pitrou opened a new issue, #46196: URL: https://github.com/apache/arrow/issues/46196
### Describe the enhancement requested As discussed in https://lists.apache.org/thread/oqchx4xchq0r8w0d89qohqdhrn6pr09j , we can remove `ARROW_USE_PRECOMPILED_HEADERS` immediately as `CMAKE_UNITY_BUILD` is usually more robust and brings similar benefits. ### Component(s) C++ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org