/home/cpanrun/build/5.6.1/bin/perl Build.PL 
Creating custom builder _build/lib/MyModuleBuilder.pm in _build/lib
Checking whether your kit is complete...
ERROR: GCJ::Cni: Prerequisite GCJ::Cni isn't installed
ERRORS/WARNINGS FOUND IN PREREQUISITES.  You may wish to install the versions
 of the modules indicated above before proceeding with this installation.

Looks good
Creating new 'Build' script for 'Java-Import' version '0.03'
/home/cpanrun/build/5.6.1/bin/perl Build
gcj -C src/ArgumentArray.java src/ArrayWrapper.java src/ObjectWrapper.java
Can't exec "gcj": No such file or directory at /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/Module/Build/Base.pm line 1917.
gcjh src/ArgumentArray
Can't exec "gcjh": No such file or directory at /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/Module/Build/Base.pm line 1917.
gcjh src/ArrayWrapper
Can't exec "gcjh": No such file or directory at /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/Module/Build/Base.pm line 1917.
gcjh src/ObjectWrapper
Can't exec "gcjh": No such file or directory at /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/Module/Build/Base.pm line 1917.
gcj -fjni -c src/ArgumentArray.java src/ArrayWrapper.java src/ObjectWrapper.java -I src -o src/java.o
Can't exec "gcj": No such file or directory at /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/Module/Build/Base.pm line 1917.
lib/Java/TieJavaArray.pm -> blib/lib/Java/TieJavaArray.pm
lib/Java/Wrapper.pm -> blib/lib/Java/Wrapper.pm
lib/Java/Import.pm -> blib/lib/Java/Import.pm
lib/Java/ClassProxy.pm -> blib/lib/Java/ClassProxy.pm
lib/Java/Wrapper.xs -> lib/Java/Wrapper.c
/home/cpanrun/build/5.6.1/bin/perl "-I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi" "-I/home/cpanrun/build/5.6.1/lib/5.6.1" "/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp" -noprototypes -typemap "/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap" "lib/Java/Wrapper.xs"gcc -Isrc -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi/CORE -x c++ -include gcj/cni.h -c -DUSE_REENTRANT_API -D_GNU_SOURCE -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -o lib/Java/Wrapper.o lib/Java/Wrapper.c
cpp: gcj/cni.h: No such file or directory
error building so file from 'lib/Java/Wrapper.c' at /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/Module/Build/Base.pm line 1778.
make: *** [all] Error 2