[jira] [Commented] (ARROW-16876) NDEBUG required by -fno-rtti

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

    [ https://issues.apache.org/jira/browse/ARROW-16876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17557338#comment-17557338 ] 

Antoine Pitrou commented on ARROW-16876:
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1) For the record, is there a particular reason for compiling without RTTI?

2) What does dynamic_cast do if RTTI is disabled?

> NDEBUG required by -fno-rtti
> ----------------------------
>
>                 Key: ARROW-16876
>                 URL: https://issues.apache.org/jira/browse/ARROW-16876
>             Project: Apache Arrow
>          Issue Type: Wish
>          Components: C++
>    Affects Versions: 8.0.0
>            Reporter: Jefferson Carpenter
>            Priority: Minor
>
> Some of the code in checked_cast.h uses {{dynamic_cast}} unless NDEBUG is defined.  Defining NDEBUG affects other C++ functionality, for example it causes {{assert}} statements to be compiled out of the program.
> It would be nice if Arrow provided some mechanism for compiling without RTTI (viz. not using dynamic_cast) without requiring NDEBUG to be defined and affecting assertions in other code.
>  
> P.S. An alternative workaround would be to include Arrow headers through a project header that defines NDEBUG, has the Arrow include statements, and then undefines NDEBUG.



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