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https://issues.apache.org/jira/browse/HADOOP-8569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13584760#comment-13584760
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Colin Patrick McCabe commented on HADOOP-8569:
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On a related note, I have a bunch of patches to get native compilation working
under OpenBSD that I really should submit at some point.
> CMakeLists.txt: define _GNU_SOURCE and _LARGEFILE_SOURCE
> --------------------------------------------------------
>
> Key: HADOOP-8569
> URL: https://issues.apache.org/jira/browse/HADOOP-8569
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Attachments: HADOOP-8569.001.patch, HADOOP-8569.003.patch
>
>
> In the native code, we should define _GNU_SOURCE and _LARGEFILE_SOURCE so
> that all of the functions on Linux are available.
> _LARGEFILE enables fseeko and ftello; _GNU_SOURCE enables a variety of
> Linux-specific functions from glibc, including sync_file_range.
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