When I try to update my system, I've got the following error:

*************************************************************************************************
# emerge --update world
Calculating world dependencies ...done!
>>> emerge (1 of 62) net-dns/libidn-0.5.15 to /
>>> md5 files ;-) libidn-0.5.4.ebuild
>>> md5 files ;-) libidn-0.5.15.ebuild
>>> md5 files ;-) libidn-0.5.18.ebuild
>>> md5 files ;-) files/digest-libidn-0.5.4
>>> md5 files ;-) files/digest-libidn-0.5.15
>>> md5 files ;-) files/digest-libidn-0.5.18
>>> md5 src_uri ;-) libidn-0.5.15.tar.gz
>>> Unpacking source...
>>> Unpacking libidn-0.5.15.tar.gz to /var/tmp/portage/libidn-0.5.15/work
>>> Source unpacked.
Traceback (most recent call last):
File "/usr/bin/java-config", line 14, in ?
from java_config import jc_options
ImportError: No module named java_config

!!! ERROR: net-dns/libidn-0.5.15 failed.
!!! Function src_compile, Line 25, Exitcode 0
!!! You need to use java-config to set your JVM to a JDK!

*************************************************************************************************

The java-config 1.2.11 is already installed, so I try to edit /usr/bin/java-config.
The problem lines are :

*************************************************************************************************

import sys, getopt, os
from java_config import jc_options
from java_config.jc_output import *

*************************************************************************************************

I don't know what to do now, no ideas.

Regards.

In addition, I try:

# /usr/sbin/env-update && source /etc/profile
>>> Regenerating /etc/ld.so.cache...


# java-config --list-available-vms
Traceback (most recent call last):
File "/usr/bin/java-config", line 14, in ?
from java_config import jc_options
ImportError: No module named java_config


The problem still the same...

Have you tried updating java-config?

# emerge -U java-config

yes, I try this command already.
The errors are:

>>> emerge (7 of 74) net-dns/libidn-0.5.15 to /
>>> md5 files ;-) libidn-0.5.4.ebuild
>>> md5 files ;-) libidn-0.5.15.ebuild
>>> md5 files ;-) libidn-0.5.18.ebuild
>>> md5 files ;-) files/digest-libidn-0.5.4
>>> md5 files ;-) files/digest-libidn-0.5.15
>>> md5 files ;-) files/digest-libidn-0.5.18
>>> md5 src_uri ;-) libidn-0.5.15.tar.gz
>>> Unpacking source...
>>> Unpacking libidn-0.5.15.tar.gz to /var/tmp/portage/libidn-0.5.15/work
>>> Source unpacked.
Traceback (most recent call last):
File "/usr/bin/java-config", line 14, in ?
from java_config import jc_options
ImportError: No module named java_config

!!! ERROR: net-dns/libidn-0.5.15 failed.
!!! Function src_compile, Line 25, Exitcode 0
!!! You need to use java-config to set your JVM to a JDK!

yup, I got my problem fixed. I unmerge the sun-jdk and java-config then emerge them again.
Emerge java-config first, then the sun-jdk.
I found this stuff for reference.

**************************************************************************************************** ***********
If you need to run Java on GNU/Linux running on Sparc64 hardware, your best bet is to get the Blackdown source. This is easy with Gentoo:

srv-1 opt # emerge jdk
Calculating dependencies ...done!
>>> emerge (1 of 2) dev-java/java-config-1.2.11 to /
>>> Downloading http://distfiles.gentoo.org/distfile...1.2.11.tar.bz2
--10:00:21-- http://distfiles.gentoo.org/distfile...1.2.11.tar.bz2
=> `/usr/portage/distfiles/java-config-1.2.11.tar.bz2'
Resolving distfiles.gentoo.org... 216.165.129.135, 64.50.236.52, 156.56.247.195
Connecting to distfiles.gentoo.org[216.165.129.135]:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 15,743 [application/x-tar]

100%[====================================>] 15,743 95.77K/s

10:00:21 (95.60 KB/s) - `/usr/portage/distfiles/java-config-1.2.11.tar.bz2'
saved [15,743/15,743]

>>> md5 files ;-) java-config-1.2.10.ebuild
>>> md5 files ;-) java-config-1.2.11.ebuild
>>> md5 files ;-) java-config-1.2.6.ebuild
.
.
.
No JAVA_HOME available! Please set your Java Virtual Machine
No JAVA_HOME available! Please set your Java Virtual Machine
No JAVA_HOME available! Please set your Java Virtual Machine
No JAVA_HOME available! Please set your Java Virtual Machine
THIS SYSTEM VM IS NOT SUFFICIENT, REQUIRED BINARIES WERE NOT FOUND
System Virtual Machine set
You may want to update your enviroment by running:
"/usr/sbin/env-update && source /etc/profile"
>>> Regenerating /etc/ld.so.cache...

* After installing blackdown-jdk-1.4.1 this
* was set as the default JVM to run.
* When finished please run the following so your
* enviroment gets updated.
* /usr/sbin/env-update && source /etc/profile
* Or use java-config program to set your preferred VM
>>> Regenerating /etc/ld.so.cache...
>>> dev-java/blackdown-jdk-1.4.1-r1 merged.
>>> Recording dev-java/blackdown-jdk in "world" favorites file...

>>> clean: No packages selected for removal.

>>> Auto-cleaning packages ...

>>> No outdated packages were found on your system.


* Regenerating GNU info directory index...
* Processed 12 info files.
* IMPORTANT: 78 config files in /etc need updating.
* Type emerge --help config to learn how to update config files.

srv-1 opt #


If we log on and off, though:

srv-1 ~ # set | grep JAVA
JAVAC=/opt/blackdown-jdk-1.4.1/bin/javac
JAVA_HOME=/opt/blackdown-jdk-1.4.1
srv-1 ~ #

Thanks for your valuable advice. I had exactly the same problem.
Seems like there is a dependecy for the python packages unresolved. So i tried exactly what u suggested:

#emerge --unmerge sun-jdk
#emerge --unmerge java-config
#emerge java-config
#emerge sun-jdk
#etc-update && env-update

and i could proceed with the update process.

Thanks pal.

If you find stuff like that it might be worth while letting them know at bugs.gentoo.org.

What would Dummy's like us have done without guys like you. I had the same problem and after followed your advice, problem solved

Sorry, I forgot to thank you. Thanks a lot

for it worked fine, when i just re-emerged java-config:

#emerge --unmerge java-config
#emerge java-config
#etc-update && env-update

Regards