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https://issues.apache.org/jira/browse/HADOOP-12243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14629913#comment-14629913
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Allen Wittenauer commented on HADOOP-12243:
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Is there any reason to not just rewrite the grep -o's to be POSIX compliant?
> Grep command used in test-patch and smart-apply-patch should be GNU's one,
> not POSIX
> ------------------------------------------------------------------------------------
>
> Key: HADOOP-12243
> URL: https://issues.apache.org/jira/browse/HADOOP-12243
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: yetus
> Reporter: Kengo Seki
>
> test-patch and smart-apply-patch use grep -o, but POSIX does not support that
> option.
> http://pubs.opengroup.org/onlinepubs/9699919799/utilities/grep.html#tag_20_55_04
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