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From "Craig Macdonald (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3344) libhdfs: always builds 32bit, even when x86_64 Java used
Date Wed, 07 May 2008 01:03:55 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Craig Macdonald updated HADOOP-3344:

    Attachment: HADOOP-3344.v0.patch

Ok, this is first attempt at an autotools build system.

 * It doesn't yet work. I havent figured out how to get .so shared files built, so building
the tests fail
 * The autoconf macros came from Apache Commons, Daemon. Hope this is OK?
 * I still need to test on other linux architectures. Will need other volunteers for alternative
 * Requires autoconf 2.61, for the AC_TYPE_INT64_T and similar macros

To build configure & Makefile, do:
autoreconf;  libtoolize && aclocal -I ../utils/m4/ &&  automake -a --foreign
&& autoconf
For normal building:
./configure && make

Can anyone provide assistance in completing this?

> libhdfs: always builds 32bit, even when x86_64 Java used
> --------------------------------------------------------
>                 Key: HADOOP-3344
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3344
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: build, libhdfs
>         Environment: x86_64 linux, x86_64 Java installed
>            Reporter: Craig Macdonald
>         Attachments: HADOOP-3344.v0.patch
> 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)
> {noformat}
>      [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
> {noformat}
> 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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