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https://issues.apache.org/jira/browse/HADOOP-8569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13409085#comment-13409085
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Eli Collins commented on HADOOP-8569:
-------------------------------------
The disadvantage is that libhdfs currently compiles on non-gnu systems and this
breaks that. What functions are we using that are currently being hidden that
are only declared via _gnu_source? If the above is true we should be able to
use these via including std headers.
> 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
>
>
> 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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