Gentoo apparently still supports PPC:
https://wiki.gentoo.org/wiki/Handbook:PPC
If you go for it, define the ACCEPT_LICENSE variable to "-* @FSF-APPROVED
@FSF-APPROVED-OTHER". See https://wiki.gentoo.org/wiki/License_Groups
Also, add the "deblob" flag to the USE variable:
https://packages.gentoo.org/useflags/deblob
However, even with those settings, the situation is not perfect: programs
that raise subtle freedom issues, such as those listed at
http://libreplanet.org/wiki/List_of_software_that_does_not_respect_the_Free_System_Distribution_Guidelines
would still be installed unaltered.
