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Added info about missing protoc (#1275)

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Co-authored-by: figgefigge <fredric.1337mail.com>
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figgefigge
2023-11-06 06:47:32 +01:00
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@ -348,6 +348,25 @@ mdbook test candle-book -L .\target\debug\deps\ `
This may be caused by the models being loaded from `/mnt/c`, more details on
[stackoverflow](https://stackoverflow.com/questions/68972448/why-is-wsl-extremely-slow-when-compared-with-native-windows-npm-yarn-processing).
#### Missing protoc installation when compiling candle-onnx
The candle-onnx dependency prost-build no longer comes bundled with prost binaries. This could cause the following error when attempting to compile candle-onnx:
```
error: failed to run custom build command for `candle-onnx v0.3.0 (C:\Projekt\candle\candle-onnx)`
Caused by: // (...)
Could not find `protoc` installation and this build crate cannot proceed without
this knowledge.
```
To fix this issue:
1. Download protoc for your platform from the official Protocol Buffers GitHub repository: [github.com/protocolbuffers/protobuf/releases](https://github.com/protocolbuffers/protobuf/releases).
2. Extract the protoc binary from the downloaded archive's bin folder.
3. Add the location of the protoc binary to your system's PATH, or set the location in a new PROTOC environment variable.
This should resolve the error and allow you to compile candle-onnx successfully.
#### Tracking down errors
You can set `RUST_BACKTRACE=1` to be provided with backtraces when a candle