Gentoo cross-avr/avr-libc

Ich versuche mir eine Toolchain zu installieren, um mit mica2 motes 
arbeiten zu können.

Weder mit crossdev -t avr, noch manuell will cross-avr/avr-libc-1.2.6 
sich kompilieren, es bringt nur diesen Fehler:

checking for avr-gcc... avr-gcc  -mmcu=avr6
checking for a BSD compatible install... /usr/bin/install -c
checking for doxygen... no
checking for pngtopnm... no
checking for pngtopnm... no
configure: error: unexpected value 'avr6' for with_multisubdir

!!! Please attach the following file when seeking support:
!!! 
/var/tmp/portage/cross-avr/avr-libc-1.2.6/work/avr-libc-1.2.6/obj-avr/co 
nfig.log
 *
 * ERROR: cross-avr/avr-libc-1.2.6 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 2447:  Called econf 'src_compile'
 *               ebuild.sh, line  513:  Called die
 * The specific snippet of code:
 *                      die "econf failed"
 *  The die message:
 *   econf failed
 *
 * If you need support, post the topmost build error, and the call stack 
if relevant.
 * A complete build log is located at 
'/var/tmp/portage/cross-avr/avr-libc-1.2.6/temp/build.log'.
 * The ebuild environment file is located at 
'/var/tmp/portage/cross-avr/avr-libc-1.2.6/temp/environment'.
 * This ebuild is from an overlay: '/usr/local/portage/'
 *

 * Messages for package cross-avr/binutils-2.18-r3:

 * Sorry, but binutils does not support the LINGUAs: en en_GB

 * Messages for package cross-avr/avr-libc-1.2.6:

 *
 * ERROR: cross-avr/avr-libc-1.2.6 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line 2447:  Called econf 'src_compile'
 *               ebuild.sh, line  513:  Called die
 * The specific snippet of code:
 *                      die "econf failed"
 *  The die message:
 *   econf failed
 *
 * If you need support, post the topmost build error, and the call stack 
if relevant.
 * A complete build log is located at 
'/var/tmp/portage/cross-avr/avr-libc-1.2.6/temp/build.log'.
 * The ebuild environment file is located at 
'/var/tmp/portage/cross-avr/avr-libc-1.2.6/temp/environment'.
 * This ebuild is from an overlay: '/usr/local/portage/'
 *
 * GNU info directory index is up-to-date.



Hat jemand eine Idee?