Bug 1151741

Created attachment 945928 [details]
fix build on ARM

hadoop build fails on ARM in Java detection in hadoop-common with

...
[INFO] 
[INFO] --- maven-antrun-plugin:1.7:run (make) @ hadoop-common ---
[INFO] Executing tasks
main:
     [exec] -- The C compiler identification is GNU 4.9.1
     [exec] -- The CXX compiler identification is GNU 4.9.1
     [exec] -- Check for working C compiler: /usr/bin/cc
     [exec] -- Check for working C compiler: /usr/bin/cc -- works
     [exec] -- Detecting C compiler ABI info
     [exec] -- Detecting C compiler ABI info - done
     [exec] -- Check for working CXX compiler: /usr/bin/c++
     [exec] -- Check for working CXX compiler: /usr/bin/c++ -- works
     [exec] -- Detecting CXX compiler ABI info
     [exec] -- Detecting CXX compiler ABI info - done
     [exec] Soft-float JVM detected
     [exec] -- Looking for exit
     [exec] -- Looking for exit - not found
     [exec] -- Configuring incomplete, errors occurred!
     [exec] See also "/builddir/build/BUILD/hadoop-common-9e2ef43a240fb0f603d8c384e501daec11524510/hadoop-common-project/hadoop-common/target/native/CMakeFiles/CMakeOutput.log".
     [exec] See also "/builddir/build/BUILD/hadoop-common-9e2ef43a240fb0f603d8c384e501daec11524510/hadoop-common-project/hadoop-common/target/native/CMakeFiles/CMakeError.log".
     [exec] CMake Error at JNIFlags.cmake:59 (message):
     [exec]   Soft-float dev libraries required (e.g.  'apt-get install libc6-dev-armel'
     [exec]   on Debian/Ubuntu)
     [exec] Call Stack (most recent call first):
     [exec]   CMakeLists.txt:24 (include)
     [exec] 
...

The Java detection in JNIFlags.cmake is wrong when hadoop is built in a distribution. The solution is to drop the special handling of ARM completely, see the attached patch. Resulting scratch build is http://koji.fedoraproject.org/koji/taskinfo?taskID=7820354

Version-Release number of selected component (if applicable):
hadoop-2.4.1-5.fc21