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https://issues.apache.org/jira/browse/HADOOP-11505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15027194#comment-15027194
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Alan Burlison commented on HADOOP-11505:
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It's looking in /usr/include for one of endian.h, sys/endian.h or 
sys/byteorder.h, and then for either be16toh or BSWAP_64. If the include file 
is in a different place on OSX or the macros are called something different 
then no, it won't work. I don't have access to OSX to check, but as long as 
there's a way to define the HADOOP_XXX macros in 
hadoop-common-project/hadoop-common/src/CMakeLists.txt then the rest should 
just work - everything else in the patch uses the macros that are 
probed/configured by CMake.

> hadoop-mapreduce-client-nativetask uses bswap where be32toh is needed, 
> doesn't work on non-x86
> ----------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-11505
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11505
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>         Attachments: HADOOP-11505.001.patch, HADOOP-11505.003.patch, 
> HADOOP-11505.004.patch, HADOOP-11505.005.patch
>
>
> hadoop-mapreduce-client-nativetask fails to use x86 optimizations in some 
> cases.  Also, on some alternate, non-x86, non-ARM architectures the generated 
> code is incorrect.  Thanks to Steve Loughran and Edward Nevill for finding 
> this.



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