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https://issues.apache.org/jira/browse/ARROW-8623?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-8623.
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Assignee: Wes McKinney
Resolution: Fixed
Only a usage of boost/multiprecision remains and outside of header files
> [C++][Gandiva] Reduce use of Boost, remove Boost headers from header files
> --------------------------------------------------------------------------
>
> Key: ARROW-8623
> URL: https://issues.apache.org/jira/browse/ARROW-8623
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++, C++ - Gandiva
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Priority: Major
> Fix For: 1.0.0
>
>
> Boost is currently a transitive dependency of many of Gandiva's public header
> files. I suggest the following:
> * Do not include Boost transitively in any installed header file
> * Reduce usages of Boost altogether
> On the latter point, most usages of Boost can be trimmed by having a
> {{hash_combine}} function inside the Arrow codebase. See results of grepping
> the codebase
> https://gist.github.com/wesm/190006d91628e6bf7c04deb596a52cff
> It seems that Boost cannot be easily eliminated altogether at the present
> moment because of a use of Boost.Multiprecision ({{int256_t}}). At some point
> someone may want to implement sufficient 256-bit integer functions so that we
> don't have to depend on Boost.Multiprecision
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