[#HADOOP-3344] libhdfs: always builds 32bit, even when x86_64 Java used

Hadoop Common

libhdfs: always builds 32bit, even when x86_64 Java used

Created: 03/May/08 10:37 PM Updated: 08/Jul/09 05:05 PM

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Component/s:

build

Affects Version/s:

None

Fix Version/s:

0.20.0

Time Tracking:

Not Specified

File Attachments:

File Name	Date Attached	Attached By	Size
HADOOP-3344-v2.patch	2008-10-31 03:46 AM	Giridharan Kesavan	3.00 MB
HADOOP-3344.patch	2008-12-16 07:47 AM	Giridharan Kesavan	1.18 MB
HADOOP-3344.patch	2008-12-15 05:57 AM	Giridharan Kesavan	1.18 MB
HADOOP-3344.patch	2008-12-12 03:37 PM	Giridharan Kesavan	1.18 MB
HADOOP-3344.v0.patch	2008-05-07 01:02 AM	Craig Macdonald	15 kB
HADOOP-3344.v1.patch	2008-05-14 03:35 PM	Craig Macdonald	25 kB
HADOOP-3344.v3.patch	2008-11-04 08:07 AM	Giridharan Kesavan	1.18 MB

Environment:

x86_64 linux, x86_64 Java installed

Issue Links:

Incorporates

This issue is part of:

HADOOP-2318 All C++ builds should use the autoconf tools

Hadoop Flags:	Reviewed, Incompatible change
Release Note:	Changed build procedure for libhdfs to build correctly for different platforms. Build instructions are in the Jira item.
Resolution Date:	16/Dec/08 08:22 AM

Description

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The makefile for libhdfs is hard-coded to compile 32bit libraries. It should perhaps compile dependent on which Java is set.

The relevant lines are:

LDFLAGS = -L$(JAVA_HOME)/jre/lib/$(OS_ARCH)/server -ljvm -shared -m32 -Wl,-x
CPPFLAGS = -m32 -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/$(PLATFORM)

$OS_ARCH can be (e.g.) amd64 if you're using a 64bit java on the x86_64 platform. So while gcc will try to link against the correct libjvm.so, it will fail because libhdfs is to be built 32bit (because of -m32)

     [exec] /usr/bin/ld: skipping incompatible /usr/java64/latest/jre/lib/amd64/server/libjvm.so when searching for -ljvm
     [exec] /usr/bin/ld: cannot find -ljvm
     [exec] collect2: ld returned 1 exit status
     [exec] make: *** [/root/def/hadoop-0.16.3/build/libhdfs/libhdfs.so.1] Error 1

The solution should be to specify -m32 or -m64 depending on the os.arch detected.

There are 3 cases to check:

32bit OS, 32bit java => libhdfs should be built 32bit, specify -m32
64bit OS, 32bit java => libhdfs should be built 32bit, specify -m32
64bit OS, 64bit java => libhdfs should be built 64bit, specify -m64

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