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https://issues.apache.org/jira/browse/ARROW-6514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16948018#comment-16948018
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Wes McKinney commented on ARROW-6514:
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AFAIK minor revisions of LLVM are supposed to be bugfix only, so this might be
okay
> [Developer][C++][CMake] LLVM tools are restricted to the exact version 7.0
> --------------------------------------------------------------------------
>
> Key: ARROW-6514
> URL: https://issues.apache.org/jira/browse/ARROW-6514
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Krisztian Szucs
> Priority: Major
>
> I have LLVM 7.1 installed locally, and FindClangTools couldn't locate it
> because ARROW_LLVM_VERSION is [hardcoded to
> 7.0|https://github.com/apache/arrow/blob/3f2a33f902983c0d395e0480e8a8df40ed5da29c/cpp/CMakeLists.txt#L91-L99]
> and clang tools is [restricted to the minor
> version|https://github.com/apache/arrow/blob/3f2a33f902983c0d395e0480e8a8df40ed5da29c/cpp/cmake_modules/FindClangTools.cmake#L78].
> If it makes sense to restrict clang tools location down to the minor version,
> then we need to pass the located LLVM's version instead of the hardcoded one.
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