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Add note about using newer protoc in contributing doc (#1824)

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Cijo Thomas 2024-05-24 13:01:56 -07:00 committed by GitHub
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CONTRIBUTING.md
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@ -37,6 +37,11 @@ You can provide the protocol compiler protoc path programmatically (only works w
export PROTOC=$(which protoc)
```
It is recommended to use "3.15" or newer of protoc, as some of the proto
definitions include "optional" fields, that are not supported in older versions,
resulting in errors as shown
[here](https://github.com/open-telemetry/opentelemetry-proto/issues/451).
Prerequisites to build the protocol compiler protoc from source
- [protoc](https://github.com/protocolbuffers/protobuf)