Fixes problems with non-ASCII characters in paths. Fixes#3424.
Changes
- Bump the minimum supported Clang version to 11 to support std::filesystem
- Use std::optional for empty values instead of string sentinels like "None"
- Remove the FixedString class
- Move the EvalFile network path from the network struct to the engine
- Simplify parts of the command-line handling
- Remove the old dual-net logic from export_net
- And ofc we now support non-ascii paths for windows
Behavior Change
- Because the EvalFile is no longer part of the network, it won't be included in the hashing, thus the network sharing is no longer dependent on the EvalFile path
- As a result, if the binary version and network are the same, changing only the EvalFile location will now reuse the same shared network
This also fixes a master bug where:
```
export_net None
setoption name EvalFile value None
export_net None
Failed to export a net
```
would fail on the second export. With this patch, the second export succeeds.
Quick Fishtest Check that nets load like normal.
https://tests.stockfishchess.org/tests/view/6a455593f97ff95f787954da
<img width="833" height="1137" alt="image" src="https://github.com/user-attachments/assets/fffee63b-c63a-4d5e-b13d-87d58bc28c88" />
closes https://github.com/official-stockfish/Stockfish/pull/6937
No functional change
Co-authored-by: anematode <timothy.herchen@gmail.com>
Pin every external action used by the root GitHub workflow set to a full-length
commit SHA and keep the selected release tag as a same-line comment.
Update the root workflows to the latest stable tagged action versions found
during the audit while preserving existing release guards, permissions, and
reusable workflow wiring.
closes https://github.com/official-stockfish/Stockfish/pull/6754
No functional change.
