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From Tim Broberg <Tim.Brob...@exar.com>
Subject RE: Example mvn cmd line to build snappy native lib?
Date Mon, 31 Oct 2011 21:56:15 GMT
Solved - In trunk, the snappy symbols are getting linked in with the rest of the native stuff
in libhadoop.so:

[tbroberg@san-mothra trunk]$ nm -gC hadoop-common-project/hadoop-common/target/hadoop-common-0.24.0-SNAPSHOT/lib/libhadoop.so
| grep -i snappy
0000000000003c20 T Java_org_apache_hadoop_io_compress_snappy_SnappyCompressor_compressBytesDirect
00000000000039e0 T Java_org_apache_hadoop_io_compress_snappy_SnappyCompressor_initIDs
0000000000004200 T Java_org_apache_hadoop_io_compress_snappy_SnappyDecompressor_decompressBytesDirect
0000000000003fc0 T Java_org_apache_hadoop_io_compress_snappy_SnappyDecompressor_initIDs

So, this command line is sufficient:

mvn install -Pdist,native -DskipTests

Thanks again for answering, Alejandro.

    - Tim.

________________________________________
From: Tim Broberg [Tim.Broberg@exar.com]
Sent: Monday, October 31, 2011 12:59 PM
To: common-dev@hadoop.apache.org
Subject: RE: Example mvn cmd line to build snappy native lib?

Thanks, Alejandro, but perhaps this is the procedure for a previous version?

SVN trunk provides source in trunk/hadoop-common-project/hadoop-common/target/native/src/org/apache/hadoop/io/compress/snappy,
but there is no config script or makefile.

There is a fragment of documentation in trunk/BUILDING.txt - "  * Use -Dsnappy.prefix=(/usr/local)
& -Dbundle.snappy=(false) to compile
    Snappy JNI bindings and to bundle Snappy SO files" which suggests that this is maven-able,
and compilation / packaging succeed, but there is no libsnappy.so at the end of the process.

I'd really like not to switch to a different branch of the code yet again, and surely *somebody*
knows how to build snappy in the trunk...

    - Tim.

________________________________________
From: Alejandro Abdelnur [tucu@cloudera.com]
Sent: Monday, October 31, 2011 12:45 PM
To: common-dev@hadoop.apache.org; Tim Broberg
Subject: Re: Example mvn cmd line to build snappy native lib?

Tim,

 You have to download it snappy from source tarball, run './configure' and
then 'make install'

Thanks.

Alejandro

On Mon, Oct 31, 2011 at 11:24 AM, Tim Broberg <tbroberg@yahoo.com> wrote:

> bump
>
> Does anybody know how to build the snappy native library?
>
>     - Tim.
>
>
> ________________________________
> From: Tim Broberg <tbroberg@yahoo.com>
> To: "common-dev@hadoop.apache.org" <common-dev@hadoop.apache.org>
> Sent: Friday, October 28, 2011 11:52 PM
> Subject: Example mvn cmd line to build snappy native lib?
>
> I'm trying to build the trunk from hadoop SVN including all the native
> libraries.
>
> The BUILDING.txt file has the following documentation on building the
> native libraries:
>
> "
>  Build options:
>
>   * Use -Pnative to compile/bundle native code
>   * Use -Dsnappy.prefix=(/usr/local) & -Dbundle.snappy=(false) to compile
>     Snappy JNI bindings and to bundle Snappy SO files
> "
>
> I tried the following, but never seem to get a libsnappy.so anywhere:
>
> mvn compile -Pnative
> mvn compile -Pnative -Dsnappy.prefix=/usr/local
>
> mvn compile -Pnative -Dsnappy.prefix=/usr/local -Dbundle.snappy=true
>
> mvn compile -Pnative -Dsnappy.prefix=/usr/local -Dbundle.snappy=false
>
> mvn compile -Pnative -Dsnappy.prefix=~tbroberg -Dbundle.snappy=true
>
>
> If I stick a #error statement in SnappyCompressor.c, I do see the first of
> these fail, so it's doing *something* with snappy.
>
> Can anyone provide an example command line to build this?
>
> Thanks,
>     - Tim.

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