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https://issues.apache.org/jira/browse/MAPREDUCE-5977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14096748#comment-14096748
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Manu Zhang commented on MAPREDUCE-5977:
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Thanks for the comment.
1. Just wrote a performance test on WritableUtils:writeFloat, where I wrote out
a float for 10M times. I didn't find any difference w/ and w/o strict-aliasing
flag. Also checked about other native perf tests and no impact of
-fno-strict-aliasing was found.
2. oh, I was too happy removing unused codes. I will use assertion.
3. your trick looks fine.
will upload a new patch soon
> Fix or suppress native-task gcc warnings
> ----------------------------------------
>
> Key: MAPREDUCE-5977
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5977
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: task
> Reporter: Todd Lipcon
> Assignee: Manu Zhang
> Attachments: gcc_compile.log, mapreduce-5977-v2.txt,
> mapreduce-5977.txt
>
>
> Currently, building the native task code on gcc 4.8 has a fair number of
> warnings. We should fix or suppress them so that new warnings are easier to
> see.
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