app for checking server status and interacting with running remote jobs (replaces ``sc-ping``).

**Minor:**

* Added checkbox to dashboard for enabling "raw" view of manifest.

* Tools:

  * OpenROAD - made repair_design more verbose (requires updated version), added option to generate design images at end of task via ['tool', 'openroad', 'task', \<task\>, 'var', 'ord_enable_images'], tweaked pin placement behavior, added SDF file output to export task.
  * surelog - fixed driver to sanitize escape characters in Verilog output, added option to disable write cache via ['tool', 'surelog', 'task', 'parse', 'var', 'disable_write_cache'].
  * klayout - added option to allow missing cells in stream files via ['library', \<lib\>, 'option', 'var', 'klayout_allow_missing_cell'], added option to set DB units via ['pdk', \<pdk\>, 'var', 'klayout', 'units', \<stackup\>].


SiliconCompiler 0.13.1 (2023-07-21)
=========================================

**Minor:**

* Improved remote run reliability, including graceful time-outs when server not responding and thread-safety fixes.

* Added ['option', 'libext'] support for Surelog, Verilator, and Icarus.

* Removed dashboard support for Python 3.6.

* Made aesthetic tweaks to dashboard.

* Fixed bundled Surelog on pre-macOS 12.

* Tools:

  * yosys - fixed synthesis strategies.
  * verilator - added multithreading, added FST trace format support.
  * OpenROAD - bumped minimum version to better support IR drop analysis, added additional controls for abstract LEF generation, updated scripts to improve `ORFS <https://github.com/The-OpenROAD-Project/OpenROAD-flow-scripts>`_ correspondence, fixed to use correct layers for parasitic estimation.


SiliconCompiler 0.13.0 (2023-07-07)
=========================================

**Major:**

* Added dashboard to SiliconCompiler to allow better inspection of the run information and added `sc-dashboard` app to open and display the dashboard.

**Minor:**

* Added ['input', 'constraint', 'upf'] as a recognized format

* Tools:

  * surelog - added support for lowmem option via ['tool', 'surelog', 'task', 'parse', 'var', 'enable_lowmem']


SiliconCompiler 0.12.3 (2023-06-23)
=========================================

**Major:**

* Added new flow ``screenshotflow`` to enable generating high quality stream images via klayout and imagemagick/montage.
* Added new tool ``execute`` to enable executing the output of a previous task, such as in the case of compiling a binary in one step and executing it in the next.

**Minor:**

* ``sc-show`` fixed error handling when attempting to how a file without a manifest.
* Added support for `pathlib.Path` objects when setting file and dir type parameters in the manifest.

* Tools:

  * yosys - fixed marking liberty files dont_use and ensure each library is merged together for ABC. Updated driver to use lower case true/false for ['tool', 'openroad', 'task', '*', 'var'] to be consistent with other tools.
  * verilator - added support for pins-bv via ['tool', 'verilator', 'task', 'compile', 'var', 'pins_bv'] and compile modes via ['tool', 'verilator', 'task', 'compile', 'var', 'mode'].


SiliconCompiler 0.12.2 (2023-06-14)
=========================================

**Major:**

* Added additional arguments to ``sc-show`` to provide access to specific steps and indices in the run.

**Minor:**

* Tools:

  * OpenROAD - added generation of separate timing and power reports in the reports/ directory to provide better insights into the design, added additional parameters to timing repair to enable minimizing total negative slack ['tool', 'openroad', 'task', 'place', 'var', 'rsz_repair_tns'], and added support for RTL-MP for macro placement.
  * yosys - added initial support for hierarchical synthesis via ['tool', 'yosys', 'task', 'syn_asic', 'var', 'hier_threshold'], this is disabled by default while it is still in development.


SiliconCompiler 0.12.1 (2023-06-07)
=========================================

**Major:**

* Fixed writing of manifest to preserve values that were previously removed incorrectly.
* Updated recording of ['record', ...] to track tool versions, tool options, task start and end times, and SiliconCompiler version, while preserving control of sensitive records like ['record', 'ipaddr'] with ['option', 'track'].

**Minor:**

* Fixed handling of ``sc-issue`` to avoid clobbering the user set options and only bundle the required files for a testcase to minimize the size of the file.
* Added error checking for ``create_cmdline`` to check for invalid arguments.
* Tools:

  * OpenROAD - added support for disallowing one site gaps in detail placement ['tool', 'openroad', 'task', 'place', 'var', 'dpl_disallow_one_site']. Added support for ['option', 'warningoff']
  * surelog - Added support for ['option', 'warningoff']
  * Verilator - Added support for ['option', 'warningoff']


SiliconCompiler 0.12.0 (2023-05-24)
=========================================

**Major:**

* Added/updated parameters in ['datasheet'] section of the schema to allow for better capturing of design datasheet.
* Updated Verilator tool driver to support CFLAGS/LDFLAGS and fix linting task.
* Added operations task to klayout to allow for unit operations on GDSs like merging, adding outlines, rotating, etc.
* Added options to ``archive()`` to support archiving multiple jobs and filtering files to include.

**Minor:**

* Added enforcement of ['option', 'mode'] to ensure it is set for better manifest checking.
* Added per-pin voltage constraints for better support of multiple power/voltage domains, ['constraint', 'timing', scenario, 'voltage', pin].
* Fixed tool drivers to ensure proper use of ``find_files()`` is not done in ``setup()``.
* Added check for permissions error while collecting child process memory statistics.


SiliconCompiler 0.11.2 (2023-05-15)
=========================================

**Major:**

* Updated ``sc-issue`` to generate self-contained testcases to allow for better sharing of testcases.
* Updated klayout tool driver to support map-file option for DEF-GDS export step, and remove need for hard coded options in ``.lyt`` file in favor of getting values from the schema.

**Minor:**

* Updated loading order to target in commandline interface to ensure schema parameers are set before loading target.
* Error checking for flowgraphs with duplicated edges.
* Added ``-ext`` to ``sc-show`` command to control what file is opened when multiple files are available.
* Tools:

  * OpenROAD - added flags to control antenna repairs: ['tool', 'openroad', 'task', 'route', 'var', 'ant_check'] and ['tool', 'openroad', 'task', 'route', 'var', 'ant_repair']; added clock buffer selection option from the library with ['library', lib, 'option', 'openroad_cts_clock_buffer']


SiliconCompiler 0.11.1 (2023-05-03)
=========================================

**Major:**

* Revamped documentation for better readability and navigability.

**Minor:**

* Fixed handling when loading schemas from JSON to ensure values are normalized correctly.
* When a tool fails, the last 10 lines of the log is printed when ['option', 'quiet'] is set to aid in debugging.
* Updated server/client to use python tarfile module instead of spawning subprocesses.
* Implemented python linting.
* Tools:

  * OpenROAD - implemented snapping to sites or manufacturing grid for component placement via ['tool', 'openroad', 'task', 'floorplan', 'var', 'ifp_snap_strategy'] and
    added ability to select SDC IO buffer for automatic constraint generation via ['tool', 'openroad', 'task', 'floorplan', 'var', 'sdc_buffer'].
  * yosys - fixed invalid keypath access when logiclib is incorrectly specified.


SiliconCompiler 0.11.0 (2023-04-17)
=========================================

**Major:**

* ``sc-issue`` added as command line application to support sharing runnable testcases.
* Removed the requirement that the initial task of the flowgraph be called 'import' and the final task be called 'export'.
* Fully implemented ``.node()`` to take in a task module, simplifying the construction of a flowgraph and removing its dependence on ['option', 'scpath'].

**Minor:**

* ['tool', tool, version, 'sbom'] added to be able to track a tools `SBOM <https://en.wikipedia.org/wiki/Software_supply_chain>`_.
* ``.hash_files()`` updated to honor the 'hash' field for the file parameters.
* ``.calc_yield()``, ``.calc_area()``, ``.calc_dpw()`` updated to new schema parameters.

SiliconCompiler 0.10.2 (2023-04-04)
=========================================

**Major:**

* Support for Python 3.11
* Building arm64 wheels for surelog

**Minor:**

* Tools:

  * general - deployed docker based CI with automatic tool building and testing
  * klayout - support for OAS stream files via ['tool', 'klayout', 'task', 'export', 'var', 'stream'] = 'oas', better detection of missing layout cells
  * yosys - support for controlling buffer insertion via ['tool', 'yosys', 'task', 'syn_asic', 'var', 'add_buffers'] = 'True'/'False'
  * openroad - correct handling of INF timing in metrics
* Improve memory recording to account for child processes
* General documentation cleanup

SiliconCompiler 0.10.1 (2023-03-11)
=========================================

**Major:**

* Adding ``._record_metric()`` for tool drivers to use when recording metrics to ensure they honor the schema units and record the source of the metric at the same time.

**Minor:**

* Improved error handling and messaging for remote jobs.
* Fixed HTML summary report and PNG summary image not getting rebuilt when calling ``.summary()``
* Updated ``.summary()`` table to display units and format numbers accordingly.

SiliconCompiler 0.10.0 (2023-03-08)
=========================================

**Major:**

* Schema overhauled (see `schema documentation <https://docs.siliconcompiler.com/en/stable/reference_manual/schema.html>`_ for details):

  * Added ability to override certain schema parameters on a per-step/index basis.
  * Added step and index to schema access methods.
  * Expanded constraints category to include component and pin placement.
  * Cleaned up parameters which were duplicated in other categories.
  * Implemented ['input', ...] and ['output', ...] filesets along with ``.input()`` and ``.output()`` helper functions
* Added tasks to tools prevent step name from getting used for task identification.
* Implemented ``.use()`` in favor of ``.load_pdk()``, ``.load_flow()``, etc. to take in Python modules instead of strings.
* Changed libraries, flows, checklists, and pdks to explicitly return a particular class object.
* Generate a summary PNG.
* Removed Floorplanning API.
* Added support for custom macros and scripts in the remote workflow.

**Minor:**

* Updated OpenROAD scripts to support a hierarchical flow.
* Updated Yosys scripts to better support hierarchy.
* Improved auto documentation generation.
* Updated pdk and library settings to provide additional corners where available.
* Updated documentation, including Installation, Quickstart Guide and Tutorials.
* Added Fmax as a first-order metric to the Schema

SiliconCompiler 0.9.6 (2022-10-03)
=========================================

**Major:**

* Fixed bug that causes tool setup information to be lost when running a flow in multiple chunks using a steplist.

**Minor:**

* Fixed old schema references in Yosys synthesis strategy scripts.
* Updated error message for missing file requirements.
* Updated OpenROAD scripts to handle multiple LEF files.
* Updated KLayout driver to use batch mode flag and capture more warnings.
* Updated Verilator driver to implement ['option', 'trace], ['option', 'warningoff'], and provide passthroughs for CFLAGS and LDFLAGS.
* Removed support for 'extraopts' passthrough in Verilator driver.
* Updated version of Surelog bundled with wheels distribution.

SiliconCompiler 0.9.5 (2022-09-12)
=========================================

**Minor:**

* Schema: Added ['tool', <tool>, 'prescript'/'postscript', <step>, <index>] to support user-supplied pre- and post-scripts for script-based tools.
* Schema: Added ['tool', <tool>, 'file', <step>, <index>] passthrough parameter.
* Added runtime logic to terminate tools that do not exit on their own after a job is interrupted with ctrl-c.
* Fixed KLayout show bugs.
* Fixed issue building SC in editable mode using newer versions of Pip/setuptools.

SiliconCompiler 0.9.4 (2022-08-25)
=========================================

**Major:**

* Changed ``run()`` logic to not reset metrics to zero.

  * ``summary()`` will only display metrics that have been explicitly set.

**Minor:**

* Schema: Changed ['constraint', <scenario>, 'libcorner'] from scalar to list.
* Added support for --latches option in GHDL driver.
* Added ``:keypath:`` directive to distributed Sphinx extensions.
* Added reports and final manifest to ``archive()`` outputs.
* Fixed bug where ``job`` argument to ``find_files()`` was not handled properly.
* Fixed pin sizes and PDN vias in Caravel wrapper example.
* Updated flow scripts to support newer version of OpenROAD.
* Updated version of Surelog bundled with wheels distribution.

SiliconCompiler 0.9.3 (2022-08-01)
=========================================

**Major:**

* Added basic editing functionality for signoff checklists in HTML report.
* Changed file collection behavior:

  * For local runs, inputs are not copied into import/ at all.
  * For remote runs, inputs are copied into import/0/inputs/ only, not outputs/.
* Implemented ['option', 'entrypoint'], allowing users to specify an alternative top-level.
* Implemented support for "pure Python" tools.

  * A ``run()`` method inside a tool setup file will be run instead of an executable.

**Minor:**

* Changed ``run()`` behavior to read metrics from all leaf tasks.
* Fixed implementation of ['option', 'jobincr'].
* Fixed bug causing exception on ``summary()`` for machines with a default encoding other than UTF-8.
* Fixed logfile reading logic to gracefully handle invalid characters.
* Improved error messages for some common issues.

SiliconCompiler 0.9.2 (2022-07-08)
=========================================

**Major:**

* Schema: Added ['option', 'flowcontinue'] to control whether flow continues when a tool reports errors.

  * This used to be controlled by ['tool', \<tool\>, 'continue'], but this parameter is meant to feed directly into tools (rather than controlling the SC runtime).
* Schema: Added ['option', 'continue'] parameter to control whether errors in the Python API are fatal.

  * The default value makes errors fatal, setting this parameter to True reverts to the old behavior.
* Added VPR-based FPGA bitstream generation flow.
* Added logic to set errors and warnings metrics based on ['tool', \<tool\>, 'regex', ...] matches. This reduces tool driver boilerplate and makes the metrics consistent with the generated regex match files.

**Minor:**

* Changed default technology target for ``sc`` app.
* Changed KLayout show script to always use a dark background.
* Changed ``check_manifest()`` to allow tool tasks to have multiple inputs (behaving as if they were merged with a "join" builtin).
* Changed ``check_manifest()`` to return True on success rather than 0 (the previous behavior didn't match the documentation).
* Changed Yosys and OpenROAD tool drivers to make them easier to use in flows with alternate step names.
* Changed GHDL tool driver to allow additional CLI options via ['tool', \<tool\>, 'var', ..., 'extraopts'].
* Removed return codes from ``post_process()``.

SiliconCompiler 0.9.1 (2022-06-21)
=========================================

**Major:**

* Added input filetype inference based on file extension (restores functionality lost in 0.9.0).
* Added manifest tree viewer to HTML report.
* Added simulator exe compilation support to Verilator.
* Improved TCL manifest generation:

  * Fixed escaping of special characters and whitespace.
  * Fixed insertion of "$env" in filepaths.
  * Changed tuple printing to be TCL list instead of tuple-like string.

**Minor:**

* Schema: Added tool CLI arguments to ['record', ...] schema.
* Changed create_cmdline() switchlist parameter to accept switch names as specified on command line.
* Changed setup module docs generator to be packaged with SC.
* Changed HTML report to be self-contained.
* Fixed CSV manifest generation.

SiliconCompiler 0.9.0 (2022-05-19)
=========================================

**Major:**

* Schema: Reorganized entire schema! Changes summarized below:

  * Cleaned and consolidated top-level organization, most parameters are now nested.
  * Moved build configuration options underneath ['option', ...].
  * Added ['output', ...] to store pointers to flow outputs.
  * Added ['model', ...] to store pointers to design abstractions (timing libraries, layouts, etc).
  * Added ['datasheet', ...] to store information about design's interface.
  * Added ['unit', ...]  to store user driven SI units specification (temp,voltage, etc)
  * Renamed ['eda', ...] to ['tool', ...]
  * Renamed ['mcmm', ...] to ['constraint', ...]
  * Replaced ['source'], ['constraint'], and ['read', ...] with more flexible ['input', \<filetype\>] to supply input files.
  * Added support for storing multiple PDKs in schema and selecting which one to use for run (analogous to flows).
  * Change ['flowgraph'] to support modular flow composition
  * Added support for package management ['depgrah'].
  * Added checklist support.
  * Removed special ['library', ...] keypaths. All libraries are now created as Chip objects, and have their full config imported into a parent chip's schema.
* Added 'sup' packaging utility
* Added ability to configure stdout and stderr redirection on a per-tool basis (thanks to @suppamax for implementing).
* Added flexible tool version checking based on PEP-440 standard, now enabled by default.
* Added 'clean' feature for cleaning up intermediate tool outputs.
* Added 'resume' feature for restarting failed flows (for debugging).
* Added automatic capture of peak memory usage (adds dependency on `psutil <https://psutil.readthedocs.io/en/latest/>`_).
* Changed ['design'] to be a required parameter for instantiating a Chip.
* Changed error behavior to consistently raise exceptions rather than exit.
* Removed tool script copy feature, so now all EDA scripts are run from the reference directory.

**Minor:**

* Schema: Added ability to store per-parameter designer notes.
* Added offline wheels distribution.
* Added ``read_lef()`` function to help with PDK bring-up.
* Added environment variables to replay scripts.
* Added LVS/DRC signoff flow and top-level GDS stream out flow.
* Added native support for Sky130 I/O library, along with Heartbeat + padring example.
* Changed internals to minimize SC performance overhead with large flowgraphs.
* Changed task runtime tracking to distinguish between time spent in tool and total time.
* Fixed breakpoints to work more consistently across tools.

Note: Since there was no public release of version 0.8.0, this list summarizes all changes since 0.7.0.

SiliconCompiler 0.7.0 (2022-03-02)
=========================================

**Major:**

* Schema: Added ability to specify environment variables on a per-tool, per-task basis.
* Schema: Added per-tool 'techmap' parameter to library schema.
* Added browser-viewable report generation to core.summary().

**Minor:**

* Schema: Added filetypes to library schema: 'def', 'gerber', 'netlist', 'model' category.
* Schema: Added 'stackup' key to library lef/gds parameters.
* Schema: Changed 'pdk' and 'stackup' library parameters to lists.
* Schema: Added 'dir' passthrough to library schema.
* Schema: Added 'nodisplay' option to schema to better support headless jobs.
* Schema: Added 'licensefile' to package parameters to support non-standard licenses.
* Schema: Added 'gerber' to read schema.
* Schema: Added several cell categories to library schema.
* Changed how PDK-specific Yosys and OpenROAD parameters are driven to avoid hardcoding process info in tool drivers.
* Fixed step ordering bug in core.summary().
* Fixed bug with how 'arg', 'index' is handled.
* Fixed small bugs in automatic documentation generation.
* Added core.check_filepaths() helper.

SiliconCompiler 0.6.0 (2022-02-11)
=========================================

**Major:**

* Schema: Added 'flow' key to flowgraph to enable multi-flow targets.
* Schema: Added 'flow' parameter to enable selection between flows in flowgraph.
* Schema: Changed '_' separated tuple target to a single 'module' load target.
* Schema: Added 'regex' for grep like functionality.
* Schema: Changed metal grid to use PDK metal name as the major key.
* Schema: Added 'tool' key to PDK settings to avoid tool file conflicts.
* Schema: Added 'units' parameter to enable tech agnostic SDC.
* Schema: Added ability to specify tricky apr setup files on a per tool basis (tracks, taps, vias, antenna, etc).
* Schema: Added checklist functionality
* Added core.grep function
* Added core.check_logfile function to core API to emulate grep behavior
* Added core.load_{target, flow, lib, pdk} functions to core API in place of target()
* Added asap7 target
* Added docker support for basic RTL2GDS tool chain
* Removed core.target() function

**Minor:**

* Schema: Changed lib 'driver' to move into cells (consistency)
* Schema: Added site symmetry to avoid full lef parser.
* Schema: Changed tool version switch to a list
* Schema: Changed 'asic', 'targetlib' to 'asic', 'logiclib' for clarity.
* Schema: Changed 'eda, 'report' parameter guideline to always use 'metric' as keyword
* Schema: Added -skip_check option to speed up new target bringup
* Schema: Added -skip_step option to enable skipping specific steps
* Schema: Added 'pdk', ['file', 'directory', 'variable'] parameters to enable tool-specific PDK setups.
* Schema: Changed cell types to be hardcoded (tapcell, buf, clkbuf, etc) to avoid fragmentation.

SiliconCompiler 0.4.1 (2022-01-06)
===================================

**Minor:**

* Fix bug in Yosys parameter requirements spec that made check_manifest() too strict

SiliconCompiler 0.4.0 (2022-01-05)
===================================

**Major:**

* Schema: Add 'tool' key to PDK fields
* Schema: Remove unneeded 'record' keys
* Implement automatic record-keeping
* Implement checks that flow make sense in terms of file I/O and that required files resolve
* Allow importing multiple files with the same basename

**Minor:**

* Automatically configure KLayout path on macOS
* Allow importing multiple files with the same basename
* Implement -I CLI switch for include directory


SiliconCompiler 0.3.1 (2021-12-21)
===================================

**Minor:**

* Fix sc-show on Windows.

SiliconCompiler 0.3.0 (2021-12-21)
===================================

**Major:**

* Schema: add 'read' section.
* Schema: Add alternate frontend support.

**Minor:**

* Fix old version of Surelog bundled with wheels


SiliconCompiler 0.1.1 (2021-12-08)
===================================

**Minor:**

* Fix: Prevent sc-show crash when PDK files are not found.
* Fix: Ensure sc-show can find KLayout executable on Windows

SiliconCompiler 0.1.0 (2021-12-03)
===================================

**Major:**

* First public release!!!
