Hey Trevor, Thanks for contributing. Supporting ARM on Hadoop will require a number of different changes right? Eg given that Hadoop currently depends on some Sun-specific classes, and requires a Sun-compatible JVM you'll have to work around this dependency somehow, there's not a Sun JVM for ARM right?
If there's a handful of additional changes then let's make an umbrella jira for Hadoop ARM support and make the issues you've already filed sub-tasks. You can ping me off-line on how to that if you want. Supporting non-x86 processors and non-gcc compilers is an additional maintenance burden on the project so it would be helpful to have an end-game figured out so these patches don't bitrot in the meantime. Thanks, Eli On Tue, May 10, 2011 at 5:13 PM, Trevor Robinson <tre...@scurrilous.com> wrote: > Is the native build failing on ARM (where gcc doesn't support -m32) a > known issue, and is there a workaround or fix pending? > > $ ant -Dcompile.native=true > ... > [exec] make all-am > [exec] make[1]: Entering directory > `/home/trobinson/dev/hadoop-common/build/native/Linux-arm-32' > [exec] /bin/bash ./libtool --tag=CC --mode=compile gcc > -DHAVE_CONFIG_H -I. -I/home/trobinson/dev/hadoop-common/src/native > -I/usr/lib/jvm/java-6-openjdk/include > -I/usr/lib/jvm/java-6-openjdk/include/linux > -I/home/trobinson/dev/hadoop-common/src/native/src > -Isrc/org/apache/hadoop/io/compress/zlib > -Isrc/org/apache/hadoop/security -Isrc/org/apache/hadoop/io/nativeio/ > -g -Wall -fPIC -O2 -m32 -g -O2 -MT ZlibCompressor.lo -MD -MP -MF > .deps/ZlibCompressor.Tpo -c -o ZlibCompressor.lo `test -f > 'src/org/apache/hadoop/io/compress/zlib/ZlibCompressor.c' || echo > '/home/trobinson/dev/hadoop-common/src/native/'`src/org/apache/hadoop/io/compress/zlib/ZlibCompressor.c > [exec] libtool: compile: gcc -DHAVE_CONFIG_H -I. > -I/home/trobinson/dev/hadoop-common/src/native > -I/usr/lib/jvm/java-6-openjdk/include > -I/usr/lib/jvm/java-6-openjdk/include/linux > -I/home/trobinson/dev/hadoop-common/src/native/src > -Isrc/org/apache/hadoop/io/compress/zlib > -Isrc/org/apache/hadoop/security -Isrc/org/apache/hadoop/io/nativeio/ > -g -Wall -fPIC -O2 -m32 -g -O2 -MT ZlibCompressor.lo -MD -MP -MF > .deps/ZlibCompressor.Tpo -c > /home/trobinson/dev/hadoop-common/src/native/src/org/apache/hadoop/io/compress/zlib/ZlibCompressor.c > -fPIC -DPIC -o .libs/ZlibCompressor.o > [exec] make[1]: Leaving directory > `/home/trobinson/dev/hadoop-common/build/native/Linux-arm-32' > [exec] cc1: error: unrecognized command line option "-m32" > [exec] make[1]: *** [ZlibCompressor.lo] Error 1 > [exec] make: *** [all] Error 2 > > This closest issue I can find is > https://issues.apache.org/jira/browse/HADOOP-6258 (Native compilation > assumes gcc), as well as other issues regarding where and how to > specify -m32/64. However, there doesn't seem to be a specific issue > covering build failure on systems using gcc where the gcc target does > not support -m32/64 (such as ARM). > > I've attached a patch that disables specifying -m$(JVM_DATA_MODEL) > when $host_cpu starts with "arm". (For instance, host_cpu = armv7l for > my system.) To any maintainers on this list, please let me know if > you'd like me to open a new issue and/or attach this patch to an > issue. > > Thanks, > Trevor >
