fails to build because of this: https://wiki.freecadweb.org/Compile_on_Linux#Compiling_against_GNU_libc_2.34_and_later Provided manual workaround fixes this ( creating symlink by hand ). emerge --info http://dpaste.com/ECKDEDH9L
Please attach the full build.log and emerge --info as separate attachments (no pastebin).