“Error: java_home is not defined correctly.” Building jikes RVM

When I built jikes RVM on Ubuntu, I received this error Any ideas?

bin/buildit localhost production
---> Config: production
/bin/bash --login -c  '/bin/bash --login -c  "   cd /home/jack/Programs/jikesrvm-3.1.2 &&  export JAVA_HOME=/opt/jdk1.6.0 &&   ant very-clean -Dhost.name=ia32-linux &&  ant check-components-properties -Dhost.name=ia32-linux -Dtarget.name=ia32-linux -Dcomponents.cache.dir=/home/jack/.buildit_components_cache  &&   ant -Dtarget.name=ia32-linux -Dconfig.name=production -Dhg.revision= -Dhost.name=ia32-linux -Dcomponents.cache.dir=/home/jack/.buildit_components_cache "' 
Error: JAVA_HOME is not defined correctly.
  We cannot execute /opt/jdk1.6.0/bin/java
Wed Jun 13 12:23:37 EDT 2012
===================== Summary =====================
Local   : /home/jack/Programs/jikesrvm-3.1.2
Build   : ubuntu:/home/jack/Programs/jikesrvm-3.1.2
Target  : ubuntu:/home/jack/Programs/jikesrvm-3.1.2
Start   : Wed Jun 13 12:23:37 EDT 2012
Config  : production [Failed Wed Jun 13 12:23:37 EDT 2012]
===================================================

OS：

Linux ubuntu 2.6.32-24-generic #39-Ubuntu SMP Wed Jul 28 06:07:29 UTC 2010 i686 GNU/Linux

Environment variables: Paths

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/jvm/java-6-sun-1.6.0.22/bin<

JAVA_ HOME

/usr/lib/jvm/java-6-sun-1.6.0.22

I checked Java_ Java in the home / bin directory can work No matter how I change the environment variable, the error is always complaining

It seems that I haven't changed the correct "position"

Solution

Run this command:

find . -exec grep "jdk1.6.0" {} \;

To find out which Java_ Home is set to the file in this path