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Date: Wed, 18 Jun 2014 19:50:25 +0000 (UTC)
From: "Ilya Maykov (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.12696649.1393019449245.2480.1403121025084@arcas>
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Subject: [jira] [Resolved] (HADOOP-10358) libhadoop doesn't compile on Mac
 OS X
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     [ https://issues.apache.org/jira/browse/HADOOP-10358?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ilya Maykov resolved HADOOP-10358.
----------------------------------

    Resolution: Duplicate

Resolving dupe

> 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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