Tengo problemas instalando arduino, de hecho los paquetes se installan sin mensage de error solo con la adventencia
Missing avr-g++; you need to crossdev -s4 avr
Y al final del porceso cuando quiero comenszar a compilar con esta el compilador avr-g++.
Tambien lo he instentado usando el meto de gentoo.
En make.conf/custom 
FEATURES="${FEATURES} -getbinpkg"
Lego sigo las indicacion de https://wiki.gentoo.org/wiki/Arduino
Me da un error en :
crossdev -s4 --stable --portage --verbose --target avr
El logn resultante es:
Calculating dependencies . * Missing digest for ‘/usr/local/portage-crossdev/cross-avr/binutils/binutils-9999.ebuild’
- Missing digest for ‘/usr/local/portage-crossdev/cross-avr/binutils/binutils-2.34.ebuild’
- Missing digest for ‘/usr/local/portage-crossdev/cross-avr/binutils/binutils-2.33.1-r1.ebuild’
- Missing digest for ‘/usr/local/portage-crossdev/cross-avr/binutils/binutils-2.33.1.ebuild’
- Missing digest for ‘/usr/local/portage-crossdev/cross-avr/binutils/binutils-2.32-r2.ebuild’
- Missing digest for ‘/usr/local/portage-crossdev/cross-avr/binutils/binutils-2.32-r1.ebuild’
- Missing digest for ‘/usr/local/portage-crossdev/cross-avr/binutils/binutils-2.31.1-r6.ebuild’
- Missing digest for ‘/usr/local/portage-crossdev/cross-avr/binutils/binutils-2.30-r4.ebuild’
… done!!!! All ebuilds that could satisfy “cross-avr/binutils” have been masked.
!!! One of the following masked packages is required to complete your request:
- cross-avr/binutils-9999::crossdev (masked by: corruption)
- cross-avr/binutils-2.34::crossdev (masked by: corruption)
- cross-avr/binutils-2.33.1-r1::crossdev (masked by: corruption)
- cross-avr/binutils-2.33.1::crossdev (masked by: corruption)
- cross-avr/binutils-2.32-r2::crossdev (masked by: corruption)
- cross-avr/binutils-2.32-r1::crossdev (masked by: corruption)
- cross-avr/binutils-2.31.1-r6::crossdev (masked by: corruption)
- cross-avr/binutils-2.30-r4::crossdev (masked by: corruption)
Cualquier sugerencias … gracias de antemano.