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Date: Thu, 12 May 2011 20:53:47 +0000 (UTC)
From: "Trevor Robinson (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-1920) libhdfs does not build for ARM
 processors
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    [ https://issues.apache.org/jira/browse/HDFS-1920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032670#comment-13032670 ] 

Trevor Robinson commented on HDFS-1920:
---------------------------------------

No tests included because this change just fixes a build failure. Manually verified that x86-64 builds unchanged (-m64 is properly specified) and that ARM now builds (-m32 is not specified).

Core unit test failures are existing and unrelated issues. This change only affects libhdfs.

Would a committer please review the change?

> libhdfs does not build for ARM processors
> -----------------------------------------
>
>                 Key: HDFS-1920
>                 URL: https://issues.apache.org/jira/browse/HDFS-1920
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: contrib/libhdfs
>    Affects Versions: 0.21.0
>         Environment: $ gcc -v
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/usr/lib/arm-linux-gnueabi/gcc/arm-linux-gnueabi/4.5.2/lto-wrapper
> Target: arm-linux-gnueabi
> Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.5.2-8ubuntu4' --with-bugurl=file:///usr/share/doc/gcc-4.5/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.5 --enable-shared --enable-multiarch --with-multiarch-defaults=arm-linux-gnueabi --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib/arm-linux-gnueabi --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.5 --libdir=/usr/lib/arm-linux-gnueabi --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --enable-gold --enable-ld=default --with-plugin-ld=ld.gold --enable-objc-gc --disable-sjlj-exceptions --with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb --disable-werror --enable-checking=release --build=arm-linux-gnueabi --host=arm-linux-gnueabi --target=arm-linux-gnueabi
> Thread model: posix
> gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
> $ uname -a
> Linux panda0 2.6.38-1002-linaro-omap #3-Ubuntu SMP Fri Apr 15 14:00:54 UTC 2011 armv7l armv7l armv7l GNU/Linux
>            Reporter: Trevor Robinson
>         Attachments: hadoop-hdfs-arm.patch
>
>
> $ ant compile -Dcompile.native=true -Dcompile.c++=1 -Dlibhdfs=1 -Dfusedfs=1
> ...
> create-libhdfs-configure:
> ...
>      [exec] configure: error: Unsupported CPU architecture "armv7l"
> Once the CPU arch check is fixed in src/c++/libhdfs/m4/apsupport.m4, then next issue is -m32:
> $ ant compile -Dcompile.native=true -Dcompile.c++=1 -Dlibhdfs=1 -Dfusedfs=1
> ...
> compile-c++-libhdfs:
>      [exec] /bin/bash ./libtool --tag=CC   --mode=compile gcc -DPACKAGE_NAME=\"libhdfs\" -DPACKAGE_TARNAME=\"libhdfs\" -DPACKAGE_VERSION=\"0.1.0\" -DPACKAGE_STRING=\"libhdfs\ 0.1.0\" -DPACKAGE_BUGREPORT=\"omalley@apache.org\" -DPACKAGE_URL=\"\" -DPACKAGE=\"libhdfs\" -DVERSION=\"0.1.0\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" -Dsize_t=unsigned\ int -Dconst=/\*\*/ -Dvolatile=/\*\*/ -I. -I/home/trobinson/dev/hadoop-hdfs/src/c++/libhdfs     -g -O2 -DOS_LINUX -DDSO_DLFCN -DCPU=\"arm\" -m32 -I/usr/lib/jvm/java-6-openjdk/include -I/usr/lib/jvm/java-6-openjdk/include/arm -Wall -Wstrict-prototypes -MT hdfs.lo -MD -MP -MF .deps/hdfs.Tpo -c -o hdfs.lo /home/trobinson/dev/hadoop-hdfs/src/c++/libhdfs/hdfs.c
>      [exec] make: Warning: File `.deps/hdfs_write.Po' has modification time 2.1 s in the future
>      [exec] libtool: compile:  gcc -DPACKAGE_NAME=\"libhdfs\" -DPACKAGE_TARNAME=\"libhdfs\" -DPACKAGE_VERSION=\"0.1.0\" "-DPACKAGE_STRING=\"libhdfs 0.1.0\"" -DPACKAGE_BUGREPORT=\"omalley@apache.org\" -DPACKAGE_URL=\"\" -DPACKAGE=\"libhdfs\" -DVERSION=\"0.1.0\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" "-Dsize_t=unsigned int" "-Dconst=/**/" "-Dvolatile=/**/" -I. -I/home/trobinson/dev/hadoop-hdfs/src/c++/libhdfs -g -O2 -DOS_LINUX -DDSO_DLFCN -DCPU=\"arm\" -m32 -I/usr/lib/jvm/java-6-openjdk/include -I/usr/lib/jvm/java-6-openjdk/include/arm -Wall -Wstrict-prototypes -MT hdfs.lo -MD -MP -MF .deps/hdfs.Tpo -c /home/trobinson/dev/hadoop-hdfs/src/c++/libhdfs/hdfs.c  -fPIC -DPIC -o .libs/hdfs.o
>      [exec] cc1: error: unrecognized command line option "-m32"
>      [exec] make: *** [hdfs.lo] Error 1
> Here, gcc does not support -m32 for the ARM target, so -m${JVM_ARCH} must be omitted from CFLAGS and LDFLAGS.

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