[jira] [Updated] (ARROW-14361) [C++] Define a DEFAULT value for ARROW_SIMD_LEVEL

["Krisztian Szucs (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-14361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Krisztian Szucs updated ARROW-14361:
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    Summary: [C++] Define a DEFAULT value for ARROW_SIMD_LEVEL  (was: [C++] Define a MAX default value for ARROW_SIMD_LEVEL)

> [C++] Define a DEFAULT value for ARROW_SIMD_LEVEL
> -------------------------------------------------
>
>                 Key: ARROW-14361
>                 URL: https://issues.apache.org/jira/browse/ARROW-14361
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++
>            Reporter: Krisztian Szucs
>            Assignee: Yibo Cai
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 6.0.0
>
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> In order to enable {{ARROW_HAVE_NEON}} CMake flag on ARM architectures {{ARROW_SIMD_LEVEL}} option must be set to not {{"NONE"}}, see https://github.com/apache/arrow/blob/master/cpp/cmake_modules/SetupCxxFlags.cmake#L444
> The default value for {{ARROW_SIMD_LEVEL}} is {{SSE4_2}} which is a bit misleading on ARM64, it should rather be {{NEON}} which is not listed as a valid option for {{ARROW_SIMD_LEVEL}}. We may have a {{"MAX"}} default value similarly to the  {{ARROW_RUNTIME_SIMD_LEVEL}} option, see https://github.com/apache/arrow/blob/master/cpp/cmake_modules/DefineOptions.cmake#L115
> Original github comment: https://github.com/apache/arrow/pull/11433#discussion_r729852835
> cc [~yibocai] [~apitrou] 



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