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From "Akira AJISAKA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10358) libhadoop doesn't compile on Mac OS X
Date Fri, 21 Feb 2014 22:49:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13908945#comment-13908945

Akira AJISAKA commented on HADOOP-10358:

This issue seems to be reported by HADOOP-9648 and an patch is availble now.

> libhadoop doesn't compile on Mac OS X
> -------------------------------------
>                 Key: HADOOP-10358
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10358
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: native
>         Environment: Mac OS X 10.8.5
> Oracle JDK 1.7.0_51
>            Reporter: Ilya Maykov
>            Priority: Minor
>         Attachments: HADOOP-10358-fix-hadoop-common-native-on-os-x.patch
> The native component of hadoop-common (libhadoop.so on linux, libhadoop.dylib on mac)
fails to compile on Mac OS X. The problem is in  hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/security/JniBasedUnixGroupsNetgroupMapping.c
at lines 76-78:
> [exec] /Users/ilyam/src/github/apache/hadoop-common/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/security/JniBasedUnixGroupsNetgroupMapping.c:77:26:
error: invalid operands to binary expression ('void' and 'int')
> [exec]  if(setnetgrent(cgroup) == 1) {
> [exec]      ~~~~~~~~~~~~~~~~~~~ ^  ~
> There are two problems in the code:
> 1) The #ifndef guard only checks for __FreeBSD__ but should check for either one of __FreeBSD__
or __APPLE__. This is because Mac OS X inherits its syscalls from FreeBSD rather than Linux,
and thus the setnetgrent() syscall returns void.
> 2) setnetgrentCalledFlag = 1 is set outside the #ifndef guard, but the syscall is only
invoked inside the guard. This means that on FreeBSD, endnetgrent() can be called in the cleanup
code without a corresponding setnetgrent() invocation.
> I have a patch that fixes both issues (will attach in a bit). With this patch, I'm able
to compile libhadoop.dylib on Mac OS X, which in turn lets me install native snappy, lzo,
etc compressor libraries on my client. That lets me run commands like 'hadoop fs -text somefile.lzo'
from the macbook rather than having to ssh to a linux box, etc.
> Note that this patch only fixes the native build of hadoop-common-project. Some other
components of hadoop still fail to build their native components, but libhadoop.dylib is enough
for the client.

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