[jira] [Commented] (ARROW-18039) [C++][CI] Reduce MinGW build times

["Antoine Pitrou (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-18039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17617179#comment-17617179 ] 

Antoine Pitrou commented on ARROW-18039:
----------------------------------------

cc [~kou]

> [C++][CI] Reduce MinGW build times
> ----------------------------------
>
>                 Key: ARROW-18039
>                 URL: https://issues.apache.org/jira/browse/ARROW-18039
>             Project: Apache Arrow
>          Issue Type: Wish
>          Components: C++, Continuous Integration
>            Reporter: Antoine Pitrou
>            Priority: Major
>
> The MinGW C++ builds on CI currently build in release mode. This is probably because debug builds on Windows are complicated (you must get all the dependencies also compiled in debug mode, AFAIU).
> However, we could probably disable optimizations, so as to reduce compilation times.
> The compilation flags are currently as follows:
> {code}
> -- CMAKE_C_FLAGS:  -O2 -DNDEBUG -ftree-vectorize  -Wa,-mbig-obj -Wall -Wno-conversion -Wno-sign-conversion -Wunused-result -fno-semantic-interposition -mxsave -msse4.2 
> -- CMAKE_CXX_FLAGS:  -Wno-noexcept-type  -fdiagnostics-color=always -O2 -DNDEBUG -ftree-vectorize  -Wa,-mbig-obj -Wall -Wno-conversion -Wno-sign-conversion -Wunused-result -fno-semantic-interposition -mxsave -msse4.2 
> {code}
> Perhaps we can pass {{-O0}}?



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