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https://issues.apache.org/jira/browse/ARROW-849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15972978#comment-15972978
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Wes McKinney commented on ARROW-849:
------------------------------------

We'll have to be careful of FindBoost.cmake's expectation that BOOST_ROOT / 
BOOST_INCLUDEDIR / BOOST_LIBRARYDIR are environment variables

> [C++] Add optional $ARROW_BUILD_TOOLCHAIN environment variable option for 
> configuring build environment
> -------------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-849
>                 URL: https://issues.apache.org/jira/browse/ARROW-849
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>             Fix For: 0.3.0
>
>
> Some users will install a centralized build toolchain containing all of the 
> build dependencies for Arrow. We should provide an environment variable 
> option to help with this, rather than having to set each thirdparty $FOO_HOME 
> variable separately.



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